Optimal Cooperation Strategy in Cognitive Relay Networks with Energy Harvesting

Abstract

In this paper, we consider cognitive relay networks with energy harvesting and cooperative communications, the secondary user (SU) can get energy and idle spectrum by helping primary user (PU) to transmit its information for each slot. In such a scenario, we propose an optimal cooperation strategy in order to maximize the overall networks’ throughput. We compare the results of the optimal cooperation strategy with the other collaboration strategy. The results show that the optimal cooperation strategy is always superior to the other collaboration strategy.