Locality based Core Selection for Multicore Shared Tree Multicasting
  Multicasting can be done in two different ways: source based tree approach and shared tree approach. Protocols such as Core Based Tree (CBT), Protocol Independent Multicasting Sparse Mode (PIM-SM) use shared tree approach. Shared tree approach is preferred over source-based tree approach because in the later construction of minimum cost tree per source is needed unlike a single shared tree in the former approach. In this paper, we present a candidate core selection approach for shared tree multicasting so that in a multicast session different senders can select different cores from the candidate core set based on the senders' physical locations to allow an efficient multicore multicasting approach. 
Koushik Sinha, Bidyut Gupta, Shahram Rahimi and Ashraf Alyanbaawi
cs.NI