394 ◾ Mobile Ad Hoc Networks: Current Status and Future Trends
A fresh enough route is a valid route entry for the destination whose associated sequence number
is at least as great as that contained in the RREQ. e route is made available by unicasting an
RREP back to the origination of the RREQ. Each node receiving the request caches a route back
to the originator of the request, so that the RREP can be unicast from the destination along a path
to that originator or likewise from any intermediate node that is able to satisfy the request.
14.3.2.2.2 DSR
e dynamic source routing (DSR) [25] protocol is a simple and efficient routing protocol designed
specifically for use in multihop wireless ad hoc networks of mobile nodes. Using DSR, the net- ...