1、附着信令流程 Attach 附着信令流程（统计时延：红色的为开始和结束信令）Attach requestUnknown(0x0734)（未知的）rrcConnectionRequestrrcConnectionSetuprrcConnectionSetupCompleterrcConnectionReconfiguration(测量配置)dlInformationTransfer(信息传递)rrcConnectionReconfigurationCompleteSecurity(安全) protected (受保护)NAS messageAuthentication(鉴定和证明) requestAuthentication response（回复相应）Unknown(0x077B)ulInformationTransfer（转移，调任）dlInformationTransferSecurity(网络安全技术协议) protected （保护什么安全）NAS messageSecurity mode(方式，风格) command（命令指挥）Security mode completeUnknown(0x0790)ulInformationTransfer（转移）ueCapabilityEnquiry（询问能力）ueCapabilityInformation（通知能力）securityModeCommandrrcConnectionReconfiguration（重新配置）rrcConnectionReconfigurationComplete（完整的，圆满地）Security protected NAS messageAttach （附着）acceptActivate 激活 default默认 EPS bearer 搬运 context背景 requestActivate default EPS bearer context accept（接受）Attach completeUnknown(0x072D)ulInformationTransferrrcConnectionReconfigurationrrcConnectionReconfigurationComplete Detach 去附着信令流程（统计时延：红色的为开始和结束信令）Detach requestUnknown(0x0734)ulInformationTransferdlInformationTransferSecurity protected NAS messageDetach acceptrrcConnectionRelease(释放)PDN connectivity (联接能力)request2、呼叫业务信令流程 UE 主叫信令流程（统计时延：红色的为开始和结束信令）Extended(扩展,扩大) service requestrrcConnectionRequestrrcConnectionSetuprrcConnectionSetupCompleterrcConnectionReconfiguration(重新配置)rrcConnectionReconfigurationCompletesecurityModeCommandrrcConnectionReconfigurationrrcConnectionReconfigurationCompleterrcConnectionReconfigurationrrcConnectionReconfigurationCompleterrcConnectionRelease UE 被叫信令流程（统计时延：红色的为开始和结束信令）（不含鉴权信令流程）systemInformationBlock（阻止）Type（类型）1systemInformationBlockType1Paging（分页，寻呼）Extended （延伸的）service requestrrcConnectionRequestrrcConnectionSetuprrcConnectionSetupCompleterrcConnectionReconfigurationrrcConnectionReconfigurationCompletesecurityModeCommandrrcConnectionReconfigurationrrcConnectionReconfiguration（重新配置）CompleterrcConnectionReconfigurationrrcConnectionReconfigurationComplete（含鉴权信令流程）systemInformationBlockType1PagingExtended service requestrrcConnectionRequestrrcConnectionSetuprrcConnectionSetupCompleterrcConnectionReconfigurationrrcConnectionReconfigurationCompletedlInformationTransferSecurity protected NAS messageAuthentication（身份验证） requestAuthentication response（响应）Unknown(0x077B)ulInformationTransferdlInformationTransferSecurity protected NAS messageSecurity mode commandSecurity mode completeUnknown(0x0790)ulInformationTransfersecurityModeCommandrrcConnectionReconfigurationrrcConnectionReconfigurationCompleterrcConnectionReconfigurationrrcConnectionReconfigurationComplete3、重选与切换信令流程（重要） 小区重选信令流程systemInformationBlock（切断阻止）Type1systemInformationsystemInformationBlockType1systemInformationBlockType1systemInformationsystemInformationBlockType1systemInformationBlockType1systemInformationBlockType1 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）Measurement（测量）Report（报告）rrcConnectionReconfiguration（重新配子）rrcConnectionReconfigurationCompleterrcConnectionReconfigurationrrcConnectionReconfigurationCompletesystemInformationBlockType1systemInformationBlockType1systemInformationBlockType1systemInformationBlockType1systemInformation 基站间同频切换信令流程（统计时延：红色的为开始和结束信令）measurementReportrrcConnectionReconfigurationrrcConnectionReconfigurationCompletesystemInformationBlockType1rrcConnectionReconfigurationrrcConnectionReconfigurationComplete4、跟踪区域更新信令流程 新小区所属跟踪区域不在终端跟踪区域列表中信令流程 周期性跟踪区域更新信令流程Reestablish(恢复重建)attempt 企图 reject 拒绝驳回tracking area update 简称 TAU(不是很懂)当手机在 GPRS 网络或 E-UTRAN 网络中完成附着后，如果出现如下情况，会触发Tracking Area Update 过程。- 手机发现进入到了一个新的 TA，并且这 TA 不在 TAIs 列表中。- 到了 TA 更新的周期- 当手机从 UTRAN 通过重选进入 E-UTRAN 时期状态为 PMM_Connected。- 手机重选 E-UTRAN 时，其状态为 GPRS READY- 手机重选到 E-UTRAN 时 TIN 为P-TMSI- RRC 连接释放时，释放原因 load re-balancing TAU required- 手机的 RRC 层通知 UE 的 NAS 层，RRC 连接失败- 手机如下参数发生变化：UE Network CapabilityMS Network CapabilityUE Specific DRX ParametersMS Radio Access capability- 对于有 SR-VCC 的手机， MS Classmark 2，MS Classmark 3 或 Supported Codecs参数发生了变化。Tracking Area Update 根据不同的情况也有几种不同的流程与其对应这里先整理出第一种Tracking Area Update procedure with Serving GW change