Abstract:
A Mobile Ad-Hoc Network (MANET) is a
collection of wireless mobile nodes forming a
temporary network without the aid of any established
infrastructure or centralized administration. The
emergence of real-time applications and the
widespread use of wireless and mobile device have
generated the need to provide the QoS support in
wireless and mobile networking environment. To
provide the QoS support in MANET, QoS routing
plays an important role. In this paper, an efficient
QoS routing scheme is proposed to find the most
relevant path for a particular traffic. The traffic is
classified into video, audio and message. The
different parameter sets are used for a particular
traffic class. The selective parameters for route
discovery is hop count, end-to-end delay and
bandwidth. Hop count and end-to-end delay are used
for optimization purpose and bandwidth is used for
constraint. All qualified paths excluding the primary
path are maintained after the route discovery. To
provide fault tolerance and to keep the continuity of
data packet delivery, this proposed mechanism also
uses the backup route when the current active route
breaks. Our scheme is applied to the Ad-hoc On
Demand Distance Vector (AODV) protocol. This
work is intended to provide the required QoS satisfied
routes for each type of traffic class and to reduce the
unnecessary computation complexity. Network
Simulator tool NS-2 (ver 2.34) is used to simulate the
proposed QoS routing mechanism. The performance
of our solution is compared with original AODV in
terms of Packet Delivery Ratio (PDR) and routing
overhead (RO) to show the effectiveness of the proposed mechanism.
