【正文】 Radio Access PlaneWiMAX CPE, BS and ASN GW (16e) PHY MACEtherGateway RouterServiceCLI / SNMPAgent () WiMAX BS WiMAX ASN Gatewayand AuthenticatorEAPWiMAX CPEPKMv2CLI: Existed Tech : Developed in 2023 : Chipset providerPKMv2PKMv1RRM HandoverEtherRADIUSAAA ServerIPEAP MethodGRE/IP TunnelDP CtrlSFMRRAPaging AgentHandover FnContext FnAuth RelayGRE/IP TunnelDP CtrlSFARRMPaging ControlIntra ASN MobilityContext FnAuth RelayEAP PHYEAP MethodR1R2 Transport Protocol Transport ProtocolRADIUSEtherR6 R318 NDSLab Copyright2023Outline? 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 WiMAX19 NDSLab Copyright2023Future Technologies in WiMAX? Multihop Relay– Aiming at developing relay based on , to gain:? Coverage extension, and? Throughput enhancement– Scope? To specify OFDMA PHY and MAC enhancement to IEEE Std. for licensed bands to enable the operation of relay stations? Subscriber station specifications are not changed? Next Generation WiMAX2– Advanced Air Interface for BWA in the future? Moving towards 4G– Scope: ? To amend the IEEE WirelessMANOFDMA to provide an advanced air interface for operation in licensed bands ? To meet the cellular layer requirements of IMTAdvanced next generation mobile works? To provide continuing support for legacy WirelessMANOFDMA equipment20 NDSLab Copyright2023Copyright 169。 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。Costeffective167。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。Wireless Transmission167。 NDSL, Chang Gung University. Permission required for reproduction or display.WiMAX技術(shù)發(fā)展趨勢 :過去、現(xiàn)在與未來Outline? Background? IEEE Standardization and WiMAX