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研究生： 劉彩鳳
Liu,Tsai-Feng
論文名稱： 在WMN 網路上考量Intra/Inter-flow 干擾之多網卡路由協定
Multi-Interface Routing with Intra/Inter-flow Interference (MiRii) Considerations in Wireless Mesh Networks
指導教授： 蔡子傑
Tsai,Tzu-Chieh
學位類別： 碩士
Master
系所名稱： 理學院 - 資訊科學系
論文出版年： 2007
畢業學年度： 95
語文別： 中文
論文頁數： 73
中文關鍵詞： 無線網狀網路 、路由協定 、排隊理論 、鏈結品質 、干擾 、AODV
外文關鍵詞： Link Quality, AODV, Little's Result
相關次數： 點閱：110  下載：70 
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    • 近年來興起一個前瞻性無線技術，稱之為無線網狀網路（Wireless Mesh Networks），WMNs 以所費低廉方式提供無線網路最後一哩存取Internet，同時具備ad hoc 網路全部優點，例如自我組織（self-organization）、自我組態（self-configuration）等。儘管WMNs 骨幹部分與平面式ad hoc 網路相似，多網卡（multi-radio）的Mesh Routers 節點卻是固定不動且沒有電力限制。有鑑於此，設計於ad hoc 網路上之路由協定並不適合於WMNs。
    WCETT（Weighted Cumulated Expected Transmission Time）metric 考量到intra-flow 干擾，卻未捕捉到inter-flow 干擾；而LBAR（Load-Balanced Ad hoc Routing）協定以計算節點之活躍值（nodal activity）與訊務流量干擾選擇路徑，並無支援多網卡路由，LBAR 可以在單一網卡環境表現良好，在多網卡環境卻不一定。因此，我們提出一個WMNs 上考量到Intra/Inter-flow干擾之多網卡路由協定，稱為MiRii。模擬結果顯示出我們路由協定可以改善網路效能，包含了封包成功傳送率及平均點對點延遲。

    A new promising wireless technology has emerged recently, called wireless mesh networks (WMNs). WMNs are inexpensive way to provide wireless last-mile broadband Internet access and have all the advantages of ad hoc network, such as self-organization, self-configuration. Although WMNs backbone is similar to flat ad hoc network, mesh routers with multi-radio are stationary and have no power constraints. As a result, routing protocols designed for ad hoc network may not be appropriate for WMNs.
    The WCETT (Weighted Cumulated Expected Transmission Time) metric takes intra-flow interference into consideration, but does not capture inter-flow interference. LBAR (Load-Balanced Ad hoc Routing) calculates nodal activity and traffic interference for choosing a path, but does not supporting multi-radio. LBAR may be perform well in single-radio environment, but do not perform as well in multi-radios. Consequently, we incorporate a new Multi-Interface Routing with Intra/Inter-flow Interference in Wireless Mesh Networks, called MiRii. The simulations show that our routing protocol can improve the network performance including the Packet Delivery Ratio and average end-to-end delay.

    第一章 緒論................................................... 1
    1.1 簡介...................................................... 1
    1.2 研究動機與目的............................................ 6
    1.3 章節提要.................................................. 9
    第二章 文獻探討.............................................. 10
    2.1 考量鏈結品質（Link Quality）之路由演算法................. 10
    2.1.1 ETX：Expected Transmission Count ...................... 10
    2.1.2 WCETT：Weighted Cumulative Expected Transmission Time . 12
    2.1.3 MUP：Multi-radio Unification Protocol ................. 15
    2.2 與Loading-Aware 相關之路由演算法......................... 17
    2.3 與WMNs 之Multi-interface 與Multi-channel 相關之論文研究.. 21
    第三章 在WMN 網路上考量Intra/Inter-flow 干擾之多網卡路由協定. 25
    3.1 基本假設與設計目標....................................... 25
    3.2 MiRii Routing Metric 設計................................ 26
    3.2.1 Little’s result 理論（Theorem） ....................... 27
    3.2.2 活躍時間（Activity Time） ............................. 27
    3.2.3 MiRii 路由成本......................................... 28
    3.3 實作..................................................... 29
    3.3.1 AODV 簡介[5] .......................................... 29
    3.3.2 RREQ 封包與流程........................................ 30
    3.3.3 RREP 封包與流程........................................ 35
    3.3.4 範例說明............................................... 37
    3.3.5 Flow-based MiRii（F-MiRii）Routing .................... 39
    第四章 模擬結果及分析........................................ 43
    4.1 模擬方法................................................. 43
    4.2 實例1 ................................................... 43
    4.3 實例2 ................................................... 49
    4.4 實例 3 .................................................. 55
    第五章 結論與未來研究工作.................................... 61
    5.1 結論..................................................... 61
    5.2 未來研究工作............................................. 62

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