TCP Contention Control: A Cross Layer Approach to Improve TCP Performance in Multihop Ad Hoc Networks

Authors:
Ehsan Hamadani;Veselin Rakocevic
Affiliations:
Information Engineering Research Centre, School of Engineering and Mathematical Sciences, City University, London EC1V 0HB, UK;Information Engineering Research Centre, School of Engineering and Mathematical Sciences, City University, London EC1V 0HB, UK
Venue:
WWIC '07 Proceedings of the 5th international conference on Wired/Wireless Internet Communications
Year:
2007

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Abstract

It is well known that one of the critical sources of TCP poor performance in multihop ad hoc networks lies in the TCP window mechanism that controls the amount of traffic sent into the network. In this paper, we propose a novel cross layer solution called "TCP Contention Control" that dynamically adjusts the amount of outstanding data in the network based on the level of contention experienced by packets as well as the throughput achieved by connections. Our simulation results show TCP Contention Control can drastically improve TCP performance over 802.11 multihop ad hoc networks.