FLCOR

Abstract

Acoustic signal propagation over underwater acoustic sensor networks (UW-ASNs) is characterized by limited energy constraint sensor devices. The batteries of the sensor nodes which are deployed for UW-ASNs is difficult to replace or recharge while they are running out of energy. Consequently, an energy efficient routing protocol is essentially needed for UW-ASNs which can enhance the whole network lifetime. The opportunistic routing provides an emerging solution for UW-ASNs to improve the transmission reliability and the network throughput by the aid of neighboring nodes cooperation to relay the packet towards the surface sink. In this paper, a fuzzy logic-based cooperative opportunistic routing (FLCOR) protocol is proposed for UW-ASNs in which the source node firstly determine a forwarding relay set based on the depth information and then, we will apply a fuzzy logic-based relay selection (FLRS) scheme to select the best relay node from the forwarding relay set for each-hop transmission. In FLCOR protocol, the energy consumption ratio (ECR) and the packet delivery probability (PDP) of each neighbor node are used to select the best relay from the forwarding relay set. Consequently, the proposed scheme can provide maximum node advancement towards the surface sink and enhance the network stability. Our extensive simulation results reveal that the proposed FLCOR protocol outperforms the depth based routing (DBR) protocol in terms of network stability.