A Mobile Ad-Hoc Network (MANET) is a temporary, infrastructure-less and distributed network having mobile nodes. The MANET has limited resources like bandwidth and energy. Due to limited battery power, nodes die out early which leads to lesser network lifetime. To make network last for a longer period the routing protocol used must be energy efficient. In this paper, location aided routing (LAR), an on-demand routing protocol is modified to make it energy efficient. The proposed protocol, variable transmission range power aware location aided routing (VTRPALAR), controls the transmission power of a node according to the required transmission range which depends on the minimum number of neighboring nodes required to maintain the connectivity of the MANET. Further, it also includes energy information on route request packet and selects the energy efficient path to route data packets. The novelty of the proposed work is that it achieves routing in the direction towards the destination using the nodes with sufficient residual energy. This leads to increase in the network lifetime. The performance of the proposed protocol is compared with location aided routing (LAR) and fuzzy thresholded power aware location aided routing (FTPALAR) protocols.

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Manet Location Aided Routing Transmission Power Fuzzy Threshold Energy.