WiMAX Network Infrastructure

WiMAX Network InfrastructureLiu ZhonganTechnical Marketing Broadband Wireless Division Intel Corporation Session ID# PECS002AgendaWiMAX Networking Introduction– What’s it? Who’s defining it? – Services enabledNetwork Architecture Overview– Network Reference Model – Tenets & Requirements – Key elements and featuresInterworking & coexistence– WiMAX and 3G** – WiMAX and Wi-Fi*Third party marks and brands are the property of their respective owners2IntroductionWiMAX Network Architecture: What is It?Systems definition for multiple, interconnected WiMAX base stations providing contiguous coverage Definition service features enabled and interoperability Capabilities and complexity dependent on service definition*Third party marks and brands are the property of their respective owners3Who’s Doing What?Core Networks/ Applications Core IP / Internet NetworksUpper Layer Functions CS MAC 3G* Core Networ kIntroductionMobile Client Functions Upper Layers / IP Stack CS MACWiMAX Forum* NWGMobility Agent CS MAC RAN NetworkIEEE* 802.16/ NETMAN SG.16dPHY PHY.16d/e.16d/ePHYFixed ClientBase StationMobile ClientUpper layer architecture & interface specifications out of scope of IEEE* 802.16*Third party marks and brands are the property of their respective owners4Deployment & Service Scenarios802.16e 802.16-2004Indoor/Outdoor modems Residential Gateways Portable Indoor/Outdoor modems Laptops HHs Laptops HHsFixed Access• Indoor / Outdoor • DSL-like service • No Mobility • VoIP and other appsNomadicity• DSL from different ‘points of attachment’ • No mobility • Limited / No interoperator roaming •VoIP and other appsPortability•Limited mobility • Break-before-make handovers • VoIP – best when stationary • Multi-operator roaming • Interworking w/ Best Effort handoversFull Mobility• Optimized Makebefore-break handovers (latency, QoS, data loss) • Interworking w/ seamless handovers • Optimized low-power operation • VoIP – good stationary or mobile*Third party marks and brands are the property of their respective owners5Usage ModelsFixed 802.16-2004Fixed OutdoorWiFiIntroductionTechnology EvolutionFixed to Portable 802.16eNomadicity/ Portability Fixed IndoorMobile 802.16eMobile DataBackhaul Enterprise Campus PiconetWi-Fi HotspotACCESS 802.16 TechnologyMETROZONE usage models from enables diverse MOBILITYfixed to fully mobile*Third party marks and brands are the property of their respective owners6Networking ApproachesWiMAX as first (last) mile access– Layer 2 access to IP services – Simpler view – Many pre-WiMAX versionsIntroductionWiMAX as fully-defined network– E2E definition of WiMAX networking scenarios and interoperability – More comprehensive view*Third party marks and brands are the property of their respective owners7WiMAX as Access TechnologyIntroductionWiMAX air interface provides last (first) hop access to IP core– Looks like any L2 access technology (e.g., Ethernet) – No special networking definition. Use of offthe-shelf equipment (other than BS) – Existing procedures used for limited mobility management*Third party marks and brands are the property of their respective owners8ExampleIntroduction*Third party marks and brands are the property of their respective owners9Fully Defined WiMAX NetworkIntroductionE2E definition of WiMAX networking Convergence at the IP layer Interface and interwork with existing standards based solutions Approach followed in WiMAX Forum network definition*Third party marks and brands are the property of their respective owners10IntroductionWiMAX network architecture defines the “construction” of 802.16 networks and services from fixed to fully mobile using interoperable components*Third party marks and brands are the property of their respective owners11Network Architecture Overview*Third party marks and brands are the property of their respective owners12ArchitectureWiMAX Forum* Network Working Group Goals– Define end-to-end network architecture specification that accommodates different WiMAX usage scenarios – Address issues outside the scope of 802.16 such as network functional elements and interworking – Enable multi-vendor interoperability135 companies participate in or monitor this activity*Third party marks and brands are the property of their respective owners13Key Architectural ObjectivesAll IP radio access and core networkArchitecture– Based on IEEE* 802.16 and IETF protocolsSupport for all usage models (fixed to fully mobile) Access to incumbent core networks via interworking functions Open interfaces within the RAN, and between the RAN and the core network Support for voice, data and multimedia services Uniform client interface across different geographies and deployments*Third party marks and brands are the property of their respective owners14802.16 Features ExtendedAdvanced QoS Advanced Security Advanced MobilityArchitectureTraffic type QoS with Service Flows, Advanced Scheduling Framework, Adaptive Modulation & Coding, ARQ, H-ARQ EAP authentication, Encryption with AES-CCM, CMAC Authentication mode, X.509 Certificates, Key Binding, Device and User authentication capability Simple Hard Handover, Fast optimized Hard Handover, Fast BS Switching Handover, Soft Handover, Power Management with Sleep and Idle modes*Third party marks and brands are the property of their respective owners15General Architectural Model: Single Service Provider ScenarioArchitectureInternetBSBSIP CorePSTNBSASP*Third party marks and brands are the property of their respective owners16General Architectural Model: Multiple Service Provider ScenarioASP – Application Service Provider M:N NAP – NSP relationship enabling wholesale/unbundled accessArchitectureInternetRadio Access Control/Mngmt.WiMAX Access Network Network Access Provider (NAP)Radio Access Data PlaneNSP Core Network Service Provider (NSP)PSTNFlexible Network Operator Relationships • Supports infrastructure access unbundling from IP connectivity services • Supports Multiple Virtual Network Operator concept*Third party marks and brands are the property of their respective ownersASP17Network Reference Model (NRM)R2 BS (Mobile) Subscriber Station R1 R8 R6 BS R6 HA AAAArchitectureYellow lines represent NRM reference pointsNAPASN GW (FA)R3NSPCSNASNR5 R8 R4 RoamingAnother ASNAnother Operator’s CSNASN – Access Services Network CSN – Core Services Network*Third party marks and brands are the property of their respective owners18Network ElementsArchitectureASN MSSBSCoreInternetASN-GWAir InterfaceShort Distance (e.g., Coax)Backhaul (e.g., Wireless, Fiber)Network internal (e.g., Long-haul)Physically close to ant.At the CO*Third party marks and brands are the property of their respective owners19ASNBS MS BSIP CloudArchitectureASN ASN GWIP CloudWiMAX CSNASN GWASN - Composition of one or more base stations (BS) and ASN gateway (ASN GW) BS implements 802.16 PHY+MAC with an IP backplane BS and ASN GW are connected via an IP cloud Mobility management is tiered– – – Within ASN Between ASNs Between ASN and CSNOther operations enforced in ASN with CSN policy interactions (RRM, low power operation, QoS, AAA)*Third party marks and brands are the property of their respective owners20CSNIP CloudWiMAX ASNInternetProxiesCS domain GatewaysIP ServersInterworking FunctionsIncumbent / Legacy ‘Core’Network y CSN –An IP cloud of interconnected functional entities (NSP closet)y Comprises of one or more of–Proxies/Relays –e.g. AAA, DHCP, DNS–Circuit -switched domain gateways –e.g. PSTN –VoIP gateway –IP Servers –e.g. Location Manager, Policy Manager y IP -based Layer -3 mobility management in CSNCSNArchitectureArchitecture Key Featuresy Securityy AAA and roamingy QoSy Mobility managementSecurity -ArchitectureMSServingBSAAAServerEAPAAA (RADIUS, Diameter) 802.16PKM v2 Authentication802.16 PKM v2Traffic EncryptionBackhaul linkUser credential EAP method(ex: EAP-TLS, EAP-SIM, EAP-AKA)Device and User AuthenticationDevice credential EAP method(ex: EAP-TLS) (Optional)Architecturey Non -Roaming CaseMSSAAA ClientAAA ProxyR1BSASN-GWASNR6AAA ServerCSNR3y Roaming CaseMSSAAA ClientAAA ProxyR1BSASN-GWASNR6AAA Proxy/ServerV-CSNR3AAA ServerH-CSNR5QoS –Data Service Typesy Maximum sustained traffic rate y Traffic priorityDataBEBest -Effort Service Maximum sustained rate y Maximum latency y Jitter toleranceVoIP with silence suppressionERT -VR Extended Real -Time Variable RteServiceQoS specificationsApplications QoS CategoryNRT -VRNon -Real -Time Variable Rate ServiceRT -VRReal -Time Variable Rate ServiceUGSUn -Solicited GrantServicey Minimum reserved rate y Maximum sustained rate y Traffic priorityFTPy Minimum reserved rate y Maximum sustained rate y Maximum Latency Stream Videoy Maximum sustained rate y Maximum latency y Jitter toleranceT1/E1ArchitectureQoS Frameworky End-to-End QoS modelSSAdmissionControlBSLPFLocal PolicyData ASNPFSubscriberDataHome NSPVia R3 & R5R1LocalResource InfoASN-GWAFTriggers QoS RequestsAF: Application Function(e.g., SIP Proxy)PF: Policy FunctionLPF: Local Policy FunctionArchitectureQoS Flow EstablishmentASN-GWSSSF-RequestSF-RequestDSA-Req DSA-RespSF-ResponseSF-ResponseApply Admission Control QoS-RequestQoS-ResponseBSPFAFApply Local policies Apply policies ArchitectureArchitecture Mobility Frameworky Mobile IP based–Proxy mobile IP–Client unaware of MIP–Standard RFC methods implemented in networkonly–Client mobile IP–As per standard RFC–Coexistence–Support for both MIP-aware and other clientsProxy Mobile IP ExampleMSSASN-GW + FADHCPHAH-AAAAccess authenticationAccess authentication (DHCP server @, AAA-Key, HA @)(1) access authentication3) DHCP discover (giaddr)4) DHCP offer (MSS IP@)5) DHCP offer (MSS IP@)6) DHCP Request7) DHCP Request 16) DHCP ack2) DHCP Discover8) DHCP Ack10) MIP Registration Request12a) AccessRequest(HA, auth ID)14) MIP registration ReplyBSSimulated MIP Client 9) MSS PoA 11) MIP Registration Request13b) Access Accept15) MIP Registration ReplyV-AAAAccessauthentication (AAA-key)12b) Access Request(HA, auth ID)13a) Access AcceptArchitectureArchitecture WiMAX network architecture is basedon open interfaces and standard IP protocols. It supports usage modesfrom fixed to fully mobile, and services requiring QoS such as VoIP and multimedia.InterworkingWi-Fi Interworking -Rationaley WiMAX as backhaul to Wi-Fi networks –Ad-hoc Wi-Fi networksy WiMAX/Wi-Fi dual-mode usage–Wi-Fi penetration indoors is expected to be pervasive–WiMAX coverage indoors requires morepower/smaller cells (higher overhead)Air InterfaceMSS (Wi-Fi-WiMAX)APWiMAX/Wi -Fi Interworkingy Automatic switching between Wi -Fi and WiMAX y Roaming only, or active session handoverASN-GW (FA /Proxy MIP MN)APSwitchIP routerWiMAX BSWiMAX BSInternetIP RouterCoreAAAWiMAX-3G* Interworkingy Rationale–WiMAX used as data overlay complimenting 3G voicey Loose coupling–Single subscription–Roaming between WiMAX and 3G networks y Tight coupling–Active session handoverAir InterfaceBTS3GPP2* Overlayy Loosely coupled Interworking –New WiMAX Radio Access Network integrated with legacy IP -based 3G coreASN-GW (FA /Proxy MIP MN)BTSBSCPDSN (FA)WiMAX BSWiMAX BSInternetIP Router3GPP2 CoreHSSAir InterfaceSS (WiMAX)DSL CPEWireline Broadband Integrationy ‘IP ’Interworking –Attach to IP core, avoid ATM, PPP implicationsEthernet SwitchDSL CPEDSLAMBRAS Or ATM TerminationWiMAX BSWiMAX BSInternetIP RouterDSL Metropolitan NetworkDNS, DHCP,AAAR1Summaryy WiMAX network architecture defines the “construction”of 802.16 networks and services from fixed to fully mobile using interoperable componentsy It is based on open interfaces and standard IP protocols. It supports services requiring QoS such as VoIP and multimedia.y Interworking with Wi-Fi and 3G* defined to support different business needsy Relevant Sessions:–Wireless–WiMAXCertified Wireless USB from the USB -IF: First Hi -Speed WPANPTRS003Intel Technology and Research WiMAX as a Mobile Wireless Broadband SolutionPECS001Next Generation Embedded Platform and Communication InfrastructureEnabling Platform Mobility Across Wireless NetworksSTD S003Technology StandardsMobile Terminal Security and Manageability Architecture for Pervasive Wireless services XSCS002Develop Software Applications for Intel Xscale ®Based Mobile TerminalsSession TitleS ession id#TrackWiMAX as a Mobile Wireless Broadband SolutionPECS001Next Generation Embedded Platform and Communication InfrastructureSession TitleS ession id#Tracky Relevant Showcases:A16WiMAX DemoBooth #Demo TitleSee you in 2006 PRC IDF2006 PRC IDF 再相会！y Beijing: April 18-19, 20062006年4月18日-19日，北京y Shenzhen: May 23-24, 20062006年5月23日-24日，深圳y Shanghai: November 9-10, 20062006年11月9日-10日，上海Please refer to IDF website for updated information.请随时浏览英特尔信息技术峰会网站，获取最新会议信息Please fill out the Session Evaluation Form.Thank You!。