本論文針對同頻全雙工無線區域網路(In-Band  Full Duplex Wireless LANs, IBFD WLANs)中，基於現有的MAC機制使用全雙工會造成節點間競爭的不公平問題，提出有效的解決策略。在這個科技迅速發展的時代，使用者爆炸性的增長，而為了滿足使用者對於無線區域網路需求，便著手開始研究如何為無線區域網路帶來更大的效益，而許多學者採用全雙工技術來實現提升網路效能。隨著科技的進步，全雙工已經可以克服自我干擾問題，但是基於現有的設備及機制套用在全雙工上，會帶來節點間競爭不公平問題。因此本論文提出一種新的媒體存取控制機制，用於解決因全雙工所造成的節點間競爭不公平問題。此機制結合捕獲效應讓節點知道現在環境正在做全雙工，而不等待EIFS持續時間，來有效解決競爭不公平之問題。根據模擬結果顯示此機制可以有效解決競爭不公平之問題，藉此達到全雙工競爭平衡，也提升整體網路的效能。

This paper proposes an effective solution to the networks unfairness caused by transmission in In-Band Full-Duplex Wireless LANs (IBFD WLANs). With the progress of science and technology, full duplex has been able to overcome the problem of self-interference, but based on the existing equipment and mechanisms used in the whole duplex, will bring about unfair contention be-tween nodes. Therefore, this paper proposes a new media access control mechanism to solve the problem of unfair contention between nodes caused by full duplex. This mechanism, combined with the capture effect, lets the node know that the environment is doing full duplex without waiting for the EIFS duration to effectively ad-dress the problem of unfair contention. This mechanism can effectively solve the problem of unfair contention, so as to achieve the balance of full duplex contention and improve the throughput of the overall network.

目錄
第1章	緒論	1
1.1前言	1
1.2研究動機與目的	2
1.3研究方法	2
1.4論文架構	3
第2章	背景知識	4
2.1全雙工基本介紹	4
2.2捕獲效應介紹	8
2.3文獻探討	10
第3章	預備知識	16
3.1問題陳述	16
3.2相關假設	19
第4章	IEEE 802.11無線區域網路下之公平高效全雙工媒體存取控制協定	20
4.1初步分析	20
4.2公平高效全雙工媒體存取控制協定	26
4.3MAC控制訊框格式	30
第5章	效能分析	31
5.1模擬場景與參數	31
5.2實驗結果	31
5.3實驗總結	34
第6章	結論	35
6.1未來工作	35
參考文獻	36
附錄英文論文	39

圖目錄
圖 一、FD傳輸模式	4
圖 二、自身干擾問題	5
圖 三、用戶間干擾問題	5
圖 四、傳統半雙工之場景	6
圖 五、運行全雙工之場景	7
圖 六、傳輸失敗之示意圖	8
圖 七、First Frame Capture	9
圖 八、Second Frame Capture	10
圖 九、A-Duplex協議	11
圖 十、公平性問題一	12
圖 十一、公平性問題二	13
圖 十二、設置EIFS持續時間	14
圖 十三、ACK分開回覆	15
圖 十四、設置EIFS	16
圖 十五、競爭不公平問題	18
圖 十六、一般情況	20
圖 十七、一般情況結果	21
圖 十八、第一捕獲的情況	22
圖 十九、滿足第二捕獲示意圖	23
圖 二十、距離關係圖	24
圖 二十一、第二捕獲效應情況	25
圖 二十二、捕獲效應結果	25
圖 二十三、公平雙向全雙工	27
圖 二十四、公平三向全雙工	28
圖 二十五、控制訊框格式	30
圖 二十六、模擬傳輸效能一	32
圖 二十七、模擬傳輸效能二	33
圖 二十八、模擬公平性指數	34

表目錄
表 一、模擬參數	31

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