An QoS Aware Link Defined OLSR (LD-OLSR) Routing Protocol for MANETS

Mobile Adhoc Networks (MANETS) are gaining popularity because of interconnected networks. Routing is a key issue which needs to be addressed for efficient forwarding of packets from source to destination. Optimized Link State Routing (OLSR) is a proactive or table driven routing protocol in MANETS which works on the principal of link sensing. Multi Point Relay (MPR) node is mainly responsible for forwarding of topology control messages in OLSR. In this work MPR node is selected on the basis of node’s willingness to be selected as MPR. Wireless links are generally much inferior and prone to link losses. Frequent link failures result in lesser QoS parameters such as lesser throughput, higher end to end delay, higher latency and less utilization of link bandwidth. Link quality is an important metric to be taken as a research topic while deciding routing protocol. Routing protocols suggested by many authors have proffered minimum hop routing which contains lossy links in wireless medium resulting in reduction of throughput. In this work, Link Defined OLSR (OLSR-LD) is proposed which considers quality of link while making routing decision. Extensive Simulations were performed using NS-2 Simulator by varying pause time of nodes, simulation time of nodes and speed of nodes.