TCP Method for controlling a congestion window for multi path TCP in heterogeneous network

摘要

A congestion window control method of a multi-path transmission control protocol (TCP) in a heterogeneous network, the congestion window control method comprising: increasing a congestion window size when packet transmission / reception is normally performed without packet loss; And decreasing the size of the congestion window when a packet loss occurs, wherein a reduction factor for reducing the size of the congestion window is determined differently according to the throughput of each sub-flow, and the reduction factor of the sub- It is determined to have a larger value than the decrease factor of the lower sub-flow, so that the decrease in the congestion window size of the sub-flow is reduced. According to the present invention, it is possible to improve the traffic mobility by reducing the recovery time from failure in the path with the smallest congestion, and to increase the throughput of the MPTCP in the heterogeneous network. It also improves fairness in separate bottleneck scenarios for competing TCP and MPTCP protocols, and improves throughput in shared bottleneck scenarios