摘要： 在传统的无线网络传输控制协议中，错误调用拥塞控制机制会导致性能下降。针对该问题，提出一种改进的TCP协议(TCP-FR)。通过判断数据相对传输时间的延迟趋势，区分网络拥塞丢包和无线链路误码丢包，并根据拥塞程度划分网络拥塞等级，动态调整拥塞窗口的大小。仿真结果表明，该协议可保证网络对拥塞判断的准确性，并提高网络的信道利用率和吞吐量。

关键词: 传输控制协议, 无线网络, 相对传输延迟, 拥塞等级, 吞吐量

Abstract: Traditional Transmission Control Protocol(TCP) calling congestion control mechanism in error in wireless networks leads to performance reduction. This paper presents an improved TCP protocol(TCP-FR) to improve this problem. The protocol distinguishes network congestion packet loss and link error packet loss by the trend of data relative transmission time delay. It divides network congestion level according to the degree of network congestion and adjusts the size of congestion window dynamically. Simulation results show that the algorithm improves the accuracy of network congestion judgment, and effectively improves the channel utilization and throughput of the network.

Key words: Transmission Control Protocol(TCP), wireless network, relative transmission delay, congestion level, throughput

中图分类号: 

• TP393