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研究生： 蔡芮芃
Tsai, Jui-Peng
論文名稱： 多躍式無線隨意網路下具服務品質保證結合功率控制之多通道媒體存取控制協定
A Multi-Channel MAC Protocol with Power Control for QoS Support in Multi-Hop Wireless Ad Hoc Networks
指導教授： 蘇賜麟
Su, Szu-Lin
學位類別： 碩士
Master
系所名稱： 電機資訊學院 - 電腦與通信工程研究所
Institute of Computer & Communication Engineering
論文出版年： 2011
畢業學年度： 99
語文別： 中文
論文頁數： 61
中文關鍵詞： 多通道媒體存取控制協定 、分時多工擷取
外文關鍵詞： multi-channel MAC protocol, TDMA
相關次數： 點閱：132  下載：1 
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    • 感知隨意網路(Cognitive Ad Hoc Networks)其特性為多通道系統。但現有的多通道系統仍有可以改善的部份，如：需要多個收發機、存在隱藏節點（Hidden Node）問題、頻譜效能（Spectrum Efficiency）等問題。
    本論文根據分時多工擷取(TDMA)系統架構，提出一個能夠改善頻譜效能的媒體存取（MAC）層之通訊協定，並結合Routing Protocol，設計一個能提供服務品質(Quality of Service，called QoS)保證的系統架構，在此系統中每個節點只須有一個半多工的收發機。
    由模擬結果可知，在資料傳送率為6 Mbps 中我們所提出的系統架構其吞吐量約為TMMAC 吞吐量的兩倍，且阻塞率（Blocking Rate）也較低，另外，我們所提出系統不會有服務中斷的情形發生，意即中斷率（Dropping Rate）為0。
    關鍵詞： 多通道媒體存取控制協定；分時多工擷取

    In cognitive wireless ad hoc networks, multiple channels are inherent in this system. Thus, designing a multi-channel MAC protocol is necessary. There are many problems in existing multi-channel MAC protocols that need to be overcome. Such as some protocols require multiple transceivers, exist hidden node problems, or make spatial reuse inefficient, etc..
    We proposed a TDMA based multi-channel MAC protocol that makes spatial reuse more efficient. And we combine the MAC layer and routing layer to support QoS applications. In this system, each node is equipped with only one transceiver.
    Simulation results show that our proposed MAC protocol is able to achieve 2 times the throughput of TMMAC with data rate 6 Mbps. And our proposed MAC protocol has lower blocking rate. Our proposed MAC protocol do not make any packet dropped.
    Keywords: Multi-Channel MAC Protocol；TDMA

    目錄 摘要................................................... i Abstract ............................................. ii 目錄............................................... iv 圖目錄.............................................. vi 表目錄..............................................vii 第一章緒論........................................ 1 1.1 研究背景與動機..................................... 1 1.2 論文章節組織......................................... 2 第二章現有多通道系統架構.................................... 3 2.1 Dedicated Control Channel Approach................. 3 2.2 Split Phase Approach................................ 5 2.2.1 TMMAC ............................................ 6 2.3 Common Hopping Approach......................... 7 2.4 Multiple Rendezvous MAC Protocol.................... 8 2.5 Multi-Channel各方法比較............................ 10 第三章單通道系統架構..................................... 11 3.1 現有系統問題分析..................................... 11 3.1.1 頻寬估測問題....................................... 11 3.1.2 frequency reuse .................................. 12 3.1.3 所需交換的控制訊息量............................... 12 3.1.4 multi-power 和multi-rate所產生的問題............... 12 3.2 單通道系統....................................... 13 3.2.1 系統環境假設................................... 14 3.2.2 單通道系統架構............................... 14 第四章多通道系統架構.................................. 24 4.1 多通道系統架構.................................... 24 4.1.1 設計目標........................................ 24 4.1.2 系統環境........................................ 24 4.1.3 系統設計....................................... 25 4.2 資料時槽的選擇...................................28 4.2.1 時槽選擇流程圖................................. 32 4.3 解決通道數目限制問題.............................. 35 第五章模擬結果與分析................................... 36 5.1 參數設定......................................... 36 5.2 模擬結果......................................... 39 5.2.1 資料傳送率：54 Mbps ............................ 40 5.2.2 資料傳送率：24 Mbps ........................... 49 5.2.3 資料傳送率：6 Mbps ........................... 54 第六章結論............................................... 59 參考文獻.................................................. 60

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