Intra-layered Multicast Based on Competition Probability

Intra-layered multicast uses fixed sending rate interval for each layer, and a delegate of the receivers is selected in the layer for adjusting the layerpsilas sending rate. Sender adjusts layerpsilas sending rate within the layer rate interval according to the delegatepsilas rate. A scheme based on competition probability formula for delegate selection is proposed in this paper. Two factors determine whether the current feedback receiver can be selected as the delegate. One is the related difference between feedback rate and current layerpsilas sending rate, the other is the approximately rate distribution of receivers in the layer. The scheme can reduce layerpsilas sending rate drop when receivers with high available bandwidth are dominant in the layer. Simulation results show that the scheme can meet most of receiverspsila demand within a layer, and is TCP friendly.