An Improved Multicast Routing Protocol Based on Fuzzy Clustering

The routing topology optimization is one focus of overlay multicast research. To improve the routing scalability issue, this paper proposed an improved multicast routing protocol based on fuzzy clustering (FHRouting) to construct a hierarchical topology tree for the routing optimization in overlay network. The scheme firstly formulated the issue as a degree-restraint minimal latency optimization and utilized RTT of MSNs (multicast service node) as the metric for the topology hierarchical clustering. And then it selected a fuzzy clustering method to divide all the MSNs into several groups to optimize the clustering performance for the better construction in the multicast routing topology. Finally the scheme formed the hierarchical topology tree by applying a multicast SPT (MSPT) method to achieve the scalable routing topology. The experiments illustrated that the proposed scheme indicated better robust clustering performance and scalable routing performance compared with MSPT.