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研究生:王邑倩
研究生(外文):Yi-Chien Wang
論文名稱:提供串流服務之多通道無線行動隨意網路媒體存取控制協定
論文名稱(外文):A Modified MAC Protocol for Streaming Services in Wireless Multi-Channel Mobile Ad Hoc Networks
指導教授:蔡育仁蔡育仁引用關係
指導教授(外文):Prof. Yuh-Ren Tsai
學位類別:碩士
校院名稱:國立清華大學
系所名稱:通訊工程研究所
學門:工程學門
學類:電資工程學類
論文種類:學術論文
論文出版年:2004
畢業學年度:92
語文別:英文
論文頁數:63
中文關鍵詞:串流服務無線通訊隨意網路行動通訊
外文關鍵詞:Streaming ServiceWirelessAd HocMANETmulti-channel802.11 MAC
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近年來無線區域網路科技快速竄起,不論是企業或是家庭用戶,使用無線網路已蔚為風潮。由於它不需拉設實體線路,而是以無線電波為傳輸媒介,適合不便架設有線網路的環境、或臨時性的網路,不僅省去佈線工程,又因其機動性、移動性高,更便於需經常移動位置的使用者。802.11標準允許網路通訊以點對點(peer-to-peer)方式進行連接,不需經由無線網路存取器(AP),個人電腦可透過無線網路卡對無線網路卡直接互通,非常簡單方便。
在同一電波通道涵蓋範圍中,只允許一對電腦互做傳送接收,以避免同頻干擾導致資料收送發生錯誤,隨著同一區域使用者及資料量的增加,會造成整個網路的總吞吐量下降,尤其在使用單一頻道的系統中特別嚴重,近年來有許多的研究致力於多通道分配,以提供較有效率的傳輸服務。而我們所提出的協定-DCSS(Dedicated Channel for Streaming Service),旨在對於某條路徑提供傳輸大量資料的前提下,如何更新現有的IEEE Standard 802.11 MAC Protocol,以提供串流服務給該高載路徑上的使用者,進而提升Ad Hoc網路的效能。在同一電波通道涵蓋範圍中,只允許一對電腦互做傳送接收,以避免同頻干擾導致資料收送發生錯誤,不需拉設實體線路,而是以無線電波為傳輸媒介,適合不便架設有線網路的環境、或臨時性的網路,不僅省去佈線工程,又因其機動性、移動性高,更便於需經常移動位置的使用者。
Compared with the infrastructure which contains one or more APs (access points), the mobile ad hoc network (MANET) is a network composed solely of mobile stations. In MANET, a pair of hosts within mutual communication coverage can directly communicate with each other via the wireless medium (WM). To avoid co-channel interference, adjacent neighbors of each host of the pair in communication will not be allowed to access to the medium until the communication is finished. In other words, different pairs of hosts can access to one same channel simultaneously if their communication coverage is not overlapped. Hosts that simultaneously carrying information to be transferred with communication coverage overlapped to each other should contend for the medium. In system models based on single-channel MAC protocols, the performance of the entire network gets diminished as a result of the increasing number of mobile hosts. Throughput is limited especially when there is heavy traffic for one host to deliver to another. In order to improve the system performance and to raise the total throughput of the entire system, we propose a new multi-channel assignment ad hoc network protocol based on IEEE 802.11 [1] named the Dedicated Channel for Streaming Services (DCSS).
[1] Part 11: Wireless LAN Medium Access Control (MAC) and Physical Layer (PHY) Specifications, IEEE Std. 802.11, 1999.
[2] D. Lopez-Rodriguez and R. Perez-Jimenez, “Distributed Method for Channel Assignment in CDMA Based “AD-HOC” Wireless Local Area Networks,” 1999 IEEE MTT-S International Topical Symposium on Technologies for Wireless Applications, Vancouver, BC, Canada, 21-24 Feb. 1999.
[3] S.-L. Wu, C.-Y. Lin, Y.-C. Tseng, and J.-P. Sheu, “A New Multi-Channel MAC Protocol with On-Demand Channel Assignment for Multi-Hop Mobile Ad Hoc Networks,” Proc. I-SPAN 2000, pp. 232–237, 2000.
[4] Z. Cai and M. Lu, “SNDR: A New Medium Access Control for Multi-channel Ad Hoc Network,” 51th IEEE Vehicular Technology Conference, Tokyo, Japan, 15-18 May 2000.
[5] S.-H. Hsu, C.-C. Hsu and F.-C. Lin, "A Reliable Multi-Channel MAC Protocol with Efficient Multicast Support for Ad hoc Networks," in Proceeding of 4th International Workshop on Mobile and Wireless Communications Network, Sweden, Sep. 2002.
[6] C.Y. Chang, C.T. Chang, P.C. Huang, “Dynamic Channel Assignment and Reassignment for Exploiting Channel Reuse Opportunities in Ad Hoc Wireless Networks”, The 8th International Conference on Communication Systems, vol. 2 , pp. 1053-1057, Nov. 2002.
[7] C. E. Perkins and P. Bhagwat, “Highly Dynamic Destination-Sequenced Distance-Vector Routing (DSDV) for Mobile Computers,“ Comp. Commun. Rev., Oct. 1994, pp. 234-44.
[8] C.-C. Chiang, “Routing in Clustered Multihop, Mobile Wireless Networks with Fading Channel, “Proc. IEEE SICON ’97, Apr. 1997, pp. 197-211.
[9] S. Murthy and J. J. Garcia-Luna-Aceves, “An Efficient Routing Protocol for Wireless Networks,” ACM Mobile Networks and App. J., Special Issue on Routing in Mobile Communication Networks, Oct. 1996, pp. 183-97.
[10] C. L. Fullmer and J. J. Garcia-Luna-Aceves, “Solutions to Hidden Terminal Problems in Wireless Networks,” in Proc. ACM SIGCOMM ’97, 1997, pp. 39–49.
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