【正文】 NDSL, Chang Gung University. Permission required for reproduction or display.演講完畢，謝謝觀看！。Larger coverageWLANWLAN143Source: “Korea 4G RD and Standardization”, LGE, 2023 IMTAdvanced4G 2WiBro a/dVoiceMultimediaNew Life StyleData RateMobilityITU WP5D43 NDSLab Copyright2023Expected 4G Features ? In addition to the development of a total new system, 4G work should integrate the existing system? From users’ viewpoint– High usability? Anytime, anywhere with any technologies– Support multimedia services at low cost? In addition to telem and datam– Personalization? Users in different location, occupation, and economic classes– Integrated services? Multiple services from multiple providers44 NDSLab Copyright2023QuestionsThank You for Your Attention45 NDSLab Copyright2023Copyright 169。Costeffective167。Ubiquitous munication 167。1Gbps(Fixed, Nomadic)167。Wireless Transmission167。 NDSL, Chang Gung University. Permission required for reproduction or display.IEEE Multihop RelayBenefits of Using RelayBSL?RSRSRSRSLoad sharing and multipath redundancy: reduces infrastructure costs!RSSpectrally efficient architectures: reduces costly antenna structures!RSDecreased Mobile Station power per bit transmitted and received: increases MS battery life!RSFlexible cell site placement: speeds deployment, reduces site acquisition and backhaul costs! RSRSRSBut, issues to be resolved– Latency and overhead increase with each hop– Infrastructure plexity– Interference still limits performanceSource: Intel, 2023 22 NDSLab Copyright2023? cost(total) ? Nuser*cost( ) + cost(system)? cost(system) ? NBS *(cost( ) + cost( to BS)) + other( ) NBS ?Wuser = average user capacity to produce service Wsystem = maximum capacity per base stationRmax = maximum base station cell radiusCost of Mobile SystemsNote: cost = PV(CAPEX) + PV(OPEX) Keys to lower the infrastructure cost23 NDSLab Copyright2023Topics and Categories in 16j1. Frame Structure2. Network Entry3. Security 4. BW request5. Mobility Management6. Routing, Path, Connection and Service Flow Managements7. Construction transmission of MAC PDUs8. HARQ9. Measurement reporting, Scheduling Interference control MAC24 NDSLab Copyright2023Copyright 169。參與插拔大會的廠商在取得產(chǎn)品的基本互通功能驗證後， WiMAX論壇即會頒予參與測試的設備供應廠商通過互通驗證的活動標章，廠商可將其列於行銷文宣中進行宣傳。Copyright 169。 NDSL, Chang Gung University. Permission required for reproduction or display.WiMAX技術發(fā)展趨勢 :過去、現(xiàn)在與未來Outline? Background? IEEE Standardization and WiMAX Forum? WiMAX Systems Protocols Overview? Introduction to IEEE IEEE – Usage models– Work plane and documents– Requirements evaluation methodology– Network architecture reference model? Advanced features challenges of IEEE ? Next Wave Technologies in WiMAX2 NDSLab Copyright2023Wireless Standards? 4 main usage segments are specified– Range, Power, …Source：拓墣產(chǎn)業(yè)研究所， WII3 NDSLab Copyright2023WiMAX on the Path of Fixed/Mobile ConvergenceFixedMobileWill Convergence WiFi WCDMA (WiMAX)Spectrum , (Unlicensed) Around 2GHz (Licensed)2~11, 10~66 GHz(Licensed, Unlicensed)Channel Access Contentionbased Scheduled ScheduledBit Rate Up to 54Mbps Up to 2Mbps Up to 75 MbpsMobility Fixed, Portable Mobile Fixed, Portable, MobileModulation Scheme CDMA, OFDM CDMA OFDM, OFDMATypical Communication Range100s meters 10s kilometers 10s kilometers4 NDSLab Copyright2023Deployment of WiMAX ServiceSource: WiMAX Forum/Siemens? Backhaul Feeding– Pointtopoint link for fixed infrastructure? Fixed Wireless Access– Wireless local loop for hotspot feeding? Nomadic Access– CPEs in hotzone access the service directly? Portable/Mobile Access– Handover function enabling mobile data feeding5 NDSLab Copyright2023Why WiMAX?Even having Sprint win, WiMAX is still a midterm to longterm technology6 NDSLab Copyright2023Outline? Background? IEEE Standardization and WiMAX Forum? WiMAX Sy