S12-DROP CALL OBSERVATION.pdf

8/10/2019 S12-DROP CALL OBSERVATION.pdf

1/28


2/28

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, orperformance 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.

2 (28) # Nokia Corporation DN0481217Issue 2-0 en

29 Drop Call Breakdown Observation


3/28

Contents

Contents 3

List of tables 4

List of figures 5

Summary of changes 7

1 29 Drop Call Breakdown Observation 9

2 Counters of Drop Call Breakdown Observation 13

DN0481217Issue 2-0 en

# Nokia Corporation 3 (28)

Contents


4/28

List of tables

Table 1. Measurement description of Drop Call Breakdown Observation 9

Table 2. Counters of Drop Call Breakdown Observation 10




5/28

List of figures



List of figures


6/28




7/28

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 2 and 12

Updated fields of all counters have been updated.


New counter 029041 has been added.


New counters 029007-029040 have been added and counters 029000-029006

have been updated.



Summary of changes


8/28




9/28

1 29 Drop Call Breakdown ObservationDrop Call Breakdown observation collects statistics on the dropped calls. The

detailed data of drop is collected when the drop occurs after the

ASSIGNMENT_COMPLETE message. The focus of the observation can be

either the breakdown of counter DROP AFTER TCH ASSIGN or the breakdown

of counter CLEAR REQUEST SENT BY BSC ON TCH.

If the focus of the observation is breakdown of DROP AFTER TCH ASSIGN, the

observation data is reported when the TCH drop occurred between messages

ASSIGNMENT_COMPLETE from BTS and DISCONNECT from MS/MSC. If

the focus of the observation is breakdown of CLEAR REQUEST SENT BY BSC

ON TCH, the observation data is reported when CLEAR_REQUEST message is

sent to MSC between the ASSIGNMENT_COMPLETE from BTS and

CLEAR_COMMAND from MSC messages.

The observation is activated on BSC level and drops are recorded per TRX. The

Drop Call Breakdown Observation data is stored to an observation report disk file

and sent to NetAct in an observation file.

Drop Call Breakdown Observation is optional.

Measurement description

Table 1. Measurement description of Drop Call Breakdown Observation

Measurement

Measurement ID

Measurement abbreviation

Drop Call Breakdown Observation

29

DC_BREAK

Product BSC

Product software release S11.5

Target name

Target description





10/28


11/28

Table 2. Counters of Drop Call Breakdown Observation (cont.)

ADJ CELL LAC 4 029030

ADJ CELL ID 4 029031

RX LEVEL ADJ 4 029032

ADJ CELL PLMN ID 5 029033




ADJ CELL PLMN ID 6 029037




FOCUS OF BREAKDOWN 029041

Related topics

. Counters of Drop Call Breakdown Observation

. BSC Statistics Administration

. BSC Measurement Counters Displaying Program (FOXMEA)

. Performance Measurements

. Call Related DX Causes in BSC

. Drop Call Breakdown Observation



http://-/?-http://-/?-http://-/?-http://-/?-http://-/?-http://-/?-http://-/?-http://-/?-http://-/?-http://-/?-


12/28




13/28

2 Counters of Drop Call BreakdownObservation

Number

Name

Release

029000

BTS ID

S11.5

Description Identification of the BTS where the drop occurred.

Updated When the TCH drop occured between messages

ASSIGNMENT_COMPLETE from BTS and DISCONNECT from MS/

MSC or between messages ASSIGNMENT_COMPLETE from BTS

and CLEAR_COMMAND from MSC.

Dependencies with other counters/

PI(s)

001202 - DROP AFTER TCH ASSIGN

Logical type Variable

Unit Integer number

Number

Name

Release

029001

RELEASE TIME

S11.5

Description Timestamp of the call release (dropped call).

Coded in BCD (Binary Coded Decimal)

Hundredths of seconds : byte

Seconds : byte

Minutes : byte

Hours : byte

Day : byte

Month : byte

Year : word







Counters of Drop Call Breakdown Observation


14/28

Number

Name

Release

029001

RELEASE TIME

S11.5


PI(s)



Unit Integer number

Number

Name

Release

029002

PHASE OUT

S11.5

Description BSC internal phase value of the call release (the phase of the callwhere the drop occurred). See Call Related DX Causes in BSC.






PI(s)



Unit Integer number

Number

Name

Release

029003

CAUSE OUT

S11.5

Description BSC internal cause value of the call release (the drop cause). See

Call Related DX Causes in BSC.





Dependencies with other counters/PI(s)



Unit Integer number




15/28

Number

Name

Release

029004

TRX ID

S11.5

Description Identification of the TRX where the drop occurred.






PI(s)



Unit Integer number

Number

Name

Release

029005

PHASE IN

S11.5

Description BSC internal phase value of the call establishment. See Call Related

DX Causes in BSC.





Dependencies with other counters/PI(s) 001202 - DROP AFTER TCH ASSIGN


Unit Integer number

Number

Name

Release

029006

CAUSE IN

S11.5

Description BSC internal cause value of the call establishment. See Call Related

DX Causes in BSC.






PI(s)



Unit Integer number





16/28

Number

Name

Release

029007

TIMING ADVANCE

S11.5

Description Downlink timing advance.

Updated The timing advance value is an average from the last 4 (four) MS

reports received before the TCH drop occured between messages


MSC or before the TCH drop occured between messages

ASSIGNMENT_COMPLETE from BTS and CLEAR_COMMAND from

MSC.

Logical type Average

Unit Integer number

Number

Name

Release

029008

DL RX LEVEL

S11.5

Description Downlink signal strength.

Updated The DL RX level value is an average from the last 4 (four) MS





MSC.


Unit Integer number

Number

Name

Release

029009

UL RX LEVEL

S11.5

Description Uplink signal strength of the serving cell.

Updated The UL RX level value is an average from the last 4 (four) MS


ASSIGNMENT_COMPLETE from BTS and DISCONNECT from MS/MSC or before the TCH drop occured between messages


MSC.


Unit Integer number




17/28

Number

Name

Release

029010

DL RX QUALITY

S11.5

Description Downlink bit error rate value of the serving cell.

Updated The DL RX quality value is an average from the last 4 (four) MS





MSC.


Unit Integer number

Number

Name

Release

029011

UL RX QUALITY

S11.5

Description Uplink bit error rate value of the serving cell.

Updated The UL RX quality value is an average from the last 4 (four) MS





MSC.


Unit Integer number

Number

Name

Release

029012

DL FER

S11.5

Description Downlink frame erasure value of the serving cell.

Updated The DL FER value is an average from the last 4 (four) MS reports

received before the TCH drop occured between messages

ASSIGNMENT_COMPLETE from BTS and DISCONNECT from MS/MSC or before the TCH drop occured between messages


MSC.


Unit Integer number





18/28

Number

Name

Release

029013

UL FER

S11.5

Description Uplink frame erasure value of the serving cell.

Updated The UL FER value is an average from the last 4 (four) MS reports

received before the TCH drop occured between messages




MSC.


Unit Integer number

Number

Name

Release

029014

DL LAST USED BITRATE

S11.5

Description The last bit rate used in downlink direction when the TCH drop

occurred.

Values:

0x05 = AMR HR speech, 7.4 kbit/s





0x0A = AMR FR speech, 12.2 kbit/s

0x0B = AMR FR speech, 10.2 kbit/s

0x0C = AMR FR speech, 7.95 kbit/s

0x0D = AMR FR speech, 7.4 kbit/s

0x0E = AMR FR speech, 6.7 kbit/s

0x0F = AMR FR speech, 5.9 kbit/s

0x10 = AMR FR speech, 5.15 kbit/s

0x11 = AMR FR speech, 4.75 kbit/s.






Unit Integer number




19/28

Number

Name

Release

029015

UL LAST USED BITRATE

S11.5

Description The last bit rate used in uplink direction when the TCH drop

occurred.

Values:






0x0A = AMR FR speech, 12.2 kbit/s

0x0B = AMR FR speech, 10.2 kbit/s

0x0C = AMR FR speech, 7.95 kbit/s

0x0D = AMR FR speech, 7.4 kbit/s

0x0E = AMR FR speech, 6.7 kbit/s

0x0F = AMR FR speech, 5.9 kbit/s








Unit Integer number

Number

Name

Release

029016

SUDDEN DROP

S11.5

Description This counter indicates whether the last 4 (four) MS reports have

been completely lost or not.Values:

0 = at least 1 (one) of the last 4 (four) MS reports have been

received at least partly.

1 = all of the last 4 (four) MS reports are completely missing.

Counters 029007-029015 and 029017-029040 are updated with the

values from the last received MS report whenever this counter is

updated with value 1.





20/28

Number

Name

Release

029016

SUDDEN DROP

S11.5






Unit Integer number

Number

Name

Release

029017

ADJ CELL PLMN ID 1

S11.5

Description PLMN ID of the strongest adjacent cell.

Updated The PLMN ID value is based on the last received MS report before

the TCH drop occured between messages




MSC.


Unit Integer number

Number

Name

Release

029018

ADJ CELL LAC 1

S11.5

Description LAC of the strongest adjacent cell.

Updated The LAC value is based on the last received MS report before the

TCH drop occured between messages ASSIGNMENT_COMPLETE

from BTS and DISCONNECT from MS/MSC or before the TCH drop

occured between messages ASSIGNMENT_COMPLETE from BTS



Unit Integer number




21/28

Number

Name

Release

029019

ADJ CELL ID 1

S11.5

Description Cell ID of the strongest adjacent cell.

Updated The Cell ID value is based on the last received MS report before the






Unit Integer number

NumberName

Release

029020RX LEVEL ADJ 1

S11.5

Description RX level value of the strongest adjacent cell.

Updated The RX level value is based on the last received MS report before





MSC.


Unit Integer number

Number

Name

Release

029021

ADJ CELL PLMN ID 2

S11.5

Description PLMN ID of the 2nd strongest adjacent cell.




MSC or before the TCH drop occured between messagesASSIGNMENT_COMPLETE from BTS and CLEAR_COMMAND from

MSC.


Unit Integer number





22/28

Number

Name

Release

029022

ADJ CELL LAC 2

S11.5

Description LAC of the 2nd strongest adjacent cell.







Unit Integer number

NumberName

Release

029023ADJ CELL ID 2

S11.5

Description Cell ID of the 2nd strongest adjacent cell.







Unit Integer number

Number

Name

Release

029024

RX LEVEL ADJ 2

S11.5

Description RX level value of the 2nd strongest adjacent cell.





ASSIGNMENT_COMPLETE from BTS and CLEAR_COMMAND fromMSC.


Unit Integer number




23/28

Number

Name

Release

029025

ADJ CELL PLMN ID 3

S11.5

Description PLMN ID of the 3rd strongest adjacent cell.






MSC.


Unit Integer number

Number

Name

Release

029026

ADJ CELL LAC 3

S11.5

Description LAC of the 3rd strongest adjacent cell.







Unit Integer number

Number

Name

Release

029027

ADJ CELL ID 3

S11.5

Description Cell ID of the 3rd strongest adjacent cell.




occured between messages ASSIGNMENT_COMPLETE from BTSand CLEAR_COMMAND from MSC.


Unit Integer number





24/28

Number

Name

Release

029028

RX LEVEL ADJ 3

S11.5

Description RX level value of the 3rd strongest adjacent cell.






MSC.


Unit Integer number

Number

Name

Release

029029

ADJ CELL PLMN ID 4

S11.5

Description PLMN ID of the 4th strongest adjacent cell.






MSC.


Unit Integer number

Number

Name

Release

029030

ADJ CELL LAC 4

S11.5

Description LAC of the 4th strongest adjacent cell.



from BTS and DISCONNECT from MS/MSC or before the TCH dropoccured between messages ASSIGNMENT_COMPLETE from BTS



Unit Integer number




25/28

Number

Name

Release

029031

ADJ CELL ID 4

S11.5

Description Cell ID of the 4th strongest adjacent cell.







Unit Integer number

NumberName

Release

029032RX LEVEL ADJ 4

S11.5

Description RX level value of the 4th strongest adjacent cell.






MSC.


Unit Integer number

Number

Name

Release

029033

ADJ CELL PLMN ID 5

S11.5





MSC or before the TCH drop occured between messagesASSIGNMENT_COMPLETE from BTS and CLEAR_COMMAND from

MSC.


Unit Integer number





26/28

Number

Name

Release

029034

ADJ CELL LAC 5

S11.5








Unit Integer number

NumberName

Release

029035ADJ CELL ID 5

S11.5








Unit Integer number

Number

Name

Release

029036

RX LEVEL ADJ 5

S11.5






ASSIGNMENT_COMPLETE from BTS and CLEAR_COMMAND fromMSC.


Unit Integer number




27/28

Number

Name

Release

029037

ADJ CELL PLMN ID 6

S11.5







MSC.


Unit Integer number

Number

Name

Release

029038

ADJ CELL LAC 6

S11.5








Unit Integer number

Number

Name

Release

029039

ADJ CELL ID 6

S11.5





occured between messages ASSIGNMENT_COMPLETE from BTSand CLEAR_COMMAND from MSC.


Unit Integer number





28/28

Number

Name

Release

029040

RX LEVEL ADJ 6

S11.5







MSC.


Unit Integer number

Number

Name

Release

029041

FOCUS OF BREAKDOWN

S11.5

Description Indicates to which counter the drop call breakdown observation is related.

Coding:

1 = breakdown of counter DROPS AFTER TCH ASSIGN

2 = breakdown of counter CLEAR REQUEST SENT BY BSC ON TCH

Updated When the focus of the observation is on the breakdown of the counter

DROPS AFTER TCH ASSIGN, this counter is updated with value 1 when

the counter DROPS AFTER TCH ASSIGN is updated.

When the focus of the observation is on the breakdown of the counter

CLEAR REQUEST SENT BY BSC ON TCH, this counter is updated with

value 2 when the counter CLEAR REQUEST SENT BY BSC ON TCH is

updated.

Dependencies with other

counters/PI(s)

001202 - DROP AFTER TCH ASSIGN, 002071 - CLEAR REQUEST

SENT BY BSC ON TCH, 057044 - DROP AFTER TCH ASSIGNMENT


Unit bytes

Related topics

. 29 Drop Call Breakdown Observation

. Call Related DX Causes in BSC

http://-/?-http://-/?-

Documents

S12-DROP CALL OBSERVATION.pdf