Please use this identifier to cite or link to this item: http://hdl.handle.net/11455/6363
標題: IEEE 802.11e增強分散式通道存取機制之效能分析
Performance Study on Enhanced Distributed Channel Access (EDCA) for IEEEE 802.11e
作者: 林廷翰
Lin, Ting-Han
關鍵字: IEEEE 802.11e
IEEE 802.11e
WLAN
QoS
EDCA
無線區域網路
網路服務品質
增強分散式通道存取機制
出版社: 電機工程學系所
引用: [1]IEEE 802.11 WG, “Supplement to IEEE Standard for Information technology-Telecommunications and information exchange between systems-Local and Metropolitan Area Networks-Specific Requirements- Part 11:Wireless LAN MAC and PHY specifications: Higher-Speed Physical Layer Extension in the 2.4GHz Band” IEEE Std 802.11b-1999. [2]Y. J. Kim and Y. J. Suh, ”Adaptive Polling MAC Schemes for IEEE 802.11 Wireless LANs” Vehicular Technology Conference, VTC 2003-Spring. The 57th IEEE Semiannual. pp. 2528 - 2532 Vol. 4. 22-25, Apr. 2003. [3]D. Collins, “Carrier Grade Voice over IP”, 2nd Ed, McGraw-Hill, September 2002. [4]N. Smavatkul, Y. Chen and S. Emeott, ”Voice Capacity Evaluation of IEEE 802.11a with Automatic Rate Selection”, Global Telecommunications Conference, GLOBECOM ''03. pp. 518 - 522 Vol. 1. 1-5, Dec. 2003. [5]IEEE 802.11 WG, “Supplement to IEEE Standard for Information technology-Telecommunications and information exchange between systems-Local and Metropolitan Area Networks-Specific Requirements- Part 11:Wireless LAN MAC and PHY specifications: Amendment 8: MAC Quality of Service Enhancements”, IEEE Std 802.11e-2005. [6]Chih-Shiuan Jiang, “Adaptive Adjustment on CP/CF Ratio for Improving QoS Support in IEEE 802.11e Networks”, National Sun Yat-sen University, Taiwan, July, 2005 [7]Elizabeth M. Royer, Santa Barbara and Chai-Keong Toh, “A Review of Current Routing Protocols for Ad Hoc Mobile Wireless Networks”, IEEE personal Communications, Apr. 1999, pp. 46-55. [8]Fumiaki SATO, Hiroshi KOZUKA, Kazuya MIYAZAKI and Hisao FUKUOKA, “Noah: An Environment for Distributed Autonomous Systems”, Computer & Information Systems Laboratory Mitsubishi Electric Corporation 5-1-1 Ofuna, Kamakura, Kanagawa 247, Japan [9]Chih-Heng Ke, “http://140.116.72.80/~smallko/ns2/ns2.htm”, Computer & Network Group Electrical Engineering Department of National Cheng Kung University, Taiwan [10]The ns manual: “http://www.isi.edu/nsnam/ns/ns-documentation.html “ [11]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. [12]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. [13]Dajiang He, Charles Q. Shen, “Simulation Study of IEEE 802.11e EDCF”, Institute for Infocomm Research National University of Singapore
摘要: 在無線網路環境下使用語音傳輸(VoWLAN)將是一個在未來具有相當成長性的應用。因此本實驗的動機便是探討VoIP技術的前瞻性和將其在無線寬頻環境下傳輸的可行性。IEEE 802.11e 的碰撞避免機制是為了讓移動平台(Mobile Station) 在必須同時傳輸語音和一般資料性封包時,可以擁有不同優先權的機制;在此規範中語音封包擁有高於資料封包較先傳送的優先權,因此可以提供較好的網路傳輸品質。我們提出一個改良式避免碰撞機制使用模擬工具ns2來進行模擬。測試的環境是將語音和資料封包在建構式網路(Infrastructure Network)環境下做測試。而實驗的結果證實改良碰撞機制效能會優於傳統802.11 和802.11e。
Motivated by the promising voice over IP technology and the wide service availability of WLANs, the application of voice over WLAN (VoWLAN) is expected to experience a dramatic growth in the near future. The collision resolution mechanism in IEEE 802.11e can support n-users transmitted data flow and voice flow with different priorities. A voice packet flow was set to have higher priority than a data packet flow in this protocol, which made voice flow have better quality performance of network transmission. We have proposed a new collision resolution mechanism experiment which is based on ns2 platform to simulate. Voice and data experiment was setting incorporated under the infrastructure mode. The simulation results show the proposed collision resolution algorithm performance better than the original algorithm under 802.11 and 802.11e.
URI: http://hdl.handle.net/11455/6363
其他識別: U0005-1408200622425500
文章連結: http://www.airitilibrary.com/Publication/alDetailedMesh1?DocID=U0005-1408200622425500
Appears in Collections:電機工程學系所

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