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IEEE802.16 WMAN - WiBro, WiMAX

IEEE802.16 WMAN - WiBro, WiMAX. 내용의 대부분은 고려대학교 강충구 교수 (ccgkang@korea.ac.kr) 의 2005 년 KRNet 발표자료에서 복사하였음. IEEE802.16. Portable Internet Compared to WLAN More mobility Wider cell size (100m  1Km) Compared to cellular phone Less mobility Higher bandwidth

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IEEE802.16 WMAN - WiBro, WiMAX

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  1. IEEE802.16 WMAN - WiBro, WiMAX 내용의 대부분은 고려대학교 강충구 교수(ccgkang@korea.ac.kr)의 2005년 KRNet 발표자료에서 복사하였음 WPAN WMAN

  2. IEEE802.16 • Portable Internet • Compared to WLAN • More mobility • Wider cell size (100m  1Km) • Compared to cellular phone • Less mobility • Higher bandwidth • Cheaper (Internet only, cheaper BS) MediaLab , Kyunghee University

  3. The IEEE802.16 Protocol Stack WPAN WMAN

  4. The 802.16 Physical Layer (1) The 802.16 transmission environment. WPAN WMAN

  5. The 802.16 Physical Layer (2) • Frames and time slots for time division asymmetric duplexing. WPAN WMAN

  6. Why OFDMA? 고려대 강충구 교수 자료 WPAN WMAN

  7. 802.16 MAC Sublayer Protocol Service Classes • Constant bit rate service • Real-time variable bit rate service • Non-real-time variable bit rate service • Best efforts service WPAN WMAN

  8. The 802.16 Frame Structure (a) A generic frame. (b) A bandwidth request frame. WPAN WMAN

  9. Why scheduling? 고려대 강충구 교수 자료 WPAN WMAN

  10. Scheduling gain 고려대 강충구 교수 자료 WPAN WMAN

  11. System model (1/2) 고려대 강충구 교수 자료 WPAN WMAN

  12. System model (2/2) Coding rate가 낮을 수록 낮은 CINR, 낮은 비트율 k/n 고려대 강충구 교수 자료 WPAN WMAN

  13. Scheduling Service & QoS (1/6) 고려대 강충구 교수 자료 WPAN WMAN

  14. Scheduling Service & QoS (2/6) 고려대 강충구 교수 자료 WPAN WMAN

  15. Scheduling Service & QoS (3/6) 고려대 강충구 교수 자료 WPAN WMAN

  16. Scheduling Service & QoS (4/6) 고려대 강충구 교수 자료 WPAN WMAN

  17. Scheduling Service & QoS (5/6) 고려대 강충구 교수 자료 WPAN WMAN

  18. Scheduling Service & QoS (6/6) 고려대 강충구 교수 자료 WPAN WMAN

  19. Packet scheduling in WiBro 고려대 강충구 교수 자료 WPAN WMAN

  20. Packet scheduling of integrated services Integrated services ≠ ‘intServ’ in IETF 고려대 강충구 교수 자료 WPAN WMAN

  21. Classification of packet scheduling(1/4) 고려대 강충구 교수 자료 * PF: proportional fairness WPAN WMAN

  22. Delay constraint PF Algorithm (2/4) 고려대 강충구 교수 자료 WPAN WMAN

  23. Fairness-constraint Algorithm (3/4) 고려대 강충구 교수 자료 WPAN WMAN

  24. Band AMC mode (1/3) 고려대 강충구 교수 자료 WPAN WMAN

  25. Band AMC mode (2/3) Band별 C/I차이는 고려하지 않는다. 고려대 강충구 교수 자료 WPAN WMAN

  26. Band AMC mode (3/3) 고려대 강충구 교수 자료 WPAN WMAN

  27. Scheduling for Band AMC mode 고려대 강충구 교수 자료 WPAN WMAN

  28. Conclusions • Questions • Are we going to provide QoS guarantee for all different class of services? • Is there any flexible means to trade capacity and fairness? • Who should know how QoS is provided? • Concluding remarks • QoS may be too expensive or too luxurious for the initial stage of WiBro operation. 고려대 강충구 교수 자료 WPAN WMAN

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