摘要： 传统TCP协议直接应用于混合网络会导致网络性能下降，基于带宽估算的TCPW协议是一种端到端的解决方案。针对TCPW协议带宽估算不够准确的问题，利用介质访问控制层的请求发送次数作为拥塞度量，提出TCPW协议的跨层优化设计。仿真结果表明，该优化设计的总吞吐量和公平性相比TCPW协议分别提高了23.8%和2.5%。

关键词: 混合网络, 介质访问控制, 跨层设计, TCPW协议, 请求发送

Abstract: The performance of traditional TCP protocol is much discounted over hybrid network. TCP Westwood(TCPW) protocol is an end-to-end solution based on bandwidth estimation. Aiming at the problem of inaccurate bandwidth estimation for TCPW protocol, this paper proposes a cross-layer optimized design, uses times of Request To Send(RTS) of Media Access Control(MAC) layer as a congestion metric. Simulation results show that this optimized design can improve performance of the total throughput and fairness respectively by 23.8% and 2.5% than TCPW protocol.

Key words: hybrid network, Media Access Control(MAC), cross-layer design, TCP Westwood(TCPW) protocol, Request To Send(RTS)

中图分类号: 

• TP393