Wi Max Network Architecture V0.1 Pdf Version


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Wi Max Network Architecture V0.1 Pdf Version

  1. 1. Understanding WiMAX Network Architecture BP Tiwari beyond4g.org 1
  2. 2. Presentation Outline  Architecture Drivers and Trends  WiMAX Network Reference Architecture  WiMAX Profiles  Deployment Strategies – Fixed /Mobile – HSI and Enterprise Modles – Voip – Video Delivery Beyond 4G 2 WIMAX Network Architecture
  3. 3. Customer and Industry Trend  Broadband like experiance  Should enable rich end devices  Affordable & Easy to Use  Should enable media-rich content  Open internet model Beyond 4G 3 WIMAX Network Architecture
  4. 4. Trends towards 4G Network Architecture Flatter & all-IP  Reduced Latency  CAPEX Reduction  Simple to manage networks  Suitable for multimedia  Optimizations due to knowledge in one platform XX XX R6 R6 XX XX XX R6 R6 R8 R8 Current Wireless Hierarchical Model WiMAX or Evolving 4G Modles Beyond 4G 4 WIMAX Network Architecture
  5. 5. WiMAX Network Reference Points R8 R4 R8 Beyond 4G 5 WIMAX Network Architecture
  6. 6. WiMAX Network Architecture Beyond 4G 6 WIMAX Network Architecture
  7. 7. WiMAX ASN  Customer Premises Equipment – Mobile Subscriber (Handheld, PDA, PCMCIA) – Residential Gateways  Base Station – 802.16e compliant (Time Duplex Division, – Adaptive Antenna System, Scalable Orthogonal Frequency Division Multiple Access)  WiMAX Access Controller or ASN-GW – Security and Authentication – Accounting : interfaces the AAA server – Traffic Routing interfaces the Core – Mobility : interfaces the HA during handover process  Network management for BS and ASN-GW – NE configuration, Software management, – Network supervision, OSS interfaces Beyond 4G 7 WIMAX Network Architecture
  8. 8. ASN Profiles Profile Key Features Hierarchical model, with more intelligence located at the ASN Gateway. The ASN Gateway is involved in the Radio Resource A Management (RMM) and hosts the Radio Resource Controller (RRC). It also handles handoffs between BSUs. Open interfaces: R1, R3, R4, R6. Vendor-specific model with proprietary and closed R6 interface between BS and ASN-Gateway. BSs playing a more substantial role in managing B traffic and mobility while the ASN network acts as a black box. Open interfaces: R1, R3, R4. Centralized model similar to A, but BSUs are responsible for all the RRM, including the RRC and C Radio Resource Agent (RRA), and the handoffs between BSUs. Open interfaces: R1, R3, R4, R6. Beyond 4G 8 8 WIMAX Network Architecture
  9. 9. WiMAX CSN  Home Agent – For the control of the mobility  Domain Name Server / DHCP – Translation of domain name into IP addresses Charging OSS Systems – IP addresses allocation AAA and Billing  AAA Server – For authentication, authorization and accounting DNS-DHCP  Firewall/NAT – Mapping of IP addresses from DHCP/DSN one group to another ( private / public transparent to end- CSN users.  OSS Systems – Customer provisioning ,CRM – Network monitoring and troubleshooting  BSS systems – Charging , billing formatting etc Beyond 4G 9 WIMAX Network Architecture
  10. 10. ASN Gateway in 802.16e WiMAX Networks  ASN Gateway required for all 802.16e networks – Fixed, Nomadic, Portable, Mobile  Subscriber Management – Facilitates Address Assignment (DCHP proxy, PMIP) – Authentication (EAP-based authenticator) – Service Flow Authorization and Creation – Accounting (Prepaid, Postpaid)  Mobility – MIP Foreign Agent – Inter & Intra-ASN handovers – Paging/Idle Mode  Network Optimization – Load Balancing – Seamless Handover support Beyond 4G 10 WIMAX Network Architecture
  11. 11. Home Agent in 802.16e WiMAX Networks  Home Agent is required for Mobile 802.16e Networks (macro mobility)  Mobility – Home Agent provides an anchor point for subscriber stations, enabling inter-ASN mobility – Works in conjunction with the Mobile IP Foreign Agent, located in the ASN Gateway, to register and track subscriber stations – When a subscriber station moves to a different ASN, the Home Agent intercepts traffic destined for the subscriber station and tunnels that traffic to the appropriate ASN Gateway/Foreign Agent – Subscriber Stations can maintain same IP address as they move about network  IP Addressing – The Home Agent provides IP address assignment for subscriber stations in conjunction with the Proxy Mobile IP (PMIP) and DHCP proxy function in the ASN Gateway Beyond 4G 11 WIMAX Network Architecture
  12. 12. AAA Server in 8016.e WiMAX Networks  AAA Server required for all 802.16e Networks  Authentication – Key Management and Subscriber Authentication using EAP-based methods  Accounting – Aggregation of accounting information, export CDRs to billing servers – Prepaid accounting & hotlining  Policy (NWG Release 1) – QoS Profiles for Subscribers (NWG Release 1)  Addressing – Home Agent address to use for Subscriber Stations – Optionally directly provide IP address for Subscriber Stations or DHCP server Beyond 4G 12 WIMAX Network Architecture
  13. 13. WiMAX Releases MobileWiMAX 1 WiMAX Release 1 WiMAX 2 Network R1.0 Features Network R1.5 Features Network R1.6 Features (to be Network Release 2 (Completed) completed by 1Q2 010) Features (Completed) ● IPv6 ● ASN anchored mobility, ● Persistent scheduling for ● Femtocell (to be completed by 3ASN profiles reduced MAC OH 1Q2011) ● CSN anchored mobility ● ETS ● Seamless handover ● Reduced Latency ● (CMIP, PMIP) ● Load Balancing ● Multi-hop relays ● IPv4 & optional IPv6 ● Services ● Self-organizing capability Connectivity ● GPS & non-GPS Location (SON) ● Idle mode and paging based services ● Services ● EAP-based authentication ● Enhanced Multicast & ● Enhanced VoIP support ● DSL, 3GPP and 3GPP2 Broadcast services ● Enhanced MBS (both static Interworking ● WiMAX-WiFi-Bluetooth and dynamic multicasting) ● Services coexistence ● Enhancements to LBS ● Mobile, portable, nomadic, ● Ethernet services fixed ● Mobility: up to 500 km/hr ● Public Safety & emergency ● Pre-provisioned/static QoS services ● Pre- and Post-paid RADIUS O & M Features Accounting ● OTA pre-provisioning & device ● Roaming (RADIUS only) management ● O&M Features ● Network discovery/selection Source: WiMAX Forum Beyond 4G 13 13 WIMAX Network Architecture
  14. 14. High Speed Internet Architecture Radius Beyond 4G 14 WIMAX Network Architecture
  15. 15. Voip Architecture Radius Requested for dynamic set-up of WiMAX bearers (eg VoIP, Video with QoS) Support SIP/RTSP-based services PSTN/PLMN PSTN/PLMN Beyond 4G 15 WIMAX Network Architecture
  16. 16. Location Based Services R8 U1 R8 8 R LS: Location Server LC: Location Controller LA: Location Agent Beyond 4G 16 WIMAX Network Architecture
  17. 17. MVNO/Wholesale Model R8 R8 Wireless Core Considerations R8 • Multiple AAA/HA support • Statistics per ISP/NSP • Policing Bandwidth by ISP/NSP • Support for overlapping IP address spaces • Simple IP & Mobile IP Support • Proxy AAA support Beyond 4G 17 WIMAX Network Architecture
  18. 18. Enterprise based Services in WiMAX R R USER CPE PE MPLS PE CE USER BS ASN - GW/ IP IP ETH / ETH / ETH / ETH / 802.1d 802.1q 802.1q 802.1d PHY PHY Eth-CS Eth-CS GRE GRE PHY PHY MPLS MPLS PHY PHY PHY 802.16 802.16 IP IP PHY PHY ETH ETH The L2 information including VLAN tag is passed through the network. CEs on both side add/release VLAN tagPHYL2. PHY on PE add/release MPLS label. Beyond 4G 18 WIMAX Network Architecture
  19. 19. End to End QoS for Enterprise customers WiMAX allows efficient delivery of QoS for enterprise customers Beyond 4G 19 WIMAX Network Architecture
  20. 20. WiMAX Applications Classes Loss Application Bandwidth Latency Jitter (Packet Error Rate) ~5 sec (jitter Can tolerate Video Streaming 0.1 - 10 Mbps Medium buffer size) some loss ~5 sec (jitter Can tolerate Audio Streaming 20-320 Kbps Medium buffer size) some loss Medium-Low E-Mail No restriction Medium N/A (uses TCP) Gaming Low (50 kbps) Low < 25 msec N/A Low Medium-Low Web Browsing 10 kbps to 2 Mbps N/A N/A (uses TCP) Setup time <1 sec; Can tolerate Push-to-Talk Low (~10kbps) Low (~20 ms) Bearer ~200 ms some loss -2 VoIP 32-64 kbps Low < 160 msec < 50 ms Low (10 ) Beyond 4G 20 WIMAX Network Architecture
  21. 21. Thanks Beyond 4G 21 WIMAX Network Architecture