Power Allocation based Hybrid Multihop Relaying Protocol for Sensor Networks

In this paper, Hybrid relay systems are comprised of Amplify-andForward (AF), Decode-and-Forward (DF) and DeModulate-and-Forward (DMF) together in cooperative networks. We propose adaptive relay schemes based on Channel State Information (CSI) of the received Signal-to-Noise Ratio (SNR) at the Relay Node (RN). We select the relay protocol adaptively, on the basis of Power Allocation (PA) constraint, or the SNR value at previous hop. We improve multihop performance of the relay system, by using PA allocation. As the power in terms of sensors is very crucial, we focus as it is an important aspect. The simulation results show that the performance of the novel hybrid sensor relay protocol improves the conventional hybrid system.