博碩士論文 etd-0901103-223638 詳細資訊


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姓名 林安泰(An-Tai Lin) 電子郵件信箱 lat@water.ee.nsysu.edu.tw
畢業系所 電機工程學系研究所(Electrical Engineering)
畢業學位 碩士(Master) 畢業時期 91學年第2學期
論文名稱(中) 適合即時性資料傳送的IEEE 802.11無線區域網路協定
論文名稱(英) A Modified Distributed Coordination Function for Real-Time Traffic in IEEE 802.11 WLAN
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    摘要(中) 分散式協調功能(DCF)是傳統IEEE 802.11無線區域網路媒介存取控制(MAC)協定所採用的基本擷取方法,也就是利用載波感測多重擷取及碰撞避免(CSMA/CA)的技術,以及隨機延遲時間機制(binary slotted exponential backoff scheme)來達成工作站傳送與接收資料。然而,這種方法並不適合用來傳遞即時性資料,因為隨機延遲時間機制會產生很大的訊框延遲(delay)以及延遲的變動(jitter)。因此,我們提出一個改良的分散式協調功能(MDCF)。MDCF利用提前時間延遲機制(forward backoff scheme)讓即時性資料擁有較高的優先權,降低了即時性資料的訊框延遲和延遲變動。同時,我們利用連線允入控制(CAC)來處理網路過載現象,避免因網路過於擁塞所造成的碰撞。我們的協定可以對即時性服務提供網路輸出率、訊框延遲及訊框延遲變動等服務品質保證(QOS)。實驗結果顯示,MDCF比其他DCF的方法有更低的訊框延遲和延遲變動,更適合用來傳送即時性資料。
    摘要(英) The Distributed Coordination Function (DCF) which uses Carrier Sense Multiple Access with Collision Avoidance (CSMA/CA) and binary slotted exponential backoff scheme is the basis of the IEEE 802.11 Medium Access Control (MAC) protocol. However, the DCF is not suitable for real-time traffic control since the backoff scheme may cause huge frame delay and jitter. We propose a modified DCF which uses a forward backoff scheme to remedy this disadvantage. In addition, a call admission control (CAC) is also proposed. Our protocol can guarantee service qualities such as the network throughput, frame delay, and jitter for real-time traffics. Besides, the modified DCF is still compliant with the IEEE 802.11 standard. Simulation results have shown that our method performs better than other DCF disciplines.
    關鍵字(中)
  • 無線區域網路
  • 媒介存取控制
  • 即時性資料
  • 時間延遲機制
  • 連線允入控制
  • 關鍵字(英)
  • real time
  • CAC
  • MAC
  • IEEE 802.11
  • Wireless LAN
  • 論文目次 摘要 i
    Abstract ii
    第一章 簡介 1
    第二章 IEEE 802.11 無線區域網路 4
    2.1 IEEE 802.11 無線區域網路的硬體架構 4
    2.2 IEEE 802.11 媒介存取控制層的通訊協定 7
    2.2.1 分散式協調功能(DCF) 10
    2.2.2 集中式協調功能(PCF) 14
    2.3 IEEE 802.11 的同步處理 15
    第三章 文獻探討 16
    第四章 改良的分散式協調功能 21
    4.1 相關前置工作 21
    4.1.1 訊框定義 21
    4.1.2 即時表格的建立與維護 22
    4.2 提前時間延遲機制 25
    4.2.1 提前時間延遲機制的操作 25
    4.2.2 實例 27
    4.3 連線允入控制 29
    4.3.1 相關專有名詞的定義 30
    4.3.2 連線允入控制的操作 31
    第五章 數學分析 35
    5.1 Markov Chain Model 35
    5.2 Throughput Analysis 38
    第六章 模擬結果與分析 40
    6.1 模擬環境 40
    6.2 實驗一 42
    6.3 實驗二 49
    6.4 實驗三 53
    第七章 結論 57
    參考文獻 58
    參考文獻 [1]. IEEE standard for Wireless LAN Medium Access Control (MAC) and Physical Layer (PHY) specifications, ISO/IEC 8802-11:1999(E), Aug. 1999.
    [2]. L.M. Correia and R. Prasad, "An overview of wireless broadband communications," IEEE Communications Magazine, vol. 35, no. 1, pp. 28-38, Jan. 1997.
    [3]. B.P Crow and J.G. Kim, "IEEE 802.11 Wireless Local Area Networks," IEEE Communications Magazine, Vol. 35, no. 9, pp. 116-126, Sep. 1997
    [4]. R. van Nee and G. Awater, "New High-rate Wireless LAN Standards," IEEE Communications Magazine, Vol. 37, no. 12, pp. 82-88, Dec. 1999
    [5]. M.A. Visser and M.E. Zarki, "Voice and data transimission over an 802.11 wireless network," Proc. Personal, Indoor and Mobile Radio Communications Conference, vol. 2, pp. 648-652, Sep. 1995.
    [6]. W.K. Kuo, C.Y. Chan, and K.C. Chen, "Time bounded services and, mobility management in IEEE 802.11 wireless LANs," Proc. IEEE Personal Wireless Communication Conference, pp. 157-161, 1997.
    [7]. J. Sanchez, R. Martinez, and M.W. Marcellin, "A survey of MAC protocols proposed for wireless ATM," IEEE Network, vol. 11, pp. 52-62, Nov.-Dec. 1997.
    [8]. J.L. Sobrinho and A.S. Krishnakumar, "Quality-of-service in ad hoc carrier sense multiple access wireless network," IEEE Journal on Selected Areas in Communications, vol. 17, no. 8, pp. 1353-1368, Aug. 1999.
    [9]. W.T. Chen, B.B. Jian, and S.C. Lo, "An adaptive retransmission scheme with QoS support for the IEEE 802.11 MAC enhancement," Proc. IEEE Vehicular Technology Conference, vol. 1, pp. 70 -74, Sep. 2002.
    [10]. J.P. Sheu, C.H. Liu, S.L. Wu, and Y.C. Tseng, "A Priority MAC Protocol to Support Real-Time Multimedia Traffic in Ad Hoc Networks," ACM Wireless Networks.
    [11]. C.S. Hsu and J.P. Sheu, "Initialization protocols for IEEE 802.11-based ad hoc networks," Proc. International Conference on Parallel and Distributed Systems, pp. 273-278, Dec. 2002.
    [12]. K. Nakano and S. Olariu, "Randomized initialization protocols for ad hoc networks," IEEE Transactions on Parallel and Distributed Systems, vol. 11, no. 7, pp. 749-759, Jul. 2000.
    [13]. S.T. Sheu and T.F. Sheu, "A bandwidth allocation / sharing / extension protocol for multimedia over IEEE 802.11 ad hoc wireless LANs", IEEE Journal on Selected Areas in Communications, vol. 19, no. 10, pp. 2065-2080, Oct. 2001.
    [14]. D.J. DENG and R.S. CHANG, "A Priority Scheme for IEEE 802.11 DCF Access Method," IEICE Transactions on Communications, vol. E82-B no.1 pp. 96-102, Jan. 1999.
    [15]. I. Aad and C. Castelluccia, "Differentiation mechanisms for IEEE 802.11", Proc. IEEE INFOCOM 2001, vol. 1, pp. 582-590, 2001.
    [16]. A. Veres, A.T. Campbell, M. Barry, and L.H.Sun, "Supporting service differentiation in wireless packet networks using distributed control," IEEE Journal on Selected Areas in Communications, vol. 19, no. 10, pp. 2081 -2093, Oct. 2001.
    [17]. X. Pallot and L.E. Miller, "Implementing message priority policies over an 802.11 based mobile ad hoc network," Proc. IEEE Military Communications Conference, vol. 2, pp. 861V865, 2001.
    [18]. H. Wu and S. Cheng, "IEEE 802.11 Distributed Coordination Function (DCF): Analysis and Enhancement", Proc. IEEE International Conference on Communications, vol. 1, pp. 605-609, Apr. 2002.
    [19]. Yang Xiao, "A Simple and Effective Priority Scheme for IEEE 802.11," IEEE Communications Letters, vol. 7, no. 2, pp. 70-72, Feb 2003.
    [20]. G. Chesson, A. Singla, W. Diepstraten, and H. Tenniusen, "VDCF State Machine Description," IEEE Document, 802.11-00/412rl, Nov. 2000.
    [21]. G. Chesson, A. Singla, W. Diepstraten, and H. Tenniusen, "VDCF Proposed Draft Text," IEEE Document, 802.11-01/131, Mar. 2001.
    [22]. T. Ho and K. Chen, "Performance Analysis of IEEE 802.11 CSMA/CA Medium Access Control Protocol," Proc. Personal, Indoor and Mobile Radio Communications Conference, pp. 407-411, Oct. 1996
    [23]. G. Bianchi, "IEEE 802.11 Saturation Throughput Analysis," IEEE Communications Letters, vol. 2, no. 12, pp. 318-320, Dec. 1998.
    [24]. G. Bianchi, "Performance Analysis of the IEEE 802.11 Distributed Coordination Function," IEEE Journal on Selected Areas in Communications, vol. 18, no. 3, pp. 535-547, Mar. 2000.
    [25]. H. Wu and Y. Peng, "Performance of Reliable Transport Protocol over IEEE 802.11 Wireless LAN: Analysis and Enhancement," Proc. IEEE INFOCOM 2001, vol. 2, pp. 599-607, Jun. 2002.
    [26]. OPNET Technologies, Inc., OPNET Modeler 7.0.B, Bethesda, MD, Jun. 2000.
    [27]. S. Mangold, S. Choi, P. May, O. Klein, G. Hiertz, L. Stibor, " IEEE 802.11e Wireless LAN for Quality of Service," Proc. European Wireless, vol. 2, pp. 32-39, Feb. 2002
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