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Bandwidth-Efficient Multicast
Routing Protocol
Tree Initialization Phase
Route Optimization Phase
Mesh-based protocols
Core-Assisted Mesh Protocol (CAMP
Bandwidth-Efficient Multicast Routing Protocol
Bandwidth efficient multicast routing protocol (BEMRP) tries to find the nearest forwarding node, rather than the shortest path between source and receiver.
Hence, it reduces the number of data packet transmissions. To maintain the multicast tree, it uses the hard state approach, that is, to rejoin the multicast group, a node transmits the required control packets only after the link breaks. Thus, it avoids periodic transmission of control packets and hence bandwidth is saved. To remove unwanted forwarding nodes, route optimization is done, which helps in further reducing the number of data packet transmissions.
Mesh-based protocols
The Mesh-based protocols is used to overcome the limitations of tree-based protocol such as scalability (in number of sources) and robustness. The protocol, a structure with higher connectivity is necessary that can connect multiple sources to their destinations.
