【网络工程】Nokia-GSM原理介绍.ppt

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1、PPTPPTPPTPPT文档演模板文档演模板文档演模板文档演模板 Office Office Office Office PPTPPTPPTPPT20 五月 2023【网络工程】【网络工程】Nokia-GSM原理介绍原理介绍PPTPPTPPTPPT文档演模板文档演模板文档演模板文档演模板 Office Office Office Office PPTPPTPPTPPTGlobal System for Mobile(Groupe Special Mobile)G S MPPTPPTPPTPPT文档演模板文档演模板文档演模板文档演模板 Office Office Office Office PP

2、TPPTPPTPPT1982 Groupe Special Mobile?is created within CEPT1986 A Permanent Nucleus is set up1987 Main radio transmission techniques are chosen,based on prototype evalution(1986)1989 GSM becomes an ETSI technical committe1990 The phase 1 GSM 900 specifications are finalized1991 First systems are run

3、ning 1992 All major European GSM 900 operators begin commercial operator GSM Development HistoryPPTPPTPPTPPT文档演模板文档演模板文档演模板文档演模板 Office Office Office Office PPTPPTPPTPPT Speech Services Data Services Short Message Services(SMS)Supplementary Services Subscriber Identity Module(SIM)Security FunctionGS

4、M/DCS1800 FunctionalitiesPPTPPTPPTPPT文档演模板文档演模板文档演模板文档演模板 Office Office Office Office PPTPPTPPTPPTRF AspectsTDMA0.3GMSK ModulationBurst Power TransmissionNeighbour Cells MeasurementHoppingUplink/Downlink DTxBER&Receiver Testing PPTPPTPPTPPT文档演模板文档演模板文档演模板文档演模板 Office Office Office Office PPTPPTPPTPP

5、TGSM900/DCS1800/PCS1900PPTPPTPPTPPT文档演模板文档演模板文档演模板文档演模板 Office Office Office Office PPTPPTPPTPPTGSM Frequency Range890-915 MHz Uplink/MS Transmit935-960 MHz Downlink/BS TransmitDuplex Offset 45 MHzChannel Spacing 200kHzChannel numbering 1-124Transmission Speed 270 Kbits PPTPPTPPTPPT文档演模板文档演模板文档演模板文档

6、演模板 Office Office Office Office PPTPPTPPTPPTDCS1800 Frequency Range1710-1785 MHz Uplink/MS Transmit1805-1880 MHz Downlink/BS TransmitDuplex Offset 95 MHzChannel Spacing 200kHzChannel numbering 512-885Transmission Speed 270 Kbits PPTPPTPPTPPT文档演模板文档演模板文档演模板文档演模板 Office Office Office Office PPTPPTPPTP

7、PTGSM Primary Band890900910920930940950960Freq45 MHzUplink(Mobile to Base)Downlink(Base to Mobile)PPTPPTPPTPPT文档演模板文档演模板文档演模板文档演模板 Office Office Office Office PPTPPTPPTPPTDCS1800 Primary Band17101735176017851800182518501875Freq95 MHzUplink(Mobile to Base)Downlink(Base to Mobile)PPTPPTPPTPPT文档演模板文档演模

8、板文档演模板文档演模板 Office Office Office Office PPTPPTPPTPPTCarriers at the border of the GSM band890.2890.4890.6890.8FreqGSM band200 kHzPPTPPTPPTPPT文档演模板文档演模板文档演模板文档演模板 Office Office Office Office PPTPPTPPTPPTCarriers at the border of the DCS1800 band1710.21710.41710.61710.8FreqDCS1800 band200 kHzPPTPPTPPT

9、PPT文档演模板文档演模板文档演模板文档演模板 Office Office Office Office PPTPPTPPTPPTGSM NetworksBSCBTSBTSBTSBSSBSCBTSBTSBTSBSSMSCMSCOMCOMCADCNMCVLRVLRHLRAUCEIRInterface to other networkMSPPTPPTPPTPPT文档演模板文档演模板文档演模板文档演模板 Office Office Office Office PPTPPTPPTPPTGSM NetworksTerminology:MS-Mobile Station(移动台移动台)BSS-Base St

10、ation System(基站系统基站系统)BTS-Base Transceiver Station(基站收发台基站收发台)BSC-Base Station Controller(基站控制器基站控制器)MSC-Mobile Switching Centre(移动业务交换中心移动业务交换中心)OMC-Operations and Maintenance Centre (操作与维护中心操作与维护中心)NMC-Network Management Centre(网络管理中心网络管理中心)AUC-Authentication Centre(鉴权中心鉴权中心)HLR-Home Location Regi

11、ster(归属位置寄存器归属位置寄存器)VLR-Visitors Location Register (来访位置寄存器来访位置寄存器)EIR-Equipment Identity Register(设备标识寄存器设备标识寄存器)PPTPPTPPTPPT文档演模板文档演模板文档演模板文档演模板 Office Office Office Office PPTPPTPPTPPTMSCBSCBSCBSCPSTNBTSBTSBTSAir InterfaceAbis InterfaceSS#7SS#7GSM InterfaceMSPPTPPTPPTPPT文档演模板文档演模板文档演模板文档演模板 Offic

12、e Office Office Office PPTPPTPPTPPTGMSK Modulation110010110010PSKGuassian FilterSpectrum 200kHzPPTPPTPPTPPT文档演模板文档演模板文档演模板文档演模板 Office Office Office Office PPTPPTPPTPPTFcFc+67.708KHzFc+67.708KHz+67.708KHz-67.708KHzData Type?0Data Type?1ModulationPPTPPTPPTPPT文档演模板文档演模板文档演模板文档演模板 Office Office Office

13、Office PPTPPTPPTPPT401234567123456FrequencyAmplitudeARFCNTimeslotPhysical Channel isan ARFCN and TimeslotTDMA and FDMAPPTPPTPPTPPT文档演模板文档演模板文档演模板文档演模板 Office Office Office Office PPTPPTPPTPPTTDMA and FDMATerminology:FDMA -Frequency Division Multiple AccessTDMA -Time Division Multiple AccessARFCN -Ab

14、solute RF Channel NumberTS -TimeslotPhysical -The Combination of a TS number Channels and ARFCN.Logical -Are Mapped on Physical Channels ChannelsPPTPPTPPTPPT文档演模板文档演模板文档演模板文档演模板 Office Office Office Office PPTPPTPPTPPT10us10us10us10us8us8us3311575726 148 Active Bits,546.42us 147 Useful Bits542.8us-7

15、0dB-30dB-6dB+4dB-6dB-30dB-70dBTol-1.0dBTol+1.0dBGSM TDMA Power BurstPPTPPTPPTPPT文档演模板文档演模板文档演模板文档演模板 Office Office Office Office PPTPPTPPTPPTPower Time Template542.8 us/147 Bits1081010810TimePower-700dBUpper LimitLower LimitActualusNormal BurstPPTPPTPPTPPT文档演模板文档演模板文档演模板文档演模板 Office Office Office Of

16、fice PPTPPTPPTPPTPower Time Template321.23 us/87 Bits1081010810TimePower-700dBUpper LimitLower LimitActualusAccess Burst87 bitsPPTPPTPPTPPT文档演模板文档演模板文档演模板文档演模板 Office Office Office Office PPTPPTPPTPPTUplink&DownlinkDownlink/MS Receive5670123456701342067012345671342Uplink/MS Transmit5PPTPPTPPTPPT文档演模

17、板文档演模板文档演模板文档演模板 Office Office Office Office PPTPPTPPTPPTUplink&DownlinkARFCN02473601350614725312645724603571321045670123456700345670123451ARFCNUPLINKDOWNLINK45MHz.Uplink Lags Downlink by 3 Timeslot periods.Uplink and Downlink use same Timeslot Number.Uplink and Downlink use same Channel Number(ARFC

18、N).Uplink and Downlink use different bands(45MHz apart for GSM900)PPTPPTPPTPPT文档演模板文档演模板文档演模板文档演模板 Office Office Office Office PPTPPTPPTPPTFrequency HoppingMODCouplerSwitchSynthRegisterControlUplink BS 1BS 2MonitoringRX LevRX QualDownlink 165124165124Home BSPPTPPTPPTPPT文档演模板文档演模板文档演模板文档演模板 Office Of

19、fice Office Office PPTPPTPPTPPT20ms BlocksSpeech CoderBits Ordered260 Bits260 Bits5013278.RELP and LTP Coder RELP-Residual-Excited Linear Prediction Coder LTP-Long Term Prediction.Converts Speech to Low Data Rate.20ms Speech makes 260Bits.Output 13kbit/sVery Important BitsImportant BitsOther BitsSpe

20、ech CoderPPTPPTPPTPPT文档演模板文档演模板文档演模板文档演模板 Office Office Office Office PPTPPTPPTPPTError CorrectionType Ia 50Type Ib 132Type II 7850132783Type IaCRCType IbType IIBlock Code256625663478Re-ordering37878Half rate convolutional code456 Bits from 20ms of SpeechType IaType IbType IbType IaTailType IICRC262

21、 BitsIn456 BitsOutPPTPPTPPTPPT文档演模板文档演模板文档演模板文档演模板 Office Office Office Office PPTPPTPPTPPTDiagonal Interleaving456 Bits from 20ms of Speech456 Bits from 20ms of Speech575757575757575757575757575757575757575757575757575757575757TCHTraffic Channel(TCH)Bursts Carry Two 57 Bits Blocks(114)Each120ms of

22、Speech=456x6=2736 bits2736/114=24 bursts I.e.24frames(mobile transmits once per frame)Multiframe has 26 frames in 120msThere are 2 spare frames厖厖 One SACCH,one Idle 中国最大的资料库下载中国最大的资料库下载PPTPPTPPTPPT文档演模板文档演模板文档演模板文档演模板 Office Office Office Office PPTPPTPPTPPTSpeech to Radio/Radio to SpeechChannelcodi

23、ngSpeechDigitizing and Source codingInterleavingBurst formatting CipheringModulationChanneldecodingSpeechSource decodingDe-interleavingBurst formatting DecipheringDemodulationPPTPPTPPTPPT文档演模板文档演模板文档演模板文档演模板 Office Office Office Office PPTPPTPPTPPTMS Camp on Flow ChartMS Turn OnMS searches channelsa

24、nd orders by signalstrengthMSStongestBCCHFCCH on BCCH and adjusts timebaseSCH on BCCH and fine tunes timebase&timingDecode BCCH&store info Is BCCHin PLMN?MSNext StongestBCCHYESNOYESNONOLocation=Previous Location?YESYESMS camped on-listens for page,can request serviceUsing SACCH-adjust power,TA&repor

25、t RX QualetcMS goes to the assigned SDCCH(Freq.,timeslot,.)for authentication+location UpdateMS sendsRACHBS assigns SDCCH to MS using the CCCH PPTPPTPPTPPT文档演模板文档演模板文档演模板文档演模板 Office Office Office Office PPTPPTPPTPPTOrignated CallBS pages MS usingthe CCCH MS sends RACHBS ORIGINATED CALLMS ORIGINATED

26、 CALLMS responds withRACH BS assigns MS to SDCCH or TCHMS transmits and receives speech on TCHTCHUsing the FACCH onTCH authentication&location updateUsing the SDCCH,authentication,call setup,and TCH assignmentUsing the SACCH,BS commands MS to adust power+timing,MSreports power+Rx quality of BCCH+adj

27、acent BCCHMS transmits+receives speechon TCHUsing the SACCH on TCH,MSreports power+Rx quality,BScommands MS to adjust power,TADuring inactive timeslots,MS measures adjacent cells,BCCHCall disconnected by MS or BSPPTPPTPPTPPT文档演模板文档演模板文档演模板文档演模板 Office Office Office Office PPTPPTPPTPPTSubscriber Iden

28、tity Module(SIM)Subscriber Identity Module(SIM)SIM contains(at least)following information:IMSI (International Mobile Subscriber Identification)MCC&MNC (Mobile Country Code and mobile Network Code)Any other user specific informationPPTPPTPPTPPT文档演模板文档演模板文档演模板文档演模板 Office Office Office Office PPTPPTP

29、PTPPTInternational Mobile Subscriber Identity(IMSI)International Mobile Subscriber Identity(IMSI)IMSI=MCC+MNC+MSINNMSI3 digits2 digitsNot more than 15 digitsIMSI=International Mobile Subscriber IdentityMCC=Mobile Country CodeMNC=Mobile Network CodeMSIN=Mobile Station Identification NumberNMSI=National Mobile Subscriber Identity