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,*,You can change the font size,You can change the font size,Press TAB to move to the next level,(Shift-TAB to the previous level),Change bullet:Format/Bullet,level 5,DO NOT TYPE ANY TEXT HERE!,Press the SLIDE VIEW icon to move to Slide 1,a)Fill in your data,b)Change the zoom to 65%,Agenda,.GSM900/DCS1800,.The GSM Network&AirInterface,.TechnicalBasics,.SpeechCoding,.Typesof Channel,.Makinga PhoneCall,G,lobal,S,ystem for,M,obile,(,G,roupe,S,pecial,M,obile),G SM,1982GroupeSpecialMobile?is created withinCEPT,1986A PermanentNucleusissetup,1987Main radiotransmission techniquesarechosen,basedonprototype evalution(1986),1989GSMbecomesanETSItechnical committe,1990Thephase 1GSM900specificationsarefinalized,1991First systems are running,1992All majorEuropeanGSM900operators begincommercial operator,GSMDevelopmentHistory,Speech Services,DataServices,Short Message Services(SMS),Supplementary Services,Subscriber IdentityModule(SIM),SecurityFunction,GSM/DCS1800 Functionalities,RF Aspects,TDMA,0.3GMSKModulation,Burst PowerTransmission,Neighbour CellsMeasurement,Hopping,Uplink/Downlink DTx,BER&Receiver Testing,GSM900/DCS1800/PCS1900,GSMFrequency Range,890-915 MHz Uplink/MS Transmit,935-960 MHz Downlink/BSTransmit,Duplex Offset 45MHz,ChannelSpacing200kHz,Channelnumbering 1-124,TransmissionSpeed 270 Kbits,DCS1800Frequency Range,1710-1785MHzUplink/MSTransmit,1805-1880MHzDownlink/BS Transmit,Duplex Offset 95MHz,ChannelSpacing200kHz,Channelnumbering 512-885,TransmissionSpeed 270 Kbits,GSMPrimaryBand,890,900,910,920,930,940,950,960,Freq,45 MHz,Uplink(Mobileto Base),Downlink(Baseto Mobile),DCS1800PrimaryBand,1710,1735,1760,1785,1800,1825,1850,1875,Freq,95 MHz,Uplink(Mobileto Base),Downlink(Baseto Mobile,),Carriersattheborder of the GSM band,890.2,890.4,890.6,890.8,Freq,GSMband,200kHz,Carriersattheborder of the DCS1800 band,1710.2,1710.4,1710.6,1710.8,Freq,DCS1800band,200kHz,GSMNetworks,BSC,BTS,BTS,BTS,BSS,BSC,BTS,BTS,BTS,BSS,MSC,MSC,OMC,OMC,ADC,NMC,VLR,VLR,HLR,AUC,EIR,Interface toother,network,MS,GSMNetworks,Terminology:,MS-Mobile Station(移,动,动台),BSS-Base Station System(基,站,站系统),BTS-Base Transceiver Station(,基,基站收发,台,台),BSC-Base Station Controller(基,站,站控制器),MSC-MobileSwitching Centre(移,动,动业务交,换,换中心),OMC-OperationsandMaintenanceCentre,(操作与,维,维护中心),NMC-NetworkManagementCentre(,网,网络管理,中,中心),AUC-AuthenticationCentre(鉴权中,心,心),HLR-Home LocationRegister(归属,位,位置寄存,器,器),VLR-Visitors LocationRegister(来,访,访位置寄,存,存器),EIR-EquipmentIdentity Register(,设,设备标识,寄,寄存器),MSC,BSC,BSC,BSC,PSTN,BTS,BTS,BTS,AirInterface,AbisInterface,SS#7,SS#7,GSMInterface,MS,GMSKModulation,1,1,0,0,1,0,1,1,0,0,1,0,PSK,GuassianFilter,Spectrum 200kHz,Fc,Fc+67.708KHz,Fc+67.708KHz,+67.708KHz,-,67.708KHz,Data Type?0,Data Type?1,Modulation,4,0,1,2,3,4,5,6,7,1,2,3,4,5,6,Frequency,Amplitude,ARFCN,Timeslot,PhysicalChannelis,anARFCNandTimeslot,TDMAandFDMA,TDMAandFDMA,Terminology:,FDMA-FrequencyDivisionMultipleAccess,TDMA-TimeDivisionMultipleAccess,ARFCN-AbsoluteRFChannelNumber,TS-Timeslot,Physical-TheCombinationofaTSnumber,ChannelsandARFCN.,Logical-AreMappedonPhysicalChannels,Channels,10us,10us,10us,10us,8us,8us,3,3,1,1,57,57,26,148 ActiveBits,546.42us,147 UsefulBits,542.8us,-70dB,-30dB,-6dB,+4dB,-6dB,-30dB,-70dB,Tol-1.0dB,Tol+1.0dB,GSM TDMA PowerBurst,PowerTimeTemplate,542.8us/147Bits,10,8,10,10,8,10,Time,Power,-70,0,dB,UpperLimit,LowerLimit,Actual,us,Normal Burst,PowerTimeTemplate,321.23 us/87Bits,10,8,10,10,8,10,Time,Power,-70,0,dB,UpperLimit,LowerLimit,Actual,us,Access Burst,87 bits,Uplink&Downlink,Downlink/MS Receive,5,6,7,0,1,2,3,4,5,6,7,0,1,3,4,2,0,6,7,0,1,2,3,4,5,6,7,1,3,4,2,Uplink/MS Transmit,5,Uplink&Downlink,ARFCN,0,2,4,7,3,6,0,1,3,5,0,6,1,4,7,2,5,3,1,2,6,4,5,7,2,4,6,0,3,5,7,1,3,2,1,0,4,5,6,7,0,1,2,3,4,5,6,7,0,0,3,4,5,6,7,0,1,2,3,4,5,1,ARFCN,UPLINK,DOWNLINK,45MHz,.Uplink Lags Downlink by3 Timeslot periods,.Uplink and Downlink usesameTimeslotNumber,.Uplink and Downlink usesameChannel Number(ARFCN),.Uplink and Downlink usedifferentbands(45MHz apart for GSM900,),FrequencyHopping,M,O,D,Coupler,Switch,Synth,Register,Control,Uplink,BS 1,BS 2,Monitoring,RX Lev,RX Qual,Downlink,1,65,124,1,65,124,Home BS,20msBlocks,Speech Coder,BitsOrdered,260Bits,260Bits,50,132,78,.RELP andLTPCoder,RELP-Residual-Excited Linear,PredictionCoder,LTP-LongTermPrediction,.ConvertsSpeech toLow,DataRate,.20ms Speech makes260Bits,.Output 13kbit/s,VeryImportantBits,ImportantBits,OtherBits,Speech Coder,ErrorCorrection,TypeIa,50,TypeIb,132,TypeII,78,50,132,78,3,TypeIa,CRC,TypeIb,TypeII,BlockCode,25,66,25,66,3,4,78,Re-ordering,378,78,Halfrateconvolutional code,456,Bitsfrom20msof Speech,TypeIa,TypeIb,TypeIb,TypeIa,Tail,TypeII,CRC,262 Bits,In,456 Bits,Out,Diagonal Interleaving,456,Bitsfrom20msof Speech,456,Bitsfrom20msof Speech,57,57,57,57,57,57,57,57,57,57,57,57,57,57,57,57,57,57,57,57,57,57,57,57,57,57,57,57,57,57,TCH,Traffic Channel(TCH)Bursts CarryTwo 57 Bits Blocks(114)Each,120msof Speech=456x6=2736bits,2736/114=24 burstsI.e.24frames(mobile transmits once perframe),Multiframehas26 framesin 120ms,Thereare2
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