With the increase of multicast data applications, research interests have been focused on the design of congestion control scheme for multicast communications. One challenge comes from the heterogeneous multicast receivers, especially those with large propagation delays, which means the feedbacks arriving at the source node are somewhat outdated and harmful to the control actions. To attack this problem, this paper describes a novel multicast congestion control scheme, which is based on the proportional plus neural network (PNN) predictive tech...