The effects of asymmetry on TCP performance
MobiCom '97 Proceedings of the 3rd annual ACM/IEEE international conference on Mobile computing and networking
TCP behavior across multihop wireless networks and the wired internet
WOWMOM '02 Proceedings of the 5th ACM international workshop on Wireless mobile multimedia
Comparison of TCP Reno and Vegas in wireless mobile ad hoc networks
LCN '00 Proceedings of the 25th Annual IEEE Conference on Local Computer Networks
The Impact of Multihop Wireless Channel on TCP Performance
IEEE Transactions on Mobile Computing
Understanding bandwidth-delay product in mobile ad hoc networks
Computer Communications
TCP Vegas: end to end congestion avoidance on a global Internet
IEEE Journal on Selected Areas in Communications
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While TCP is highly successful in the wire-line Internet, its performance fast degrades as the number of hops increases in multihop wireless networks. It is due to not only the half-duplex nature of the wireless medium, but also the congestion spreading phenomenon. Congestion in one wireless link spreads over space rather than localized to a link, causing interference to packet transmissions on neighboring links. Therefore, the space-shared feature of multihop wireless network makes congestion control different from that in wired networks. Since TCP often errs in estimating congestion level due to the wireless interference, it can overly inflate the transmission window and blast packets into the network, resulting in high level of congestion. We propose a novel algorithm to detect congestion in multihop wireless networks, which enables TCP to adjust the window size precisely. Performance evaluation through simulations confirms the advantage of our proposal in detecting spatial congestion in multihop wireless networks.