臺灣博碩士論文加值系統

近十幾年來，寬頻無線網路發展是為了讓使用者能夠無所不在的使用寬頻網路的服務，為了達到能夠隨時隨地使用寬頻網路，行動裝置的電量消耗也是一個重要的問題。
本論文提出一個在上行鏈路方向的排程方法，不僅考慮到不同服務類型的服務品質要求，並且把電力消耗的問題也一併考慮。在上行鏈路方向(uplink)與下行鏈路(downlink)不同的地方在於uplink在BS分配頻寬的時候並不是即時性的了解MS目前的需求資訊，造成在封包排程的機制設計上的困難。MS會先提出頻寬需求給BS，而BS會根據目前所擁有的頻寬分配給每條連線，並在UL-MAP分配頻寬給每個MS。
因此，本論文在WiMax網路的環境下，將rtPS和nrtPS這兩種不同的服務類型設計不同的排程方式和睡眠模式，並且在模擬時與目前WiMax標準所制訂的方法做比較，本論文所提出的方法在不同的網路流量的情形下能達到比較好的睡眠效率同時也能夠滿足服務品質的要求。

In recent years, broadband wireless access (BWA) networks have been rapidly evolved to satisfy the increasing demands of users for ubiquitous and seamless access to various kinds of services. In order to achieve anytime, anywhere, and longer non-stop access to broadband networks through mobile devices with limited power, the power saving is a critical issue toward this objective.
Based on the basic sleeping mode concept, this thesis proposes a power saving centric scheduling scheme for uplink traffic while taking the quality of service (QoS) as a constraint requirements. The uplink resource allocation is quite different from that of the downlink resource allocation scheme, because the uplink traffic is queued at the mobile stations (MS) side and base station (BS) has no information about it and cannot allocate radio resource properly. MS will raise bandwidth request (BR) to BS, the BS according to radio resource to allocate bandwidth to each connection after receive BR, and bandwidth allocation in the UL-MAP to each MS.
In this thesis both of the rtPS and nrtPS service types are studies. These two service types have different QoS requirement and, therefore, have different design in their sleeping arrangement and scheduling policy. The simulation results are compared with the standard sleeping approach of the WiMax network. The simulation results show that the proposed scheme achieves better sleep efficiency than the standard scheme and can also satisfy the QoS requirements.

摘要 I
ABSTRACT II
誌謝 III
目錄 IV
第一章 緒論 - 1 -
1-1 研究背景 - 1 -
1-2 研究動機與目的 - 1 -
1-3 章節概要 - 2 -
第二章 相關研究背景 - 3 -
2-1 WIMAX 無線網路基本介紹 - 3 -
2-1-1 FRAME架構 - 4 -
2-2 WIMAX MAC 層 - 5 -
2-2-1 IEEE 802.16 排程服務 - 5 -
2-2-2 頻寬請求機制(Bandwidth Request) - 8 -
2-2-3 Polling - 9 -
2-3 802.16睡眠模式 - 10 -
2-4 相關文獻 - 12 -
第三章 研究方法 - 14 -
3-1 WIMAX標準方法 - 14 -
3-1-1 WiMax標準分配rtPS頻寬方法 - 15 -
3-1-2 WiMax標準分配nrtPS頻寬方法 - 17 -
3-1-3 WiMax標準睡眠模式 - 18 -
3-2 系統架構 - 18 -
3-2 RTPS分配頻寬演算法 - 20 -
3-3 NRTPS頻寬分配演算法 - 22 -
3-4 加入PREEMPTION方法 - 23 -
3-5 SLEEP CYCLE MANAGEMENT - 24 -
第四章 模擬結果與討論 - 25 -
4-1 模擬環境 - 25 -
4-2 模擬結果分析 - 28 -
第五章 結論與未來工作 - 42 -
參考文獻 - 43 -

[1]”IEEE P802.16-2009” , IEEE Maintenance Task Group.
[2]“IEEE Std 802.16-2004” , IEEE Computer Society, IEEE Microwave Theory and Techniques Society, IEEE Standard, 1 October 2004.
[3]“Mobile WiMAX – Part 1: A Technical Overview and Performance Evaluation,” WiMAX Forum and WiMAX Forum CERTIFIED, August 2006.
[4]Shiao-Li Tsao , You-Lin Chen, “Energy-efficient packet scheduling algorithms for real-time communications in a mobile WiMAX system,” Computer Communications,Volume 31, Issue 10, pp. 2350-2359,25 June 2008.
[5]Shih-Chang Huang, Chien Chen, Rong-Hong Jan, and Cheng-Chung Hsieh, “An energy-efficient scheduling for multiple MSSs in IEEE 802.16e broadband wireless networks,” IEEE International Symposium on Personal, Indoor and Mobile Radio Communications, pp.1-5,Sep. 2008
[6]Jing Wu, Jeonghoon Mo, Ting Wang ─”A Method for Non-Real-Time Polling Service in IEEE 802.16 Wireless Access Networks,”Vehicular Technology Conference, pp. 1518 – 1522,Oct. 2007.
[7]Y. Xiao, ”Energy saving mechanism in the IEEE 802.16e wireless MAN,” IEEE Communications Letters, vol 9, pp. 595-597, July 2005.
[8]Y. Zhang and M. Fujise, ”Energy management in the IEEE 802.16e MAC,” IEEE Communications Letters, vol 10, pp. 311-313, April 2006.
[9]Shih-Chang Huang, Chien Chen, Rong-Hong Jan, and Cheng-Chung Hsieh, “Energy efficient scheduling with QoS guarantee for IEEE 802.16e broadband wireless access networks,” In proceeding of International Wireless Communications and Mobile Computing Conference (IWCMC 2007), pp. 547-552, August 2007.
[10]Shih-Chang Huang, Chien Chen, Rong-Hong Jan, and Cheng-Chung Hsieh, “Energy efficient scheduling with QoS guarantee for IEEE 802.16e broadband wireless access networks,” In proceeding of International Wireless Communications and Mobile Computing Conference (IWCMC 2007), pp. 547-552, August 2007.
[11]WiMAX Forum Application AWGN Working Group. “WiMAX System Evaluation Methodology ,” September 2007.