NDLI: Vegas-W: An Enhanced TCP-Vegas for Wireless Ad Hoc Networks

Content Provider	IEEE Xplore Digital Library
Author	Lianghui Ding Xinbing Wang Youyun Xu Wenjun Zhang Wen Chen
Copyright Year	2008
Description	Author affiliation: Dept. of Electron. Eng., Shanghai Jiaotong Univ., Shanghai (Lianghui Ding; Xinbing Wang; Youyun Xu; Wenjun Zhang; Wen Chen)
Abstract	The performance of TCP-Vegas is not satisfactory in multihop ad hoc networks over IEEE 802.11 MAC protocol. We analyze the problem with a unified network model and simulation results. We observe that the aggregate throughput of all traffics decreases as the load of the network increases. The main reasons lie in Vegas's large minimum congestion window, large reset slow start threshold and aggressive window increase policy. To fix these problems, we propose a modified TCP protocol based on TCP-Vegas for multihop ad hoc networks, called Vegas- W. We extend the congestion window to fraction; change the probing mechanisms of legacy TCP-Vegas in both slow start and congestion avoidance and update slow start threshold tracking the stable window. We evaluate the performance of Vegas-W through ns-2. Extensive simulation results under a variety of scenarios show that Vegas-W can improve the throughput up to 87% over legacy TCP-Vegas and up to 27% over FeW, which is another improved algorithm based on TCP-Newreno scenarios.
Starting Page	2383
Ending Page	2387
File Size	329883
Page Count	5
File Format	PDF
ISBN	9781424420759
DOI	10.1109/ICC.2008.453
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2008-05-19
Publisher Place	China
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Mobile ad hoc networks Spread spectrum communication Ad hoc networks Throughput Analytical models Transport protocols Media Access Protocol Wireless networks Communications Society Performance evaluation
Content Type	Text
Resource Type	Article

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