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TIMERS
RFOPTIMIZATION
ENGINEERINGACCESSNETWORK
PMCL[MOBILINK]
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FOREWORDThe document aims to describe various timers implemented in the
GSM network. While reasonable efforts have been made to assure the
accuracy
of
this
document,
PMCL
assumes
no
liability
resulting
from
any
inaccuracies or omissions in this document, or from the use of the
informationobtainedherein.
PMCL reserves the right to make changes from time to time in the
content of this document and hereof with no obligation to notify any
personofrevisionsorchanges.
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TABLEOFCONTENTS1.0 Introduction 52.0 Whatdoesthemanualcover? 53.0 Whytheneedtostudytimers? 54.0 TimerCategorization 6
4.1 EntityBasedCategorization 64.2 ProcessFlowBasedCategorization 6
5.0 Breakdown 76.0 GSMTimers 9
6.1 CallSetup 106.1.1 T3120 126.1.2 T3126 136.1.3 T3101 146.1.4 T3230 156.1.5 T303 166.1.6 T310 176.1.7 T11 186.1.8 T10 196.1.9 T313 206.1.10 T3107 216.1.11 T1 22
6.2 CallClearing 236.2.1 T13 236.2.2 T3111 246.2.3 T3109 256.2.4 T3110 26
6.3 Handover 276.3.1 T3103 286.3.2 T8 296.3.3 T7 306.3.4 TQHO 316.3.5 T3121 32
6.4 GPRS 326.4.1 T3182 336.4.2 T3164 346.4.3 T3198 356.4.4 T3180 366.4.5 T3190 376.4.6 T3192 386.4.7 T3200 39
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6.4.8 T3162 406.4.9 T3168 416.4.10 T3170 426.4.11 T3172 436.4.12 T3176 446.4.13 T3188 456.4.14 T3322 466.4.15 T3380 476.4.16 T3385 486.4.17 T3386 496.4.18 T3390 506.4.19 T3395 516.4.20 T3158 526.4.21 T3166 536.4.22 T3169 546.4.23 T3174 556.4.24 T3182 566.4.25 T3178 576.4.26 T3184 586.4.27 T3191 596.4.28 T3193 606.4.29 T3195 616.4.30 T3310 626.4.31 T3312 636.4.32 T3314 646.4.33 T3321 65
6.5 Miscellaneous 666.5.1 T3210 666.5.2 T3128 676.5.3 T3211 686.5.4 T3212 696.5.5 T3220 70
7.0 CompiledList 717.1 MotorolaTimersList 717.2 AlcatelTimersList 737.3 HuaweiTimersList 76
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1.0 INTRODUCTIONLikeany otherwirelesstechnology witha limitedpool of resources,
GSMresourceallocationandterminationdependsprimarilyontimers.The
functionality
and
protocols
may
vary,
but
the
presence
of
timer
based
signaling and resource allocation is ubiquitous. Timer implementation is
presentineachdomainoftheGSMsystemfromMStoNSSend.
2.0 WHATDOESTHISMANUALCOVER?ThisdocumentaimstodescribeallthemajorBSStimers involved in
theGSMarchitecture.Thetimersarecategorizedintodifferentsubgroups,
dependingupontheirparententityandtheprocessflowtheyareinvolved
in.The
document
proceeds
further
by
giving
a
detailed
explanation
of
each
timeralongwithitsimplementationinthePMCLnetwork.
3.0 WHYTHENEEDTOSTUDYTIMERS?As already highlighted, timer implementation is present throughout
theGSMarchitecture.Timerseffectcallsetupprocedures,handovers,call
clearing, data usage (GPRS), VAS facilities; in short, everything that a
customermight
do
to
access
and
utilize
the
GSM
network.
Therefore,
for
a
high quality network, it is imperative to have impeccable timing. Precise
synchronization and timing improves call signal hand over performance
between base stations; and, as an added benefit, reduces customer
complaints.GSMnetworksaredependenton strictsynchronizationof the
basestationstofacilitatecallhandovers.
Furthermore, the reason for a deep understanding of timers is also
reenforcedbythemultivendorimplementationpresentatalllevelsofthe
network.
Such
a
scenario
demands
all
database
discrepancies
to
be
eliminatedtoensurecoherenceandintervendorcompatibility.
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4.0 TIMERCATEGORIZATION4.1 ENTITYBASEDCATEGORIZATION
Ashighlightedearlier there are differentways of categorizing timers. One
categorization can be done on the basis of entity which includes the
followingcategories:
4.2 PROCESSFLOWBASEDCATEGORIZATION
A further classification of GSM timers can be done on the basis of
process flows involved in the system. These include the following basic
categories:
CallProcessingCallSetupCallRelease
Handovers GPRS Miscellaneous
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5.0 BREAKDOWN[PHASE1]The task of documenting the GSM timers is not an easy paced
procedure. The project is divided into two phases. The first phase
comprisedof
the
research
for
all
the
timers
involved
from
MS
to
BSS
as
per
the international GSM standards. In the second phase, vendor
implementationsofthesetimersweretakenintoconsideration.Acomplete
overviewofallthetimersinvolvedinPhase1isasunder:
Timer CallFlow Vendor Timer'sName Category DefaultValue Range
T3120 CallSetupMotorola MSTimer MSTimer Alcatel MSTimer MSTimer Huawei T3120 MSTimer MinisRACH
T+2S;MAX
5
MinisRACH
T+2S;MAX
5
T3126 CallSetupMotorola MSTimer MSTimer Alcatel MSTimer MSTimer Huawei T3126 MSTimer MinisRACH
T+2SMAX5
MinisRACH
T+2SMAX5
T3122 CallSetup Motorola wait_indication_parameter BTS none 0to255secAlcatel T3122 MSTimer 0to255secHuawei T3122 CellTimer 10sec 0255 sec
T3101 CallSetup Motorola rr_t3101 BTS 5sec 0to1000secAlcatel T3101 BSClevel 3sec 0to25.5secHuawei T3101 CellTimer 3sec 0.5to60sec
T3230
CallSetup
Motorola MSTimer MSTimer Alcatel
MS
Timer MS
Timer
Huawei T3230 MSTimer 15sec 15secT303 CallSetup Motorola MSTimer MSTimer Alcatel MSTimer MSTimer
Huawei T303 MSCTimer 20sec T310 CallSetup Motorola MSTimer MSTimer Alcatel MSTimer MSTimer
Huawei T310 MSCTimer 20sec T11 CallSetup Motorola bssmap_t11 BTS 28sec 0to1000secAlcatel T11 BSS 6sec 0to19 sec
Huawei T11 BSCTimer 8sec 1to30secT10
Call
Setup
Motorola bssmap_t10 BTS 28sec 0to1000secAlcatel
bssMapT10 BSS 14
sec
Huawei T10 BSCTimer 7sec 1to20secT313 CallSetup Motorola MSCtimer Alcatel T313 MS Timer
Huawei T313 MSCTimer 30sec 30secT8 Handover Motorola bssmap_t8 BTS 28sec 0to1000secAlcatel bssMapT8 BSS 14sec 0to25.5sec
Huawei T8 CellTimer 10sec 0.5to60secT3103 Handover Motorola rr_t3103 BTS 30sec 0to1000sec
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Alcatel T3103 BSS 16.5 sec 0to25.5secHuawei T3103 CellTimer 10sec 0.5to60sec
T1 GPRS Motorola bssmap_t1 BSC 30sec0to1000000
msec
Alcatel bssMapT1 BSS 16sec 10to25.5secHuawei T1 BSCTimer 30sec 1to300 sec
T13 CallClearing Motorola bssmap_t13 BSC 40sec 0to1000secAlcatel bssMapT13 BSS 15sec 0to6553.5secHuawei T13 BSCTimer 150sec 1to300sec
T7 Handover Motorola bssmap_t7 BSC 30sec 0to1000secAlcatel bssMapT7 BSS 5sec 0to20 secHuawei T7 CellTimer 10sec 0.5to60sec
TQHO Handover Motorola bssmap_tqho BSC 30sec 0to1000secAlcatel T_QHO BSS 3sec 0to20secHuawei TQHO BSCTimer 8sec 1to30sec
T3111 CallClearing Motorolarr_t3111_sd BTS 1.5sec 0to1000sec
rr_t3111_tch BTS 1.5sec 0to1000sec
Alcatel T3111 BSS 0.5sec 0to2 secHuawei T3111 CellTimer 1sec 0.5to60sec
T3109 CallClearing Motorola rr_t3109 BTS 14.4sec 0to1000secAlcatel T3109 BSS 12sec 0to35secHuawei T3109 CellTimer 27sec 135sec
T3121 Handover Motorola MSCTimer Alcatel T3121 BSS 14sec 0to25.5secHuawei T3121 CellTimer 10sec 0.5to60
T3107 CallSetup Motorola RRSM_T10 BTS 28sec 0to1000secAlcatel T3107 BSS 14sec 0to25.5secHuawei T3107 CellTimer 10sec 0.5to60sec
T200 Configurational Motorola lapd_t200_timer BTS 2.5sec 1.4to5secAlcatel T200 BSS 0.3sec 0.3to1secHuawei T200(FACCH/F/H) CellTimer 0.05sec 1to0.255sec
T9101 CallClearing Motorola Alcatel T9101 Network 10sec 0to6553.5secHuawei SCCP_TREL(s) BSCTimer 15sec 10to20sec
T9104 CallClearingMotorola Alcatel T9104 BSS 2sec 0to25.5secHuawei TCLEARREQ(BSC) BSCTimer 5sec 1to150sec
TNT3(MSC) MSCTimer 6sec 1to120sec
T9108 CallClearing Motorola Alcatel T9108 Network 3sec 0to6553.5secHuawei
T3110 CallClearingMotorola MSTimer MSTimer Alcatel MSTimer MSTimer Huawei T3110 MSTimer 10sec 0.5to60sec
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6.0 GSMTIMERSThe description of GSM Timers in isolation can often lead to
confusion for the engineer. To ensure uniformity and ease of
understanding,a
format
has
been
used
to
describe
in
detail
each
timer.
The
formatisasgivenbelow.
y TimerNameThis field will include the name of the Timer, as used in the
internationalGSMstandards.
yCategory
This field will indicate the placement of the timers in the GSM
network.ForExampleeitheratimerisusedinCallSetupprocedures
oritisusedtoadministeraHandover.
y StartEventThisfieldwillincludetheeventwhichtriggersthetimer.
y StopEventThisfieldwillincludetheeventuponwhich,thetimerstops.
y ExpiryEventThisistheeventwhichtakesplace,oncethetimerhasexpired.
Optional field include the values used by the vendors, ranges and
defaultvalues.
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6.1 CALLPROCESSINGThis section deals with timers that essentially make up the call
requestandcallsetupprocedure.Askimthroughthecallflowshownbelow
willhelp
give
the
reader
an
idea
of
the
positioning
of
the
timers
and
their
importance.
Details for each of the mentioned timers will follow along with
suitableinformationonthem.
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CallProcessing(Contd...)
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6.1.1 T3120CategoryThis timer is included in the Call Request procedure which starts with the
RACHrequest.
StartEventThistimerstartswhentheRACHrequestissenttothenetwork.
StopEventThetimerstopsoncetheRACHacknowledgmentisreceived.
ExpiryEventOnce the timer expires, the RACH request is reTransmitted on the air
interface.
Thedefaultvalueforthistimeris10seconds.
This is a MS based Timer and hence vendor implementation data is not
applicable.
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6.1.2 T3126
CategoryThis timer is included in the Call Request procedure which starts with the
RACHrequest.
StartEventThis timer starts when the maximum amount of Channel requests have
beensentbytheMS.
StopEventThetimerstopswhenimmediateassignmentmessageisreceivedfromthe
BSS.
ExpiryEventOnce
the
timer
expires,
the
procedure
for
immediate
assignment
is
aborted.
ThevalueofthistimerdependsonthesettingofRACHretransmission.
This is a MS based Timer and hence vendor implementation data is
unavailable.
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6.1.3 T3101CategoryThis timer is included in the Call Setup procedure which starts with the
immediateassignmentprocedure.
StartEventThis timer starts when the immediate assignment message is sent to the
MSbytheBSSentity.
StopEventThetimerstopswhentheEstablishindicationmessageissentbytheMSto
theBSSentity.
ExpiryEventOncethetimerexpires,theprocedureforcallsetupisaborted.
Thevendorbasedvaluesforthistimeraregivenbelowforreference.
Motorola Alcatel HuaweiT3101 2sec 3sec 3sec
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6.1.4 T3230CategoryThis timer is included in the Call Setup procedure which starts with the
immediateassignmentprocedure.
StartEventThistimerstartswhentheCMservicerequestissentbytheMStotheBSS
entity
StopEventThetimerstopswhentheMSreceivesthemessageofCMServicerequest
acknowledged.ItisalsostoppedincaseaCMservicerejectisreceived.
ExpiryEventOncethetimerexpires,thereleaseindicationisprovidedtotheBSSentity.
Thedefaultvalueforthistimeris15seconds
This is a MS based Timer and hence vendor implementation data is
unavailable.
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6.1.5 T303CategoryThis timer is included in the Call Setup procedure which starts with the
immediateassignmentprocedure.
StartEventThistimerstartswhentheUAframefortheSDCCHconnection isreceived
bytheMS.
StopEventThetimerisstoppedwhentheCMservicerequestissentbytheMS.
ExpiryEventIncaseofanexpiryeventofthistimer,theCallsetupprocedureisaborted.
Thedefault
value
for
this
timer
is
20
seconds
This is a MS based Timer and hence vendor implementation data is
unavailable.
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6.1.6 T310CategoryThis timer is included in the Call Setup procedure which starts with the
immediateassignmentprocedure.
StartEventThisTimerstartswhentheMSreceivesCallproceedingmessage.
StopEventThe timer stops once the Altering procedure begins and the call is
established.
ExpiryEventIncasethetimerexpiresandthealteringprocedurehasnotbegun,thecall
setupprocedureisabortedandNouserRespondingmessageissent.
Thedefaultvalueforthistimeris20seconds
This is a MS based Timer and hence vendor implementation data is
unavailable.
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6.1.7 T11CategoryThis timer is included in the Call Setup procedure which starts with the
immediateassignmentprocedure.
StartEventThis timer starts when an assignment resource request is queued by the
BSSentity.
StopEventThetimer isstoppedwhentheresourcerequest isallocatedaresourceby
theBSSentity.
ExpiryEventOncethetimerexpires,theresourcerequestisrejectedandthecallsetup
procedureisaborted.
Thevendorbasedvaluesforthistimeraregivenbelowforreference.
Note:IfthevalueofT11timeriskeptmorethanthevalueofassign_successfultimer[Motorola],thiscouldleadtopotentialmaskingofCallSetupBlocking.CSSR
Motorola Alcatel HuaweiT11 10sec 6sec 8sec
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6.1.8 T10CategoryThis timer is included in the Call Setup procedure which starts with the
immediateassignmentprocedure.
StartEventThis timer starts when assignment request is sent to the MS by the BSS
entity.
StopEventThetimerisstoppedwhentheassignmentcompletemessageissentbythe
MStotheBSSentity.
ExpiryEventOnce the timer expires, the assignment request is released and the call
setupprocedureisaborted.
Thevendorbasedvaluesforthistimeraregivenbelowforreference
Motorola Alcatel HuaweiT10 11sec 14sec 7sec
Note:IfthevalueofT10timeriskeptmorethanthevalueofassign_successfultimer[Motorola], this could lead to potential masking of RF_Losses_SD &Intra_cell_HO_Losses.
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6.1.9T313CategoryThis timer is included in the Call Setup procedure which starts with the
immediateassignmentprocedure.
StartEventThis timer starts when the call connect message is sent to the call
originatingmobile.
StopEventThe timer stops when connect acknowledge message is received by the
networkentityfromtheMS.
ExpiryEventIncaseofanexpiryevenofthistimer,thecallsetupprocedure isaborted
andthecallisreleased.
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6.1.10 T3107CategoryThis timer is included in the Call Setup procedure which starts with the
immediateassignmentprocedure.
StartEventThistimerstartswhentheassignmentcommandissentbytheBSSentityto
theMS.
StopEventThe timer is stopped when the Assignment complete message is received
byBSSentity.
ExpiryEventIncaseofanexpiryeventofthistimer,anassignmentfailurecommand is
sentandthechannelsarereleased.
Thevendorbasedvaluesforthistimeraregivenbelowforreference
Motorola Alcatel HuaweiT3107 11sec 14sec 10sec
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6.5.11T1CategoryThis timer is included in the Call Setup procedure which starts with the
immediateassignmentprocedure.
StartEventThistimerstartswhenablockingmessage issentbytheBSSentitytothe
MSCentityincaseofnonusableAinterfacetimeslot.
StopEventThetimerisstoppedwhenaBlockingacknowledgmentmessageisreceived
bytheBSSentity.
ExpiryEventOn first expiry of the timer, the BSS entity retransmits the Blocking
message. In case of a second expiry, the channel is set to nonusable
withoutMSCacknowledgment.
Thevendorbasedvaluesforthistimeraregivenbelowforreference
Motorola Alcatel HuaweiT1 20sec 16sec 30sec
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6.2 CALLCLEARINGOnce a call is ended, the resources that were dedicated to it now
need to be torn down so that they may be reused by other users. This
processis
called
call
clearing.
This
section
describes
the
timers
used
in
call
clearing
6.2.1T13CategoryThistimerisusedintheResetProcedureinitiatedbytheMSC.
StartEventThetimerstartswhenaResetmessageissentbytheMSCtotheBSSentity.
StopEventThetimerstopsonwhentheMSCreceivesResetAcknowledgementbythe
BSS
entity.
ExpiryEventIncaseofexpiryevent,theResetacknowledgmentissentbytheBSStothe
MSC.
Thevendorbasedvaluesforthistimeraregivenbelowforreference
Motorola Alcatel HuaweiT13 40sec 15sec 150sec
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6.2.2T3111CategoryThistimerisincludedintheCallreleaseprocedurewhichincludesreleasing
ofTCHchannels
StartEventThistimerstartswiththereceptionofReleaseindicationmessagefromthe
BSSentity.
StopEventThe timer stops when the BSS entity sends the message for RF channel
releasetotherespectiveBTS.
ExpiryEventThe expiry of this timer causes the forced channel release procedure to
startandthechannelisreleasedfromallendsofthenetwork.
Thevendorbasedvaluesforthistimeraregivenbelowforreference
Motorola Alcatel HuaweiT3111 1.5sec 0.5 1.5
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6.2.3T3109CategoryThistimerisincludedintheCallreleaseprocedurewhichincludesreleasing
ofTCHchannels
StartEventThis timer starts when the channel release message is sent by the BSS
entitytothesubsequentBTS.
StopEventThe timer is stopped when the release indication message is received by
theBSSentity.
ExpiryEventIncaseofanexpiryeventofthistimer,thechannelsarereleasedandcall
procedureisaborted.
Thevendorbasedvaluesforthistimeraregivenbelowforreference
Motorola Alcatel HuaweiT3109 15sec 12sec 15sec
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6.2.4T3110CategoryThistimerisincludedintheCallreleaseprocedurewhichincludesreleasing
ofTCHchannels
StartEventThistimerstartswhentheMSreceivestheChannelreleasemessagefrom
theBSSentity.
StopEventThe timer stops once the MS receives a layer 2message from the BSS
entityforchannelrelease.
ExpiryEventIncasethetimerexpires,thenormalchannelreleasecontinuestillthecall
isreleased.
Thedefaultvalueforthistimeris10seconds
This is a MS based Timer and hence vendor implementation data is
unavailable.
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6.3 HANDOVERThissectiondealswithtimersthatessentiallymakeupthehandover
procedure.Likecallprocessing,aladderdiagramforhandoverisalsogiven
belowfor
the
ease
of
the
reader.
Details for each of the mentioned timers will follow along with
suitableinformationonthem.
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6.3.1 T3103CategoryThistimerisusedintheHandoverProcedure.
StartEventThetimerstartswhentheinitiateHandovercommandissenttotheBTSby
theBSC.
StopEventTheTimerisstoppedwhenhandovercompletemessageisreceivedbythe
BSSentity.
ExpiryEventIn case the timer expires, the handover procedure is aborted and the
Handoverattemptistermedasunsuccessful.
Thevendorbasedvaluesforthistimeraregivenbelowforreference
Motorola Alcatel HuaweiT3103 30sec 16.5sec 30sec
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6.3.2 T8CategoryThistimerisusedintheHandoverProcedure.
StartEventThetimerstartswhentheHandovercommandissenttotheMSviatheBSS
entity.
StopEventTheTimerisstoppedwhenhandovercompletemessageisreceivedbythe
BSSentity.
ExpiryEventIn case the timer expires, the handover procedure is aborted and the
Handoverattemptistermedasunsuccessful.
Thevendorbasedvaluesforthistimeraregivenbelowforreference
Motorola Alcatel HuaweiT8 28sec 14sec 28sec
Note:IfthevalueofT8timerissetgreaterthanthevalueofT3103,thiscouldleadtopotential masking of Out_Intra_BSS_HO_LostMS in Intra BSS HOs &Out_Inter_BSS_HO_Return,Out_Inter_BSS_Equip_FailinInterBSSHOs.
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6.3.3T7CategoryThistimerisusedintheHandoverProcedure.
StartEventThetimerstartswhenaHandoverRequestmessageissenttotheMSCfor
anexternalBSChandover.
StopEventTheTimerisstoppedwhenhandoverresponsemessage isreceivedbythe
BSSentity.
ExpiryEventIn
case
the
timer
expires,
the
handover
procedure
is
aborted
and
the
Handoverattemptistermedasunsuccessful.
Thevendorbasedvaluesforthistimeraregivenbelowforreference
Motorola Alcatel HuaweiT7 10sec 5sec 10sec
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6.3.4TQHOCategoryThistimerdefinesthemaximumQueuingtimeforaHandoverrequest.
StartEventThe timer starts when the BSS places a Handover request in the resource
queueforallocation.
StopEventThetimer isstoppedwhentheHandoverrequest isallocatedtherequired
resourcebytheBSSentity.
ExpiryEventIncase of anexpiry eventof this timer, the handover request is removed
fromthequeueandthehandoverprocedureisaborted.
Thevendorbasedvaluesforthistimeraregivenbelowforreference
Motorola Alcatel HuaweiTQHO 30sec 5sec 8sec
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6.3.5T3121CategoryThistimerISrelatedwithinterBSCand2G/3Ghandovers.
StartEventThe timer is started when a request is sent for an interBSC or 2G/3G
handover.
StopEventThe timer is stopped when a Handover complete message is received by
theBSSentity.
ExpiryEventIn case of an expiry event of this timer, Clear request is sent and the
handoverprocedureisaborted.
Thevendorbasedvaluesforthistimeraregivenbelowforreference
Motorola Alcatel HuaweiTQHO NA 14sec 10sec
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6.4 GPRSTIMERS
6.4.1 T3182CategoryThis is an MS Based Timer and it is concerned with the RLC Window and
stallingofTBF.
StartEventIftheRLCtransmitwindowisfilledwithtransmittedblocksandanyofthem
isunacknowledged,thentheTBFwindowstallsandnomoreblockscanbe
set.Atthistime,T3182isstarted.
StopEventThe timer stops once the acknowledgment for all the transmitted blocks
hasbeenreceived.
ExpiryEventIfthetimerexpires,thenanothertimerN3102 isdecremented.TheRadio
resources arereleased and theMobile station tiresto reestablish the TBF
withthesamecellthroughpacketchannelrequest.
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6.4.2 T3164CategoryThisisanMSbasedtimerwhichisconcernedtheaccessproceduresduring
GPRSconnections.
StartEventMS access the network for a GPRS connection through the Packet data
request.TheBTSsendthepacket uplinkassignmentmessagethroughthe
USFaccess.Thetimerwillstartonreceptionofthisassignmentmessage.
StopEventThetimerwillstoponcetheUSFuplinkaccesshasalsobeengrantedonthe
downlink.
ExpiryEventIf
the
timer
expires,
and
the
access
has
not
been
granted
on
the
downlink,
thentheradioresourceswillbereleasedandtheMobilestationwillrepeat
thewholeprocedurefromthepacketdatarequestmessage.
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6.4.3 T3198CategoryThis is an MS based timer which is concerned the acknowledgement of
transmittedRLCBlocks
StartEventWhen a RLC block is transmitted by the Mobile station, Timer T3198 is
started.
StopEventThe timer is stopped when the acknowledgment of the transmitted RLC
blockisreceivedbytheMobilestation.
ExpiryEventIf the timer expires with no acknowledgment for the transmitted blocks,
the
RLC
blocks
is
tagged
as
NACK
in
the
MS.
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6.4.4 T3180CategoryThistimerisrelatedwiththedynamicallocationofUplinkTBFintheGPRS
connection.
StartEventThistimerisstartedduringthedynamicallocationoftheUplinkTBF.When
thelastblockissentaspermittedbytheUSFgranularity,theTimer3180is
startedwiththistransmission.
StopEventWhentheUSFisreceivedinthedownlinkbytheMS,thistimerisstopped.
ExpiryEventIn case the timer expires, the MS abandons the TBF and the access
procedure
is
repeated
with
the
same
cell.
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6.4.5 T3190CategoryThistimerisrelatedwiththedownlinkassignmentofPacketData.
StartEventThetimerisstartedwhentheMobilestationreceivesthedownlinkpacket
dataassignmentfromtheBSSentity.
StopEventThetimer isstoppedwhentheMobilestationreceivesthedownlinkblock
containingtheallocatedTFI.
ExpiryEventIn case the timer expires, the mobile station releases the radio resources
andabortstheTBFconnection.Inadditiontothis,theMobilestationstarts
monitoring
the
Common
Control
Packet
channel.
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6.4.6 T3192CategoryThistimerisconcernedwiththereleaseofPacketDataChannel
StartEventThetimerisstartedwhenthelastblockofdownlinkTBFisreceived.
StopEventIf
a
message
for
forced
release
of
Packet
Data
channel
is
received,
the
timer
isstopped.
ExpiryEventWhen the timer expires, the radio resources are released and the packet
datasessioncomestoanend.Itistobenotedthatthevalueofthistimeris
smallerthanT3193, inordertomake itsurethattheTFIofthisMS isnot
allocated
to
any
other
MS
in
the
mean
time.
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6.4.7 T3200CategoryThisTimerisrelatedwiththepartitionedtransmissionoftheRLCBlocks.
StartEventInthepartitionedtransmissionofRLCblocks,theRLCframesaredivedinto
segments with each segment having its own RTI (Radio Transaction
Indicator).IftheoneofthesegmentisnotreceivedwithitssubsequentRTI,
timerT3200isstarted.
StopEventThe timer is stopped when the correct segment with the following RTI is
received.
ExpiryEventIn
case
the
time
expires
and
the
correct
RTI
has
not
been
received,
then
the
wholecontrolblockisrejectedasaoneormoresegmentsaremissing.
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6.4.8 T3162CategoryThis timer is concerned with the queuing procedure employed during the
packetdataaccess.
StartEventThe timer is started when the MS receives the Packet Queue Notification
from the BSS entity. This message is in response to the Packet access
message.
StopEventThe timer is stopped in case of a packet assignment message or packet
accessesrejectmethod.
ExpiryEventIf
the
timer
expires
without
any
assignment
or
reject
message,
the
access
procedure is aborted and the mobile monitors the Packet data common
controlchannel.
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6.4.9 T3168CategoryThis timer is concerned with acquisition of TBF resources during a Packet
Datasession.
StartEventThistimerstartswhenapacketdatarequest issentbytheMobilestation
formoredataresourcesduringaTBFsession.
StopEventTheTimerisstoppedwhentheassignmentmessageisreceivedforthenew
uplinkresourceofTBF.
ExpiryEventIncasethetimerexpires,therequestofPacketDataresourcesisresentby
the
Mobile
Station.
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6.4.10 T3170CategoryThistimerdeterminesthetimespanforwhichtheMobilestationwillwait
aftersendingtheallowednumberofPacketDatarequests.
StartEventThetimerstartswhenthe lastoftheallowedPacketDataRequest issent
bytheMobilestationtotheBSSentity.
StopEventThetimerisstoppedwhentheMobilestationreceivestheuplinkresources
assignmentmessagefromtheBSSentity.
ExpiryEventIn case the timer expires, the access procedure is aborted and the upper
layers
are
informed
as
well.
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6.4.11 T3172CategoryThis Timer is concerned with the wait time used for retransmitting the
accessrequestforPacketData.
StartEventThe timer begins with the Packet Assignment Reject method and this
messagealsocontainstheamountoftime,thetimerhastoremainactive.
StopEventThe timer is stopped when the Packet Assignment message is received in
responsetotheaccessrequest.
ExpiryEventIn case the timer expires, a request of Packet Data resources is resent by
the
Mobile
Station.
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6.4.12 T3176CategoryThis timer is concerned with the signaling for cell change failure during
packetdatasession.
StartEventThetimerisstartedwhenthefirstmessageforcellchangefailureissentto
theBSSentity.
StopEventThetimerisstoppedifasuccessfulcellchangeoccursandtheconfirmation
messageissenttotheMobilestation..
ExpiryEventIncasethetimerexpires,thesignalingforthefailedcellchangesisstopped
and
the
Mobile
station
returns
to
normal
operation.
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6.4.13 T3188CategoryThistimerisusedforthefixedallocationofuplinkTBF.
StartEventThetimerisstartedwhentheMobilestationsendsarequesttoBSSentity
regardingaccessforthefixeduplinkTBF..
StopEventThe timer is stopped once the Mobile station receives the assignment
messagefortheuplinkresource.
ExpiryEventIncasethetimerexpires,therequestfortheresourcesisresent.
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6.4.14 T3322CategoryThistimerisinvolvedintheDetachprocessinthePacketDataconnection.
StartEventThetimerisstartedwhenthedetachrequestissentbytheMobilestation
totheBSSentity.
StopEventThe timer is stopped when the Mobile station receives the Detach accept
messagefromtheBSSentity.
ExpiryEventIn case the timer expires, the detach request is resent by the Mobile
station.
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6.4.15 T3380CategoryThistimerisusedinthePDPContextactivationprocedure.
StartEventThe timer is started when the Mobile station sends the request for PDP
contextactivation.
StopEventThetimerisstoppedwhentheBTSentitysendstheconfirmationmessage
fortheattachprocedure.
ExpiryEventIn case the timer expires, the request for PDP context is resent by the
Mobilestation.
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6.4.16 T3385CategoryThistimerisusedinthePDPContextactivationprocedure.
StartEventThetimer isstartedwhenthenetworksendstherequestforstartofdata
sessiontotheSGSN.
StopEventThetimerisstoppedwhentheSGSNentitysendstheconfirmationmessage
forthestartofdataconnection.
ExpiryEventIn case the timer expires, the request for data session is resent by the
network.
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6.4.17 T3386CategoryThistimerisusedinthePDPContextmodificationprocedure.
StartEventThetimer isstartedwhenthenetworksendstherequestformodification
ofPDPcontexttotheMS.
StopEventThe timer is stopped when the network receives the response of the
modificationmessage.
ExpiryEventIn case the timer expires, the request for modification for PDP Context is
resentbythenetwork.
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6.4.18 T3390CategoryThistimerisusedinthePDPContextdeactivationprocedure.
StartEventThetimerisstartedwhentheMSsendstherequestfordeactivationofPDP
contexttothenetwork.
StopEventThe timer is stopped when the MS receives the Deactivation accept
messagefromthenetwork.
ExpiryEventIn case the timer expires, the request for deactivation for PDP Context is
resentbytheMS.
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6.4.19 T3395CategoryThistimerisusedinthePDPContextdeactivationprocedure.
StartEventThe timer is started when the GPRS Sub network sends the request for
deactivationofPDPcontexttothenetwork.
StopEventThetimerisstoppedwhentheGPRSSubnetworkreceivestheDeactivation
acceptmessagefromthenetwork.
ExpiryEventIn case the timer expires, the request for deactivation for PDP Context is
resentbytheGPRSsubnetwork.
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6.4.20 T3158CategoryThistimerrelatestoPeriodbetweenmeasurementreports.The
Measurementreportsmaybemadeinpacketidlemodeorpackettransfer
mode,thetimerbeingsetbyNC_REPORTING_PERIOD_I(packetidle)or
NC_REPORTING_PERIOD_T(transfer).
StartEventSending
of
previous
measurement
report.
StopEventNone
ExpiryEventNext
measurement
report
sent.
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6.4.21 T3166CategoryThistimeristheOnephaseaccesscontentiontimer
StartEventWhenthefirstRLC/MACblockistransmitted
StopEventwhenapacketuplinkack/nackreturningTLLIisreceived
ExpiryEventOnexpiry,themobilestationmuststoptransmittingand
disconnectfromtheradioresources.Acontentionfailureorotherfailure
hasoccurred.
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6.4.22 T3169CategoryResponsetoUSFtolerancetimer
StartEventN3101reachesitsallowedmaximumcount,N3101_MAX.
StopEventNone
ExpiryEventOnexpiring,theUSFisreleased(whichmeansitcanbereassignedto
anothermobilestation).
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6.4.23 T3174CategoryHandover(cellchangeorder)failuretimer
StartEventWhentheGPRSsubnetworkisincommandofcellselection,itmaytellthe
mobilestationtochangetoanothercellwithpacketcellchangeorder.This
commandstartsT3174andthemobilestationchangesphysicalchannels,
sendingapacketchannelrequesttothenewcell.
StopEventWhenapacketuplinkassignmentisreceivedfromthenewcell.
ExpiryEventHandoverorcellchangehasfailedandT3176starts.
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6.4.24 T3182CategoryWindowstalltimeoutfordynamicallocation
StartEventWhentheRLCtransmitwindowkisfilledwithtransmittedRLC/MACblocks,
anyoneofwhichisunacknowledged,thentheTBFwindowstallsandno
moreblockscanbesent.T3182isthenstarted.
StopEventPacketuplinkacknowledgereceptionfromtheGPRSsubnetwork,allowing
thewindowtobeadvancedandtransmissionstoberesumed.
ExpiryEventN3102isdecremented(bytheamountPAN_DECsentinpacketsystem
information),disconnects
from
the
radio
resources
and
attempts
to
re
establishtheTBFinthesamecellwithpacketchannelrequest.
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6.4.25 T3178CategoryPacketidlemodeextendedmeasurementreportperiod
Thevalueofthistimeriscontainedintheidlemodeextended
measurementreportscommandcontainedinPSI5orPCCCH.Themobile
stationwillreportmeasurementswiththisperiodicity.
StartEventN/A
StopEventN/A
ExpiryEventN/A
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6.4.26 T3184CategoryFixedallocationpacketuplinkack/nacktolerancetimer
StartEventReceiptofpacketuplinkack/nack.
StopEventReceiptofthenextpacketuplinkack/nack.
ExpiryEventMobilestationreleasestheTBFandradioresources.
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6.4.27 T3191CategoryResponsetofinaldatablocktolerancetimer
StartEventTransmissionofthefinalRLCdatablockinadownlinkTBF
StopEventReceipt
of
packet
downlink
ack/nack
or
packet
control
ack
ExpiryEventTFIandotherresourcesarereleased.
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6.4.28 T3193CategoryUplinkRLCreleasetimer.ThisisthenetworkcounterpartofT3192.This
timermustbelongerthanT3192.
StartEvent(SeeT3192)
StopEvent(SeeT3192)
ExpiryEvent(SeeT3192)
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6.4.29 T3195CategoryLinked
to
TBF
and
TFI
StartEventT3195startswhenN3105reachestomaximumvalue
StopEventN/A
ExpiryEventThenetworkreleasesTFIresource
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6.4.30 T3310CategoryAttachrequesttimer
StartEventWhenattachrequestissent.
StopEventAttach
accept
is
received.
ExpiryEventAttachrequestmessageisresent.
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6.4.31 T3312CategoryPeriodicroutingareaupdate
DetermineswhenthemobilestationGMMfunctionwillperforman
automaticRAupdate(irrespectiveofwhethertheRAhaschanged).
StartEventN/A
StopEventN/A
ExpiryEventN/A
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6.4.32 T3314CategoryReadytimer
Thistimerspecifiesthemaximumtimethatthemobilestationisallowedto
remaininGMMreadyconditionwithoutanLLCPDUtransferwiththeGPRS
subnetwork.
StartEventSendingofanLLCPDUtotheGPRSsubnetwork
StopEventSendingofanLLCPDUtotheGPRSsubnetwork
ExpiryEventMobilestationisforcedtoGMMstandby.
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6.4.33 T3321CategoryGPRSsubnetworkdetachtimer
StartEventSendingofdetachrequest
StopEventReception
of
detach
accept.
ExpiryEventMobilestationresendsthedetachrequest
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6.5 MISCELLANEOUS
6.5.1T3128CategoryThis timer is related with the access procedure of Uplink investigation
process.
StartEventThe
timer
starts
when
the
uplink
busy
message
is
sent
to
the
MS
upon
receivingaccessrequestforuplinkinvestigation.
StopEventThetimerisstoppedwhenUplinkfreemessageissenttotheMS.
ExpiryEventIncaseofanexpiryeventofthistimer,theUplink investigationprocess is
aborted.
Thedefaultvalueforthistimeris1second.
This is a MS based Timer and hence vendor implementation data is
unavailable.
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6.5.2T3210CategoryThistimerisrelatedwiththeaccessprocedureofLocationUpdate.
StartEventThetimerstartswhentheMSsendsthelocationupdaterequesttotheBSS
entity.
StopEventThetimer isstoppedwhentheLocation_update_acceptorrejectmessage
is received bythe MSentity.This timer isalso stopped in case of a lower
layerfailure.
ExpiryEventIncaseofanexpiryeventofthistimer,theBSStimerT3211isstarted.
Thedefaultvalueforthistimeris20seconds.
This is a MS based Timer and hence vendor implementation data is
unavailable.
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6.5.3T3211CategoryThis timer is related with the access procedure of location update
procedure.
StartEventThis timer starts when location_update_reject is received with the cause
valueindicatingnetworkfailure.
StopEventTheTimer isstoppedwhenthe locationupdatetakesplaceorcell forthe
particularMSischanged.
ExpiryEventIncasethistimerexpires,the request for location update isagainsentto
theBSSentity.
Thedefaultvalueforthistimeris15seconds.
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6.5.4T3212CategoryThistimerisrelatedwiththeterminationofMMsignaling.
StartEventThistimerstartswiththeterminationofMMsignaling.
StopEventThe
timer
stops
when
the
message
for
the
initiation
of
MM
signaling
is
sent
totheMSbytheBSSentity.
ExpiryEventIncasethetimerexpires,aperiodicrequestissentfortheLUupdate.
Thedefaultvalueforthistimeris60seconds.
This is a MS based Timer and hence vendor implementation data is
unavailable.
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6.5.5T3220CategoryThistimerisrelatedwiththeIMSIdetachprocedure.
StartEventThe timer starts when the MS sends an IMSI detach message to the BTS
entity.
StopEventThetimerisstoppedwhentheMSisremovedfromtheMMsublayer.
ExpiryEventIncasethetimerexpires,theMSenterstheNullperiodandrequestissent
forthestatustobeupdated.
Thedefaultvalueforthistimeris5seconds.
This is a MS based Timer and hence vendor implementation data is
unavailable.
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7.0 VENDORBASEDCOMPILEDLISTS7.1 MOTOROLATIMERS
TimersT_hand_rqd T3230
T_HAND_RQD T3240
T_SDCCH_HO_ALLOWED T4
t_stat_info T4(ITU)
T1 T4_TIMER
T1(ITU) T4_TIMER(Lbinterface)
T1_TIMER T4_TIMER_ID(Lbinterface)
T1_TIMER(Lbinterface) T5
T1_TIMER_ID(Lbinterface) T5(ITU)
T12 T5_TIMER
T12_TIMER T5_TIMER(Lbinterface)
T12_TIMER(Lb
interface)
T5_TIMER_ID
(Lb
interface)
T13 T6
T13_TIMER T6(ITU)
T13_TIMER(Lbinterface) T6_TIMER_ID(Lbinterface)
T14 T7
T14_TIMER T7(ITU)
T14_TIMER(Lbinterface) T7_EXPMSG_TYPE
T17 T7_TIMER_ID(Lbinterface)
T17_TIMER TCHassignmentsuccessful
T17_TIMER(Lbinterface) TCHassignmentunsuccessful
T2 TCONN_EST
T2(ITU) Tqho
T2_TIMER
TREL
T2_TIMER(Lbinterface) bssgp_t1_timer
T2_TIMER_ID(Lbinterface) bssgp_t2_timer
T22 bssgp_t5_timer
T22_TIMER bssmap_t1
T22_TIMER(Lbinterface) bssmap_t10
T23 bssmap_t11
T23_TIMER bssmap_t13
T23_TIMER(Lbinterface) bssmap_t19
T3 bssmap_t20
T3(ITU) bssmap_t4
T3_TIMER_ID(Lbinterface) bssmap_t7
T3101
bssmap_t8
T3103 bssmap_tqho
T3105 bounce_protect_cong_tmr
T3109 bounce_protect_qual_tmr
T3111 bts_p_con_timer
T3122 CLM_T1
T3210 CLM_T13
T3212 CLM_T19
T3220 CLM_T20
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TimerCLM_T4 rr_t3111
hop_count_timer rr_t3111_sd
lb_int_ss7_l2_t1 rr_t3111_tch
lb_int_ss7_l2_t2 rr_t3212
lb_int_ss7_l2_t3
RRSM_AUDIT_TIMER
lb_int_ss7_l2_t4 RRSM_T10
lb_int_ss7_l2_t5 RRSM_T11
lb_int_ss7_l2_t6 RRSM_T8
lb_int_ss7_l2_t7 ss7_l2_t1
lb_int_ss7_l3_t1 ss7_l2_t2lb_int_ss7_l3_t12 ss7_l2_t3
lb_int_ss7_l3_t13 ss7_l2_t4
lb_int_ss7_l3_t14 ss7_l2_t5
lb_int_ss7_l3_t17 ss7_l2_t6
lb_int_ss7_l3_t2 ss7_l2_t7
lb_int_ss7_l3_t22 ss7_l3_t1
lb_int_ss7_l3_t23 ss7_l3_t12
lb_int_ss7_l3_t4 ss7_l3_t13
lb_int_ss7_l3_t5 ss7_l3_t14
lb_int_ss7_slt_t1 ss7_l3_t17
notalignedtimer ss7_l3_t2
ns_alive_timer ss7_l3_t22
ns_block_timer ss7_l3_t23
ns_reset_period ss7_l3_t4
ns_reset_timer ss7_l3_t5
ns_test_timer waitforclearcommandfromtheBSSbasedSMLCtimer
penalty_time waitforSCCPreleasecompletetimer
PENALTY_TIME waitforSCCPreleasedmessagefromSMLCtimer
PERF_LOC_TIMER wait_for_reselection
rr_ny1_rep wait_indication_parameters
rr_t3101 waitingforchangebackacknowledgement(rstattempt)timer
rr_t3103 waitingforchangebackacknowledgement(secondattempt)timer
rr_t3105 waitingforchangeoveracknowledgementtimer
rr_t3109 waitingforforceuninhibittimer
to362,3210,3212,3214,310 waitingforinhibitionacknowledgementtimer
rr_t3110 add_access_class
rf_chan_rel_ack sccp_tconn_est
retry_cand_period radiochanrel
exrtrycandprd sccp_released
validcandperiod assign_successful
radio_link_timeout bsc_audit
link_fail
bsc_audit_response
linkabouttofail clear_command
channel_act clear_cmd_ext_ho
channel_teardown circuit_reset_ack
cipher_comp_ms ciphering_successful
ho_complete ext_ho_allocation
mode_modify ho_allocation
modeRRModifyAck ho_request
register_exp ho_successful
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7.2 ALCATELTIMERSTimer Entity Timer Entity
T(connest) BSC T_GSL_ACK(BSC) BSC
T(iar) BSC T_HO_REQD_LOST BSC
T(sst)
BSC
T_INHIBIT_CPT
BSC
T_ALLOC_BTS BSC T_LB_OV BSC
T_AVG_T(MFS) MFS T_LCS_RESTART(BSC) BSC
T_BA_CHANGE MFS T_Location BSC
T_BTS_RLS_CNF BSC T_MAX_FOR_MS_SYNCHRO MFS
T_CBC_READY BSC T_MAX_STREAMING_BUFFERING MFS
T(ias) BSC T_MS_CELL_REJ BSC
T_ACK_WAIT MFS T_NC_PING_PONG MFS
T_AUTOCLEANING_MEAS_REP BSC T_NC2_LOAD_RANKING MFS
T_AVG_W(BSC) BSC T_One_Block MFS
T_BIND_CNF BSC T_COUNT_I BSC
T_BURST BSC T_DELAY_GSL BSC
T_CFI_TR BTS T_DELAYED_DL_TBF_POL_INITIAL MFS
T(rel) BSC T_dl_assign_ccch MFS
T_ACK_WAIT_DRX_PCCCH MFS T_DSP_LOAD_REPORT MFS
T_AVG_T(BSC) BSC T_EXTENDED_UL_TBF_POL MFS
T_AVG_W(MFS) MFS T_flow_ctrl_cell MFS
T_BTS_EST_CNF BSC T_GCH_INACTIVITY_LAST MFS
T_CANDIDATE_TBF_REALLOC MFS T_GSL_ACK(MFS) MFS
T_CHANGE_RLC_MODE MFS T_i BSC
T_CONFIG_TBF MFS T_INITIAL_PDCH MFS
T_DELAY BSC T_LCS_Delay_Tolerant MFS
T_DELAY_PAGING_EXT MFS T_LCS_RESTART(MFS) MFS
T_Delayed_DL_TBF_Pol_UL MFS T_Location_Longer BSC
T_DL_EGPRS_MeasReport MFS T_MAX_FOR_TBF_SCHEDULING MFS
T_DTM_ASSIGN
MFS
T_MIN_POLL
MFS
T_FAST_DL_margin MFS T_MS_CONTEXT_FLUSH_PERSISTENCE MFS
T_flow_ctrl_ms MFS T_NC_REJ_CELL MFS
T_GPRS_Resume BSC T_NETWORK_RESPONSE_TIME MFS
T_HCP BSC T_OVL_MSC BSC
T_IA BSC T_PAG_CS(BSC) BSC
T_INTRF_L3 BSC T_PAG_PS(MFS) MFS
T_LCS_Low_Delay MFS T_PDA BSC
T_Loc_abort BSC T_PUA BSC
T_MAX_EXTENDED_UL MFS T_RECOVERY BSC
T_MAX_RETRANS_DL MFS T_REPETITION_UPLINK_FREE BSC
T_MPDCH_EST_PROC(BSC) BSC T_RESET_COUNTER BTS
T_MS_Context_Lifetime
MFS
T_RMS_BSC_RESTART
BSC
T_NC_RXQUAL_VALID MFS T_RRLP_Low_Delay MFS
T_NOTIF_RESPONSE_DELAY BSC T_SHARED_DTM_INFO(BSC) BSC
T_CONNECT BSC T_SMSCB_RESP BSC
T_delay_gch MFS T_SYNC BTS
T_DELAYED_DL_TBF_POL MFS T_ta BTS
T_DELAYED_FINAL_PUAN MFS T_TFO BSC
T_DL_GPRS_MeasReport MFS T_ul_assign_pccch MFS
T_DYN_SDCCH_HOLD BSC T_WAIT_CS_PROC MFS
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Timer Entity Timer EntityT_FILTER BSC T_WAIT_PMR_MARGIN MFS
T_GCH_INACTIVITY MFS T1_0858 BSC
T11 BSC T3168(BSC) BSC
T_PAG_CS(MFS) MFS T3180 MFS
T_PAGING_EXT
MFS
T3191
MFS
T_PSCD_SCHEDULE_ACK MFS T3208n MFS
T_qho BSC T391 MFS
T_release TC T7 BSC
T_REROUTING_REQUEST_GUARD MFS T17 BSC
T_RMS_BSC BSC T19 BSC
T_RMS_BTS BSC T200(BSC) BSC
T_SAGI_GUARD MFS T200_GSL(BSC) BSC
T_SHARED_DTM_INFO(MFS) MFS T200_S3 BTS
T_STOP_FR_EMISSION MFS T200_TF BTS
T_SYNCd BTS T203(BSC) BSC
T_TBF_ACTIV MFS T203_GSL(MFS) MFS
T_ul_access_max MFS T3105_D BSC
T_UL_CONGESTION MFS T3105_F_HR BSC
T_WAIT_DTM MFS T3106_D_STOP BSC
T_WAIT_UPLINK_ACCESS BSC T3107 BSC
T1_long BSC T3115 BSC
T11_FORCED BSC T3148n BSC
T_PAG_PS(BSC) BSC T3168(MFS) MFS
T_PAGING_REORG MFS T3182n MFS
T_PSI_PACCH MFS T3192(BSC) BSC
T_RCR_ACK BSC T3212(BSC) BSC
T_REPETITION_CHANNEL_RELEASE BSC T4 BSC
T_RESEL MFS T8 BSC
T_RMS_BSC_RECONF BSC T18 BSC
T_RRLP_Delay_Tolerant MFS T2_0858 BSC
T_SDCCH_PC BSC T200_D BTS
T_SMSCB_READY BTS T200_GSL(MFS) MFS
T_SUP BTS T200_SD BTS
T_SYNCu BTS T200_TH BTS
T_TBF_BCK_REL MFS T203(BTS) BTS
T_ul_assign_ccch MFS T3101 BSC
T_USF_Scheduling_AGCH MFS T3105_D_STOP BSC
T_WAIT_FLUSH MFS T3105_F_STOP BSC
T_WAIT_UPLINK_REQUEST_ACK BSC T3106_F BSC
T1_short BSC T3109 BSC
T13 BSC T3121 BSC
T14
BSC
T3166n
MFS
T18_Overload BSC T3169 MFS
T20 BSC T3190n MFS
T200_D3 BTS T3192(MFS) MFS
T200_OMU BTS T3212(MFS) MFS
T200_ST BTS T5_RA_CAP_UPDATE MFS
T200_TRE BTS T9101 BSC
T203_GSL(BSC) BSC T9103 BSC
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Timer Entity Timer EntityT3103 BSC T9108 BSC
T3105_F_FR BSC T9113 BSC
T3106_D BSC T9104 BSC
T3106_F_STOP BSC T9110 BSC
T3111 BSC T9105 BSC
T3122
BSC
T9112
BSC
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7.3 HUAWEITIMERSTimers
T200SDCCHSAPI3(5ms) PBGTValidTime(s)
T200SACCHSDCCH(10ms) PBGTWatchTime(s)
T200
SACCH
TCH
SAPI3(10ms)
Layer
HO
Valid
Time(s)
T200SACCHTCHSAPI0(10ms) LayerHOWatchTime(s)
T200FACCH/H(5ms) EdgeHOAdjCellValidTime(s)
T200FACCH/F(5ms) EdgeHOAdjCellWatchTime(s)
T200SDCCH(5ms) EdgeHOValidTime(s)
AHRRadioLinkTimeout(SACCHperiod(480ms)) EdgeHOWatchTime(s)
AFRRadioLinkTimeout(SACCHperiod(480ms)) UpdatePeriodofCHRecord(min)
AHRSACCHMultiFrames(SACCHperiod(480ms)) TCHMinimumRecoveryTime(s)
AFRSACCHMultiFrames(SACCHperiod(480ms)) ReleaseDelayofDownlinkTBF(ms)
SACCHMultiFrames(SACCHperiod(480ms)) InactivePeriodofExtendedUplinkTBF(ms)
TDD3GBetterCellHOValidTime(s) ReleaseDelayofNonextendedUplinkTBF(ms)
TDD3GBetterCellHOWatchTime(s) CellReselectInterval(s)
QuickHandoverPunishTime(s) CellPenaltyLastTime(s)
QuickHandoverLastTime(0.5s) CellReselectionForbiddenTime
QuickHandoverStaticTime(0.5s) NonDRXPeriod
NumberofSatisfactoryMeasurements(s) GPRSPenaltyTime
TotalNumberofMeasurements(s) ExtensionMRPeriod
InterULAndOLSubcellsHOPenaltyTime(s) Max.DurationofDRX(s)
OLSubcellLoadDiversityHOPeriod(s) T3192
ModifiedStepLengthofULLoadHOPeriod(s) T3168
ULSubcellLoadHierarchicalHOPeriod(s) CellReselectionMRPeriodinPacketTransferMode
3GBetterCellHOValidTime(s) CellReselectionMRPeriodinPacketIdleMode
3GBetterCellHOWatchTime(s) TimerforULDataForward(ms)
PenaltyTimeafterOtoUHOFail(s) WaitforRelIndAMRHR
PenaltyTimeafterUtoOHOFail(s) WaitforRelIndAMRFR
PenaltyTime
of
UtoO
HO(s)
T3103C(ms)
UnderlayHOStepPeriod(s) T3122(s)
UOHOValidTime(s) TREESTABLISH(ms)
UOHOWatchTime(s) T3111(ms)
PenaltyonMSFastMovingHO T3109(ms)
CfgPenaltyTimer T8(ms)
UmPenaltyTimer T3121(ms)
RscPenaltyTimer T3107(ms)
PenaltyTimeafterAMRTCHFHHOFail(s) T7(ms)
PenaltyTimeafterTAHO(s) T3103A(ms)
PenaltyTimeafterBQHO(s) ImmAssAInterfCreationTimer(ms)
MinIntervalforConsecutiveHOs T3101(ms)