无线网络TCP拥塞控制算法研究综述

摘要

随着WiFi,3G网络和无线设备的普及,无线通信传输数据亮不断增加。对无线网络数据传输的性能要求也不断加大。TCP作为现今internet网络主要传输控制协议之一，在IP层基础上为应用层提供面向连接的、可靠的数据传输服务。 TCP在有线网络中已经证明可以取得良好的传输性能，然而在无线网络中(蜂窝网络、Ad hoc网络和卫星网络等)由于无线信道具有高衰减、高比特误码率的特点等因素导致TCP传输性能衰弱。目前国内外学者已经提出了各种不同的方法来提高无线网络中 TCP性能，本文着重讨论在蜂窝网络、wifi 网络下提升无线 TCP 性能的解决方案，对比标准 TCP协议，分析造成无线网络TCP性能下降的主要原因以及各无线网络TCP解决方案的性能。%With the popularity of WiFi/3G network and wireless devices, wireless transmission is increasing. TCP is one of the core protocols of the Internet protocol suiteand provides a reliable data transmission service to the application layer. TCP has been optimized for wired networks. However, the Performance of TCP decrease in wireless network due to fad-ing, shadowing, hand off, and other radio effects, that cannot be considered congestion. This article focuses on the perfor-mance of wireless TCP in a cellular network and WiFi network, compared to standard TCP protocol, analyses the reason of TCP performance degradation in wireless network and introduces existing solutions that enhancing the performance of TCP wireless.