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1、SIGTRANObjectivesOncompletionofthismodulethestudentwillbeableto:ExplainthebenefitofusingSIGTRANintermsofsignallingnetworkplanning,andsignallingnetworkcapacityDrawSIGTRANprotocolstacksandexplaintheroleofeachlayerOutlinetheproceduresforcreationofSIGTRANsi
2、gnallingdefinitionsinDX200MonitorandexplainSIGTRANmessagesfromEtherealorothersignallingmonitoringtoolSIGTRANProtocolstackoptionsqchang:hUseofSIGTRANSCTPFunctionsAssociationStart-upandTakedownSequencedDeliverywithinStreamsUserDataFragmentationAcknowledge
3、mentandCongestionAvoidanceChunkBundlingPacketValidationASP-SGcommunicationIPSP-IPSPcommunicationSCTPmessagestructureSCTPnormalassociationestablishmentINITINITACKCOOKIEECHOEstablishmentSCTPSCTPCOOKIEACKDATASACKSCTPassociationterminationSHUTDOWNSHUTDOWNAC
4、KSHUTDOWNCOMPLETEGracefulterminationoftheassociationSCTPSCTPABORTAbortoftheassociationSCTPDATAchunkformat01234567012345670123456701234567Type=0ReservedUBELengthTSNStreamIdentifierSStreamSequenceNumbernPayloadProtocolIdentifierUserData(seqnofstreamS)Ufla
5、g–Unordered.StreamSequenceNumberisnotusedB/Eflags–indicateifthischunkisthebeginning/middle/endornotfragmentedchunkofuserdataSCTPSACKchunkformat01234567012345670123456701234567Type=3LengthCumulativeTSNAckDuplicateTSN1ChunkFlagsAdvertisedReceiverWindowCre
6、dita_rwndNumberofGapAckBlocksNNumberofDuplicatedTSNsXGapAckBlock#1startGapAckBlock#1endGapAckBlock#NstartGapAckBlock#NendDuplicateTSNNSCTPdatatransferDATA(TSN=7,STRM=0,SEQ=3)ErrorfreeoperationErrorrecoverySCTPSCTPDATA(TSN=8,SRTM=0,SEQ=4)SACK(TSNACK=8,Bl
7、ock=0)Free7,8Free9DATA(TSN=9,STRM=0,SEQ=5)DATA(TSN=10,STRM=0,SEQ=6)DATA(TSN=11,STRM=0,SEQ=7)SACK(TSNACK=9,Block=1,Strl=5,End=5)SigtranTermsandConceptsDX200AssociationSet(upto16associations)SCTPAssociationSignalingLinkSetcanonlycontainone"Sigtranlink"."S
8、igtranlink"consistsofoneSCTPassociationset.SignallingpointBIPSignallingpointAMSC(Server)HLR(Client)CCSU_0CCSU_1CCSU_2CMSPC_1CCSU_0CCSU_1CCSU_2CMIPAddressesSPC_2Associationisidentifiedbythecomputerunitand destinationaddress.Onlyon
