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研究生：	黃世傑 Huang, Shi-Jie
論文名稱：	無線區域網路能量分析 Power Analysis for IEEE802.11 Wireless LAN
指導教授：	郭文光 Kuo, Wen-Kuang
學位類別：	碩士 Master
系所名稱：	電機資訊學院 - 電腦與通信工程研究所 Institute of Computer & Communication Engineering
論文出版年：	2005
畢業學年度：	93
語文別：	中文
論文頁數：	74
中文關鍵詞：	無線網路、能量
外文關鍵詞：	power, wireless lan
相關次數：	點閱：59 下載：2
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　　能量消耗一直是無線網路的一個瓶頸。再此篇論文我們提供了一個新的馬可夫鏈，來分析IEEE802.11無線網路分散式協調功能(DCF)[1]的能量效率。主要是考慮理想通道，非理想通道，碰撞，重傳限制，無重傳限制，和在後退(backoff)的凝結機制。依照數學模型與傳送接收的能量消耗。一個站台在DCF機制下不同狀態的能量消耗將被計算。DCF協定下的全部能量消耗跟能量效率也將被計算。透過媒體存取控制層(MAC)與實體層(PHY)共同效應的結合我們研究IEEE802.11a與IEEE802.11b的能量效率。最後，IEEE802.11a與IEEE802.11b系統的效能與設計的準則是被斷定。

　　Power consumption is one of the bottlenecks for mobile devices。 In thesis， a new Markov model is developed to analyze the power efficiency of IEEE 802.11 Wireless LANs Distributed Coordination Function (DCF) protocol by taking into account the idle channel and the error channel， collisions， packet retry limits and no retry limit and freezing mechanism in backoff。 Based on the proposed mathematical model and power dissipation due to transmission and receiving， the power consumptions in different states of a tagged station performing the DCF protocol are computed。 The total power consumption and power efficiency of the DCF protocol is calculated accordingly。 We then investigate the influence of the Carrier Sense Multiple Access with Collision Avoidance (CSMA/CA) protocol upon the power efficiency of IEEE 802.11a and IEEE 802.11b Wireless LANs through combining the joint effect of MAC and PHY layers。 Finally， system performance and design criterions for IEEE 802.11 Wireless LANs are concluded。

摘要 …………………………………………………………………IV
Abstract…………………………………………………………………V
致謝 ……………………………………………………………………VI
第一章 簡介 .................................................5
1 研究動機與方法 ..........................................5
2 802.11 MAC簡介.........................................5
2.1 分散式協調功能DCF(Distributed Coordination Function).....6
2.2 IEEE802.11a簡介.........................................9
2.3 802.11b簡介 ..........................................11
第 2 章 理想通道與非理想通道馬可夫鏈分析 ....................14
1.1 理想通道下重傳限制分析 ................................14
1.2 錯誤通道下重傳限制分析 ...............................15
2.1 理想通道下無重傳限制分析 ..............................17
2.2 錯誤通道下無重傳限制分析 ..............................18
第 3 章 理想通道與非理想通道能量分析 ........................21
1 理想通道下能量分析 .....................................21
2 錯誤能量分析 ...........................................22
2.1 RTS/CTS機制下錯誤能量分析 ..........................23
2.2 基本機制下錯誤能量分析 ................................26
第 4 章理論分析與模擬 ......................................29
1 理想通道下 802.11a能量分析與模擬 .........................29
1.1 理想通道下 802.11a有重傳限制能量分析與模擬 .............29
1.2 理想通道下 802.11a無重傳限制能量分析與模擬 .............35
2 理想通道下 802.11b能量分析與模擬 ........................40
2.1 理想通道下 802.11b有重傳限制能量分析與模擬 .............40
2.2 理想通道下 802.11b無重傳限制能量分析與模擬 .............47
3 非理想通道下 802.11a能量分析與模擬 .......................52
3.1 非理想通道下 802.11a重傳限制能量分析與模擬 .............52
3.2 非理想通道下 802.11a無重傳限制能量分析與模擬 ...........58
4 非理想通道下 802.11b能量分析與模擬 ......................61
4.1 非理想通道下 802.11b重傳限制能量分析與模擬 .............61
4.2 非理想通道下 802.11b無重傳限制能量分析與模擬 ...........68
第五章 結論與未來展望 ......................................72
參考文獻 ...................................................73
                                    

[1] IEEE 802.11WG Part 11:Wireless LAN Medium Access Control (MAC)
and Physical Layer (PHY) Specification, Standard, IEEE, 1999.
[2] G. Bianchi, “Performance analysis of the IEEE 802.11 distributed coordination function,” IEEE J. Select. Areas Commun., vol. 18, pp. 535-547,Mar. 2000.
[3]Y. Xiao, “A Simple and Effective Priority Scheme for IEEE 802.11,”. IEEE Communications Letters, Vol.7, No. 2, Feb. 2003, pp. 70-72.
[4]802.11a Wireless LAN Medium Access Control (MAC) and Physical Layer (PHY) Specifications High-speed Physical Layer in the 5 GHz band
[5]802.11b Wireless LAN Medium Access Control (MAC) and Physical Layer (PHY) specifications: Higher-Speed Physical Layer Extension in the 2.4 GHz Band
[6] P. Chatzimisios, A.C. Boucouvalas and V. Vitsas,“Influence of channel BER on IEEE 802.11 DCF”. Electronics Letters, vol. 39, no. 23, pp. 1687–1689,. November 2003
[7] X. Dong and P. Varaiya “Saturation throughput analysis of IEEE 802.11 wireless lans for a lossy channel” IEEE Communication Letters, v9, n2, Feb 2005.
[8] Periklis Chatzimisios, Anthony C. Boucouvalas Vasileios Vitsas “Performance Analysis of IEEE 802.11 DCF in the Presence of Transmission Errors.” IEEE ICC 2004, paris.
[9]”The network simulator – NS2”http:www.isi.edu/nsnam/ns

校內：2015-07-21公開
校外：2015-07-21公開

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