Abstract:
Mobile Ad-hoc Network (MANET) is a group of mobile nodes in which every node can communicate
with each other without any fixed infrastructure. Ad Hoc network has an irreplaceable role and a broad
application prospect in the field of battlefield communications. Currently in battlefield communications
the flight speed of advanced cruise missiles, air defense missiles, fighter jets, unmanned reconnaissance
aircraft, and other high-speed flight bodies can reach Mach 3-5 (about 1700m/s) which forms supersonic
speed flying ad hoc network. Traditional routing protocols will not suit supersonic speed flying ad hoc
network. For example, routing overhead incurred from route maintenance and route rediscovery when
min-hop routing protocol try to recover broken link which is selected based on hop count metric without
considering quality of link, make it unsuitable for supersonic speed flying ad hoc network. Specifically,
on-demand routing is widely developed in highly dynamic mobile wireless ad hoc networks because of its
effectiveness and efficiency. Most proposed on-demand routing protocols (such as in AODV and DSR)
however, build and rely on single route for each data session and route rediscovery process when active
path fail in single path routing will lead to extra overhead and latency and make under this highly
dynamic network and make it unsuitable. On the other hand, LET based routing protocol and shortest path
routing protocols repeatedly use a node and bandwidth around the best path respective of their metric
which will create congested node and overloaded bandwidth around the path and leads to congestion and
overwhelm the overall network performance. In addition to this, LET based routing protocol incurs
additional end to end delay which make it unsuitable to support for QoS. Lastly, under bandwidth
constrained wireless networks congestion commonly occurred which leads to longer end to end delay,
packet loss and reduced network performance. Towards this, we have improved the routing protocol
based on AOMDV by utilizing the idea of active communication time of link and load balancing strategy
that splits the load among node disjoint multiple paths in round robin fashion to avoid congestion and to
use network resources efficiently and make it support for QoS. Simulation results of the improved
AOMDV using ns-2 shows its suitability for supersonic speed flying ad hoc network and the performance
improvements in terms of the end to end delay, packet delivery ratio, and packet drop ratio in comparison
with original routing protocol (AOMDV)
