Please use this identifier to cite or link to this item: http://hdl.handle.net/11455/7051
標題: 802.11e無線網路之普瓦松增強分散式通道存取
Poisson-Based Enhanced Distributed Channel Access in 802.11e Wireless LAN
作者: 馬俊博
Ma, Chun-Po
關鍵字: IEEE 802.11e Wireless LAN
802.11e無線區域網路
A Enhanced Distributed Channel Access
Poisson probability
Quality of Service
增強分散式通道存取
普瓦松機率
服務品質保證
出版社: 電機工程學系所
引用: [1] IEEE 802.11 WG, “International Standard for Information Technology —Local and Metropolitan Area Networks-Specific Requirements — Part 11:Wireless LAN MAC and PHY specifications," 1999. [2] IEEE 802.11 WG, “Draft Supplement to Standard for Telecommunications and Information Exchange between Systems-LAN/MAN Specific Requirements— Part 11: Wireless MAC and PHY Specifications: MAC Enhancements for QoS," IEEE 802.11e/draft 9.0, Oct. 2004. [3] Lamia Romdhani, Qiang Ni, and Thierry Turletti, “AEDCF: Enhanced Service Differentiation for IEEE 802.11 Wireless Ad-Hoc Networks”, IEEE WCNC'03 (Wireless Communications and Networking), New Orleans, Louisiana, vol.2, pp.1373-1378, March 2003. [4] Mohammad Malli, Qiang Ni, Thierry Turletti, and Chadi Barakat. “Adaptive Fair Channel Allocation for QoS Enhancement in IEEE 802.11 Wireless LANs”. Accepted to appear in IEEE ICC 2004 (International Conference on Communications), Paris, France, June 2004. [5] I. Aad and C. Castelluccia, “Differentiation mechanisms for IEEE 802.11", IEEE Infocom, Apr. 2001. [6] J. Deng and R. S. Chang, “A priority Scheme for IEEE 802.11 DCF Access Method", IEICE, Vol. 82-B, No. 1, Jan. 1999. [7] J.L. Sobrinho and A.S. Krishnakumar, “Real-time traffic over the IEEE 802.11 medium access control layer", Bell Labs Technical Journal, 48 1996. [8] A. Veres, et al., “Supporting service differentiation in wireless packetnetworks using distributed control", JSAC, Vol. 19, No. 10, Oct. 2001. [9] I. Aad and C. Castelluccia, “Remarks on per-flow differentiation in IEEE 802.11", Proc. of European Wireless, Feb. 2002. [10] S. Mangold “IEEE 802.11eWireless LAN for Quality of Service",European Wireless, Feb. 2002. [11] Jirka Klaue, Berthold Rathke, and Adam Wolisz “EvalVid - A Framework for Video Transmission and Quality Evaluation", Technical University of Berlin, Telecommunication Networks Group (TKN) [12] Jong-Deok Kim and Chong-Kwon Kim, “Performance analysis and evaluation of IEEE 802.11e EDCF”, Wireless Communications and Mobile Computing, pp.55-74, 2004. [13] Q. Ni, L. Romdhani, and T. Turletti, “A survey of QoS Enhancements for IEEE 802.11 Wireless LAN”, to appear in Journal of Wireless Communications and Mobile Computing, John Wiley, vol.4, pp. 547-566, 2004. [14] Qiang Ni, Imad Aad, Chadi Barakat, and Thierry Turletti, “Modeling and Analysis of Slow CW Decrease for IEEE 802.11 WLAN”, IEEE 2003 International Symposium on Personal, Indoor and Mobile Radio Communication Proceedings on vol.2, pp.1717-1721, Sept 2003. [15] Federico Cali, Marco Conti, and Enrico Gregori, “IEEE 802.11 Protocol: Design and Performance Evaluation of an Adaptive Backoff Mechanism”, IEEE Journal on Selected Areas in Communications, vol.18, no.9, pp.1774-1786, September 2000. [16] Younggoo Kwon, Yuguang Fang, Senior Member, IEEE, and Haniph Latchman, “Design of MAC Protocols With Fast Collision Resolution for Wireless Local Area Networks”, IEEE Transactions on Wireless Communications, vol.3, no.3, pp.793-807, May 2003. [17] Kanghee Kim, Aftab Ahmad, and Kiseon Kim, “A Wireless Multimedia LAN Architecture Using DCF With Shortened Contention Window for QoS Provisioning”, IEEE Communications Letters, vol.7, no.2, pp.97-99, February 2003. [18] Larry L. Peterson and Bruce S. Davie, “Computer Networks”, Morgan Kaufmann Publishers, 3nd Ed. [19] “The ns Manual”, http://www.isi.edu/nsnam/ns/doc/ns_doc.pdf. [20] “Network Simulator (ns), version 2”, http://www.isi.edu/nsnam/ns/. [21] “An IEEE 802.11e EDCA and CFB Simulation Model for ns-2”, http://www.tkn.tu-berlin.de/research/802.11e_ns2/.
摘要: 對於即時性多媒體的日漸使用頻繁,在於無線網路Quality of Service (QoS)的支援更為重要,因此802.11工作小組制訂了一個可以支援服務品質的標準,名為802.11e。其中包含了一個新的媒介存取機制稱為以競爭視窗為基底增強分散式通道存取(EDCA)。 然而,當每個無線站台成功傳送後,EDCA會將競爭視窗重設為最小值,這個行為並不適應於網路狀態,因此減少網路的使用,進而造成浪費,結果呈現出壞的效能以及低的網路使用率。所以我們提出一個新的競爭視窗基底藉由普瓦松機率的方法去強健網路狀態,不論是在小流量或是大流量都可以適應。 我們使用NS2針對不同的網路情形,模擬分析所提出的普瓦松增強分散式通道存取(PEDCA)及其它增強機制(適應性增強分散式協調機制(AEDCF),適應性公平增強分散式協調機制(AFEDCF))的效能差異比較,我們發現PEDCA均較其他機制好。
The emerging widespread use of real-time multimedia over wireless networks makes the support of Quality of Service (QoS) more important. Thus, the IEEE 802.11 working group has defined a new standard to support QoS, called IEEE 802.11e. In 802.11e, a new medium access mechanism called a contention-window based enhanced distributed channel access (EDCA) is defined. However, the EDCA technique resets the contention window of the mobile station to its minimum after each successful transmission. This behavior does not adapt to the network condition. Therefore it reduces the network utilization and results in both poor performance and poor link utilization. So we proposed a new contention-window update mechanism called Poisson-Based EDCA to adapt to the network condition. We use Network Simulator Version 2 (NS2) to simulate Poisson-Based EDCA (PEDCA) and other enhanced schemes (AEDCF, AFEDCF) and compare them. We found that PEDCA is generally better than the other schemes.
URI: http://hdl.handle.net/11455/7051
其他識別: U0005-2806200612073800
文章連結: http://www.airitilibrary.com/Publication/alDetailedMesh1?DocID=U0005-2806200612073800
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