Protocol independent multicast group aggregation scheme for the global area multicast
Sejun Song, Zhi-Li Zhang, Baek‐Young Choi, D.H.C. Du · 2000
IP multicast is an important enabling service for the current and future Internet. With the explosive growth of the Internet, a challenging issue facing IP multicast is scalability, in particular, the problem of multicast forwarding state and control explosion. In this paper, we propose a new methodology to address the multicast scalability problem for backbone domains-multicast tunneling with branch filtering (MTBF). This multicast group aggregation scheme is designed on top of the inter-domain protocol architecture such as MASC/BGMF, and is independent of any underlying intra-domain multicast protocols. It aggregates multicast groups by constructing bolder router (BR)-based multicast routing trees and forwards data by using an encapsulation technique called multicast tunneling (MT). The feasibility and performance of our scheme is demonstrated through analysis and simulations.