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5/23/2018 GSM Wireless PS Performance Analysis Guide V1.0(20120615)
GSM Wiress PS PerformanceAnalysis Guide
Issue V1.0
Date 2011-12-31
HUAWE !E"H#$%$GES "$.& %!'.
5/23/2018 GSM Wireless PS Performance Analysis Guide V1.0(20120615)
"o(yri)*+ , Huaei !ec*nolo)ies "o.& %+d. 2012. All ri)*+s resered.
No part of this document may be reproduced or transmitted in any form or by any means without prior
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statements, information, and recommendations in this document are provided !A" #"! without warranties,
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recommendations in this document do not constitute a warranty of any kind, e$press or implied.
Huawei Technologies Co., Ltd.
Address' Huawei #ndustrial (ase
(antian, Longgang
"hen)hen *++-
/eople0s 1epublic of China
2ebsite' http'33www.huawei.com
&mail' support4huawei.com
Customer
service
telephone No.
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&' iress P' Perfor*an#e +nalysis &uide Cange History
Change History
Date Issue Description Author
2011-12-31 V1.0 Co*pleted te draft. 'en Huafang$ ,ie ing
2012-01-20 V1.1 odified a##ording to
reiew #o**ents.
'en Huafang
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Contents
Change History..................................................................................................................................ii
Change History..................................................................................................................................ii
1 Overview..........................................................................................................................................1
1.1 Introdu#tion.............................................................................................................................................................1
1.2 '#ope.......................................................................................................................................................................1
1.3 Data 'our#es............................................................................................................................................................1
2 Analysis System...............................................................................................................................1
2.1 /PI Perfor*an#e........................................................................................................................................ ......... ....1
2.1.1 +##essiility.......................................................................................................................................................2
2.1.2 etainaility.......................................................................................................................................................2
2.1.3 "rans*ission Perfor*an#e................................................................................................................................2
2.2 ser 4perien#e.......................................................................................................................................................3
2.2.1 %%C "rougput................................................................................................................................................5
2.2.2 Delay..................................................................................................................................................................5
2.2.3 Cell esele#tion.................................................................................................................................................5
2.3 "raffi# odel.......................................................................................................................................................... .5
2.3.1 6'C "rougput................................................................................................................................................5
2.3.2 PDCH "rougput.............................................................................................................................................7
2.3.3 PDCH 6earing ffi#ien#y............................................................................................................................ .....7
2.3.5 8u*er of "69 stalis*ents Per ser During Pea: Hours..........................................................................7
2.3.7 +erage "rougput Per ser During Pea: Hours............................................................................................7
3 KI Analysis an! Optimi"ation.....................................................................................................#
3.1 /PI '#oring................................................................................................................................................... ..........;
3.2 /PI +nalysis and
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5.1.5 Cannel 'atisfa#tion Degree +nalysis.............................................................................................................23
5.2 Delay +nalysis.......................................................................................................................................................23
5.3 Cell esele#tion.....................................................................................................................................................25
) *etwor+ Characteristics &valuation...........................................................................................2,7.1 ' 'upport Capaility aluation........................................................................................................................2>
7.1.1 ' 9re@uen#y 6and 'upport Capaility.........................................................................................................2>
7.1.2 ' ulti-ode 'upport Capaility................................................................................................................2;
7.1.3 ' n#ryption +lgorit* 'upport Capaility.............................................................................................. ..2;
7.1.5 ' P' 'eri#e Capaility.................................................................................................................. .......... ...2;
7.2 P' Cara#teristi#s +nalysis............................................................................................................................ .......2A
7.2.1 +erage "69 Duration +nalysis......................................................................................................................2A
7.2.2 odel apping 6etween 8u*er of "69 stalis*ents and "raffi#..........................................................2A
7.2.3 Duty Cy#le of Downlin: "69 elease Delay.......................................................................................... .......2?
7.2.5 +nalysis on Proportions of Du**y 6lo#:s and 'ignaling 6lo#:s.............................................................. ...30
7.3 ireless esour#e +nalysis...................................................................................................................................30
7.3.1 CCCH esour#e +nalysis................................................................................................................................30
7.3.2 ireless esour#e +nalysis.............................................................................................................................30
, Appen!i'........................................................................................................................................31
>.1 elated "ools............................................................................................................................................... ..........31
>.2 eferen#e Do#u*ents............................................................................................................................................31
>.3 6'C Para*eters.................................................................................................................................................. ...32
>.3.1 P' 6asi# Para*eters............................................................................................................................... .........32
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1 Overview1.1 Intro!uction
"is do#u*ent des#ries te wireless networ: P' perfor*an#e analysis syste* as well as its
analysis and opti*i=ation *etods$ and proides te in-dept analysis of fa#tors affe#ting
networ: perfor*an#e. It proides guidelines for P' perfor*an#e analysis$ elping @ui#:ly anda##urately isolate and lo#ate prole*s and perfor* opti*i=ation to i*proe deliery
effi#ien#y.
"e wireless networ: P' perfor*an#e analysis syste* #onsists of /PI perfor*an#e (in#luding
a##essiility$ retainaility$ and trans*ission perfor*an#e)$ user e4perien#e (in#luding logi#al
lin: #ontrol (%%C) trougput$ delay$ and #ell resele#tion)$ traffi# *odel$ and networ:
#ara#teristi#s.
6'C /PIs are used as data sour#es analy=ed in tis do#u*ent. "e &'B8etwor:+udit tool
of te
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Data Source /emar+s How to Otain Data Collection /ange
using te
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2 Analysis System2.1 KI er0ormance
8etwor: /PI perfor*an#e in#ludes a##essiility$ retainaility$ and trans*ission perfor*an#e.
It is used to refle#t te i*pa#t of trans*ission @uality on te * and &-+is interfa#es and
resour#es usage on networ: @uality in different pases of P' seri#es.
-ale 1.18etwor: /PIs
Category KI /ecommen!e! alue
+##essiility
plin: &P' "69 stalis*ent 'u## ate E ?7F
Downlin: &P' "69 stalis*ent 'u## ate E ?7F
plin: &P' "69 stalis*ent 'u## ate E ?7F
Downlin: &P' "69 stalis*ent 'u## ate E ?7F
plin: "69 Congestion ate G 3F
Downlin: "69 Congestion ate G 3F
plin: &P' "69 Congestion ate G 3F
Downlin: &P' "69 Congestion ate G 3F
etainaility
plin: &P' "69 Call Drop ate G 7F
Downlin: &P' "69 Call Drop ate G 7F
% &P' "69 drop rate (F) G 7F
D% &P' "69 drop rate (F) G 7F
"rans*issionperfor*an#e
etrans*ission rate of % %C data lo#: (F) G 7F
etrans*ission rate of D% %C data lo#: (F) G 7F
etrans*ission rate of % &P' %C datalo#: (F)
G 7F
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Category KI /ecommen!e! alue
etrans*ission rate of D% &P' %C data
lo#: (F)
G 10F
ate of "rans*itted rror 9ra*es G 0.70F
2.1.1 Accessiility
"e a##essiility *easures te networ: a##ess su##ess rate of 's and refle#ts te i*pa#t of
trans*ission @uality on te * and &-+is interfa#es and resour#e usage on networ: a##essof 's. If te alues of a##essiility /PIs are not witin te nor*al range$ te networ: a##ess
su##ess rate and networ: a##ess delay of 's as well as #ore networ: /PIs (su# as te
atta# su##ess rate$ PDP a#tiation su##ess rate$ and + su##ess rate) *ay deteriorate. +s aresult$ 's fail to a##ess te networ:.
+##essiility /PIs are defined fro* te aspe#ts of "69 estalis*ent su##ess rate and "69
#ongestion rate. "e for*ulas for #al#ulating te "69 estalis*ent su##ess rate and "69#ongestion rate are as follows
"69 estalis*ent su##ess rate 8u*er of su##essful "69 estalis*entsJ8u*er of "69estalis*ent atte*pts
"69 #ongestion rate 8u*er of "69 estalis*ent failures due to no #annelaailaleJ8u*er of "69 estalis*ent atte*pts
"e "69 #ongestion rate indi#ates weter PDCHs are suffi#ient.
"e for*ulas for #al#ulating te uplin:Jdownlin: &P'J&P' "69 estalis*ent su##ess rate anduplin:Jdownlin: &P'J&P' "69 #ongestion rate are si*ilar to te pre#eding for*ulas.
2.1.2 /etainaility
etainaility *easures #all drops on PDCHs and refle#ts te i*pa#t of trans*ission @ualityon te * and &-+is interfa#es and resour#e usage on seri#es of 's. If te alues of
retainaility /PIs are not witin te nor*al range$ te data trans*ission rate and delay of
's as well as #ore networ: /PIs (su# as atta# su##ess rate$ PDP a#tiation su##ess rate$and + su##ess rate) *ay deteriorate. +s a result$ 's fail to a##ess te networ:.
"e for*ula for #al#ulating te "69 anor*al release rate is as follows
"69 anor*al release rate 1 K 8u*er of "69 nor*al releasesJ8u*er of su##essful "69estalis*ents
"e for*ulas for #al#ulating te uplin:Jdownlin: &P'J&P' "69 anor*al release rate are si*ilar to te
pre#eding for*ulas.
2.1.3 -ransmission er0ormance
"rans*ission perfor*an#e *easures networ: trans*ission @uality and refle#ts te i*pa#t of
trans*ission @uality on te * and &-+is interfa#es and resour#e usage on seri#es of 's.
If te alues of /PIs related to trans*ission perfor*an#e are not witin te nor*al range$ te
networ: a##ess su##ess rate and data trans*ission rate *ay deteriorate and te delay *ay
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prolong.
"rans*ission perfor*an#e /PIs are defined fro* te aspe#ts of %C data lo#:
retrans*ission rate and trans*ission fra*e error rate (9).
"e for*ulas for #al#ulating te %C data lo#: retrans*ission rate are as followsetrans*ission rate of % %C data lo#: 1 K (8u*er of Valid plin: %C Data 6lo#:s
sing C'1 L 8u*er of Valid plin: %C Data 6lo#:s sing C'2 L 8u*er of Valid
plin: %C Data 6lo#:s sing C'3 L 8u*er of Valid plin: %C Data 6lo#:s singC'5)J"otal 8u*er of plin: &P' %C Data 6lo#:s
etrans*ission rate of % &P' %C data lo#: 1 K ("otal 8u*er of Valid plin:
&P' C'1 %C Data 6lo#:s L M L "otal 8u*er of Valid plin: &P' C'? %CData 6lo#:s)J"otal 8u*er of plin: &P' %C Data 6lo#:s
"e for*ula for #al#ulating te retrans*ission rate of downlin: &P' %C data lo#:s issi*ilar to te for*ula for #al#ulating te retrans*ission rate of uplin: &P' %C data
lo#:s. "e for*ula for #al#ulating te retrans*ission rate of downlin: &P' %C data
lo#:s is si*ilar to te for*ula for #al#ulating te retrans*ission rate of uplin: &P' %Cdata lo#:s.
"e for*ula for #al#ulating te 9 is as follows
"rans*ission fra*e error rate (8u*er of e#eied
plin: "rougput of &P' sers %%C PD E 57
Downlin: "rougput of &P' sers %%C PD E 120
Delay +erage delay in seri#e intera#tion response (s) G 0.32
Cell
resele#tion
% &P' "69 drop rate due to 9lus G 1F
D% &P' "69 drop rate due to 9lus G 1F
% &P' "69 drop rate due to 9lus G 1F
D% &P' "69 drop rate due to 9lus G 1F
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2.2.1 C -hroughput
%%C trougput refle#ts te a#tual trougput e4perien#ed y users on te 6'' side. It also
refle#ts te i*pa#t of trans*ission @uality on te * and &-+is interfa#es and resour#e
usage on te user trougput. If te %%C trougput is low$ user e4perien#e deteriorates.eanwile$ seri#e-related #ounters$ su# as *ulti*edia *essage sendJre#eie su##ess rate$
we page openJrefres su##ess rate$ and we page display period$ *ay e adersely affe#ted.
%%C trougput is affe#ted y PDCH single-ti*eslot rate$ "69 *ultiple4ing degree$ and
#annel satisfa#tion degree.
2.2.2 Delay
Delay *easures te interal etween a seri#e re@uest and a seri#e response and refle#ts tei*pa#t of trans*ission @uality on te * and &-+is interfa#es$ resour#e usage$ and #ore
networ: prole*s on user e4perien#e. If te delay is too long$ user e4perien#e deteriorates.eanwile$ #ore networ: /PIs and /PIs related to seri#e su##ess rate$ su# as atta#
su##ess rate$ PDP a#tiation su##ess rate$ + su##ess rate$ *ulti*edia *essage sendJre#eiesu##ess rate$ we page openJrefres su##ess rate$ and we page display period$ *ay e
adersely affe#ted.
9ro* te 6'' side$ delay *ay e generated y te downlin: 6''$ uplin: 6''$ or #ore
networ:.
Delay generated y te downlin: or uplin: 6'' is #aused y te poor trans*ission @uality on
te * and &-+is interfa#es and resour#e insuffi#ien#y. Delay generated y te #ore
networ: is #aused y resour#e insuffi#ien#y on te #ore networ: or networ: prole*s.
2.2.3 Cell /eselectionCell resele#tion *easures te fre@uen#y of #ell resele#tion during seri#e pro#essing. 'eri#es
are te*porarily interrupted wen #ell resele#tion o##urs. "is deteriorates user e4perien#e.
2.3 -ra00ic o!el
2.3.1 4SC -hroughput
6'C trougput refle#ts te total 6'C trougput. Download seri#es a##ount for a large
proportion of P' seri#es$ and terefore you need to fo#us on te /PIs "rougput ofDownlin: &P' %C Data 6lo#:s per 6'C(yte) and "rougput of Downlin: &P'%C Data 6lo#:s per 6'C(yte).
"e two /PIs are displayed in &P' 8etwor:
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-ale 1.1 elated /PIs
-hroughput o0
%plin+ 5/S /C
Data 4loc+s per
4SC6yte7
-hroughput o0
Downlin+ 5/S
/C Data 4loc+s
per 4SC6yte7
-hroughput o0
%plin+ &5/S
/C Data 4loc+s
per 4SC6yte7
-hroughput o0
Downlin+ &5/S
/C Data 4loc+s
per 4SC6yte7
2.3.2 DCH -hroughput
PDCH trougput refle#ts te trougput #arried on ea# PDCH. "e for*ula for #al#ulatingte PDCH trougput is as follows
PDCH trougput (Downlin: &P' %%C trougput per 6'C L Downlin: &P' %%Ctrougput per 6'CJ+erage nu*er of o##upied PDCHs
2.3.3 DCH 4earing &00iciencyPDCH earing effi#ien#y refle#ts PDCH usage. "e PDCH earing effi#ien#y de#reases wit
a de#rease in te PDCH usage. If traffi# in a #ell is #ongested due to insuffi#ient resour#es$you #an #o*press te nu*er of PDCHs to aoid traffi# #ongestion witout affe#ting te user
trougput. "e for*ula for #al#ulating te PDCH earing effi#ien#y is as follows
PDCH earing effi#ien#y PDCH trougputJ3>00
2.3.$ *umer o0 -48 &stalishments er %ser During ea+ Hours
"e /PIs 8u*er of plin: "69 stalis*ent Per ser on 6usy"i*e and 8u*er of
Downlin: "69 stalis*ent Per ser on 6usy"i*e refle#t ow often a "69 estalises
during pea: ours. "ese /PIs elp you learn aout seri#e pro#essing during pea: ours.
"e /PIs are displayed in te ser odel tale in te %ser o!elwor:seet of te
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"e /PIs are displayed in te ser odel tale in te %ser o!elwor:seet of te
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3 KI Analysis an! Optimi"ation3.1 KI Scoring
/PI s#oring elps you deter*ine te status of networ: /PIs and identify te :ey /PIs
affe#ting s#oring.
6'C-leel /PIs and /PI s#oring are displayed in te *etwor+ er0ormance Au!it
wor:seet of te
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8ote
6aseline alue "e aseline alue for "69 stalis*ent 'u## ate is ?7F.
+#tual alue "e a#tual alue is otained a##ording to te statisti#al alue of te lie
networ:. "e alue of ate of 9ailed "69 stalis*ents due to ' 8o esponse on te lienetwor: is e4#essiely iger tan tat of ate of 9ailed "69 stalis*ents due to
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-ale 1.3 uantified analysis on a##essiility /PIs of top 8 #ells
4SC *ame -op Contriutio
n Degree o0
-O Cells
4SC -48
&stalishmen
t Succ /ate
a0terOptimi"e
4SC -48
&stalishmen
t Succ /ate
a0terOptimi"e
DCH
resource
4SC -48
&stalishmen
t Succ /ate
a0terOptimi"e S
*o /sponse
4SC -48
&stalishment
Succ /ate
a0terOptimi"e
Other reason
'H6'C>
Perfor*an#e after
opti*i=ing
top 7 #ells
25.7;F ?A.?AF ?A.AAF ?A.?1F ?A.?7F
'H6'C
>
Perfor*an#
e after
opti*i=ingtop 10 #ells
5;.A5F ?A.??F ?A.AAF ?A.?2F ?A.?7F
'H6'C
>
Perfor*an#
e afteropti*i=ing
top 20 #ells
0.00F ?A.AAF ?A.AAF ?A.AAF ?A.AAF
"e following figure sows an e4a*ple of data analysis on 6'C220 in &er*any .?3F.
If te per#entage of failed "69 estalis*ents due to no resour#es for #ell 73 is 2F$ te "69
estalis*ent su##ess rate for te #ell in#reases to ;;.0;F and te alue of te 6'C-leel /PIin#reases to ?1.A>F. 9urter opti*i=e te "69 estalis*ent su##ess rate due to no '
response. en te /PI alue *eets 3F of te aseline alue$ te #ell /PI in#reases to
?5.;>F$ and te 6'C /PI in#reases to ?7.11F.
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Accessiility KI er0ormance Analysis
"e failure #auses of a##essiility /PIs related to "69 estalis*ent failure rate #an e
analy=ed ased on te data in te following wor:seets
4SC %plin+ &5/S -48 &stalishment Succ /ate Analysis 4SC %plin+ 5/S -48 &stalishment Succ /ate Analysis
4SC Downlin+ &5/S -48 &stalishment Succ /ate Analysis
4SC Downlin+ 5/S -48 &stalishment Succ /ate Analysis
+s sown in "ale 1.5and "ale 1.7(using uplin: &P' /PIs as an e4a*ple)$ tea##essiility /PIs related to "69 estalis*ent failure rate are as follows
ate of 9ailed plin: &P' "69 stalis*ents due to 8o Cannel (*ain #auseresour#e #ongestion)
ate of 9ailed plin: &P' "69 stalis*ents due to ' 8o esponse (*ain #ause
poor trans*ission @uality on te * interfa#e$ anor*al trans*ission on te &-+is
interfa#e$ and CCCH #ongestion)
ate of 9ailed plin: &P' "69 stalis*ents due to
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In nor*al #ases$ te &P' PDCH #ongestion rate is al*ost te sa*e as te &P'PDCH #ongestion rate. If te &P' PDCH #ongestion rate is ig ut te &P'
PDCH #ongestion rate is low$ #e#: weter &P' PDCHs are insuffi#ient e#ause
&P' dedi#ated PDCHs or &P' preferred PDCHs are #onfigured. en tiso##urs$ #ange &P' dedi#ated PDCHs or &P' preferred PDCHs to #o**on
&P' PDCHs and set Allow & Down 5 %p Switchto :es.
If traffi# in te underlaid su#ell of a #on#entri# #ell is #ongested$ set Dynamic ChannelConversion arameter o0 Concentric Cellto Only convert !ynamic channel at O.
.3.1P' 6asi# Para*eters.
627 -48 &stalishment 8ailures Due to *o S /esponse
Due to poor trans*ission @uality of te * interfa#e$ anor*al &-+is trans*ission orCCCH #ongestion$ "69 estalis*ent fails wen te ' fails to re#eie or parse downlin:
*essages or te 6'C fails to parse te uplin: response *essages fro* te ' #orre#tly.
"ese "69 estalis*ent failures are #ounted as "69 estalis*ent failures due to no 'response.
Poor trans*ission @uality of te * interfa#e
ea: #oerage$ interferen#e$ and i*alan#e etween te uplin: and te downlin: resultin poor trans*ission @uality of te * interfa#e. 9or details aout ow to analy=e and
opti*i=e te trans*ission @uality of te * interfa#e$ see te Guide to GSM Network
Evaluation of Coverage and Interference.
+nor*al &-+is trans*ission
If it errors or #annel out-of-syn#roni=ation o##urs$ uplin: and downlin: data fails to
e de#oded #orre#tly. +s a result$ "69 estalis*ent fails. In addition$ te lin: delayprolongs wen te &-+is trans*ission is anor*al. en tis o##urs$ te ti*er at te
re#eiing end *ay e4pire. +s a result$ "69 estalis*ent fails.
9or details aout ow to analy=e te &-+is trans*ission$ see &-+is "rans*ission.
CCCH #ongestion
Rou #an deter*ine weter an assign*ent *essage is deliered nor*ally ased on te
pa#:et i**ediate assign*ent su##ess rate and te 'u##ess ate of P+CCH assign*ent
su##ess rate. "ale 1.>and"ale 1.; list te /PIs related to 6'C-leel and #ell-leeluplin: assign*ent su##ess rates.
-ale 1., 6'C uplin: assign*ent su##ess rate analysis
4SC *ame Success0ul %
Assignment /ate 6;7
Success /ate o0 %
S Imme!iate
Assignment
Success /ate o0 %
Assignment on
ACCH
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5/23/2018 GSM Wireless PS Performance Analysis Guide V1.0(20120615)
&' iress P' Perfor*an#e +nalysis &uide 2 +nalysis 'yste*
-ale 1.# plin: assign*ent su##ess rate analysis
4SC
*ame
Cell
*ame
Success0ul
%
Assignment
/ate 6;7
*umer o0
%
Assignments
Success
/ate o0 %
S
Imme!iateAssignment
*umer o0
% S
Imme!iate
Assignments
Success
/ate o0 %
Assignment
on ACCH
Success0ul
%
Assignments
on ACCH
If te pa#:et i**ediate assign*ent su##ess rate is low$ ut te pa#:et i**ediateassign*ent su##ess rate on te P+CCH is ig$ #e#: weter CCCH oerload o##urs. If
CCCH oerload o##urs$ te I**ediate +ssign*ent *essages sent oer te CCCH are
dis#arded. +s a result$ "69 estalis*ents fail. Rou #an #e#: weter CCCH oerloado##urs ased on te Cell CS Service aging Deletion Chec+and aging Deletions
/ate 0or S Services Analysiswor:seets.
If CCCH oerload o##urs$ set te CCCH load tresold to a large alue to aoid "69
estalis*ent failures due to flow #ontrol. "e *ost effe#tie *etod is to in#rease te
nu*er of e4tended 6CCHs.
In addition$ in#rease te alue of ti*er "31>A during two-pase a##ess. "is preents's fro* fre@uently sending #annel re@uests$ and alleiate CCCH oerload.
"o redu#e "69 estalis*ent failures due to no #annel aailale and no ' response$i*proe te trans*ission @uality of te * and &-+is interfa#es. +lternatiely$ opti*i=e te
settings of te following para*eters
In#rease te alue of "31>A for a satellite #ell or a #ell were trans*ission prole*s are
serious and diffi#ult to resole$ su# as a #ell were te trans*ission delay oer te &-+is interfa#e is long and unstale.
In#rease te alues of -31(2$ /elease Delay o0 Downlin+ -486ms7$ /elease Delay o0
*on
5/23/2018 GSM Wireless PS Performance Analysis Guide V1.0(20120615)
&' iress P' Perfor*an#e +nalysis &uide 2 +nalysis 'yste*
Analysis on A00ecting ercentage o0 /etainaility KIs
-ale 1.1 +nalysis on 6'C-leel retainaility /PIs
KI 4aselinealue Actualalue Deviation A00ectingercentage
etainaility/PIs
"69 Call Drop ate 7F
ate of "69 Drop
Due to ' 8o
esponse
2.7F
ate of "69 Drop
Due to 9%'H0.;F
ate of "69 Drop
Due to ''P8D0.7F
J
ate of "69 DropDue to 8o esour#e
0.7F
ate of "69 Drop
Due to
5/23/2018 GSM Wireless PS Performance Analysis Guide V1.0(20120615)
&' iress P' Perfor*an#e +nalysis &uide 2 +nalysis 'yste*
-ale 1.2 "op 8 #ells wit poor retainaility
/ate o0 Cell
-48
&stalishme
nt Successtimes to 4SC
/ate
o0
Cell
-48Drop
-ime
s to
4SC
/ate o0
Cell -48
Drop
-imes6*o
/esource
7 to 4SC
/ate o0
Cell -48
Drop
-imes6S *o
/esponse
7 to 4SC
/ate o0 Cell
-48 Drop
-imes68%S
H7 to 4SC
Cell
-48
Call
Drop/ate
a0ter
Optimi"
e
Cell
-48
Call
Drop/ate
a0ter
Optimi"
e DCH
/esourc
e
Cell
-48
Call
Drop/ate
a0ter
Optimi"
e S *o
/sponse
Cell -48
Call
Drop
/atea0ter
Optimi"
e
8%SH
9uanti0ie! Analysis on Improvements in /etainaility KIs
uantified analysis on i*proe*ents in retainaility /PIs @uantifies ow *u#
i*proe*ents 6'C /PIs #an *a:e wen /PIs of top 8 #ells rea# teir aseline alues. "e"69 #all drops due to arious reasons #an e #al#ulated ased on teir aseline alues.
-ale 1.3 uantified analysis on i*proe*ents in retainaility /PIs
4SC *ame -op Contriution
Degree o0 -O
Cells
4SC -48
Call Drop
/ate a0ter
Optimi"e
4SC -48
Call Drop
/ate a0ter
Optimi"eDCH
/esource
4SC -48
Call Drop
/ate a0ter
Optimi"eS *o
/sponse
4SC -48
Call Drop
/ate a0ter
Optimi"e8%SH
'H6'C> Perfor*an#e
after opti*i=ingtop 7 #ells
1>.1?F 1.2>F 1.2AF 1.2AF 1.2?F
'H6'C> Perfor*an#e
after opti*i=ingtop 10 #ells
27.23F 1.2>F 1.2AF 1.2;F 1.2?F
'H6'C> Perfor*an#e
after opti*i=ingtop 20 #ells
3>.25F 1.2>F 1.2AF 1.2;F 1.2?F
/etainaility KI Analysis an! Optimi"ation
9or te #ells wit unsatisfied #all drop rate$ analy=e te #ause of #all drops ased on te
analysis ite*s in te &5/S=-48=CA=D/O=/A-&and
5/S=-48=CA=D/O=/A-&wor:seets."ale 1.5 and "ale 1.7list te /PIs related
to 6'C-leel and #ell-leel "69 anor*al releases. 9ollowing uses uplin: &P' "69
anor*al release as an e4a*ple.
5/23/2018 GSM Wireless PS Performance Analysis Guide V1.0(20120615)
&' iress P' Perfor*an#e +nalysis &uide 2 +nalysis 'yste*
-ale 1.$ +nalysis on uplin: &P' "69 anor*al releases
4SC *ame %plin+
&5/S -48
Anormal
/elease *oChannel
/esource
%plin+ &5/S
-48 Anormal
/elease
Suspen!
%plin+
&5/S -48
Anormal
/elease 8lush
%plin+
&5/S -48
Anormal
/elease S *o/esponse
-ale 1.) "op 8 #ells wit ig uplin: &P' "69 anor*al release rate
4SC
*ame
Cell
*ame
%plin+
&5/S
-48Anormal
/elease *o
Channel
/esource
%plin+
&5/S
-48Anormal
/elease
Suspen!
%plin+
&5/S
-48Anormal
/elease
8lush
%plin+
&5/S
-48Anormal
/elease S
*o
/esponse
%plin+
&5/S
-48 CallDrop
D
&5/S
-48 !roprate 6;7
617 -48 Anormal /eleases Due to *o S /esponse
*31>1$ *31>3$ and *31>)are #ounters for te 6'C to *easure uplin: and downlin: "69
@uality. If anor*al "69 releases o##ur e#ause tese #ounters oerflow$ te uplin: anddownlin: "69 @uality is anor*al. +nor*al releases due to no ' response refer to uplin:
#all drops due to 83101 and 83103 oerflow and downlin: #all drops due to 83107 oerflow.
In nor*al #ases$ *ore tan A0F #all drops are due to 83101$ 83103$ and 83107 oerflow.
*31>1$ *31>3$ or *31>)oerflows *ainly e#ause of poor trans*ission @uality on te *
interfa#e$ or unstale trans*ission @uality on te &-+is interfa#e. In addition$ #all drops dueto 83101$ 83103$ and 83107 oerflow *ay o##ur wen te settings of P' #oding para*eters
are inappropriate$ or an inappropriate algorit* is sele#ted for adNusting te #oding s#e*e.
"o redu#e "69 anor*al releases due to no ' response$ i*proe te trans*ission @uality onte * and &-+is interfa#es. +lternatiely$ opti*i=e te settings of te following
para*eters
In#rease te alues of *31>1$ *31>3$ and *31>)to i*proe te lin: @uality toleran#e ofte networ:.
se a low-rate #oding s#e*e to redu#e #all drops. 9or details$ see te *etods for
sele#ting a low-rate #oding s#e*e.
'ele#t te 6"' reporting 6 algorit* for adNusting te uplin: #oding s#e*e. Call
drops #an e redu#ed y using te algorit*.
627 -48 Anormal /eleases Due to Suspen!e! Data Services
Data seri#es are suspended wen 's perfor* lo#ation updates or C' seri#es during P'
seri#es. In tis situation$ "69 anor*al releases due to suspended data seri#es are
*easured. "is type of anor*al release refle#ts te i*pa#t of C' seri#es on P' seri#es.
If anor*al releases of tis type o##ur$ te lo#ation area settings for #ells were te #all drop
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5/23/2018 GSM Wireless PS Performance Analysis Guide V1.0(20120615)
&' iress P' Perfor*an#e +nalysis &uide 2 +nalysis 'yste*
rate is ig and te setting of te ti*er for periodi# lo#ation updates *ay e inappropriate.Rou are adised to #e#: tese settings.
637 -48 Anormal /eleases Due to the 8%SH= essages
en te sering &P' support node ('&'8) dete#ts #ell resele#tion initiated y an 'during data seri#es$ it sends a 9%'HB%% *essage to te original #ell. +fter te sour#e #ellre#eies te 9%'HB%% *essage$ one "69 anor*al release due to te 9%'HB%%
*essages is #ounted."is type of "69 anor*al release refle#ts te fre@uen#y of #ell
resele#tion initiated y 's. If a flood of anor*al releases of tis type o##ur$ #e#: te
settings of #oerage para*eters and resele#tion para*eters of a sering #ell and itsneigoring #ells to aoid ping-pong resele#tion. 9or details aout te opti*i=ation *etod$
see se#tion 5.3Cell esele#tion.
6$7 -48 Anormal /eleases Due to *o Channel
"e #auses of "69 anor*al releases due to no #annel aailale are as follows
nstale #annel status
9re@uent #annel out-of-syn#roni=ation
Cannel faults
anual #annel lo#:ing
Cannel dea#tiation
PDCH pree*ption y C' seri#es
If anor*al releases of tis type o##ur$ you are adised to #e#: te status of te trans*issiondei#es$ trans*ission lin:s$ and trans*ission #lo#:.
If te nu*er of ti*es te 6'C re#lai*s dyna*i# PDCHs is e@ual to te nu*er of ti*es te6'C re#lai*s dyna*i# PDCHs in load state$ ongoing C' seri#es pree*pt #annels o##upied
y P' seri#es. In tis situation$ you need to add stati# PDCHs. In addition$ set evel o0reempting Dynamic Channelto &&16*o preempt o0 CCHs7.
3.2.3 -ransmission er0ormance
"rans*ission perfor*an#e /PIs *easure trans*ission @uality of te networ:. "ey affe#t
a##essiility and retainaility /PIs as well as user e4perien#e. "ale 1.1 lists te trans*ission
perfor*an#e /PIs displayed in te *etwor+ er0ormance Au!itwor:seet. sually$ te
downlin: &P' %C data lo#: retrans*ission rate is lower tan 10F$ oter retrans*issionrates are lower tan 7F$ and te trans*ission fra*e error rate is lower tan 0.7F. "e a#tual
rates depend on te re@uire*ents of tele#o* operators.
-ale 1.1 6'C-leel trans*ission perfor*an#e /PIs
KI /ecommen!e!alue
"rans*issionperfor*an#e
etrans*ission rate of % %C data lo#: (F) G 7F
etrans*ission rate of D% %C data lo#: (F) G 7F
etrans*ission rate of % &P' %C data
lo#: (F)
G 7F
etrans*ission rate of D% &P' %C data
lo#: (F)
G 10F
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5/23/2018 GSM Wireless PS Performance Analysis Guide V1.0(20120615)
&' iress P' Perfor*an#e +nalysis &uide 2 +nalysis 'yste*
ate of "rans*itted rror 9ra*es G 0.70F
Cell trans*ission perfor*an#e #an e analy=ed ased on te analysis ite*s in te
&5/S=/C=4K=/&S&*D=/A-&and 5/S=/C=4K=/&S&*D=/A-&
wor:seets.
/C /etransmission /ate
"e retrans*ission rate of %C data lo#:s refle#ts te trans*ission @uality at te %C layer.If te trans*ission @uality of te * or &-+is interfa#e is poor$ te re#eiing end re@uests
te sending end to retrans*it data. "erefore$ te retrans*ission rate of %C data lo#:s
refle#ts te trans*ission @uality of te * and &-+is interfa#es to so*e e4tent.
9or details aout ow to analy=e and opti*i=e te trans*ission @uality of te * interfa#e$
see te Guide to GSM Network Evaluation of Coverage and Interference. Rou #an deter*ine
te trans*ission @uality of &-+is interfa#e ased on te 9 oer te &-+is interfa#e$trans*ission alar*s$ and #lo#: alar*s.
"e #oding s#e*e is dyna*i#ally adNusted during &P' data trans*ission. en a low-rate#oding s#e*e is used$ data lo#:s #ontain *ore redundant data and te data trans*ission rate
is low$ ut te reliaility of data trans*ission is ig. en a ig-rate #oding s#e*e is
used$ data lo#:s #ontain less redundant data and te data trans*ission rate is ig$ ut te
reliaility of data trans*ission is low. "erefore$ if te trans*ission @uality of te * or &-+is interfa#e is poor$ you are adised to use a low-rate #oding s#e*e to otain ig-@uality
data trans*ission$ i*proing user e4perien#e. sing a ig-rate #oding s#e*e *ay not
i*proe user e4perien#e as e4pe#ted and *ay een deteriorate user e4perien#e. "e *etodsfor sele#ting a low-rate #oding s#e*e are as follows
'ele#t a low-rate initial #oding s#e*e.
9or &P' seri#es$ in#rease diffi#ulties in #onerting a low-rate #oding s#e*e to a
ig-rate #oding s#e*e and de#rease diffi#ulties in #onerting a ig-rate #odings#e*e to a low-rate #oding s#e*e.
9or &P' seri#es$ sorten te 6P period to i*proe te sensitiity of *easure*ent
reports (s) to #anges in te trans*ission @uality of te * interfa#e to ensure tat
appropriate #oding s#e*es are dyna*i#ally sele#ted and used.
'ele#t te 6"' reporting 6 algorit* for adNusting te uplin: #oding s#e*e toensure tat te uplin: #oding s#e*e is appropriate to te trans*ission @uality of te *
interfa#e.
9or details aout para*eters related to te #oding s#e*e$ see se#tion >.3.1P' 6asi#Para*eters.
5
5/23/2018 GSM Wireless PS Performance Analysis Guide V1.0(20120615)
&' iress P' Perfor*an#e +nalysis &uide 2 +nalysis 'yste*
ate of "rans*itted rror 9ra*es (8u*er of e#eied Ce#: rror "+ 9ra*es L8u*er of e#eied
5/23/2018 GSM Wireless PS Performance Analysis Guide V1.0(20120615)
&' iress P' Perfor*an#e +nalysis &uide 2 +nalysis 'yste*
$ %ser &'perience Analysis an! Optimi"ation$.1 C -hroughput Analysis
"e %%C trougput on te lie networ: #an e otained ased on te weigted alue of te
uplin: and downlin: &P'J&P' %%C trougputs. Ce#: weter te %%C trougput
*eets te standards y #o*paring it wit its aseline alue.
-ale 1.1 6'C-leel %%C trougput ealuation
4SC *ame C -hroughput
4aseline alue
6+it?s7
C -hroughput on
the ive *etwor+
6+it?s7
Analysis /esult
DouleH+ ;>.?0 >?.3A 8F. "erefore$ te *ain fa#tor affe#ting te %%C trougput on te lie networ: is
insuffi#ient #annel resour#es.
-ale 1.2 +nalysis on fa#tors affe#ting 6'C-leel %%C trougput
4SC *ame A00ecting 8actor KI
4aseline
Actual
alue
A00ecting
ercentage
DouleH+ "rougout Capa#ityof %C 'ignal-
ti*e(:ps)
2;.>7 27.1> 1;.15F
DouleH+ 9re@uen#e of "69 2 1.?1 0.00F
DouleH+ Content of Cannel 0.A7 0.>2 A2.A>F
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5/23/2018 GSM Wireless PS Performance Analysis Guide V1.0(20120615)
&' iress P' Perfor*an#e +nalysis &uide 2 +nalysis 'yste*
2.57 0.;A A5.31F 17.71F 0.1AF
9ollowing des#ries ow to analy=e ea# affe#ting fa#tor.
$.1.2 /C Single
5/23/2018 GSM Wireless PS Performance Analysis Guide V1.0(20120615)
&' iress P' Perfor*an#e +nalysis &uide 2 +nalysis 'yste*
-ale 1.2 +nalysis on 6'C-leel %C single-ti*eslot affe#ting fa#tors
4SC *ame A00ecting 8actor KI 4aseline Actual alue A00ecting
ercentage
DouleH+ 6P1?T31 atio A7.00F A3.A?F 7.A7F
DouleH+ ate of 9ail +ppli#ation
+tte*pts of +is "i*eslot6e#ause of no Idle "i*eslot
30.00F A3.5?F ?5.17F
.73 ?5.57F ?1.00F 0.00F 100.00F
4&1(
5/23/2018 GSM Wireless PS Performance Analysis Guide V1.0(20120615)
&' iress P' Perfor*an#e +nalysis &uide 2 +nalysis 'yste*
-ale 1.$ e#eie leel and #arrier-to-interferen#e ratio supported y ea# #oding s#e*e
Co!ing Scheme /eceive evel 6!4m7 -%3 Carrier U -?> 20
C'; U -?3 23.7
C'A U -?0.7 2A.7
C'? U -A> 30
roportion o0 Ais -imeslot Application 8ailures Due to *o I!le -imeslots
+is ti*eslot suffi#ien#y is a prere@uisite for #ells using ig-rate #oding s#e*es. If idle
ti*eslots are insuffi#ient$ #annels #annot use ig-rate #oding s#e*es. "ale 1.7des#rieste *apping etween te nu*er of re@uired idle ti*eslots and #oding s#e*es.
-ale 1.) apping etween te nu*er of idle ti*eslots and #oding s#e*esCo!ing Scheme *umer o0 /e@uire! I!le -imeslots
C'1 to C'2 0
C'3 to C'5 1
C'1 to C'2 0
C'3 to C'> 1
C'; 2
C'A to C'? 3
In te -D=Ais Inter0ace /esource &valuationwor:seet of te
5/23/2018 GSM Wireless PS Performance Analysis Guide V1.0(20120615)
&' iress P' Perfor*an#e +nalysis &uide 2 +nalysis 'yste*
PDCH *ultiple4ing degree needs to de#rease to i*proe te single-user trougput.
9or te #ells wose uplin: and downlin: PDCH "69 *ultiple4ing degrees are iger tan 2$
perfor* te following opti*i=ation operations
9or te #ells were #annels are insuffi#ient and "CHs are not #ongested$ *ore PDCHs#an e otained y i*proing te *a4i*u* PDCH rate tresold$ de#rease te uplin: ordownlin: *ultiple4ing dyna*i# #annel #onersion tresold$ and set te PDCH
downlin: *ultiple4ing tresold to A0.
9or te #ells were "CHs are #ongested$ te re#o**ended opti*i=ation operation is
#apa#ity e4pansion.
$.1.$ Channel Satis0action Degree Analysis
Cannel satisfa#tion degree is te ratio of te a#tual nu*er of allo#ated #annels to te '
*ulti-ti*eslot #apaility. "e iger te #annel satisfa#tion degree$ te *ore te nu*er of
#annels allo#ated to #ells$ te iger te proaility tat te nu*er of allo#ated #annels
*eets te re@uire*ents of ' *ulti-ti*eslot #apaility.
If te #annel satisfa#tion degree is lower tan A7F$ te nu*er of PDCHs in te #ell is
insuffi#ient. "e opti*i=ation *etods are as follows
If te nu*er of ti*es te 6'C re#lai*s dyna*i# PDCHs is e@ual to te nu*er of
ti*es te 6'C re#lai*s dyna*i# PDCHs in load state$ ongoing C' seri#es pree*pt#annels o##upied y P' seri#es. In tis situation$ you need to add stati# PDCHs. In
addition$ set evel o0 reempting Dynamic Channelto &&16*o preempt o0CCHs7.
Ce#: te analysis ite*s in te DS C% Occuption /ate o0 D%wor:seet. en
te alue of +erage 8u*er of PDCHs +#tiated on D'P is greater tan 50$ dyna*i#PDCHs in so*e #ells #annot e #onerted e#ause a single D'P rea#es te #annel
a#tiation upper li*it. +s a result$ #annels are insuffi#ient. en tis o##urs$ tenu*er of a#tiated #annels on #ertain D'P is great. It is re#o**ended tat #ell
redistriution e perfor*ed to alan#e te #ell distriution on D'Ps. If *ost D'Pse4perien#e tis type of prole*$ it is re#o**ended to add DPPs.
9or te #ells were #annels are suffi#ient and "CHs are not #ongested$ i*proe te
*a4i*u* PDCH rate tresold in te #ell to otain *ore PDCHs.
9or te #ells were "CHs are #ongested$ te re#o**ended opti*i=ation operation is
#apa#ity e4pansion.
$.2 Delay AnalysisDelay #an e analy=ed ased on PCH data instead of traditional traffi# statisti#s. PCHs are
i*proed sin#e &6'' 13.0$ and terefore tere is no tool for at# analy=ing PCHs. In tis
situation$ you need to analy=e PCHs one y one y using te Insigt'arp tool. 9or details
aout ow to use te Insigt'arp tool$ see se#tion>.1elated "ools. Delay #an e analy=edased on te data in te PCH delay-sensitie seri#e infor*ation area. "e :ey /PI to e
analy=ed is aerage delay in seri#e intera#tion response. "e for*ula for #al#ulating te
aerage delay in seri#e intera#tion response is as follows
+erage delay in seri#e intera#tion response +erage delay in sending PDs L +erage
delay in re#eiing PDs L +erage delay in PD round trip oer te & interfa#e
"ale 1.1des#ries te for*ulas for #al#ulating ea# /PIs.
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5/23/2018 GSM Wireless PS Performance Analysis Guide V1.0(20120615)
&' iress P' Perfor*an#e +nalysis &uide 2 +nalysis 'yste*
-ale 1.1 Delay /PIs
KI 8ormula
+erage delay in sending
PDs
"otal duration for sending PDsJ"otal nu*er of sent PDs
+erage delay in re#eiingPDs
"otal duration for re#eiing PDsJ"otal nu*er of re#eiedPDs
+erage delay in PDround trip oer te &
interfa#e
"otal interal etween uplin: and downlin: PDsJ'tatisti#alti*es for *easuring te interal etween uplin: and
downlin: PDs
"e aerage delay in sending PDs and aerage delay in re#eiing PDs refle#t te downlin:
and uplin: delays on te 6'' side$ respe#tiely. "e aerage delay in PD round trip oer te
& interfa#e refle#ts te delay aoe te & interfa#e$ in#luding te uplin: and downlin:pro#essing duration on te & interfa#e and #ore networ:.
9or te #ells wit long delay on te 6'' side$ #e#: weter a##essiility$ retainaility$ and
trans*ission perfor*an#e /PIs are nor*al. If tey are anor*al$ opti*i=e te* y referring
to asso#iated *etods.
9or te #ells wit long delay aoe te & interfa#e$ #e#: te lin:s oer te & interfa#e or
#onta#t #ore networ: engineers to lo#ate prole*s on te #ore networ:.
$.3 Cell /eselection
"e :ey /PI for analy=ing #ell resele#tion on te 6'' side is "69 anor*al release rate due
to flus. If te alue of tis /PI is greater tan 1F$ #ell resele#tion greatly affe#ts seri#es. In
tis situation$ you need to set te #ell resele#tion para*eters and adNust #oerage.
-ale 1.1 6'C-leel #ell resele#tion analysis
KI /ecommen!e! alue
% &P' "69 drop rate due to 9lus G 1F
D% &P' "69 drop rate due to 9lus G 1F
% &P' "69 drop rate due to 9lus G 1F
% &P' "69 drop rate due to 9lus G 1F
5/23/2018 GSM Wireless PS Performance Analysis Guide V1.0(20120615)
&' iress P' Perfor*an#e +nalysis &uide 2 +nalysis 'yste*
-ale 1.2 Cell-leel #ell resele#tion analysis
Cell
*ame
-48 !rop
rate !ue to
8lush
*umer o0
-imes a Cell
Is Selecte! y
S
/atio o0 Cell
/eselections y S
at Short Interval
/atio o0 Cell
ing
5/23/2018 GSM Wireless PS Performance Analysis Guide V1.0(20120615)
&' iress P' Perfor*an#e +nalysis &uide 2 +nalysis 'yste*
) *etwor+ Characteristics &valuation).1 S Support Capaility &valuation
+naly=ing ' support #apailities on te lie networ: elps in guiding #usto*ers to use
so*e fun#tions and to learn aout ' infor*ation.
"is se#tion proides te proportion of ' support #apailities on te lie networ: ased on
/PIs. 9re@uen#y and support #apaility$ en#ryption algorit* support #apaility$ CD+
support #apaility$ "D-'CD+ support #apaility$ and CD+ support #apaility$ networ:assisted #ell #ange (8+CC)$ and dual transfer *ode (D") are *easured after C' #alls are
initiated or wen te #lass*ar: otained during an in#o*ing 6'C andoer #ontains response
support #apaility. D+$ *ulti-"69$ and P' andoer support #apailities are *easured wen
oter support #apailities are otained after P' seri#es are initiated. "e proportions of '
support #apailities proided in tis do#u*ent are *easured ased on #all ti*es. "erefore$support #apailities for an ' *ay e *easured seeral ti*es e#ause of #alls initiated for
seeral ti*es.
"e proportions of ' support #apailities #an e otained fro* te S Capaility Au!it
wor:seet.
).1.1 S 8re@uency 4an! Support Capaility
' fre@uen#y and support #apaility elps #usto*ers properly plan and fully utili=e teir
fre@uen#y and resour#es. 9or e4a*ple$ resour#es on ?00 H= and are insuffi#ient ut
resour#es on 1A00 H= are suffi#ient. eanwile$ 's on te &' networ: support ot
?00 H= and 1A00 H= fre@uen#y ands. In tis situation$ it is re#o**ended tat te dual-
and networ: e deployed.
5/23/2018 GSM Wireless PS Performance Analysis Guide V1.0(20120615)
&' iress P' Perfor*an#e +nalysis &uide 2 +nalysis 'yste*
-ale 1.1 ' fre@uen#y and support #apaility ealuation
4SC
*am
e
-erminal
o0
Supportin
g5S(>>
4an!
-erminal
o0
Supportin
g5S(>>
& 4an!
-erminal
o0
Supportin
g5S(>>
/ 4an!
-erminal
o0
Supportin
gDCS1B>>
4an!
-erminal
o0
Supportin
gCS1(>>
4an!
-erminal
o0
Supportin
g5SB)>
4an!
-erminal
o0
Supportin
g5S$B>
4an!
-erminal
o0
Supportin
g5S$)>
4an!
).1.2 S ulti
5/23/2018 GSM Wireless PS Performance Analysis Guide V1.0(20120615)
&' iress P' Perfor*an#e +nalysis &uide 2 +nalysis 'yste*
-ale 1.1 +nalysis on P' seri#e #apailities
4SC
*am
e
-erminal
o0
Supporti
ng D-
-erminal
o0
Supporti
ng5&/A*
1
-erminal
o0
Supporti
ng SSwitch
-erminal
o0
Supporti
ngDownlin
+
&5/S2
5/23/2018 GSM Wireless PS Performance Analysis Guide V1.0(20120615)
&' iress P' Perfor*an#e +nalysis &uide 2 +nalysis 'yste*
-ale 1.1 odel *apping etween te nu*er of uplin: "69 estalis*ents and uplin: traffi#
*umer o0
%plin+ S
Imme!iate
Assignments
*umer o0
%plin+ -48
&stalishments
%plin+
-ra00ic
6K47
-ale 1.2 odel *apping etween te nu*er of downlin: "69 estalis*ents and downlin:
traffi#
Average
Duration o0
Downlin+ -48s
6ms7
*umer o0
Downlin+ S
Imme!iate
Assignments
*umer o0 Downlin+
-48 &stalishments
Downlin+
-ra00ic 6K47
).2.3 Duty Cycle o0 Downlin+ -48 /elease Delay
+fter te last downlin: %C data lo#: is trans*itted on te networ: side and all tetrans*itted downlin: data lo#:s are re#eied$ te ' is not infor*ed to stop tis downlin:
"69. Instead$ te state of te last data lo#: is for#ily set to not re#eied and te 6P
flag of te last data lo#: is retrans*itted #ontinuously so tat te downlin: "69 is notreleased. During te downlin: delay release$ if te upper layer of te networ: side needs to
trans*it downlin: data$ te downlin: %C lo#: for unpa#:ing #an e trans*itted in tedownlin: "69 for delay release. "e state of te downlin: "69 is #anged fro* delay release
to downlin: trans*ission. In addition$ te ' *ust respond te Pa#:et Downlin: +#:J8a#:*essage troug te uplin: data lo#: of te 6P to e4#ange *essages wit te networ:
side. en te ' needs to send data$ te ' #an send te uplin: re@uest to te networ:
sides troug te Pa#:et Downlin: +#:J8a#: *essage wit te #annel re@uest des#ription.
'etting tis para*eter to a large alue results in a waste of radio resour#es$ adersely affe#ts
te a##essiility of oter 's on te networ:. In addition$ unne#essary signaling *ay o##upy
te #annel andwidt$ leading to a waste of downlin: resour#es.
'etting tis para*eter to a s*all alue results in #onstant downlin: "69 releases and
reestalis*ents and prolongs te delay wen a delay test for +tta# or Ping seri#es is
perfor*ed. "e original downlin: "69 is released @ui#:ly$ te suse@uent downlin: datatrans*ission *ust e i*ple*ented y estalising a new "69. In addition$ te suse@uent
uplin: data *ust e trans*itted on a new "69. "is as signifi#ant i*pa#t on te "69estalis*ent period and "69 estalis*ent su##ess rate.
Duty #y#le of downlin: "69 release delay spe#ifies te proportion of "69 release delay to te
total "69 period. If te duty #y#le of downlin: "69 release delay is too long and te "69#ongestion rate is ig$ prolong te downlin: "69 release delay to allow *ore 's to a##ess
te networ:.
"e 6'C- and #ell-leel downlin: "69 release delay and duty #y#le of downlin: "69 release
delay is displayed in te -48 Delay /elease -ime Au!itwor:seet.
Issue V1.0 (2011-12-31) Huawei Proprietary and Confidential
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2?
5/23/2018 GSM Wireless PS Performance Analysis Guide V1.0(20120615)
&' iress P' Perfor*an#e +nalysis &uide 2 +nalysis 'yste*
).2.$ Analysis on roportions o0 Dummy 4loc+s an! Signaling 4loc+s
it #ontinuous deelop*ent of P' seri#es$ te proportion of PDCHs to all "CHs in#reasesand te i*pa#t on te C' spee# @uality strengtens. In tis situation$ you need to perfor*
power #ontrol on P' seri#es to *ini*u* te interferen#e of P' seri#es to C' seri#es.
Perfor*ing power #ontrol on P' seri#es is to perfor* power #ontrol on du**y lo#:s. "egains on te networ: otained y P' power #ontrol depends on te proportion of du**y
lo#:s.
It is re#o**ended tat P' power #ontrol e disaled in te following s#enariosCells in '1 and '2 #onfiguration *ode. "is is e#ause PDCHs are #onfigured on te 6CCH
", in tis s#enario and te 6CCH ", *ust always trans*it power.
Cells are in '3 or '5 #onfiguration *ode and teir P' e@uip*ent traffi# olu*es (nu*er ofo##upied PDCHs) are lower tan >. In oter s#enarios$ weter power #ontrol is enaled
depends on te proportion of du**y lo#:s.
"e proportions of 6'C- and #ell-leel downlin: du**y lo#:s and proportions of 6'C- and
#ell-leel downlin: signaling lo#:s are displayed in te D%: an! essage 4OCK/atio Au!itwor:seet.
).3 ireless /esource Analysis
).3.1 CCCH /esource Analysis
6y analy=ing CCCH resour#es$ analy=e te nu*er of #onfigured CCCHs$ signaling load on
te lie networ:$ #onsu*ption of CCCH resour#es on C' and P' seri#es$ i*pa#t of CCCHresour#es on P' and C' seri#es$ and signaling loads for P' and C' seri#es. "is elps you
adopt appropriate solutions$ su# as a##urate paging and C' preferen#e and analy=e tepro*otion and wide use of e4tended 6CCH and dyna*i# *ulti-CCCH on te lie networ:.
"e analysis ite*s in te CCCH Signaling Channel /esouce Au!itwor:seet refle#t te
proportions of P' and C' paging flow in a #ell.
).3.2 ireless /esource Analysis
ireless resour#e analysis analy=es wireless resour#e #ongestion$ #onsu*ption of wireless
resour#es on PDCHs and "CHs$ P' earing effi#ien#y$ alf-rate proportion. +naly=ing te
related /PIs elps in learning aout te resour#e usage and sele#ting te areas and #ells to e
opti*i=ed. If te C' alf-rate proportion is ig and te P' earer effi#ien#y is low$ analy=ingte #ause of low P' earer effi#ien#y elps in perfor*ing opti*i=ation y adNusting te
following para*eterselease delayplin: ultiple4 "resold of Dyna*i# Cannel ConersionJDownlin: ultiple4 "resold
of Dyna*i# Cannel Conersion
"i*er of eleasing Idle Dyna*i# Cannel
"e analysis ite*s in te /8 Channel oa! Au!itwor:seet refle#ts te 6'C- and #ell-leel
resour#e usage.
Issue V1.0 (2011-12-31) Huawei Proprietary and Confidential
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5/23/2018 GSM Wireless PS Performance Analysis Guide V1.0(20120615)
&' iress P' Perfor*an#e +nalysis &uide 2 +nalysis 'yste*
, Appen!i',.1 /elate! -ools
-ale 1.1 elated tools
-ool Description How to Otain
8IC Data #olle#tion9or details aout ow to otain '
5/23/2018 GSM Wireless PS Performance Analysis Guide V1.0(20120615)
&' iress P' Perfor*an#e +nalysis &uide 2 +nalysis 'yste*
%ireless Maintenance.
ttpJJsupport.uawei.#o*JsupportJpagesJnewsJ8ewsInfo+#tion.dodo#BidI8000003>A;3#olIDA 700 +fter eli*inating teeffe#t of lin: @ualityand radio resour#e
#ongestion$ in#reasete alue of -31,Btoi*proe te uplin:
"69 assign*ent
su##ess rate. "is *ay
prolong te delay ofuplin: "69
assign*ent.
'"
&C%%P'6+'
"31?2 700 en networ:resour#es are
suffi#ient$ tat is$ te
&P' seri#e#ongestion rate is low$set -31(2to a ig
alue to a##elerate
"69 estalis*ent andi*proe data
trans*ission
perfor*an#e.
esour#e a4i*u*
atio
"resold ofPDCHs in a
Cell(F)
30 '"&C%%P'CH
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5/23/2018 GSM Wireless PS Performance Analysis Guide V1.0(20120615)
&' iress P' Perfor*an#e +nalysis &uide 2 +nalysis 'yste*
Category arameter
*ame
De0ault
alue
/ecommen!e!
alue
Setting rinciple Comman!
%eel of
Pree*pting
Dyna*i#Cannel
%V%0 %V%0 If "CHs are suffi#ient
ut e#lai*ed
Dyna*i# PDCH rate isig$ set tis para*eter
to &&1.
Dyna*i#
CannelConersion
Para*eter of
Con#entri#Cell
5/23/2018 GSM Wireless PS Performance Analysis Guide V1.0(20120615)
&' iress P' Perfor*an#e +nalysis &uide 2 +nalysis 'yste*
Category arameter
*ame
De0ault
alue
/ecommen!e!
alue
Setting rinciple Comman!
plin:
Default C'
"ype
C'2 C'2 If te trans*ission
@uality of te *
interfa#e is unstaleand a ig-rate initial
uplin: #oding s#e*e
is used$ te "69
estalis*ent su##essrate *ay e low. If a
low-rate #oding
s#e*e is used$ te"69 estalis*ent
su##ess rate in#reases
ut te uplin:
trougput and
proportion of ig-rate#oding s#e*es
de#rease.
Downlin:
9i4ed C'
"ype
89I,
D
89I,D
Downlin:
Default C'
"ype
C'> C'> se a ig-rate initial
#oding s#e*e to
in#rease te proportionof ig-rate #oding
s#e*es. "is *ay
in#rease te
retrans*ission rate.
plin: 9i4ed
C' "ype
89I,
D
89I,D '" &C%%P'C'plin:
Default C'
"ype
C'1 C'1 If te trans*ission
@uality of te *
interfa#e is unstaleand a ig-rate initial
uplin: #oding s#e*e
is used$ te "69
estalis*ent su##essrate *ay e low. If a
low-rate #oding
s#e*e is used$ te
"69 estalis*entsu##ess rate in#reases
ut te uplin:
trougput andproportion of ig-rate
#oding s#e*es
de#rease.
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5/23/2018 GSM Wireless PS Performance Analysis Guide V1.0(20120615)
&' iress P' Perfor*an#e +nalysis &uide 2 +nalysis 'yste*
Category arameter
*ame
De0ault
alue
/ecommen!e!
alue
Setting rinciple Comman!
Downlin:
9i4ed C'
"ype
89I,
D
89I,D
Downlin:
Default C'
"ype
C'2 C'2 se a ig-rate initial
#oding s#e*e to
in#rease te proportion
of ig-rate #odings#e*es. "is *ay
in#rease te
retrans*ission rate.
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