基于快速传输协议实现卫星TCP性能的改善

在经由卫星通信系统的网络应用中， TCP的性能较低。分段连接机制作为应用最广的一种性能优化方案，可以改善TCP端对端的性能，而在此机制中，卫星链路部分采用何种传输协议直接决定性能改善的效果。XTP协议是一种应用于有线网络的高速传输协议，但经过深入研究发现：XTP协议同样也非常适用于卫星通信系统。所以建议：在分段连接机制中，采用XTP协议作为卫星链路的传输协议。性能测试结果表明采用该建议非常显著地提高了端对端TCP的性能。

Performance improvement of TCP over satellite link based on the express transport protocol

In the network applications over satellite communication system,the TCP performance over satellite link is poor.The splitting TCP mechanism,which is widely applied,can improve the end-to-end performance of TCP.How to choose transport protocol for satellite link determines the performance of whole mechanism.The eXpress Transport Protocol(XTP),adopted in wire network,is a high speed transport protocol.After deep research for the protocol,it was found that XTP could be applicable to satellite communication.So XTP was proposed to be adopted as transport protocol on satellite link in splitting TCP mechanism.Experiment results show that the proposal can significantly improve the TCP performance over satellite link.