AMID-based congestion control for layered multicast

It is a key subject for layered multicast congestion control to promise fair bandwidth sharing. An AIMD-based congestion control algorithm for layered multicast is presented. The algorithm makes use of the AIMD algorithm, which is proved to have good TCP-compatibility and stability. To prevent rate oscillation by halving the sending rate in TCP. the algorithm adapts the principle of slow-increase and slow-decrease. We present a new feedback-free method for multicast receivers to estimate their round-trip time to the sender. which avoids complexity and scalability of feedback processing. A slow-start mechanism like TCP is adapted to promote bandwidth utilization and rate convergence. The simulation evaluations show that the algorithm achieves fair congestion control between TCP flows and multicast flows. and his high bandwidth utilization and good stability.