BEMRP

AcronymDefinition
BEMRPBitterroot Ecosystem Management Research Project (US Forest Service)
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Impact of Multicast Group Size: For smaller multicast groups (of size 2), the hop count per source-receiver path for BEMRP can be 6-9%, 9-12% and 10-12% more than that of the other three multicast routing protocols in networks of low, moderate and high density respectively.
For larger multicast groups, BEMRP tends to perform better by virtue of its tendency to strictly minimize only the number of links in the tree.
For a given multicast group size and low node mobility, the time between successive tree discoveries in networks of moderate density (50 nodes) for MAODV and NR-MLPBR is 67-90% and for R-MLPBR and BEMRP is 73-96% of those incurred in low-density networks.
For a given multicast group size and low node mobility, the time between successive tree discoveries in networks of high density (75 nodes) is 51-80% for MAODV and NR-MLPBR and for R-MLPBR and BEMRP is 70-90% of those obtained in networks of low-density.
In low-density networks, the time between successive route discoveries for R-MLPBR and NR-MLPBR is about 10-15% more than that obtained for BEMRP for smaller multicast groups and is almost the same as that of BEMRP for moderately sized multicast groups.
For smaller group sizes, the time between successive broadcast tree discoveries for MAODV and BEMRP is respectively about 80%-90% and 85%-94% of that incurred for NR-MLPBR and R-MLPBR.
Impact of Network Density: As we increase the network density from 25 nodes to 50 nodes, we observe that the time between successive broadcast tree discoveries for MAODV, NR-MLPBR, R-MLPBR and BEMRP decreases by 13%, 9%, 6% and 6% respectively.
BEMRP incurs the least energy consumption per node and MAODV incurs the largest energy consumption per node.
BEMRP and MAODV incur the largest increase in energy consumed per node with increase in node mobility.
As a result, for multicast group sizes of 8, 12 and 24, as we increase the network density from 25 nodes to 50 nodes, the increase in the energy consumed per node for MAODV, NR-MLPBR, R-MLPBR and BEMRP is by factors of 47%-134%, 46%-133%, 42%-122% and 30%-96% respectively.
In the case of BEMRP and R-MLPBR, as we increase the multicast group size from 2 to 24, the energy consumed per node increases by a factor of 2.
Similar to that observed for flooding, BEMRP and MAODV incur the largest increase in energy consumed per node with increase in node mobility.