On-Demand Multicast Routing Protocol in Multihop Wireless Mobile Networks

MSDP is the most practical inter-domain multicasting protocol. It uses periodic broadcast to inform of source location. This periodic broadcast not only consumes considerable network bandwidth but also causes potential delay for new subscribers who request the ongoing multicast service until inter-domain routing path is setup.This paper proposes an "On-Demand Source Active"(ODSA) method that relies on broadcasting much less than MSDP. ODSA disseminates source location to the distributed database servers while multicast groups refer the source location in response to customers' request with no delay. Our simulation shows ODSA saves more than half bandwidth for all cases we tested.