Coordinated TCP Westwood Congestion Control for Multiple Paths Over Wireless Networks
Multi-Path TCP (MPTCP) has just been approved by the IETF. It was designed to be fairly shared with regular TCP, so its performance is equivalent that of a regular TCP flow that on the best path for it. However, regular TCP has been proven its performance very poor in wireless networks, where packet loss often is caused by random error rather than by network congestion as in wired networks. TCP Westwood (TCPW) uses the available bandwidth estimation technique to improve TCP performance in such environment. In this paper, the authors propose an extended version of TCP Westwood for multiple paths, called MPTCPW.