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CDMA Fundamental & ZTE CDMA 2000 solutions

CDMA Fundamental & ZTE CDMA 2000 solutions. Academus Tian 田锋 CDMA Division ZTE CO. Band Class. There are totally 8 band class by IS-2000 ： Band Class 0 USA Cellar UP824-849 Reverse869-894 ； Band Class 1 USA PCS UP1850-1910 Reverse1930-1990 ； Band Class 2 TACS UP872-915 Reverse917-960 ；

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CDMA Fundamental & ZTE CDMA 2000 solutions

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  1. CDMA Fundamental&ZTE CDMA 2000 solutions Academus Tian 田锋 CDMA Division ZTE CO.

  2. Band Class • There are totally 8 band class by IS-2000： • Band Class 0 USA Cellar UP824-849 Reverse869-894； • Band Class 1 USA PCS UP1850-1910 Reverse1930-1990； • Band Class 2 TACS UP872-915 Reverse917-960； • Band Class 3 JTACS UP832-870 Reverse887-925； • Band Class 4 KOREA PCS UP1750-1780 Reverse1840-1870； • Band Class 5 NMT-450 UP412-420、450-460、479-483，Reverse420-430、460-470、489-493； • Band Class 6 IMT-2000 UP1920-1980 Reverse2110-2170； • Band Class 7 USA700MHz CELLAR UP776-794 Reverse746-764。

  3. G !!! • 1G 2G 3G • ？？？？？？？？ • G = Generation • 1G: AMPS, NMT • 2G: IS95, GSM • 3G: IMT-2000(cdma2000, WCDMA,SC-TDMA)

  4. BASIC CONCEPTIONS • CHANNEL • CODE • DIVERSITY

  5. CHANNEL • Legacy communication • A physical connection is set up • PCM. TD(Time Division Multiplex) more capacity LE

  6. FDMA /House Certain frequency is allocated for a channel

  7. Certain frequency and time slot is allocated for a channel TDMA /Apartment

  8. All frequency resource and all time are allocated for a channel . ? CDMA /City Hall

  9. Why is Qualcomm so rich? • CDMA technology has used a long time before Qualcomm introducing to public • For its high security, CD technology has been used for military for a long time • Power control gives the CD technology real capacity. • Without good Power control algorithm, a CDMA system is unstable and with little capacity.

  10. Now we can communicate But they are not cellar/mobile system yet • Capacity? • cellar/mobile system need more capacity than 1 pairs or several pairs of channels • 1000~2000 per basestation is suitable

  11. CDMA Rules No. 1 • Forward : limitation is Power • More channels means more RF power needed • More channels leads to PA over-load • Reverse: limitation is Channel • CSM5000 chip-set has 64 forward channel elements, only 32 reverse channel elements

  12. Code in CDMA • Code Division Multiple Access • CDMA uses code to differentiate channel. • Code: • Walsh Code. 64/IS95, 128/2000 1x, 256/2000 3x • To identify channel • PN Code. • To identify Base Station

  13. CDMA communication core • Bandwidth • Sharon • C(b/s)=Hlog2(1+S/N) • Capacity • Power control

  14. BS BS Time Diversity RF Diversity Spatial diversity MS Soft hand off Rake Receiver Two antenna 1.25 MHz Correlator t Correlator RX1 Correlator RX0 MS 200 - 300 KHz Diversity Technique • 3 receive unit is used in MS; BTS use 4 receiver for diversity BS antenna diversity

  15. System Architecture

  16. System Architecture MSC EIR IWF F L E B Abis A MS BTS BSC MSC VLR Um Q C D G SC SC HLR VLR M H M ESME AUC

  17. Network Architecture: The Components • PSTN - Public Switched Telephone Network • MSC - Mobile Switching Center • BSC - Base Station Controller • BTS - Base Transceiver Station (a cell) • HLR - Home Location Register • VLR - Visitor Location Register • MS - Mobile Station • IWF- Interworking Function • Internet

  18. MSC • Provides and controls mobile access to the PSTN • Interprets the dialed number • Routes and switches call to destination number • Manages mobile’s mobility • Manages mobile’s calls • Manages mobile’s supplementary services • Coordinates intersystem handoff

  19. BSC • Radio interface management (through BTS, MS) • Centralizes radio frequency (RF) resources • Provides allocation and management of radio resources • Handoff coordination

  20. BTS • A group of modems operating in parallel • “MODEM POOL” equals to CHM board • RF Interface to the mobile (Tx, Rx) • Antennas • RF signal modulation/demodulation • Time distribution

  21. A minimum BSS system MSC BSC BTS

  22. System Architecture

  23. System Platform • The Base of the whole system • Inner System Data bus • Like other system: Handset, Router…. Clock Control RF SVBS HIRS

  24. HIRS High-speed Interconnect Router Subsystem Main HIRS: 16*19.44=311.04Mbps Slave HIRS: 8*5=40Mbps

  25. HIRS

  26. TS Ethernet 接口 HIRS clk TOD clk BSM dis dis U 形 U 形 co co 2 2 I C I C 网关 网关 NCM NCM NCM NCM NIM NIM NIM NIM CPS 422 CPM 0 CPM 0 7 7 0 7 7 CDSUS BSC_CDSU BSC_CDSU E1 非信道化 SVBS SVBS 非信道化 E1 BDS BDS BTS_CDSU BTS_CDSU BDS BTS_CDSU Main HIRS

  27. TS Ethernet 接口 HIRS clk TOD clk BSM dis dis U 形 U 形 co co 2 2 I C I C 网关 网关 NCM NCM NCM NCM NIM NIM NIM NIM CPS 422 CPM 0 CPM 0 7 7 0 7 7 CDSUS BSC_CDSU BSC_CDSU E1 非信道化 SVBS SVBS 非信道化 E1 BDS BDS BTS_CDSU BTS_CDSU BDS BTS_CDSU Sub HIRS

  28. ZXC10-BSC/PCF Architecture • CPS：Call Processing Sub-system • BSM: Base Station Management Sub-system • TS:Timing Sub-system • CDSU：Channel Data Service Unit • HIRS: High-speed Interconnect Router Subsystem • SVBS:Selector/Vocoder Bank Sub-system • PCFS：Packet data Control Functions Sub-system

  29. Real Picture of BSC • HIRS: High speed inter routing system • NCM: Network Control Module • NIM: Network interface Module • CDSU:Channel Data Service Unit • CPS: Call Processing Sub-system • CPM: Call Processing Module • TS :Time sub-system • TCM:Time Control Module • GPSTM：GPS/GLONASS Receiver Module • SVBS:Selector/Vocoder Bank Sub-system • SVM:Selector/Vocoder Module • SVICM: Selector/Vocoder Control Module • PCFS:Pack data Control Function sub-system • PCF: Pack data Control Function • PCFIM: Pack data Control Function interface Module

  30. ZTE BSC /Backup Mechanism Base Station Controller Call Processing Subsystem (1 + 1) Packet Control Function M + 1 PDSN M = 1 ~ 9 High Speed Interconnection Router Subsystem (HIRS) NIM: 2 * (8 + 1) NCM: (1 + 1) Selector & Vocoder Bank Subsystem (N + 1) MSC Timing Subsystem (1 + 1) Channel Digital Service Units N = 1 ~ 15 E1s E1s E1s BTS BTS BTS

  31. ZXC10-BSC Specification • Max. 170,000 subs at 30mErl/sub • 240 E1 links to MSC; • 380 E1 links to BTSs; • 7,200 selector/vocoder; • Vocoder: 8k,13K,EVRC; • 5,040 Erl traffic capacity; • BSC/PCF supports up to 2,400 active sessions and 40,000 dormant PPP sessions • MTBF > 20 Years • Recovery Time < 15 Minutes • Dimension： 810mm x 600mm x 2000 mm • Weight：290kg • Power consumption： • Central Rack：750W • SVM Rack： 750W

  32. SVBS

  33. SVBS • Codec for QCELP,EVRC and 64kb/s PCM • CDMA system power control functions • Signaling interface between MSC and BSC(SS7) • Selector Selector : process the routines of Handoff/Handover CODEC SVBS 8K EVRC Wireless 64K PCM Wireless

  34. SVBS • One SVM can handle 15 channels • One SVBS sub-system can handle 120 channels • One ESVIM can handle 6 IWF channels • One SVBS rack can hold 10 SVBS sub-system • One BSC can support 6 SVBS racks

  35. CDSU

  36. CDSU • 192 channels per 1 E1. • Based on Packet data mode BSC BTS CDSU Abis Non-channelized E1 CDSU CDSU SDH PDH Satellite MicroWave …. CDSU CDSU

  37. CDSU Abis Based On CDSU • Data communication between BTS and BSC • Using normal E1 • Daisy chain networking E1 E1 BTS BTS BTS To BSC

  38. BTS

  39. BTS /Base Station

  40. E1 BDS RFS C D S U Monitoring GPS TFS ZXC10-BTS1x80 BTS Architecture • RFS:Radio Frequence Sub-system • BDS:Base band Data Sub-system • CDSU:Channelized Data Service Unit • TFS：Timing Frequence Sub-system

  41. BTS Architecture GPS HIRS CDSU BDS

  42. BTS Data flow Remote RF Subsystem Local RF Subsystem TRXs TRXs HPAs/LPAs HPAs/LPAs RFEs RFEs GPS GPS + GPS GPS + Glonass Glonass GPS* BTS Baseband Subsystem CEs Cable BTS Fiber

  43. BTS RF Subsystem 1 Sector RFE RFE R X 0 R X 1 R X 1 R X 0 T X T X HPA HPA TRX TRX Max. 3 sectors

  44. ZXC10-BTS • RFS:RF sub-system • RFE: RF element • HPA: High Power Amplifier • TRX: Trans-receiver • TFS：Time Frequency sub-system • GPS • TCM • FDM • BDS:Base band Digital sub-system • RFIM: RF Interface Module • CHM32/64: 1x Channel Board • CCM: Communication Control Module • CDSU:Channel Data Service Unit

  45. ZXC10-BTS 1x 80 Specification • Frequency: 450MHz, 800MHz, 1.9GHz • Sector: 1 - 3 sectors • Carrier: 1 - 4 • RF power: 30watts （450MHz, 800MHz） • 20watts （1.9GHz ) • Forward Link: 256 - 768 Channels/Carrier • Reverse Link: 128 - 384 Channels/Carrier • Capacity: 48 simultaneous calls/sector-carrier • 3x144kbps data/sector-carrier • Dimensions: 180cm x 70cm x 60cm (H x W X D) • MTBF: > 10 Years • Recovery Time < 5 Minutes

  46. ZTE CDMA 1X Provides Total Solutions to Our Customers

  47. MSC (ZXC10) Common Platform Architecture Distributed Integrated GMSC MSC/VLR HLR/AC STP SSP GMSC MSC/VLR HLR/AC STP SSP Common Platform • The ZTE common platform architecture will REDUCE YOUR INVESTMENT!!! • Integrated solutions for the suburban and rural coverage areas • Distributed solutions for the dense urban and urban coverage areas • Reduced resources in the system Operation, Administration & Maintenance

  48. PSDN PSTN CDMA Cellular Mobile Communication System Network Structure STP IWF GMSC SS7 E L Abis Ai BTS BSC A MSC/VLR C Q PDSN HLR/AC N SME M SMSC

  49. MSC Highlights Call Model: 75 mErl/Sub MSC Loading: 75% Max. Capacity: 280K Subscribers Call processing ability: 5000K BHCA Max. traffic : 21000Erl Max. number of SS7 : 640 Links Dimensions: 200cm x 81cm x 60cm (HxWxD) Weight: ≤ 250Kg Power Supply: -48VDC Voltage tolerance : –57V to –40V Power: ≤700w (MPM module) ≤1170w (CSM module)

  50. ZXC10-HLR/AUC • Max. Capacity: 1,200K Subscribers • Reliability: Active/Standby or Load Sharing • Virtual HLR Configurable • SS7 Links: 32 for a Single Module & 192 for Multiple Modules • Message Loss Probability < 10-7 • MTBF > 10 Years

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