Indian Journal of Science and Technology

Abstract

An important challenge to enable real-time applications for MANETs is incorporating support for quality of service (QoS), such as delay and bandwidth constraints. To provide quality of service, extensions can be added to the AODV routing protocol while finding the route. These extensions specify the service requirements which must be met by nodes rebroadcasting a route request (RREQ) or returning a route reply (RREP) for a destination. In this paper, we propose an on demand delay and bandwidth based quality of service (QoS) routing protocol (AODV-D) to ensure that delay does not exceed a maximum value and the minimum available bandwidth is required to send the packets. Moreover, our proposed routing protocol will follow the concept of unicast-type two hop local route repair protocol to recover the lost links efficiently while increasing network reliability, increasing utilization, minimizing the number of control messages and shortening the repair delay. The protocol is implemented and simulated using Ns-2 simulator. The simulation studies were carried out for AODV_D , AODV,QS-AODV with different input parameters viz. number of Nodes, Node Mobility Speed; in the output parameters of packet delivery ratio, end-to-end delay and route life time was considered for all the above three protocols. The results have shown that the proposed algorithm AODV-D performed well when compared with AODV and QSAODV.
Keywords: Mobile Adhoc Networks(MANET), Two hop local route repair, Node traversal time, Minimum Available Bandwidth, QoS-aware routing