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WiMAX Convergence Sublayer Implementation in Embedded Systems

This paper explores the research and implementation of the WiMAX convergence sublayer system on an embedded system. It discusses the IEEE 802.16d MAC layer, QoS in Ethernet, and the architecture and design of the system.

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WiMAX Convergence Sublayer Implementation in Embedded Systems

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  1. WIMAX聚合子層於嵌入式系統下之探討與實現 Speaker: Chao-Sung Yah (葉昭松) Advisor: Dr. Kai-Wei Ke (柯開維 博士) Date: 07/28/2008 The research and implementation of WiMAX convergence sublayer system over an embedded system

  2. OUTLINE • Introduction IEEE 802.16d MAC Layer IEEE 802.16d CS sub-layer • QoS in Ethernet IEEE802.1Q/p Type of Service Diff-Serv • IEEE 802.16d-2004 Convergence Sub-layer Implementation System Architecture Priority design PHS design System over embedded system • Conclusion and Future Work

  3. IEEE 802.16D MAC LAYER • Convergence Sublayer (CS) • Mapping external network data into MAC SDU • Classifying external network SDU • Associating to MAC connection ID • Payload header suppression (PHS) • Common Part Sublayer (CPS) • System access • Bandwidth allocation • Connection establishment • Connection maintenance • Security Sublayer • Authentication • Security key exchange • Encryption

  4. OUTLINE • Introduction IEEE 802.16d MAC Layer IEEE 802.16d CS sub-layer • QoS in Ethernet IEEE802.1Q/p Type of Service Diff-Serv • IEEE 802.16d-2004 Convergence Sub-layer Implementation System Architecture Priority design PHS design System over embedded system • Conclusion and Future Work

  5. IEEE 802.16D CS SUB-LAYER • Asynchronous Transfer Mode (ATM) CS • Packet CS The packet CS is used for transport for all packet-based protocols such as Internet Protocol (IP),Point-to-Point Protocol (PPP), and IEEE Std 802.3 (Ethernet). • Other CSs may be specified in the future

  6. IEEE 802.16D CS SUB-LAYER • Down-link • Classification of the higher-layer protocol PDU • Suppression of payload header information (optional) • Delivery of the resulting CS PDU to the MAC SAP • UP-link • Receipt of the CS PDU from MAC SAP • Rebuilding of any suppressed payload header information (optional)

  7. PAYLOAD HEADER SUPPRESSION (PHS)METHOD

  8. OUTLINE • Introduction IEEE 802.16d MAC Layer IEEE 802.16d CS sub-layer • QoS in Ethernet IEEE802.1Q/p Type of Service Diff-Serv • IEEE 802.16d-2004 Convergence Sub-layer Implementation System Architecture Priority design PHS design System over embedded system • Conclusion and Future Work

  9. IEEE802.1Q/P FIELD

  10. OUTLINE • Introduction IEEE 802.16d MAC Layer IEEE 802.16d CS sub-layer • QoS in Ethernet IEEE802.1Q/p Type of Service Diff-Serv • IEEE 802.16d-2004 Convergence Sub-layer Implementation System Architecture Priority design PHS design System over embedded system • Conclusion and Future Work

  11. TYPE OF SERVICE

  12. OUTLINE • Introduction IEEE 802.16d MAC Layer IEEE 802.16d CS sub-layer • QoS in Ethernet IEEE802.1Q/p Type of Service Diff-Serv • IEEE 802.16d-2004 Convergence Sub-layer Implementation System Architecture Priority design PHS design System over embedded system • Conclusion and Future Work

  13. DIFFERENTIAL SERVICE(DIFFSERV)

  14. DIFFERENTIAL SERVICE CODE POINT Four kind of Per Hop Behavior : • 一、The Default PHB:DCSP value is 000000, Service type is Best Effort Service 。 • 二、Class-Selector PHBs,DSCP value is xxx000,the default Codepoint is also Class-Selector Codepoint 。 • 三、Expedited Forwarding(EF) PHB,low loss ,low delay ,low jitter,bandwidth guarantee , DSCP value is 101110。 • 四、Assured Forwarding (AFxy) PHB ,F4>F3>F2>F1 ,Fx3>Fx2>Fx1

  15. DIFFERENTIAL SERVICE CODE POINT

  16. OUTLINE • Introduction IEEE 802.16d MAC Layer IEEE 802.16d CS sub-layer • QoS in Ethernet IEEE802.1Q/p Type of Service Diff-Serv • IEEE 802.16d-2004 Convergence Sub-layer Implementation System Architecture Priority design PHS design System over embedded system • Conclusion and Future Work

  17. SYSTEM ARCHITECTURE

  18. OUTLINE • Introduction IEEE 802.16d MAC Layer IEEE 802.16d CS sub-layer • QoS in Ethernet IEEE802.1Q/p Type of Service Diff-Serv • IEEE 802.16d-2004 Convergence Sub-layer Implementation System Architecture Priority design PHS design System over embedded system • Conclusion and Future Work

  19. 802.1P PRIORITY AND SERVICE FLOW VALUE DESIGN

  20. TOS/DSCP VALUE DESIGN

  21. DSCP/TOS VALUE DESIGN

  22. DSCP/TOS VALUE DESIGN

  23. DSCP/TOS VALUE DESIGN

  24. DSCP/TOS VALUE DESIGN

  25. WELL-KNOW PORT AND SERVICE FLOW VALUE DESIGN

  26. RTP PAYLOAD TYPE AND SERVICE FLOW VALUE DESIGN

  27. OUTLINE • Introduction IEEE 802.16d MAC Layer IEEE 802.16d CS sub-layer • QoS in Ethernet IEEE802.1Q/p Type of Service Diff-Serv • IEEE 802.16d-2004 Convergence Sub-layer Implementation System Architecture Priority design PHS design System over embedded system • Conclusion and Future Work

  28. PHS

  29. PHS REBUILDED

  30. OUTLINE • Introduction IEEE 802.16d MAC Layer IEEE 802.16d CS sub-layer • QoS in Ethernet IEEE802.1Q/p Type of Service Diff-Serv • IEEE 802.16d-2004 Convergence Sub-layer Implementation System Architecture Priority design PHS design System over embedded system • Conclusion and Future Work

  31. CS over embedded system

  32. OUTLINE • Introduction IEEE 802.16d MAC Layer IEEE 802.16d CS sub-layer • QoS in Ethernet IEEE802.1Q/p Type of Service Diff-Serv • IEEE 802.16d-2004 Convergence Sub-layer Implementation System Architecture Priority design PHS design System over embedded system • Conclusion and Future Work

  33. CONCLUSION • 更聰明與更智慧的分類機制的設計的困難 • 更深入的辨別多媒體封包 • 加強的分辨機制提高對QoS的幫助 • 難以設計與複雜的檔頭壓縮機制

  34. FUTURE WORK • Port Number的完整歸類 • 基於IPv6的分類 • IEEE802.16e-2005的擴充 • 使用者定義的部份

  35. OUTLINE • Introduction IEEE 802.16d MAC Layer IEEE 802.16d CS sub-layer • QoS in Ethernet IEEE802.1Q/p Type of Service Diff-Serv • IEEE 802.16d-2004 Convergence Sub-layer Implementation System Architecture Priority design PHS design System over embedded system • Conclusion and Future Work

  36. DEMO

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