18-08-2012, 01:26 PM
multicast routing in ad hoc wireless networks
Multicast Routing in Ad Hoc Wireless Networks.pptx (Size: 1.84 MB / Downloads: 41)
Bandwidth Efficient Multicast Routing Protocol
Becuase of highly bandwidth-scarce environment in Ad Hoc Networks, Bandwidth efficiency is one of the key design criteria. BERPM tries to find the nearest forwarding node rather than shortest path.
* It avoids periodic transmission of control packets and hence banswidth is saved.
* It uses the Hard-state approach and Receiver –initiation
* It has three phases ( Tree Initializaion phase, Tree maintenance Phase and Route optimization Phase)
Tree Initialization Phase
It initiates flooding of
Join control packets.
*The members of the multicast tree, respond with Reply packets.
*When many such Reply packets reach the requesting node, it chooses one of them and sends a Reverse packet on the path taken by the chosen reply packet.
Route optimization Phase
When a tree node or a receiver node comes within the transmission range of other tree nodes, then unwanted tree nodes are pruned by sending the Quit message.
Multicast Ad Hoc On-Demand Distance Vector Routing Protocol
MAODV is an extention of AODV with multicast capability.
* Multicast, Unicast and broadcast features have been streamelined into MAODV.
*MAODV uses sequence numbers to ensure that the most recent route to the multicast group is used.
*MAODV uses the
*MAODV is an extention of AODV with multicast capability.
* Multicast, Unicast and broadcast features have been streamelined into MAODV.
*MAODV uses sequence numbers to ensure that the most recent route to the multicast group is used.
*MAODV uses the notion of a group leader which updates the sequence numbers of group periodically and broadcasts it using Group Hellos(GRPHs).
* Group leader is typically the first node join the group.