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8.1. 8.2. 8.3. 8.4. 概述. LTE 的系统结构. LTE 的空中接口. LTE 关键技术. 第 8 章 LTE. 3G 技术长期演进( Long Term Evolution,LTE )与以往的移动通信系统不同,无线接入网的空中接口技术和核心网的网络结构都发生了较大的变化。. 本章主要内容如下: LTE 的主要特点和 LTE 的研究现状 LTE 网络结构 E-UTRAN 的结构,主要网元和接口的功能. 核心网( EPC )结构,主要网元和接口的功能 LTE 空中接口的协议结构及各层功能 - PowerPoint PPT Presentation
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8 LTE
3GLong Term Evolution,LTE
LTELTELTEE-UTRAN
EPCLTELTE
8.1 1LTE WiMAX
3G3G
3GPP3GPP23GLong Term EvolutionLTEAir Interface EvolutionAIE200723GPP2cdma2000 1x EV-DOUltra Mobile BroadbandxUMB20074
3GPP3G LTE20041220069Study ItemSI2006920079Work ItemWI
20092010 3GPP LTE3GPP R820093R8
LTE
2LTE1LTE
MBMS
2LTE 3GPP LTE 1.2520MHz50Mbit/s100Mbit/s
3GPP R624 5ms100ms 3GPP3GPP
MBMS IPIP Multimedia SubsystemIMS
CSCSPSVoIP
3LTE12
4LTE LTE
LTE3GLTE20003G2010 HSPA+RAN2
8.2 LTE8.2.1 LTE/SAE
8-1 LTE/SAE
8-2 E-UTRANEPC
8.2.2 E-UTRAN1E-UTRANUTRAN LTERNC
E-UTRANeNode BRNCeNode BS1RNCeNode BMobility Management EntityMMEServing Gateway entitiesS-GW
S-GWeNode B
LTEeNode BNode B3GPPRNCMAC
eNode BeNode BMeshUTRAN
IP LTE3GPPIP
2E-UTRAN1eNode B2E-UTRAN X2 Sl LTE-Uu
3E-UTRAN8-3 E-UTRAN
4E-UTRAN1eNode BX2 X2 X2
8-4 X2
8-5 X2
2eNode BEPCS1 S1 S1
8-6 S1
8-7 S1
8.2.3 EPC1SAE8-8 SAE
1SAE 3GPP3GPP Anchor SAESAE Anchor Inter Access System AnchorIASA
evolved Packet Data GatewayePDG User Plane EntityUPE
2SAE S1 S2a S2b S3 S4
S5a S5b S6 S7 SGi
2EPC LTECNEvolved Packet CoreEPC8-1
EPCMMEserving GWPDN GWPCRFHome Subscriber ServerHSS
1MME2S-GW3P-GW4PCRF5HSS
3UE/ eNode B /EPC1UE/eNode B/MME8-9 UE/eNode B/MME
2UE/eNode B/8-10 MME/MME
8-11 E-UTRANUE-P-GW
4LTEIP 3GPPIMSR5R6R7R8IMSR5R6R7R8
8.3 LTE8.3.1 Uu
8-12
L1L2L3
8.3.2 1 MAC
12FEC3HARQ
456/
789MIMO
101112
21 Broadcast ChannelBCH Downlink Shared ChannelDL-SCH Paging ChannelPCH Multicast channelMCH
2 Uplink Shared ChannelUL-SCH Random Access ChannelRACH
31 18-13 1
2 8-14 2
2 Physical Broadcast ChannelPBCHPhysical Control Format Indicator ChannelPCFICH
Physical Downlink Control ChannelPDCCHPhysical Downlink Shared ChannelPDSCHPhysical Multicast ChannelPMCH
Physical Uplink Control ChannelPUCCHPhysical Uplink Shared ChannelPUSCH
Physical Hybrid ARQ Indicator ChannelPHICHPhysical Random Access ChannelPRACH
4 8-15
8-16
8.3.3 12
8-17 E-UTRAN2
2MAC1MAC RLCProtocol Data UnitPDURLC
HARQ
8-18 UE2
UE UE
2
38-19
8-20
3RLC1PDUAMUMTM2ARQ
3TB4Service Data UnitSDUFFS
5PDU67eNode BUE
4PDCP1ROHC2NASRLC34NAS
8.3.4 RRC1RRC1NASAS23RRC
4RRC5RB
6UEUEeNode B
7QoS8/9NAS
2RRC UTRANUE5RRCIDLECELL_DCHCELL_FACHCELL_PCHURA_PCHLTERRCRRC_IDLERRC_CONNECTED
123RRC
8-21 RRC
8.4 LTE8.4.1 OFDM Orthogonal Frequency Division MultiplexingOFDMMulti-Carrier ModulationMCM
OFDM
1OFDM18-22
2OFDM
8-23OFDMOFDM
8-23 OFDM
OFDM
3OFDM8-24 OFDM
8-25 OFDMIFFT
8-26 OFDM
2 OFDM
8-27OFDM
8-27
ICI8-28
8-28
8-29
3OFDMA Orthogonal Frequency Division Multiple AccessOFDMAOFDM
OFDMAOFDMOFDM
4OFDM1OFDM FFTOFDM
OFDM
FFTFFT OFDM
OFDMMIMOOFDMMIMO
2OFDM
8-30 a QPSK b16QAM c64QAM
FFTFFT
8.4.2 MIMO1
Single-Input Single-OutputSISOMultiple-Input Multiple-OutputMIMO
MIMOSingle-Input Multiple-OutputSIMO/Multiple-Input Single-OutputMISO
8-31 MIMO
2123
8.4.3 1 MIMO
Space-Time Trellis CodeSTTCSpace-Time Block CodeSTBCLayer Space-Time CodeLSTC/Differential/Unitary Space-time ModulationD/USTMConcatenated Space-Time Code
MIMO
2 Space-Time Trellis CodeSTTCTarokh, SeshadriCalderbankUngerbock
Undgerbock
8-32
8-32
3 Space-Time Block CodeSTBC
8-33 Alamouti
8-34 Alamouti
8-35 Alamouti
4 Layer Space-Time CodeLSTCG.J.FoschiniMIMOBLASTBelllaboratories Layered SpaceTime Architecture
1LTESAE
LTE
OFDMMIMO
2LTEMBMS
3LTEeNode BNode B3GPPRNCHARQMACARQ
eNode BeNode BMeshUTRAN IPeNode BX2S1MMS/S-GWeNode BLTE-UuUEE-UTRAN
4LTECNEvolved Packet CoreEPC EPCMMEserving GWPDN GWPCRFHome Subscriber ServerHSS
5Uu
LTE FDDTDDLTER99/R4
6LTE1GenericFDDTDD2AlternativeTDD
7LTEPBCHPCFICHPDCCHPDSCHPMCH
PUCCHPUSCHPHICHPRACH
8UTRANUE5RRCLTERRCRRC_IDLERRC_CONNECTED
UERRCRRC_CONNECTED RRC_CONNECTEDUE
UERRCUERRC_CONNECTEDRRC_IDLE
9OFDM
OFDM
10MIMO
11MIMO
12MIMO
STTCSTBCLSTC/D/USTM