Parameter Standardization Guideline Service Impact
Network Quality Management Group PT.. Telekomunikasi Selular PT Sel ular
Outline •
Background
•
Objective
•
General Concept
•
Detail Parameter
•
Parameter Change Flow Chart
Background
Good
KPI but bad user experience
Many
new sites / new NE implementation with improper parameter
Many Many
in-consistent parameter on existing sites/NE
adjustment on parameter that can improve KPI but effecting worse user experience
Objective
To
Have standard parameter that could impact user experience for all existing & new sites / NE
To
Decrease Gap between KPI achievement and user experience
General Concept
3 Categorize of parameter : 1.
Optimization parameter
2.
Non-Optimization parameter
3.
Non-Optimization parameter (as design)
Non-Optimization parameter will be categorized into service impact & non service impact
Non-Optimization parameter that service impact is parameter that if modified will improve KPI but effecting user experience worse
So these parameter must follow Tsel NPT value
2G RAN Parameter Current Calue
Parameter
NSN
Ericsson
Huawei
ZTE
Recommend Value
Unit
GSM: 33 DCS: 30
dBm
GSM: -105 dBm DCS: -95 dBm
dBm
Remarks
Ms Tx Power Max
msTxPwrMaxGSM : 33 msTxPwrMaxGSM1x00 : 43 gprsMsTxpwrMaxCCH : 33 gprsMsTxPwrMaxCCH1x00 : 43
RxLev Access Min
rxLevAccessMin => GSM : 105, DCS ACCMIN => GSM : 102 , DCS : 95 : 95
TA Max
msMaxDistInCallSetup : 255
BS Tx Power max (attenuation)
bsTxPwrMax, bsTxPwrMax1x 00 : 0 -
AFR Radio Link Timeout
radioLinkTime outAmr : 44
RLINKTAFR (44) & RLINKUPAFR (48) AFR RLT:56
BsRadi oLkTmOutAMRFR : 44
44
Sacch_times Impacted to TCH Drop
AHR Radio Link Timeout
radioLinkTimeoutAmrHr : 44
RLINKTAHR (44) & RLINKUPAHR (48)
AHR RLT:56
BsRadi oLkTmOutAMRHR : 44
44
Sacch_times Impacted to TCH Drop
Radio Link Timeout
radioLinkTimeout => GSM : 36, DCS : 32
RLINKT for Downlink (GSM : 36 , DCS :32) , RLINKUP for Uplink (GSM : 40 , DCS : 36)
RLT : 52
BsRadioLKTmOut, MsRadioLKTmOut => GSM: 36; DCS: 32
36
Sacch_times Impacted to TCH Drop
Max Number of Retransmission Number of Multiframes Number of Slots Spread Trans
maxNumberRetransmission : 2 noOfMFramesBe tweenPaging : 2 nbrOfSlotsSprea dTrans : 32
2 2 32
times Number Number
timerPeriodicUpdateMs : 2 h
IMMASSMAXSENDNUM = 2 BSPAMFRAMS= 2 TX : 32 T3212 : 40 (Unit : decihour in Huawei)
MaxRetrans : 4 BsPaMfra ms : 5 TxInteger : 14
Periodic Ms Location Update(2G/3G)
MAXRET : 2 MFRMS : 2 TX : 32 T3212 : 40 (Unit : decihour in Ericsson)
T3212 : 360
4
Hours
Sacch repeat window
sacchRe peatWindow : 4
SACCH/T N200 : 5 times
N200SACCH : 5
(RepeatACCH = YES) -> SACCH repeat Hardcoded
4
times
T200S
T200S : 300 ms
Parameter T200 in Ericsson related to parameter SIGDEL , if SIGDEL= T200S:200 NORMAL (T200=240ms) then SIGDEL=LONG (T200=1400ms)
T200_0, T200_5 : 5
240
ms
Need confirm why ZTE value too small
T200F
T200F : 200 ms
Parameter T200 in Ericsson related to parameter SIGDEL , if SIGDEL= T200F:200 NORMAL (T200=240ms) then SIGDEL=LONG (T200=1400ms)
T200_1, T200_2 : 5
200
ms
Need confirm why ZTE value too small
Max Queue Length T3101
timeLimitCal l : 10 T3101 : 3
15-30 (unit in decisec onds)
TIQUEUINGTIMER =8 T3101=3
rmsT11 : 6 RmsT3101 : 3
7 3
s s
T8
T8 : 12
T8=10
RmsT8 : 1
As per vendor
s
Never been adjusted
T7 T3103 T3107
T7 : 20 T3103 : 6 T3107 : 6
T7=10 T3103=10 T3107=10
RmsT7 : 1.5 RmsT3103 : 6 RmsT3107 : 6
As per vendor As per vendor As per vendor
s s s
Never been adjusted Never been adjusted Never been adjusted
Time Limit Handover
timeLimitHandover : 5
HANDOVER_ REQUEST_timer (THNDREQ) => 8 second , HANDOVER_ REJECT_timer (THNDRQREJ) => 1 second
TQHO=8
RmsTqho : 5
6
s
Call Reestablishment Allowed
Not allowed
Not allowed
Not allowed
Not allowed
MSTXPWR GSM: 33 DCS: 30
MAXTA => Normal cell : 64 , XrangeCell : 255
T8 in Ater Signalling => 8 second , T8 in A-interface : 25 second T7 : 3 T3103 : 6 T3107 : 6
MSTXPWR GSM: 33 DCS: 30
MsTxPwrMax : 33
ACCMIN => GSM : 102 , DCS : 95
RxLevAcc essMin : -100
MAXTA => Normal cell : 64
TaMax : No Limit
-
-
Impacted to TCH Drop
No Limit 0
Not allowed
dB
ZTE only has BS Tx Power Min
If > 4 hours will be change to 4 hours, if below still remain
Impacted to TCH Drop
3G RAN Parameter Parameter
DCH to FACH Transition Time
FACH to PCH Transition time PCH to Idle state transition time
NSN InactivityTimerDownlinkDCH832: 5 InactivityTimerUplinkDCH8-32: 5 InactivityTimerDownlinkDCH64 -384: 2 InactivityTimerUplinkDCH8-32: 2 UL_DL_activation_timer: 2 ExtendedULDLactivationTmr: 0 MSActivitySupervision: 29
Current Value Ericsson
Huawei
ZTE
hsdschInactivityTimerCpc For CPC Capable : 5 , hsdschInactivityTimer Non_CPC Capable : 2
BeD2FStateTransTimer= TRbRecfgCmpDtoF : 15 5
5
s
-
BeF2PStateTransTimer= 2
2
s
InactivityTimerPCH : 30
PSInactTmr= 5
As per vendor
minut e
0
s
1000
Bytes
BEH2FTVMTIMETOTRIG =5
5
s
BEH2FTVMTHD=64
64
Bytes
TrafVolTimeToTriggerUL: 0 s TrafVolTimeToTriggerDL: 0 s TrafVolThresholdULLow: 7 (1 KB) TrafVolThresholdDLLow: 7 (1 KB) MACdflowthroughputTimetoTri gger: 5 MACdflowthroughputRelThr: 0 bps
BEF2DTVMTIMETOTRIG T312Connected : 1 =0 N312Connected : 1
T3212 (Peridic Location Update)
CS_T3212: 2
T3212=4
QqualMin QrxLevMin Max Bit Rate HSPA/MAC-D Flow
QqualMin : -18 QqualMin : -18 QrxLevMin : -115 QrxLevMin : -115 MaxBitRateNRTMACDFlow: No Limit
Max Bit Rate DL PS
MaxBitRateDLPSNRT: 384
-
Max Bit Rate UL PS
MaxBitRateULPSNRT: 384
-
T313 N313 T300 N300 UE Tx Power on PRACH T314
T313 : 3 N313 : 50 T300 : 2 N300 : 3 UEtxPowerMaxPRACH: 24 T314 : 6
T313 : 3 N313 : 100 T314 : 12
FACH to DCH Transition Time
Trigger FACH to DCH
HSDPA to FACH trigger time HSDPA to FACH trigger throughput
Recommend Unit Value
T3212 : 4
BEF2DTVMTHD=1024
QqualMin=-18 QrxLevMin=-115
T3212Cs : 4
QqualMin : -18 QrxLevMin : -115 HsMaxDlRateDch : No Limit R99MaxDlRateDch : 384 R99MaxUlRateDch : 384 T313=3 T313 : 3 N313=20 N313 : 50 T300=2 T3002 : 2 N300=3 N300 : 3 MaxUlTxPowerforint=24 MaxRACHTxPwr : 24 T314=6 T314 : 4
4 -18 -115
Remark
If > 4 hours will be Hours change to 4 hours, if below still remain dB dBm
No Limit 384
Kbps
384
Kbps
3 20 2 3 24 6
S Impacted to CCSR CS Times S Times dBm Impacted to CCSR CS s
Sampling: 2G RLT Setting Radio Link Time Out BalNus vs CJ
•
•
RLT setting in Balnus is too short if compare to setting in CJ that mostly RLT in maximum setting. Inline with the setting, drop call in BalNus is worst than CJ.
Sampling: 3G RLT Setting (T313&T314)
•
•
T314 setting in Balnus is around 4 to 5 seconds while setting in CJ in maximum setting (20 second) and only one RNC is 12 second. Inline with the setting, CCSR CS in BalNus is worst than CJ.
CCR Trend & Improvement
We need to standardize all service impact parameter setting in order to Have standard parameter that could impact user experience for all existing & new sites / NE Decrease Gap between KPI achievement and user experience
Core Parameter Parameter
Background Drop Call Issue i n RNC PARE Sumalpua due to Mismacthed Timer. No Standarization Value for
TIAS/TIAR
parameter TIAS & TIAR in Telkomsel.
Objective
KPI / PI Main Goal
for Inaccuracy Timer
SCR, CCR Standardized Value
TIAS = 60s and TIAR = Variant Value for parameter 660s for all Node TIAS & TIAR implemented in Telkomsel Long Call Setup due to l ong paging timer
Paging Timer
Second Paging are not activated in some LAC
No Standardization Value for
MSC TIME > BSC TIME +
Shorter Call Setup
Guard Time (for IDR) No Global Paging used
Time PSR
Second Page activated (AT =1 for NSN MSS)
T8 Timer
TIAS : 300s
TIAS : 60s
TIAS : 60s
TIAR : 660s
TIAR : 660s
TIAR : 660s
Maintain and Improve PSR
INT : 400ms - 700ms
1st Page : 8-10s
INT : 400ms
2nd Page : 10s
2nd Page : 8s
AT : 0 & 1
Global Page : 0 & 1
AT : 1
Global Page : 0
2H:10m - 8H:15m
4H:6m - 7H:15m
5H:15m
5H:15m
1 Day
1 & 3 Days
1 Day
1 Day
15s
15s & 41s
41s
41s
SCR, LUSR BTDM > T3212 + Guard Time
SCR, LUSR
Reducing Absent Subscribers
Maintain and Improve
"Misscommunication" Obselete Subcribers
1 Day Loitering Time at SCR, PSR all MSS
Database still record in VLR Intra MSC Handover Fail ure
MSC TIMER > T8
due to timer expiry Inappropriate timer setting
Maintain and Improve BSSMAP + T_ESTGUARD HOSR, CCR HOSR, CCR + T_REESTABLISH +
in both Core and Radio
T_REESTGUARD
SCR, PSR Reducing Absent Subscribers
Property11(7) Bad Voice Quality
HR codec (in Kbps) : 4.75, 5.90, 7.40
TrFO active at Core
Codec Parameter
MOS Inappropriate Codec setting
1st Page : 8s
Maintain and Improve
IMSI Detach Timer in both Core and Radio Call Failure due to HLR-VLR
Loitering Time
TIAS : 90s TIAR : 270s
for all Node
Call Failure due to "absent subscriber" Missmatch Timer Setting IMSI Detach Timer between Core and Radio
Suggested Value NSN EID
Maintain and Improve SCR, CCR
TIAR ≥ 2 x TIAS + Margin
Standardized Value :
Current Value NSN EID
HR codec (in Kbps) : 4.75, 5.90, 7.40
Better MOS FR codec (in Kbps) : 4.75, 5.90, 7.40, 12.2
in both Core and Radio FR codec (in Kbps) :
T FO A ti
Property12(7) Property13(7)
Property11(7) HR codec (in Kbps) : 4.75, 5.90, 7.40
Property12(7) Property13(7)
Property14(7)
Property14(7)
Property19(8) Property20(8&15)
Property19(8) Property20(8)
Property21(0&7) Property22(0&7) T FO A ti
FR codec (in Kbps) : 4.75, 5.90, 7.40, 12.2 T FO A ti
Property21(7) Property22(7) T FO A ti
TIAS/TIAR Standardization Key Programs: Standardized TIAS/TIAR Value for all network element in Telkomsel Network and meet the 3gpp parameter tuning Documentation where TIAR ≥ 2 x TIAS + Margin Time Key Indicator: Maintain and improve SCR CCR Uniform and Standardized Value for all Node • •
Descriptions: TIAS/TIAR are Sending and Receiving inactive SCCP connection status timer supervision that lead the SCCP to control whole connection processes. In 3gpp standard TIAS is a Periodic "Inactive Test", the message are sent to the remote SCCP when no after message have been sent on the connection for the timer duration. In other hand the connection is terminated by TIAR time if no message are received from remote SCCP node for the duration of the time. Benefit : Improve Network Performance & Network Productivity Easier way in Network Optimization for audit and standardization parameter Reduced Network Parameter Inconsistency & Discrepancy • • •
Jan-2014 TIAS/TIAR Standardization
Re-audit and Update Meeting
Feb-2014 Roll Out
Monitoring & Evaluation
Mar-2014 Monitoring
Apr-2015
Paging Timer Standardization Key Programs: Optimized Paging Timer Value for all network element in Telkomsel Network and meet Subscriber perceived satisfaction in making setup call. Key Indicator: Maintain and improve SCR CCR Maintain and improve Paging Success Rate • •
Descriptions: Paging Timer is the core supervision time when network trying to reach subscriber status in radio network whenever call set up phase establishment. Lower Paging time response mean faster call set up time. Paging time in core network should consider all the set up time taking place in radio part. Standard time paging timer formula : MSC TIME > BSC TIME + Guard Time (for IDR) Benefit : Improve Network Performance & Network Productivity Optimized Paging Time and call set up time Reduced Network load due to long call set up • • •
Jan-2014 Paging Timer Standardization
KPI monitoring and Audit Initiation
Feb-2014
Re-audit and Update Meeting
Mar-2014
FNI and Roll Out
Evaluation & Monitoring
Apr-2015
IMSI Detach Timer Standardization Key Programs: Optimized Core Network in recording subscribers status within Its database and ensuring the “subscriber absent” status is keep up to date whenever call set up is proceeding. Key Indicator: Maintain and Improve SCR, Maintain and Improve LUSR • •
Descriptions: Automatic deregistration of mobile subscribers offers the possibility to automatically deregister mobile subscribers that have had no radio contact during a certain period of time in the MSC/VLR. Standard formulation Core IMSI Detach Timer is: BTDM > T3212+ Guard Time Benefit : Improve Network Performance & Network Productivity Reducing “Absent Subscribers” Avoid Missmatch Timer Setting between Core and Radio • • •
Jan-2014 IMSI Timer Standardization
KPI monitoring and Audit Initiation
Feb-2014
Re-audit and Update Meeting
Mar-2014
FNI and Roll Out
Evaluation & Monitoring
Apr-2015
Loitering Timer Standardization Key Programs: Optimized Core Network in recording subscribers status within Its database and ensuring the “subscriber absent” status is keep up to date whenever call set up is proceeding. Key Indicator: Maintain and Improve SCR, Maintain and Improve LUSR • •
Descriptions: Loitering time is the periodic cleaning time to deregister Subscribers from VLR when subscriber already in detach state.
Benefit : Improve Network Performance & Network Productivity Reducing “Absent Subscribers” Avoiding obselete Subscribers Database record in VLR • •
•
Jan-2014 Loitering Timer Standardization
KPI monitoring and Audit Initiation
Feb-2014
Re-audit and Update Meeting
Mar-2014
FNI and Roll Out
Evaluation & Monitoring
Apr-2015
T8 Timer Standardization Key Programs: Optimized Core Network in handling the Handover process Within its radio coverage and enhance core Network retainability in handling conversation call. Key Indicator: Maintain and Improve HOSR, Maintain and Improve CCR • •
Descriptions: the supervision timer value for the intra MSC handover completion in the anchor or nonanchor MSC. The time supervision period is started with the sending of a handover command to the source BSC and is stopped with the reception of a handover complete from the target BSC. MSC TIMER > T8 BSSMAP + T_ESTGUARD + T_REESTABLISH + T_REESTGUARD Benefit : Improve Network Performance & Network Productivity Reduce Intra MSC Handover Failure due to timer expiry Avoid Inappropriate timer setting in both Core and Radio • •
•
Jan-2014 T8 Timer Standardization
KPI monitoring and Audit Initiation
Feb-2014
Re-audit and Update Meeting
Mar-2014
FNI and Roll Out
Evaluation & Monitoring
Apr-2015
Codec Parameter Standardization Key Programs: Optimized Core Network in handling the Speech Quality Key Indicator: •
Better MOS
Descriptions: The Core/Radio parameter that provide the preference codec to be used whenever a call in progress. The good codec parameter setting will lead to good speech quality and end user perceived. The speech quality is measured in Mean Opinion Score (MOS)
Benefit : Improve Network Performance & Network Productivity Reduce Bad Voice Quality Avoid Inappropriate Codec setting in both Core and Radio • •
•
Jan-2014 Codec Parameter Standardization
KPI monitoring and Audit Initiation
Feb-2014
Re-audit and Update Meeting
Mar-2014
FNI and Roll Out
Evaluation & Monitoring
Apr-2015
Parameter Audit & Standardization
KPI and PI in node level Scanning based on Threshold (SCR<90%,CCR<95%,PDP SR<97%,PDP CR<96%) •
Achievement Evaluation Recommendation for Next Roll out
• •
KPI Scanning
Parameter Audit
Evaluation Improvement
Parameter Standardization Define Parameter related to KPI and PI Audit All involved Node (Core – Radio – Transport) •
•
Action Plan •
• •
Define Action plan based on analysis & assessment Job Matrix responsibilities Fallback Scenarios
Analysis & Assessment • • •
Define “The Pros” and “The Cons”
Vendor Consultation Changes Possibilities (Basic or additional Feature)
Parameter Change Flow Chart in Core
Parameter Change Flow Chart in RAN
21
