WiMax - Technology & Architecture

Academic Research Presentation on WiMAX Technology and its network architecture

1. 6302 – Advanced Wireless Communication Dr. Mequanint Moges Wi-MAX – Technology & Architecture Presented By: Syed Ashar Zia

2. Objectives What is Wi-MAX? Specifications of IEEE 802.16 standard Revisions of standard Operating frequencies MAC & PHY layers Data-Rate and throughput WiMAX Network Architecture Components of the network References & Conclusion 11/22/2009 By: SYED ASHAR ZIA

3. Wireless Network Standards 11/22/2009 By: SYED ASHAR ZIA

4. WiMAX Promises 11/22/2009 By: SYED ASHAR ZIA

5. Introduction - WiMAX 11/22/2009 By: SYED ASHAR ZIA

6. Use of WiMAX Fig: WiMAX Accessibility (Adapted from www.mirentech.co.uk) 11/22/2009 By: SYED ASHAR ZIA

7. Types of Subscribers 11/22/2009 By: SYED ASHAR ZIA

8. Network Speed 11/22/2009 By: SYED ASHAR ZIA According to the standards, WiMAX can support up to a 75 Mbps data rate (single channel) and cover up to 30 miles. It has a throughput that is much higher than Wi-Fi and current cellular 2G and 3G networks. For a channel size of 20 MHz, WiMAX can support a sector data rate of about 11 Mbps on the downlink and 1.36 Mbps on the uplink .

9. Services 11/22/2009 By: SYED ASHAR ZIA WiMAX supports the Quad-Play Entertainment. Quad-Play includes: Broadband Cable TV Landline Mobile Phones Most commonly provided services with WiMAX are broadband and VoIP. Cable TV is not offered by most of the WiMAX Operators.

10. Operating Frequencies 11/22/2009 By: SYED ASHAR ZIA 10 – 66 GHz frequency ranges are used for LOS point-to-point links . 2 to 11 GHz spectrum was introduced for point-to-multipoint and NLOS links.

11. Channel Bandwidth 11/22/2009 By: SYED ASHAR ZIA WiMAX profiles define 4 standard bandwidths which are 3.5 MHz, 5 MHz, 7 MHz and 10 MHz.

12. MAC & PHY Layers 11/22/2009 By: SYED ASHAR ZIA PHY layer: SC OFDM OFDMA MAC Layer: Security Sub-Layer Common Part Sub-Layer Convergence Layer Convergence layer offers interoperability among different types of networks.

13. Antenna Systems 11/22/2009 By: SYED ASHAR ZIA Uses MIMO (Multiple Input and Multiple Output) antenna systems. Adaptive Modulation technique is used based on radio condition. Signals are modulated according to the radio conditions. Best Conditions – 64 QAM Worst Conditions – BPSK Parameters used to diagnose radio conditions are: CINR – Carrier to Interference of Noise Ratio (SNR). RSSI – Received Signal Strength Indicator.

14. WiMAX Architecture Fig: WiMAX Network Architecture (Adapted from www.tutorialspoint.com) 11/22/2009 BY: SYED ASHAR ZIA

15. Subscriber Equipments (SS/MS) 11/22/2009 By: SYED ASHAR ZIA WiMAX Outdoor CPE

16. ASN – Access Service Network 11/22/2009 By: SYED ASHAR ZIA

17. Access Service Network (Contd.) 11/22/2009 By: SYED ASHAR ZIA Three components only: EMS – Element Management System Base Station or WiMAX Access Point (AP) ASN Gateway – Links ASN to CSN ASN provides radio connection for the subscriber (MS) ASN is responsible of: Radio Resource Management. Mobility Management. Handover control. EMS is database used for routing the traffic to desired server in CSN

18. CSN – Connectivity Service Network 11/22/2009 By: SYED ASHAR ZIA

19. Connectivity Service Network (Contd.) 11/22/2009 By: SYED ASHAR ZIA CSN is responsible for subscribers IP connectivity. Components in CSN are: AAA Server: Authentication, Authorization and Accounting. Manages CPE authentication. Provide the network with profile information of each subscriber. DNS Server: Domain Name Server. Translates the Domain Names into IP Addresses.

20. Connectivity Service Network (Contd.) 11/22/2009 By: SYED ASHAR ZIA DHCP Server: Dynamic Host Configuration Protocol Server. Provides IP to entities in network (including Subscribers) dynamically. DHCP allows IPs to be assigned automatically to the computer. Home Agent (HA): Special routers that work to provide a data “ tunnel”. Gateways: VoIP and Data gateways for connectivity outside CSN.

21. NSP – Network Service Provider 11/22/2009 By: SYED ASHAR ZIA

22. Network Service Provider (Contd.) 11/22/2009 By: SYED ASHAR ZIA NSP network provides all the services and features which are offered by the carrier/operator. Services may include: Voice over IP. Streaming audio & video programs. Internet access. E-Mail. Instant Messaging. Access to databases. These services are completely independent of WiMAX access network.

23. THE END Questions? 11/22/2009 BY: SYED ASHAR ZIA

24. THANK YOU 11/22/2009 BY: SYED ASHAR ZIA