  In ad hoc networks, the scheduling of route-request packets should be
different from that of message packets, because during transmission of message
packets the location of the destination is known whereas in route discovery
this is not known in most of the cases. The router has to depend upon the last
known location, if any, of the destination to determine the center and radius
of the circle that embeds all possible current position of the destination.
Route-request packets generated from the source are directed towards this
circle i.e., directional route discovery can be applied. Otherwise, when no
earlier location of the destination is known the route-requested has to be
broadcast in the whole network consuming a significant amount of time than
directional route discovery. The present article proposes fuzzy controlled
scheduling of route-request packets in particular that greatly reduces the
average delay in route discovery in ad hoc networks.
