Abstract: In order to solve the unstable performance of TCP in wireless network or the heterogeneous network, this paper presents a packet error detection mechanism based on Vegas protocol. It extends TCP Vegas header option and allows the receiver to return a special ACK generated in response to packet corruption. It holds peer-to-peer semantic of TCP Vegas protocol, need not mend base station or middle node. NS2 simulation experimental shows that distinguish packet corruption from congestion, avoid lots of unwanted timeouts caused by retransmitted packet to be corrupted and hence, and enhances transmission performance.

Key words: network congestion, TCP Vegas protocol, packet error, wireless network, heterogeneous network

摘要： 为解决无线或异质网络中TCP拥塞控制性能不稳定的问题，提出一种基于Vegas协议的包错误检测机制。该机制扩展了TCP Vegas头部选项并允许接收端返回一个发生包错误的特殊ACK给TCP发送端，保留TCP Vegas机制端对端的语义，无须修改基站或中间节点。NS2模拟实验表明，该机制可区分包丢失的原因，能较好避免由包错误产生的超时重传，提高传输性能。

关键词: 网络拥塞, TCP Vegas协议, 包错误, 无线网络, 异质网络

CLC Number: 

• TP393