1、移動通信Security Level:LTE用戶面培訓TECHNOLOGIES CO.,.通信網(wǎng)PDF created with FinePrint pdfFactory Pro trial version移動通信l 用戶面簡介l 包數(shù)據(jù)匯聚層（PDCP）l 無線鏈路層（RLC）接入層（MAC）lTECHNOLOGIES CO.,.Page 2通信網(wǎng)PDF created with FinePrint pdfFactory Pro trial version移動通信用戶面簡介TECHNOLOGIES CO.,.Page 3通信網(wǎng)PDF created with FinePrint pdfFac

2、tory Pro trial version移動通信用戶面在E-UTRAN的位置TECHNOLOGIES CO.,.Page 4通信網(wǎng)PDF created with FinePrint pdfFactory Pro trial version移動通信面和用戶面的協(xié)議棧TECHNOLOGIES CO.,.Page 5通信網(wǎng)PDF created with FinePrint pdfFactory Pro trial versioncontrol-plane protocol stackUser-plane protocol stack移動通信L2的下行結(jié)構ROHCROHCROHCROHCPDC

3、PSecuritySecuritySecuritySecuritySegm. ARQ etcSegm. ARQ etcSegm. ARQ etcSegm. ARQ etcRLC.BCCHPCCHScheduling / Priority HandlingMACMultiplexing UE1Multiplexing UEnHARQHARQTECHNOLOGIES CO.,.Page 6通信網(wǎng)PDF created with FinePrint pdfFactory Pro trial version移動通信L2的上行結(jié)構PDCPRLCMACMultiplexingTECHNOLOGIES CO

4、.,.Page 7通信網(wǎng)PDF created with FinePrint pdfFactory Pro trial versionROHCROHCSecuritySecuritySegm. ARQ etc.Segm. ARQ etcLogical ChannelsScheduling / Priority Handling移動通信包數(shù)據(jù)匯聚層（PDCP）TECHNOLOGIES CO.,.Page 8通信網(wǎng)PDF created with FinePrint pdfFactory Pro trial version移動通信PDCP在協(xié)議棧中的位置TECHNOLOGIES CO.,.Page

5、 9通信網(wǎng)PDF created with FinePrint pdfFactory Pro trial version移動通信PDCP層的架構UE/E-UTRANRadio BearersPDCPentiyPDCP-SAPPDCP-SAP.C-SAPPDCPsublayerPDCP - PDURLC - SDU.RLCsublayerRLC UM / TM-SAPRLC AM-SAPTECHNOLOGIES CO.,.Page 10通信網(wǎng)PDF created with FinePrint pdfFactory Pro trial version移動通信PDCP 層的功能- header c

6、ompression and decompression of IP data flows using the ROHCprotocol, at the transmitting and receiving entity, respectively;p- transfer of data (user plane or control plane). This function is used for conveyanceof data between users of PDCP services;p-maintenance of PDCP sequence numbers for radio

7、bearers mapped on RLC AM; in-sequence delivery of upper layer PDUs at handover;duplicate elimination of lower layer SDUs at handover for radio bearers mappedpppon RLC AM;-ciphering and deciphering of user plane data and control plane data; integrity protection and integrity verification of control p

8、lane data; timer based discard;duplicate discarding.ppppTECHNOLOGIES CO.,.Page 11通信網(wǎng)PDF created with FinePrint pdfFactory Pro trial version移動通信PDCP層功能(面)TECHNOLOGIES CO.,.Page 12通信網(wǎng)PDF created with FinePrint pdfFactory Pro trial version移動通信PDCP層功能(用戶面)TECHNOLOGIES CO.,.Page 13通信網(wǎng)PDF created with Fin

9、ePrint pdfFactory Pro trial version移動通信RoHC (Robust header compression)TECHNOLOGIES CO.,.Page 14通信網(wǎng)PDF created with FinePrint pdfFactory Pro trial versionProfile IdentifierUsage:Reference0x0000No compressionRFC 49950x0001RTP/UDP/IPRFC 3095, RFC48150x0002UDP/IPRFC 3095, RFC48150x0003ESP/IPRFC 3095, R

10、FC48150x0004IPRFC 3843, RFC48150x0006TCP/IPRFC 49960x0101RTP/UDP/IPRFC 52250x0102UDP/IPRFC 52250x0103ESP/IPRFC 52250x0104IPRFC 5225移動通信加密功能l 加密用戶面數(shù)據(jù)和面數(shù)據(jù)：面：PDCP PDU的數(shù)據(jù)部分和MAC-I部分（messagepauthentication code ）被加密；如果面數(shù)據(jù)沒有完整性保護，則MAC-I部分仍然，不過值設置為0；p 用戶面：PDCP PDU的數(shù)據(jù)部分被加密；p 加密的算法和密鑰都是的；設置的，加密的激活也是由來做TECHNOL

11、OGIES CO.,.Page 15通信網(wǎng)PDF created with FinePrint pdfFactory Pro trial version移動通信完整性保護功能l 完整性保護應用于面數(shù)據(jù)(SRB)完整性保護和完整性pp 完整性保護的算法和密鑰都是來做的；設置的，它的激活也是由TECHNOLOGIES CO.,.Page 16通信網(wǎng)PDF created with FinePrint pdfFactory Pro trial version移動通信PDCP的丟包處理：l PDCP實體收到上層遞交的一個PDCP SDU，就會為這個SDU啟動一個Discard_Timerl 當一個PD

12、CP SDU的Discard_Timer超期時，UE就會丟棄這個PDCPSDU以及由它生成的PDCP PDU。如果這個PDCP的話，就向底層發(fā)一個丟棄指示命令PDU已經(jīng)傳遞到底層TECHNOLOGIES CO.,.Page 17通信網(wǎng)PDF created with FinePrint pdfFactory Pro trial version移動通信PDCP Reordering windowTECHNOLOGIES CO.,.Page 18通信網(wǎng)PDF created with FinePrint pdfFactory Pro trial version移動通信無線鏈路層（RLC）TECHN

13、OLOGIES CO.,.Page 19通信網(wǎng)PDF created with FinePrint pdfFactory Pro trial version移動通信RLC在協(xié)議棧中的位置TECHNOLOGIES CO.,.Page 20通信網(wǎng)PDF created with FinePrint pdfFactory Pro trial version移動通信RLC的結(jié)構TECHNOLOGIES CO.,.Page 21通信網(wǎng)PDF created with FinePrint pdfFactory Pro trial version移動通信TM 實體TECHNOLOGIES CO.,.Page

14、 22通信網(wǎng)PDF created with FinePrint pdfFactory Pro trial version移動通信UM 實體TECHNOLOGIES CO.,.Page 23通信網(wǎng)PDF created with FinePrint pdfFactory Pro trial version移動通信AM 實體AM-SAPDCCH/DTCHDCCH/DTCHTECHNOLOGIES CO.,.Page 24通信網(wǎng)PDF created with FinePrint pdfFactory Pro trial version移動通信RLC層的功能Transfer of upper la

15、yer PDUs;Error correction through ARQ (only for AM data transfer); Concatenation, segmentation and reassembly of RLC SDUs (only for UM and AM data transfer);Re-segmentation of RLC data PDUs (only for AM data transfer);In sequence delivery of upper layer PDUs (only for UM and AM data transfer);Duplic

16、ate detection (only for UM and AM data transfer); RLC SDU discard (only for UM and AM data transfer); RLC re-establishment;Protocol error detection and recovery.lllllllllTECHNOLOGIES CO.,.Page 25通信網(wǎng)PDF created with FinePrint pdfFactory Pro trial version移動通信Segmentation / Concatenation/ Re-segmentati

17、onSegmentation就是分段，LTE中它只在UM的實體或者AM實體的側(cè)l執(zhí)行。當由MAC層指示的總的RLC PDU大小小于RLC SDU時，RLC實體就會根據(jù)此情況對RLC SDU執(zhí)行分段操作，讓生成的RLC PDU能適配進去。Concatenation就是串接，LTE中它只在UM的實體或者AM實體的側(cè)l執(zhí)行。當由MAC層指示的總的RLC PDU大小大于RLC SDU時，RLC層就會根據(jù)此情況對RLC SDU執(zhí)行串接操作，讓一個RLC SDU和其他RLC SDU或者其他RLC SDU的分段串聯(lián)起來，讓生成的RLC PDU能適配進去。Re-segmentation就是重分段，LTE中它只

18、在AM實體的側(cè)執(zhí)行。RLC AMl實體支持ARQ重傳，當重傳的RLC PDU無法適配到由MAC層指示的總的RLCPDU大小時，RLC層就會根據(jù)此情況對重傳的RLC PDU執(zhí)行分段操作，讓生成的RLC PDU分段能適配進去。TECHNOLOGIES CO.,.Page 26通信網(wǎng)PDF created with FinePrint pdfFactory Pro trial version移動通信RLC AM的ARQ功能l RLC AM實體的側(cè)RLC數(shù)據(jù)PDUs到對端RLC AM實體，對端接收側(cè)接收到RLC數(shù)據(jù)PDUs，并在以下兩種情況下狀態(tài)報告給側(cè)p 收到側(cè)發(fā)來的Pollingp 檢測到RLC數(shù)

19、據(jù)PDU接收失敗側(cè)會進行重傳在以下兩種情況p 收到接收側(cè)發(fā)來的狀態(tài)報告指示有數(shù)據(jù)包未接收lp 本側(cè)底層發(fā)來的HARQ失敗指示TECHNOLOGIES CO.,.Page 27通信網(wǎng)PDF created with FinePrint pdfFactory Pro trial version移動通信RLC AM的狀態(tài)報告方觸發(fā)(通過在RLC PDU中置Polling位為1來觸發(fā)）p 最后一個包，發(fā)方buffer中沒有數(shù)據(jù)p T_Poll_Retransmit定時器超時(Polling觸發(fā)后沒有收到回應)l完Poll_PDU個PDU后將P為置為1 （PDU個數(shù)觸發(fā)）完Poll_Byte個字節(jié)后將P

20、為置為1 （Byte位觸發(fā)）p 每p 每l 接收方觸發(fā)p 檢測到接收的RLC數(shù)據(jù)PDU錯誤時，觸發(fā)狀態(tài)報告TECHNOLOGIES CO.,.Page 28通信網(wǎng)PDF created with FinePrint pdfFactory Pro trial version移動通信RLC的丟包功能l 當收到丟棄指示命令丟棄特定的RLC SDU時，UM或AM RLC實體的發(fā)送端應該丟棄指示的RLCPDU中)SDU(只有在該SDU還沒有被到RLC數(shù)據(jù)TECHNOLOGIES CO.,.Page 29通信網(wǎng)PDF created with FinePrint pdfFactory Pro trial

21、version移動通信接入層(MAC)TECHNOLOGIES CO.,.Page 30通信網(wǎng)PDF created with FinePrint pdfFactory Pro trial version移動通信MAC在協(xié)議棧中的位置TECHNOLOGIES CO.,.Page 31通信網(wǎng)PDF created with FinePrint pdfFactory Pro trial version移動通信MAC層的功能TECHNOLOGIES CO.,.Page 32通信網(wǎng)PDF created with FinePrint pdfFactory Pro trial versionMAC fu

22、nctionUEeNBDownlinkUplinkMapping between logical channels and transport channelsMultiplexingXXXXDe-multiplexingXXXXError correction through HARQTransport Format SelectionPriority handling between UEsPriority handling between logical channels of one UELogical Channel prioritisationXXScheduling inform

23、ation reportingXX移動通信通道和DL Channel mappingUL Channel mappingTECHNOLOGIES CO.,.Page 33通信網(wǎng)PDF created with FinePrint pdfFactory Pro trial version移動通信MAC層的主要過程和操作l 隨即接入過程 Random access procedurel 不連續(xù)接收DRXl 調(diào)度 Schedulingl 混合冗余重傳HARQTECHNOLOGIES CO.,.Page 34通信網(wǎng)PDF created with FinePrint pdfFactory Pro tr

24、ial version移動通信RACHTECHNOLOGIES CO.,.Page 35通信網(wǎng)PDF created with FinePrint pdfFactory Pro trial version移動通信隨機接入的場景l(fā) Initial access from RRC_IDLE;l Initial access after radio link failure;l UL data arrival during RRC_CONNECTED requiring random access procedure; E.g. when UL synchronisation status is &

25、quot;non-synchronised" or there are no PUCCH resources for SR available.l Handover requiring random access procedure;l DL data arrival during RRC_CONNECTED requiring random access procedure; E.g. when UL synchronisation status is “non-synchronised”;All for contention base RA;last two for non-co

26、ntention based RATECHNOLOGIES CO.,.Page 36通信網(wǎng)PDF created with FinePrint pdfFactory Pro trial version移動通信隨機接入過程競爭RA非競爭RATECHNOLOGIES CO.,.Page 37通信網(wǎng)PDF created with FinePrint pdfFactory Pro trial version移動通信DRXTECHNOLOGIES CO.,.Page 38通信網(wǎng)PDF created with FinePrint pdfFactory Pro trial version移動通信DRX概

27、念和一些定義l DRXp Stop monitoring PDCCH during some period of time.l Purpose of DRXp DRX functionality for RRC-CONNECTED allowing for optimised configurations that allow good UE power savings and network optimisations, for UEs introducing the possibility for better UE stand-by times without the need for

28、going to RRC-IDLE mode to reach the goal.l On duration Timerp UE每次從DRX醒來后維持醒著的時間,UE在該段時間內(nèi)搜索PDCCHl Inactivity Timerp UE在醒著時每次l Active TimeHARQ初始的PDCCH后保持active的時間p UE從DRX醒來后保持醒著的總時間l HARQ RTT Timerp UE預期DL Retransmission到達的最少間隔時間l DRX Retransmission Timerp UE預期接收DL Retransmission的時間l DRX cycle length

29、p DRX cycle length一旦配置/重配置就固定，即因為active time大于on duration而變化。1R2-075009 SamsungTECHNOLOGIES CO.,.Page 39通信網(wǎng)PDF created with FinePrint pdfFactory Pro trial version移動通信DRX操作的圖例pTECHNOLOGIES CO.,.Page 40通信網(wǎng)PDF created with FinePrint pdfFactory Pro trial version移動通信SchedulingTECHNOLOGIES CO.,.Page 41通信網(wǎng)

30、PDF created with FinePrint pdfFactory Pro trial version移動通信調(diào)度l 目的p 調(diào)度的好壞對于系統(tǒng)的性能影響很大，對于LTE十分重要p 最好的利用時/頻/空/功率Qos，提高系統(tǒng)的容量l 基本調(diào)度原則用于不同的UEs和不同的業(yè)務，保證各種業(yè)務的p eNB負責上下性的調(diào)度，上下行是不同的調(diào)度器負責業(yè)務的Qos，業(yè)務量以及相關的無線承載，無線條件p 調(diào)度器需要考慮的因素以及UE能力等p 給于UE的UL-SCH的是對應一個UE的，而不是對應一個RB的TECHNOLOGIES CO.,.Page 42通信網(wǎng)PDF created with FinePrint