Modified Route Request Broadcasting for Improving Multipath Routing Scheme Performance in MANET

Mobile Ad Hoc Network (MANET) is growing in popularity with the advent of 5G wireless network and Internet of Things. In this type of peer to peer network, nodes are self-configurable and communicate among themselves wirelessly. Typically, these nodes are powered by batteries and move continuously within the specified region. In order to provide efficient communication between these devices, several routing protocols have been designed. However, most of the schemes focus on construction ofshortestroute. With this approach, it is not always possible to provide reliable and efficient path in highly dynamic environment to carry out data transmission process. In this paper, a novel Adaptive and Stable Multipath Routing Scheme (ASTMRS) has been proposed in which only peer nodes with good fitness values are allowed to process route request packet. This fitness value is estimated based on node mobility, residual energy and distance metrics. Further, each node updates its next hop information on the basis of node degree and received signal power. Simulation has been conducted under various network scenarios such as packet rate and pause time. Under different scenarios, an average improvement of 15.82% and 14.38% has been seen in packet delivery ratio(PDR) and throughput respectively; other performance metrics such as normalized routing load (NRL) and delay have been reduced to 15.58% and 13.95% respectively against AOMDV. Similarly, as compared to AODV, the scheme shows 15.96% and 15.78% improvement in terms of PDR and throughput respectively. Moreover, NRL and delay are reduced by33.04% and 38.92% respectively against AODV.