Relay Selection Scheme for Hierarchical Wireless Sensor Networks

This paper proposes a new relay selection scheme for wireless cooperative networks that effectively distributes the traffic of packets from the source nodes to the sink. By estimating the channel information of the two-hop neighbors, the source node can choose the most optimal relay node to forward its messages on the basis of the transmission rate of the channels from the source to the relay and from the relay to the destination. The simulation results indicate that our scheme is efficient in increasing the packet delivery ratio, decreasing the average energy consumption, and decreasing the end-to-end delay.