Cost-balance overlay multicast routing using dynamic estimation

This paper presents a cost-balance overlay multicast routing scheme (Cost-Balance) to the metrics tradeoff problem between overlay path delay and access bandwidth at Multicast Server Nodes (MSN) for real-time applications over Internet. Besides dynamically estimating these two metrics for better stability and implementing a dynamic priority to MSNs by weighing the size of its service clients for better efficiency, Cost-Balance tradeoffs overlay path delay and MSN access bandwidth by carefully selecting a ´less-MSN-access-bandwidth´ path within minimum-delay overlay paths to lessen MSN access bandwidth as much as possible. Simulation experiments demonstrate the scheme achieves better performance in terms of metrics tradeoff and routing stability.