■ In the scalable ad hoc recursive multicast protocol, it can be observed that the
scalability feature is satisfied. The scalability can be observed from the tinny
increase in the packet header size with the group size. Also small values of the
packet delivery ration and the end to end delay with group size in comparison
with the other protocols in the same area of study. It can be conclude that end to
end delay of SARM compared to E2M and DDM is about 5% when group size
changes and 6% when pause time changed. We can conclude that SARM is a
efficient scalable multicast protocol for ad hoc networks.
■ The scalable ad hoc recursive multicast protocol is also reliable with the node
movement. It can be observed that the packet delivery ratio is high even when
the value of node movement speed is high. Also the end to end delay had good
values with the node movement.
6.3 Future Work
This thesis finds a solution to a challenging problem of scalable multicast in wired and ad
hoc networks. However, there are still some open research points that can be investigated
further to extend the presented approach done in this thesis. This section gives some
suggestions for future work as follows:
■ In scalable recursive multicast protocol, points like quality of service (i.e.,
bandwidth, delay, and jitter) and security need further investigations as a future
work.
■ Implementing cache in branching node routers (BNRs) is an interest point of
research. At this point the contents and the size of cache should be widely
investigated and studied. Also this point will add the reliability feature to the
protocol.
■ In mobile scalable recursive multicast protocol, a detailed and extensive
evaluation can be done to improve the efficiency of this protocol.
■ In scalable ad hoc recursive multicast protocol, the broadcast process in link
recovery when a link breakage happened can be reduced by applying a kind of
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