A Hybrid Spectrum Sharing Protocol for Energy Harvesting Wireless Sensor Nodes

Abstract

In this paper, we propose a hybrid time switching and power splitting spectrum sharing protocol for energy harvesting wireless sensor nodes. Specifically, we use an approach of simultaneous energy harvesting and spectrum access to alleviate the major concerns of wireless sensor nodes such as limited power and spectrum. In the developed framework, an energy constrained sensor node adopts a time switching and power splitting based relaying protocol to harvest energy and spectrum from primary user. In exchange, it helps the primary user to achieve its target rate of performance. Apart from above, we also analyze the impact of time duration allocated for energy harvesting and information reception/transmission at sensor node on the Quality of Service (QoS) of primary user. Closed form expressions for outage probability have been derived and compared with simulation results to validate the proposed protocol.