Relaying Protocol for Scattered Sensor Networks with Energy Harvesting Relay Nodes
Keywords:Energy Harvesting, Wireless Sensor Networks, Adaptive Time-Switching (ATS), Adaptive Time Switching Adaptive Power Splitting (ATS-APS).
In the usual energy-harvesting (EH) relaying protocols based on time switching (TS) and power splitting (PS), the system performance depends TS and PS ratios. These parameters need to be optimized to achieve the optimum performance. In the scattered cooperative networks, where relay operates independently, the optimization of PS and TS ratios becomes challenging. In this paper, two relaying protocols referred to as adaptive time-switching (ATS) and adaptive time-switching adaptive power-splitting (ATS-APS) protocols is proposed to overcome this challenge. In the proposed protocols, the relay can dynamically optimize their respective TS and PS ratios according to their local channel condition among relays, i.e., without any external help from the source or destination, that makes the proposed protocols promising for the scattered relaying network. With the help of numerical analysis, the proposed protocols can outperform the usual approach.