gsm无线网络优化及详细信道解释

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1、GSM技术交流GSM无线网络优化2移动主叫（MO）过程BSSVMSCVLRVPLMNIAM（ISUP）SIFOCCompletecallUmABIAM:InitialaddressmessageISUP:ISDNuserpartSIFOC:Sendinformationforoutgoingcall参见GSM03.183MO信令流程MSVMSCVLRBSSCMservicereqCMservicereqProcessaccessreqAuthenticateAuthenticateAuthenticateAuthenticater

2、espAuthenticaterespAuthenticateackSetciphermodeStartcipheringCiphermodecmdProcessaccessreqackCiphermodecompCiphermodecompsetupSIFOCCompletecallAllocatechannelAssignmentcmdAssignmentcompAllocationcompleteCallproceedingIAMACMANMAlertConnectConnectack参见GSM03.184移动被叫（MT）过

3、程BSSVMSCVLRVPLMNIAM(ISUP)SIFICPage/ackCompletecallUmAB参见GSM03.18GMSCHLRIAM(ISUP)Sendrouteinginfo/ackProvideroamingnumber/ack5MT获取路由信息GMSCVMSCVLRHLRSRIIAMPRNPRNackSRIackIAMSRI:SendRouteingInformationPRN:ProvideRoamingNumberIAM:InitialAddressMessage参见GSM03.186江苏上海北京MSRN

4、路由接续的机理TMSCMSC/VLRTMSCGMSCIAMHLRMSC/VLRTMSCMSC/VLR0210216495SRIPRN“13901234567”021-649577006495xxxx6485xxxx021-64957700MSRNMSISDNMSRN64957700649577016495ABCD“13901234567”0123HLR号7GMSCVLRVMSCBSSMSIAMSIFICPageMSPagePageChanreqImmassPagerespMSconnestabProcessAccessreqSet

5、ciphermodeProcessAccessreqackStartcipheringCiphermodecmdCiphermodecmpCiphermodecmpCompletecallSetupCallconfAllocatechanAsscmdAsscmpAllocationcmpAllertingACMConnectANMConnectackCompletecallack移动被叫流程参见GSM03.188位置更新过程VLRHLRVLRBSSVMSCUmABnewoldLocuptcancellationIdinquirin

6、gLocationUpdate的起因：1）SIM卡第一次使用2）位置区发生变化3）周期位置更新4）IMSIattach/dettacheDDG参见GSM03.209位置更新流程(1)在同一MSC中的位置更新MSVMSCVLRBSSLocupdreqLocupdreqLocareaupdAuthenticateAuthenticateAuthenticateAuthenticaterespAuthenticaterespAuthenticateackSetciphermodeStartcipheringCiphermodecmdLo

7、cupdaccCiphermodecompCiphermodecompLocupdaccTMSIackTMSIreallocationcmp参见GSM03.2010位置更新流程(2)在同一VLR但不同MSC中的位置更新MSVMSCVLRBSSLocupdreqLocupdreqLocareaupdAuthenticateAuthenticateAuthenticateAuthenticaterespAuthenticaterespAuthenticateackSetciphermodeStartcipheringCiphermod

8、ecmdLocupdaccCiphermodecompCiphermodecompLocupdaccTMSIackTMSIreallocationcmpHLRLocupdreqLocupdack参见GSM03.2011位置更新流程(3)在新的VLR