xEVDO基础介绍朗讯PPT学习教案

1、会计学1xEVDO基础介绍朗讯基础介绍朗讯2第1页/共26页3Network Standard TIA/EIA/TSB115: Wireless IP Network Architecture based on IETF protocols 其他标准其他标准: :C.S.0029 Ver 2.0: Test spec C.S.0032 : AN Minimum Performance Spec C.S.0033 : AT Minimum Performance Spec第2页/共26页41xEV-DOForwardReversePilotMACTrafficControlReverse Act

2、ivity Bit Reverse PowerControl (RPC)TrafficAccessPilotMACDataAckPilotDataReverse RateIndicator (RRI)Data Rate Control(DRC)DRC Lock第3页/共26页5TDM7:1Pilot Channel ( All 0s)Simplex EncoderCodeword Repetition(Factor =37)PunctureLast 3 SymbolsSignal Point Mapping0+11-1Bi-Orthogonal EncoderCodeword Repetiti

3、on(Factor=2)Signal PointMapping0+11-1AWalsh CoverWi8, i=0,7BBitRepetitionFactor=128Signal PointMapping0+11-1CEncoderChannelInterleaverInterleavedPacketRepetitionSignal PointMapping0+11-1DW016=(+)ACK Channel 1 Bit Per SlotData ChannelPhysical LayerPacketsDRC SymbolsOne 4-Bit SymbolPer Active SlotDRCC

4、over Symbols One 3-bit Symbol Per Active SlotRRI SymbolsOne 3-Bit Symbol Per 16SlotPhysical Layer Packet W816=(+-)W48=(+-)128 Binary Symbols per Slot(Transmitted in Slot )8 Binary Symbols per Active Slot16 Binary Symbols per Active Slot7 Binary Symbols per Physical Layer Packet259 Binary Symbols per

5、 Physical Layer Packet256 Binary Symbols per Physical Layer Packet128 Binary Symbols per Physical Layer Packet1.2288 Mcps1.2288Mcps11.2288Mcps1.2288 McpsW24=(+-)第4页/共26页6CDTDMCDSequence Repetition/Symbol PuncturingISymbol DEMUX1 to 1616-aryWalsh CoversWalsh Channel Gain=1/4Walsh ChipLevel Summer16 C

6、hannelsEncoderR=1/3Or 1/5Forward Traffic Channel for Control Channel Physical Layer PacketsScramblerChannel Interleaver QPSK/8PSK/16QMModulatorISignal Point Mapping0-+11-1Walsh Cover 0IPilot Channel (All 0s)IMAC Channel RPC Bits for MACIndex I 600*(1-1/DRCLockPeriod) bpsSignal Point Mapping0-+11-1RP

7、C Channel Gain G(i)Walsh Chip Level SummerSignal Point Mapping0-+11-1RA Channel GainBit Repetition (Factor =RABLength)Walsh Cover W464SequenceRepetition( Factor=4 )64 to 1024 PN Chipsper Physical Layer Packet for PreambleMAC Channel RA Bits64-ary Walsh Cover for MACIndex i Preambles All 0sSignal Poi

8、nt Mapping0-+11-1SequenceRepetitionI32-Symbol Bi-Orthognal Cover with MACIndex iABTDMSignal Point Mapping0-+11-1DRCLock Channel Gain G(i)Bit Repetition(Factor=DRCLockLength)DRC Lock第5页/共26页7Data400 chipsRPC/DRC LockRABRPC/DRC LockRABActive Slot64RPC/DRC LockRABPilot9664RPC/DRC LockRABData400 chipsDa

9、ta400 chips64Pilot96chips64Data400 chipschips1024 chips = half slot1024 chips = half slotSystem time1 Slot 8 Slots 1 slot = 1.667 ms1/2 frame = 13.33 msFrame = 26.67 ms 16 Slots 50231546755121415135810119 4 Slots 2 Slots 4 slot = 6.66 ms2 slot = 3.33 msIdle Slot64RPC/DRC LockRABPilot9664RPC/DRC Lock

10、RABchips64RPC/DRC LockRABPilot9664RPC/DRC LockRABchips第6页/共26页8C/IC/IPilotDRC153K76K307K614K76K614K256KDRCPilot1.2M153K76K307K614K76K614K256K第7页/共26页9C/IC/IC/I307k38k1.2M614k614k2.4M614k307k1.2M2.4M614k38kTimePower第8页/共26页10第9页/共26页11CodeRateModulationTypeSlotsEncoder PacketDuration (ms)Bits per Enc

11、oderPacketData Rates(kbps)1/5QPSK1626.67102438.41/5QPSK813.33102476.81/5QPSK46.661024153.61/5QPSK23.331024307.21/5QPSK11.671024614.41/3QPSK46.662048307.21/3QPSK23.332048614.41/3QPSK11.6720481228.81/38PSK23.333072921.61/38PSK11.6730721843.21/316QAM23.3340961228.81/316QAM11.6740962457.6第10页/共26页12Code

12、 RateModulation TypeSlotsEncoder Packet Duration (ms)Bits per EncoderPacketData Rates (kbps)1/4BPSK1626.672569.61/4BPSK1626.6751219.21/4BPSK1626.67102438.41/4BPSK1626.67204876.81/2BPSK1626.674096153.6第11页/共26页13第12页/共26页14Data Modulation SymbolsData Modulation Symbols(Repeated Sequence if needed)2,5

13、60 or 3,072ModulationSymbolsPreambleN ChipsData400-N ChipsPilot&MAC224ChipsData800 ChipsPilot&MAC224ChipsPilot&MAC224ChipsData800 ChipsPilot&MAC224ChipsData800 Chips2 or 4 Slots4,096 or 8,192chipsPDU第13页/共26页15Forward Traffic ChannelPhysical Layer PacketTransmissions with 153.6 kbps(normal terminati

14、on- 4 TransmitSlots)DRC ChannelTransmissionRequesting153.6 kbpsACK ChannelHalf-SlotTransmissionsFirst Slot for the NextPhysical Layer PacketTransmissionnn+1n+8n+7n+6n+5n+4n+3n+2n+11n+10n+9n+12SlotsTransmitSlot 1TransmitSlot 1TransmitSlot 3TransmitSlot 2NAKACKNAKOne SlotHalf-SlotOffsetDRCRequest for1

15、53.6 kbps第14页/共26页16第15页/共26页17第16页/共26页18第17页/共26页19第18页/共26页20比较项CDMA 2000 1X1xEV-DO峰值速率前向：153.6Kbps (RC3) 反向：153.6Kbps (RC3) 前向：2.4Mbps反向：153.6Kbps RF与编码特性卷积码与 Turbo 码48 阶FIR滤波器只有Turbo 码FIR 滤波器与CDMA 2000 1X相同切换前向、反向都有硬切换与软切换前向：VSHO反向：软切换接入过程基本接入过程与增强接入过程基本接入过程功率与速率控制前向、反向都有快速功率控制，无速率控制前向：速率控制反向：速率控制+功率控制信道复用前向、反向都是CDM方式 前向：CDM+TDM反向：CDM 第19页/共26页21AAAATSource ANPCFPDSN(FA)Target ANAN AAAIP NetworkAAAHAATANIP NetworkA12A13A8A9A10A11Air Interface第20页/共26页22 PDSN MS/AT Internet AAA PCF AN AN AAA (Radius) PCF 1 2 4 3 第21页/共26页23EV-DO商用实验网是在CDMA 1X商用网络的基础上，选部分