Abstract: In order to improve the Transmission Control Protocol(TCP) performance over wireless networks, the possible reasons of data loss for Ad Hoc network is discussed and the efficient of loss differentiation scheme is proposed. It designs the scheme of detection based on one-way trip time of duplicate Ack. According to the scheme, the sender can adopt immediately the appropriate congestion control. Simulation results show that the proposed scheme can improve the TCP performance efficiently.

Key words: Ad Hoc network, Transmission Control Protocol(TCP), wireless lost packet, congestion lost packet, performance improvement

摘要： 为改进传输控制协议(TCP)在无线网络环境下的性能，分析Ad Hoc网络数据丢失的原因，提出一种区分无线丢包和拥塞丢包的算法。该算法通过在发送端检测返回的重复Ack的相对单向传输时延，探测到网络真实的拥塞状况，以便采取合理的拥塞控制措施。仿真结果表明，该算法能够正确区分无线丢包和拥塞丢包，改善Ad Hoc网络的TCP性能。

关键词: Ad Hoc网络, 传输控制协议, 无线丢包, 拥塞丢包, 性能改进

CLC Number: 

• TP393