LTE用户面培训(华为)

HUAWEITECHNOLOGIESCO.,LTD.用户面培训PDFcreatedwithFinePrintpdfFactoryProtrialversion用户面简介l包数据汇聚层（PDCP）l无线链路层（RLC）l媒体接入层（MAC）PDFcreatedwithFinePrintpdfFactoryProtrialversion用户面简介PDFcreatedwithFinePrintpdfFactoryProtrialversion用户面在E-UTRAN的位置PDFcreatedwithFinePrintpdfFactoryProtrialversion控制面和用户面的协议栈User-planeprotocolstackcontrol-planeprotocolstackPDFcreatedwithFinePrintpdfFactoryProtrialversion的下行结构Segm.ARQetcMultiplexingUE1Segm.ARQetc...HARQMultiplexingUEnHARQBCCHPCCHScheduling/PriorityHandlingLogicalChannelsTransportChannelsMACRLCSegm.ARQetcSegm.ARQetcPDCPROHCROHCROHCROHCRadioBearersSecuritySecuritySecuritySecurity...PDFcreatedwithFinePrintpdfFactoryProtrialversion的上行结构Multiplexing...HARQScheduling/PriorityHandlingTransportChannelsMACRLCPDCPSegm.ARQetcSegm.ARQetcLogicalChannelsROHCROHCRadioBearersSecuritySecurityPDFcreatedwithFinePrintpdfFactoryProtrialversion包数据汇聚层（PDCP）HUAWEITECHNOLOGIESCO.,LTD.Page9HuaweiConfidentialPDCP在协议栈中的位置User-planeprotocolstackcontrol-planeprotocolstackHUAWEITECHNOLOGIESCO.,LTD.Page10HuaweiConfidentialPDCP层的架构RadioBearersUE/E-UTRANPDCPsublayer...RLCsublayerPDCPentiyPDCP-PDURLC-SDUC-SAPPDCP-SAPPDCP-SAPRLCUM/TM-SAPRLCAM-SAP...PDCPentityPDCPentityHUAWEITECHNOLOGIESCO.,LTD.Page11HuaweiConfidentialPDCP层的功能p-headercompressionanddecompressionofIPdataflowsusingtheROHCprotocol,atthetransmittingandreceivingentity,respectively;p-transferofdata(userplaneorcontrolplane).ThisfunctionisusedforconveyanceofdatabetweenusersofPDCPservices;p-maintenanceofPDCPsequencenumbersforradiobearersmappedonRLCAM;p-in-sequencedeliveryofupperlayerPDUsathandover;p-duplicateeliminationoflowerlayerSDUsathandoverforradiobearersmappedonRLCAM;p-cipheringanddecipheringofuserplanedataandcontrolplanedata;p-integrityprotectionandintegrityverificationofcontrolplanedata;p-timerbaseddiscard;p-duplicatediscarding.PDFcreatedwithFinePrintpdfFactoryProtrialversion层功能(控制面)PDFcreatedwithFinePrintpdfFactoryProtrialversion层功能(用户面)PDFcreatedwithFinePrintpdfFactoryProtrialversion(Robustheadercompression)RFC5225IP0x0104RFC5225ESP/IP0x0103RFC5225UDP/IP0x0102RFC5225RTP/UDP/IP0x0101RFC4996TCP/IP0x0006RFC3843,RFC4815IP0x0004RFC3095,RFC4815ESP/IP0x0003RFC3095,RFC4815UDP/IP0x0002RFC3095,RFC4815RTP/UDP/IP0x0001RFC4995Nocompression0x0000ReferenceUsage:ProfileIdentifierPDFcreatedwithFinePrintpdfFactoryProtrialversion加密功能l加密用户面数据和控制面数据：p控制面：PDCPPDU的数据部分和MAC-I部分（messageauthenticationcode）被加密；如果控制面数据没有完整性保护，则MAC-I部分仍然存在，不过值设置为0；p用户面：PDCPPDU的数据部分被加密；p加密的算法和密钥都是高层设置的，加密的激活也是由高层来做的；PDFcreatedwithFinePrintpdfFactoryProtrialversion完整性保护功能l完整性保护应用于控制面数据(SRB)p包括完整性保护和完整性验证p完整性保护的算法和密钥都是高层设置的，它的激活也是由高层来做的；PDFcreatedwithFinePrintpdfFactoryProtrialversion的丢包处理：lPDCP实体收到上层递交的一个PDCPSDU，就会为这个SDU启动一个Discard_Timerl当一个PDCPSDU的Discard_Timer超期时，UE就会丢弃这个PDCPSDU以及由它生成的PDCPPDU。如果这个PDCPPDU已经传递到底层的话，就向底层发一个丢弃指示命令PDFcreatedwithFinePrintpdfFactoryProtrialversion无线链路层（RLC）PDFcreatedwithFinePrintpdfFactoryProtrialversion在协议栈中的位置User-planeprotocolstackcontrol-planeprotocolstackPDFcreatedwithFinePrintpdfFactoryProtrialversion的结构PDFcreatedwithFinePrintpdfFactoryProtrialversion实体PDFcreatedwithFinePrintpdfFactoryProtrialversion实体PDFcreatedwithFinePrintpdfFactoryProtrialversion实体TransmissionbufferSegmentation&ConcatenationAddRLCheaderRetransmissionbufferRLCcontrolRoutingReceptionbuffer&HARQreorderingSDUreassemblyDCCH/DTCHDCCH/DTCHAM-SAPRemoveRLCheaderPDFcreatedwithFinePrintpdfFactoryProtrialversion层的功能lTransferofupperlayerPDUs;lErrorcorrectio