A SIP-based multicast framework in MANET

Mobile ad-hoc network (MANET) is an active topic of research for its potential of providing pervasive services anywhere and anytime, even though some challenges need to be handled first. In this paper, we propose an overlay multicast framework to handle multicasts in MANET environment in a flexible way. Our approach is using SIP to discover peers to set up a meshed overlay network first, then overlay multicast trees are set up on demand. To cope with the bandwidth limitation problem, the meshed clustering structure is adopted, so that the virtual meshed network topology gradually adopts the changes in the underlying network in a distributed manner and the multicast tree is adapted to the updated topology information accordingly.