文章基本信息

标题：Comparative Performance Evaluation of TPA over TCP Protocol in MANETs
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作者：D. Srinivasa Rao ; P. Lavanya Kumari
期刊名称：International Journal of Computer Science & Technology
印刷版ISSN：2229-4333
电子版ISSN：0976-8491
出版年度：2011
卷号：2
期号：1
出版社：Ayushmaan Technologies
摘要：Providing efficient transport services over multi-hop ad hoc networks is a fundamental building block for this wireless technology. Existing network transport protocols such as TCP and UDP have limitations when fitting into new technologies includes, e.g., increased heterogeneity and mobility. The TCP protocol exhibits poor performance in multi-hop Mobile Ad Hoc Networks (MANETs).The ultimate reason for this is that MANETs behave in a significantly different way from traditional wired networks, like the Internet, for which TCP was originally designed. In particular, route failures and route changes due to node mobility may be frequent events in MANETs. Furthermore, congestion phenomena in MANETs are essentially different from traditional wired networks .In this paper we propose a novel transport protocol – named TPA specifically tailored to the characteristics of the MANET environment. Unlike other proposals, our protocol is not a modification of the TCP but is specifically tailored to the characteristics of the MANET environment. It is based on a completely new congestion control mechanism, and designed in such a way to minimize the number of useless transmissions and, hence, power consumption. Furthermore, it is able to manage efficiently route changes and route failures. We then compare TCP and TPA through field tests, in terms of throughput and total number of transmitted segments. Our experimental results show that, in the analyzed scenarios, TPA always outperforms TCP in a significant way both in terms of throughput and energy consumption. We show through ns2 based simulations that TPA outperforms both default TCP and TCP-ELFN.
关键词：Ad Hoc Networks; Mobility; Transport Protocols; TCP; UDP