Aggregation of multicast-related information in large scale multicast routing

Not only the topology state information but also the state information about multicast tree should be aggregated in large scale multicast routing, which raises the multicast tree state information aggregation (MTSA) problem. This paper discusses this problem deeply and roundly, including: giving the definition of multicast tree state information (MTSI) with delay-bandwidth constraints; proposing pseudo tree border node (PTBN) mode to solve the aggregation of MTSI; proposing layer band representation points method to compress multi MTSIs which is used in a concrete PTBN aggregation process. This paper analyzes the compression effect of PTBN method to show that the domain's MTSIs after PTBN aggregation will not surge greatly with the domain network size while the aggregated MTSIs does not influence the success ratio of multicast routing.