The growing road for LTE TDD.ppt

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1、2023/2/19,The growing road for LTE TDD,Page 2,Contents,Standard progressTechnique featuresIndustrialization strategies,Page 3,Standard progress overview,LTE/SAE protocols for commercial realization is ready in 2008,Page 4,Contents,Standard progressTechnical featuresIndustrialization strategies,Page

2、5,Technique features Architecture and Protocol stacks,LTE TDD&FDD have same network architecture and protocol stacks.,architecture,Function split,User plane stack,Control plane stack,Little difference in Phy and MAC,Page 6,Technique features Frame structure,Keep good compatibilities and co-exist wit

3、h TD-SCDMA,LTE TDD,TDSCDMA,Page 7,DwPTS:SCH is in this slot which is similar to DwPTS in TD-SCDMAGP:DL to UL guard period in a TDD system like TD-SCDMAUpPTS:Short P-RACH or Sounding reference signal could be transmitted in the slot where TD-SCDMA transmits P-RACH.,Technique features Special Slots,Dw

4、PTS,GP,UpPTS in LTE TDD keeps compatibility with TD-SCDMA.,Page 8,Technique featuresSC-FDMA&OFDMA,Uplink physical channel processing,Downlink physical channel processing,LTE TDD uses same SC-FDMA&OFDMA scheme as LTE FDD,Page 9,Contents,Standard progressTechnical featuresIndustrialization strategies,

5、Page 10,Industrialization Strategies Spectrum,Candidate spectrum for LTE TDD：2.5/2.3GHz：Licenses have been issued in some countries；bandwidth20MHz per license.1.9/2.0GHz：Most licensed spectrum is idle,bandwidth is 5MHz。,There have been spectrum resources for LTE TDD already.,Page 11,Industrializatio

6、n StrategiesIndustry alliance,Lots of operators and venders are protagonists in the LSTI activities,Page 12,Hot Zone,Continuous urban coverage,Wide area continuous coverage,CN,ScenarioHot zone/spot coveragePartially continuous coverage Small cell,using PICO/Micro eNodeBServiceHigh data rate high tra

7、ffic load 2G/3G traffic compensation,3G/2G,LTE,ScenarioContinuous coverage in urbanCo-locate with 3G/2G sitesServiceUrban trafficHigh data rateVoIP,ScenarioContinuous coverage in wide areaCo-locate with 3G/2GServiceWhole network continuous LTE experience,high speed wireless connections,Industrializa

8、tion StrategiesNetwork setup,LTE TDD is as same flexible for network deployment as LTE FDD,Page 13,Industrialization Strategies Core network,LTE TDD shares the same SAE Gateway with LTE FDD,Page 14,Industrialization Strategies eNodeB,LTE TDD shares same SDR hardware platform as LTE FDD/3G/2G,OFDM mo

9、dulation enables less receiving signal processing load than CDMA;WiFi,WiMAX offers abundant OFDM system experiences;LTE TDD has more processing time due to DL/UL timing switching than LTE FDD;Baseband processors(CPU/DSP/FPGA/ASIC)are becoming more and more powerful;LTE TDD shares same RF modules wit

10、h WiMAX;Prototypes have verified LTE FDD and TDD capabilities in since 2007;,Page 15,Industrialization StrategiesTerminal,Terminal timeline：Test in year 2009Wireless data card in year 20102011Handset in year 20112012Terminal capabilitiesSupport LTE FDD&TDDSupport multimode and multibandSupport VoIPS

11、upport WiFi experience at least,TrialsFunctions，performances,network verifications，IOT,etc.Initial deploymentData card is majority2G/3G is dominant，LTE TDD is supplementMedium scale deploymentLTE multimode handset becoming popular,LTE FDD/TDD dual mode should be supported at first,Page 16,Industrial

12、ization Strategies Chipsets,Low cost baseband and RF multimode multiband chipset is a key for both of LTE TDD&FDD,On Feb.07,2008,Qualcomm announced the MDM9xxx-series chipsets roadmap.The chipsets will support FDD and TDD duplex modes,different carrier bandwidths and will be capable of supporting peak data rates of up to 50 Mbps on the downlink and 25 Mbps on the uplink.,Page 17,HUAWEI wish develop LTE TDD with industry friends together!,HUAWEI contributions Industrialization,Page 18,Thank You,