文章基本信息

标题：Improving TCP Performance Over Wireless Network With Frequent Disconnections
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作者：Purvang Dalal ; Nikhil Kothari ; K. S. Dasgupta 等
期刊名称：International Journal of Computer Networks & Communications
印刷版ISSN：0975-2293
电子版ISSN：0974-9322
出版年度：2011
卷号：3
期号：6
DOI：10.5121/ijcnc.2011.3611
出版社：Academy & Industry Research Collaboration Center (AIRCC)
摘要：Presented in this paper is the solution to the problem that arises when the TCP/IP protocol suite is used to provide Internet connectivity through mobile terminals over emerging 802.11 wireless links. Taking into consideration the strong drive towards wireless Internet access through mobile terminals, the problem of frequent disconnections causing serial timeouts is examined and analyzed, with the help of extensive simulations. After a detailed review of wireless link loss recovery mechanism and identification of related problems, a new scheme with modifications at link layer and transport layer is proposed. The proposed modifications which depend on interaction between two layers (i) reduce the idle time before transmission at TCP by preventing timeout occurrences and (ii) decouple the congestion control from recovery of the losses due to link failure. Results of simulation based experiments demonstrate considerable performance improvement with the proposed modifications over the conventional TCP, when a wireless sender is experiencing frequent link failures
关键词：Serial Timeouts; Loss recovery; Retry Limit; Fast Retransmit; Intermittent Connectivity; Bit Error Rate;Round Trip Time