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ID:33520343
大小:2.12 MB
页数:52页
时间:2019-02-24
《【7A文】无线接口信令协议.ppt》由会员上传分享,免费在线阅读,更多相关内容在工程资料-天天文库。
1、1上海大唐移动通信设备有限公司2003.12GSM移动通信系统原理培训讲义无线接口信令协议2Um接口信令3GSM系统专用协议群DTAPDTAPDirectTransferApplicationPartBSSMAPBSSManagementApplicationPartCMCallManagementMMMobileManagementRRRadioResourceManagementSCCPSignallingConnectionControlPartMAPMobileApplicationPartTCAPTr
2、ansactionCapabilityApplicationPartISUPISDNUserPartMTPMessageTransferPartCMMMRRSig.layer2Layer1(air)Sig.layer2Sig.layer1MTPSCCPBSSMAPRR(CM+MM)MSBSCMTPMTPSCCPSCCPCMMMBSSMAPTCAPMAPISUPMSCSig.layer2Layer1(air)BTS(CM)(MM)(RR)(CM)(MM)(RR)(CM)(MM)(LAPDm)(LAPDm)(LAP
3、D)Sig.layer2Sig.layer1(LAPD)BTSMBTSMRR'BTSMBTSManagementUmInterfaceAbisInterfaceA-interfaceInter-MSCInterface4ChannelRequestEstablishmentCauseemergencycallCallre-establishLocationupdateAnswertopaging:sameaschannelneededinPagingNECI=0:MO&procedurebecompletewi
4、thSDCCHNECI=1:MOTCH/FProcedurebecompletewithSDCCHRandomReference立即指配流程MSBSSCHANNELREQUEST(1)IMMEDIATEASSIGNMENT(EXTENDED)ImmediateAssignmentL2PseudolengthProtocoldiscriminatorSkipindicationMessagetype----N(SD)forMSsidePagemodeChanneldescriptionRandomreferenc
5、eTimingadvanceMobileallocationStartingtimeIArestoctetsT3126MMRRCHANNELREQUEST(2~M+1)IMMEDIATEASSIGNMENTREJECTSABM(L3)(1)UA(L3)SABM(L3)(2~6)ProtocoldiscriminatorCallcontrol;callrelatedSSmessagesMobilitymanagementmessagesRadioresourcemanagementmessagesSkipindi
6、cationOtherthan0shouldbeignorePagemodeNormalpagingExtendedpagingPagingreorganizationSameasbeforeChanneldescriptionChanneltypeandTDMAoffsetSDCCH/8+SACCH/8+subchannelSDCCH/4+SACCH/4+subchannelTCH/F+ACCHTNTSCHoppingchannelsinglechannel:ARFCNRFhoppingchannel:HSN
7、+MAIORequestreferenceRandomAccessInformationT1’/T2/T3——>FNT1’=(FN/1326)mod32T2=(FN)mod26T3=(FN)mod51(FN)mod42432=51x((T3-T2)mod26)+T3+51x26xT1’MobileallocationIndexforCAStartingtimeT1’/T2/T3IArestoctetsMAIO+Mobileallocation(frequencyparametersbeforetime)Imme
8、diateAssignmentExtendedPagemodeChanneldescription1Randomreference1Timingadvance1Channeldescription2Requestreference2Timingadvance2MobileallocationStartingtimeIArestoctetsImmediateAssignmentRejec
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