2' & 3' Day - Radio Interface

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1Emanuele ProcaccioliRio de Janeiro, September 2005Overview G8M - GPR8 - EDGE{radio interface}2Overview GSM/GPRS/EDGERio de Janeiro, September 2005CONFIDENTIAL AllrightsreservedAGENDA AGENDA AGENDA AGENDA AGENDA AGENDA AGENDA AGENDA GSM source & channel coding GSM radio interface GSM radio planning GPRS system GPRS coding schemes GPRS protocols & procedures GPRS security EDGE radio interface EDGE coding schemes GPRS/EDGE performance comparison EDGE: LQC, LA & IR EDGE: Planning Issues MS multislot classes23Overview GSM/GPRS/EDGERio de Janeiro, September 2005CONFIDENTIAL Allrightsreserved GSM source & channel coding GSM radio interface GSM radio planning GPRS system GPRS coding schemes GPRS protocols & procedures GPRS security EDGE radio interface EDGE coding schemes GPRS/EDGE performance comparison EDGE: LQC, LA & IR EDGE: Planning Issues MS multislot classes4Overview GSM/GPRS/EDGERio de Janeiro, September 2005CONFIDENTIAL AllrightsreservedSubscriber Identity ModuleG8M Radio Chain G8M Radio Chain G8M Radio Chain G8M Radio Chain G8M Radio Chain G8M Radio Chain G8M Radio Chain G8M Radio ChainControlVoice EncodingVoice DecodingChannel CodingChannel DecodingInterleavingDe-InterleavingCipheringDe-CipheringModulation GMSKDe-ModulationAmplifier35Overview GSM/GPRS/EDGERio de Janeiro, September 2005CONFIDENTIAL AllrightsreservedBit rate after speech coding: 13 Kbps (Full Rate)Bit rate after channel coding: 22.8 Kbps (Full Rate)Enhanced full rate (EFR):13 Kbps, better voice qualityFragmented speech in high BERs situationsMore compressionHigh quality reproductionBit rate under 16 KbpsSampling at 8 KHz (Nyquist)Voice Activity Detector for using DTXG8M 8ource & Channel Coding {} G8M 8ource & Channel Coding {} G8M 8ource & Channel Coding {} G8M 8ource & Channel Coding {} G8M 8ource & Channel Coding {} G8M 8ource & Channel Coding {} G8M 8ource & Channel Coding {} G8M 8ource & Channel Coding {}6Overview GSM/GPRS/EDGERio de Janeiro, September 2005CONFIDENTIAL AllrightsreservedG8M G8M G8M G8M G8M G8M G8M G8M 8ource & Channel Coding {} 8ource & Channel Coding {} 8ource & Channel Coding {} 8ource & Channel Coding {} 8ource & Channel Coding {} 8ource & Channel Coding {} 8ource & Channel Coding {} 8ource & Channel Coding {}Channel Rate (kbps) TCH Source Code Rate22.8 kbps FR FR 13 kbps11.4 kbps HR HR 5.6 kbpsHRHRHRHRHRHRFRFRFRFRFRFRFRFRFR 22.8 kbps EFR 12.2 kbps11.4 kbps AMR 4.75 kbit/s11.4 kbps AMR 5.15 kbit/s11.4 kbps AMR 5.9 kbit/s11.4 kbps AMR 6.7 kbit/s11.4 kbps AMR 7.4 kbit/s11.4 kbps AMR 7.95 kbit/s22.8 kbps AMR 4.75 kbit/s22.8 kbps AMR 5.15 kbit/s22.8 kbps AMR 5.9 kbit/s22.8 kbps AMR 6.7 kbit/s22.8 kbps AMR 7.4 kbit/s22.8 kbps AMR 7.95 kbit/s22.8 kbps AMR 10.2 kbit/s22.8 kbps AMR 12.2 kbit/s47Overview GSM/GPRS/EDGERio de Janeiro, September 2005CONFIDENTIAL AllrightsreservedG8M G8M G8M G8M G8M G8M G8M G8M 8ource & Channel Coding {} 8ource & Channel Coding {} 8ource & Channel Coding {} 8ource & Channel Coding {} 8ource & Channel Coding {} 8ource & Channel Coding {} 8ource & Channel Coding {} 8ource & Channel Coding {}Source Code RateAMR-WB_23.85AMR-WB_23.05AMR-WB_19.85AMR-WB_6.60AMR-WB_8.85AMR-WB_12.65AMR-WB_14.25AMR-WB_15.85AMR-WB_18.25Wideband AMR (R5)AMR-NB: sampling rate 8000 sample/sec; audio bandwidth 200-3400 HzAMR-WB: sampling rate 16000 sample/sec; audio bandwidth 50-7000 Hz8Overview GSM/GPRS/EDGERio de Janeiro, September 2005CONFIDENTIAL AllrightsreservedG8M Tandem Free Operation G8M Tandem Free Operation G8M Tandem Free Operation G8M Tandem Free Operation G8M Tandem Free Operation G8M Tandem Free Operation G8M Tandem Free Operation G8M Tandem Free Operation The primary objective of TFO is to improve the speech quality in mobile-to-mobile calls by avoiding double transcoding The end-to end delay is also reducing avoiding double transcoding No bandwidth savings can be achieved using TFO Tandem free can be established only if the same speech codec is used on both sides The major constraint of TFO is that the transmission links must be transparent to the compressed speech frameMS TRAU TRAUMSBTS BTS BSC BSC MSC MSCIPE IPEAterAbis A A Abis AterMS TRAU TRAUMSBTS BTS BSC BSC MSC MSCIPE IPEAterAbis A A Abis AterPCM Links59Overview GSM/GPRS/EDGERio de Janeiro, September 2005CONFIDENTIAL AllrightsreservedBit rate after interleaving, synchronizing and signaling information: 33.9 Kbps456 bits / 20 msG8M nterleaving G8M nterleaving G8M nterleaving G8M nterleaving G8M nterleaving G8M nterleaving G8M nterleaving G8M nterleaving GPRS10Overview GSM/GPRS/EDGERio de Janeiro, September 2005CONFIDENTIAL Allrightsreserved GSM source & channel coding GSM radio interface GSM radio planning GPRS system GPRS coding schemes GPRS protocols & procedures GPRS security EDGE radio interface EDGE coding schemes GPRS/EDGE performance comparison EDGE: LQC, LA & IR EDGE: Planning Issues MS multislot classes611Overview GSM/GPRS/EDGERio de Janeiro, September 2005CONFIDENTIAL AllrightsreservedFSKMSKGMSKRequirements:Spectral efficiencyLow TX complexityLow spurious emissionsPower efficiency2FSKCP-2FSKGMSK MSKDigital Signal+xxcos( )sen( )cos( )sen( )cos(+ + + +) }dtGaussian FilterModulated SignalG8MK Modulation G8MK Modulation G8MK Modulation G8MK Modulation G8MK Modulation G8MK Modulation G8MK Modulation G8MK Modulation12Overview GSM/GPRS/EDGERio de Janeiro, September 2005CONFIDENTIAL AllrightsreservedCombined FDMA-TDMA0376541203765412Mobile Tx Base TxFrequencyTime200 KHz80 MHz4.615 msG8M Radio nterface G8M Radio nterface G8M Radio nterface G8M Radio nterface G8M Radio nterface G8M Radio nterface G8M Radio nterface G8M Radio nterface713Overview GSM/GPRS/EDGERio de Janeiro, September 2005CONFIDENTIAL AllrightsreservedP - PowerT - TimeF - FrequencyPTPTFPTFFDMA (TACS)TDMA (GSM, DECT)CDMA (UMTS)FAlternative Access Techniques Alternative Access Techniques Alternative Access Techniques Alternative Access Techniques Alternative Access Techniques Alternative Access Techniques Alternative Access Techniques Alternative Access Techniques14Overview GSM/GPRS/EDGERio de Janeiro, September 2005CONFIDENTIAL AllrightsreservedTDMA 8ystem TDMA 8ystem TDMA 8ystem TDMA 8ystem TDMA 8ystem TDMA 8ystem TDMA 8ystem TDMA 8ystem - -- - - -- - Radio nterface Radio nterface Radio nterface Radio nterface Radio nterface Radio nterface Radio nterface Radio nterface815Overview GSM/GPRS/EDGERio de Janeiro, September 2005CONFIDENTIAL Allrightsreserved000100 1110 1 6 5 4 3 2 71502525502047Transmission burst: 0.577 msTDMA frame: 4.615 ms26-Multiframe: 120 ms51-Multiframe: 235.38 msSuper-frame (6120 s)Hyper-frame: 3h 28m 53.760s.G8M Frame Hierarchy G8M Frame Hierarchy G8M Frame Hierarchy G8M Frame Hierarchy G8M Frame Hierarchy G8M Frame Hierarchy G8M Frame Hierarchy G8M Frame Hierarchy16Overview GSM/GPRS/EDGERio de Janeiro, September 2005CONFIDENTIAL AllrightsreservedTDMA 8ystem TDMA 8ystem TDMA 8ystem TDMA 8ystem TDMA 8ystem TDMA 8ystem TDMA 8ystem TDMA 8ystem - -- - - -- - Frame Hierarchy Frame Hierarchy Frame Hierarchy Frame Hierarchy Frame Hierarchy Frame Hierarchy Frame Hierarchy Frame Hierarchy917Overview GSM/GPRS/EDGERio de Janeiro, September 2005CONFIDENTIAL AllrightsreservedBCCH Broadcast ControlFrequency CorrectionSynchronization SCHFCCHSlow AssociationStand AloneFast Association FACCHSACCHSDCCHRandom AccessAccess GrantPagingRACHAGCHPCHTCH/FTCH/HFull rate (9.6 Kbps)Half rate (4.8 Kbps)TCHCCH CCCHDCCHBCHSpeechDataTCH/FTCH/HFull rate (22.8 Kbps)Half rate (11.4 Kbps)G8M Physical and Logical Channels G8M Physical and Logical Channels G8M Physical and Logical Channels G8M Physical and Logical Channels G8M Physical and Logical Channels G8M Physical and Logical Channels G8M Physical and Logical Channels G8M Physical and Logical Channels18Overview GSM/GPRS/EDGERio de Janeiro, September 2005CONFIDENTIAL AllrightsreservedTDMA 8ystem TDMA 8ystem TDMA 8ystem TDMA 8ystem TDMA 8ystem TDMA 8ystem TDMA 8ystem TDMA 8ystem - -- - - -- - Control Channels Control Channels Control Channels Control Channels Control Channels Control Channels Control Channels Control Channels1019Overview GSM/GPRS/EDGERio de Janeiro, September 2005CONFIDENTIAL AllrightsreservedB88 B88 B88 B88 B88 B88 B88 B88 Protocols Protocols Protocols Protocols Protocols Protocols Protocols ProtocolsCMMMLAPDmPh.LayerLAPDmPh.LayerUmA-bisABSCMSCLAPDmPh.LayerRRBTSMLAPDmPh.LayerRRBTSMMIF' MTPSCCPBSSAPL3L2L1BSSAPCMMMSCCPMTPGPRS20Overview GSM/GPRS/EDGERio de Janeiro, September 2005CONFIDENTIAL Allrightsreserved8ynchronization 8ynchronization 8ynchronization 8ynchronization 8ynchronization 8ynchronization 8ynchronization 8ynchronization in TDMA in TDMA in TDMA in TDMA in TDMA in TDMA in TDMA in TDMABursts MS ABursts MS BBursts BSDelay = 01121Overview GSM/GPRS/EDGERio de Janeiro, September 2005CONFIDENTIAL AllrightsreservedDelay effect on 8ynchronization Delay effect on 8ynchronization Delay effect on 8ynchronization Delay effect on 8ynchronization Delay effect on 8ynchronization Delay effect on 8ynchronization Delay effect on 8ynchronization Delay effect on 8ynchronizationBurst MS ABurst MS BBursts BSDelay = Burst MS A22Overview GSM/GPRS/EDGERio de Janeiro, September 2005CONFIDENTIAL AllrightsreservedTiming Timing Timing Timing Timing Timing Timing Timing advance advance advance advance advance advance advance advanceBurst MS ABurst MS BBursts BSTiming advance=Burst MS A1223Overview GSM/GPRS/EDGERio de Janeiro, September 2005CONFIDENTIAL AllrightsreservedPower Control {ideal} Power Control {ideal} Power Control {ideal} Power Control {ideal} Power Control {ideal} Power Control {ideal} Power Control {ideal} Power Control {ideal}RrrMBRPTPMPRPRIF(a)(a)(b)(b)24Overview GSM/GPRS/EDGERio de Janeiro, September 2005CONFIDENTIAL AllrightsreservedPower Control { Power Control { Power Control { Power Control { Power Control { Power Control { Power Control { Power