An Adaptive Energy Saving and Reliable Routing Protocol for Limited Power Sensor Networks

In wireless sensor networks, the value of transmission range has a direct impact on energy utilization. A sensor node makes use of the maximum transmission power and transmission range to send packets in a network which results in wastage of energy, since maximum transmission range is mostly longer than the distance between node and its extreme neighbor due to node distribution. In this paper, we present an adaptive energy saving and reliable routing protocol (AESRR) for wireless sensor networks. In AESRR, sensor node reduces its maximum transmission range in order to reach the extreme neighbor for saving energy before sending the first packet. The route discovery process of AESRR is on-demand. In the route discovery process, a combined link weight is determined based on the parameters transmission success ratio and node's residual energy. The best route is selected based on this link weight value. The sensor node must readjust the transmission range when remaining energy reaches bellow a threshold link weight value. Our proposed protocol saves energy, and prolongs the lifetime of node while enhancing the reliability. By simulation results, we demonstrate that AESRR has better delivery ratio and less energy consumption and delay.