LTE内部培训_无线网络层介绍（PPT40页)

LTE内部培训无线网络层概要•协议架构•系统架构•RNLC介绍•RNLU介绍内部公开▲协议架构－整体内部公开▲协议架构－协议栈信令流eNBPHYUEPHYMACRLCMACMMERLCNASNASRRCRRCPDCPPDCPAPPUDPGTPUIPS1APSCTPSGWIPUDPGTPUIPSCTPS1APX2AP数据流内部公开▲协议架构－RNL相关变化RNLC的变化不再有专用传输信道。LTERRC状态简化到两个。只有PS业务。RNLU的变化信令/数据都走PDCP。加解密也移到PDCP。ROHC在VOIP等IMS业务时成为必选。RLC支持再分段。IUB和FP消失，对应Iur口变化成S2接口。传输网络层全部IP化。内部公开▲系统架构－整体MCHUPBMCHPHYUPBRNLCCPUGESwitchLMTsRIOSwitchUPB3光口到RRUGESwitchGE到S1/X2PHYPHY33GEsRIORNLUDLMACULMACRNLUQE内部公开▲系统架构－RNLCDRMMCHDCMCRMOSS.DBS.CCMRNLCSCHUPBCMACPHYPHYUE控制信令RNLC内部控制信令小区控制信令S1/X2接口控制信令CPMBCMUSMRNLU内部公开▲系统架构－RNLC信令流MCHUPBMCHPHYUPBRNLCCPUGESwitchLMTsRIOSwitchUPB3光口到RRUGESwitchGE到S1/X2PHYPHY33GEsRIORNLUDLMACULMACRNLUQEDLsRIOSwitchULUL内部公开▲系统架构－RNLUPDCPRLCDMACULCMACPHYFaradayRLCPDCP控制流数据流DMACRLCCCIUUCIURRCFaradayPHY板DLCMACFaradayTBSizeIndicationToUeInfoHARQStatusIndicationRBBufReqestFromUeInfoDataReqDataIndDataReqDataIndIP/UDP/GTPUIP/UDP/GTPUQECC板GESwitch内部公开▲系统架构－RNLU数据流MCHUPBMCHPHYUPBRNLCCPUGESwitchLMTsRIOSwitchUPB3光口到RRUGESwitchGE到S1/X2PHYPHY33GEsRIORNLUDLMACULMACRNLUQEDLsRIOSwitchULUL内部公开▲RNLC按功能划分公共流程小区管理、公共信道管理（建立/重配/删除）S1、X2接口管理寻呼、广播专用流程移动性（小区选择和切换）RRC连接管理RAB/RB管理其它功能业务数据维护MBMSSON内部公开▲控制面基本工作过程触发原因（RRC连接请求、RRC连接重建、RAB指派、测量报告、配置变更…）判决过程/准入机制（信令/业务接纳、切换算法…）流程执行/各层协议栈配置/接续关系建立（eNB内部配置、各层协议栈配置、各接口接续关系建立）内部公开▲RNLC按模块划分CPM：S1公用处理；X2公用处理；信令转发；寻呼CCM：公共资源控制管理（小区、信道、公共测量控制）CRM：公共资源管理算法（小区、信道、功率分配）DCM：RRC连接控制、QOS控制、移动性控制、安全控制、L1/L2控制、NAS传递、S1专用处理、X2专用处理DRM：专用资源管理算法：移动性算法，等BCM：广播模块关系详见P7内部公开▲系统算法——eNBRNLC的大脑移动性算法之切换：频内、频间、跨系统间切换移动性算法之小区选择和重选算法接纳算法：用户接入控制和资源分配QoS算法ICIC物理层参数配置其它算法算法辅助需求：测量管理功能内部公开▲典型流程－随机接入UEeNBRandomAccessPreamble1RandomAccessResponse2ScheduledTransmission3ContentionResolution4UEeNBRAPreambleassignment0RandomAccessPreamble1RandomAccessResponse2L2/L3indicatesRandomAccessPreambletransmissionL1transmitsRandomAccessPreambleL2/L3procedureL1procedureACK(RandomAccessResponsereception)DTXreception(NoRandomAccessResponsereception)L2/L3receivesindicationfromL1L2/L3receivesindicationfromL1L2/L3indicatesRRCConnectionRequesttransmissionL2/L3indicatesRandomAccessPreambletransmission内部公开▲公共过程－小区建立/重配DASCRMMULSDMDLSDUSMPHYEV_DAS_CCM_CELLCFG_REQEV_CCM_USM_COMMRES_CFG_REQCCMRRUEV_CCM_MULSD_COMMRES_CFG_REQEV_CCM_MDLSD_COMMRES_CFG_REQEV_CCM_PHY_COMMRES_CFG_REQEV_CCM_RRU_COMMRES_CFG_REQ从DAS从从从从从从从从从从从从从从CRM从API从从从从从从从USM/MULSD/MDLSD/PHY从DSP从从从从EV_USM_CCM_COMMRES_CFG_RSPEV_MULSD_CCM_COMMRES_CFG_RSPEV_MDLSD_CCM_COMMRES_CFG_RSPEV_PHY_CCM_COMMRES_CFG_RSPEV_RRU_CCM_COMMRES_CFG_RSPEV_DAS_CCM_CELLCFG_UPDATEDASCRMMULSDMDLSDUSMPHYCCMRRU内部公开▲公共过程－系统消息更新DASCRMBCMCPMUSMPHY从从DAS从CRM从从从从从从从从从MIB从从SIB从从从从从从从从从EV_DAS_CRM_SYSTEMINFO_UPDEV_CRM_BCM_SYSTEMINFO_UPD从从MIB从从从从从从从从从从从从从从从从从从从从从DASCRMBCMCPMCCIUBPEV_BCM_USM_SYSTEMINFOEV_USM_PHY_BCCHMSGEV_CRM_BCM_SYSTEMINFO_UPD内部公开▲公共过程－寻呼MMEBCMCPMUSMUECRM从从从从从从从从从从从从从paging从从MMEBCMCPMUSMUECRMpagingEV_BCM_CPM_PAGING_INDEV_CPM_USM_PAGINGPagingMSG内部公开▲典型流程－初始上下文建立UEeNBMMES1-AP:INITIALCONTEXTSETUPCOMPLETE+eNBUEsignallingconnectionID+BearerSetupConfirm(eNBTEID)S1-AP:INITIALUEMESSAGE(FFS)+NAS:ServiceRequest+eNBUEsignallingconnectionIDS1-AP:INITIALCONTEXTSETUPREQUEST+(NASmessage)+MMEUEsignallingconnectionID+SecurityContext+UECapabilityInformation(FFS)+BearerSetup(ServingSAE-GWTEID,QoSprofile)RRC:RadioBearerSetup(NASMessage)RRC:RadioBearerSetupCompleteRandomAccessProcedureNAS:ServiceRequestPagingPaging内部公开▲专用流程－RRC连接建立过程DCMDRMMULSDPHYUEMMEUSMMDLSDRandomAccessRrcconnectionReq从从UCIC从从,从从GID从从从从从从从从DSP从从从从从从从EV_DCM_MULSD_UECTXT_CFG_REQRrcConnectionSetupUlInformationTransferInitiaUeMessageInitialContextSetupRequestRrcConnectionReconfigurationRrcConnectionReconfigurationCompInitialContextSetupRspRrcconnectionReqEV_DCM_USM_UECTXT_CFG_REQEV_DCM_MDLSD_UECTXT_CFG_REQEV_DCM_PHY_UECTXT_CFG_REQEV_USM_DCM_UECTXT_CFG_RSPEV_MULSD_DCM_UECTXT_CFG_RSPEV_MDLSD_DCM_UECTXT_CFG_RSPEV_PHY_DCM_UECTXT_CFG_RSPDCMDRMMULSDPHYUEMMEUSMMDLSD内部公开▲专用流程－业务建立DCMUSMMULSDMDLSDSAEBEARERSETUPREQUEST(S1APID、SAEBearerID、TransportLayerAddress、GTP-TEID、NAS-PDU、QoSparameters)SAEBEARERSETUPRESPONSE(IP,TEID)UEMMEEV_DCM_USM_UECTXT_CFG_REQ逻辑信道相关配置、GTPU相关配置EV_USM_DCM_UECTXT_CFG_RSPRRCCONNRECONFIGCOMPRRCCONNECTIONRECONFIGURATION(RRConfig,etc)12345678910111213141516PHYS1APIDVerifySMA传输接纳无线接纳，初始资源及参数计算EV_DCM_MULSD_UECTXT_CFG_REQEV_DCM_MDLSD_UECTXT_CFG_REQEV_DCM_PHY_UECTXT_CFG_REQ完成IP分配、GTPU创建、RB参数配置配置逻辑信道信息配置逻辑信道信息变更UE相关物理层上下文参数EV_MULSD_DCM_UECTXT_CFG_RSPEV_MDLSD_DCM_UECTXT_CFG_RSPEV_PHY_DCM_UECTXT_CFG_RSP在QE上创建转发表项(TEID,COS,VPNID,TargetIP)17激活新配置内部公开▲专用流程－切换过程从目标小区和源小区的位置可分为：eNB内切换通过X2接口的eNB间切换通过S1接口的eNB间切换下面以“通过S1接口的eNB间切换”为例内部公开▲典型流程|跨站切换LegendpacketdatapacketdataULallocation2.MeasurementReports3.HOdecision4.HandoverRequest5.AdmissionControl6.HandoverRequestAck7.HandoverCommandDLallocationDataForwarding11.HandoverConfirm17.ReleaseResource12.PathSwitchRequestUESourceeNBTargeteNBServingGatewayDetachfromoldcellandsynchronizetonewcellDeliverbufferedandintransitpacketstotargeteNBBufferpacketsfromSourceeNB9.Synchronisation10.ULallocation+TAforUEpacketdataDataForwardingFlushDLbuffer,continuedeliveri