A Modified Approach to Dynamic Source Routing
in Mobile Ad-Hoc Networks
Gautam Chakrabarti and Sandeep S. Kulkarni
To ensure uninterrupted communication in a mobile ad-hoc network, efficient
route discovery is crucial when nodes move and/or fail.
Hence, protocols such as Dynamic Source Routing (DSR)
precompute alternate routes before a node moves and/or fails.
In this paper, we modify the way these alternate routes are maintained
and used in DSR, and show that these modifications permit more efficient
route discovery when nodes move and/or fail. Our routing protocol also
does load balancing among the number of alternate routes that are
Our simulation results show that maintenance of these alternate routes
(without affecting the route cache size at each router) increases the packet
We also show that our approach enables us to provide QoS guarantees by
ensuring that appropriate bandwidth will be available for a flow even
when nodes move.
Towards this end, we show how reservations can be made on the alternate
routes while maximizing the bandwidth usage in situations where nodes
do not move.
We also show how the load of the traffic generated due to node movement is shared among several alternate routes.
In addition, we adaptively use Forward Error Correction
techniques with our protocol and show how it can improve the packet
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