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* Dynamic source routing
[DSR]: DSR is a source initiated or on demand routing
protocol in which source finds
unexpired route to the destination to send the packet. It is used in the
network where mobile nodes move with moderate speed.
* Overhead is significantly
reduced, since nodes do not exchange routing table information it has 2 phases.
1. Route discovery
2. Route maintenance
The source which wants to send
the information to the destination will create a route request
message by adding its own
identification number and broadcasts them in the network. The intermediate
nodes will continue the broadcast but adding their own identification number.
When the destination is reached a
route reply message is generated which will be sent back to the source.
The source can receive multiple route replies indicating the presence of multiple
paths.
The source will pick up one of
the path and will use for transmission. If there is a link failure one of the
node will detect and will create a route error message which will be
sent back to the source in this case the path has to be re-established for
further transmission.
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