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研究生:余佳玲
研究生(外文):Chialing Yu
論文名稱:改善 IEEE 802.11 多重速率區域網路中資料傳輸的公平性
論文名稱(外文):Enhancing the Throughput Fairness in IEEE 802.11 Multi-Rate LAN Environments
指導教授:丁建文丁建文引用關係
指導教授(外文):Jianwen Ding
學位類別:碩士
校院名稱:國立高雄應用科技大學
系所名稱:資訊管理系碩士在職專班
學門:電算機學門
學類:電算機一般學類
論文種類:學術論文
畢業學年度:98
語文別:中文
論文頁數:60
中文關鍵詞:無線區域網路IEEE 802.11載波感測多重存取碰撞避免協定頻寬公平性多重速率調整公平性資料網路速率區域
外文關鍵詞:Wireless LANIEEE 802.11CSMA/CAThroughputFairnessRate Adaptation
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IEEE 802.1標準的主要通訊協定,例如:802.11a、802.11b、 802.11g,皆支援多重速率傳輸的調整,依照距離無線基地台的遠近,行動主機會特別地調整自身的傳輸速率,換言之,隨著訊號雜訊比(SNR)的大小,行動主機會從網路實體層的調變機制中,選擇一個目前較適合傳送的速率。通常距離無線基地台越遠的話,則SNR越小者,所搭配的傳送速率就越慢;相反地,行動主機若距離無線基地台越近的話,則SNR越大者,所搭配的傳送速率就越快。雖然IEEE 802.11所採用的基本媒介競爭機制,是利用載波偵測多重擷取及衝撞避免(CSMA / CA)機制去避免碰撞,但網路通道中的行動主機一旦增多的話,整體傳輸量就會驟降許多,尤其距離無線基地台較遠的行動主機越多的話,整體網路品質是令人堪憂的。為了能解決這個問題,本研究針對無線網路的MAC協定中提出一個新的技術,稱為TFDCF(Throughput Fair Distributed Coordination Function)。
TFDCF 具有兩個傳輸模式:競爭模式(Contention Mode)與主動模式(Active Mode),任一台行動主機在傳輸封包之前,首先均進入競爭模式,然後再進入主動模式。在TFDCF的主動模式中,低傳速的行動主機比高傳速的行動主機更具有網路通道執行的優先權,這樣的設計是為了能讓行動主機不論距離無線基地台是近或是遠,其所造成高低傳速的調變,依然也可保持一定的傳輸品質來。從本文的研究分析與模擬數值中指出,TFDCF能讓每台行動主機的傳輸量皆是公平一致,且不受與基地台的距離遠近,而大為影響原本的傳輸效能。
The main protocols of IEEE 802.11, such as 802.11a, 802.11b, 802.11g, support multi-rate transmission using rate adaptation. Specifically, the mobile stations are far away from an access point, referred to as remote stations, will adaptively select a physical-layer modulation technique with low transmission rate when the signal-to-noise ratio (SNR) becomes small. On the contrary, the mobile stations near an access point, referred to as close stations, will adaptively select a physical-layer modulation technique with high transmission rate when the SNR becomes large. Although these protocols employ Carrier Sense Multiple Access/Collision Avoidance (CSMA/CA) to avoid collisions, the throughput decreases dramatically as the number of stations increases. This means that the performance of remote stations have very poor performance when the number of stations is not small. To cope with this problem, we propose a novel medium access control (MAC) protocol, called Throughput Fair Distributed Coordination Function (TFDCF).
TFDCF has two modes: contention mode and active mode. A mobile station first enters the contention mode and then enters the active mode. In the active mode, TFDCF assigns higher priorities to the stations with lower transmission rates and lower priorities to the stations with higher transmission rates. TFDCF is designed to achieve a good performance tradeoff between remote stations and close stations. Our analysis and simulation results indicated that TFDCF provides throughput fairness to all stations. Also, it achieves a good performance tradeoff between remote stations and close stations.
目錄
誌謝 II
摘要 III
Abstract IV
目錄 V
圖目錄 VI
表目錄 VII
第1章 緒論 1
1.1 研究背景 1
1.2 研究動機 2
1.3 研究目的 4
1.4 論文架構 7
第2章 文獻回顧 9
2.1 IEEE 802.11背景知識介紹 9
2. 1. 1 IEEE 802.11 之發展過程 9
2. 1. 2 IEEE 802.11 之規範說明 11
2. 1. 3 IEEE 802.11 之網路架構 13
2. 1. 4 IEEE 802.11 之運作原理 14
2. 1. 5 IEEE 802.11 傳輸品質保證 24
2. 1. 6 IEEE 802.11 自動速率調整 26
2.2 多重速率多重存取協定的文獻回顧 27
第3章 TFDCF演算法說明 31
3.1 問題描述 31
3.2 演算法說明 32
第4章 模擬實驗與校能分析 39
4.1 模擬實驗參數說明 39
4.2 模擬實驗結果說明 40
4. 1. 1 針對整體網路傳輸量之評估 43
4. 1. 2 針對整體網路使用公平性之評估 45
第5章 結論與建議 48
參考文獻 50
參考文獻

[1] IEEE Standard for Information technology—Telecommunications and information exchange between systems—Local and metropolitan area networks—Specific requirements Part 11: Wireless LAN Medium Access Control(MAC)and Physical Layer(PHY)specifications Amendment 8: Medium Access Control(MAC)Quality of Service Enhancements Enhancements
[2] F. Micó, P. Cuenca, and L. Orozco-Barbosa(2004). "QoS in IEEE 802.11 wireless LAN: Current Research Activities",IEEE Canadian Conference on Electrical and Computer Engineering, vol. 1, pp 447-452.
[3] Hua Zhu, Ming Li, Imrich Chlamtac, and B. Prabhakaran(2004). “A Survey of Quality of Service in IEEE 802.11 Networks”, IEEE WIRELESS COMMUNICATIONS, pp. 6-14.
[4] M. S. Arulampalam, S. Maskell, N. Gordon, and T. Clapp(2002). “A Tutorial on Particle Filters for Online Nonlinear/Non-Gaussian Bayesian Tracking”, IEEE Transactions on Signal Processing, vol. 50, no. 2, pp. 174-188.
[5] C. H. Ke, L. Bin, Y. M. Huang, J. Morris Chang(2009). “Enhanced High Performance Distributed Coordination Function for IEEE 802.11 Multi-rate LANs”, International Journal of Communication Systems, vol. 22, no. 8, pp.1045-1061.
[6] Yao-Lung Yang(2008)。“Performance Analysis and Evaluation of IEEE 802.11n Wireless Networks”。Essay of Master’s degree on Department of Information Engineering, National Central University, Taoyuan County, Taiwan, Republic of China。
[7] Ming-Yin Chen (2004). “A Modified EDCF to support QoS in IEEE 802.11 Wireless LANs”. Essay of Master’s degree on Department of Information Engineering, National Sun Yan-sen University, Kaohsiung City, Taiwan, Republic of China.
[8] Wen-Shen Wang(2007)。“Efficiency and Fairness Improvement Using Dynamic Adaptive EDCA for IEEE 802.11 Ad-hoc networks”, Essay of Master’s degree on Department of Information Engineering, National Tatung University, Taipei City, Taiwan, Republic of China.
[9] Chien-Che Huang(2005). “A MAC Protocol Supporting Quality of Service by Bandwidth Reservation Scheme in Mobile Ad Hoc Wireless Network” . Essay of Master’s degree on Department of Information Engineering, National Central University, Taoyuan County, Taiwan, Republic of China。
[10] Hyung-Joo Ki, Seung-Hyuk Choi, Min-Young Chung, Tae-Jin Lee(2006). “Performance Evaluation of Binary Negative-Exponential Backoff Algorithm in IEEE 802.11 WLAN”, School of Information and Communication Engineering Sungkyunkwan University.
[11] Chang-Chang Liao(2009).“The Study of Multi-Channel MAC Protocols in Wireless Networks”. Essay of Master’s Degree on Department of Electric Machinery , National Kaohsiung University of Applied Science, Kaohsiung City, Taiwan, Republic of China。
[12] Chih-Han Lin(2009). “The Study of Effective Relay Node Selection in Cooperative Wireless Networks”.
[13] Rong-Hong Jian, Liao Guan Syong(2007). “Loacl Wireless Network”, Publisher of Cyusn Hua Science.
[14] Neng-Fu Huang(1998). “Local Network and Fast Network”﹐Publisher of Wei ke.
[15] Matthew S. Gast(2004). “Theory of 802.11 Wireless Network”﹐Publisher of Oreilly.
[16] Stefan Mangold, Sunghyuh Choi, Peter May, Ole Klein, Guido Hiertz, Lothar Stibor(2003). “IEEE 802.11e Wireless LAN for Quality of Service”,
http://www.comnets.rwth-aachen.de/publications/Abstracts/MangoldChoi_EW02.html
[17] H.Y.Hwang, S.J.Kim, D.K.Sung, N.O.Song, “Performance Analysis of IEEE 802.11e EDCA With a Virtual Collision Handler”, Vehicular Technology, IEEE Transactions 2008: Page(s):1293 – 1297
[18] James F.Kurose, Keith W.Ross,“Computer Networking: A Top-Down Approach”, Addison-Wesley 2007 , 546-568
[19] Yu-Sheng Hu(2004). “Performance analysis of IEEE 802.11 DCF with New Backoff Algorithm”. Essay of Master’s Degree on Department of Electric Machinery , National Chung Cheng University, Chiayi County, Taiwan, Republic of China.
[20] Guo-Jen Fu(2006). “Linear Adaptive Contention Window in IEEE 802.11 Wireless LAN”. Essay of Master’s Degree on Department of Electric Machinery , National Chung Hsing University, Taichung City, Taiwan, Republic of China.
[21] O. Abu-Sharkh and A. H. Tewfik(2005). “Throughput Evaluation and Enhancement in 802.11 WLANs with Access Point”, Proceedings of the IEEE 61st Vehicular Technology Conference, Stockholm, Sweden.

[22] H. Kim, S. Yun, I. Kang and S. Bahk(2005). “Resolving 802.11 Performance Anomalies through QoS Differentiation”, IEEE Communication Letters, vol. 9,no. 7, pp. 655-657.
[23] Y. Chetoui and N. Bouabdallah(2007). “Adjustment Mechanism for the IEEE 802.11 Contention Window: An Efficient Bandwidth Sharing Scheme”, Computer Communications Journal, vol. 30, no. 13, pp. 2686-2695.
[24] M. S. Gast(2002). “802.11 Wireless Networks: The Definitive Guide, 2e”, O’REILLY, pp.464.
[25] R. Jain, D. Chiu, and W. Hawe(1984). “A Quantitative Measure of Fairness and Discrimination for Resource Allocation in Shared Computer Systems”, DEC Research Report TR-301.
[26] Yu-Ci Ceng, Meng-Syuan Pan, Jhih-Yu Lin. ”Wireless Local-Area And Personal Network- Application and Technology of Random Sensor”, Jhih Cheng Publisher:Taipei County, Taiwan, Republic of China。
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