Analysis and improvement of fairness between TCP Reno and Vegas for deployment of TCP Vegas to the Internet

Go Hasegawa, Kenji Kurata, Masayuki Murata

Research output: Contribution to conferencePaperpeer-review

63 Citations (Scopus)


According to the past researches, a TCP Vegas version is able to achieve higher throughput than TCP Tahoe and Reno versions, which are widely used in the current Internet. However, we need to consider a migration path for TCP Vegas to be deployed in the Internet. In this paper, by focusing on the situation where TCP Reno and Vegas connections share the bottleneck link, we investigate the fairness between two versions. From the analysis and the simulation results, we find that the performance of TCP Vegas is much smaller than that of TCP Reno as opposed to an expectation on TCP Vegas. The RED algorithm improves the fairness to some degree, but there still be an inevitable trade-off between fairness and throughput. Accordingly, we next consider two approaches to improve the fairness. The first one is to modify the congestion control algorithm of TCP Vegas, and the other is to modify the RED algorithm to detect misbehaved connections and drop more packets from those connections. We use both of analysis and simulation experiment for evaluating the fairness, and validate the effectiveness of the proposed mechanisms.

Original languageEnglish
Number of pages10
Publication statusPublished - 2000
Event2000 International Conference on Network Protocols - Osaka, Jpn
Duration: 2000 Nov 142000 Nov 17


Conference2000 International Conference on Network Protocols
CityOsaka, Jpn


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