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多跳无线与有线混合网络中TCP性能改进研究综述

期刊名称：计算机研究与发展
时间：0
页码：738-746
语言：中文
分类：TP393[自动化与计算机技术—计算机应用技术;自动化与计算机技术—计算机科学与技术]
作者机构：[1]中南大学信息科学与工程学院,长沙410083
相关基金：国家自然科学基金项目（60673164,60873265）;湖南省杰出青年基金项目（06JJ0009）;高等学校博士学科点专项科研基金项目（20060533057）;国家“九七三”重点基础研究发展计划基金项目（2008CB317107）;教育部新世纪优秀人才支持计划基础项目（NCET-05-0683）
相关项目：基于网络编码的无线网络安全性与可靠性研究

关键词：混合网络, 传输控制协议, SANET, MANET, TCP性能, hybrid networks, transmission control protocol （TCP）, static ad hoc networks （SANET）, mobile ad hoc networks （ MANET）, TCP performance

中文摘要：

多跳无线与有线混合网络中，数据流通过的传输媒体各不相同，这些差异会严重影响TCP性能．为了提高有线与无线混合网络中TCP协议的性能，研究者对混合网络TCP协议进行了大量的研究，主要是通过修改标准TCP协议，使之适合于混合网络环境，设计方法主要有分层设计与跨层设计两种．分析了多跳无线与有线混合网络的特点；探讨了多跳无线与有线混合网络中影响TCP性能的主要因素、TCP所要解决的主要问题，以及改进TCP性能面临的难点；对当前改进混合网络中TCP效率、公平性等方面的研究成果进行了分析和总结，并指出了多跳无线与有线混合网络中TCP进一步研究的重点．

英文摘要：

Standard TCP （Transmission Control Protocol） has limitations when it is used in wired and multi-hop wireless hybrid networks environment. Transmission media carrying data present a wide range of characteristics in multi-hop wireless and wired hybrid networks, some of which may cause a degradation of TCP performance. Much work has been conducted on the performance of TCP under different networks environment. A lot of efforts are made to improve the performance of TCP over wireless and wired hybrid networks. Most of them adapt TCP to multi-hop wireless and wired hybrid networks by modifying the standard TCP. Two main approaches are proposed： one focuses on the modification of one layer of OSI model, namely layered design. and the other improves TCP performance by modifying multi-layer, namely cross-layer design. In this paper, some different characteristics between wireless networks and wired networks are analyzed, then some key factors that influence TCP performance under wireless networks are discussed, and some difficult issues are pointed out to improve the performance of TCP over wired and wireless hybrid networks. Some research work about TCP performance under wired and wireless networks environment is analyzed and summarized. Finally, some possible research trends of the development of TCP over multi-hop wireless and wired hybrid networks in the future are proposed.

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