- 1、本文档共21页,可阅读全部内容。
- 2、原创力文档(book118)网站文档一经付费(服务费),不意味着购买了该文档的版权,仅供个人/单位学习、研究之用,不得用于商业用途,未经授权,严禁复制、发行、汇编、翻译或者网络传播等,侵权必究。
- 3、本站所有内容均由合作方或网友上传,本站不对文档的完整性、权威性及其观点立场正确性做任何保证或承诺!文档内容仅供研究参考,付费前请自行鉴别。如您付费,意味着您自己接受本站规则且自行承担风险,本站不退款、不进行额外附加服务;查看《如何避免下载的几个坑》。如果您已付费下载过本站文档,您可以点击 这里二次下载。
- 4、如文档侵犯商业秘密、侵犯著作权、侵犯人身权等,请点击“版权申诉”(推荐),也可以打举报电话:400-050-0827(电话支持时间:9:00-18:30)。
SignalProcess
CallProcess(innetwork)
Roaming(locationupdate)BaseTransceiverStation(BTS)BaseStationController(BSC)MSVisitorLocationRegister(VLR)HomeLocationRegister(HLR)MobileSwitchingCentre(MSC)PublicSwitchedTelephoneNetwork(PSTN)Iamnewinthisarea(TMSIandoldLAI)MSdetected(TMSIandoldLAI)MSdetected(TMSI)OK(IMSI)OKWelcome(newTMSIandnewLAI)VisitorLocationRegister(VLR)YourMSisinmyareaOK,hereisthesubscriberdataVLRorHLRstoresMSRN(MSRoamingNo.)VLRstoresLAI(LocationAreaIdentity)HLRstoresVLRforMSVLRstoressubscriberdata)))(((
IncomingcallBaseTransceiverStation(BTS)BaseStationController(BSC)MSMobileSwitchingCentre(MSC)PSTNVisitorLocationRegister(VLR)GatewayMSC(GMSC)PSTNHomeLocationRegister(HLR)PagingTMSICallforMSRNCallforMSRNCallforMSISDNWhereisMSISDN?GetmeMSRNforMSISDNMSRNMSRNCanIuseacontrolchannel?UsethiscontrolchannelUsethistrafficchannelAnswerAnswer)))(((
OutgoingcallfromMSBaseTransceiverStation(BTS)BaseStationController(BSC)MSMobileSwitchingCentre(MSC)PublicSwitchedTelephoneNetwork(PSTN)VisitorLocationRegister(VLR)CanImakeacall?OK,usethiscontrolchannelIneedservicexx(incl.tel.no.)(TMSI)CanMSuseservicexx?YesOK,andhereisatrafficchannelFirstaddressmessage)))(((
Inter-MSChandoverBTSAMSBSCAMSCAVLRAPSTNBTSBBSCBMSCBVLRBBTSBisbetterHandoverrequiredHandoverrequiredHandoverrequiredOK(radiochannel)MSRN?MSRNOK(MSRNandradiochannel)AllocationoftrafficchannelHandover(radiochannel)OK)))((()))(((
UseofChannel(inUm)
Useofchannels-roamingBaseTransceiverStation(BTS)MSBCCH(LAI)RACH(canIgetacontrolchannel?)AGCH(usethisSDCCH)SDCCH(roaming;oldLAIandTMSI)SDCCH(newLAIandnewTMSI))))(((
Useofchannels-outgoingcallBaseTransceiverStation(BTS)MSRACH(canIgetacontrolchannel?)AGCH(usethisSDCCH)SDCCH(servicerequest)SDCCH(OK))))(((SDCCH(calledno.)
Useofchannels-incomingcallBaseTransceiverStation(BTS)MSPCH(paging)RACH(canIgeta
文档评论(0)