Performance analysis of routing protocol based on sojourn time in MANET

A Mobile Ad hoc Network (MANET) is an infrastructure-less network of wireless mobile nodes that can communicate with one another directly or via intermediate nodes. Connectivity breaks between nodes, resulting from random fashioned nodes movement, are a serious problem for MANET routing protocols. Though, sometimes the selected routes which are based on hop count are having weak quality links, implies low SNR, which results higher rate of frame error, higher end to end delay and lower throughput. This present mechanism permits the network layer to modify its routing protocol dependent on Received Power and SNR along the source to destination route for every transmission link. This proposed routing method uses signal-to-noise ratio (SNR) of a link for getting value of its sojourn time and allot a link cost value on the basis of calculated sojourn time. Sojourn time is assumed to follow a Rayleigh distribution. Link cost is inversely proportional to sojourn time. Node which is connected to its previous node with less link cost is chosen as next neighbor node on the way of source to destination route establishment. The performance analysis was evaluating our approach (Sojourn Time-ST-AODV) and AODV, to illustrate that our proposed methodology improved the performance of AODV. Finally, justify network performance on NS-2 network simulator platform depending on the basic network parameters such as delay and throughput in respect of nodes and different transmission rates of mobile nodes.