LTE信令分析一、概述：本文信令内容为2011年6月杭州LTE实验网期间，采用NSN的网络设备，数据卡终端为创毅，测试软件使用CDS吐出的信令内容。
由于试验网期间网络、终端、测试软件都没有完全成熟，所以信令内容只局限于现有试验网阶段。
以下是终端空闲态、RRC连接态做业务涉及到的所有信令内容。
从消息看主要是无线资源控制层RRC消息和非接入层NAS消息。
NAS高层消息不再多做描述，主要对RRC层消息做简单介绍。
RRC: RRCConnectionRequestRRC: RRCConnectionSetupNAS: Attach RequestNAS: Authentication RequestNAS: Authentication ResponseNAS: Security Mode CommandNAS: Security Mode CompleteRRC: UECapabilityEnquiryRRC: UECapabilityInformationNAS: Attach AcceptRRC: RRCConnectReconfigurationCompleteNAS: Attach CompleteRRC: RRCConnectionReleaseRRC: MasterInformationBlockRRC: PagingRRC: MeasurementReport二、信令流程1.切换流程：待补充2.重选信令流程重选过程是RRC空闲状态下的流程，只有2条信令：RRC: RRCConnectionRequest、RRC: MasterInformationBlock。
如下图所示：3.FTP信令流程：待补充三、详细信令1.RRC层信令内容业务和功能广播和 NAS 相关的系统消息广播和 AS 相关的系统消息寻呼建立、维护和释放终端和 E-UTRAN 之间的RRC 链接包括分配临时的终端标识，配置信令承载安全功能包括密钥的管理建立、维护和释放点对点的无线承载移动性管理功能，包括测量控制和上报、切换、小区选择和重选、切换时 RRC 上下文传递广播 MBMS 业务建立、维护和释放 MBMS 无线承载QoS 管理功能终端测量控制和上报上下行透明传递 NAS 消息1)RRC: RRCConnectionRequestMessage type: CCCH_ULDirection: UplinkComputer Timestamp: 14:57:41.890uL-CCCH-Messagemessagec1rrcConnectionRequestcriticalExtensionsrrcConnectionRequest-r8ue- IdentityrandomValue: 1101110111011101110111011101110111011101establishmentCause : mo-Signallingspare : 05D DD DD DD DD D6主要内容：终端身份、建立原因。
2)RRC: RRCConnectionSetupMessage type: CCCH_DLDirection: DownlinkComputer Timestamp: 14:57:41.937dL-CCCH-Messagemessagec1rrcConnectionSetuprrc-TransactionIdentifier : 2criticalExtensionsc1rrcConnectionSetup-r8radioResourceConfigDedicatedsrb-ToAddModListSRB-ToAddModsrb-Identity : 1rlc-ConfigexplicitValueamul-AM-RLCt-PollRetransmit : ms100pollPDU : pInfinitypollByte : kBinfinitymaxRetxThreshold : t16dl-AM-RLCt- Reordering : ms50t- StatusProhibit : ms0 logicalChannelConfig : defaultValuemac-MainConfigexplicitValueul-SCH-ConfigmaxHARQ-Tx : n4 periodicBSR -Timer : infinity retxBSR-Timer : sf2560 ttiBundling : false timeAlignmentTimerDedicated : sf10240 physicalConfigDedicated pdsch -ConfigDedicated p-a : dB0 pusch -ConfigDedicated betaOffset-ACK-Index : 10 betaOffset-RI-Index : 3 betaOffset-CQI-Index : 8 uplink PowerControl Dedicated p0-UE-PUSCH : 2 deltaMCS-Enabled : en0 accumulationEnabled : true p0-UE-PUCCH : 2 pSRS-Offset : 7 filterCoefficient : fc4 cqi-Report Config cqi-ReportModeAperiodic : rm30 nomPDSCH-RS-EPRE-Offset : 0 cqi-ReportPeriodic setup cqi-PUCCH-ResourceIndex : 4 cqi-pmi-ConfigIndex : 8 cqi-FormatIndicatorPeriodic : widebandCQI simultaneousAckNackAndCQI : false soundingRS -UL-ConfigDedicated setup srs-Bandwidth : bw0 srs-HoppingBandwidth : hbw0 freqDomainPosition : 0 duration : true srs-ConfigIndex : 21 transmissionComb : 1 cyclicShift : cs4 antenna Info explicitValue transmissionMode : tm2 ue-TransmitAntennaSelection : release schedulingRequestConfigsetupsr-PUCCH-ResourceIndex : 32sr-ConfigIndex : 13dsr-TransMax : n6470 12 98 13 FD 94 04 99 F3 659F 28 E1 4D 3E CC 01 00 82 0082 B8 14 10 06 C0主要内容：RLC层、MAC层、PHY层各种参数配置。
3)RRC: UECapabilityEnquiryMessage type: DCCH_DLDirection: DownlinkComputer Timestamp: 14:57:42.296dL-DCCH-Messagemessagec1ueCapabilityEnquiryrrc-TransactionIdentifier : 2criticalExtensionsc1ueCapabilityEnquiry-r8ue-CapabilityRequest : eutra主要内容：UE能力询问4)RRC: UECapabilityInformationMessage type: DCCH_ULDirection: UplinkComputer Timestamp: 14:57:42.296uL-DCCH-Messagemessagec1ueCapabilityInformationrrc-TransactionIdentifier : 2criticalExtensionsc1ueCapabilityInformation-r8ue-CapabilityRAT-ContainerListUE-CapabilityRAT-Containe rrat-Type : eutraueCapabilityRAT-Container : 81000019d2810381d183********3C 01 00 E8 10 00 01 9D 28 1038 1D 18 34 42 00 00 00主要内容：UE能力5)RRC: RRCConnectionReconfigurationMessage type: DCCH_DLDirection: DownlinkComputer Timestamp: 15:20:36.000dL-DCCH-Messagemessagec1rrcConnectionReconfigurationrrc-TransactionIdentifier : 1criticalExtensionsc1rrcConnectionReconfiguration-r8measConfigmeasObjectToAddModListMeasObjectToAddModmeasObjectId : 1measObjectmeasObjectEUTRAcarrierFreq : 38050allowedMeasBandwidth : mbw100presenceAntennaPort1 : trueneighCellConfig : 00offsetFreq : dB0 reportConfigToAddModListReportConfigToAddModreportConfigId : 1reportConfigreportConfigEUTRAtriggerTypeeventeventIdeventA3a3-Offset : 4reportOnLeave : falsehysteresis : 0timeToTrigger : ms320triggerQuantity : rsrpreportQuantity : sameAsTriggerQuantitymaxReportCells : 8reportInterval : ms1024reportAmount : infinityReportConfigToAddModreportConfigId : 2reportConfigreportConfigEUTRAtriggerTypeeventeventIdeventA5a5-Threshold1threshold-RSRP : 60a5-Threshold2threshold-RSRP : 62hysteresis : 0timeToTrigger : ms480triggerQuantity : rsrpreportQuantity : sameAsTriggerQuantitymaxReportCells : 8reportInterval : ms240reportAmount : infinityReportConfigToAddModreportConfigId : 3reportConfigreportConfigEUTRAtriggerTypeeventeventIdeventA2a2-Thresholdthreshold-RSRP : 1hysteresis : 0timeToTrigger : ms256triggerQuantity : rsrpreportQuantity : sameAsTriggerQuantitymaxReportCells : 8reportInterval : min60reportAmount : r1measIdToAddModListMeasIdToAddModmeasId : 1measObjectId : 1reportConfigId : 1MeasIdToAddModmeasId : 2measObjectId : 1reportConfigId : 2MeasIdToAddModmeasId : 4measObjectId : 1reportConfigId : 3quantityConfigquantityConfigEUTRAfilterCoefficientRSRP : fc4filterCoefficientRSRQ : fc4 measGapConfig : releases-Measure : 90speedStateParssetupmobilityStateParameterst-Evaluation : s180t-HystNormal : s180n-CellChangeMedium : 8n-CellChangeHigh : 8timeToTrigger-SFsf-Medium : oDot5sf-High : oDot5 radioResourceConfigDedicatedsrb-ToAddModListSRB-ToAddModsrb-Identity : 2rlc-ConfigexplicitValueam ul-AM-RLC t-PollRetransmit : ms100 pollPDU : pInfinity pollByte : kBinfinity maxRetxThreshold : t16 dl-AM-RLC t-Reordering : ms50 t-StatusProhibit : ms0 logicalChannelConfig : defaultValue drb-ToAddModList DRB-ToAddMod eps-BearerIdentity : 5 drb-Identity : 4 pdcp-Config discardTimer : ms300 rlc-AM statusReportRequired : true headerCompression : notUsed rlc-Config am ul-AM-RLC t-PollRetransmit : ms250 pollPDU : p16 pollByte : kB25 maxRetxThreshold : t16 dl-AM-RLC t-Reordering : ms50 t-StatusProhibit : ms50 logicalChannelIdentity : 4 logicalChannelConfig ul-SpecificParameters priority : 10 prioritisedBitRate : kBps16 bucketSizeDuration : ms100 logicalChannelGroup : 2 mac-MainConfig explicitValue ul-SCH-Config periodicBSR-Timer : sf10 retxBSR-Timer : sf320 ttiBundling : false timeAlignmentTimerDedicated : sf10240 phr-ConfigsetupperiodicPHR-Timer : sf200prohibitPHR-Timer : sf100dl-PathlossChange : dB6physicalConfigDedicatedcqi-ReportConfigcqi-ReportModeAperiodic : rm30nomPDSCH-RS-EPRE-Offset : 0cqi-ReportPeriodicsetupcqi-PUCCH-ResourceIndex : 3cqi-pmi-ConfigIndex : 9cqi-FormatIndicatorPeriodic :simultaneousAckNackAndCQI : truesoundingRS-UL-ConfigDedicatedsetupsrs-Bandwidth : bw0srs-HoppingBandwidth : hbw0freqDomainPosition : 0duration : truesrs-ConfigIndex : 15transmissionComb : 1cyclicShift : cs7antennaInfoexplicitValuetransmissionMode : tm2ue-TransmitAntennaSelection : release6)RRC: RRCConnectReconfigurationCompleteMessage type: DCCH_ULDirection: UplinkComputer Timestamp: 14:57:42.406uL-DCCH-Messagemessagec1rrcConnectionReconfigurationCompleterrc-TransactionIdentifier : 1criticalExtensions : rrcConnectionReconfigurationComplete-r812 00主要内容：RRC重配消息确认。