SEM: a new small group multicast routing protocol

Several multicast mechanisms, known as small group multicast, were proposed that scale better with the number of multicast sessions than traditional multicast does. We propose a new approach, simple explicit multicast (SEM), which uses an efficient method to construct multicast trees and deliver multicast packets. SEM is original because it adopts the source-specific channel address allocation, reduces forwarding states in non-branching node routers and implements data distribution using unicast trees.