On congestion control for streaming real-time applications over wireless networks with bandwidth variation

A congestion control algorithm for non-TCP flows such as streaming real-time applications should be TCP-friendly. In particular, in the wireless networks, TCP-friendly congestion control algorithm should be based on differentiation of packet losses due to congestion and wireless link error to improve the network utilization. Several algorithms in the wireless networks have been proposed to improve the networks performance. However, they do not consider the bandwidth variation. In particular, the abrupt increase of the bandwidth can cause network under-utilization. In this paper, we introduce a new TCP-friendly congestion control algorithm using the available bandwidth estimator over the wireless networks. We show that the proposed algorithm adapts the abrupt bandwidth variation rapidly, comparing with the existing algorithm. Moreover, the simulation results show that the proposed algorithm utilizes the link bandwidth efficiently.