Multicasting in Ad-Hoc Networks: Comparing AODV and ODMRP

Thomas Kunz

Systems and Computer Engineering

MAODV

nMAODV: Multicast Ad Hoc On-Demand Distance Vector protocol

nFirst node to join a group becomes leader

nLeader periodically broadcasts group hello messages (including updated group sequence number)

nMulticast tree based on hard state, nodes joining or leaving require action to reconfigure the tree

nDownstream nodes who detect link failure will try to reconnect to tree

nIn case of network partition, two trees get established, after network partitions merge, multicast trees are merged again as well.

ØOne node will receive two group hello messages for some multicast group and will ask the leader with lower ID for permission to reconnect and will do so by joining multicast group