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1 Traffic Measurement
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BSC3119Nokia BSC/TCSM, Rel. S12, ProductDocumentation, v.1
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The information in this document is subject to change without notice and describes only theproduct defined in the introduction of this documentation. This document is intended for the useof Nokia's customers only for the purposes of the agreement under which the document issubmitted, and no part of it may be reproduced or transmitted in any form or means without the
prior written permission of Nokia. The document has been prepared to be used by professionaland properly trained personnel, and the customer assumes full responsibility when using it.Nokia welcomes customer comments as part of the process of continuous development andimprovement of the documentation.
The information or statements given in this document concerning the suitability, capacity, or performance of the mentioned hardware or software products cannot be considered binding butshall be defined in the agreement made between Nokia and the customer. However, Nokia hasmade all reasonable efforts to ensure that the instructions contained in the document areadequate and free of material errors and omissions. Nokia will, if necessary, explain issueswhich may not be covered by the document.
Nokia's liability for any errors in the document is limited to the documentary correction of errors.NOKIA WILL NOT BE RESPONSIBLE IN ANY EVENT FOR ERRORS IN THIS DOCUMENTOR FOR ANY DAMAGES, INCIDENTAL OR CONSEQUENTIAL (INCLUDING MONETARYLOSSES), that might arise from the use of this document or the information in it.
This document and the product it describes are considered protected by copyright according tothe applicable laws.
NOKIA logo is a registered trademark of Nokia Corporation.
Other product names mentioned in this document may be trademarks of their respectivecompanies, and they are mentioned for identification purposes only.
Copyright © Nokia Corporation 2007. All rights reserved.
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Contents
Contents 3
List of tables 4
List of figures 5
Summary of changes 9
1 1 Traffic Measurement 11
2 Counters of Traffic Measurement 23
3 Signalling charts of Traffic Measurement 121
4 Signalling charts of Dual Transfer Mode 193
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Contents
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List of tables
Table 1. Measurement description of Traffic Measurement 11
Table 2. SDCCH attempts counters 11
Table 3. SDCCH success counters 12
Table 4. SDCCH failure counters 12
Table 5. TCH requests and attempts counters 13
Table 6. TCH success counters 14
Table 7. TCH failure counters 16
Table 8. Other counters 18
Table 9. GPRS counters 19
Table 10. Spare counters 20
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List of figures
Figure 1. Basic call without counters 122
Figure 2. Basic call with counters 123
Figure 3. Basic call with priority subscriber 124
Figure 4. FACCH call setup due to SDCCH congestion without counters 125
Figure 5. FACCH call setup due to SDCCH congestion with counters 126
Figure 6. FACCH call setup due to SDCCH congestion, no free TCH channel.Optional software directed retry is not activated 127
Figure 7. Normal release 128
Figure 8. Basic call, no free TCH and queuing or directed retry is not allowed 129Figure 9. Successful TCH queuing 130
Figure 10. Basic call, no free TCHs, unsuccessful queuing and directed retry notactivated 131
Figure 11. TCH assignment failure with cause switch_circuit_pool, queuing anddirected retry not allowed 132
Figure 12. Unsuccessful TCH activation 133
Figure 13. Unsuccessful TCH activation, timer expires while waiting for CHANNEL_ACTIVATION_ACK message 134
Figure 14. TCH assignment failure 135
Figure 15. TCH assignment failure, MSC sends CLEAR_COMMAND message 136
Figure 16. CONNECTION_FAILURE message with cause transcoder_failure duringa call 137
Figure 17. TRX or TSL is blocked with different causes during a call 138
Figure 18. SDCCH congestion, FACCH call setup is not activated 139
Figure 19. Unsuccessful SDCCH activation 140
Figure 20. Unsuccessful SDCCH activation, timer expires while waiting for CHANNEL_ACTIVATION_ACK message 141
Figure 21. Connection failure during SDCCH assignment 142
Figure 22. SDCCH assignment failure 143
Figure 23. Unsuccessful SDCCH activation, timer expires while waiting for PHYSICAL_CONTEXT_CONFIRM message 144
Figure 24. TRX/TSL is blocked with different causes during an SDCCH channel
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activation 145
Figure 25. Successful trunk reservation. Counters updated: 001040, 001041 andbasic call counters, see Figure 2. 146
Figure 26. Unsuccessful trunk reservation 147
Figure 27. Successful internal intra-cell handover. Counters 001090 and 001091 areupdated only with underlay overlay handover. 148
Figure 28. Internal intra-cell HO, successful TCH queuing 149
Figure 29. Unsuccessful internal intra-cell handover, timer expires while waiting for CHANNEL_ACTIVATION_ACK message 151
Figure 30. Unsuccessful internal intra-cell handover, CONNECTION_FAILUREmessage with cause remote_transcoder_failure comes to the targetchannel 152
Figure 31. Unsuccessful internal intra-cell handover, timer expires on the sourcechannel, call cleared 153
Figure 32. Unsuccessful underlay overlay internal intra-cell handover, queuing notallowed 154
Figure 33. Internal intra-cell handover, unsuccessful TCH queuing 155
Figure 34. Internal directed retry 157
Figure 35. Successful internal inter-cell handover 158
Figure 36. Unsuccessful internal inter-cell handover 159
Figure 37. Successful external handover, target 160
Figure 38. Successful external handover, source 161
Figure 39. Unsuccessful external handover, source BSC, timer expires while waitingfor CLEAR_COMMAND message 162
Figure 40. Unsuccessful external handover, MS sends a handover failure 163
Figure 41. Successful traffic reason handover, source 164
Figure 42. Successful SDCCH internal intra-cell handover 165
Figure 43. Unsuccessful SDCCH internal intra-cell handover, timer expires whilewaiting for CHANNEL_ACTIVATION_ACK message 166
Figure 44. Unsuccessful SDCCH internal intra-cell handover, unsuccessful channelactivation 167
Figure 45. Unsuccessful SDCCH internal intra-cell handover,CONNECTION_FAILURE message comes to the target channel duringhandover 168
Figure 46. Successful SDCCH internal inter-cell handover 169
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Figure 47. Unsuccessful SDCCH internal inter-cell handover, BTS sendsCONNECTION_FAILURE message 170
Figure 48. Successful SDCCH external handover target 171
Figure 49. Successful SDCCH external handover source. No countersupdating. 171
Figure 50. Unsuccessful SDCCH external handover, timer expires while waiting for CLEAR_COMMAND message 172
Figure 51. Successful forced release 173
Figure 52. Unsuccessful forced release 174
Figure 53. Unsuccessful forced release with external handover 175
Figure 54. Successful forced handover 176
Figure 55. Unsuccessful forced handover 177
Figure 56. Unsuccessful forced handover with external handover 178
Figure 57. Reconfiguration from TCH to SDCCH 179
Figure 58. Normal call 180
Figure 59. Mobile originated HSCSD call setup 181
Figure 60. Successful internal inter-cell handover for HSCSD, target cell allocationsand activations for three channels 182
Figure 61. A CONNECTION_FAILURE message which comes during anHSCSD 183
Figure 62. Internal intra-cell direct access from a regular DCCH to the super-reuseTRX. Optional software direct access to super-reuse TRX in IUOactivated. 184
Figure 63. Unsuccessful internal intra-cell direct access from regular DCCH to thesuper-reuse TRX due to lack of resources. Optional software directaccess to super-reuse TRX in IUO activated. 185
Figure 64. Timer T3107 expires while waiting for ASSIGNMENT_COMPLETEmessage 186
Figure 65. Average counter updating 187
Figure 66. Successful handover due to DADL/B 188
Figure 67. Unsuccessful DADL/B handover due to lack of resources 188
Figure 68. Successful BSC controlled TRHO 189
Figure 69. Unsuccessful BSC controlled TRHO 189
Figure 70. Dropped call between ASSIGNMENT COMPLETE and
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DISCONNECT 190
Figure 71. Dropped call between ASSIGNMENT COMPLETE and RF CHANNELRELEASE ACK 191
Figure 72. MO DTM call establishment 194
Figure 73. MT DTM call establishment 195
Figure 74. DTM call reallocation; too high CS connection interference 196
Figure 75. DTM call reallocation; inadequate PS connection quality 197
Figure 76. DTM call; internal inter-cell handover; CS connection power budget 198
Figure 77. DTM call; internal inter-cell handover; lack of resources in the PSterritory 199
Figure 78. DTM call; external handover, source BSC 200Figure 79. DTM call; external handover, target BSC 201
Figure 80. DTM call release initiated by the MS 202
Figure 81. DTM call release; packet data transfer end 203
Figure 82. DTM REQUEST rejected when IMSI data not available 204
Figure 83. Unsuccessful MO DTM; activation of a CS TCH in the PS territory fails,timer expires while waiting for CHANNEL ACTIVATION ACK 205
Figure 84. Unsuccessful MT DTM; activation of a CS TCH in the PS territory fails,
timer expires while waiting for CHANNEL ACTIVATION ACK 206Figure 85. Unsuccessful MT DTM; DTM ASSIGNMENT FAILURE received 207
Figure 86. Timer T3107 expires while waiting for ASSIGNMENT COMPLETE 208
Figure 87. DTM call reallocation failure; DTM ASSIGNMENT FAILURE received 209
Figure 88. DTM CS connection drops after ASSIGNMENT COMPLETE;CONNECTION FAILURE received 210
Figure 89. DTM CS connection drops after ASSIGNMENT COMPLETE; RELEASEINDICATION not received 211
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Summary of changes
Changes between document issues are cumulative. Therefore, the latest document issue contains all changes made to previous issues.
Changes made between issues 10 and 9 –1
Related topics revised in Chapter 1.
Call phase information added to updated fields of counters in Chapter 2, whereapplicable.
New counters 001231 – 001234 added. Spare counters 001192, 001193, 001217and 001218 changed to real counters. Counters 001184, 001196, 001198,001199, and 001204 – 001207 modified.
Counters 001150 – 001153 changed to be no longer in use and signalling chart 66removed because Dynamic Hot Spot is no longer supported.
Counters 001209 and 001210 changed to be not in use because Enhanced Qualityof Service is not supported in S12. Enhanced Quality of Service will be availablein S13.
New signalling charts 70 and 71 added, and signalling charts 13, 15, 16, 17, 27,29, 34, 35, 38, 42, 46, and 64 updated in Chapter 3.
Signalling charts of Dual Transfer Mode, which contains some signalling chartsrelated to counters 001233 and 001234, has been added.
Editorial changes made.
Changes made between issues 9 –1 and 9
Spare counter 001216 taken into use.
Signalling charts of Traffic Measurement counters 1086 and 1089 have beenupdated. Counter names of 1086 and 1089 have been updated.
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Changes made between issues 9 and 8 –1
New counters 001204 — 001230 have been added.
Description of the counter number 001003 has been updated.
Counters number 001149 and 001194 have been modified.
Measurement description table has been added.
The name of the document and of Chapter 1 has been changed from BSC Counters: Traffic Measurement to1 Traffic Measurement.
The document has been revised throughout to comply with the latest documentation standards.
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1 1 Traffic MeasurementThe BSC traffic measurement registers information related to the stand alonededicated control channel (SDCCH) and traffic channels (TCH). The BSC trafficmeasurement counters are divided into seven different classes. There are countersregarding the number of attempts to seize TCHs and SDCCHs, successful calls,lengths of the queue, and the reasons for failures. This measurement collects oneset of results for each cell. Signalling charts are drawn with the accuracy of message interface.
Measurement description
Table 1. Measurement description of Traffic Measurement
Measurement
Measurement ID
Measurement abbreviation
Traffic Measurement
1
TRAFFICProduct BSC
Product software release S1
Target name BTS
Measurement counters
. SDCCH attempts counters
Table 2. SDCCH attempts counters
Counter Counter number Seizure attempts 001000
SDCCH seizure attempts for MOC 001135
SDCCH seizure attempts for MTC 001136
Dynamic SDCCH reconfiguration at tempt 001154
SDCCH LU attempts 001231
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. SDCCH success counters
Table 3. SDCCH success counters
Counter Counter number Success seizure for HO 001006
Success seizure for immediate assignment 001007
. SDCCH failure counters
Table 4. SDCCH failure counters
Counter Counter number Seizure attempts with busy SDCCH 001001
Transactions failed due to BSS failure 001002
Transactions failed due to radio failure 001003
Transact. failed due radio on source channel duringHO
001004
Transact. failed due radio on target channel duringHO
001005
SDCCH activation failure 001027
SDCCH Abis problems 001033
SDCCH A interface problems 001034
SDCCH LAPD failure 001035
SDCCH BTS failure 001036
SDCCH user actions 001037
SDCCH BCSU reset 001038
SDCCH network actions 001039
SDCCH activation failure call 001072
SDCCH activation failure target 001074
SDCCH Abis failure call 001075
SDCCH Abis failure source 001076
SDCCH Abis failure target 001077
SDCCH A interface failure call 001078
SDCCH A interface failure source 001079
SDCCH A interface failure target 001080
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Table 4. SDCCH failure counters (cont.)
Counter Counter number Unsuccess immediate assignment SDCCH attempt 001155
SDCCH failures in phase 3 001201
Error indication messages during Location Update 001203
SDCCH LU attempts fail 001232
. TCH requests and attempts counters
Table 5. TCH requests and attempts counters
Counter Counter number TCH request success and unsuccess 001010
Call attempts in the queue 001016
Handover attempts in the queue 001017
TCH call request 001026
Trunk reservation invocations 001040
TCH requests FACCH call setup 001043
Traffic reason HO requests 001052
Traffic reason HO enquiries 001053Forced release assign request at tempts 001054
Forced HO assign request attempts 001055
Queuing allowed assign request attempts 001056
Queuing not allowed assign request attempts 001057
Forced release HO request attempts 001062
Forced HO HO request attempts 001063
Queuing allowed HO request attempts 001064
Queuing not allowed HO request attempts 001065
TCH requests underlay overlay 001090
TCH seizure underlay overlay 001091
Priority subscriber TCH requests 001095
TCH seizure attempt due SDCCH congestion 001098
Full TCH requests success unsuccess 001102
Half TCH requests success unsuccess 001103
TCH requests full preferred 001104
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Table 5. TCH requests and attempts counters (cont.)
Counter Counter number TCH requests half preferred 001105
Full TCH requests FACCH call 001123
TCH FACCH call channel rate not defined 001124
TCH seizure attempts for MOC 001137
TCH seizure attempts for MTC 001138
Queued urgent handover attempts 001142
TCH requests for 14.4k data calls 001156
HSCSD transparent TCH request 001158
HSCSD request for call setup 001160HSCSD TCH request for HO 001161
TCH request for a BSC controlled TRHO procedure 001167
DADLB start due to exceeded load 001172
TCH requests for AMR call 001184
TCH requests for 9.6k data calls 001189
TCH requests for call attempt 001192
HO commands in outgoing MSC-controlled handover 001195
HO commands in outgoing BSC –controlled handover 001196
Assignment commands in intra-BTS handover 001197
. TCH success counters
Table 6. TCH success counters
Counter Counter number Success TCH seizure for HO 001008
Success TCH seizure for normal assignment 001009
Success trunk reservation invocations 001041
TCH seizure FACCH call setup 001044
Forced releases 001070
Forced handovers 001071
Priority subscriber success TCH seizure 001096
TCH seizure due SDCCH congestion 001099
Success full TCH seizure 001106
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Table 7. TCH failure counters
Counter Counter number TCH request rejected due to lack 001011
Transactions ended due to BSS problem 001012
Transactions ended due to radio failure 001013
Transact. ended due source channel failure duringHO
001014
Transact. ended due target channel failure during HO 001015
Not served queued call attempts 001024
Not served queued HO attempts 001025
TCH activation failure 001028
TCH transcoder failure 001029
TCH transcoder failure source 001030
TCH transcoder failure target 001031
Trunk reservation invocations result refused 001042
TCH Abis problems 001045
TCH LAPD failure 001046
TCH BTS failure 001047
TCH user actions 001048
TCH BCSU reset 001049
TCH network actions 001050
TCH A interface problems 001051
Forced release assign request failed 001058
Forced HO assign request failed 001059
Queuing allowed assign request failed 001060
Queuing not allowed assign request failed 001061
Forced release HO request failed 001066
Forced HO HO request failed 001067
Queuing allowed HO request failed 001068
Queuing not allowed HO request failed 001069
TCH activation failure call 001081
TCH activation failure target 001083
TCH Abis failure call 001084
TCH Abis failure source 001085
TCH Abis failure new 001086
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Table 7. TCH failure counters (cont.)
Counter Counter number TCH A interface failure call 001087
TCH A interface failure source 001088
TCH A interface failure new 001089
TCH rejected requests underlay overlay 001092
Non-priority subscriber refused TCH requests 001097
Trunk TCH rejected FR requests 001100
Trunk TCH rejected HR requests 001101
Rejected TCH requests due lack FR 001118
Rejected TCH requests due lack HR 001119Full TCH rejected requests due HR traffic 001120
Half TCH rejected requests due FR traffic 001121
TCH rejected due requested channel A interfacecircuit
001122
Ended due transcoder FR rate 1 001127
Ended due transcoder FR rate 2 001128
Ended due transcoder FR rate 3 001129
Ended due transcoder HR rate 1 001130
Ended due transcoder HR rate 2 001131
Ended due transcoder HR rate 3 001132
Full TCH transaction failures 001133
Half TCH transaction failures 001134
TCH release due to radio failure 001139
TCH release due to BSS failure 001140
TCH seizure failure due to congestion 001141
Queued urgent HO attempts not served 001147
TCH request rejected due to bad quality in adjacents 001151
TCH req rej when qual betw good and bad in adj 001153
HSCSD connection releases due to failure 001164
TCH request for direct access rejected due to lack 001166
Rej TCH seiz for BSC contr TRHO due lack of res 001169
TCH request in DADLB HO rejected 001171
TCH drop due to too low RX level 001194
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Table 7. TCH failure counters (cont.)
Counter Counter number TCH releases due to radio failures, updated inphases 9-11
001198
TCH releases due to BSS failures, updated in phases2-3
001199
TCH releases due to BSS failures, updated in phases9-11
001200
Dropped calls after TCH assignment 001202
Number of TCH drops between Assignment Completeand RF Channel Release messages
001204
Number of TCH releases due to radio failures,updated only in phases 2-3
001205
Number of TCH releases due to radio failures,updated only in phases 12-14
001206
Number of TCH releases due to BSS failures,updated only in phases 12-14
001207
Number of TCH requests rejected due to themismatch between the types of the requestedchannel and the A interface circuit, updated only incall setup phase
001208
Number of TCH releases due to BSC-BSC conflict incall setup
001211
Number of TCH releases due to BSC-BSC conflict for target channel
001212
Number of TCH requests rejected due to lack of resources per BCSU
001216
Drops after DTM CS TCH assignment 001233
DTM CS TCH drops between ASSCOMPL and RFCHREL ACK
001234
. Other counters
Table 8. Other counters
Counter Counter number Average queue length for channel seizure request 001018
Queue denominator 1 001019
Average queue time of call attempts 001020
Queue denominator 2 001021
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Table 8. Other counters (cont.)
Counter Counter number Average queue time of HO attempts 001022
Queue denominator 3 001023
Not relevant 001032
Not relevant 001073
Not relevant 001082
Successful MOC test call 001093
Unsuccessful MOC test call 001094
Average queuing time of urgent HO attempts 001143
Queue denominator 4 001144 Average queuing time of non-urgent HO attempts 001145
Queue denominator 5 001146
Successful AMR codec set downgrades 001185
Unsuccessful AMR codec set downgrades 001186
Successful AMR codec set upgrades 001187
Unsuccessful AMR codec set upgrades 001188
Internal to external HO 001217
Not changed internal HO 001218
. GPRS counters
Table 9. GPRS counters
Counter Counter number GPRS territory upgrade requests 001174
Incompletely served GPRS territory upgrade requests 001175
GPRS upgrade requests rejected due to CSW traffic 001176
GPRS upgrade requests rejected due to lack of PSW 001177
GPRS upgrade requests rejected due to to lack of PCU
001178
GPRS downgrades due to increase in CSW traffic 001179
GPRS upgrades due to decrease in CSW traffic 001180
GPRS territory downgrade requests 001181
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Table 9. GPRS counters (cont.)
Counter Counter number GPRS territory downgrade rejected due to streamingtraffic
001209
GPRS territory downgrade rejected due to need of CS resources.
001210
Number of GPRS territory upgrade requestes fromCSW
001213
Number of GPRS territory upgrade requests fromCSW, partially successful
001214
Number of GPRS territory upgrade requests fromCSW, failed
011215
. Spare counters
Table 10. Spare counters
Counter Counter number Spare001191 001191
Spare001219 001219
Spare001220 001220
Spare001221 001221
Spare001222 001222
Spare001223 001223
Spare001224 001224
Spare001225 001225
Spare001227 001227
Spare001228 001228
Spare001229 001229
Spare001230 001230
Related topics
. Counters of Traffic Measurement
. Signalling charts of Traffic Measurement
. Signalling charts of Dual Transfer Mode
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Instructions
. BSC Statistics Administration
For information on using this measurement to test the activation of relatedsoftware, see the testing instructions in:
. Activating and Testing BSS6071: EFR
. Activating and Testing BSS6115: Half Rate
. Activating and Testing BSS7003 and BSS7037: HSCSD and 14.4 kbit/s Data Services
. Activating and Testing BSS7036: Dynamic SDCCH
.
Activating and Testing BSS9006: GPRS . Activating and Testing BSS10004: AMR
Reference
. BSC Measurement Counters Displaying Program (FOXMEA)
. Performance Measurements
Descriptions
. Advanced Multilayer Handling
. Direct Access to Desired Layer/Band
. Directed Retry in BSC
. Dual Transfer Mode in BSC
. Dynamic Abis
. Dynamic Frequency and Channel Allocation in BSC
. Dynamic SDCCH in Radio Channel Allocation
. (E)GPRS in BSC
. Enhanced Coverage by Frequency Hopping
. Enhanced Speech Codecs: AMR and EFR
. Extended Cell Range
. FACCH Call Set-up
. Half Rate in BSC
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. Handover Support for Coverage Enhancements
. HSCSD and 14.4 kbit/s Data Services in BSC
.
Intelligent Underlay-Overlay. Multi BCF Control in BSC
. Radio Resource Pre-emption and Queuing in BSC
. Traffic Reason Handover in BSC
. Trunk Reservation
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2 Counters of Traffic Measurement
Number
Name
Release
001000
SEIZURE ATTEMPTS
S1
Trigger points See figures:. Basic call with counters. FACCH call setup due to SDCCH congestion with counters. FACCH call setup due to SDCCH congestion, no free TCH channel . SDCCH congestion, FACCH call setup is not activated . Successful SDCCH internal intra-cell handover . Successful SDCCH internal inter-cell handover . Successful SDCCH external handover target . Reconfiguration from TCH to SDCCH
Description Number of times when an MS attempts to seize an SDCCH.
Updated When the RRM receives requests for SDCCH from an MS as the MSneeds a channel for either a call or a HO.
Number
Name
Release
001001
SEIZURE ATTEMPTS WITH BUSY SDCCH
S1
Trigger points See figures:. FACCH call setup due to SDCCH congestion with counters. FACCH call setup because of SDCCH congestion. SDCCH congestion, FACCH call setup is not activated
Description Number of times when an MS attempts to seize an SDCCH but theattempt is unsuccessful because all SDCCHs are busy. This counter does not necessarily mean that the call attempt is lost, because thecall may be established as an FACCH call setup using TCH insteadof SDCCH. This counter is not triggered when the TCHreconfiguration is attempted because of dynamic SDCCH allocation.If the attempt fails, the SDCCH_busy_attempt is triggered together with 1155 UNSUCC_IMM_ASS_SDCCH_ATTEMPT.
Updated When the RRM has no SDCCHs to allocate for a call or HOattempts.
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Number
Name
Release
001002
TRANSACTIONS FAIL DUE TO BSS FAIL
S1
Trigger points See figures:. Unsuccessful SDCCH activation, timer expires while waiting for
CHANNEL_ACTIVATION_ACK message. SDCCH assignment failure. Unsuccessful SDCCH activation, timer expires while waiting for
PHYSICAL_CONTEXT_CONFIRM message. TRX/TSL is blocked with different causes during an SDCCH
channel activation. Unsuccessful SDCCH internal intra-cell handover, timer expires
while waiting for CHANNEL_ACTIVATION_ACK message. Unsuccessful SDCCH external handover, timer expires while
waiting for CLEAR_COMMAND messageDescription Number of SDCCH transactions ended because of a BSS failure.
Updated When one of the counters 001033, 001034, 001035, or 001036 isupdated. This counter represents their sum.
Impact See field descriptions of the counters 001033, 001034, 001035, and001036.
Number
Name
Release
001003
TRANSACTIONS FAIL DUE TO RADIO FAIL
S1Trigger points See figures:
. TCH assignment failure
. Connection failure during SDCCH assignment
Description Number of SDCCH transactions ended because of a radio failure.
Updated When an SDCCH transaction ends because of a radio failure (radiolink timeout) and the RRM releases the SDCCH.
This counter is updated in call phases 1-8 only.
Impact Call cleared
Reason for the impact External / Abis Interface
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Number
Name
Release
001004
TRANSACTIONS FAIL DUE RADIO ON SOURCECHANNEL DURING HO
S1
Trigger points See figure Unsuccessful SDCCH internal inter-cell handover, BTS sends CONNECTION_FAILURE message
Description Number of SDCCH transactions ended because of a radio failure onthe source channel during a handover between SDCCH-SDCCH or SDCCH-TCH.
This counter is updated in call phases 9-11 only.
Updated When an SDCCH transaction ends because of a radio failure (HOfailure) on the source channel during a handover attempt and theRRM releases the SDCCH.
Dependencies with other counters/ PI(s) It is this counter in the source cell that is updated. If the target celllies within the same BSC, also counter 001005 in the target cell isupdated along with this counter.
Impact HO failure and call cleared
Number
Name
Release
001005
TRANSACTIONS FAIL DUE RADIO ON TARGET CHANNELDURING HO
S1
Trigger points See figure Unsuccessful SDCCH internal intra-cell handover,CONNECTION_FAILURE message comes to the target channel during handover
Description Number of SDCCH transactions ended because of a radio failure onthe target channel during an SDCCH HO.
Updated When an SDCCH transaction ends because of a radio failure on thetarget channel during a handover attempt and the RRM releases theSDCCH.
This counter is updated in call phases 12-14 only.
Impact HO failure, the call may possibly be cleared
Reason for the impact Since the MS cannot access the target channel, a radio failureoccurs. The unsuccessful seizure may have been caused by amissing indication of call establishment, missing detection of HO,missing indication of the HO completed, or corrupted messagesrelated to the HO.
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Number
Name
Release
001006
SUCCESS SEIZURE FOR HO
S1
Trigger points See figures:. Successful SDCCH internal intra-cell handover . Successful SDCCH internal inter-cell handover . Successful SDCCH external handover target
Description Number of successful SDCCH seizures for a handover.
Updated When the RRM allocates an SDCCH as a response to an SDCCHrequest in a handover attempt.
Number
Name
Release
001007
SUCCESS SEIZURE FOR IMMEDIATE ASSIGNMENT
S1
Trigger points See figures:. Basic call with counters. Reconfiguration from TCH to SDCCH
Description Number of successful seizures of SDCCH for an immediateassignment.
Updated When the RRM allocates an SDCCH for an immediate assignment ina call attempt.
Number
Name
Release
001008
SUCCESS TCH SEIZURE FOR HO
S1
Trigger points See figures:. Successful internal intra-cell handover . Internal intra-cell HO, successful TCH queuing . Successful internal inter-cell handover . Successful external handover, target
Description Number of successful requests for a TCH in a handover.
Updated When the RRM allocates a TCH as a response to a TCH request ina handover attempt. The channel is reserved by the RRM, but thesuccess of the HO is not known in this phase.
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Number
Name
Release
001009
SUCCESS TCH SEIZURE FOR NORMAL ASSIGNMENT
S1
Trigger points See figures:. Basic call with counters. Basic call with priority subscriber . Successful TCH queuing . Successful forced release. Successful forced handover
Description Number of successful requests for a TCH in a normal assignment.
Updated When the RRM allocates a TCH as a response to a TCH request ina call attempt.
Number
Name
Release
001010
TCH REQUEST SUCCESS AND UNSUCCESS
S1
Trigger points See figures:. Basic call with counters. Basic call with priority subscriber . FACCH call setup due to SDCCH congestion with counters. FACCH call setup because of SDCCH congestion. Basic call, no free TCH and queuing or directed retry is not allowed . Successful TCH queuing . Basic call, no free TCHs, unsuccessful queuing and directed retry
not activated . TCH assignment failure with cause switch_circuit_pool, queuing
and directed retry not allowed . Unsuccessful trunk reservation. Successful internal intra-cell handover . Internal intra-cell HO, successful TCH queuing . Unsuccessful underlay overlay internal intra-cell handover, queuing
not allowed . Internal intra-cell handover, unsuccessful TCH queuing .
Internal directed retry . Successful internal inter-cell handover . Successful external handover, target . Successful forced release. Unsuccessful forced release. Unsuccessful forced release with external handover . Successful forced handover . Unsuccessful forced handover . Unsuccessful forced handover with external handover
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Number
Name
Release
001010
TCH REQUEST SUCCESS AND UNSUCCESS
S1
Description Total number of requests for a TCH (successful and unsuccessful).
Updated When the RRM receives a request for a TCH either in a call or ahandover attempt.
Number
Name
Release
Definition updated
001011
TCH REQUEST REJECTED DUE TO LACK
S1
S11
Trigger points See figures:. Basic call without counters. Basic call, no free TCHs, unsuccessful queuing and directed retry
not activated . TCH assignment failure with cause switch_circuit_pool, queuing
and directed retry not allowed . Unsuccessful underlay overlay internal intra-cell handover, queuing
not allowed . Internal intra-cell handover, unsuccessful TCH queuing . Unsuccessful forced release. Unsuccessful forced release with external handover . Unsuccessful forced handover
Description Number of requests for TCHs that are rejected because there are noradio resources available. This counter is also updated when arequest for TCH is rejected because of a mismatch between thetypes of the requested channel and the A interface circuit.
Updated When the RRM has no TCHs available for either call or HO attemptrequests, or the RRM changes the A interface circuit pool before theTCH allocation. This counter may be updated immediately after aTCH request or, in case of queuing, when the queuing timer expires.
NOTE! In case of DR this counter is updated as follows:
1) When a call is removed from the queue because of a DR attempt,this counter is NOT updated on the SOURCE side, instead counter
001173 is updated.
2) If queuing is not used or the queuing timer expires before a DRattempt, this counter is updated on the SOURCE side.
3) On the TARGET side, this counter is updated in case of congestion (blocking ).
Dependencies with other counters/ PI(s)
See also counter 004079.
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Number
Name
Release
001012
TRANSACTIONS ENDED DUE TO BSS PROBLEM
S1
Trigger points See figures:. Unsuccessful TCH activation, timer expires while waiting for
CHANNEL_ACTIVATION_ACK message. TCH assignment failure, MSC sends CLEAR_COMMAND
message. TRX or TSL is blocked with different causes during a call . Unsuccessful internal intra-cell handover, timer expires while
waiting for CHANNEL_ACTIVATION_ACK message. Unsuccessful external handover, source BSC, timer expires while
waiting for CLEAR_COMMAND message. Unsuccessful external handover, MS sends a handover failure. Dropped call between ASSIGNMENT COMPLETE and
DISCONNECT
Description Number of TCH transactions ended because of BSS problems.
Updated When one of the counters 001045, 001046, 001047, or 001051 isupdated. This counter represents their sum.
Impact See field descriptions of counters 001045, 001046, 001047 and001051.
Number
Name
Release
Definition updated
001013
TRANSACTIONS ENDED DUE RADIO FAIL
S1
S11
Trigger points See figures:. Timer T3107 expires while waiting for ASSIGNMENT_COMPLETE
message. Dropped call between ASSIGNMENT COMPLETE and
DISCONNECT
Description Number of TCH transactions ended because of a radio failure.
Updated When a TCH transaction ends because of a radio failure and theRRM releases the TCH. This counter is typical in connection withcoverage problems.
ERROR INDICATION is sent by the BTS to the BSC in the followingcases:. Sequence error in a received message (the case where
retransmission is not possible).. Timer T200 has expired N200 +1 times (MS doesn't respond any
more).. Unsolicited DM response when link is established.
This counter is updated in call phases 1-8 or 15 only.
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Number
Name
Release
Definition updated
001013
TRANSACTIONS ENDED DUE RADIO FAIL
S1
S11
Impact Call cleared
Number
Name
Release
001014
TRANSACTIONS ENDED DUE SOURCE CHANNEL FAILDURING HO
S1
Trigger points See figure Unsuccessful internal intra-cell handover, timer expires onthe source channel, call cleared
Description Number of TCH transactions ended because of a radio failure on thesource channel during a handover attempt.
This counter is updated in call phases 9-11 only.
Updated When a TCH transaction ends because of a radio failure (HO failure)on the source channel during a handover attempt.
Impact HO failure and call cleared
Number
Name
Release
001015
TRANSACTIONS ENDED DUE TARGET CHANNEL FAILDURING HO
S1
Description A TCH transaction ends because of a radio failure (HO failure) on thetarget channel during a handover attempt.
Updated When a TCH transaction ends because of a radio failure on thetarget channel during a handover attempt.
This counter is updated in call phases 12-14 only.
Impact HO failure, the call may possibly be cleared
Reason for the impact Since the MS cannot access the target channel, a radio failureoccurs. It may be caused by missing indication of call establishment,missing detection of HO, missing indication of the HO completed or corrupted messages related to HO.
Dependencies with other counters/ PI(s)
Counter 1088 is also updated along with this counter if the MS failsto return to the old channel during an inter-BSC handover.
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Number
Name
Release
001016
CALL ATTEMPTS IN THE QUEUE
S1
Trigger points See figures:. Successful TCH queuing . Basic call, no free TCHs, unsuccessful queuing and directed retry
not activated
Description Number of call attempts set in the queue for a TCH.
Updated When the RRM puts a TCH request for call attempt in the queuesince it has no TCHs of the requested kind available.
Dependencies with other counters/ PI(s)
Counter 001010 is updated along with this counter.
Number
Name
Release
001017
HANDOVER ATTEMPTS IN THE QUEUE
S1
Trigger points See figures:. Internal intra-cell HO, successful TCH queuing . Internal intra-cell handover, unsuccessful TCH queuing . Internal directed retry
Description Number of HO attempts set in the queue for a TCH.
Updated When the RRM sets a TCH request for a handover attempt in thequeue since it has no TCHs of the requested kind available.
Dependencies with other counters/ PI(s)
Counter 001010 is updated along with this counter.
Number
Name
Release
001018
AVE QUEUE LENGTH FOR CHANNEL SEIZURE REQUEST
S1
Trigger points See figure Average counter updating
Description Average number of requests for channel seizure in the queue.
Updated Every 20 seconds, as averaging takes place once in themeasurement period. The sample counter is updated when a requestis set in the queue or removed from it. Updated only to normal TRXrecord, not to extended TRX record.
Logical type Average
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Number
Name
Release
001019
QUEUE DENOMINATOR 1
S1
Description Denominator of the average number of requests for channel seizure(always > 0).
Number
Name
Release
001020
AVE QUEUE TIME OF CALL ATTEMPTS
S1
Trigger points See figures:. Successful TCH queuing . Basic call, no free TCHs, unsuccessful queuing and directed retry
not activated
Description The average t ime for which call attempts are kept in the queue (theunit of the value is 10 ms).
Updated The sample counter is updated when a TCH request for a callattempt is removed from the queue (both in a successful andunsuccessful case).
Dependencies with other counters/ PI(s)
In a successful case counters 001009 and 001021 are updated alongwith this counter. In an unsuccessful case counters 001021, 001024and 001060 are updated along with this counter.
Logical type Average
Unit 10 ms
Number
Name
Release
001021
QUEUE DENOMINATOR 2
S1
Trigger points See figures:. Successful TCH queuing . Basic call, no free TCHs, unsuccessful queuing and directed retry
not activated
Description Denominator of the average t ime for which call attempts are kept inthe queue (always > 0).
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Number
Name
Release
001022
AVE QUEUE TIME OF HO ATTEMPTS
S1
Trigger points See figures:. Internal intra-cell HO, successful TCH queuing . Internal intra-cell handover, unsuccessful TCH queuing . Internal directed retry
Description The average time for which HO attempts are kept in the queue. (theunit of the value is 10 ms)
Updated The sample counter is updated when a TCH request for a handover attempt is removed from the queue (both in a successful andunsuccessful case).
Dependencies with other counters/
PI(s)
In a successful case counters 001008 and 001023 are updated along
with this counter. In an unsuccessful case counters 001023, 001025and 001068 are updated along with this counter.
Logical type Average
Unit 10 ms
Number
Name
Release
001023
QUEUE DENOMINATOR 3
S1
Trigger points See figures:. Internal intra-cell HO, successful TCH queuing . Internal intra-cell handover, unsuccessful TCH queuing . Internal directed retry
Description Denominator of the average time for which HO attempts are kept inthe queue (always > 0).
Number
Name
Release
001024
NOT SERVED QUEUED CALL ATTEMPTS
S1
Trigger points See figure Basic call, no free TCHs, unsuccessful queuing and directed retry not activated
Description Number of call attempts in the queue which were not served.
Updated When a call attempt is removed from the queue because a timer expires, or the call attempt is substituted by another attempt of higher priority.
NOTE! This counter is not updated in DR (neither in a successful or unsuccessful DR).
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Number
Name
Release
001024
NOT SERVED QUEUED CALL ATTEMPTS
S1
Dependencies with other counters/ PI(s)
Counters 001020, 001021 and 001060 are updated along with thiscounter.
Number
Name
Release
001025
NOT SERVED QUEUED HO ATTEMPTS
S1
Trigger points See figure Internal intra-cell handover, unsuccessful TCH queuing
Description Number of HO attempts in the queue which were not served.
Updated When a handover attempt is removed from the queue because atimer expires, or the HO attempt is substituted by another attempt of higher priority.
Dependencies with other counters/ PI(s)
Counters 001022, 001023 and 001068 are updated along with thiscounter.
Number
Name
Release
001026
TCH CALL REQ
S2
Trigger points See figures:. Basic call with counters. Basic call with priority subscriber . Successful TCH queuing . Basic call, no free TCHs, unsuccessful queuing and directed retry
not activated . TCH assignment failure with cause switch_circuit_pool, queuing
and directed retry not allowed . Unsuccessful trunk reservation. Internal directed retry . Successful forced release. Unsuccessful forced release. Successful forced handover . Unsuccessful forced handover
Description Number of TCH requests for a normal assignment (both successfuland unsuccessful).
Updated When the RRM receives a TCH request in a call attempt.
Dependencies with other counters/ PI(s)
Counter 001010 is updated along with this counter.
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Number
Name
Release
001027
SDCCH ACT FAIL
S2
Trigger points See figures:. Unsuccessful SDCCH activation. Unsuccessful SDCCH internal intra-cell handover, unsuccessful
channel activation
Description Number of SDCCH transactions that are ended because of a failurein the activation of a channel either during a call or HO attempt.
Updated When either of the counters 001072 and 001074 is updated. Thiscounter represents their sum.
Impact - Call cleared
- HO failure
Reason for the impact External / Abis interface
Number
Name
Release
001028
TCH ACT FAIL
S2
Trigger points See figures:. Unsuccessful TCH activation. Unsuccessful internal inter-cell handover
Description Number of TCH transactions that are ended because of a failure inthe activation of a channel either during a call or HO attempt.
Updated When either of the counters 001081 and 001083 is updated. Thiscounter represents their sum.
Impact - Call cleared
- HO failure
Reason for the impact Abis Interface
Number
NameRelease
001029
TCH TR FAILS2
Trigger points See figure CONNECTION_FAILURE message with causetranscoder_failure during a call
Description Number of TCH transactions that are ended because of a transcoder failure.
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Number
Name
Release
001029
TCH TR FAIL
S2
Updated When a TCH transaction ends because of a transcoder failure duringa call attempt and the RRM releases the TCH. These failures canalso contain situations when the timer T3109 expires in a BSC in callrelease phase while waiting for the Release Indication. The MSsubscriber does not see these failures caused by the T3109 expiryas real drop calls.
This counter is updated in call phases 1-8 or 15 only.
Impact Call cleared
Number
Name
Release
001030
TCH TR FAIL SOURCE
S2
Description Number of TCH transactions that are ended because of a transcoder failure on the source channel during a handover on a TCH.
Updated When a TCH transaction ends because of a transcoder failure on thesource channel during a handover attempt and the RRM releases theTCH. This happens before the RRM receives a message from theMS stating that the HO or assignment is completed.
This counter is updated in call phases 9-11 only.
Impact HO failure and call cleared
Number
Name
Release
001031
TCH TR FAIL TARGET
S2
Trigger points See figure Unsuccessful internal intra-cell handover,CONNECTION_FAILURE message with causeremote_transcoder_failure comes to the target channel
Description Number of TCH transactions that are ended because of a transcoder failure on the target channel during a handover on a TCH.
Updated When a TCH transaction ends because of a transcoder failure on thetarget channel during a handover attempt and the RRM releases theTCH. This happens before the RRM receives a message from theMS stating that the HO or assignment is completed.
This counter is updated in call phases 12-14 only.
Impact HO failure, the call may possibly be cleared
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Number
Name
Release
001032
NOT RELEVANT
S2
Description Not in use
Number
Name
Release
001033
SDCCH ABIS PROBL
S2
Trigger points See figures:. Unsuccessful SDCCH activation, timer expires while waiting for
CHANNEL_ACTIVATION_ACK message. Unsuccessful SDCCH activation, timer expires while waiting for
PHYSICAL_CONTEXT_CONFIRM message. TRX/TSL is blocked with different causes during an SDCCH
channel activation. Unsuccessful SDCCH internal intra-cell handover, timer expires
while waiting for CHANNEL_ACTIVATION_ACK message
Description Number of SDCCH transactions that are ended because of a failurein the Abis interface.
Updated When any of the counters 001075, 001076 and 001077 is updated.This counter represents their sum.
Impact - Call cleared
- HO failure
Reason for the impact External / Abis interface
Number
Name
Release
001034
SDCCH A IF PROBL
S2
Trigger points See figures:. SDCCH assignment failure. Unsuccessful SDCCH external handover, timer expires while
waiting for CLEAR_COMMAND message
Description Number of SDCCH transactions that are ended because of a failurein the A interface.
Updated When any of the counters 001078, 001079, and 001080 is updated.This counter represents their sum.
Impact - Call cleared
- HO failure
Reason for the impact External / A interface
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Number
Name
Release
001038
SDCCH BCSU RESET
S2
Description Number of SDCCH transactions that are ended because of a BCSUrestart.
Updated When an SDCCH transaction ends because of a TRX blocked by aBCSU restart and the RRM releases the SDCCH.
Impact - Call cleared
- HO failure
Reason for the impact BCSU restart
Number
Name
Release
001039
SDCCH NETW ACT
S2
Trigger points See figure TRX/TSL is blocked with different causes during anSDCCH channel activation
Description Number of SDCCH transactions ended because of a reconfigurationof the radio network. (The TRX blocked is in substate blocked by thesystem.)
Updated When an SDCCH transaction ends because of a TRX blocked by afailure which leads to TRX reconfiguration. The failure may occur both during call and HO attempts.
Impact - Call cleared
- HO failure
Reason for the impact See Radio Network Management, Service Block Description, for radio network reconfiguration.
Number
Name
Release
001040
TRUNK RES INVOC
S2
Trigger points See figures:. Successful trunk reservation. Unsuccessful trunk reservation
Description Total number of Trunk Reservation function invocations.
Updated When Trunk Reservation is applied during call setup or handover inRadio Resource Management.
Feature Trunk Reservation
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Number
Name
Release
001041
SUCC TRUNK RES INVOC
S2
Trigger points See figure Successful trunk reservation
Description Number of successful Trunk Reservation function invocations.
Updated When Trunk Reservation allows resources to be allocated in callsetup or handover in Radio Resource Management.
Feature Trunk Reservation
Number
Name
Release
001042
TRUNK RES INVOC RES REFUSED
S2Trigger points See figure Unsuccessful trunk reservation .
Description Number of Trunk Reservation function invocations that result inresource allocation being refused.
Updated When Trunk Reservation denies access and does not allowresources to be allocated in call setup or handover in RadioResource Management.
Feature Trunk Reservation
Number
Name
Release
Definition updated
001043
TCH REQ FACCH CALL SET
S2
S5
Trigger points See figures:. FACCH call setup due to SDCCH congestion with counters. FACCH call setup because of SDCCH congestion
Description Number of TCH requests for FACCH call setup during SDCCHcongestion (both successful and unsuccessful).
Updated When the RRM receives a request for an SDCCH but there are no
SDCCHs idle and a TCH is tried to be allocated as part of theFACCH call setup. It is indicated in the received SDCCH requestwhether a FACCH setup is allowed or not.
Dependencies with other counters/ PI(s)
Counters 001010 and 001098 are updated along with this counter.
Feature BSS5290: FACCH Call Setup because of SDCCH Congestion
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Number
Name
Release
Definition updated
001044
TCH SEIZ FACCH CALL SET
S2
S5
Trigger points See figure FACCH call setup due to SDCCH congestion withcounters
Description Number of successful seizures of TCHs in FACCH call setup.
Updated When the RRM allocates a TCH as a response to an SDCCHrequest as part of the FACCH call setup because of no SDCCHsbeing idle.
Dependencies with other counters/ PI(s)
Counter 001099 is updated along with this counter.
Feature BSS5290: FACCH Call Setup because of SDCCH Congestion
Number
Name
Release
001045
TCH ABIS PROBL
S2
Trigger points See figures:. Unsuccessful TCH activation, timer expires while waiting for
CHANNEL_ACTIVATION_ACK message. TRX or TSL is blocked with different causes during a call . Unsuccessful internal intra-cell handover, timer expires while
waiting for CHANNEL_ACTIVATION_ACK message. Dropped call between ASSIGNMENT COMPLETE and
DISCONNECT
Description Number of TCH transactions that are ended because of a failure inthe Abis interface.
Updated When any of the counters 001084, 001085, and 001086 is updated.This counter represents their sum.
Impact - The call may possibly be cleared
- HO failure
Reason for the impact External / Abis Interface
Number
Name
Release
001046
TCH LAPD FAIL
S2
Trigger points See figure TRX or TSL is blocked with different causes during a call
Description Number of TCH transactions that are ended because of an LAPDfailure. (The TRX blocked is in one of these substates: signalling linkfault or PCM fault.)
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Number
Name
Release
001046
TCH LAPD FAIL
S2
Updated When a TCH transaction ends because of a TRX blocked by anLAPD failure and the RRM releases the TCH.
Impact - Call cleared
- HO failure
Number
Name
Release
001047
TCH BTS FAIL
S2
Trigger points See figure TRX or TSL is blocked with different causes during a call Description Number of TCH transactions that are ended because of a BTS
failure. (The TRX blocked is in one of these substates: FU fault, CUfault, BTS reset, BCF reset, both CU and FU fault, BCF fault.)
Updated When a TCH transaction ends because of a TRX blocked by a BTSfailure and the RRM releases the TCH.
Impact Call cleared
Number
Name
Release
001048
TCH USER ACT
S2
Trigger points See figure TRX or TSL is blocked with different causes during a call
Description Number of TCH transactions that are ended because of user actions.(The TRX/TSL is in substate blocked by the user.)
Updated When the user disconnects a busy TCH by blocking the TSL/TRXwith an MML command. The transaction ends and the TCH isreleased.
Impact - Call cleared
- HO failure
Number
Name
Release
001049
TCH BCSU RESET
S2
Description Number of TCH transactions that are ended because of a BCSUrestart.
Updated When a TCH transaction ends because of a TRX blocked by aBCSU restart and the RRM releases the TCH.
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Number
Name
Release
001049
TCH BCSU RESET
S2
Impact - Call cleared
- HO failure
Reason for the impact BCSU restart
Number
Name
Release
001050
TCH NETW ACT
S2
Trigger points See figure TRX or TSL is blocked with different causes during a call
Description Number of TCH transactions ended because of a reconfiguration of the radio network. (The TRX blocked is in substate blocked by thesystem.)
Updated When a TCH transaction ends because of a TRX blocked by afailure which leads to TRX reconfiguration.
Reason for the impact See Radio Network Management for radio network reconfiguration.
Number
Name
Release
001051
TCH A IF PROBL
S2Trigger points See figures:
. TCH assignment failure, MSC sends CLEAR_COMMANDmessage
. Unsuccessful external handover, source BSC, timer expires whilewaiting for CLEAR_COMMAND message
. Unsuccessful external handover, MS sends a handover failure
Description Number of TCH transactions that are ended because of a failure inthe A interface.
Updated When any of the counters 001087, 001088 and 001089 is updated.This counter represents their sum.
Impact - Call is possibly cleared
- HO failure
Reason for the impact External / A interface
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Number
Name
Release
001052
TRHO REQ
S2
Trigger points See figure Successful traffic reason handover, source
Description Number of HOs because of traffic reasons.
Updated When a handover, under the control of the MSC and because of atraffic reason procedure, is started as a response to theTRAFFIC_REASON_HO_CANDIDATE_ENQUIRY message from the A interface. The counter tells the number of mobiles, determined bythe MSC to be handed over. Updated only to normal TRX record, notto extended TRX record.
Feature Traffic Reason Handover
Number
Name
Release
001053
TRHO ENQUIRIES
S2
Trigger points See figure Successful traffic reason handover, source
Description Number of enquiries about traffic reason HO.
Updated When the RRM starts a handover by sending a message enquiringabout the traffic reason to the Abis interface.
Feature Traffic Reason Handover
Number
Name
Release
001054
FOR REL ASSIGN REQ ATT
S3
Trigger points See figures:. Basic call with priority subscriber . Successful forced release. Unsuccessful forced release
Description Number of call at tempt requests capable of doing a forced releasefor a call in progress.
Updated When the RRM receives a TCH request for a call attempt which iscapable of doing a forced release for a call in progress.
Dependencies with other counters/ PI(s)
Counter 001010 is updated along with this counter.
Feature Queuing and Priority
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Number
Name
Release
001055
FOR HO ASSIGN REQ ATT
S3
Trigger points See figures:. Basic call with priority subscriber . Successful forced handover . Unsuccessful forced handover
Description Number of call attempt requests capable of doing a forced HO for acall in progress.
Updated When the RRM receives a TCH request for a call attempt which iscapable of doing a forced HO for a call in progress.
Dependencies with other counters/ PI(s)
Counter 001010 is updated along with this counter.
Feature Queuing and Priority
Number
Name
Release
001056
QUE ALL ASSIGN REQ ATT
S3
Trigger points See figures:. Basic call with counters. Successful TCH queuing . Basic call, no free TCHs, unsuccessful queuing and directed retry
not activated . Unsuccessful trunk reservation
Description Number of requests for a call attempt with queuing allowed.
Updated When the RRM receives a TCH request for a call attempt which isallowed to queue for channels.
Dependencies with other counters/ PI(s)
Counter 001010 is updated along with this counter.
Feature Queuing and Priority
Number Name
Release
001057QUE NALL ASSIGN REQ ATT
S3
Trigger points See figures:. Basic call with counters. Basic call, no free TCH and queuing or directed retry is not allowed . TCH assignment failure with cause switch_circuit_pool, queuing
and directed retry not allowed . Unsuccessful trunk reservation
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Number
Name
Release
001057
QUE NALL ASSIGN REQ ATT
S3
Description Number of requests for a call attempt with queuing not allowed.
Updated When the RRM receives a TCH request for a call attempt which isnot allowed to queue for channels.
Dependencies with other counters/ PI(s)
Counter 001010 is updated along with this counter.
Feature Queuing and Priority
Number
Name
Release
001058
FOR REL ASSIGN REQ FAIL
S3
Trigger points See figure Unsuccessful forced release
Description Number of rejected call attempt requests capable of doing a forcedrelease for a call in progress.
Updated When the RRM rejects a TCH request for a call attempt which iscapable of doing a forced release for a call in progress. The highpriority TCH request is rejected because of lack of a suitable call for release or because pre-emption software is not in use in the BSC.
Dependencies with other counters/ PI(s)
Counters 001011 and 001141 are updated along with this counter.
Feature Queuing and Priority
Reason for the impact There is no suitable call for release in the cell or the pre-emptionsoftware is not in use in the BSC.
Number
Name
Release
001059
FOR HO ASSIGN REQ FAIL
S3
Trigger points See figure Unsuccessful forced handover
Description Number of rejected call attempt requests capable of doing a forcedHO for a call in progress.
Updated When the RRM rejects a TCH request for a call attempt which iscapable of doing a forced handover for a call in progress. The highpriority TCH request is rejected because of a lack of suitable calls for a forced handover or because the pre-emption software is not in usein the BSC.
Dependencies with other counters/ PI(s)
Counters 001011 and 001141 are updated along with this counter.
Feature Queuing and Priority
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Number
Name
Release
001059
FOR HO ASSIGN REQ FAIL
S3
Reason for the impact There is no suitable call for a forced handover in the cell or the pre-emption software is not in use in the BSC.
Number
Name
Release
001060
QUE ALL ASSIGN REQ FAIL
S3
Trigger points See figures:. Basic call, no free TCHs, unsuccessful queuing and directed retry
not activated . Unsuccessful trunk reservation
Description Number of rejected call at tempt requests with queuing allowed.
Updated When the RRM rejects a TCH request for a call attempt which isallowed to queue.
Dependencies with other counters/ PI(s)
Counters 001011 and 001141 are updated along with this counter.
Feature Queuing and Priority
Reason for the impact This may be because of queuing is not allowed in the BTS, or therequest is removed from the queue because of expiry of a timer, or the request is replaced by a request with higher priority.
Number
Name
Release
001061
QUE NALL ASSIGN REQ FAIL
S3
Trigger points See figures:. Basic call, no free TCH and queuing or directed retry is not allowed . TCH assignment failure with cause switch_circuit_pool, queuing
and directed retry not allowed . Unsuccessful trunk reservation
Description Number of rejected call at tempt requests with queuing not allowed.Updated When the RRM rejects a TCH request for a call attempt which is not
allowed to queue.
Dependencies with other counters/ PI(s)
Counters 001011 and 001141 are updated along with this counter.
Feature Queuing and Priority
Reason for the impact There are no radio resources available.
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Number
Name
Release
001062
FOR REL HO REQ ATT
S3
Trigger points See figure Unsuccessful forced release with external handover
Description Number of requests for a handover capable of doing a forced releasefor a call in progress.
Updated When the RRM receives a TCH request for a handover attemptwhich is capable of doing a forced release for a call in progress.
Dependencies with other counters/ PI(s)
Counter 001010 is updated along with this counter.
Feature Queuing and Priority
Number
Name
Release
001063
FOR HO HO REQ ATT
S3
Trigger points See figure Unsuccessful forced handover with external handover
Description Number of requests for a handover capable of doing a forced HO for a call in progress.
Updated When the RRM receives a TCH request for a handover attemptwhich is capable of doing a forced HO for a call in progress.
Dependencies with other counters/ PI(s)
Counter 001010 is updated along with this counter.
Feature Queuing and Priority
Number
Name
Release
001064
QUE ALL HO REQ ATT
S3
Trigger points See figures:. Successful internal intra-cell handover . Internal intra-cell HO, successful TCH queuing .
Internal intra-cell handover, unsuccessful TCH queuing . Internal directed retry . Successful internal inter-cell handover . Successful external handover, target
Description Number of requests for a handover with queuing allowed.
Updated When the RRM receives a TCH request for a handover attemptwhich is allowed to queue for radio resources.
Dependencies with other counters/ PI(s)
Counter 001010 is updated along with this counter.
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Number
Name
Release
001064
QUE ALL HO REQ ATT
S3
Feature Queuing and Priority
Number
Name
Release
001065
QUE NALL HO REQ ATT
S3
Trigger points See figures:. Successful internal intra-cell handover . Unsuccessful underlay overlay internal intra-cell handover, queuing
not allowed . Successful internal inter-cell handover . Successful external handover, target
Description Number of requests for HO with queuing not allowed.
Updated When the RRM receives a TCH request for a handover attemptwhich is not allowed to queue for radio resources.
Dependencies with other counters/ PI(s)
Counter 001010 is updated along with this counter.
Feature Queuing and Priority
Number
Name
Release
001066
FOR REL HO REQ FAIL
S3
Trigger points See figure Unsuccessful forced release with external handover
Description Number of rejected requests for a handover capable of doing aforced release for a call in progress.
Updated When the RRM rejects a TCH request for a handover attempt whichis capable of doing a forced release for a call in progress. The highpriority TCH request is rejected because of a lack of suitable calls for release or because the pre-emption software is not in use in the
BSC.Dependencies with other counters/ PI(s)
Counter 001011 is updated along with this counter.
Feature Queuing and Priority
Reason for the impact There is no suitable call for release in the cell or the pre-emptionsoftware is not in use in BSC.
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Number
Name
Release
001067
FOR HO HO REQ FAIL
S3
Trigger points See figure Unsuccessful forced handover with external handover
Description Number of rejected requests for a handover capable of doing aforced HO for a call in progress.
Updated When the RRM rejects a TCH request for a handover attempt whichis capable of doing a forced handover for a call in progress. The highpriority TCH request is rejected because of a lack of suitable calls for a forced handover or because the pre-emption software is not in usein the BSC.
Dependencies with other counters/ PI(s)
Counter 001011 is updated along with this counter.
Feature Queuing and Priority
Reason for the impact There is no suitable call for a forced handover in the cell or the pre-emption software is not in use in the BSC.
Number
Name
Release
001068
QUE ALL HO REQ FAIL
S3
Trigger points See figure Internal intra-cell handover, unsuccessful TCH queuing
Description Number of the rejected requests for a handover with queuing
allowed.Updated When the RRM rejects a TCH request for a handover attempt which
is allowed to queue.
Dependencies with other counters/ PI(s)
Counter 001011 is updated along with this counter.
Feature Queuing and Priority
Reason for the impact This may be because queuing is not allowed in the BTS, or therequest is removed from the queue because of expiry of a timer, or the request is replaced by another with higher priority.
Number
Name
Release
001069
QUE NALL HO REQ FAIL
S3
Trigger points See figure Unsuccessful underlay overlay internal intra-cell handover,queuing not allowed
Description Number of rejected requests for a handover with queuing notallowed.
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Number
Name
Release
001069
QUE NALL HO REQ FAIL
S3
Updated When the RRM rejects a TCH request for a handover attempt whichis not allowed to queue.
Dependencies with other counters/ PI(s)
Counter 001011 is updated along with this counter.
Feature Queuing and Priority
Reason for the impact There are no radio resources available.
Number
Name
Release
001070
FORCED RELEASES
S3
Trigger points See figure Successful forced release
Description Number of forced releases.
Updated When the RRM starts to terminate a call in progress forcefully bysending a release request to the Abis interface.
Feature Queuing and Priority
Number
NameRelease
001071
FORCED HANDOVERSS3
Trigger points See figure Successful forced handover
Description Number of forced HOs.
Updated When the RRM receives an acknowledgement from the Handover Attempt Supervisor of the Abis interface to its request for a forcedHO.
Feature Queuing and Priority
Number Name
Release
001072SDCCH ACT FAIL CALL
S3
Trigger points See figure Unsuccessful SDCCH activation
Description Number of SDCCH transactions that are ended because of a failurein the activation of a channel during a call.
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Number
Name
Release
001075
SDCCH ABIS FAIL CALL
S3
Trigger points See figures:. Unsuccessful SDCCH activation, timer expires while waiting for
CHANNEL_ACTIVATION_ACK message. Unsuccessful SDCCH activation, timer expires while waiting for
PHYSICAL_CONTEXT_CONFIRM message. TRX/TSL is blocked with different causes during an SDCCH
channel activation
Description Number of SDCCH transactions that are ended because of a failurein the Abis interface during a call in progress. There is noacknowledgement of channel activation, no indication of callestablishment received, i.e., ghosts.
Updated When an SDCCH transaction ends because of signalling problems inthe Abis interface and the RRM releases the SDCCH.
This counter is updated in call phases 1-8 only.
Reasons that trigger the counter:
Phantom RACHs that have a valid establihment cause.
The BTS can hear the MS, but the MS cannot hear the BTS, and sothe MS does not respond to the IMMEDIATE ASSIGNMENTmessage with a SABM.
MS is accessing the network at the limit of sensitivity and messagesare lost.
Poor Radio conditions.MS is accessing network through another BTS (co-channel, co-BSICinterference).
Impact Call cleared
Reason for the impact External / Abis interface
Number
Name
Release
001076
SDCCH ABIS FAIL SOURCE
S3
Description Number of SDCCH transactions that are ended because of a failurein the Abis interface on the source channel during SDCCH-SDCCHor SDCCH-TCH HO.
Updated When an SDCCH transaction ends because of a failure in the Abisinterface on the source channel during a handover and the RRMreleases the SDCCH.
This counter is updated in call phases 9-11 only.
Feature SDCCH Handover, Directed retry
Impact HO failure and call cleared
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Number
Name
Release
001076
SDCCH ABIS FAIL SOURCE
S3
Reason for the impact External / Abis interface.
Number
Name
Release
001077
SDCCH ABIS FAIL TARGET
S3
Trigger points See figure Unsuccessful SDCCH internal intra-cell handover, timer expires while waiting for CHANNEL_ACTIVATION_ACK message
Description Number of SDCCH transactions that are ended because of a failurein the Abis interface on the target channel during a handover.
Updated When an SDCCH transaction ends because of a failure in the Abisinterface on the target channel during a handover and the RRMreleases the SDCCH.
This counter is updated in call phases 12-14 only.
Feature SDCCH Handover
Impact HO failure and possibly call cleared
Reason for the impact External / Abis interface
Number
Name
Release
001078
SDCCH A IF FAIL CALL
S3
Trigger points See figure SDCCH assignment failure
Description Number of SDCCH transactions ended because of a failure in the Ainterface during a call attempt.
Updated When an SDCCH transaction ends because of signalling problems inthe A interface during a call attempt and the RRM releases theSDCCH.
This counter is updated in call phases 1-8 only.
Impact Call clearedReason for the impact External / A interface.
There may be a failure in the SDCCH signalling connection.
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Number
Name
Release
001079
SDCCH A IF FAIL SOURCE
S3
Trigger points See figure Unsuccessful SDCCH external handover, timer expireswhile waiting for CLEAR_COMMAND message
Description Number of SDCCH transactions ended because of a failure in the Ainterface on the source channel during an SDCCH-SDCCH or SDCCH-TCH HO.
Updated When an SDCCH transaction ends because of signalling problems inthe A interface during an SDCCH-SDCCH or SDCCH-TCH HO andthe RRM releases the SDCCH.
This counter is updated in call phases 9-11 only.
Feature SDCCH Handover, Directed retry
Impact HO failure and call cleared
Reason for the impact External / A interface.
There may be a failure in the SDCCH signalling connection.
Number
Name
Release
001080
SDCCH A IF FAIL TARGET
S3
Trigger points See figure Unsuccessful SDCCH external handover, timer expireswhile waiting for CLEAR_COMMAND message
Description Number of SDCCH transactions ended because of a failure in the Ainterface on the target channel during an SDCCH HO.
Updated When an SDCCH transaction ends because of signalling problems inthe A interface during an SDCCH HO and the RRM releases theSDCCH.
This counter is updated in call phases 12-14 only.
Feature SDCCH Handover
Impact HO failure and call cleared
Reason for the impact External / A interface.
There may be a failure in the SDCCH signalling connection.
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Number
Name
Release
001084
TCH ABIS FAIL CALL
S3
Description Number of TCH transactions ended because of a failure in the Abisinterface during a call in progress.
Updated When a TCH transaction ends because of signalling problems in the Abis interface and the RRM releases the TCH.
This counter is updated in call phases 1-8 or 15 only.
Impact Call cleared
Reason for the impact External / Abis Interface
The signalling problems may include missing acknowledgement of channel activation, missing indication of call establishment, receipt of an error indication, corrupted messages, missing measurement
results from the BTS, excessive timing advance or some internalreasons. These failures can also contain situations when the timer T3109 expires in a BSC in call release phase while waiting for theRelease Indication. The MS subscriber does not see these failurescaused by the T3109 expiry as real drop calls.
Number
Name
Release
001085
TCH ABIS FAIL SOURCE
S3
Description Number of TCH transactions ended because of a failure in the Abis
interface on the source channel during a TCH HO.Updated When a TCH transaction ends because of a failure in the Abis
interface on the source channel during a TCH HO and the RRMreleases the TCH.
This counter is updated in call phases 9-11 only.
Impact HO failure and call cleared
Reason for the impact External / Abis Interface
Number
NameRelease
001086
TCH ABIS FAIL NEW S3
Trigger points See figure Unsuccessful internal intra-cell handover, timer expireswhile waiting for CHANNEL_ACTIVATION_ACK message
Description Number of TCH transactions ended because of a failure in the Abisinterface on the new channel during a TCH handover.
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Number
Name
Release
001086
TCH ABIS FAIL NEW
S3
Updated When a TCH transaction ends because of a failure in the Abisinterface on the new channel during a TCH handover and the RRMreleases the TCH.
This counter is updated in call phases 12-14 only.
Impact HO failure and possibly call cleared
Reason for the impact External / Abis Interface
Number
Name
Release
001087
TCH A IF FAIL CALL
S3
Trigger points See figure TCH assignment failure, MSC sends CLEAR_COMMANDmessage
Description Number of TCH transactions ended because of a failure in the Ainterface during a call in progress.
Updated When a TCH transaction ends because of signalling problems in the A interface during a call and the RRM releases the TCH.
This counter is updated in call phases 1-8 or 15 only.
Impact Call cleared
Reason for the impact External / A interface.The signalling problems may include the CLEAR_COMMANDmessage from the MSC during the call setup phase before the MSCreceives an indication of the completion of the assignment from theMS and the ABNORMAL_CLEAR_ RECEIVED_DUE_TO_A_ INTERFACE message (reset circuit, SCCP cleared by RLSD).
Number
Name
Release
001088
TCH A IF FAIL SOURCE
S3
Trigger points See figure Unsuccessful external handover, source BSC, timer expires while waiting for CLEAR_COMMAND message
Description Number of TCH transactions ended because of a failure in the Ainterface on the source channel during a handover attempt.
Updated When a TCH transaction ends because of an A interface failure (HOfailure) on the source channel during a TCH HO attempt and theRRM releases the TCH.
This counter is updated in call phases 9-11 only.
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Number
Name
Release
001088
TCH A IF FAIL SOURCE
S3
Dependencies with other counters/ PI(s)
This counter is updated in the source cell. If the target cell lies withinthe same BSC, also counter 001015 in the target cell is updatedalong with this counter.
This counter is also updated if the MS fails to return to the oldchannel during an inter-BSC handover.
Impact HO failure and call cleared
Reason for the impact External / A interface
Number
NameRelease
001089
TCH A IF FAIL NEW S3
Trigger points See figure Unsuccessful external handover, MS sends a handover failure
Description Number of TCH transactions ended because of a failure in the Ainterface on the new channel during a handover attempt.
Updated When a TCH transaction ends because of a failure in the A interface(HO failure) on the new channel during a handover attempt and theRRM releases the TCH.
This counter is updated in call phases 12-14 only.
Impact HO failure, the call may possibly be cleared
Reason for the impact External / A interface
Number
Name
Release
001090
TCH REQ UND OVER
S4
Trigger points See figures:. Successful internal intra-cell handover . Internal intra-cell HO, successful TCH queuing . Unsuccessful underlay overlay internal intra-cell handover, queuing
not allowed . Internal directed retry . Successful internal inter-cell handover
Description Number of TCH requests for an underlay overlay HO. Updated onlyto normal TRX record, not to extended TRX record.
Updated When the RRM receives a TCH request for an underlay overlay HO.
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Number
Name
Release
001090
TCH REQ UND OVER
S4
Dependencies with other counters/ PI(s)
Counter 001010 is updated along with this counter.
Feature BSC4016: Intelligent Underlay Overlay
Number
Name
Release
001091
TCH SEIZ UND OVER
S4
Trigger points See figures:. Successful internal intra-cell handover . Internal intra-cell HO, successful TCH queuing . Successful internal inter-cell handover
Description Number of TCH seizures for an underlay overlay HO.
Updated When the RRM allocates a TCH as a response to a TCH request for an underlay overlay HO. Updated only to normal TRX record, not toextended TRX record.
Dependencies with other counters/ PI(s)
Counter 001008 is updated along with this counter.
Feature BSC4016: Intelligent Underlay Overlay
Number
Name
Release
001092
TCH REJ REQ UND OVE
S4
Trigger points See figure Unsuccessful underlay overlay internal intra-cell handover,queuing not allowed
Description Number of TCH requests for an underlay overlay HO rejectedbecause of a lack of resources.
Updated When the RRM rejects a TCH request for an underlay overlay HObecause of lack of resources. Updated only to normal TRX record,
not to extended TRX record.
Dependencies with other counters/ PI(s)
Counter 001011 is updated along with this counter.
Feature BSC4016: Intelligent Underlay Overlay
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Number
Name
Release
001093
SUCC MOC TEST CALL
S4
Description Number of successful MOC test calls during a scheduled test.
Updated When the RRM receives a message from the BTTEST.
Feature BSC4531: BTS Testing:Scheduled MOC
Number
Name
Release
001094
FAIL MOC TEST CALL
S4
Description Number of unsuccessful MOC test calls during a scheduled test.
Updated When the RRM receives a message from the BTTEST.
Dependencies with other counters/ PI(s)
BSC4531: BTS Testing: Scheduled MOC
Number
Name
Release
001095
PRI SUBSCR TCH REQ
S5
Trigger points See figures:. Basic call with priority subscriber . Unsuccessful forced release. Unsuccessful forced release with external handover . Unsuccessful forced handover . Unsuccessful forced handover with external handover
Description Number of TCH requests of the type priority subscriber
Updated When the RRM receives a TCH request either in a call or HOattempt and the MS priority level in the priority information element(PIE) indicates that the MS is a priority subscriber.
Dependencies with other counters/ PI(s)
Counter 001010 is updated along with this counter.
Feature BSS5190: Enhanced Trunk Reservation
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Number
Name
Release
001096
PRI SUBSCR SUCC TCH SEIZ
S5
Trigger points See figure Basic call with priority subscriber
Description Number of successful TCH seizures of the type priority subscriber.
Updated When the RRM allocates a TCH as a response to a TCH request ineither a call or HO attempt and the MS priority level in the priorityinformation element (PIE) indicates that the MS is a prioritysubscriber.
Dependencies with other counters/ PI(s)
Counter 001008 or 001009 is updated along with this counter.
Feature BSS5190: Enhanced Trunk Reservation
Number
Name
Release
001097
NO PRI SUBSCR REFUSED TCH REQ
S5
Trigger points See figure Unsuccessful trunk reservation
Description Number of TCH requests of the type non-priority subscriber that arerejected because there are no resources available to subscribersother than priority subscribers.
Updated When the RRM rejects a TCH request because of no resourcesavailable to subscribers other than priority subscribers.
Dependencies with other counters/ PI(s)
Counter 001042 is updated along with this counter.
Feature BSS5190: Enhanced Trunk Reservation
Number
Name
Release
001098
TCH SEIZ ATT DUE SDCCH CON
S5
Trigger points See figures:. FACCH call setup due to SDCCH congestion with counters. FACCH call setup because of SDCCH congestion
Description Number of attempts to seize a TCH because of SDCCH congestion.
Updated When the RRM attempts to allocate a TCH as a response to arequest for an SDCCH seizure during SDCCH congestion. The RRMdoes this if the TCH allocation (=FACCH setup) is allowed in themessage carrying the request for the SDCCH seizure.
Dependencies with other counters/ PI(s)
Counters 001010 and 001043 are updated along with this counter.
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Number
Name
Release
001098
TCH SEIZ ATT DUE SDCCH CON
S5
Feature BSS5290: FACCH Call Setup because of SDCCH Congestion
Number
Name
Release
001099
TCH SEIZ DUE SDCCH CON
S5
Trigger points See figure FACCH call setup due to SDCCH congestion withcounters
Description Number of successful TCH seizures because of congestion on theSDCCH.
Updated When the RRM allocates a TCH as a response to a request for SDCCH seizure during congestion on the SDCCHs. The RRMallocates a TCH if the TCH allocation (=FACCH setup) is allowed inthe message carrying the request for the SDCCH seizure.
Dependencies with other counters/ PI(s)
This counter is updated along with counter 001044.
Feature BSS5290: FACCH Call Setup because of SDCCH Congestion
Number
NameRelease
001100
TRUNK TCH REJECTED FR REQS5
Trigger points See figure Unsuccessful trunk reservation
Description Number of requests for trunk reservation function that result in therejection of TCH allocation when FR or preferred FR TCH has beenrequested.
Updated When the RRM denies access by applying the trunk reservationfunction and FR or preferred FR TCH has been requested.
Dependencies with other counters/ PI(s)
Counter 001042 is updated along with this counter.
Feature BSS5010: Half Rate and BSS5190 Enhanced Trunk Reservation
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Number
Name
Release
001101
TRUNK TCH REJECTED HR REQ
S5
Trigger points See figure Unsuccessful trunk reservation
Description Number of requests for trunk reservation function that result inrejection of TCH allocation when HR or preferred HR TCH has beenrequested.
Updated When the RRM denies access by applying the trunk reservationfunction and HR or preferred HR TCH has been requested.
Dependencies with other counters/ PI(s)
Counter 001042 is updated along with this counter.
Feature BSS5010: Half Rate and BSS5190 Enhanced Trunk Reservation
Number
Name
Release
001102
FULL TCH REQ SUCC UNSUCC
S5
Trigger points See figures:. Basic call with counters. Basic call with priority subscriber . Basic call, no free TCH and queuing or directed retry is not allowed . Successful TCH queuing . Basic call, no free TCHs, unsuccessful queuing and directed retry
not activated . Unsuccessful trunk reservation. Successful internal intra-cell handover . Internal intra-cell HO, successful TCH queuing . Unsuccessful underlay overlay internal intra-cell handover, queuing
not allowed . Internal intra-cell handover, unsuccessful TCH queuing . Internal directed retry . Successful internal inter-cell handover . Successful external handover, target . Successful forced release.
Unsuccessful forced release. Unsuccessful forced release with external handover . Successful forced handover . Unsuccessful forced handover . Unsuccessful forced handover with external handover
Description Number of requests for FR TCH (both successful and unsuccessful).
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Number
Name
Release
001103
HALF TCH REQ SUCC UNSUCC
S5
Updated When the RRM receives a TCH request either in a call or HOattempt and HR TCH channel is requested.
NOTE! This counter is updated when the channel rate of therequested TCH is defined to be HR only; the type of the TCH may belimited either by an assignment request or a handover request fromthe A interface, or it may be because of the BSC restricting theselection of channel type in TCH allocation.
Dependencies with other counters/ PI(s)
Counter 001010 is updated along with this counter.
Feature BSS5010: Half Rate
Number
Name
Release
001104
TCH REQ FULL PREFERRED
S5
Trigger points See figures:. Basic call with counters. Basic call with priority subscriber . Basic call, no free TCH and queuing or directed retry is not allowed . Successful TCH queuing . Basic call, no free TCHs, unsuccessful queuing and directed retry
not activated . TCH assignment failure with cause switch_circuit_pool, queuing
and directed retry not allowed . Unsuccessful trunk reservation. Successful internal intra-cell handover . Internal intra-cell HO, successful TCH queuing . Unsuccessful underlay overlay internal intra-cell handover, queuing
not allowed . Internal intra-cell handover, unsuccessful TCH queuing . Internal directed retry . Successful internal inter-cell handover .
Successful external handover, target . Successful forced release. Unsuccessful forced release. Unsuccessful forced release with external handover . Successful forced handover . Unsuccessful forced handover . Unsuccessful forced handover with external handover
Description Number of TCH requests with FR preferred (both successful andunsuccessful).
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Number
Name
Release
001104
TCH REQ FULL PREFERRED
S5
Updated When the RRM receives a TCH request either in a call or HOattempt and FR or HR TCH channel is requested alternatively withFR preferred.
NOTE! The preferred channel rate can be defined either by anassignment request or HO request received from the A interface or by software which is activated on the BSC for controlling theselection of the channel type in TCH allocation. In the latter case thepreferred channel type can be quite the opposite to the one initiallyset by the MSC.
Dependencies with other counters/ PI(s)
Counter 001010 is updated along with this counter.
Feature BSS5010: Half Rate
Number
Name
Release
001105
TCH REQ HALF PREFERRED
S5
Trigger points See figures:. Basic call with counters. Basic call with priority subscriber . Basic call, no free TCH and queuing or directed retry is not allowed .
Successful TCH queuing . Basic call, no free TCHs, unsuccessful queuing and directed retry
not activated . TCH assignment failure with cause switch_circuit_pool, queuing
and directed retry not allowed . Unsuccessful trunk reservation. Successful internal intra-cell handover . Internal intra-cell HO, successful TCH queuing . Unsuccessful underlay overlay internal intra-cell handover, queuing
not allowed . Internal intra-cell handover, unsuccessful TCH queuing . Internal directed retry . Successful internal inter-cell handover . Successful external handover, target . Successful forced release. Unsuccessful forced release. Unsuccessful forced release with external handover . Successful forced handover . Unsuccessful forced handover . Unsuccessful forced handover with external handover
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Number
Name
Release
001105
TCH REQ HALF PREFERRED
S5
Description Number of TCH requests with HR preferred (both successful andunsuccessful).
Updated When the RRM receives a TCH request either in a call or HOattempt and FR or HR TCH channel is requested alternatively withHR preferred.
NOTE! The preferred channel rate can be defined either byassignment request or HO request received from the A interface or by softwares which are activated on the BSC for controlling theselection of the channel type in TCH allocation. In the latter case thepreferred channel type can be quite the opposite to the one initiallyset by the MSC.
Dependencies with other counters/ PI(s)
Counter 001010 is updated along with this counter.
Feature BSS5010: Half Rate
Number
Name
Release
001106
SUCC FULL TCH SEIZ
S5
Trigger points See figures:. Basic call with counters.
Basic call with priority subscriber . Successful TCH queuing . Successful internal intra-cell handover . Internal intra-cell HO, successful TCH queuing . Successful internal inter-cell handover . Successful external handover, target . Successful forced release. Successful forced handover
Description Number of successful FR TCH seizures.
Updated When the RRM allocates an FR TCH as a response to a TCHrequest.
Dependencies with other counters/ PI(s)
Either counter 001008 or counter 001009 is updated along with thiscounter.
Feature BSS5010: Half Rate
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Number
Name
Release
001107
SUCC HALF TCH SEIZ
S5
Trigger points See figures:. Basic call with counters. Basic call with priority subscriber . Successful TCH queuing . Successful internal intra-cell handover . Internal intra-cell HO, successful TCH queuing . Successful internal inter-cell handover . Successful external handover, target . Successful forced release. Successful forced handover
Description Number of successful HR TCH seizures.
Updated When the RRM allocates an HR TCH as a response to a TCHrequest.
Dependencies with other counters/ PI(s)
Either counter 001008 or counter 001009 is updated along with thiscounter.
Feature BSS5010: Half Rate
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Number
Name
Release
001108
FULL TCH SEIZ SPEECH VER 1
S5
Trigger points See figures:. Normal release. Unsuccessful TCH activation. Unsuccessful TCH activation, timer expires while waiting for
CHANNEL_ACTIVATION_ACK message. TCH assignment failure. TCH assignment failure, MSC sends CLEAR_COMMAND
message. CONNECTION_FAILURE message with cause transcoder_failure
during a call . TRX or TSL is blocked with different causes during a call . Unsuccessful internal intra-cell handover, timer expires while
waiting for CHANNEL_ACTIVATION_ACK message. Unsuccessful internal intra-cell handover,
CONNECTION_FAILURE message with causeremote_transcoder_failure comes to the target channel
. Unsuccessful internal intra-cell handover, timer expires on thesource channel, call cleared
. Unsuccessful internal inter-cell handover
. Successful external handover, source
. Unsuccessful external handover, source BSC, timer expires whilewaiting for CLEAR_COMMAND message
. Unsuccessful external handover, MS sends a handover failure
. Successful forced release
. Timer T3107 expires while waiting for ASSIGNMENT_COMPLETE message
. Dropped call between ASSIGNMENT COMPLETE and DISCONNECT
. Dropped call between ASSIGNMENT COMPLETE and RF CHANNEL RELEASE ACK
Description Number of successful FR TCH seizures when speech FR version 1is in use.
Updated When an FR TCH allocated for speech is released and the FR codecversion 1 is in use.
Feature BSS5010: Half Rate
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Number
Name
Release
001109
FULL TCH SEIZ SPEECH VER 2
S5
Trigger points See figures:. Normal release. Unsuccessful TCH activation. Unsuccessful TCH activation, timer expires while waiting for
CHANNEL_ACTIVATION_ACK message. TCH assignment failure. TCH assignment failure, MSC sends CLEAR_COMMAND
message. CONNECTION_FAILURE message with cause transcoder_failure
during a call . TRX or TSL is blocked with different causes during a call . Unsuccessful internal intra-cell handover, timer expires while
waiting for CHANNEL_ACTIVATION_ACK message. Unsuccessful internal intra-cell handover,
CONNECTION_FAILURE message with causeremote_transcoder_failure comes to the target channel
. Unsuccessful internal intra-cell handover, timer expires on thesource channel, call cleared
. Unsuccessful internal inter-cell handover
. Successful external handover, source
. Unsuccessful external handover, source BSC, timer expires whilewaiting for CLEAR_COMMAND message
. Unsuccessful external handover, MS sends a handover failure
. Successful forced release
. Timer T3107 expires while waiting for ASSIGNMENT_COMPLETE message
. Dropped call between ASSIGNMENT COMPLETE and DISCONNECT
. Dropped call between ASSIGNMENT COMPLETE and RF CHANNEL RELEASE ACK
Description Number of successful FR TCH seizures when speech FR version 2is in use.
Updated When an FR TCH allocated for speech is released and the FR codecversion 2 is in use.
Feature BSS5010: Half Rate
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Number
Name
Release
001110
FULL TCH SEIZ SPEECH VER 3
S5
Trigger points See figures:. Normal release. Unsuccessful TCH activation. Unsuccessful TCH activation, timer expires while waiting for
CHANNEL_ACTIVATION_ACK message. TCH assignment failure. TCH assignment failure, MSC sends CLEAR_COMMAND
message. CONNECTION_FAILURE message with cause transcoder_failure
during a call . TRX or TSL is blocked with different causes during a call . Unsuccessful internal intra-cell handover, timer expires while
waiting for CHANNEL_ACTIVATION_ACK message. Unsuccessful internal intra-cell handover,
CONNECTION_FAILURE message with causeremote_transcoder_failure comes to the target channel
. Unsuccessful internal intra-cell handover, timer expires on thesource channel, call cleared
. Unsuccessful internal inter-cell handover
. Successful external handover, source
. Unsuccessful external handover, source BSC, timer expires whilewaiting for CLEAR_COMMAND message
. Unsuccessful external handover, MS sends a handover failure
. Successful forced release
. Timer T3107 expires while waiting for ASSIGNMENT_COMPLETE message
. Dropped call between ASSIGNMENT COMPLETE and DISCONNECT
. Dropped call between ASSIGNMENT COMPLETE and RF CHANNEL RELEASE ACK
Description Number of successful FR TCH seizures when speech FR version 3is in use.
Updated When an FR TCH allocated for speech is released and the FR codecversion 3 is in use.
Feature BSS5010: Half Rate
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Number
Name
Release
001111
HALF TCH SEIZ SPEECH VER 1
S5
Trigger points See figures:. Normal release. Unsuccessful TCH activation. Unsuccessful TCH activation, timer expires while waiting for
CHANNEL_ACTIVATION_ACK message. TCH assignment failure. TCH assignment failure, MSC sends CLEAR_COMMAND
message. CONNECTION_FAILURE message with cause transcoder_failure
during a call . TRX or TSL is blocked with different causes during a call . Unsuccessful internal intra-cell handover, timer expires while
waiting for CHANNEL_ACTIVATION_ACK message. Unsuccessful internal intra-cell handover,
CONNECTION_FAILURE message with causeremote_transcoder_failure comes to the target channel
. Unsuccessful internal intra-cell handover, timer expires on thesource channel, call cleared
. Unsuccessful internal inter-cell handover
. Successful external handover, source
. Unsuccessful external handover, source BSC, timer expires whilewaiting for CLEAR_COMMAND message
. Unsuccessful external handover, MS sends a handover failure
. Successful forced release
. Timer T3107 expires while waiting for ASSIGNMENT_COMPLETE message
. Dropped call between ASSIGNMENT COMPLETE and DISCONNECT
. Dropped call between ASSIGNMENT COMPLETE and RF CHANNEL RELEASE ACK
Description Number of successful HR TCH seizures when speech FR version 1is in use.
Updated When an HR TCH allocated for speech is released and the HRcodec version 1 is in use.
Feature BSS5010: Half Rate
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Number
Name
Release
001112
HALF TCH SEIZ SPEECH VER 2
S5
Trigger points See figures:. Normal release. Unsuccessful TCH activation. Unsuccessful TCH activation, timer expires while waiting for
CHANNEL_ACTIVATION_ACK message. TCH assignment failure. TCH assignment failure, MSC sends CLEAR_COMMAND
message. CONNECTION_FAILURE message with cause transcoder_failure
during a call . TRX or TSL is blocked with different causes during a call . Unsuccessful internal intra-cell handover, timer expires while
waiting for CHANNEL_ACTIVATION_ACK message. Unsuccessful internal intra-cell handover,
CONNECTION_FAILURE message with causeremote_transcoder_failure comes to the target channel
. Unsuccessful internal intra-cell handover, timer expires on thesource channel, call cleared
. Unsuccessful internal inter-cell handover
. Successful external handover, source
. Unsuccessful external handover, source BSC, timer expires whilewaiting for CLEAR_COMMAND message
. Unsuccessful external handover, MS sends a handover failure
. Successful forced release
. Timer T3107 expires while waiting for ASSIGNMENT_COMPLETE message
. Dropped call between ASSIGNMENT COMPLETE and DISCONNECT
. Dropped call between ASSIGNMENT COMPLETE and RF CHANNEL RELEASE ACK
Description Number of successful HR TCH seizures when speech FR version 2is in use.
Updated When an HR TCH allocated for speech is released and the HRcodec version 2 is in use.
Feature BSS5010: Half Rate
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Number
Name
Release
001113
HALF TCH SEIZ SPEECH VER 3
S5
Trigger points See figures:. Normal release. Unsuccessful TCH activation. Unsuccessful TCH activation, timer expires while waiting for
CHANNEL_ACTIVATION_ACK message. TCH assignment failure. TCH assignment failure, MSC sends CLEAR_COMMAND
message. CONNECTION_FAILURE message with cause transcoder_failure
during a call . TRX or TSL is blocked with different causes during a call . Unsuccessful internal intra-cell handover, timer expires while
waiting for CHANNEL_ACTIVATION_ACK message. Unsuccessful internal intra-cell handover,
CONNECTION_FAILURE message with causeremote_transcoder_failure comes to the target channel
. Unsuccessful internal intra-cell handover, timer expires on thesource channel, call cleared
. Unsuccessful internal inter-cell handover
. Successful external handover, source
. Unsuccessful external handover, source BSC, timer expires whilewaiting for CLEAR_COMMAND message
. Unsuccessful external handover, MS sends a handover failure
. Successful forced release
. Timer T3107 expires while waiting for ASSIGNMENT_COMPLETE message
. Dropped call between ASSIGNMENT COMPLETE and DISCONNECT
. Dropped call between ASSIGNMENT COMPLETE and RF CHANNEL RELEASE ACK
Description Number of successful HR TCH seizures when speech FR version 3is in use.
Updated When an HR TCH allocated for speech is released and the HRcodec version 3 is in use.
Feature BSS5010: Half Rate
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Number
Name
Release
001114
FULL TCH SEIZ NORM ASSIGNMENT
S5
Trigger points See figures:. Basic call with counters. Basic call with priority subscriber . Successful TCH queuing . Successful forced release. Successful forced handover
Description Number of successful FR TCH seizures for a normal assignment.
Updated When the RRM allocates an FR TCH as a response to a TCHrequest in a call attempt.
Dependencies with other counters/ PI(s)
Counter 001009 is updated along with this counter.
Feature BSS5010: Half Rate
Number
Name
Release
001115
HALF TCH SEIZ NORM ASSIGNMENT
S5
Trigger points See figures:. Basic call with counters. Basic call with priority subscriber . Successful TCH queuing . Successful forced release. Successful forced handover
Description Number of successful HR TCH seizures for a normal assignment.
Updated When the RRM allocates an HR TCH as a response to a TCHrequest in a call attempt.
Dependencies with other counters/ PI(s)
Counter 001009 is updated along with this counter.
Feature BSS5010: Half Rate
Number
Name
Release
001116
FULL TCH SEIZ INT HO CH RATE
S5
Trigger points See figures:. Successful internal intra-cell handover . Internal intra-cell HO, successful TCH queuing . Successful internal inter-cell handover
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Number
Name
Release
001116
FULL TCH SEIZ INT HO CH RATE
S5
Description Number of successful FR TCH seizures for an internal HO when thechannel rate changes.
Updated When the RRM allocates an FR TCH for an internal HO as aresponse to a TCH request and the channel rate is changed from HRto FR.
Dependencies with other counters/ PI(s)
Counters 001008 and 001106 are updated along with this counter.
Feature BSS5010: Half Rate
Number Name
Release
001117HALF TCH SEIZ INT HO CH RATE
S5
Trigger points See figures:. Successful internal intra-cell handover . Internal intra-cell HO, successful TCH queuing . Successful internal inter-cell handover
Description Number of successful HR TCH seizures for an internal HO when thechannel rate changes.
Updated When the RRM allocates an HR TCH for an internal HO as a
response to a TCH request and the channel rate is changed from FRto HR.
Dependencies with other counters/ PI(s)
Counters 001008 and 001107 are updated along with this counter.
Feature BSS5010: Half Rate
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Number
Name
Release
001119
REJ TCH REQ DUE LACK HR
S5
Description Number of TCH requests that are rejected because of a lack of resources, when HR or preferred HR TCH is requested.
Updated When no TCHs are available when requested from the RRM either ina call or HO attempt and either HR or preferred HR TCH wasrequested. The counter may be updated immediately after the TCHrequest or, in case of queuing after the queuing, timer expires.
Dependencies with other counters/ PI(s)
Counter 001011 is updated along with this counter.
Feature BSS5010: Half Rate
Number
Name
Release
001120
FULL TCH REJ DUE HR TRAF
S5
Trigger points See figures:. FACCH call setup due to SDCCH congestion, no free TCH channel . Basic call, no free TCH and queuing or directed retry is not allowed . Successful TCH queuing . Basic call, no free TCHs, unsuccessful queuing and directed retry
not activated . Unsuccessful trunk reservation. Internal intra-cell HO, successful TCH queuing . Unsuccessful underlay overlay internal intra-cell handover, queuing
not allowed . Internal intra-cell handover, unsuccessful TCH queuing . Successful forced release. Unsuccessful forced release. Unsuccessful forced release with external handover . Successful forced handover . Unsuccessful forced handover . Unsuccessful forced handover with external handover
Description Number of requests for FR TCHs that are rejected because of HRtraffic, whether queuing occurred or not.
Updated When no FR TCH is available in a situation where HR calls are beingmaintained in DR TSLs and there are free HR TCHs among the DRor permanent HR resources for at least two HR calls.
NOTE! The counter is incremented on receipt of the request for theFR TCH, regardless of whether the request is set in the queue, pre-empted, subjected to directed retry or some other procedure of thekind.
Feature BSS5010: Half Rate
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Number
Name
Release
001122
TCH REJ DUE REQ CH A IF CRC
S5
Feature BSS5010 Half Rate
Number
Name
Release
001123
FULL TCH REQ FACCH CALL
S5
Trigger points See figures:. FACCH call setup due to SDCCH congestion with counters. FACCH call setup due to SDCCH congestion, no free TCH channel
Description Number of requests for FR TCH in FACCH call setup during SDCCHcongestion (both successful and unsuccessful).
Updated When the RRM receives a request for SDCCH allocation but no idleSDCCHs exist and TCH allocation (=FACCH call setup) is allowed inthe request which also indicates that the TCH rate should be FR.
Dependencies with other counters/ PI(s)
Counters 001010, 001043 and 001098 are updated along with thiscounter.
Feature BSS5010: Half Rate
Number
Name
Release
001124
TCH FACCH CALL CH RATE NOT DEF
S5
Trigger points See figures:. FACCH call setup due to SDCCH congestion with counters. FACCH call setup due to SDCCH congestion, no free TCH channel
Description Number of requests for TCHs in FACCH call setup during SDCCHcongestion when the TCH rate is not defined to be uniquely FR or HR (both successful and unsuccessful).
Updated When the RRM receives a request for SDCCH allocation but no idleSDCCHs exist and TCH allocation (=FACCH call setup) is allowed in
the request which also indicates that either of the two possiblechannel rates is accepted to be allocated.
Dependencies with other counters/ PI(s)
Counters 001010, 001043 and 001098 are updated along with thiscounter.
Feature BSS5010: Half Rate
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Number
Name
Release
001125
SUCC FULL TCH SEIZ FACCH CALL
S5
Trigger points See figure FACCH call setup due to SDCCH congestion withcounters
Description Number of successful FR TCHs seizures for a FACCH call setup.
Updated When the RRM allocates an FR TCH as a response to an SDCCHrequest as part of the FACCH call setup during SDCCH congestion.
Dependencies with other counters/ PI(s)
Counter 001044 is updated along with this counter.
Feature BSS5010 Half Rate
Number
Name
Release
001126
SUCC HALF TCH SEIZ FACCH CALL
S5
Trigger points See figure FACCH call setup due to SDCCH congestion withcounters
Description Number of successful HR TCHs seizures for a FACCH call setup.
Updated When the RRM allocates an HR TCH as a response to an SDCCHrequest as part of the FACCH call setup during SDCCH congestion.
Dependencies with other counters/ PI(s)
Counter 001044 is updated along with this counter.
Feature BSS5010: Half Rate
Number
Name
Release
001127
ENDED DUE TRANSC FR RATE 1
S5
Trigger points See figures:. CONNECTION_FAILURE message with cause transcoder_failure
during a call . Unsuccessful internal intra-cell handover,
CONNECTION_FAILURE message with causeremote_transcoder_failure comes to the target channel
Description Number of radio TCH transactions that are ended because of atranscoder failure when speech FR version 1 is in use.
Updated When one of the transcoder failure counters 001029, 001030 or 001031 is updated and the FR codec version 1 is in use.
Feature BSS5010: Half Rate
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Number
Name
Release
001128
ENDED DUE TRANSC FR RATE 2
S5
Trigger points See figures:. CONNECTION_FAILURE message with cause transcoder_failure
during a call . Unsuccessful internal intra-cell handover,
CONNECTION_FAILURE message with causeremote_transcoder_failure comes to the target channel
Description Number of radio TCH transactions that are ended because of atranscoder failure when speech FR version 2 is in use.
Updated When one of the transcoder failure counters 001029, 001030 or 001031 is updated and the FR codec version 2 is in use.
Feature BSS5010: Half Rate
Number
Name
Release
001129
ENDED DUE TRANSC FR RATE 3
S5
Trigger points See figures:. CONNECTION_FAILURE message with cause transcoder_failure
during a call . Unsuccessful internal intra-cell handover,
CONNECTION_FAILURE message with cause
remote_transcoder_failure comes to the target channel Description Number of radio TCH transactions that are ended because of a
transcoder failure when speech FR version 3 is in use.
Updated When one of the transcoder failure counters 001029, 001030 or 001031 is updated and the FR codec version 3 is in use.
Feature BSS5010: Half Rate
Number
Name
Release
001130
ENDED DUE TRANSC HR RATE 1
S5Trigger points See figures:
. CONNECTION_FAILURE message with cause transcoder_failureduring a call
. Unsuccessful internal intra-cell handover,CONNECTION_FAILURE message with causeremote_transcoder_failure comes to the target channel
Description Number of radio TCH transactions that are ended because of atranscoder failure when speech HR version 1 is in use.
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Number
Name
Release
001130
ENDED DUE TRANSC HR RATE 1
S5
Updated When one of the transcoder failure counters 001029, 001030, or 001031 is updated and the HR codec version 1 is in use.
Feature BSS5010: Half Rate
Number
Name
Release
001131
ENDED DUE TRANSC HR RATE 2
S5
Trigger points See figures:. CONNECTION_FAILURE message with cause transcoder_failure
during a call . Unsuccessful internal intra-cell handover,
CONNECTION_FAILURE message with causeremote_transcoder_failure comes to the target channel
Description Number of radio TCH transactions that are ended because of atranscoder failure when speech HR version 2 is in use.
Updated When one of the transcoder failure counters 001029, 001030 or 001031 is updated and the HR codec version 2 is in use.
Feature BSS5010: Half Rate
Number
Name
Release
001132
ENDED DUE TRANSC HR RATE 3
S5Trigger Points See figures:
. CONNECTION_FAILURE message with cause transcoder_failureduring a call
. Unsuccessful internal intra-cell handover, CONNECTION_FAILURE message with cause remote_transcoder_failure comes to the target channel
Description Number of radio TCH transactions that are ended because of a
transcoder failure when speech HR version 3 is in use.
Updated When one of the transcoder failure counters 001029, 001030 or 001031 is updated and the HR codec version 3 is in use.
Feature BSS5010: Half Rate
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Number
Name
Release
001133
FULL TCH TR FAIL
S5
Trigger points See figures:. Unsuccessful TCH activation. Unsuccessful TCH activation, timer expires while waiting for
CHANNEL_ACTIVATION_ACK message. TCH assignment failure. TCH assignment failure, MSC sends CLEAR_COMMAND
message. CONNECTION_FAILURE message with cause transcoder_failure
during a call . TRX or TSL is blocked with different causes during a call . Unsuccessful internal intra-cell handover, timer expires while
waiting for CHANNEL_ACTIVATION_ACK message. Unsuccessful internal intra-cell handover,
CONNECTION_FAILURE message with causeremote_transcoder_failure comes to the target channel
. Unsuccessful internal intra-cell handover, timer expires on thesource channel, call cleared
. Unsuccessful internal inter-cell handover
. Unsuccessful external handover, source BSC, timer expires whilewaiting for CLEAR_COMMAND message
. Unsuccessful external handover, MS sends a handover failure
. Timer T3107 expires while waiting for ASSIGNMENT_COMPLETE message
Description Total number of FR TCH transaction failures.
Updated When an FR TCH transaction ends because of any abnormal reason,that is, some specific failure counter has been updated, and the RRMreleases the FR TCH.
Feature BSS5010: Half Rate
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Number
Name
Release
001134
HALF TCH TR FAIL
S5
Trigger points See figures:. Unsuccessful TCH activation. Unsuccessful TCH activation, timer expires while waiting for
CHANNEL_ACTIVATION_ACK message. TCH assignment failure. TCH assignment failure, MSC sends CLEAR_COMMAND
message. CONNECTION_FAILURE message with cause transcoder_failure
during a call . TRX or TSL is blocked with different causes during a call . Unsuccessful internal intra-cell handover, timer expires while
waiting for CHANNEL_ACTIVATION_ACK message. Unsuccessful internal intra-cell handover,
CONNECTION_FAILURE message with causeremote_transcoder_failure comes to the target channel
. Unsuccessful internal intra-cell handover, timer expires on thesource channel, call cleared
. Unsuccessful internal inter-cell handover
. Unsuccessful external handover, source BSC, timer expires whilewaiting for CLEAR_COMMAND message
. Unsuccessful external handover, MS sends a handover failure
. Timer T3107 expires while waiting for ASSIGNMENT_COMPLETE message
Description Total number of HR TCH transaction failures.
Updated When an HR TCH transaction ends because of any abnormalreason, that is, some specific failure counter has been updated, andthe RRM releases the HR TCH.
Feature BSS5010: Half Rate
Number
Name
Release
001135
SDCCH SEIZ ATT FOR MOC
S6
Trigger points See figures:. Basic call with counters. FACCH call setup due to SDCCH congestion with counters. FACCH call setup due to SDCCH congestion, no free TCH channel . SDCCH congestion, FACCH call setup is not activated . Successful SDCCH internal intra-cell handover . Successful SDCCH internal inter-cell handover . Reconfiguration from TCH to SDCCH
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Number
Name
Release
001135
SDCCH SEIZ ATT FOR MOC
S6
Description Number of SDCCH seizure attempts for an MOC. In case of anexternal handover and handovers after external handover thiscounter is not incremented. In case of an intra-cell or inter-cell(SDCCH to SDCCH) handover this counter is updated.
Updated When the RRM receives a request for a SDCCH from an MSbecause the MS needs a channel for a MOC. Note that this counter contains all requests for an SDCCH in originating direction, for example Mobile Originating calls, Location Updates, SupplementaryService requests and SMS on SDCCH. In case of an SMS thiscounter is triggered even if the SMS would eventually be sent onTCH instead of SDCCH.
Dependencies with other counters/ PI(s)
Counter 001000 is updated along with this counter.
Number
Name
Release
001136
SDCCH SEIZ ATT FOR MTC
S6
Trigger points See figures:. Basic call with counters. FACCH call setup due to SDCCH congestion with counters. FACCH call setup due to SDCCH congestion, no free TCH channel . SDCCH congestion, FACCH call setup is not activated . Successful SDCCH internal intra-cell handover . Successful SDCCH internal inter-cell handover . Reconfiguration from TCH to SDCCH
Description Number of SDCCH seizure attempts for an MTC. In case of anexternal handover and handovers after external handover thiscounter is not incremented. In case of an intra-cell or inter-cell(SDCCH to SDCCH) handover this counter is updated.
Updated When the RRM receives a request for a SDCCH from an MS as theMS needs a channel for a MTC. Note that this counter contains allrequests for an SDCCH in terminating direction, for example Mobile
Terminating calls and SMS on SDCCH. In case of an SMS thiscounter is triggered even if the SMS would eventually be sent onTCH instead of SDCCH.
Dependencies with other counters/ PI(s)
Counter 001000 is updated along with this counter.
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Number
Name
Release
001137
TCH SEIZ ATT FOR MOC
S6
Trigger points See figures:. Basic call with counters. Basic call with priority subscriber . FACCH call setup due to SDCCH congestion with counters. FACCH call setup due to SDCCH congestion, no free TCH channel . Basic call, no free TCH and queuing or directed retry is not allowed . Successful TCH queuing . Basic call, no free TCHs, unsuccessful queuing and directed retry
not activated . TCH assignment failure with cause switch_circuit_pool, queuing
and directed retry not allowed . Unsuccessful trunk reservation. Successful internal intra-cell handover . Internal intra-cell HO, successful TCH queuing . Unsuccessful underlay overlay internal intra-cell handover, queuing
not allowed . Internal intra-cell handover, unsuccessful TCH queuing . Internal directed retry . Successful internal inter-cell handover . Successful forced release. Unsuccessful forced release. Successful forced handover . Unsuccessful forced handover
Description Number of TCH seizure attempts during an MOC, in call setup phasebefore connection acknowledgement. In case of an externalhandover and handovers after external handover this counter is notincremented. In case of an intra-cell or inter-cell (TCH to TCH or SDCCH to TCH) handover this counter is updated.
Updated When RRM receives requests for a TCH for an MOC. In FACCH callsetup RRM attempts to allocate a TCH as a response to a requestfor an SDCCH seizure during SDCCH congestion.
Dependencies with other counters/ PI(s)
Counter 001010 is updated along with this counter.
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Number
Name
Release
001138
TCH SEIZ ATT FOR MTC
S6
Trigger points See figures:. Basic call with counters. Basic call with priority subscriber . FACCH call setup due to SDCCH congestion with counters. FACCH call setup due to SDCCH congestion, no free TCH channel . Basic call, no free TCH and queuing or directed retry is not allowed . Successful TCH queuing . Basic call, no free TCHs, unsuccessful queuing and directed retry
not activated . TCH assignment failure with cause switch_circuit_pool, queuing
and directed retry not allowed . Unsuccessful trunk reservation. Successful internal intra-cell handover . Internal intra-cell HO, successful TCH queuing . Unsuccessful underlay overlay internal intra-cell handover, queuing
not allowed . Internal intra-cell handover, unsuccessful TCH queuing . Internal directed retry . Successful internal inter-cell handover . Successful forced release. Unsuccessful forced release. Successful forced handover . Unsuccessful forced handover
Description Number of TCH seizure attempts during an MTC, in call setup phasebefore connection acknowledgement. In case of an externalhandover and handovers after external handover this counter is notincremented. In case of an intra-cell or inter-cell (TCH to TCH or SDCCH to TCH) handover this counter is updated.
Updated When RRM receives requests for a TCH for an MTC. In FACCH callsetup RRM attempts to allocate a TCH as a response to a requestfor an SDCCH seizure during SDCCH congestion.
Dependencies with other counters/ PI(s)
Counter 001010 is updated along with this counter.
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Number
Name
Release
001139
TCH REL because of RADIO FAIL
S6
Trigger points See figure Timer T3107 expires while waiting for ASSIGNMENT_COMPLETE message
Description Number of TCH releases because of radio failures, in call setupphase before connection acknowledgement. This counter is alsoupdated in an intra-cell or inter-cell handover, if the TCH is releasedbecause of a radio failure before the conversation phase (handover is started and it fails before a connection acknowledgement messageis received).
Updated When a TCH is released because of a radio failure.
This counter is updated in call phases 2, 3, 5, or 8-14 only.
Dependencies with other counters/ PI(s)
Counter 001013 is updated along with this counter.
Number
Name
Release
001140
TCH REL DUE TO BSS FAIL
S6
Trigger points See figures:. Unsuccessful TCH activation, timer expires while waiting for
CHANNEL_ACTIVATION_ACK message. TCH assignment failure, MSC sends CLEAR_COMMAND
messageDescription Number of TCH releases because of BSS failures, in call setup
phase before connection acknowledgement. This counter is alsoupdated in intra-cell or inter-cell handover, if the TCH is releasedbecause of BSS problems before conversation phase (handover isstarted and fails before connection acknowledgement message isreceived).
Updated When a TCH is released because of BSS problems.
This counter is updated in call phases 2, 3, 5, or 8-14 only.
Dependencies with other counters/ PI(s)
Counter 001012 is updated along with this counter.
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Number
Name
Release
001141
TCH SEIZ FAILS DUE TO CONG
S6
Trigger points See figures:. FACCH call setup due to SDCCH congestion, no free TCH channel . Basic call, no free TCH and queuing or directed retry is not allowed . Basic call, no free TCHs, unsuccessful queuing and directed retry
not activated . TCH assignment failure with cause switch_circuit_pool, queuing
and directed retry not allowed . Unsuccessful forced release. Unsuccessful forced handover
Description Number of TCH seizure failures because of congestion during callsetup before connection acknowledgement. This counter is alsoupdated in intra-cell or inter-cell handover, if the TCH attempt failsbecause of congestion before conversation phase (handover isstarted and fails before connection acknowledgement message isreceived). In case of an external handover and handovers after external handover this counter is not incremented.
Updated When RRM rejects a TCH request because of congestion.
This counter is updated in call phases 2, 3, 5, or 8 only.
Dependencies with other counters/ PI(s)
Counter 001011 is updated along with this counter.
Number Name
Release
001142QUEUED URGENT HANDOVER ATTEMPTS
S6
Trigger points See figures:. Internal intra-cell HO, successful TCH queuing . Internal intra-cell handover, unsuccessful TCH queuing
Description Number of queued urgent handover attempts.
Updated When a TCH request for an urgent handover attempt is put to thequeue because of a lack of available TCH resources requested.
Dependencies with other counters/ PI(s) Counters 001010 and 001064 are updated along with this counter.
Feature BSS6115: Radio Channel Allocation Enhancements
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Number
Name
Release
001143
AVE QUE TIME OF URGENT HO ATTEMPTS
S6
Trigger points See figures:. Internal intra-cell HO, successful TCH queuing . Internal intra-cell handover, unsuccessful TCH queuing
Description Numerator of average queuing time of queued urgent handover attempts (unit of the value is 10 ms).
Updated When a TCH request for an urgent handover attempt is removedfrom the queue (both in a successful and an unsuccessful case).
Dependencies with other counters/ PI(s)
In a successful case counters 001008, 001022 and 001144 areupdated along with this counter. In an unsuccessful case counters001022, 001025, 001068 and 001144 are updated along with thiscounter.
Feature BSS6115: Radio Channel Allocation Enhancements
Logical type Average
Unit 10 ms
Number
Name
Release
001144
QUE DENOMINATOR 4
S6
Trigger points See figures:. Internal intra-cell HO, successful TCH queuing . Internal intra-cell handover, unsuccessful TCH queuing
Description Denominator of average queuing time of queued urgent handover attempts.
Updated Every 20 seconds. The averaging is made within the measurementperiod.
Dependencies with other counters/ PI(s)
Counter 001143 is updated along with this counter.
Feature BSS6115: Radio Channel Allocation Enhancements
Number
Name
Release
001145
AVE QUE TIME OF NON URGENT HO ATTEMPTS
S6
Trigger points See figures:. Internal intra-cell HO, successful TCH queuing . Internal intra-cell handover, unsuccessful TCH queuing
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Number
Name
Release
001145
AVE QUE TIME OF NON URGENT HO ATTEMPTS
S6
Description Numerator of average queuing time of queued non-urgent handover attempts.
Updated When a TCH request for a non-urgent HO attempt is removed fromthe queue (both in a successful and unsuccessful case).
Dependencies with other counters/ PI(s)
In a successful case counters 001008, 001022 and 001146 areupdated along with this counter. In an unsuccessful case counters001022, 001025, 001068 and 001146 are updated along with thiscounter.
Feature BSS6115: Radio Channel Allocation Enhancements
Logical type Average
Number
Name
Release
001146
QUE DENOMINATOR 5
S6
Trigger points See figures:. Internal intra-cell HO, successful TCH queuing . Internal intra-cell handover, unsuccessful TCH queuing
Description Denominator of average queuing time of queued urgent HO attempts(unit of the value is 10 ms).
Updated Every 20 seconds. The averaging is made with the measurementperiod.
Dependencies with other counters/ PI(s)
Counter 001145 is updated along with this counter.
Feature BSS6115: Radio Channel Allocation Enhancements
Unit 10 ms
Number
Name
Release
001147
QUEUED URG HO ATTS NOT SERVED
S6
Trigger points See figure Internal intra-cell handover, unsuccessful TCH queuing
Description Number of queued urgent handover attempts not served.
Updated When the urgent HO attempt is removed from the queue because of queuing timer expiry or substitution by a higher priority queuing item.
Dependencies with other counters/ PI(s)
Counters 001022, 001025, 001068 and 001143 are updated alongwith this counter.
Feature BSS6115 Radio Channel Allocation Enhancements
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Number
Name
Release
001148
MS SUCC TCH SEIZURE FOR ASSIGNMENT COMPLETE
S7
Trigger points See figure Normal call
Description Number of times when a MS is successfully on the TCH after an ASSIGNMENT_COMPLETE message.
Updated When anASSIGNMENT_COMPLETE message is received from theMS via BTS to TCH. The TCH is reserved and the MS is moved fromthe SDCCH to the TCH. This counter is updated only when a call isestablished for the first time, not during handovers.
This counter is not updated with softwares FACCH call setupbecause of SDCCH congestion, directed retry procedure in BSC,TCH assignment to super reuse TRX in IUO and direct access tosuper re-use TRX in IUO.
Number
Name
Release
Definition updated
001149
CALLS ENDED BY USER DURING DADL/B SETUP
S7
S11.5
Description Number of CALLS RELEASED BY USER in a call setup phaseduring DADL/B handover.
Updated When the user releases the call in call setup phase and BSC hasstarted to evaluate the potential target cells for DADL/B handover.
Number
Name
Release
Definition updated
001150
SUCC TCH SEIZ WHEN GOOD QUAL IN ADJACENTS
S8
S12
Description This counter is no longer in use.
Updated Not updated
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Number
Name
Release
Definition updated
001151
TCH REQ REJ DUE TO BAD QUALITY IN ADJACENT
S8
S12
Description This counter is no longer in use.
Updated Not updated
Number
Name
Release
Definition updated
001152
SUCC TCH SEIZ WHEN QUAL BETW GOOD AND BAD INADJACENT
S8
S12Description This counter is no longer in use.
Updated Not updated
Number
Name
Release
Definition updated
001153
TCH REQ REJ WHEN QUAL BETW GOOD AND BAD INADJACENT
S8
S12
Description This counter is no longer in use.
Updated Not updated
Number
Name
Release
001154
DYNAMIC SDCCH RECONFIGURATION ATTEMPT
S7
Trigger points See figure Reconfiguration from TCH to SDCCH
Description Number of SDCCH reconfiguration attempts for immediate
assignment.Updated When a SDCCH channel is needed for an immediate assignment
and no free SDCCHs are available and the request is sent for reconfiguring a TCH channel to a SDCCH channel. This counter isnot updated if reconfiguration is done from SDCCH to TCH channel.
Dependencies with other counters/ PI(s)
Counters 001000 and 001007 are updated along with this counter.
Feature BSS7036 Dynamic SDCCH allocation
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Number
Name
Release
001155
UNSUCC IMM ASS SDCCH ATTEMPT
S7
Trigger points See figure FACCH call setup due to SDCCH congestion withcounters
Description Number of unsuccessful SDCCH allocation attempts for immediateassignment.
Updated When the SDCCH channel allocation does not succeed because of alack of SDCCH resources at the time of the immediate assignment.When SDCCH is released with the dx-cause rtsl_reconf_fail_c.
Triggered for example when a dynamic SDCCH allocation (1154DYNAMIC_SDCCH_RECONFIGURATION_ATTEMPT) is tried but itfails. Failure can be caused for example by the following situations.. In the BCSU there cannot be more SDCCH allocated.. All TCHs are busy and cannot be reallocated.. RRM has reconfigured a TCH to SDCCH but ABI cannot do the
same. In this case the dynamic SDCCH seized by RRM is releasedwith cause rtsl_reconf_fail and the call attempt fails (blocking).
Dependencies with other counters/ PI(s)
Counter 001001 is updated along with this counter.
Feature BSS7036: Dynamic SDCCH allocation
Number
NameRelease
001156
HSCSD TCH REQ WITH 14,4S7
Trigger points See figures:. Mobile originated HSCSD call setup. Successful internal inter-cell handover for HSCSD, target cell
allocations and activations for three channels
Description Number of TCH requests for 14.4 kbit/s data.
NOTE! Despite its name, this counter is not related to High SpeedCirciuit Switched Data (HSCSD), but the single slot 14.4 kbit/s dataservices.
Updated When the RRM receives a TCH request for a single slot 14.4 kbit/sdata connection in a call or a handover attempt.
Dependencies with other counters/ PI(s)
Counters for a TCH request.
Feature BSS7037: 14.4 kbit/s data services
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Number
Name
Release
001157
HSCSD SUCC TCH SEIZ WITH 14,4
S7
Trigger points See figures:. Mobile originated HSCSD call setup. Successful internal inter-cell handover for HSCSD, target cell
allocations and activations for three channels
Description Number of successful TCH seizures for 14.4 kbit/s data.
NOTE! Despite of its name, this counter is not related to High SpeedCirciuit Switched Data (HSCSD), but the single slot 14.4 kbit/s dataservices.
Updated When the RRM allocates a TCH/F as a response to a single slot14.4 kbit/s request in a call or handover attempt.
Dependencies with other counters/ PI(s)
Counters for a successful TCH seizures.
Feature BSS7037: 14.4 kbit/s data services
Number
Name
Release
001158
HSCSD TRANSP TCH REQ
S7
Trigger points See figures:. Mobile originated HSCSD call setup. Successful internal inter-cell handover for HSCSD, target cell
allocations and activations for three channels
Description Number of transparent HSCSD TCH requests.
Updated When TCH/F(s) is / are requested for a transparent HSCSD servicefrom the RRM in a call or a handover attempt.
Dependencies with other counters/ PI(s)
Counter 001160 or 001161 is updated along with this counter.
Feature BSS7003: High speed circuit switched data
Number
Name
Release
001159
HSCSD SUCC TRANSP TCH SEIZ
S7
Trigger points See figures:. Mobile originated HSCSD call setup. Successful internal inter-cell handover for HSCSD, target cell
allocations and activations for three channels
Description Number of successful transparent HSCSD TCH seizures.
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Number
Name
Release
001159
HSCSD SUCC TRANSP TCH SEIZ
S7
Updated When TCH/F has been successfully allocated for transparent HSCSDservice by RRM. Incrementation is made only by the HSCSD mainchannel allocation.
Dependencies with other counters/ PI(s)
Counter 001162 or 001163 is updated along with this counter.
Feature BSS7003: High speed circuit switched data
Number
Name
Release
001160
HSCSD REQ FOR CALL SETUP
S7
Trigger points See figure Mobile originated HSCSD call setup
Description Number of HSCSD TCH requests for a call set-up.
Updated When the HSCSD data connection is requested from the RRM in acall attempt.
Dependencies with other counters/ PI(s)
Counter 001010 is updated along with this counter.
Feature BSS7003: High speed circuit switched data
Number
Name
Release
001161
HSCSD TCH REQ FOR HO
S7
Trigger points See figure Successful internal inter-cell handover for HSCSD, target cell allocations and activations for three channels
Description Number of HSCSD TCH requests for a HO.
Updated When the HSCSD data connection is requested from the RRM in ahandover attempt.
Dependencies with other counters/ PI(s)
Counter 001010 is updated along with this counter.
Feature BSS7003: High speed circuit switched data
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Number
Name
Release
001162
HSCSD SUCC TCH SEIZ FOR CALL SETUP
S7
Trigger points See figure Mobile originated HSCSD call setup
Description Number of successful HSCSD TCH seizures for a call set-up.
Updated When the RRM allocates a main HSCSD TCH/F as a response to anHSCSD call attempt.
Dependencies with other counters/ PI(s)
Counter 001009 is updated along with this counter.
Feature BSS7003 High speed circuit switched data
Number
Name
Release
001163
HSCSD SUCC TCH SEIZ FOR HO
S7
Trigger points See figure Successful internal inter-cell handover for HSCSD, target cell allocations and activations for three channels
Description Number of successful HSCSD TCH seizures for a HO.
Updated When the RRM allocates a main HSCSD TCH/F as a response to ahandover attempt.
Dependencies with other counters/ PI(s)
Counter 001008 is updated along with this counter.
Feature BSS7003: High speed circuit switched data
Number
Name
Release
001164
HSCSD CON REL DUE TO FAIL
S7
Trigger points See figure A CONNECTION_FAILURE message which comes during an HSCSD
Description Number of HSCSD connection releases because of a failure.
Updated When the HSCSD main TCH/F is released with dx_cause indicating
a failure.
Feature BSS7003: High speed circuit switched data
Impact HO failure, Call cleared
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Number
Name
Release
001168
SUCC TCH SEIZ FOR A BSC CONTROLLED TRHO
S8
Trigger points See figure Successful BSC controlled TRHO
Description Number of successful TCH seizures for a BSC-controlled TRHO
Updated When the RRM allocates a TCH as a response to a TCH request ina BSC-controlled TRHO attempt.
Feature BSS8123 Advanced Multilayer Handling
Number
Name
Release
001169
REJ TCH SEIZ FOR A BSC CONTROLLED TRHO DUELACK OF RESOURCES
S8
Trigger points See figure Unsuccessful BSC controlled TRHO
Description Number of rejected TCH requests for a BSC-controlled TRHOprocedure because of exceeded load in the target cell.
Updated When the RRM rejects traffic channel allocation because of exceeded load in the target cell in a BSC-controlled TRHO.
Feature BSS8123: Advanced Multilayer Handling
Number
Name
Release
001170
SUCCESSFUL TCH SEIZURES FOR DADLB HO
S8
Trigger points See figure Successful handover due to DADL/B
Description The number of successful TCH seizures because of DADL/Bhandover.
Updated The counter is updated when a TCH allocation in the target cellduring DADL/B handover is successful. BSC internal handover case.
Feature BSS8032: Direct Access to Desired Layer/band
Number
Name
Release
001171
TCH REQUEST IN DADLB HO REJECTED
S8
Trigger points See figure Unsuccessful DADL/B handover due to lack of resources
Description Number of TCH requests in DADL/B handover rejected because of alack of TCH.
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Number
Name
Release
001171
TCH REQUEST IN DADLB HO REJECTED
S8
Updated The counter is updated when a TCH allocation in the target cellduring DADL/B handover is unsuccessful because of lack of TCH.BSC internal handover case.
Feature BSS8032: Direct Access to Desired Layer/band
Number
Name
Release
001172
DADLB START DUE TO EXCEEDED LOAD
S8
Trigger points See figures:. Successful handover due to DADL/B. Unsuccessful DADL/B handover due to lack of resources
Description Number of DADL/B handover at tempts, started because of exceededload in accessed cell.
Updated This counter is updated when channel request is rejected because of excessive load and Radio Resource management requests a DADL/ B handover. If the target cell is found within MaxTimeLimitDR, theDADL/B handover is started and also the counter 4129 is updated. If this timer triggers the DADL/B handover is not started.
Dependencies with other counters/ PI(s)
004129 is updated if DADL/B HO is started.
Feature BSS8032: Direct Access to Desired Layer/band
Number
Name
Release
001173
REMOVAL FROM QUE DUE TO DR
S8
Trigger points See figure Internal directed retry
Description Number of requests removed from the queue because of start of DR.
Updated This counter is updated when a request is removed from the queue
by the RRM because of the start of DR.
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Number
Name
Release
001174
GPRS TER UPGRD REQ
S9
Description Number of territory upgrade requests received from the PacketController Unit.
Updated When the Radio Resource Management receives from the PacketController Unit a request for new radio time slots to be added into theGPRS territory. The PCU can request an upgrade after BSC hasfulfilled the default territory defined by the operator parameters.
The upgrade of the GPRS territory may be started for variousreasons, for example when GPRS is set enabled in a BTS, GPRS-TRX is created or deblocked, TSL inside the GPRS territory isdeblocked or CS load decreases, but this counter is not triggered inthese cases.
NOTE! This counter is triggered only when GPRS Territory Upgradeis started by Packet Switched Radio Resource Managementrequesting additional GPRS capacity.
Feature BSS9006: GPRS Telecom in BCSU and MCMU
Number
Name
Release
001175
INCOMPL SERV GPRS TER UPGR REQ
S9
Description Number of territory upgrade requests that have been served with lessradio time slots than requested.
Updated When Radio Resource Management upgrades the GPRS territorywith less RTSLs than the Packet Controller Unit requested for.
Feature BSS9006: GPRS Telecom in BCSU and MCMU
Number
Name
Release
001176
GPRS TER UG REJ DUE CSW TR
S9
Description Number of territory upgrade requests that have been rejectedbecause of the high load of the circuit switched traffic.
Updated When Radio Resource Management rejects a GPRS territoryupgrade request from the PCU because of high traffic load in BTSand maintaining the margin of idle TCHs for circuit switched trafficdoes not allow the upgrade.
Feature BSS9006: GPRS Telecom in BCSU and MCMU
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Number
Name
Release
001177
GPRS TER UG REJ DUE LACK PSW RES
S9
Description Number of territory upgrade requests that have been rejectedbecause there are not enough resources capable of GPRS in theBTS.
Updated When Radio Resource Management rejects a GPRS territoryupgrade request of the PCU because all TRXs capable of GPRStraffic are already within the GPRS territory.
Feature BSS9006: GPRS Telecom in BCSU and MCMU
Number
NameRelease
001178
GPRS TER UG REJ DUE LACK PCU CAPS9
Description Number of territory upgrade requests that have been rejectedbecause the capacity of the Packet Controller Unit the BTS isconnected to is already totally in use.
Updated When Radio Resource Management rejects a GPRS territoryupgrade request from the PCU because the maximum number of TSLs, which the PCU is capable to handle are already in use.
Feature BSS9006: GPRS Telecom in BCSU and MCMU
Number Name
Release
001179GPRS TER DG DUE INC IN CSW TR
S9
Description Number of GPRS territory downgrades made because of theincrease in the circuit switched traffic load.
Updated When the Radio Resource Management starts a GPRS territorydowngrade in order to maintain the margin of idle TCHs for circuitswitched traffic after a circuit switched channel allocation, or whenthe BSC during TCH congestion in the CSW territory directlyallocates a TCH belonging to the GPRS territory.
Feature BSS9006: GPRS Telecom in BCSU and MCMU
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Number
Name
Release
001180
GPRS TER UG DUE DEC CSW TR
S9
Description Number of GPRS territory upgrades made to fulfill the default GPRSterritory as a consequence of decrease in the circuit switched trafficload.
Updated When the Radio Resource Management starts a GPRS territoryupgrade in order to fulfill the defined default GPRS territory after thetraffic load in the BTS has decreased as a consequence of a circuitswitched channel release.
Feature BSS9006: GPRS Telecom in BCSU and MCMU
Number
Name
Release
001181
GPRS TER DOWNGRADE REQ
S9
Description Number of territory downgrade requests received from the PacketController Unit.
Updated When the Radio Resource Management receives from the PacketController Unit a request for a GPRS territory downgrade. The PCUcan request for a downgrade for GPRS RTSLs beyond the defaultterritory defined by the operator parameters. A GPRS territorydowngrade is initiated because of increase of CS load. PCU caninitiate GPRS resource downgrade to additional GPRS resources.For example, when PCU has previously requested GPRS territory
upgrade and additional channels has been given for GPRS use.When there is no more need for additonal GPRS capacity PCUrequests for downgrade, the additional channels are removed fromGPRS territory and this counter is triggered.
Feature BSS9006: GPRS Telecom in BCSU and MCMU
Number
Name
Release
001182
FULL TCH SEIZ INTRA AMR HO
S10
Description Number of successful FR TCH seizures for an intra-cell HO when thechannel rate changes and AMR speech codecs are in use.
Updated When the Radio Resource Management allocates a FR TCH for intra-cell HO as a response to a TCH request and the channel rate ischanged from HR to FR and speech codec versions 3 are in use.
Dependencies with other counters/ PI(s)
Counter 001116 is updated along with this counter.
Feature BSS10004: Adaptive Multi Rate Codec
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Number
Name
Release
001183
HALF TCH SEIZ INTRA AMR HO
S10
Description Number of successful HR TCH seizures for intra-cell HO when thechannel rate changes and AMR speech codecs are in use.
Updated When the Radio Resource Management allocates a HR TCH for intra-cell HO as a response to a TCH request and the channel rate ischanged from FR to HR and speech codec versions 3 are in use.
Dependencies with other counters/ PI(s)
Counter 001117 is updated along with this counter.
Feature BSS10004: Adaptive Multi Rate Codec
Number Name
Release
001184TCH CALL REQ FOR AMR
S10
Description Number of TCH requests for an AMR call.
Updated When the Radio Resource Management receives a TCH request in acall setup or HO attempt and speech codec version 3 is the mostpreferred one.
Dependencies with other counters/ PI(s)
Counter 001026 is updated along with this counter in case of callsetup.
Feature BSS10004: Adaptive Multi Rate Codec
Number
Name
Release
001185
SUCCESSFUL AMR CODEC SET DOWNGRADES
S10
Description Number of successful AMR codec set downgrades during internalHOs for the source side AMR codec set. Downgrade is made to alignthe source side AMR codec set with the one chosen for the targetside in order to utilize the one-way downlink speech path connectionfor the target side during the internal HO. The utilization of one-waydownlink speech path connection decreases the amount of muting
experienced in the speech path connection. Downgrade decisionduring internal HO depends on the parameter AMR codec mode setdowngrades and upgrades enabled.
Updated By the Abis interface services after successful mode modifyprocedures for BTS and MS.
Feature BSS10004: Adaptive Multi Rate Codec
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Number
Name
Release
001186
UNSUCCESSFUL AMR CODEC SET DOWNGRADES
S10
Description Number of unsuccessful AMR codec set downgrades during internalHOs for the source side AMR codec set. Alignment between thesource side AMR codec set and the one chosen for the target sidehas failed and usage of one-way speech path downlink connectionfor the target side during the internal HO is not possible.
Updated By the Abis interface services after an unsuccessful mode modifyprocedure for BTS or MS.
Feature BSS10004: Adaptive Multi Rate Codec
Number
Name
Release
001187
SUCCESSFUL AMR CODEC SET UPGRADES
S10
Description Number of successful AMR codec set upgrades after internal HOs for the target side AMR codec set. Upgrade is made to utilize theoriginal AMR codec set of the target BTS which set was not chosenfor the target side because of target side alignment with the sourceside during internal HO. This alignment is made in order to utilize theone-way downlink speech path connection for the target side duringthe internal HO. The utilization of one-way speech path downlinkconnection decreases the amount of muting experienced in thespeech path connection. Upgrade decision after internal HO dependson the parameters AMR codec mode set downgrades and upgradesenabled and AMR multirate configuration in handovers.
Updated By the Abis interface services after successful mode modifyprocedures for BTS and MS.
Feature BSS10004: Adaptive Multi Rate Codec
Number
Name
Release
001188
UNSUCCESSFUL AMR CODEC SET UPGRADES
S10
Description Number of unsuccessful AMR codec set upgrades after internal HOsfor the target side AMR codec set. The target side continues to usethe currently used AMR codec set.
Updated By the Abis interface services after an unsuccessful mode modifyprocedure for BTS or MS.
Feature BSS10004: Adaptive Multi Rate Codec
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Number
Name
Release
001189
TCH REQ FOR 96 DAT CALL
S10
Description Number of TCH requests for 9.6 kbit/s data call.
Updated When the Radio Resource Management receives a TCH request for a single slot 9.6kbit/s data connection in a call or a handover attempt.
Number
Name
Release
001190
SUCC TCH SEIZ FOR 96 DAT CALL
S10
Description Number of successful TCH seizures for 9.6 kbit/s data call.
Updated When the Radio Resource Management allocates a TCH/F as aresponse to a single slot 9.6kbit/s request in a call or handover attempt.
Number
Name
Release
Definition updated
001191
SPARE001191
S10.5 ED
S11Description Reserved for future use.
Number
Name
Release
Definition updated
001192
TCH REQUESTS FOR CALL ATTEMPT
S10.5 ED
S11, S12 (Name changed)
Description Number of TCH channel requests for a call.
Updated Updated when a TCH is requested for a call. The counter is updatedonly once for every call attempt, that is, it is not updated for TCH-TCHhandover attempts.
In segment environment, if the seizure of TCH is successful, thecounter is updated to the BTS from which the TCH was successfullyseizured. If the seizure is unsuccessful, the counter is updated to theBCCH BTS.
Trigger type Event
Logical type Cumulative
Unit Integer number
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Number
Name
Release
001196
BSC O HO CMD
S11Description Number of all handover commands or assignment commands sent by
the BSC in an outgoing BSC-controlled handover (SDCCH-SDCCH,TCH-TCH or SDCCH-TCH HO).
Logical type Cumulative
Number
Name
Release
001197
BTS HO ASSGN
S11Trigger points See figures:
. Successful internal intra-cell handover
. Successful SDCCH internal intra-cell handover
Description Number of assignment commands sent in intra-BTS handovers(SDCCH-SDCCH, TCH-TCH or SDCCH-TCH).
Logical type Cumulative
Number
Name
Release
001198
TCH REL DUE TO RADIO FAIL PH 9-11
S11Description Number of TCH releases because of radio failures.
Updated This counter is updated in call phases 9-11 only (Outgoing handoversbefore CONNECT_ACK).
Logical type Cumulative
Number
Name
Release
001199
TCH REL DUE TO BSS FAIL PH 2-3
S11
Trigger points See figures:. Unsuccessful TCH activation, timer expires while waiting for
CHANNEL_ACTIVATION_ACK message. TCH assignment failure, MSC sends CLEAR_COMMAND message
Description Number of TCH releases because of BSS failures.
Updated This counter is updated in call phases 2-3 only.
Logical type Cumulative
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Number
Name
Release
001200
TCH REL DUE TO BSS FAIL PH 9-11
S11Description Number of TCH releases because of BSS failures. Same DX causes
as in counter 001140.
Updated This counter is updated in call phases 9-11 only (Outgoing handoversbefore CONNECT_ACK).
Logical type Cumulative
Number
Name
Release
001201
SDCCH FAIL PH 3
S11Description Number of all the failures on SDCCH in call phase 3 that do not
trigger any TCH failure counter in the same phase.
Logical type Cumulative
Number
Name
Release
001202
DROP AFTER TCH ASSIGN
S11Trigger points See figures:
.
CONNECTION_FAILURE message with cause transcoder_failureduring a call . Dropped call between ASSIGNMENT COMPLETE and
DISCONNECT
Description Number of dropped calls after the TCH is assigned.
Updated When the drop occurs between ASSIGNMENT_COMPLETE andDISCONNECT.
Logical type Cumulative
Number
Name
Release
001203
ERROR IND DURING LU
S11Description Number of Error indication messages received during the Location
Update procedure.
Logical type Cumulative
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Number
Name
Release
001204
DROP TCH ASSCOMPL TO RFCH REL
S11.5Trigger points See figures:
. CONNECTION_FAILURE message with cause transcoder_failureduring a call
. Dropped call between ASSIGNMENT COMPLETE and DISCONNECT
. Dropped call between ASSIGNMENT COMPLETE and RF CHANNEL RELEASE ACK
Description Number of TCH drops between the Assignment Complete and the RFChannel Release Ack messages.
Updated When the TCH transaction ends in a phase between the AssignmentComplete and the RF Channel Release Ack messages.
Dependencies with other counters
Some of the counters 001013, 001014, 001029, 001030, 001046,001047, 001048, 001049, 001050, 001051, 001070, 001081, 001084,001085, 001087, 001088, and 001202 may be updated together withthis counter.
Number
Name
Release
001205
TCH REL DUE RAD FAIL PH 2-3
S11.5Trigger points See figure Timer T3107 expires while waiting for
ASSIGNMENT_COMPLETE messageDescription Number of the TCH releases because of the radio failures.
Updated When the TCH is released in call phase 2 (MM signalling) or 3 (Basicassignment) because of a radio failure.
Dependencies with other counters
Counter 001139 is updated together with this counter.
Number
Name
Release
001206
TCH REL DUE RAD FAIL PH 12-14
S11.5Description Number of the TCH releases because of radio failures.
Updated When the TCH is released during the Handover phases (12-14)because of a radio failure.
Dependencies with other counters
Counter 001139 is updated together with this counter.
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Number
Name
Release
001207
TCH REL DUE BSS FAIL PH 12-14
S11.5Description Number of the TCH releases because of the BSS failures.
Updated When the TCH is released during the Handover phases (12-14)because of a BSS failure.
Dependencies with other counters
Counter 001140 is updated together with this counter.
Number
Name
Release
001208
A IF CRC MISMATCH CALL SETUP
S11.5Description Number of the TCH requests rejected because of the mismatch
between the types of the requested channel and the A interfacecircuit, updated in call setup phase only.
Updated When the RRM changes the A interface circuit pool before the TCHallocation.
Dependencies with other counters
Counter 001122 is updated together with this counter
Number
NameRelease
Definition updated
001209
GPRS TER DG REJ DUE STREAMINGS11.5
S12
Description This counter is not in use.
Updated This counter is not updated.
Number
Name
Release
Definition updated
001210
GPRS TER DG REQ WHEN EQOS ON
S11.5
S12
Description This counter is not in use.
Updated This counter is not updated.
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Number
Name
Release
001211
TCH REL BSC BSC CONFLICT CALL
S11.5Description Number of TCH releases because of a BSC-BSC conflict.
Updated When a TCH is released (with cause bc_t_bsc_bsc_conflict_c in callphases 1-8 or 15)
Feature BSS11052: Dynamic Frequency and Channel Allocation
Number
Name
Release
001212
TCH REL BSC BSC CONFLICT TARG
S11.5
Description Number of TCH releases because of a BSC-BSC conflict.Updated When a TCH is released (with cause bc_t_bsc_bsc_conflict_c in call
phases 12-14)
Feature BSS11052: Dynamic Frequency and Channel Allocation
Number
Name
Release
001213
GPRS TER UG REQ FROM CSW
S11.5Description Number of territory upgrade requests to PCU init iated by the CSW.
Updated When the RRM initiates a PSW territory upgrade to the PCU.
Dependencies with other counters
001214 and 001215
Feature BSS1109672: Dynamic Abis Enhancement
Number
Name
Release
001214
GPRS TER UG FROM CSW PARTIAL
S11.5
Description Number of territory upgrade requests from the CSW RRM to the PCUthat have been served with less radio time slots than requested, i.e.partially successful PSW territory upgrade in the PCU.
Updated When the PCU upgrades the GPRS territory with less RTSLs than theRRM requested for.
Dependencies with other counters
001213
Feature BSS1109672: Dynamic Abis Enhancement
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Number
Name
Release
001215
GPRS TER UG FROM CSW FAILED
S11.5Description Number of territory upgrade requests from the CSW RRM to the PCU
where the upgrade of the single new radio time slots to the PCU wasnot successful.
Updated When the PCU rejects the whole PSW territory upgrade, i.e. no singlenew RTSL was upgraded to the PCU.
Dependencies with other counters
001213
Feature BSS1109672: Dynamic Abis Enhancement
Number Name
Release
001216TCH REQ REJ DUE TO LACK OF RES PER BCSU
S11.5Description Number TCH requests rejected because of lack of capacity in one of
the BCSU units.
Updated When there is no BCSU capacity available for either call or HOattempt requests. This counter may be updated either immediatelyafter a TCH request or, in case of queuing, when the queuing timer expires.
When the TCH request is rejected in case of directed retry (DR), thiscounter is updated as follows:
1) When a call is removed from the queue due to a DR attempt, thiscounter is NOT updated on the SOURCE side. Instead, counter 001173 is updated.
2) If queuing is not used or the queuing timer expires before a DRattempt, this counter is updated on the SOURCE side.
3) On the TARGET side, this counter is updated in case of congestion(blocking).
Trigger type Event
Dependencies with other counters
001173
Feature BSS115173: Soft Channel CapacityLogical type Cumulative
Unit Integer number
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Number
Name
Release
Definition updated
001217
INTERNAL TO EXTERNAL HO
S11.5
S12 (Name changed)
Description Number of internal handovers changed to external handovers.
Updated When an internal handover is aborted by changing it to an externalhandover.
Trigger type Event
Feature BSS20117: TCSM3i Support in BSC
Logical type Cumulative
Unit Integer number
Number
Name
Release
Definition updated
001218
NOT CHANGED INTERNAL HO
S11.5
S12 (Name changed)
Description Number of internal handovers that should be changed to externalhandovers, but for which the change is not allowed.
Updated When an internal handover should be changed to an externalhandover, but the change is not allowed due to too high A interfaceload.
Trigger type Event
Feature BSS20117: TCSM3i Support in BSC
Logical type Cumulative
Unit Integer number
Number
Name
Release
001219
SPARE001219
S11.5
Description Reserved for future use.
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Number
Name
Release
001220
SPARE001220
S11.5Description Reserved for future use.
Number
Name
Release
001221
SPARE001221
S11.5Description Reserved for future use.
Number Name
Release
001222SPARE001222
S11.5Description Reserved for future use.
Number
Name
Release
001223
SPARE001223
S11.5Description Reserved for future use.
Number
Name
Release
001224
SPARE001224
S11.5Description Reserved for future use.
Number
NameRelease
001225
SPARE001225S11.5
Description Reserved for future use.
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Number
Name
Release
001226
SPARE001226
S11.5Description Reserved for future use.
Number
Name
Release
001227
SPARE001227
S11.5Description Reserved for future use.
Number Name
Release
001228SPARE001228
S11.5Description Reserved for future use.
Number
Name
Release
001229
SPARE001229
S11.5Description Reserved for future use.
Number
Name
Release
001230
SPARE001230
S11.5Description Reserved for future use.
Number
NameRelease
001231
SDCCH LU ATTEMPTSS12
Description Number of SDCCH location update requests.
Updated When a location update is received as SDCCHrequest type.
Trigger type Event
Dependencies with other counters Counter 001000 is updated before this counter.
Feature BSS20003: CS Statistics Enhancements
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Number
Name
Release
001234
DTM CS TCH DROPS BETWEEN ASSCOMPLAND RFCH REL ACK
S12
Trigger points See figures:. DTM CS connection drops after ASSIGNMENT
COMPLETE; CONNECTION FAILURE received . DTM CS connection drops after ASSIGNMENT
COMPLETE; RELEASE INDICATION not received
Description Number of DTM CS TCHs dropped between ASSIGNMENT COMPLETE and RF CHANNELRELEASE ACK messages.
Updated When a CS TCH drop in the PS territory occursbetween ASSIGNMENT COMPLETE and RF
CHANNEL RELEASE ACK messages.This counter is updated in call phases 2, 3, 4, 9, 10,11 and 15 only.
Trigger type Event
Feature BSS20088: Dual Transfer Mode
Logical type Cumulative
Unit Integer number
Related topics
1 Traffic Measurement
Signalling charts of Traffic Measurement
Signalling charts of Dual Transfer Mode
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3 Signalling charts of Traffic MeasurementThe following figures show the signalling charts of Traffic Measurement:
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Figure 1. Basic call without counters
Immediate assign command
BSC:MS: BTS: MSC:
PagingPaging commandPaging request
Radio access part on CCCH
Paging part
Channel request Channel requiredChannel activation
Channel activation ackImmediate assign
DDCH establishment partSabm Establish indication Paging response
Ciphering mode complete
SDCCH signalling part
SetupSetupCall proceeding Call proceeding
Assignment requestPhysical context requestPhysical context confirm
Channel activationChannel activation ack
Assignment command
TCH seized, FACCH signalling part
Ua
Sabm Establish indicationUa
Assignment complete Assignment completeRf channel release
Rf channel release ackAlert AlertConnect Connect
Connect ackConnect ack
Conversation phase
Release completeClear command
Clear completeChannel release
Deactivate SACCHDisc Ua Release indicationRf channel release
Rf channel release ack
Release by MSDisconnect Disconnect
ReleaseReleaseRelease complete
Authentification requestAuthentification requestAuthentification response Authentification response
Identification requestIdentification requestIdentification response Identification response
Ciphering mode commandEncryption commandCiphering mode commandCiphering mode complete
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Figure 2. Basic call with counters
BTS: MSC:MS: BSC:
TCH succ req in norm assign 001009
Radio access part on CCCH
Paging part
Channel request Channel required
Channel activation
Physical context confirm
Channel activation
Basic call signalling continuos, see figure 1
Basic call signalling, see figure 1
SDCCH seiz att for MOCor SDCCH seiz att for MTC
001135
001136
FR TCH succ seiz for norm assignor HR TCH succ seiz for norm assign
001114
001115
FR TCH succ seizor HR TCH succ seiz
001106
001107
SDCCH attempts 001000
SDCCH succ seiz for imm assign 001007
TCH requests 001010
TCH req for norm assign 001026
Ass req, que allowor Ass req, que not allow
001056
001057
001137
001138
TCH seiz att for MOCor TCH seiz att for MTC
001102
001103
001104
001105
FR TCH requestsor HR TCH requestsor FR pref TCH requestsor HR pref TCH requests
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Figure 3. Basic call with priority subscriber
BTS: MSC:BSC:
TCH req for norm assign 001026
TCH requests 001010
Physical context confirm
Channel activation
Basic call signalling continuos, see figure 1
Basic call signalling, see figure 1
001054
001055
Ass req that can cause forced relor Ass req that can cause forced HO
001102001103
001104
001105
FR TCH requestsor HR TCH requestsor FR pref TCH requestsor HR pref TCH requests
TCH req with prior subscriber 001095
001137
001138
FR TCH succ seizor HR TCH succ seiz
001106
001107
FR TCH succ seiz for norm assignor HR TCH succ seiz for norm assign
001114
001115
TCH seiz att for MOCor TCH seiz att for MTC
TCH succ req in norm assign 001009
Succ TCH req with prior subscriber 001096
MS:
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Figure 4. FACCH call setup due to SDCCH congestion without counters
BSC:MS: MSC:BTS:
Mode modify request
Channel request Channel required
Channel activation
Channel activation ack
Immediate assign command
Immediate assign
SetupSetupCall proceeding Call proceeding
Assignment request
Mode modify ack
Channel mode modification
Channel mode modification ackAssignment complete
Alert AlertConnect Connect
Connect ackConnect ack
Channel mode modification
Channel mode modification ack
Conversation phase
Release by MS
DDCH establishment part
TCH, FACCH signalling part
Radio access part on CCCH
Paging part
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Figure 5. FACCH call setup due to SDCCH congestion with counters
BTS: MSC:MS: BSC:
Unsucc imm ass SDCCH attempt 001155
SDCCH attempts 001000
TCH request 001010
Succ TCH seiz due SDCCH cong 001099
001044
Att to seize TCH due SDCCH cong 001098
TCH req for FACCH call set-up 001043
Seiz att with busy SDCCH 001001
Radio access part on CCCH
Paging part
Channel request Channel required
Channel activation
FACCH call set-up signalling, see figure 4
Succ FR TCH seiz in FACCH callset-upor Succ HR TCH seiz in FACCH callset-up
001125
001126
001135
001136
SDCCH seiz att for MOCor
SDCCH seiz att for MTC
001123
001124
001137
001138
Succ TCH seiz in FACCH callset-up
TCH seiz att for MOCor TCH seiz att for MTC
FR TCH req for FACCH call set-upor TCH req for FACCH call set-up, chrt not def
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Figure 6. FACCH call setup due to SDCCH congestion, no free TCH channel.Optional software directed retry is not activated
BSC:
Unsucc imm ass SDCCH attempt 001155
TCH request rejected due to cong 001141
Att to seize TCH due SDCCH cong 001098
TCH req for FACCH call set-up 001043
TCH requests 001010
Seiz att with busy SDCCH 001001
SDCCH attempts 001000
MS: MSC:BTS:
Immediate assignment reject
Channel required
Radio access part on CCCH
Paging part
Channel request
No free TCH
001135
001136
SDCCH seiz att for MOCor SDCCH seiz att for MTC
001123
001124
FR TCH req for FACCH call set-upor TCH req for FACCH call, ch rate notdef
001137
001138
TCH seiz att for MOC
or TCH seiz att for MTC
001120
001121
FR TCH req rej due HR trafficor HR TCH req rej due FR traffic
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Figure 7. Normal release
Radio access part on CCCH
Paging part
DDCH establishment part
TCH seized, FACCH signalling part
Conversation phase
Release by MS
Disconnect DisconnectReleaseRelease
Release complete Release complete
Clear command
Channel release
Deactive sacch
DiscUa
Release indication
Rf channel rel
Rf channel rel ack
Clear complete
SDCCH signalling part
001108
001109
001110
001111
001112
001113
FR TCH speech FR ver 1or FR TCH speech FR ver 2or FR TCH speech FR ver 3or HR TCH speech HR ver 1or HR TCH speech HR ver 2or HR TCH speech HR ver 3
BSC:MS: MSC:BTS:
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Figure 8. Basic call, no free TCH and queuing or directed retry is not allowed
BSC:
Ass req, queuing not allow 001057
TCH req for norm assign 001026
TCH requests 001010
Rej ass req, que not allow 001061
TCH req rej due to lack 001011
TCH req rej due to cong 001141
MS: MSC:BTS:
Assignment failure
Rf channel releaseRf channel release ack
Clear command
Channel release
Deactive sacchDisc
UaRelease indication
Clear complete
Physical context confirmBasic call signalling, see figure 1
No free TCH and queueing or DR not allowed
TCH seiz att for MOCor TCH seiz att for MTC
001137
001138
001102
001103
001104
001105
FR TCH requestsor HR TCH requestsor FR pref TCH requestsor HR pref TCH requests
001120
001121
FR TCH req rej due HR trafficor HR TCH req rej due FR traffic
FR TCH req rej due to lackor HR TCH req rej due to lack
001118
001119
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Figure 9. Successful TCH queuing
BTS: MSC:MS: BSC:
Queue denominator 2 001021
Ave queue time of call attempt 001020
TCH succ req in norm assign 001009
Ass req, queuing allowed 001056
TCH req for norm assign 001026
TCH requests 001010
Call att set in queue for TCH 001016
Queuing indication
Rf channel release
Rf channel release ack
Basic call signalling, see figure 1
TCH channel is released, request is taken from queue
Physical context confirm
Channel activation
Basic call signalling, see figure 1
001102
001103
001104
001105
FR TCH requestsor HR TCH requestsor FR pref TCH requestsor HR pref TCH requests
TCH seiz att for MOCor TCH seiz att for MTC
001137
001138
001120
001121
FR TCH req rej due HR trafficor HR TCH req rej due FR traffic
FR TCH succ seizor HR TCH succ seiz
001106
001107
FR TCH succ seiz for norm assignor HR TCH succ seiz for norm assign
001114
001115
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Figure 10. Basic call, no free TCHs, unsuccessful queuing and directed retrynot activated
BSC:
001020
Call att in queue not served 001024
TCH req rej due to cong 001141
MS: MSC:BTS:
Assignment failure
Rf channel releaseRf channel release ack
Clear command
Channel releaseDeactive sacch
Disc
Ua Release indication
Clear complete
Physical context confirmBasic call signalling, see figure 1
No TCH released in time
001118
001119
FR TCH req rej due to lackor HR TCH req rej due to lack
Rej ass req, que allowed 001060
Call att set in queue for TCH 001016
TCH req rej due to lack 001011
Queuing indication
001120
001121
FR TCH req rej due HR trafficor HR TCH req rej due FR traffic
No free TCH, call is set in queue
Ass req, queuing allowed 001056
TCH seiz att for MOC
or TCH seiz att for MTC
001137
001138
001102
001103
001104
001105
FR TCH requestsor HR TCH requestsor FR pref TCH requestsor HR pref TCH requests
TCH requests 001010
TCH req for norm assign 001026
Queue denominator 2 001021
Ave queue time of call attempt
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Figure 11. TCH assignment failure with cause switch_circuit_pool , queuing anddirected retry not allowed
BTS: MSC:MS: BSC:
Ass req, que not allowed 001057
TCH requests 001010
Assignment failure
Clear command
Channel release
Deactive SACCH
Disc
UaRelease indication
Rf channel release
Rf channel release ack
Physical context confirm
Clear complete
Basic call signalling, see figure 1
TCH req for norm assign 001026
001104
001105
FR pref TCH requestsor HR pref TCH requests
001137001138
TCH seiz att for MOCor TCH seiz att for MTC
TCH req rej due to lack 001011
Rej ass req, que not allow 001061
001118
001119
FR TCH req rej due to lackor HR TCH req rej due to lack
TCH req rej due change crct pool 001122
TCH req rej due to cong 001141
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Figure 12. Unsuccessful TCH activation
BTS: MSC:MS: BSC:
Assignment failure
Clear command
Channel release
Deactive SACCHDisc
Ua
Release indication
Clear complete
Basic call signalling, see figure 1
TCH activation fail 001028
SDCCH Rf channel rel
SDCCH Rf channel rel ack
Rf channel rel ack
Physical context request
Assignment request
Physical context confirm
Channel activation
Channel activation nack
Rf channel rel
Failure
TCH transact end due ch act fail 001081
001133001134
FR TCH transactions failor HR TCH transactions fail
FR TCH speech FR ver 1or FR TCH speech FR ver 2or FR TCH speech FR ver 3or HR TCH speech HR ver 1or HR TCH speech HR ver 2or HR TCH speech HR ver 3
001108
001109
001110
001111
001112
001113
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Figure 13. Unsuccessful TCH activation, timer expires while waiting for CHANNEL_ACTIVATION_ACK message
MSC:BSC:BTS:MS:
TCH rel due BSS fail 001140
TCH transact end due BSS probl 001012
Start timer T9103
SDCCH Rf channel relSDCCH Rf channel rel ack
Rf channel rel ack
Assignment failureClear command
Channel release
Deactive SACCHDisc
Ua Release indication
Clear complete
Physical context requestAssignment request
Physical context confirm
Channel activation
Rf channel rel
Basic call signalling, see figure 1
TCH transact end due Abis fail 001045
TCH transact end due Abis fail 001084
001133001134
FR TCH transactions failor HR TCH transactions fail
001108
001109
001110
001111
001112
001113
FR TCH speech FR ver 1or FR TCH speech FR ver 2or FR TCH speech FR ver 3or HR TCH speech HR ver 1or HR TCH speech HR ver 2or HR TCH speech HR ver 3
Timer T9103 expires
TCH rel due to BSS fail PH 2-3 001199
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Figure 15. TCH assignment failure, MSC sends CLEAR_COMMAND message
MSC:BSC:BTS:MS:
SDCCH Rf channel rel
SDCCH Rf channel rel ack
TCH Rf channel rel ack
Radio access part on CCCHPaging part
TCH seized, FACCH signalling part
Sabm
Disc
DDCH establishment part
Ua
Channel release
Release indication
TCH Rf channel release
Establish indication Clear command
Clear complete
Deactive SACCH
SDCCH signalling part
TCH transact end due BSS probl 001012
TCH transact end due A int fail 001051
TCH transact end due A int fail 001087
001108
001109
001110
001111
001112
001113
FR TCH speech FR ver 1or FR TCH speech FR ver 2or FR TCH speech FR ver 3or HR TCH speech HR ver 1or HR TCH speech HR ver 2or
HR TCH speech HR ver 3001133
00113
FR TCH transactions failor HR TCH transactions fail
TCH rel due BSS fail 001140
TCH rel due to BSS fail PH 2-3 001199
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Figure 16. CONNECTION_FAILURE message with cause transcoder_failure during a call
MSC:BSC:BTS:MS:
Failure
TCH transact end due transc fail 001029
Rf channel rel ack
Conversation phase
Clear request
Disc
Ua
Channel release
Release indication
Rf channel release
Connection failure
Clear command
Clear complete
Deactive SACCH
001108
001109
001110
001111
001112
001113
FR TCH speech FR ver 1or FR TCH speech FR ver 2or FR TCH speech FR ver 3or HR TCH speech HR ver 1or HR TCH speech HR ver 2or HR TCH speech HR ver 3
001127
001128
001129
001130
001131
001132
TCH transc fail FR speech ver 1or TCH transc fail FR speech ver 2or TCH transc fail FR speech ver 3or TCH transc fail HR speech ver 1or TCH transc fail HR speech ver 2or TCH transc fail HR speech ver 3
001133
001134
FR TCH transactions failor HR TCH transactions fail
Drop after TCH assign 001202
Drop TCH asscompl to RFCH rel 001204
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Figure 17. TRX or TSL is blocked with different causes during a call
MSC:BSC:BTS:MS:
TCH transact end due LAPD fail 001046
TCH Abis probl 001045
TCH transact end due BSS probl 001012
TRX / TSL is blocked
Clear complete
Rf channel rel ack
Conversation phase
Clear request
DiscUa
Channel release
Rf channel release
Clear command
Deactive SACCH
TCH transact end due BTS fail 001047
TCH transact end due USER act 001048
TCH transact end due NETW act 001050
TCH transact end due Abis int fail 001084
001133
001134
FR TCH transactions fail
or HR TCH transactions fail
001108
001109
001110
001111
001112
001113
FR TCH speech FR ver 1or FR TCH speech FR ver 2or FR TCH speech FR ver 3or HR TCH speech HR ver 1or HR TCH speech HR ver 2or HR TCH speech HR ver 3
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Figure TRX or TSL is blocked with different causes during a call : Countersupdated with cause LAPD_failure: 001012 and 001046. Counters updated withcause BTS_failure: 001012 and 001047. Counter 001048 is updated with causeUSER_actions. Counter 001050 is updated with cause NETW_actions. Countersupdated with cause ABIS_failure: 001012, 001045 and 001084. Counter 001108,001109, 001110, 001111, 001112 or 001113 and counter 001133 or 001134 arealways updated with these causes.
Figure 18. SDCCH congestion, FACCH call setup is not activated
BSC:
Unsucc imm ass SDCCH att001155
SDCCH seiz att for MOC001135 or
SDCCH seiz att for MTC001136
SDCCH attempts001000
Seiz att with busy SDCCH001001
MS: MSC:BTS:
Immediate assignment reject
Channel required
Channel request
Paging part
Radio access part on CCCH
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Figure 19. Unsuccessful SDCCH activation
BSC:
SDCCH transact end due ch act fail001072
SDCCH activation failure001027
MS: MSC:BTS:
Failure
Channel request
Channel required
Channel activation
Channel activation nack
Rf channel release
Rf channel release ack
Immediate assignment reject
Radio access part on CCCH
Paging part
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Figure 20. Unsuccessful SDCCH activation, timer expires while waiting for CHANNEL_ACTIVATION_ACK message
MSC:BSC:BTS:MS:
SDCCH transact end dueBSS fail
Start timer T9103
Channel request
Channel required
Channel activation
Paging part
Rf channel release
Rf channel release ack
Immediate assignment reject
Radio access part on CCCH
Timer T9103 expires
SDCCH transact end duefail in Abis int
SDCCH transact end due fail in Abis intduring a call
001002
001033
001075
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Figure 21. Connection failure during SDCCH assignment
BTS:
Failure
MSC:MS: BSC:
SDCCH transact ended due radio fail001003
Channel request Channel required
Channel activation
Channel activation ack
Immediate assign command
Immediate assign
Connection failure
Channel release
Deactive SACCHDisc
UaRelease indication
Rf channel release
Rf channel release ack
Radio access part on CCCH
Paging part
DDCH establishment part
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Figure 23. Unsuccessful SDCCH activation, timer expires while waiting for PHYSICAL_CONTEXT_CONFIRM message
MSC:BSC:BTS:MS:
SDCCH transact end dueBSS fail
SDCCH transact end duefail in Abis int
SDCCH transact end due fail in Abis intduring a call
001002
001033
001075
Timer T9108 expires
Start timer T9108
Assignment request
Physical context request
Assignment failure
Basic call signalling, see figure 1
Clear command
Rf channel release
Rf channel release ack
Channel release
Deactive SACCHDisc
UaRelease indication
Clear complete
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Figure 24. TRX/TSL is blocked with different causes during an SDCCH channelactivation
Figure TRX/TSL is blocked with different causes during an SDCCH channel activation : Counters updated with cause LAPD_failure : 001002 and 001035.Counters updated with cause BTS_failure : 001002 and 001036. Counter 001037is updated with cause USER_actions . Counter 001039 is updated with causeNETW_actions . Counters updated with cause ABIS_failure : 001002, 001033 and001075.
MSC:BSC:BTS:MS:
SDCCH transact end dueBSS fail
SDCCH transact end duefail in Abis int
001002
001033
TRX / TSL is blocked
Channel requestChannel required
Channel activation
Paging part
Rf channel release
Rf channel release ack
Immediate assignment reject
SDCCH transaction end dueLAPD fail 001035
SDCCH transact ended dueBTS fail 001036
SDCCH transact end dueuser actions 001037
SDCCH transact end duenetw act fail 001039
SDCCH transact end due fail in Abis intduring a call 001075
Radio access part on CCCH
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Figure 25. Successful trunk reservation. Counters updated: 001040, 001041and basic call counters, see Figure 2.
BSC:
Succ trunk reservations001041
Trunk reservations001040
MS: MSC:BTS:
Physical context request
Assignment request
Physical context confirm
Channel activation
Channel activation ack
Assignment command
Basic call signalling, see figure 1
Basic call signalling, see figure 1
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Figure 26. Unsuccessful trunk reservation
MSC:BSC:BTS:MS:
TCH req for norm assign 001026
TCH requests 001010
Trunk reservations 001040
Assignment failure
Rf channel releaseRf channel release ack
Basic call signalling, see figure 1
Clear command
Channel releaseDeactive sacchDisc
UaRelease indication
Clear complete
Physical context confirm
001056
001057
Ass req, que allowor Ass req, que not allow
001102
001103
001104
001105
FR TCH requestsor HR TCH requests
or FR pref TCH requestsor HR pref TCH requests
001137
001138
TCH seiz att for MOCor TCH seiz att for MTC
Unsuccessful trunk reservation
Refus TCH req of non-prior subsc 001097
Refused trunk reservations 001042
001100
001101
FR TCH req for trunk reserv rejor HR TCH req for trunk reserv rej
001060
001061
Rej ass req, queueing allowedor Rej ass req, queueing not allowed
001120
001121
FR TCH req rej due HR trafficor HR TCH req rej due FR traffic
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Figure 27. Successful internal intra-cell handover. Counters 001090 and001091 are updated only with underlay overlay handover.
MSC:BSC:BTS:MS:
TCH requests 001010
Meas report Meas resultPhysical context request
Physical context confirm
HO measurement, Old TCH channel
Channel activationChannel activation ack
Assignment command
Assignment command
Sabm Establish indicationUa
Rr HO performed
Rf channel releaseRf channel release ack
Assignment complete Assignment complete
001137
001138
TCH seiz att for MOCor TCH seiz att for MTC
001064
001065
Att to req HO, que allowedor Att to req HO, que not allowed
001102 or 001103 or 001104 or 001105
FR TCH requestsHR TCH requestsFR pref TCH requestsHR pref TCH requests
TCH req for underlay/overlay HO 001090
Succ TCH req for HO 001008
TCH seiz for underlay/overlay HO 001091
001106 or 001107
FR TCH succ seizHR TCH succ seiz
Succ seiz of FR TCH in int HOwith ch rate changesor Succ seiz of HR TCH in int HO
with ch rate changes
001116
001117
Old TCH channel release
Signalling on new TCH channel
Signalling on old TCH channel
New TCH channel reservation and activation
BTS HO assgn 001197
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Figure 28. Internal intra-cell HO, successful TCH queuing
MSC:BSC:BTS:MS:
TCH requests 001010
Meas report Meas resultPhysical context request
Physical context confirm
Channel activation
Rf channel releaseRf channel release ack
001102 or 001103 or
001104 or 001105
FR TCH requestsHR TCH requests
FR pref TCH requestsHR pref TCH requests
TCH req for underlay/overlay HO 001090
001106 or 001107
FR TCH succ seizHR TCH succ seiz
New TCH channel reservation and activation
HO measurement, Old TCH channel
Att to req HO, que allowed 001064
No free TCH, request is set in queue
001120
001121
FR TCH req rej due HR trafficor HR TCH req rej due FR traffic
TCH channel is released, request is taken from queue
HO signalling, see figure 27
001137 or 001138
TCH seiz att for MOCTCH seiz att for MTC
HO att set in queue for TCH 001017
Queued urgent HO attempt 001142
001023
001022
Queue denominator 3
Ave queue time of ho attempt
001143
001145
Ave queue time of urgent ho attor Ave queue time of non urgent ho att
Queue denominator 4Queue denominator 4
001144 or 001146
Succ TCH req for HO 001008
TCH seiz for underlay/overlay HO 001091
Succ FR TCH int HO with ch rt chor
Succ HR TCH int HO with ch rt ch
001116
001117
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Figure 29. Unsuccessful internal intra-cell handover, timer expires while waitingfor CHANNEL_ACTIVATION_ACK message
MSC:BSC:BTS:MS:
TCH transact end due BSS probl 001012
Start timer T9103
Timer T9103 expires
Meas report Meas result
Physical context requestPhysical context confirm
Channel activation
Call going on the TCH channel
Rf channel release
Rf channel release ack
HO measurement, HO decision
New TCH channel reservation and activation
Normal HO counters updated, see figure 27
TCH Abis probl 001045
TCH transact end due Abis int failon new channel
001108
001109
001110
001111
001112
001113
FR TCH speech FR ver 1or FR TCH speech FR ver 2or FR TCH speech FR ver 3or HR TCH speech HR ver 1or HR TCH speech HR ver 2or HR TCH speech HR ver 3
FR TCH transactions failor HR TCH transactions fail
001133
001134
Call continuous on the old TCH channel
001086
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Figure 30. Unsuccessful internal intra-cell handover, CONNECTION_FAILUREmessage with cause remote_transcoder_failure comes to the targetchannel
MSC:BSC:BTS:MS:
Meas report Meas resultPhysical context request
Physical context confirm
Channel activation
Call going on the TCH channelHO measurement, HO decision
New TCH channel reservation and activation
TCH transact end due transcfail on target
FR TCH transactions failor
HR TCH transactions fail
001133
001134
001031
Channel activation ack
Call continuous on the old TCH channel
Signalling on FACCH TCH (old channel)Assignment command
Connection failure
Assignment command
Rf channel releaseRf channel release ack
HO failure HO failure
Signalling on FACCH TCH (new channel), channel release
001108
001109
001110
001111
001112
001113
FR TCH speech FR ver 1or FR TCH speech FR ver 2or FR TCH speech FR ver 3or HR TCH speech HR ver 1or HR TCH speech HR ver 2or HR TCH speech HR ver 3
001127
001128
001129
001130
001131
001132
TCH transc fail FR speech ver 1or TCH transc fail FR speech ver 2or TCH transc fail FR speech ver 3or TCH transc fail HR speech ver 1or TCH transc fail HR speech ver 2or TCH transc fail HR speech ver 3
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Figure 31. Unsuccessful internal intra-cell handover, timer expires on thesource channel, call cleared
MSC:BSC:BTS:MS:
Meas report Meas resultPhysical context request
Physical context confirm
FR TCH transactions failHR TCH transactions fail
001133 or 001134
Start timer T3107
HO measurement, Old TCH channel
Channel activationChannel activation ack
Assignment commandAssignment command
Sabm Establish indicationUa
Rf channel releaseRf channel release ack
Clear requestClear command
Rf channel releaseRf channel release ack
Clear complete
New TCH channel reservation and activation
Normal HO counters updated, see figure 6
Signalling on old TCH channel
Signalling on new TCH channel
Signalling on old TCH channel
Timer T3107 expires
New channel release
001108 or 001109 or 001110 or 001111 or 001112 or 001113
FR TCH speech FR ver 1FR TCH speech FR ver 2FR TCH speech FR ver 3HR TCH speech HR ver 1HR TCH speech HR ver 2HR TCH speech HR ver 3
001133 or 001134
FR TCH transactions failHR TCH transactions fail
Old TCH channel release
TCH transact end due fail on source 001014001108 or 001109 or 001110 or 001111 or 001112 or 001113
FR TCH speech FR ver 1FR TCH speech FR ver 2FR TCH speech FR ver 3HR TCH speech HR ver 1HR TCH speech HR ver 2HR TCH speech HR ver 3
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Figure 32. Unsuccessful underlay overlay internal intra-cell handover, queuingnot allowed
BSC: MSC:BTS:MS:
Meas report Meas result
Physical context requestPhysical context confirm
HO measurement, Old TCH channel
Call continuous on old channel
New TCH channel reservation and activation
No free TCH, queueing not allowed
TCH requests 001010
001137
001138
TCH seiz att for MOCor TCH seiz att for MTC
001102
001103
001104
001105
FR TCH requestsor HR TCH requestsor FR pref TCH requestsor HR pref TCH requests
Att to req HO, que not allowed 001065
TCH req for underlay/overlay HO 001090
TCH req rej due to lack 001011
001118
001119
FR TCH req rej due to lackor HR TCH req rej due to lack
001120
001121
FR TCH req rej due HR trafficor HR TCH req rej due FR traffic
HO req fail, queueing not allowed 001069
TCH req for underlay/overlay HOrej due lack 001092
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Figure 33. Internal intra-cell handover, unsuccessful TCH queuing
MSC:BSC:BTS:MS:
TCH requests 001010
Meas report Meas resultPhysical context request
Physical context confirm
001102 or
001103 or 001104 or 001105
FR TCH requests
HR TCH requestsFR pref TCH requestsHR pref TCH requests
New TCH channel reservation and activation
HO measurement, Old TCH channel
No free TCH, request is set in queue
001120
001121
FR TCH req rej due HR trafficor HR TCH req rej due FR traffic
001137 or 001138
TCH seiz att for MOCTCH seiz att for MTC
HO att set in queue for TCH 001017
Queued urgent HO attempt 001142
Queue denominator 3 001023Ave queue time of ho attempt 001022
Att to req HO, queueing allowed 001064
Call continous on old TCH channel
No suitable TCH released in time
TCH req rej due to lack 001011
HO att in queue not served 001025
HO req rej , queueing allowed 001068
001144 or 001146
Queue denominator 4Queue denominator 5
Queued urgent HO att not served 001147
001143
001145
Ave queue time of urgent ho attor
Ave queue time of non urgent ho att
001118 or 001119
FR TCH req rej due to lackHR TCH req rej due to lack
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Figure Internal intra-cell handover, unsuccessful TCH queuing : Counters 001142,001143, 001144 and 001147 are updated only if the handover is started by causeurgent_handover . Counters 001145 and 001146 are updated only if the handover is started by cause non_urgent_handover .
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Figure 34. Internal directed retry
MSC:BSC:BTS:MS:
TCH requests 001010
Physical context requestPhysical context confirm
001102 or 001103 or 001104 or 001105
FR TCH requestsHR TCH requestsFR pref TCH requestsHR pref TCH requests
Ass req, queueing allowed 001065
Call att set in queue for TCH 001016
Assignment request
Sabm Establish indication
Basic call signalling, see figure 1
Channel activation
Channel activation ack
HO command
HO command
HO access HO detectionPhysical info
Ua
Rr Assignment complete
Rf channel releaseRf channel release ack
HO complete HO complete
Cell is congested, no TCH
Queueing indication
TCH reservation and activation in new BTS
Basic call signalling continuous, see figure 1
Queueing possible and started
TCH request for norm assign 001026
TCH req for underlay/overlay HO 001090
001137 or 001138
TCH seiz att for MOCTCH seiz att for MTC
Normal HO counters updated, see figure 35
SDCCH release in old BTS
Signalling on FACCH - TCH in new BTS
Signalling on SDCCH in old BTS
DR HO beginsRemoval from queue due to DR 001173
Ave queue time of call attempt 001020
Queue denominator 2 001021
BTS O HO cmd 001196
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Figure Successful internal inter-cell handover : Counters 001090 and 001091 areupdated only with underlay overlay handover.
Figure 36. Unsuccessful internal inter-cell handover
MSC:BSC:BTS:MS:
Meas report Meas result
TCH activation fail 001028
HO measurement, Old TCH channel
Channel activation
Channel activation nack
New TCH channel reservation and activation in new BTS
Call continuous on the old channel
Rf channel releaseRf channel release ack
Normal HO counters updated, see figure 35
New channel release
TCH transact end due TCH actfail in target
001108
001109
001110
001111
001112
001113
FR TCH speech FR ver 1or FR TCH speech FR ver 2or FR TCH speech FR ver 3or HR TCH speech HR ver 1or HR TCH speech HR ver 2or HR TCH speech HR ver 3
001133
001134
FR TCH transactions failor HR TCH transactions fail
001083
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Figure 37. Successful external handover, target
MSC:BSC:BTS:MS:
TCH requests 001010
HO request
Channel activation
Channel activation ack
HO request ack
HO access HO detection HO detection
Physical info
Sabm Establish indication
UaHO complete
Rr
HO complete HO completed
001064
001065
Att to req HO, que allowedor Att to req HO, que not allowed
001102
001103
001104
001105
FR TCH requestsor HR TCH requestsor FR pref TCH requestsor HR pref TCH requests
Succ TCH req for HO 001008
001106
001107
FR TCH succ seizor HR TCH succ seiz
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Figure 38. Successful external handover, source
BTS: MSC:MS: BSC:
FR TCH speech FR ver 1001108 or
FR TCH speech FR ver 2001109 or
FR TCH speech FR ver 3001110 or
HR TCH speech HR ver 1001111 or
HR TCH speech HR ver 2001112 or
HR TCH speech HR ver 3001113
HO command
Rf channel release
Rf channel release ack
HO requiredMeas report Meas result
Clear complete
HO command
HO command
Clear command
MSC O HO cmd 001195
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Figure 40. Unsuccessful external handover, MS sends a handover failure
MSC:BSC:BTS:MS:
Meas report Meas result HO requiredHO request
HO measurement, HO decision
Channel activation
Channel activation ack
Call going on the TCH channel
Call continuous on the old channel
HO request ack
Clear command
Rf channel release
Rf channel release ack
HO failure HO failure HO failure
Clear complete
HO commandHO commandHO command
New TCH channel reservation and activation in new BSC
Normal HO counters updated, see figure 37
Signalling on old BSC, MS sends HO failure
Signalling on new BSC, channel is released
TCH transact end due BSS probl 001012
TCH transact end due A int fail 001051
TCH transact end due A int fail on
new001108
001109
001110
001111
001112
001113
FR TCH speech FR ver 1or FR TCH speech FR ver 2or FR TCH speech FR ver 3or HR TCH speech HR ver 1or HR TCH speech HR ver 2or HR TCH speech HR ver 3
001133
001134
FR TCH transactions failor HR TCH transactions fail
001089
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Figure 41. Successful traffic reason handover, source
MSC:BSC:BTS:MS:
HO s due to traffic reasons 001052
Rf resource indicationResource request
Resource indication
HO candidate enquiry
HO required
HO candidate responseHO commandHO commandHO command
Enquiries of traffic reason HO 001053
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Figure 43. Unsuccessful SDCCH internal intra-cell handover, timer expireswhile waiting for CHANNEL_ACTIVATION_ACK message
MSC:BSC:BTS:MS:
Timer T9103 expires
Start timer T9103
Meas report Meas result
Physical context request
Physical context confirm
Channel activation
HO measurement, old SDCCH channel
Rf channel release
Rf channel release ack
New SDCCH channel reservation and activation
SDCCH transact end due BSSprobl
Signalling continuous on old SDCCH channel
SDCCH transact end due Abisint fail
SDCCH transact end due Abis int failon target
001002
001033
001077
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Figure 44. Unsuccessful SDCCH internal intra-cell handover, unsuccessfulchannel activation
BSC:
SDCCH transact end duech act fail on target
001074
SDCCH transact end duech act fail
001027
MS: MSC:BTS:
Meas report Meas result
Physical context request
Physical context confirm
Channel activation
Rf channel release
Rf channel release ack
Channel activation nack
HO measurement, old SDCCH channel
New SDCCH channel reservation and activation
Signalling continuous on old SDCCH channel
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Figure 45. Unsuccessful SDCCH internal intra-cell handover,CONNECTION_FAILURE message comes to the target channelduring handover
MSC:BSC:BTS:MS:
Meas report Meas result
Physical context request
Physical context confirm
HO measurement, Old SDCCH channel
Channel activation
Channel activation ack
Assignment commandAssignment command
Sabm Establish indication
UaConnection failure
Signalling continuous on old channel
Rf channel release
Rf channel release ack
New SDCCH channel reservation and activation
Signalling on old SDCCH channel
Signalling on new SDCCH channel
SDCCH transact end dueradio fail on target 001005
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Figure 46. Successful SDCCH internal inter-cell handover
MSC:BSC:BTS:MS:
SDCCH attempts 001000
Succ SDCCH seiz for HO 001006
Meas report Meas result
Sabm Establish indication
HO measurement, Old SDCCH channel in old BTS
Channel activation
Channel activation ack
New SDCCH channel reserv. and activ. in new BTS
Signalling on the old SDCCH channel in the old BTS
HO command
HO command
Signalling on new SDCCH channel in new BTS
HO access HO detection
Physical info
Ua
Rr HO performed
Old SDCCH channel release in the old BTS
Rf channel release
Rf channel release ack
HO complete HO complete
001135
001136
SDCCH seiz att for MOCor SDCCH seiz att for MTC
BTS O HO cmd 001196
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Figure 50. Unsuccessful SDCCH external handover, timer expires while waitingfor CLEAR_COMMAND message
MSC:BSC:BTS:MS:
SDCCH transact end due A int fail 001034
SDCCH transact end due BSS fail 001002
Timer T8 expires
Start timer T8
HO command
Rf channel release
Rf channel release ack
HO requiredMeas report Meas result
Clear complete
HO commandHO command
Clear command
Clear request
Signalling on SDCCH source channel
Rf channel release ackRf channel release
Clear command
Clear complete
SDCCH transact end due A int failon source
Signalling on SDCCH target channel
SDCCH transact end due BSS fail 001002
SDCCH transact end due A int fail 001034
SDCCH transact end due A int failon target
001079
001080
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Figure 51. Successful forced release
MSC:BSC:BTS:MS:
TCH requests 001010
Call going on TCH channel
Clear requestClear command
Channel releaseDeactive SACCHDisc
Ua Release indicationRf channel release
Rf channel release ack
Clear complete
Channel activation
Physical context confirm
Queueing indication
New call coming with priority subscriber
Basic call signalling, see figure 1
TCH req for norm assign 001026Ass req that can cause forced rel 001054
001102 or 001103 or 001104 or 001105
FR TCH requestsHR TCH requestsFR pref TCH requestsHR pref TCH requestsTCH seiz att for MOCTCH seiz att for MTC
001137 or 001138
001120 or 001121
FR TCH req rej due HR trafficHR TCH req rej due FR traffic
No free TCH channel, call with lower priority is released
Released TCH channel is allocated for the priority call
Forced release 001070
TCH succ req in norm assign 001009
001106 or 001107
FR TCH succ seizHR TCH succ seiz
Signalling continuous like basic call, see figure 1
001114
001115
FR TCH succ seiz for norm assignor HR TCH succ seiz for norm assign
001108 or 001109 or 001110 or 001111 or 001112 or 001113
FR TCH speech FR ver 1FR TCH speech FR ver 2FR TCH speech FR ver 3HR TCH speech HR ver 1HR TCH speech HR ver 2HR TCH speech HR ver 3
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Figure 52. Unsuccessful forced release
MSC:BSC:BTS:MS:
TCH requests 001010
Clear command
Channel release
Deactive SACCHDisc
UaRelease indication
Rf channel releaseRf channel release ack
Clear complete
Physical context confirm
Queueing indication
New call coming with priority subscriber
Basic call signalling, see figure 1
TCH req for norm assign 001026
Ass req that can cause forced rel 001054
001102 or 001103 or 001104 or
001105
FR TCH requestsHR TCH requestsFR pref TCH requestsHR pref TCH requests
TCH seiz att for MOCTCH seiz att for MTC
001137 or 001138
001120 or 001121
FR TCH req rej due HR trafficHR TCH req rej due FR traffic
No free TCH channel
Assignment failure
No suitable TCH for release, forced release timer expires
TCH req with prior subscriber 001095
FR TCH req rej due to lackHR TCH req rej due to lack
001118 or 001119
Forced rel req rej 001058
TCH req rej due to lack 001011TCH req rej due to cong 001141
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Figure 53. Unsuccessful forced release with external handover
MSC:BSC:BTS:MS:
TCH requests 001010
Meas report Meas result HO requiredHO request
Queuing indication
Priority call going on the TCH channel
Clear command
Rf channel release
Rf channel release ack
HO failure
Clear complete
HO measurement, HO decision
New TCH channel reservation and activation in new BSC
Att to req HO with forced rel 001062
TCH req with prior subscriber 001095
001102
001103
001104
001105
FR TCH requestsor HR TCH requestsor FR pref TCH requestsor HR pref TCH requests
001120
001121
FR TCH req rej due HR trafficor HR TCH req rej due FR traffic
No suitable TCH for forced release, forced release timer exp ires
001119FR TCH req rej due to lackor HR TCH req rej due to lack
TCH req rej due to lack 001011
HO req rej with forced release 001066
Call continuous on the old channel
001118
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Figure 54. Successful forced handover
MSC:BSC:BTS:MS:
TCH req for norm assign 001026
TCH requests 001010
Ass req that can cause forced HO 001055
New call coming with priority subscriber
Call going on the TCH channel
Channel activation
Physical context confirm
No free TCH channel, call with lower priority is forced HO
Queueing indication
001102
001103
001104
001105
FR TCH requestsor HR TCH requestsor
FR pref TCH requestsor HR pref TCH requests
001137
001138
TCH seiz att for MOCor TCH seiz att for MTC
001120
001121
FR TCH req rej due HR trafficor HR TCH req rej due FR traffic
Normal internal inter cell HO, see figure 35
Released TCH channel is allocated for the priority call
TCH succ req in norm assign 001009
Forced HO 001071
001106
001107
FR TCH succ seizor
HR TCH succ seiz
001114
001115
FR TCH succ seiz for norm assignor HR TCH succ seiz for norm assign
Signalling continuous like basic call, see figure 1
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Figure 55. Unsuccessful forced handover
MSC:BSC:BTS:MS:
TCH req rej due to lack 001011
TCH requests 001010
New call coming with
Calls going on the TCH channel
Clear complete
Forced handover timer expires
Physical context confirm
No free TCH channel,
Assignment failureClear command
Channel releaseDeactive SACCHDisc
Ua Release indicationRf channel release
Rf channel release ack
Queueing indication
TCH req for norm assign 001026
Ass req that can cause forced HO 001055
TCH req with prior subscriber 001095
001102
001103
001104001105
FR TCH requestsor HR TCH requestsor
FR pref TCH requestsor HR pref TCH requests
001137
001138
TCH seiz att for MOCor TCH seiz att for MTC
001120
001121
FR TCH req rej due HR trafficor HR TCH req rej due FR traffic
001118
001119
FR TCH req rej due to lackor HR TCH req rej due to lack
TCH req rej due to cong 001141
Forced HO req rejected 001059
no suitable calls for forced HO
priority subscriber
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Figure 56. Unsuccessful forced handover with external handover
MSC:BSC:BTS:MS:
TCH req rej due to lack 001011
TCH req with prior subscriber 001095
TCH requests 001010
Att to req HO with forced HO 001063
HO req rej with forced HO 001067
Meas report Meas result HO required
HO request
HO measurement, HO decision
Queuing indication
New TCH channel reservation
No suitable TCH for forced handover,
Priority call going on the TCH channel
Call continuous on the old channel
Clear command
Rf channel release
Rf channel release ack
HO failure
Clear complete
001102
001103
001104
001105
FR TCH requestsor HR TCH requestsor FR pref TCH requestsor HR pref TCH requests
001120
001121
FR TCH req rej due HR trafficor HR TCH req rej due FR traffic
001118
001119
FR TCH req rej due to lackor HR TCH req rej due to lack
forced handover timer expires
and activation in new BSC
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Figure 57. Reconfiguration from TCH to SDCCH
MSC:BSC:BTS:MS:
SDCCH attempt 001000
Channel requestChannel required
Channel activation
Paging part
Radio access part on CCCH
001135
001136
SDCCH seiz att for MOCor SDCCH seiz att for MTC
Reconfiguration from idle TCH to active SDCCH
Dynamic SDCCH reconf attempt 001154
SDCCH succ seiz for imm assign 001007
Basic call signalling continuos, see figure 1
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Figure 58. Normal call
MSC:BSC:BTS:MS:
Succ TCH seiz for ass complete 001148
Basic call signalling, see figure 1
Basic call signalling, see figure 1
TCH seized, FACCH signalling part
Assignment complete
Assignment complete
Sabm
Ua
Establish indication
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Figure 60. Successful internal inter-cell handover for HSCSD, target cellallocations and activations for three channels
MSC:BSC:BTS:MS:
HSCSD TCH request for HO 001161
HSCSD transp TCH request 001158
HSCSD TCH request with 14,4 001156
Meas report Meas result
Sabm Establish indication
HO measurement, Old TCH channel in the old BTS
Channel activation
Channel activation ack
Signalling on the old TCH channel in the old BTS
HO commandHO command
HO access HO detection
Physical info
Ua
Rr HO performed
Rf channel release
Rf channel release ack
HO complete HO complete
Channel activation
Channel activation ack
Channel activation
Channel activation ack
New TCH channel reservation and activation in the new BTS
Normal handover counters are updated, see figure 35
HSCSD succ TCH seiz with 14,4 001157
HSCSD succ transp TCH seiz 001159
HSCSD succ TCH seiz for HO 001163
Signalling on the new TCH channel in the new BTS
Old TCH channel release in the old BTS
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Figure 61. A CONNECTION_FAILURE message which comes during an
HSCSD
MSC:BSC:BTS:MS:
Failure
HSCSD conn rel due to fail 001164
Rf channel rel ack
Conversation phase
Clear request
Disc
Ua
Channel release
Release indicationRf channel release
Connection failure
Clear commandClear complete
Deactive SACCH
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Figure 62. Internal intra-cell direct access from a regular DCCH to the super-reuse TRX. Optional software direct access to super-reuse TRX inIUO activated.
MSC:BSC:BTS:MS:
Succ TCH seiz for dir acc 1165
Assignment request
Physical context request
Sabm Establish indication
Basic call signalling, see figure 1
Channel activation
Channel activation ack
Physical context confirm
Assignment command
Assignment command
Ua
Rr
Assignment complete
Rf channel release
Rf channel release ack
Assignment complete Assignment complete
Alert Alert
Connect ackConnect ack
Connect Connect
Physical context information
Direct access to super-reuse TRX
TCH reservation and activation
Signalling on SDCCH
Signalling on FACCH - TCH
SDCCH release
Connection
Conversation phase
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Figure 63. Unsuccessful internal intra-cell direct access from regular DCCH tothe super-reuse TRX due to lack of resources. Optional softwaredirect access to super-reuse TRX in IUO activated.
MSC:BSC:BTS:MS:
TCH req for dir acc rej due lack 1166
Assignment request
Physical context request
Basic call signalling, see figure 1
Physical context confirm
Physical context information
Unsuccessful direct access attempt to super-reuse TRX
Signalling continuous on old channel
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Figure 64. Timer T3107 expires while waiting for ASSIGNMENT_COMPLETEmessage
MSC:BSC:BTS:MS:
TCH transact end due radio fail 001013
Timer T3107 expires
Start timer T3107
SDCCH Rf channel relSDCCH Rf channel rel ack
Rf channel rel ack
Assignment failureClear command
Channel release
Deactive SACCHDisc
UaRelease indication
Clear complete
Physical context request Assignment request
Physical context confirm
Channel activation
Rf channel rel
Basic call signalling, see figure 1
Channel activation ackAssignment command
Assignment commandSabm
Establish indicationUa
001108
001109
001110
001111
001112
001113
FR TCH speech FR ver 1or FR TCH speech FR ver 2or FR TCH speech FR ver 3or HR TCH speech HR ver 1or HR TCH speech HR ver 2or HR TCH speech HR ver 3
001133001134
FR TCH transactions failor HR TCH transactions fail
TCH rel due radio fail 001139
TCH rel due rad fail PH 2-3 001205
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Figure 65. Average counter updating
MSC:BSC:BTS:MS:
Timer is started
After 20 seconds
Timer expires
Timer is started again
After 20 seconds
Timer expiresAverage queue length for channelseizure request
Average queue length for channelseizure request
1018
1018
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Figure 66. Successful handover due to DADL/B
Figure 67. Unsuccessful DADL/B handover due to lack of resources
BTS: MSC:MS: BSC:
Succ TCH seiz for DADL/B HO001170
DADL/B start due to exceeded load001172
Channel activationChannel activation ack
Assignment request
Physical context request
Physical context confirm
Signalling
Signalling continues
BTS: MSC:MS: BSC:
TCH request in DADL/B HO rejected001171
DADL/B start due to exceeded load001172
Assignment request
Physical context request
Physical context confirm
Signalling
DR and queuing possible
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Figure 70. Dropped call between ASSIGNMENT COMPLETE andDISCONNECT
MSC:BSC:BTS:MS:
Paging/initial MS on CCCH
Clear request
Channel release
Clear command
Clear complete
Deactive SACCH
MM signalling
Basic assignment
AlertAlert
ConnectConnect
Connect ack Connect ack
Conversation
Radio Link Failure
Connection failure
DISC
UA
Release indication
RF channel release
001108FR TCH speech FR ver 1or FR TCH speech FR ver 2or FR TCH speech FR ver 3or HR TCH speech HR ver 1or HR TCH speech HR ver 2or HR TCH speech HR ver 3
001109
001110
001111
001112
001113
TCH transact end due radio fail
001012
TCH Abis problDrop after TCH assign
Drop TCH asscompl to RFCH rel
001013
TCH transact end due BSS probl
001045001202
001204
RF channel release ack
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Related topics
1 Traffic Measurement
Counters of Traffic Measurement
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4 Signalling charts of Dual Transfer ModeThe following figures show the signalling charts of Dual Transfer Mode:
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Figure 72. MO DTM call establishment
MS BTS BSC MSC
MEASUREMENT REPORT
CHANNEL ACTIVATION
CHANNEL ACTIVATION ACK
SABMESTABLISH INDICATIONUA
ASSIGNMENT COMPLETE
RR
HANDOVER PERFORMED
RF CHANNEL RELEASE
RF CHANNEL RELEASE ACK
106000 MO_DTM_CALL_REQUESTS_INI
DTM REQUEST
MEASUREMENT RESULT
PHYSICAL CONTEXT REQUEST
PHYSICAL CONTEXT CONFIRM
DTM ASSIGNMENT COMMAND
105016 DTM_REQ_1_UL_PS_TSL or 105017 DTM_REQ_2_UL_PS_TSL
105009 DTM_ALLOCATIONS_INITIAL
105015 PEAK_DTM_CS_SIMULTAN
105021 DTM_ALLOC_1_UL_PS_TSL or 105022 DTM_ALLOC_2_UL_PS_TSL
Start T3107
051189 INTRA_DTM_MO_CS_TO_PS
106018 DTM_ASSIGN_COMMANDS
071038 REPORTING_TIME_BY_DTM_MS
071037 TCH_RESERV_BY_DTM_MS
MS in dedicated mode
PS data transfer in dual transfer mode
Stop T3107
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Figure 73. MT DTM call establishment
MS BTS BSC MSC
SABM
UA
RR
105000 MT_DTM_CALL_REQUESTS_INI
SGSN
LLC PDU
MEASUREMENTREPORT MEASUREMENT RESULT
PHYSICAL CONTEXT REQUEST
CHANNEL ACTIVATION ACK
ASSIGNMENT COMPLETE
HANDOVER PERFORMED
RF CHANNEL RELEASE ACK
DTM ASSIGNMENT COMMAND
CHANNEL ACTIVATION
RF CHANNEL RELEASE
PHYSICAL CONTEXT CONFIRM
ESTABLISH INDICATION
105009 DTM_ALLOCATIONS_INITIAL
105023 DTM_ALLOC_1_DL_PS_TSL or 105024 DTM_ALLOC_2_DL_PS_TSL
106018 DTM_ASSIGN_COMMANDS
051190 INTRA_DTM_MT_CS_TO_PS
071038 REPORTING_TIME_BY_DTM_MS
071037 TCH_RESERV_BY_DTM_MS
105018 DTM_REQ_1_DL_PS_TSL or 105019 DTM_REQ_2_DL_PS_TSL
MS in dedicated mode
PS data transfer in dual transfer mode
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Figure 74. DTM call reallocation; too high CS connection interference
MS BTS BSC MSC
MEASUREMENT REPORT
CHANNEL ACTIVATION
CHANNEL ACTIVATION ACK
DTM ASSIGNMENT COMMAND
SABM
ESTABLISH INDICATION
UA
ASSIGNMENT COMPLETE
RRHANDOVER PERFORMED
RF CHANNEL RELEASE
RF CHANNEL RELEASE ACK
071038 REPORTING_TIME_BY_DTM_MS
MEASUREMENT RESULT
CS connection controldetects too high CSconnection interference
PHYSICAL CONTEXT REQUEST
PHYSICAL CONTEXT CONFIRM
071037 TCH_RESERV_BY_DTM_MS
106018 DTM_ASSIGN_COMMANDS
106006 DTM_REALLO_CS_REQUESTS
MS has a DTM allocation with one UL PS TSL allocation
DTM call continues on the new resources
105010 DTM_REALLOCATIONS
105016 DTM_REQ_1_UL_PS_TSL or 105017 DTM_REQ_2_UL_PS_TSL
105021 DTM_ALLOC_1_UL_PS_TSL or 105022 DTM_ALLOC_2_UL_PS_TSL
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Figure 75. DTM call reallocation; inadequate PS connection quality
MS BTS BSC MSC
CHANNEL ACTIVATION
CHANNEL ACTIVATION ACK
SABMESTABLISH INDICATION
UA
ASSIGNMENT COMPLETE
RR
HANDOVER PERFORMED
RF CHANNEL RELEASE
RF CHANNEL RELEASE ACK
MEASUREMENT REPORT
071038 REPORTING_TIME_BY_DTM_MS
PS quality control detectsinadequate quality
MEASUREMENT RESULT
PHYSICAL CONTEXT CONFIRM
PHYSICAL CONTEXT REQUEST
DTM ASSIGNMENT COMMAND
071037 TCH_RESERV_BY_DTM_MS
051191 INTRA_DTM_MT_PS_TO_PS
106018 DTM_ASSIGN_COMMANDS
105010 DTM_REALLOCATIONS
105005 DTM_REALLO_REQ_PS_QUAL
MS has a DTM allocation with one UL PS TSL allocation
DTM call continues on the new resources
105018 DTM_REQ_1_DL_PS_TSL or 105019 DTM_REQ_2_DL_PS_TSL
105023 DTM_ALLOC_1_DL_PS_TSL or 105024 DTM_ALLOC_1_DL_PS_TSL
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Figure 76. DTM call; internal inter-cell handover; CS connection power budget
BTS1 BTS2 BSC MSC
CHANNEL ACTIVATION
HANDOVER ACCESS
MS
PHYSICAL INFO
SABM
UA
RR
DTM INFORMATION
MS has a DTM allocation
RF CHANNEL RELEASE ACK
CHANNEL ACTIVATION ACK
MEASUREMENT REPORTMEASUREMENT RESULT
CS connection control startsa power budget handover
HANDOVER COMMAND
HANDOVER DETECTION
ESTABLISH INDICATION
HANDOVER COMPLETEHANDOVER PERFORMED
RF CHANNEL RELEASE
CS connection continues in the CS territory of the target ce ll.The DTM call is then re-established in the target cell.
105011 DTM_DURATION_SUM_FR
004199 DTM_CALL_HO_SUCC_TO_DTM_CELL
072202 DL_TBF_RELEASES_DUE_DTM
072201 UL_TBF_RELEASES_DUE_DTM
004198 DTM_CALL_HO_ATT_TO_DTM_CELL
106013 DTM_RELEASES_DUE_CS_HO
071037 TCH_RESERV_BY_DTM_MS
071038 REPORTING_TIME_BY_DTM_MS
HANDOVER COMPLETE
004194 DTM_CALL_HO_FROM_DTM_CELL
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Figure 77. DTM call; internal inter-cell handover; lack of resources in the PSterritory
BTS1 BTS2 BSC MSC
HANDOVER ACCESS
MS
PHYSICAL INFO
SABM
UA
RR
DTM INFORMATION
CHANNEL ACTIVATION ACK
RF CHANNEL RELEASE ACK
HANDOVER PERFORMED
CHANNEL ACTIVATION
HANDOVER COMMAND
HANDOVER DETECTION
ESTABLISH INDICATION
HANDOVER COMPLETE
HANDOVER COMPLETE
RF CHANNEL RELEASE
004194 DTM_CALL_HO_FROM_DTM_CELL
004199 DTM_CALL_HO_SUCC_TO_DTM_CELL
004198 DTM_CALL_HO_ATT_TO_DTM_CELL
004195DTM_HO_DUE_LACK_OF_RESOURCES
072201 UL_TBF_RELEASES_DUE_DTM
072202 DL_TBF_RELEASES_DUE_DTM
105011 DTM_DURATION_SUM_FR
071038 REPORTING_TIME_BY_DTM_MS
071037 TCH_RESERV_BY_DTM_MS
106013 DTM_RELEASES_DUE_CS_HO
No free resources in the PS territory
CS connection continues in the CS territory of the target ce ll.The DTM call is then re-established in the target cell.
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Figure 78. DTM call; external handover, source BSC
MS BTS BSC MSC
RF CHANNEL RELEASE
RF CHANNEL RELEASE ACK
MEASUREMENT RESULT
MEASUREMENT REPORT
HANDOVER REQUIRED
HANDOVER COMMAND
CLEAR COMMAND
CLEAR COMPLETE
004199 DTM_CALL_HO_SUCC_TO_DTM_CELL
071038 REPORTING_TIME_BY_DTM_MS
071037 TCH_RESERV_BY_DTM_MS
106013 DTM_RELEASES_DUE_CS_HO
072202 DL_TBF_RELEASES_DUE_DTM
105011 DTM_DURATION_SUM_FR
072201 UL_TBF_RELEASES_DUE_DTM
004198 DTM_CALL_HO_ATT_TO_DTM_CELL
MS has a DTM allocation
Channel reservation and activation in the target BSC
HO signalling in the target BSC
CS connection continues in the CS territory of the target ce ll.The DTM call is then re-established in the target cell.
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Figure 79. DTM call; external handover, target BSC
MS BTS BSC MSC
CHANNEL ACTIVATION
CHANNEL ACTIVATION ACK
HANDOVER ACCESS
HANDOVER DETECTION
PHYSICAL INFO
SABM
ESTABLISH INDICATION
UA
HANDOVER COMPLETE
RR
DTM INFORMATION
HANDOVER REQUEST
HANDOVER REQUESTACKNOWLEDGE
External handover decision in the source BSC
HO signalling in the source BSC, the MSC sends a HO command
Old resources released in the source BSC
The DTM call is then re-established in the target cell.CS connection continues in the CS territory of the target ce ll.
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Figure 81. DTM call release; packet data transfer end
MS BTS BSC MSC
SABM
UA
106011 DTM_RELEASES_DUE_PS_RELEASE
SGSN
Last LLC PDU
RR
DL Data Frame (final block), polling
UNACK MODE: Packet Control Ack
ASSIGNMENT COMMAND
PHYSICAL CONTEXT REQUEST
ASSIGNMENT COMPLETE
HANDOVER PERFORMED
RF CHANNEL RELEASE ACK
ACK MODE: (EGPRS) Packet DL Ack /Nack (final ack)
PHYSICAL CONTEXT CONFIRM
CHANNEL ACTIVATION ACK
CHANNEL ACTIVATION
ESTABLISH INDICATION
RF CHANNEL RELEASE
051192 INTRA_DTM_PS_TO_CS
105011 DTM_DURATION_SUM_FR
071038 REPORTING_TIME_BY_DTM_MS
071037 TCH_RESERV_BY_DTM_MS
CS connection continues in the CS territory
MS has a DTM allocation with ongoing UL and/or DL TBFs
RR
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Figure 82. DTM REQUEST rejected when IMSI data not available
MS BTS BSC MSCCHANNEL REQUEST
CHANNEL ACTIVATIONCHANNEL ACTIVATION ACK
IMMEDIATE ASSIGNMENT
SABMESTABLISH INDICATION
UA
CLASSMARK CHANGE
CHANNEL ACTIVATION
CHANNEL ACTIVATION ACK
ASSIGNMENT COMMAND
SABMESTABLISH INDICATION
UA
ASSIGNMENT COMPLETE
DTM REQUEST
RF CHANNEL RELEASE
RF CHANNEL RELEASE ACK
CONNECT ACKCONNECT
DTM REJECT
106002 MO_DTM_CALL_REJECTS_INI
GPRS INFORMATION
SETUP
CALL PROCEEDING
ALERT
RR
SGSN
LLC PDU
CM SERVICE REQUESTCLASSMARK UPDATE
COMMON ID (not received)
106000 MO_DTM_CALL_REQUESTS_INI
106017 DTM_IMSI_NOT_ AVAILABLE
PHYSICAL CONTEXT REQUEST
PHYSICAL CONTEXT CONFIRM
Authentication, identity request and ciphering
MS continues in dedicated mode.
ASSIGNMENT REQUEST
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Figure 84. Unsuccessful MT DTM; activation of a CS TCH in the PS territoryfails, timer expires while waiting for CHANNEL ACTIVATION ACK
SGSNMS BTS BSC
MEASUREMENT REPORT
CHANNEL ACTIVATION
Start T9103
T9103 expires
RF CHANNEL RELEASE
RF CHANNEL RELEASE ACK
105000 MT_DTM_CALL_REQUESTS_INI
DL LLC PDU
MEASUREMENT RESULT
PHYSICAL CONTEXT REQUEST
CHANNEL ACTIVATION ACK (not received)
105015 PEAK_DTM_CS_SIMULTAN
105009 DTM_ALLOCATIONS_INITIAL
105019 DTM_REQ_2_DL_PS_TSL105018 DTM_REQ_1_DL_PS_TSL or
105023 DTM_ALLOC_1_DL_PS_TSL or 105024 DTM_ALLOC_2_DL_PS_TSL
105002 MT_DTM_CALL_REJECTS_INI
072202 DL_TBF_RELEASES_DUE_DTM
PHYSICAL CONTEXT CONFIRM
MS in dedicated mode
CS call continues on the old TCH channel
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Figure 85. Unsuccessful MT DTM; DTM ASSIGNMENT FAILURE received
MS BTS BSC
SABM
ESTABLISH INDICATION
UA
DTM ASSIGNMENT FAILURE
RF CHANNEL RELEASE
RF CHANNEL RELEASE ACK
RR
DTM ASSIGNMENT COMMAND
072202 DL_TBF_RELEASES_DUE_DTM
106008 DTM_ASSIGN_FAILURES_INI
106018 DTM_ASSIGN_COMMANDS
CS call continues on the old TCH channel
MT DTM call establishment started; see MT DTM scenario until DTM ASSIGNMENT COMMANDin figure MT DTM call establishment
105011 DTM_DURATION_SUM_FR
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Figure 86. Timer T3107 expires while waiting for ASSIGNMENT COMPLETE
MS BTS BSC MSC
SABMESTABLISH INDICATION
RF CHANNEL RELEASE
RF CHANNEL RELEASE ACK
RF CHANNEL RELEASE
RF CHANNEL RELEASE ACK
106010 MS_LOST_DURING_ASSIGNMENT
CLEAR REQUEST
CLEAR COMMAND
CLEAR COMPLETE
DTM ASSIGNMENT COMMAND
UAASSIGNMENT COMPLETE (not received)
T3107 expires
106018 DTM_ASSIGN_COMMANDS
071038 REPORTING_TIME_BY_DTM_MS
071037 TCH_RESERV_BY_DTM_MS
Release of the new TCH channel
Release of the old TCH channel
see MT DTM scenario until DTM ASSIGNMENTCOMMAND in figure MT DTM call establishment
Start T3107
CHANNEL RELEASE
DEACTIVATE SACCH
RELEASE INDICATION
105011 DTM_DURATION_SUM_FR
072201 UL_TBF_RELEASES_DUE_DTM or 072202 DL_TBF_RELEASES_DUE_DTM
MO or MT DTM call establishment started;
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Figure 88. DTM CS connection drops after ASSIGNMENT COMPLETE;CONNECTION FAILURE received
MS BTS BSC MSC
HANDOVER PERFORMED
DISC
CLEAR COMMAND
CHANNEL RELEASE
DEACTIVATE SACCH
UA
RF CHANNEL RELEASE ACK
RF CHANNEL RELEASE
RELEASE INDICATION
CLEAR COMPLETE
CONNECTION FAILURECLEAR REQUEST
001234 DROP_DTM_TCH_ASCMPL_RFCH_REL
Radio Link Failure detected
ASSIGNMENT COMPLETE
MS has a DTM allocation with ongoing UL and/or DL TBFs; for example, see figureMO DTM call establishment
001233 DROP_AFTER_DTM_TCH_ASSIGN
071037 TCH_RESERV_BY_DTM_MS
071038 REPORTING_TIME_BY_DTM_MS
105011 DTM_DURATION_SUM_HR
072202 DL_TBF_RELEASES_DUE_DTM072201 UL_TBF_RELEASES_DUE_DTM or
RF CHANNEL RELEASE ACK
RF CHANNEL RELEASE
106014 DTM_RELEASES_DUE_OTHER
051189 INTRA_DTM_MO_CS_TO_PS
071038 REPORTING_TIME_BY_DTM_MS
071037 TCH_RESERV_BY_DTM_MS
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Figure 89. DTM CS connection drops after ASSIGNMENT COMPLETE;RELEASE INDICATION not received
Related topics
. 1 Traffic Measurement
. Counters of Traffic Measurement
MS BTS BSC MSC
RELEASE
RELEASE COMPLETE
CLEAR COMMAND
CHANNEL RELEASE
DEACTIVATE SACCH SCCP RELEASE COMPLETE
SCCP RELEASE
DISCONNECT
RF CHANNEL RELEASE ACK
RF CHANNEL RELEASE
001234 DROP_DTM_TCH_ASCMPL_RFCH_REL
DISC (not received)
RELEASE INDICATION (not received)
T3109 expires
Start T3109
MS has a DTM allocation with ongoing UL and/or DL TBFs; for example, see figureMO DTM call establishment
105011 DTM_DURATION_SUM_FR
072202 DL_TBF_RELEASES_DUE_DTM
072201 UL_TBF_RELEASES_DUE_DTM
CLEAR COMPLETE
106012 DTM_RELEASES_DUE_CS_RELEASE
071038 REPORTING_TIME_BY_DTM_MS
071037 TCH_RESERV_BY_DTM_MS
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. 4 Handover Measurement
. Counters of Handover Measurement
. 51 BSC Level Clear Code (PM) Measurement
. Counters of 51 BSC Level Clear Code (PM) Measurement
. 71 MS Capability Indication Measurement
. Counters of MS Capability Indication Measurement
1 Traffic Measurement