통신시스템(Cdma network)

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  • 1. Telecommunication Basics(CDMA Network)Software Engineering Lab -

2. Remember Again !!! 1G 2G 3G3.5G4G WiMAX track 802.15e Wave1802.15e Wave2 802.16e802.16n(Mobile WiMAX) (Mobile WiMAX) WiMAX R1.5WiMAX R2.0 CDMA-1XCDMA-1XCDMA-1XCDMA track EV-DO r0 EV-DO rA EV-DO rBUMB AMPSIS-95 A IS-95 BCDMA-1XEV-DVGSM track EDGELTE LTE Advanced NMTGSMGPRSW-CDMA W-CDMA W-CDMAW-CDMAW-CDMA R5R6 R7HSPA+R3 (HSCPA)(HSUPA)(HSPA+)Phase2 , , , , , , 3. CDMA Evolution IS-95A (2G) First CDMA protocol, published in May99 14.4/9.6 kbps circuit/packet data IS-95B (2.5G) Most analog information is removed Some technical corrections New Capabilities, such as higher data rate 64 kbps packet data CDMA 2000 1X High speed data (144 kbps packet data with Mobile IP) Coding (Turbo) and Modulation (Hybrid QPSK) Enhanced Power Control Reverse link detection Forward link modulation 4. CDMA 2000 Roadmap with Next Generation 3G CDMA Evolution Path CDMA20001X1X Enhancement DL: 153 kbps e.g., More than doubles voice capacity UL: 153 kbpsVoIP1xEV-DO 1xEV-DO EV-DO EV-DO Rel. 0Rel. ARel. BEnhancementDL: 2.4 Mbps DL: 3.1 MbpsDL: 9.3 Mbps DL: 14.7 Mbps e.g., DL data rates up toUL: 153 kbps UL: 1.8 MbpsUL: 5.4 Mbps UL: 5.4 Mbps 40 Mbps OFDMA Evolution Path VoIP LTE DL: 36-147 Mbps UL: 14~72 MbpsVoIPMobile WiMAXMobile WiMAX(802.16e) (802.16m) FFR = 1/3/1FFR = 1/3/1 DL: 35 MbpsDL: up to 100 Mbps UL: 8.2 Mbps UL: up to 20 Mbps2001 2002 2003 200420052006 20072008200920102011+ 5. CDMA NetworkUE AccessCore NetworkIntelligent HLRBTS#1 BSC#1 PeripheralSCE/SMS SCFPSTN MS MSC/VLRGANPLMN PCBTS#64R IWF PDSN InternetPDSN MS BSC#65BSC#12 ASDCN AAA O&AIWF : Inter Working FunctionPDGN : Packet Data Gateway Node Voice PathGAN : Global ATM NetworkR : RouterData PathHLR : Home Location RegisterSCE : Service Creation EnvironmentSignaling + TrafficDCN : Data Core Network SMS : Service Management SystemPSDN : Packet Data Serving Node SCP : Service Control Point 6. CDMA 2000 Architecture SCPRANCSSMC HLRBSC PSTN MSC/VLR PSInternet Router IPBSC NetworkHAMS BTSPCF FA AAA Server CDMA System = Access Network + Core Network + Packet Network Access Network : BTS-BSC-MSC MSC Core Network : MSC , Network Packet Network : Packet , 7. PN Code (Pseudo random noise Code) 3 Types shortcode , Walsh code : long code .Long code : Short code : 215 PN . PN , PN , PN . IS-95 PN Walsh Code , time shift . time shift 0000 0000 . .00 00 0000 1111 00 0011 0011 (Exclusive-OR), 0 ( -1)00 11 1 , 0 0101 1010 , 1 0 0101 0101 , 01 01 0101 1010 01 - CDMA(IS-95) ` ` 0110 0110 CDMA(WCDMA) 01 10 ` ` 0110 1001 8. Call Processing Pilot (1/2) Pilot First MS monitors Pilot channel forInitial acquisitionPilot ChChannel estimationDetection of multi-paths for rake receiverHandoffs Sync Pilot channel is transmitted at all times by the base station. MS uses it to lock to Synch Channel toSynchronize to CDMA system timeObtain configuration parameters such asProtocol Revision (P-REV)Network Identifier (NID)Pilot PN offset long-code state Sync ChPaging channel data rate 9. Call Processing (2/2) Paging MS decodes the Paging Channel with the information received from the Sync Channel. Paging channel providesOverhead messages: systems parameter, access parameter, neighbor list, channel listMobile directed messages: page request, SMSPilot Ch Access MS uses Access channel to originate a call or to respond to a page request Access Channel is used in a random access fashionAccess Ch 10. Mobile Station StatesPower Up Call originationSynchronization or page response InitializationIdleAccess Traffic StateState State StatePaging Loss Page response completed End of call 11. Mobile Originated Voice Call FlowMSBSC MSCOverhead InfoPaging Ch. Origination MsgAccess Ch.BS Ack OrderPaging Ch.CM Service Request Null FrameFwd Traffic Ch.SCCP Connection Cfm Channel Assign MsgPaging Ch.PreambleRev Traffic Ch.BS Ack OrderFwd Traffic Ch.Assignment RequestMS Ack OrderRev Traffic Ch.Service ConnectFwd Traffic Ch.Rev Traffic Ch. Assignment Complete 12. CDMA Walsh Code : (Forward Link) (Reverse Link) Pilot Channel (PN offset) Sync ChannelForward Link Paging Channel Traffic Channel Access Channel ( )Reverse Link Traffic Channel 13. CDMA 2000 Channel Mapping Logical / Physical Channel MappingF/R-DTCH F/R-DTCHF-BTCH Logical F/R-CSCH F-CSCH F/R-DSCH (Data Service) (Voice Service) ChannelCommon ChannelBMAC MultiplexMultiplex Sub-LayerMultiplex Sub-Layer Sub-Layer PrPDCH ControlFrPDCH ControlFunctionFunction F-SYNC F-CPCCH R-ACH F/R-DCCHF-RCCH R-REQCHR-ACKCH F-PDCCCH1F-SCH Physical F-BCCHF-EACH F-PCH F/R-FCHF-GCH R-PDCCH R-PDCHF-PDCH ChannelF-CACH F/R CCCHF/R-SCH F-ACKCH F-CQICHF-PDCCH0F/R-DSCH for SignalingF/R-DTCH for Data/VoiceF-BTCH for BroadcastMapping in Forward link and Reverse Link 14. IS-95 Channel Overhead Channel, Control Channel, Signaling Channel : CDMA Channel (1.23 MHz)Pilot ChannelSync ChannelPaging Channel 1PagingChannel 7TrafficChannel 1TrafficChannel 2 TrafficChannel 55W=0 W=32W=1W=7 W=8 W=9W=63 * Channel Walsh Code CDMA Channel (1.23 MHz)Access Channel 1Access Channel 2Access Channel 3AccessChannel NTrafficChannel 1TrafficChannel 2 TrafficChannel N * Channel PN 15. Forward Channel (1/2) IS-95A PilotChannel SyncChannel PagingChannel 1 PagingChannel 7 Traffic Channel 1Traffic Channel N TrafficChannel 55TrafficPCS DataPCS Power Control Subchannel IS-95B Traffic PilotChannel SyncChannel PagingChannel 1PagingChannel 7 TrafficChannel 1Traffic Channel NChannel Traffic ChannelTraffic Channel 55N+1N+7FundamentalSupplementalSupplementalPCSChannel DataChannel 1 DataChannel 7 Data 16. Forward Channel (2/2) IS-2000SR : Spreading RatesRC : Radio Configuration CDMA Channel (1.23 MHz)Signaling IS-95 CommonCommon Power CommonPagingPilotSync TrafficBroadcast Quick Paging AssignmentControlControl ChannelsChannelsChannelsChannelChannelsChannels ChannelsChannels Channels (SR1)IS-95 Transmit Auxiliary PilotAuxiliaryDiversity Transmit Diversity ChannelsPilot Channels Pilot ChannelPilot ChannelsIS-95 Diversity Dedicated Supplemental SupplementalFundamental Power Control Control Code Channels ChannelsChannelSubchannel (RC 1,2) Channel(RC3,9)Signaling IS-95 IS-95B 2 17. Forward Channel Description (1/2)Channel Description RCCCH (Reverse Common Control Channel) EACH F-CPCCH(Enhanced Access Channel) Closed Loop Power Control (Forward Common Power Control Channel) , F-CACH Packet F-CACH . EACH R-CCCH(Forward Common Assignment Channel) F-CPCCH Overhead 19.2 Kbps. BCCH IS-95 Paging Channel Overhead Page (Broadcast Control Channel) , IS-2000 Overhead BCCH Page F-CCCH Signaling , . F-CCCH Page (General Page Message, Universal (Forward Common Control Channel)Page Message), Extended Channel Assignment Message, SMS ( Order ) . IS-2000QPCH (Quick Paging Channel)Indicator . 18. Forward Channel Description (2/2) ChannelDescription Signaling Traffic F-DCCH IS-95A, B Signaling Traffic (Forward Dedicated Control Channel), IS-2000 Service Option Signaling IS-95A, B Traffic 14.4 Kbps F-FCH Signaling , RC (Radio(Forward Fundamental Channel)Configuration) 1.2Kbps~14.4Kpbs F-PCS Traffic Closed Loop Power Control FFCH F-(Forward Power Control Subchannel)DCCH 1.25msec(800bps) . IS-95B Traffic Traffic F-SCCH 7 . (Forward Supplemental Code Channel) F-FCH IS-2000 Traffic Traffic 2 F-SCH (Forward Supplemental Channel) RC 19. Reverse Channel (1/2) IS-95A CDMA Channel AccessChannel 1 AccessChannel 2 AccessChannel 3AccessChannel NTrafficChannel 1 Traffic Channel 2 TrafficChannel N IS-95B AccessChannel 1 AccessChannel 2 AccessChannel 3AccessChannel NTrafficChannel 1 Traffic Channel 2 TrafficChannel N Supplemental Supplemental SupplementalChannel 1 Data Channel 1 Data Channel 1 Data 20. Reverse Channel (2/2) IS-2000 CDMA Channel (SR1 or 3) IS-2000 AccessTraffic Channel Enhanced Access Common Control Traffic ChannelChannel(RC1 or 2)ChannelChannel(RC 3~6))IS-95A Fundamental Channel Pilot Channel Pilot Channel Pilot ChannelSupplemental CodeEnhanced Access Common Control Dedicated ControlChannel (0~7)ChannelChannel Channel (0-1) Fundamental Channel (0~1)IS-95B Supplemental Code SR : Spreading Rates Channel (0~2) RC : Radio ConfigurationPower Control Subchannel 21. Reverse Channel Description Channel DescriptionACH IS-95 (Access Channel) IS-95A, B IS-2000 Pilot EACH - (4.8 Kbps 9.6, 19.2, 38.4 Kbps) (Forward Common Assignment Channel) - - Closed Loop Power Control - R-CCCH Signaling EACHR-CCCH SMS . (Reverse Common Control Channel) F-CCC . EACH EACH Walsh Code . R-PICH EACH, R-CCCH, Traffic Channel(R-FCH RSCH) (Reverse Pilot Channel) IS-95 . R-PICH 1.25 msec R-PCS 1.25msec .(Reverse Power Control Subchannel) IS-95 20msec Traffic Channel EIB (Erasure Indicator Bit) .