1、LTE空口信令流程汇总LTE空口信令流程详解以及相关优化案例汇总1、附着信令流程1.1 、Attach附着信令流程(统计时延:红色的为开始和结束信令)EPS MMAttach requestEPS MMUnknown(0x0734)UL CCCHrrcConnectionRequestDL CCCHrrcConnectionSetupUL DCCHrrcConnectionSetupCompleteDL DCCHrrcConnectionReconfigurationDL DCCHdlInformationTransferUL DCCHrrcConnectionReconfigurationC
2、ompleteEPS MMSecurity protected NAS messageEPS MMAuthentication requestEPS MMAuthentication responseEPS MMUnknown(0x077B)UL DCCHulInformationTransferDL DCCHdlInformationTransferEPS MMSecurity protected NAS messageEPS MMSecurity mode commandEPS MMSecurity mode completeEPS MMUnknown(0x0790)UL DCCHulIn
3、formationTransferDL DCCHueCapabilityEnquiryUL DCCHueCapabilityInformationDL DCCHsecurityModeCommandDL DCCHrrcConnectionReconfigurationUL DCCHrrcConnectionReconfigurationCompleteEPS MMSecurity protected NAS messageEPS MMAttach acceptEPS SMActivate default EPS bearer context requestEPS SMActivate defa
4、ult EPS bearer context acceptEPS MMAttach completeEPS MMUnknown(0x072D)UL DCCHulInformationTransferDL DCCHrrcConnectionReconfigurationUL DCCHrrcConnectionReconfigurationComplete1.2、Detach去附着信令流程(统计时延:红色的为开始和结束信令)EPS MMDetach requestEPS MMUnknown(0x0734)UL DCCHulInformationTransferDL DCCHdlInformatio
5、nTransferEPS MMSecurity protected NAS messageEPS MMDetach acceptDL DCCHrrcConnectionReleaseEPS SMPDN connectivity request1.3、前台测试中 Detach & Attach信令流程2、呼叫业务信令流程2.1、UE主叫信令流程(统计时延:红色的为开始和结束信令)EPS MMExtended service requestUL CCCHrrcConnectionRequestDL CCCHrrcConnectionSetupUL DCCHrrcConnectionSetupCom
6、pleteDL DCCHrrcConnectionReconfigurationUL DCCHrrcConnectionReconfigurationCompleteDL DCCHsecurityModeCommandDL DCCHrrcConnectionReconfigurationUL DCCHrrcConnectionReconfigurationCompleteDL DCCHrrcConnectionReconfigurationUL DCCHrrcConnectionReconfigurationComplete2.2、UE被叫信令流程(统计时延:红色的为开始和结束信令)DL PC
7、CHPagingEPS MMExtended service requestUL CCCHrrcConnectionRequestDL CCCHrrcConnectionSetupUL DCCHrrcConnectionSetupCompleteDL DCCHrrcConnectionReconfigurationUL DCCHrrcConnectionReconfigurationCompleteDL DCCHsecurityModeCommandDL DCCHrrcConnectionReconfigurationUL DCCHrrcConnectionReconfigurationCom
8、pleteDL DCCHrrcConnectionReconfigurationUL DCCHrrcConnectionReconfigurationComplete2.3、前台测试中UE主叫、切换L3信令流程2.4、后台软件中掉线、接入、RRC连接的L3信令与对应的Event事件3、重选与切换信令流程3.1、小区重选信令流程DL BCCH:DL SCHsystemInformationBlockType1DL BCCH:DL SCHsystemInformationDL BCCH:DL SCHsystemInformationBlockType1DL BCCH:DL SCHsystemInf
9、ormationBlockType1DL BCCH:DL SCHsystemInformationDL BCCH:DL SCHsystemInformationBlockType1DL BCCH:DL SCHsystemInformationBlockType1DL BCCH:DL SCHsystemInformationBlockType13.2、基站内同频切换信令流程(统计时延:红色的为开始和结束信令)UL DCCHmeasurementReportDL DCCHrrcConnectionReconfigurationUL DCCHrrcConnectionReconfigurationC
10、ompleteDL DCCHrrcConnectionReconfigurationUL DCCHrrcConnectionReconfigurationCompleteDL BCCH:DL SCHsystemInformationBlockType1DL BCCH:DL SCHsystemInformationBlockType1DL BCCH:DL SCHsystemInformationBlockType1DL BCCH:DL SCHsystemInformationBlockType1DL BCCH:DL SCHsystemInformation3.3、基站间同频切换信令流程(统计时延
11、:红色的为开始和结束信令)UL DCCHmeasurementReportDL DCCHrrcConnectionReconfigurationUL DCCHrrcConnectionReconfigurationCompleteDL BCCH:DL SCHsystemInformationBlockType1DL DCCHrrcConnectionReconfigurationUL DCCHrrcConnectionReconfigurationComplete4、跟踪区域更新信令流程4.1、新小区所属跟踪区域不在终端跟踪区域列表中信令流程4.2、周期性跟踪区域更新信令流程4.2、ENODEB间同频切换及TAU更新流程4、主要系统消息详解4.1、MIB消息中可以获取的重要信息4.2、SIB 1消息中可以获取的重要信息4.3、SI 消息中可以获取的重要信息(SI消息主要包含SIB2、SIB3消息)4.3、切换MR消息中可以获取的重要信息(为切换提供判定依据)
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