TCP Vegas-like Expert-Controlled Multicast Congestion Control Algorithm for Wireless Networks

In order to improve the performance of existing multicast congestion control algorithm applied to wireless networks, in this paper, a TCP Vegas-like expert-controlled multicast congestion control mechanism (VEMCC) is proposed, which uses a recently proposed TCP Vegas throughput model. In VEMCC, the network congestion state is detected according to network relative queuing delay and packet loss; the packet loss reason is distinguished between wireless link errors and network congestion; and the current state of the network is judged accurately; then different multicast source control strategies are taken to adjust the sending rate. The simulation results show that, VEMCC algorithm enhances the capability to distinguish between network congestion and random errors, and improves the network throughput. VEMCC can be applied to wireless networks well, and achieve some extent on TCP-friendliness over low packet error rate wireless link.