使用GloMoSim模擬可適性的媒體存取控制

本論文主要設計可適性的媒體存取控制，利用CSMA/CA與TDMA/TDD共存之方式，根據移動的速度，選擇切換使用的媒體存取控制協定。當速度低於某一個設定的速度參考值時，選擇使用CSMA/CA；反之則選擇TDMA/TDD，克服了CSMA/CA無法適用於高速移動環境之缺點。研究中使用GloMoSim做為我們的模擬平台，首先模擬探討CSMA/CA在高速移動環境中之效能與問題，並由可適性媒體存取控制之模擬結果，證明我們設計的可適性媒體存取控制適合於不管低速移動或者高速移動環境當中。

關鍵字

媒體存取控制； IEEE 802.11 ； IEEE 802.16

並列摘要

In this thesis, we design an adaptive medium access control scheme. Two different MAC protocol, CSMA/CA and TDMA/TDD, coexist in MAC layer. Adaptive MAC scheme selects which MAC protocol is suitable based on the speed of mobile station. If the speed of mobile station is higher than a velocity threshold, the TDMA/TDD is used, otherwise the CSMA/CA with RTS/CTS is used. The GloMoSim is employed to be our simulator in the thesis. First, we study and simulate the performance of CSMA/CA with RTS/CTS under high-mobility environment. Finally from the results of simulating adaptive MAC scheme, it proves adaptive MAC scheme is suitable to not only low-mobility environment but also high-mobility environment.

並列關鍵字

Medium access control ； IEEE 802.11 ； IEEE 802.16

參考文獻

[2] IEEE. 802.16-2004: Air Interface for Fixed Broadband Wireless Access Systems. Standard, 2004. IEEE standard for

local and metropolitan area networks.

[3] T.S. Rappaport, “Wireless communications, principles and practice,”Prentice Hall, 1996

[4] G. Bianchi, “Performance analysis of the IEEE 802.11 distributed coordination function,” IEEE Joournal Selected Areas Commun., vol. 18, pp. 535-547, NO. 3, Mar. 2000.

[6] Yawgeng Chau and Yao-Hua Chen, “Adaptive Medium Access Control with CSMA/CA and TDMA,” submitted to Wireless and Mobile Comupting, Oct. 2006.

國際替代計量

使用GloMoSim模擬可適性的媒體存取控制

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