Enhanced TCP Vegas Protocol and Its Application in Wireless Networks
Gang Wei · Science Technology and Engineering · 2007
An enhanced TCP VEGAS congestion control algorithm is proposed for wireless networks.To identify the packet loss and time-delay jitter caused by the wireless channel,the transmitter estimates the congestion probability based on the ec_bit in the ACK packets.In case of packet loss,the transmitter will not reduce the congestion window if the congestion probability does not increase.At the same time,a low-pass filter is applied to smooth the RTT,so as to remedy the time-delay jitter,and the filted RTT is used for standard VEGAS congestion control.Simulation results based on NS-2 demonstrate the efficiency of the proposed algorithm.