Browse > Article

New Contention Window Control Algorithm for TCP Performance Enhancement in IEEE 802.11 based Wireless Multi-hop Networks  

Gi In-Huh (Department of Information and Communications Engineering, Chungnam National University)
Lee Gi-Ra (Department of Information and Communications Engineering, Chungnam National University)
Lee Jae-Yong (Division of Electrical and Computer Engineering, Chungnam National University)
Kim Byung-Chul (Division of Electrical and Computer Engineering, Chungnam National University)
Publication Information
Journal of the Institute of Electronics Engineers of Korea TC / v.43, no.9, 2006 , pp. 165-174 More about this Journal
Abstract
In this paper, we propose a new contention window control algorithm to increase TCP performance in wireless multi-hop networks. The new contention window control algorithm is suggested to reduce the hidden and exposed terminal problems of wireless multi-hop networks. Most of packet drops in wireless multi-hop networks results from hidden and exposed terminal problems, not from collisions. However, in normal DCF algorithm a failed user increases its contention window exponentially, thus it reduces the success probability of fined nodes. This phenomenon causes burst data transmissions in a particular node that already was successful in packet transmission, because the success probability increases due to short contention window. However, other nodes that fail to transmit packet data until maximum retransmission attempts try to set up new routing path configuration in network layer, which cause TCP performance degradation and restrain seamless data transmission. To solve these problems, the proposed algorithm increases the number of back-of retransmissions to increase the success probability of MAC transmission, and fixes the contention window at a predetermined value. By using ns-2 simulation for the chain and grid topology, we show that the proposed algorithm enhances the TCP performance.
Keywords
Wireless multi-hop network; TCP; Hidden terminal; Contention Window control;
Citations & Related Records
연도 인용수 순위
  • Reference
1 D. B. Johnson, D. A. Maltz, Y. Hu, 'Dynamic Source Routing Protocol for Mobile Ad Hoc Networks(DSR)', Internet Draft , April 2003
2 Perkins, C., Belding-Royer, E., and S. Das, 'Ad hoc On-demand Distance Vector (AODV) Routing', RFC 3561, July 2003
3 S. M. ElRakabawy, C. Lindemann, M. K. Vernon, 'Improving TCP Performance for Multihop Wireless Networks,' IEEE DSN'05, 2005   DOI
4 C. E. Perkins, 'AD HOC NETWORKING', Addison Wesley, 2001
5 E. M. Royer and C. Toh, 'A review of current routing protocols for Ad-hoc mobile wireless networks', IEEE Personal Communications, pp.207-218, April 1999   DOI   ScienceOn
6 K. Chandran, S. Raghunathan, S. Venkatesan, P. Prakash, 'A Feedback-Based scheme for Improving TCP Performance in Ad Hoc wireless Networks', IEEE Personal Communications, February 2001   DOI
7 The Editors of IEEE 802.11. IEEE Standard for Wireless LAN Medium Access Control(MAC) and Physical Layer(PHY) specifications, November. 1997
8 S. Xu, T. Saadawi, 'Revealing the problems with 802.11 medium access control protocol in multi-hop wireless ad hoc networks,' Computer Networks 2002   DOI   ScienceOn
9 Ns-2, http://www.isi.edu/nsnam/ns/