802.16 Standard Air Interface for Fixed Broadband Wireless Access Systems

1. 802.16Standard Air Interface for FixedBroadband Wireless Access Systems Ermanno Pietrosemoli Latin American Networking School www.eslared.org Universidad de los Andes Mérida- Venezuela ermanno@ula.ve

5. P802.16: air interface (MAC and PHY for 10~66 GHz) • P802.16a: 2 ~ 11 GHz • P802.16b: Extension for 2 ~ 11 GHz

6. MAN Pt-Mp • Base Station connected to the public Network • Feeds Subscriber stations (SS) • Both Types of BS • SS Serves a building • Multiple services with QoS

7. General Features • Wideband Channels (20~28 MHz) • Múltiple Access, TDM/TDMA • Adaptive both Upstream and Downstream • TDD, FDD o Half Duplex

8. Burst Adaptive Profile • (Burst Profile) • Modulation and FEC • Dynamically assigned according to the conditions of the link : Capacity and robustness interchange • SS features are known at the time of the link

9. Duplexing Techniques • Downlink a burst is provided at every SS • Uplink every SS is provided with a variable length time slot

11. Duplexing • TDD • Shared RF Channel for uplink and downlink • Dynamic Assimmetry • SS cost reduction • FDD • Static assymetry • Half Duplex is still low cost

13. TDD

14. FDDD Frames

15. Transmission Rates

21. Extension to < 11 GHz • OFD Support • ARQ • 802.16b Mesh Mode • Optional Topology • Subscriber to Subscriber

22. BRAN de ETSI • HIPERACCES • > 11 GHz • Earlier development, but IEEE finished first • HIPERMAN • < 11 GHz • IEEE finished first • Cooperation, 802.16 as base

25. I

26. Thanks for your attention