06_RN31586EN10GLA0_HSPA

HSDPA WorkshopHSPA
HSPA Measurements
HSDPA Accessibility ratio
Capacity bottlenecks found and necessary upgrades done -> normal growth again, however still some capacity bottlenecks exist
Both data volume and HS-DSCH selections (HSDPA calls) grow linearly “the same way”
HS-DSCH selections increase but HSDPA data volume remains flat – no growth -> resources shortage somewhere
* © Nokia Siemens Networks RANKPI /BAs / 05.05.2009
………
Transport block (TB)
Higher layer
RNC
Node-B
*More information about the content of the headers of the different PDUs can be found in TS25.321 and TS25.322
Iub
A fixed number of MAC-d
PDUs go into MAC-hs PDU
HSDPA throughput depends on protocol stack from where it is measured
3360 bits (QPSK)
336 bits
336 bits
M5000 HSDPA measurements (inside WBTS)
CQI & HS-SCCH Power distribution
CE counters
FP throughput, error rates & packet loss
HSPA performance analysis counters in RNC
M1000 Cell resource measurements (inside RNC)
non-HSDPA traffic power measurements
M1002 Traffic Measurements (inside RNC)
Allocation of HS-DSCH transport channel
HSDPA setup failures
RLC buffer occupancy
Net RLC throughput
15 or 16 hsdpa users
9 or 10 hsdpa users
7 or 8 hsdpa users
5 or 6 hsdpa users
3 or 4 hsdpa users
1 or 2 hsdpa users
No hsdpa users
HS-SCCH power
The HS-SCCH transmit power is measured by each active TTI (when sending data) in BTS
Each active TTI increments the correct class of the HS-SCCH power distribution
I.e. the number of TTIs (2 ms) in a different class indicate the amount of time spent
M5000C69 HS_SCCH_PWR_DIST_CLASS_0
Number of TTIs matching to power limit of class 0 (lower than 0.1W)
Number of TTIs matching to power limit of class 1 (0.1 W … 0.2W)
Number of TTIs matching to power limit of class 1 (>1.6 W)
M5000C75 HS_SCCH_PWR_SUM The HS-SCCH transmit power is measured by each active TTI (when sending data) in BTS
The sum of HS-DSCH power is updated to all TTIs
Unit is Watt
HS-SCCH power distribution
CQI – Channel Quality Indicator
HS-DSCH Link Adaptation, and HSSCCH power control are based on the instantaneous signal quality information received from the UE, i.e. Channel Quality Indicator, CQI. CQI/LA defines directly the HS-DSCH capacity.
If CQI information is not received for several consecutive times (possible UL problems) the scheduling of the priority queues for that mobile are stopped until CQI from the UE is received again
Based on CQI_DIST_CL_X different kinds of statistical distributions can be calculated and presented to emphasize the Quality aspect
If the BTS cannot decode the CQI counter M5000C39 CQI_FAILED is incremented
M5000C8-C38 trigger on received CQI values 0-30
CQI – Lab test, fading Off
CQI – Lab test, fading On
With fading “on” UEs report much worse channel quality to WBTS packet scheduler
HSDPA MAC-hs Retransmissions
When one MAC-hs PDU is correctly delivered without retransmission or X number of retransmissions and the ack has been received the respective counter below is incremented by one
Number of correctly delivered MAC-hs PDUs that have been done without retransmission matching to "MAC-hs PDU retransmission distribution - class 0“ counter M5000C0 MAC_HS_PDU_RETR_DIST_CL_0 is incremented,
Number of MAC-hs PDU retransmissions matching to "MAC-hs PDU retransmission distribution - class 1" (1 retransmission per PDU) counter M5000C1 MAC_HS_PDU_RETR_DIST_CL_1 is incremented,
Number of MAC-hs PDU retransmissions matching to "MAC-hs PDU retransmission distribution - class 5" (more than 4 retransmission per PDU) counter M5000C1 MAC_HS_PDU_RETR_DIST_CL_5 is incremented
Discarded MAC-hs PDUs
In case the T1 timer expires for certain MAC-d flow then all the non acknowledged MAC-hs PDUs are cleared
In case the max number of retransmissions (3 [RAS05; 6 [RAS05.1]) is exceeded for certain HARQ flow the corresponding MAC-hs is cleared
When the MAC-hs PDU is discarded due to T1 timer counter M5000C46 DISC_MAC_HS_PDU_T1 is incremented
When the MAC-hs PDU is discarded due to maximum number of retransmissions counter
M5000C47 DISC_MAC_HS_PDU_MAX_RETRANS is incremented
HSDPA Data Volume and Throughput
BTS measures the number of incoming PDU in DL direction as well as buffer overflows
Transferred data volume at Iub can be calculated as:
The BTS counts the total number of received MAC-d PDUs with the counter M5000C7 MAC_D_PDU_TOT
M5000C6 MAC_D_PDU_DROP_BTS_OWFL counter is incremented by the BTS when MAC-d PDU is dropped from BTS buffer due to overflow of the buffer
RNC_608b =
HSDPA Data Volume and Throughput
HSDPA data service officially launched
HSDPA allocation & signalling flow
HSDPA Traffic measurements (M1002)
M1002C503 ALLO_DUR_DSCH_RET_16_INT
M1002C504 ALLO_DUR_DSCH_RET_16_BGR
When RNC successfully allocates A-DCH return channel bearer 16, 64, 128 or 384 kbps
duration is counted based on 1 second sampling interval
Associated DCH can be pre-empted by Rel99 RT DCH request – following counters are updated:
M1002C478 REL_ALLO_HS_DSCH_PRE_EMP_INT
M1002C481 REL_ALLO_HS_DSCH_PRE_EMP_BGR
HSDPA channel will be switched to Rel 99 NRT DCH
HSDPA Activation, Cell DCH – HS-DSCH transaction
UE
RNC
The number of failed allocations for the HS-DSCH transport channel due to lack of radio resources for the UL DCH return channel for interactive or background class connections :
M1002C401 REJ_HS_DSCH_RET_INT
M1002C402 REJ_HS_DSCH_RET_BGR
After rejection the capacity request is sent back to the PS queue and the HS-DSCH channel type is not allowed for this capacity request any more.
AC to check to accept or reject Capacity request
The number of times when the DCH channel type is selected for interactive class connections due to maximum amount of HSDPA users in the cell:
M1002C476 DCH_SEL_MAX_HSDPA_USERS_BGR
M1002C477 DCH_SEL_MAX_HSDPA_USERS_INT
Normal PS RAB Setup for Background or Interactive class as in pre-RAS05
Radio Link Reconfigure Failure
Measurement Report : e4a
RNC
The number of HS-DSCH setup failures due to BTS in the SRNC for interactive or background class connections:
M1002C416 SETUP_FAIL_BTS_HS_DSCH_INT or
M1002C424 SETUP_FAIL_BTS_HS_DSCH_BGR
When the RNC receives an NBAP: RADIO LINK RECONFIGURATION FAILURE or NBAP: RADIO LINK SETUP FAILURE (Cell_FACH to Cell_DCH:HSDSCH state transition) message during the transition to HS-DSCH or a timer waiting for the acknowledgement message to expire
Radio Link Reconfigure Ready
RNC
The number of HS-DSCH setup failures due to 16, 64,128 or 384 kbps return channel Iub transport (AAL2) in the SRNC for interactive or background class connections, counter:
M1002C505 SETUP_FAIL_16_IUB_HSDSCH_INT or
M1002C506 SETUP_FAIL_16_IUB_HSDSCH_BGR or
M1002C418 SETUP_FAIL_64_IUB_HSDSCH_INT or
If return channel Iub reservation fails also MAC-d reservation fails due to Iub and counter M1002C414 SETUP_FAIL_IUB_MAC_D_INT or M1002C422 SETUP_FAIL_IUB_MAC_D_BGR is incremented
The total number of HS-DSCH setup failures due Iub transport (AAL2) in the SRNC for interactive or background class connections, counter:
M1002C417 SETUP_FAIL_IUB_HS_TOTAL_INT or M1002C425 SETUP_FAIL_IUB_HS_TOTAL_BGR.
These counters are equal to the M1002C414+M1002C418+M1002C419+M1002C420 (interactive) or M1002C422+M1002C426+M1002C427+M1002C428 (background)
AAL2SIG:ECF
AAL2SIG:ERQ
RNC
The number of HS-DSCH MAC-d flow setup failures due to Iub transport (AAL2) in the SRNC for interactive or background class connections:
M1002C414 SETUP_FAIL_IUB_MAC_D_INT or M1002C422 SETUP_FAIL_IUB_MAC_D_BGR is incremented
AAL2SIG:ECF
AAL2SIG:ERQ
RRC: Radio Bearer Reconfiguration Failure (DCH)
UE
When the RNC has received an RRC: RADIO BEARER RECONFIGURATION FAILURE message from the UE during the HS-DSCH setup or a timer waiting for the RRC: RADIO BEARER RECONFIGURATION COMPLETE message to expire, counter M1002C415 SETUP_FAIL_UE_HS_DSCH_INT or M1002C423 SETUP_FAIL_UE_HS_DSCH_BGR, is incremented
AAL2SIG:ECF
AAL2SIG:ERQ
RRC: Radio Bearer Reconfiguration Complete (DCH)
UE
If at any time during the HS-DSCH setup the RNC decides to reject the HS-DSCH setup (including RNC internal transport), the counter:
M1002C413 SETUP_FAIL_RNC_HS_DSCH_INT
AAL2SIG:ECF
AAL2SIG:ERQ
Measurement Control
RNC
AAL2SIG:ECF
AAL2SIG:ERQ
When the RNC has received an RRC: RADIO BEARER RECONFIGURATION COMPLETE message from the UE - after successful HS-DSCH MAC-d flow setup for interactive or background traffic class, counter: M1002C385 ALLO_HS_DSCH_FLOW_INT or M1002C389 ALLO_HS_DSCH_FLOW_BGR , is incremented
When the RNC has received an RRC: RADIO BEARER RECONFIGURATION COMPLETE message from the UE - after successful HS-DSCH return channel setup or bit rate modification, counter:
M1002C501 ALLO_HS_DSCH_RET_16_INT, M1002C502 ALLO_HSDSCH_RET_16_BGR, M1002C386 ALLO_HS_DSCH_RET_64_INT M1002C390 ALLO_HS_DSCH_RET_64_BGR ,
M1002C387 ALLO_HS_DSCH_RET_128_INT, M1002C391 ALLO_HS_DSCH_RET_128_BGR M1002C388 ALLO_HS_DSCH_RET_384_INT, M1002C392 ALLO_HS_DSCH_RET_384_BGR is incremented.
The sum of HS-DSCH MAC-d flow allocation durations in the SRNC for interactive or background class connections is updated with a 1-second sampling interval during the MAC-d flow allocation time:
M1002C393 ALLO_DUR_HS_DSCH_FLOW_INT or
M1002C397 ALLO_DUR_HS_DSCH_FLOW_BGR
The sum of 64, 128 or 384 kbps return channel allocation durations in the SRNC for interactive or background class connections is updated with a 1-second sampling interval during the DCH allocation time:
M1002C503 ALLO_DUR_HS_DSCH_RET_16_INT,
M1002C504 ALLO_DUR_HS_DSCH_RET16_BGR,
M1002C398 ALLO_DUR_HS_DSCH_RET_64_BGR,
M1002C399 ALLO_DUR_HS_DSCH_RET_128_BGR,
M1002C400 ALLO_DUR_HS_DSCH_RET_384_BGR
AAL2SIG:ECF
AAL2SIG:ERQ
Measurement Control
RNC
AAL2SIG:ECF
AAL2SIG:ERQ
The number of DCH allocations with interactive OR background class due to HSDPA return channel (DCH UL) upgrade, counter:
M1002C429 HS_DSCH_RET_UPGRADE_INT or
AC to check to accept or reject Capacity UPGRADE or initiate capacity downgrade due to any interface blocking
AAL2SIG:ECF
AAL2SIG:ERQ
Radio Link Reconfiguration Commit
The number of DCH allocations with interactive OR background class due to HSDPA return channel (DCH UL) downgrade, counter:
M1002C430 HS_DSCH_RET_DOWNGRADE_INT or
HSDPA Traffic measurements summary (M1002)
HS-DSCH
DCH
M1002C385 ALLO_HS_DSCH_FLOW_INT
M1002C501 ALLO_HS_DSCH_RET_16_INT
M1002C389 ALLO_HS_DSCH_FLOW_BGR
M1002C502 ALLO_HS_DSCH_RET_16_BGR
CR
M1022C27-C30 count DCH allocations after HS requests
Successful HS Setups
Successful DCH Setups
M1022C9-M1022C20 same as DCH case
Note: These counters are only incremented in case of initial allocation for terminal has been Cell_FACH (Cell_PCH) or DCH0/0 (counters incremented to main cell only).
Successful Packet Call setup allocations and allocation attempts due to Incoming relocation or Inter-RNC HHOs are not counted separately.
HSDPA Accessibility
RNC_914b HSDPA Setup Success Ratio for NRT traffic
Requests to cell incapable of HSDPA are excluded via the counters
Better to use this than RNC_605a, because RNC_605a may be too pessimistic
Based on M1022 counters:
/
sum([M1022C3] + [M1022C4] + [M1022C5] + [M1022C6] - [M1022C221] - [M1022C220] - [M1022C218] - [M1022C217])
AAL2SIG:ECF
AAL2SIG:ERQ
PDP Established
Measurement Control
HS-DSCH transport in Iub. DL:CAC in RNC already
Setup information for the UE
Decision on the transport, FACH, DCH or HS-DSCH
HSPA call setup signaling
HSPA connection setup
RRC connection setup
Traffic Volume Measurements (TVM) management
Allocation of RB 0/0
Uu interface
IuB interface
Iu interface
HSPA parameters to WBTS via NBAP
HSUPA calculations to RNC via NBAP
TVM setup
TVM stopped
Selected HSUPA Counters
Uplink NRT RB mapped to DCH > 0 kbps
UE capability supports E-DCH
Traffic class and THP allowed on E-DCH
HSDPA mobility enabled and HS-DSCH available
and no IFHO/ISHO measurements
Preliminary E-DCH active set is acceptable
HS-DSCH possible to select in the downlink, PS
# of E-DCH allocations is below the maximum
Yes
No
No
No
No
No
No
No
No
No
Trigger for M1002C519,C520,C601
Trigger for M1002C515,C516,C599
E-DCH Setup failures in M1002
Traffic Class
Failure reason
524
526
Transport
528
523
525
Transport
527
603
604
Transport
605
E-DCH allocations
Succesfull allocations of E-DCH are counted with M1022C21, C22, C190 for IA, BG, STR
Number of users can be followed up with M1000C271-281
Bin size is 2 users
E-DCH Cell Resources
WBTS HSUPA Resource Status – Cell Resources (M1000)
Time of available / unavailable HSUPA Resource Status
M1000C268 BTS_HSUPA_HW_NOT_LIMITED_DUR
Indicates the amount of time that the BTS local cell group is in the
HSUPA not-limited state during the measurement period.
The BTS is not limiting HSUPA throughput.
M1000C269 BTS_HSUPA_HW_LIMITED_DUR
HSUPA limited state during the measurement period. The RNC sets up
the E-DCH but the throughput may be lower than expected.
M1000C270 BTS_HSUPA_NO_HW_CAPA_DUR
HSUPA limited state during the measurement period. The RNC does
not set-up the E-DCH.
E-DCH Cell Resources (M1000)
E-DCH Traffic Measurements (M1002)
M1002C515 UL_DCH_SEL_MAX_HSUPA_USR_INT
M1002C516 UL_DCH_SEL_MAX_HSUPA_USR_BGR
M1002C517 UL_DCH_SEL_BTS_HW_INT
M1002C518 UL_DCH_SEL_BTS_HW_BGR
M1002C519 EDCH_ALLO_CANC_NA_AS_INT
M1002C520 EDCH_ALLO_CANC_NA_AS_BGR
M1002C521 DL_DCH_SEL_HSDPA_POWER_INT
M1002C522 DL_DCH_SEL_HSDPA_POWER_BGR
M1002C531 ALLO_SUCCESS_EDCH_INT
M1002C516 ALLO_SUCCESS_EDCH_BGR
M1002C533 ALLO_DUR_EDCH_INT
M1002C534 ALLO_DUR_EDCH_BGR
HSUPA setup
M1002C523 SETUP_FAIL_EDCH_UE_INT
M1002C524 SETUP_FAIL_EDCH_UE_BGR
M1002C525 SETUP_FAIL_EDCH_BTS_INT
M1002C526 SETUP_FAIL_EDCH_BTS_BGR
M1002C527 SETUP_FAIL_EDCH_TRANS_INT
M1002C528 SETUP_FAIL_EDCH_TRANS_BGR
M1002C529 SETUP_FAIL_EDCH_OTHER_INT
M1002C530 SETUP_FAIL_EDCH_OTHER_BGR
E-DCH Traffic Measurements (M1002)
Thank you!
#
0
500000
1000000
1500000
2000000
2500000
3000000
3500000
4000000
HS_SCCH_PWR_DIST_CLASS_

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06_RN31586EN10GLA0_HSPA