Distributed Fuzzy Logic-Based Relay Selection Algorithm for Cooperative Wireless Sensor Networks

Distributed Fuzzy Logic-Based Relay Selection Algorithm for Cooperative Wireless Sensor Networks

Relay selection is a technique that can considerably increase the performance of cooperative communications. In this paper, we propose a new relay selection algorithm using fuzzy logic aiming at both network lifetime and end-to-end throughput. The new algorithm operates in a distributed way, running independently at each node, not requiring a central entity for complex coordination. The method considers the channel state of the relay-destination link and the residual energy of its battery. It is shown that the proposed scheme can transmit a larger amount of information during the network lifetime with respect to both the opportunistic (which focuses on throughput) and random (which focuses on lifetime) selection algorithms, increasing the network utility.

""