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研究生:鄔智仁
研究生(外文):Chih-Jen Wu
論文名稱:一個在無線多通道網路上的階層式分群通道分配方法
論文名稱(外文):A HIERARCHICAL CLUSTERING CHANNEL ASSIGNMENT SCHEME FOR MULTI-CHANNEL WIRELESS NETWORKS
指導教授:陳文村陳文村引用關係
指導教授(外文):Wen-Tsuen Chen
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:2005
畢業學年度:94
語文別:英文
論文頁數:40
中文關鍵詞:多通道通道分配無線網路分群
外文關鍵詞:Multi-ChannelChannel assignmentWirelenn NetworkClutering
相關次數:
  • 被引用被引用:0
  • 點閱點閱:153
  • 評分評分:
  • 下載下載:11
  • 收藏至我的研究室書目清單書目收藏:1
在一個高效能多通道無線網路(Multi-channel wireless networks)中, 通道分配(Channel assignment)是一個很重要的研究主題。在先前相關研究通道分配的法則中,大部份的通道分配法則是透過協商(Negotiation)的方式來交換彼此所需要的通道(Channel)。利用協商的方法主要是使用RTS/CTS的封包,內含通道列表(Channel list),傳送端(Sender)跟接收端(Receiver)會從通道列表中挑選適合的通道,並告知鄰近的結點,最後,傳送端跟接收端會使用先前挑選的通道來倲輸資料。然而,這些方法需要同步性(Synchronization)的機制,因為它們必須在同一個信標間距(Beacon interval)的開始時,去競爭(Contention)並做協商,但同步性機制在無線網路中,是很難以完成的。此外,協商式的通道分配法則會造成端點對端點之間的延遲(End-to-end delay)增加,特別是在多跳(Multi-hop)通訊中,這是因為在多跳傳輸中,每兩個節點之間的連結(Link)必須在協商後才分配通道,在協商的過程中會產生所謂的通道交換延遲(Channel switching delay),而在愈多級(Hop)的傳輸中,這樣子的延遲會更顯著。我們在本篇論文中,提出了一個以階層式分群(Hierarchical clustering)網路節點(Node)為基本的通道分配方法,且不需要任何同步機制。在我們的通道分配法則中,通道由最高階層的群長(Cluster head of highest level)開始從上往下分配通道,直到所有的成員(Member)都已分配好為止,並利用了通道不會互相干擾的特性,減少了大量的碰撞(Collision)。在模擬結果中,我們展示出我們的通道分配方則比協商式的通道分配法則在整體碰撞(Collision),端點對端點的延遲(End-to-end delay)及整體產出量(Throughput)有著明顯的改善。
Channel assignment is an important issue in high throughput multi-channel wireless networks. Previous works on channel assignment use a common control channel to negotiate data channels by exchanging RTS/CTS. However, these schemes require time synchronous mechanism for starting to negotiation in each contention window, which is hard to achieve in wireless networks. Moreover, the above negotiation-based scheme may incur the channel switching delay during channel assignment in each hop of a multi-hop communication. In this paper, we propose an asynchronous scheme for channel assignment based on clustering all nodes in a wireless network into a hierarchical clustering architecture. With the hierarchical clustering architecture, our scheme can elect the cluster head of highest level and allocates channels by the cluster head of highest level to all leaves in a level-by-level basis. Simulation results show that the proposed channel assignment scheme outperforms the negotiation-based schemes in terms of packet collision, end-to-end delay, and overall throughput.
ABSTRACT
CHAPTER 1 INTRODUCTION
CHAPTER 2 BACKGROUND AND RELATED WORKS
2.1 PREVIOUS CHANNEL ASSIGNMENT SCHEME
2.2 CHARACTERISTIC OF CHANNEL DIVERSITY
2.3 SUMMARY
CHAPTER 3 CHANNEL ASSIGNMENT SCHEME IN MULTI-CHANNEL MAC PROTOCOL DESIGN
3.1 HIERARCHICAL CLUSTERING
3.2 CHANNEL ASSIGNMENT
3.3 ENHANCEMENT OF TRAFFIC CONTROL
3.4 ROUTING DISCOVERY
3.5 SUMMARY
CHAPTER 4 SIMULATION RESULTS
CHAPTER 5 CONCLUSIONS
BIBLIOGRAPHY
[1] IEEE Std 802.11, 1999 Edition (R2003), Wireless LAN Medium Access Control (MAC) and Physical Layer (PHY) specifications. IEEE, Inc., New York, USA, 2003.
[2] IEEE Std 802.11b-1999, Wireless LAN Medium Access Control (MAC) and Physical Layer (PHY) specifications. IEEE, Inc., New York, USA, 1999.
[3] IEEE Std 802.11g-2003, Wireless LAN Medium Access Control (MAC) and Physical Layer (PHY) specifications. IEEE, Inc., New York, USA, 2003.
[4] M.R. Garey and D.S. Johnson, Computer and Intractability: A Guide to the theory of NP-Completeness, W.H. Freeman 1990.
[5] H. Zheng and C. Peng, “Collaboration and Fairness in Opportunistic Spectrum Access,” in Proc. IEEE ICC, Vol.c5, pp. 3132-3136, May 2005.
[6] S. Ramanathan, “A Unified Framework and Algorithm for Channel Assignment in Wireless Networks,” Wireless Networks Vol. 5, Issue 2, pp.81-94, March 1999.
[7] T. Hui, L. Y. Yang, H. J. Dong, and Z. Ping, “A MAC Protocol Supporting Multiple Traffic over Mobile Ad Hoc network,” in Proc. IEEE VTC 2003, Vol. 1, pp. 665-669, Apr. 2003.
[8] K. Liu, T. Wong, J. Li, L. Bu, and J. Han, “A Reservation-Based Multiple Access Protocol with Collision Avoidance for Wireless Multi-hop Ad hoc networks,” in Proc. IEEE ICC, Vol. 2, pp. 1119-1123, May 2003.
[9] J. So and N. Vaidya, “Multi-channel MAC for Ad Hoc Networks: Handling Multi-channel Hidden Terminals using a Single Transceiver,” in Proc. ACM MobiHoc, pp. 222-233, 2004.
[10] A. Raniwala, K. Gppalan, and T. C. Chiueh, “Centralized Channel Assignment and Routing Algorithms for Multi-Channel Wireless Mesh Networks,” ACM Mobile Computing and Communication Review, Vol. 8, pp.50-65, 2004.
[11] P. Kyasanur and N. H. Vaidya, “Routing and Interface Assignment in Multi-channel Multi-interface Wireless networks,” in Proc. IEEE WCNC, March 2005.
[12] A. Raniwala and T. C. Chiueh, “Architecture and Algorithms for an IEEE 802.11-Based Multi-Channel Wireless Mesh Network,” in Proc. IEEE INFOCOM 2005, Vol. 3, pp. 2223-2234, March 2005.
[13] R. Draves, J. Padhye, and B. Zill, “Routing in Multi-Radio, Multi-Hop Wireless Mesh networks,” in Proc. ACM MobiCOM, pp. 114-128. 2004.
[14] S. L. Wu, C.Y. Lin, Y.C. Tseng, and J. L. Sheu, “A New Multi-Channel MAC Protocol with On-Demand Channel Assignment for Multi-Hop Mobile Ad Hoc Networks,” in Proc. IEEE I-SPAN, pp. 232-237, Dec. 2000.
[15] D. B. Johnson and D. A. Maltz, “Dynamic Source Routing in Ad hoc Wireless Networks,” in Mobile Computing, Ch. 5, pp.153-181, 1996.
[16] J. Li, Z. J. Haas, M. Sheng, and Y. Chen, “Performance Evaluation of Modified IEEE 802.11 MAC for Multi-Channel Multi-Hop Ad Hoc Network,” in Proc. IEEE AINA, pp. 312-317, March 2003
[17] F. Fitzek, D. Angelini, G. Mazzini, and M. Zorzi, “Design and Performance of an enhanced IEEE 802.11 MAC protocol for Multi-hop Coverage Extension,” IEEE Wireless Communications, Vol. 10, pp. 30-39, Dec. 2003
[18] L. Cao and H. Zheng, “Distributed Spectrum Allocation via Local Bargaining,” in Proc. IEEE SECON, Sep. 2005
[19] B.J. Ko and D. Rubenstein, ”Distributed, Self-Stabilizing Placement of Replicated Resources in Emerging Networks,” in Proc. IEEE ICNP, pp. 6-15, Nov. 2003
[20] K. Perekh and R. Gallager A, “Generalized Processor Sharing Approach to Flow Control in Integrated Services Network: The Signal-Node Case," IEEE Trans. Networking, vol. 1, no. 3, pp. 344-357, June 1993.
[21] S.T. Sheu, T. Chen, J Chen, and F.Ye, “An Improved Data Flushing MAC Protocol for IEEE 802.11 Wireless Ad Hoc Network,” in Proc. IEEE VTC 2002, pp 2435-2439, Sep. 2002.
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