THE ADAPTIVE UDP CONGESTION MECHANISM WITH THE MINIMUM RATE GUARANTEES

With the increasing of real time multimedia traffic in Internet, such as video and audio applications, the end to end congestion control is becoming more and more important.The applications based on UDP generally need minimum rate guarantees and they must support tcp friendly congestion control in order to avoid congestion collapse. In this paper, a congestion scheme is presented, which supports minimum rate guarantees. The mechanism includes the end to end congestion control and the gateway queue management. The end host provides packet policing and marking function through token bucket, and the enhanced RED gateway differentiates the marked and unmarked packets. The experimental results are shown and the performance evaluation is presented by comparing the mechanism with relative schemes. This mechanism is proved to be feasible and fair.