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LTE信令分析

作者:高考题库网
来源:https://www.bjmy2z.cn/gaokao
2021-02-08 10:09
tags:

-

2021年2月8日发(作者:sunshine)


LTE


信令分析



一、



概述:





本文信令内容为

< br>2011



6


月杭州

< p>
LTE


实验网期间,采用


NSN

< br>的网络设备,数据卡终端


为创毅,测试软件使用


CDS< /p>


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。

< br>NAS


高层消息不再多做描述,主要对


RRC

< p>
层消息


做简单介绍。




RRC: RRCConnectionRequest


RRC: RRCConnectionSetup


NAS: Attach Request


NAS: Authentication Request


NAS: Authentication Response


NAS: Security Mode Command


NAS: Security Mode Complete


RRC: UECapabilityEnquiry


RRC: UECapabilityInformation


NAS: Attach Accept


RRC: RRCConnectReconfigurationComplete


NAS: Attach Complete


RRC: RRCConnectionRelease


RRC: MasterInformationBlock


RRC: Paging


RRC: 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

< p>
RRC


空闲状态下的流程,只有


2


条信令:


RRC:


RRCConnectionRe quest



RRC:


Master InformationBlock



如下图所示:

< p>





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: RRCConnectionRequest


Message type: CCCH_UL


Direction: Uplink


Computer Timestamp: 14:57:41.890


uL-CCCH-Message



message




c1





rrcConnectionRequest






criticalExtensions







rrcConnectionRequest-r8








ue- Identity









randomValue:


1101








establishmentCause


: mo- Signalling








spare : 0


5D DD DD DD DD D6


主要内容:终端身份、建立原因。





2)



RRC: RRCConnectionSetup


Message type: CCCH_DL


Direction: Downlink


Computer Timestamp: 14:57:41.937


dL-CCCH-Message



message




c1





rrcConnectionSetup






rrc-TransactionIdentifier : 2






criticalExtensions







c1








rrcConnectionSetup-r8









radioResourceConfigDedicated










srb-ToAddModList











SRB


-ToAddMod












srb-Identity : 1












rlc-Config













explicitValue














am















ul-AM-RLC
















t-PollRetransmit : ms100


RLC


控制参数:


pollPDU



t-PollRetransmit

















pollPDU : pInfinity


pollByte



maxRetxThreshol d


















pollByte : kBinfinity
















maxRetxThreshold : t16















dl-AM-RLC
















t- Reordering : ms50
















t- StatusProhibit : ms0












logicalChannelConfig : defaultValue










mac-MainConfig





























HARQ



重传、






MAC


层控制参数:


BSR


重发











定时器等。


















































































































































物理层控制参数:











PDSCH;










PUSCH:ACKRICQI












上行功控;











CQI


控制参数;











SRS


参数;












天线信息:


transmissio nMode



































































































































explicitValue




ul-SCH-Config





maxHARQ-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


PowerContr ol


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



schedulingRequestConfig

































70 12 98 13 FD 94 04 99 F3 65



9F 28 E1 4D 3E CC 01 00 82 00



82 B8 14 10 06 C0














setup



sr-PUCCH-ResourceIndex : 32



sr-ConfigIndex : 13



dsr-TransMax : n64


主要内容:


RLC


层、


MAC


层、


PHY


层各种参数配置。




3)



RRC: UECapabilityEnquiry


Message type: DCCH_DL


Direction: Downlink


Computer Timestamp: 14:57:42.296


dL-DCCH-Message



message




c1





ueCapabilityEnquiry






rrc-TransactionIdentifier : 2






criticalExtensions







c1








ueCapabilityEnquiry-r8









ue- CapabilityRequest


: eutra


主要 内容:


UE


能力询问







4)



RRC: UECapabilityInformation


Message type: DCCH_UL


Direction: Uplink


Computer Timestamp: 14:57:42.296


uL-DCCH-Message



message




c1





ueCapabilityInformation






rrc-TransactionIdentifier : 2






criticalExtensions







c1








ueCapabilityInformation-r8









ue- CapabilityRAT-ContainerList










UE- CapabilityRAT-Containe


r


















81000019d2810381d





3C 01 00 E8 10 00 01 9D 28 10



38 1D 18 34 42 00 00 00




rat-Type : eutra


ueCapabilityRAT-Container


:


主要内容:


UE


能力

< br>






5)



RRC: RRCConnectionReconfiguration


Message type: DCCH_DL


Direction: Downlink


Computer Timestamp: 15:20:36.000


dL-DCCH-Message



message




c1





rrcConnectionReconfiguration






rrc-TransactionIdentifier : 1






criticalExtensions







c1








rrcConnectionReconfiguration-r8









measConfig










measObjectToAddModList











MeasObjectToAddMod












measObjectId : 1












measObject


下发


UE


需测量的信息:














measObjectEUTRA


频点、















carrierFreq


: 38050


频点带宽















allowedMeasBandwidth


: mbw100



















presenceAntennaPort1 : true














neighCellConfig : 00














offsetFreq : dB0










reportConfigToAddModList











ReportConfigToAddMod












reportConfigId : 1












reportConfig













reportConfigEUTRA














triggerType















event
















eventId















































eventA3



a3-Offset : 4



reportOnLeave :



false






































sameAsTriggerQuantity










































































下发< /p>


UE


需要上报的











控制参数:












A3A2A5


事件参数,
































threshold-RSRP : 60





















threshold-RSRP : 62






































sameAsTriggerQuantity




























































































































hysteresis : 0







timeToTrigger : ms320





triggerQuantity : rsrp





reportQuantity





maxReportCells : 8





reportInterval : ms1024





reportAmount : infinity


ReportConfigToAddMod



reportConfigId : 2



reportConfig




reportConfigEUTRA





triggerType






event







eventId








eventA5









a5-Threshold1
















a5-Threshold2














hysteresis : 0







timeToTrigger : ms480





triggerQuantity : rsrp





reportQuantity





maxReportCells : 8





reportInterval : ms240





reportAmount : infinity


ReportConfigToAddMod



reportConfigId : 3



reportConfig




reportConfigEUTRA





triggerType






event







eventId








eventA2









a2-Threshold









:


:



threshold-RSRP : 1


























sameAsTriggerQuantity




































































需要查看参考资料,


待补




































































































移动性参数





































































































































hysteresis : 0




timeToTrigger : ms256


triggerQuantity : rsrp


reportQuantity


:







maxReportCells : 8







reportInterval : min60







reportAmount : r1



measIdToAddModList




MeasIdToAddMod





measId : 1





measObjectId : 1





reportConfigId : 1




MeasIdToAddMod





measId : 2





measObjectId : 1





reportConfigId : 2




MeasIdToAddMod





measId : 4





measObjectId : 1





reportConfigId : 3



quantityConfig




quantityConfigEUTRA





filterCoefficientRSRP : fc4





filterCoefficientRSRQ : fc4



measGapConfig : release



s-Measure : 90



speedStatePars




setup





mobilityStateParameters






t-Evaluation : s180






t-HystNormal : s180






n-CellChangeMedium : 8






n-CellChangeHigh : 8





timeToTrigger- SF






sf-Medium : oDot5






sf- High : oDot5


radioResourceConfigDedicated



srb-ToAddModList




SRB-ToAddMod





srb-Identity : 2





rlc-Config






explicitValue


RLC















am


















































































RRC
























参数























































































































SRB










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



RLC








ul- AM-RLC











t-PollRetransmit : ms250



DRB









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-Config


MAC


层参数














setup














periodicPHR- Timer : sf200














prohibitPHR-Timer : sf100














dl-PathlossChange : dB6










physicalConfigDedicated











cqi-ReportConfig












cqi-ReportModeAperiodic : rm30












nomPDSCH-RS-EPRE-Offset : 0












cqi-ReportPeriodic













setup


RRC














cqi-PUCCH-ResourceIndex : 3














cqi-pmi-ConfigIndex : 9
















cqi- FormatIndicatorPeriodic


widebandCQI


参数















simultaneousAckNackAndCQI : true













物理层




soundingRS-UL-ConfigDedicated








setup






层参数










srs-Bandwidth : bw0













srs-HoppingBandwidth : hbw0













freqDomainPosition : 0













duration : true













srs-ConfigIndex : 15













transmissionComb : 1













cyclicShift : cs7











antennaInfo












explicitValue













transmissionMode : tm2













ue- TransmitAntennaSelection : release










6)



RRC: RRCConnectReconfigurationComplete


Message type: DCCH_UL


Direction: Uplink


Computer Timestamp: 14:57:42.406


uL-DCCH-Message



message




c1





rrcConnectionReconfigurationComplete


:






rrc-TransactionIdentifier : 1






criticalExtensions : rrcConnectionReconfigurationComplete-r8





12 00


主要内容:


RRC


重配消息确认 。






7)



RRC: RRCConnectionRelease


Message type: DCCH_DL


Direction: Downlink


Computer Timestamp: 14:58:12.546


dL-DCCH-Message



message




c1





rrcConnectionRelease






rrc-TransactionIdentifier : 3






criticalExtensions







c1








rrcConnectionRelease-r8









releaseCause : other


主要内容:


RRC


释放消 息






8)



RRC: MasterInformationBlock


Message type: BCCH_BCH


Direction: Downlink


Computer Timestamp: 14:58:12.890


bCCH-BCH-Message



message




dl-Bandwidth : n6





______


a)


下行系统带宽【


4


比特】





phich-Config







_________b) PHICH


资源指示【


3


比特】






phich-Duration : normal





phich-Resource : oneSixth




systemFrameNumber : 11101011_________


2)


系统帧号





spare : 1010100111


03 AE A7 AC 00 DE




< p>


MIB


,约


31


比特】,在


PBCH


上传输,携带下列信息:



1)


物理层参数:



a)


下行系统带宽【


4


比特】



b) PHICH


资源指示【


3


比特】



2)


系统帧号(


SFN



8


比特】,除非通过另外的方式提供)



3) CRC



16


比特】



SIB


系统信息在


DL-SCH


上传输。按照调度要求(例如:周期)的不同,这些信息又分



在若干个


SI


上传输,系统最少支持


4



SI


(即


SI-1


、< /p>


SI-2



SI-3


SI-4


),


SI

< p>
的信息不做







,但可能使用重传机制,最大

< p>
TB


大小约为


1200bit

< br>。






9)



RRC: Paging


Message type: PCCH


Direction: Downlink


Computer Timestamp: 15:07:24.234


pCCH-Message



message




c1





paging






pagingRecordList







PagingRecord








ue-Identity









s-TMSI










mmec : 00000001










m-TMSI : 11101100








cn- Domain : ps


主要内容:


TMSI Domain





10)



RRC: MeasurementReport


Message type: DCCH_UL


Direction: Uplink


Computer Timestamp: 15:11:32.781


uL-DCCH-Message



message




c1





measurementReport






criticalExtensions







c1








measurementReport-r8









measResults










measId : 1










measResultServCell











rsrpResult : 41




























































rsrqResult : 26


measResultNeighCells



measResultListEUTRA




MeasResultEUTRA





physCellId : 37





measResult






rsrpResult : 44


主要内容:切换上报




2.



NAS


层信令内容



1)



NAS: Attach Request


Message type: EPS MM


Direction: Uplink


Computer Timestamp: 14:57:41.937


uL-DCCH-Message



message




c1





rrcConnectionSetupComplete






rrc-TransactionIdentifier : 2






criticalExtensions







c1








rrcConnectionSetupComplete-r8









selectedPLMN-Identity : 1









dedicatedInfoNAS


:


85e0ed0201d116000000


00000a00


Attach Request



Security header type: (0) Plain NAS message, not security protected




protocol_discriminator : EPS Mobility Management



NAS EPS Mobility Management Message Type : (0x41) Attach request




Type of security context flag (TSC): (0) Native security context




NAS key set identifier: (7) No key is available



Spare bit(s): 0




EPS attach type: (1) EPS attach




EPS mobile identity - Old GUTI or IMSI




Length : 8 octets




odd/even indic: 1




Type of identity: (1) IMSI





IMSI: 463



UE network capability




Length : 5 octets




EEA0: (1) Support




128-EEA1: (1) Support




128-EEA2: (1) Support




EEA3: (0) Not support




EEA4: (0) Not support




EEA5: (0) Not support




EEA6: (0) Not support




EEA7: (0) Not support




EIA0: (1) Support




128-EIA1: (1) Support




128-EIA2: (1) Support




EIA3: (0) Not support




EIA4: (0) Not support




EIA5: (0) Not support




EIA6: (0) Not support




EIA7: (0) Not support




UEA0: (0) Not support




UEA1: (0) Not support




UEA2: (0) Not support




UEA3: (0) Not support




UEA4: (0) Not support




UEA5: (0) Not support




UEA6: (0) Not support




UEA7: (0) Not support




UCS2 support (UCS2): (0) Not support




UMTS integrity algorithm UIA1: (0) Not support




UMTS integrity algorithm UIA2: (0) Not support




UMTS integrity algorithm UIA3: (0) Not support




UMTS integrity algorithm UIA4: (0) Not support




UMTS integrity algorithm UIA5: (0) Not support




UMTS integrity algorithm UIA6: (0) Not support




UMTS integrity algorithm UIA7: (0) Not support




1xSRVCC capability: (0) SRVCC from E-UTRAN to cdma2000



1xCS Not supported



ESM message container




Length : 29 octets




ESM message container contents: 2 1 d0 11 27 17 80 80 21 10 1 0 0 10 81 6 0 0 0 0 83 6


0 0 0 0 0 a 0






0000 .... = EPS bearer identity : 0





.... 0010 = protocol_discriminator : (2) EPS session management messages






Procedure transaction identity : 1





NAS EPS session management messages : (0xd0) PDN connectivity request






PDN type: (1) IPv4






Request type: (1) Initial attach






Protocol Configuration Options

-


-


-


-


-


-


-


-



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