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研究生:申其偉
研究生(外文):Chi-Wei Shen
論文名稱:在IEEE802.16網狀網路下對於傳輸時間選擇的優化之研究
論文名稱(外文):Study on Optimization for Transmission Timing in IEEE 802.16 Mesh Networks
指導教授:黎碧煌
指導教授(外文):Bih-Hwang Lee
學位類別:碩士
校院名稱:國立臺灣科技大學
系所名稱:電機工程系
學門:工程學門
學類:電資工程學類
論文種類:學術論文
論文出版年:2008
畢業學年度:96
語文別:英文
論文頁數:39
中文關鍵詞:802.16網狀網路協同分散式排程傳輸時間
外文關鍵詞:802.16mesh networkscoordinated distributed schedulingtransmission timing
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IEEE 802.16標準是一個定義寬頻無線都會網路的新興存取技術。它制訂了兩種型態的網路,一個是點對多點,另一種是網狀網路。在網狀網路下,又分別有三種不同的排程機制:協同集中式、協同分散式以及非協同分散式。顯而易見的,排程機制的效能評估與優化一直是主要的探討課題。
此篇論文主要是針對在傳輸時間的選擇原則方法下,以其中所發生的碰撞機率以及平均重複競爭的傳送機會時槽,來做比較與相互對照。同時,我們探討在使用隨機選擇演算法的協同分散式網狀網路裡面,所隱藏的碰撞問題。之後,我們提出了一個能夠強化網狀網路選擇流程的優化系統。模擬的結果展現出我們所提出的解決方法,在減少碰撞發生的目標上,表現的比之前提出的方法有明顯的增進。
另外,本篇論文的目的也試著在多節點的網路環境下,研究一套能有效設置參數的配置環境,以期能減少不必要的浪費在控制訊號的開銷成本上,進而提供一個有效率的處理方法。根據此一論點,我們在最後也將指出網狀網路應用上的較佳參數配置。
IEEE 802.16 standard is an emerging technology defined for broadband wireless metropolitan area networks. It specifies two types of network, point-to-multipoint and mesh modes. In the mesh networks, three kinds of scheduling mechanisms are supported : coordinated centralized, coordinated distributed and uncoordinated distributed. Definitely, the performance evaluation and optimization of scheduling scheme is always the mojor topic.
In this thesis, the research aims to compare and contrast collision probability, average repeated competing transmission opportunities in election base transmission timing. We investigate the potential problem of collision probability in a coordinated distributed mesh network employed by a random election algorithm. At that point, we propose an optimization modeling to improve the mesh election procedure. The simulation results reveal that our proposed solution performs better than the previous method.
Furthermore, the objective of this paper is also to find a set of parameter value regarding XmtHoldoffExponent in the two hop neighborhood network that minimizes the control subframe overhead and provides an efficient method. Therefore, we identify and point out the better parameters setting in such mesh networks.
Abstract iv
中文摘要 v
誌謝 vi
Table of Contents vii
List of Figures viii
List of Tables ix
Chapter 1 Introduction 1
1.1 Transmission Timing Optimization 1
1.2 Research Motivation 2
1.3 Thesis Organization 3
Chapter 2 Background and Related Works 4
2.1 IEEE 802.16 Standard Overview 4
2.2 IEEE 802.16 Mesh Mode Operations 9
2.3 Coordinated Distributed Scheduling Algorithm 12
2.4 Related Works 15
Chapter 3 Propose Optimization Scheme 16
3.1 Overview and Concept 16
3.2 Extensions Election Base Transmission Timing 20
3.3 Optimization Election Base Transmission Timing 21
Chapter 4 Simulations and Discussions 25
4.1 Simulation Environment 25
4.2 Simulation Methodology 26
4.3 Collision Probability 28
4.4 Average Repeated Competing Opportunities 31
4.5 Access Delay 34
Chapter 5 Conclusions and Future Works 36
References 38
[1] IEEE Computer Society and IEEE Microwave Theory and Techniques Society, “IEEE Standard for Local and Metropolitan Area Networks, Part 16: Air Interface for Fixed Broadband Wireless Access Systems,” IEEE Std. 802.16-2004, Oct. 2004.
[2] “IEEE Standard for Local and metropolitan area networks: Part 16: Air Interface for Fixed Broadband Wireless Access Systems. Amendment 2: Physical and Medium Access Control Layers for Combined Fixed and Mobile Operation in Licensed Bands,” IEEE Std. 802.16e-2005 and IEEE Std. 802.16-2004/Cor1-2005.
[3] WiMAX Forum White Paper, “Mobile WiMAX - Part I: A Technical Overview and Performance Evaluation,” Aug. 2006. http://www.wimaxforum.org
[4] WiMAX Forum, “WiMAX End-to-End Network Systems Architecture, Stage 2: Architecture Tenets, Reference Model and Reference Points,” Aug. 2006. http://www.wimaxforum.org
[5] T. Jiang, W. Xiang, H. Chen, Q. Ni, “Multicast Broadcast Services Support in OFDMA-Based WiMAX Systems,” IEEE Communication Mag., vol. 45, no. 8, pp.78-86, Aug. 2007.
[6] C. Cicconetti, C. Eklund, L. Lenzini, and E. Mingozzi, “Quality of Service Support in IEEE 802.16 Networks,” IEEE Network Mag., vol. 20, no. 2, pp. 50-55, Mar. 2006.
[7] N. Bayer, D. Sivchenko, B. Xu, V. Rakocevic, and J. Habermann, “Transmission timing of signalling messages in IEEE 802.16 based Mesh Networks,” in Proc. European Wireless Conference 2006 (EW ’06), Athens, Greece, April 2006
[8] M. Cao, W. Ma, Q. Zhang, X. Wang, and W. Zhu, “Modelling and performance analysis of the distributed scheduler in IEEE 802.16 mesh mode,” in Proc. of 6th ACM Mobile ad hoc networking and computing, pp.78-89, May 2005
[9] M. Cao, W. Ma, Q. Zhang, and X. Wang, “Analysis of IEEE 802.16 mesh Mode Scheduler Performance,” IEEE Trans. on Wireless Communications, vol. 6, no. 4, pp.1455-1464, Apr. 2007
[10] N.A. Abu Ali, A.M. Taha, H.S. Hassanein, and H.T. Mouftah, “IEEE 802.16 Mesh Schedulers: Issues and Design Challenges,” IEEE Network Mag., vol. 22, no. 1, pp.58-65, Jan.-Feb. 2008.
[11] H. Zhu, K. Lu, ”On The Interference Modeling Issues for Coordinated Distributed Scheduling in IEEE 802.16 Mesh Networks,” in 3rd International Conference of Broadband Communications, Networks and Systems, Oct. 2006.
[12] N. Bayer, Bangnan Xu, V. Rakocevic, J. Habermann, “Improving the Performance of the Distributed Scheduler in IEEE 802.16 Mesh Networks,” Vehicular Technology Conference, VTC2007-Spring. IEEE 65th, pp. 1193-1197, Apr. 2007.
[13] V. Loscri, G. Aloi, “Transmission hold-off time mitigation for IEEE 802.16 mesh networks: a dynamic approach,” Wireless Telecomunications Symposium, pp. 31-37, Apr. 2008.
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