QoS Guarantee for Energy Harvesting Cognitive Radio Networks : (Invited Paper)

摘要

Energy harvesting cognitive radio networks (EHCRNs), which combine the energy harvesting and cognitive radio technologies, are expected to be an effective solution to solve the problem of spectrum scarcity as well as respond the call for green communications. However, how to guarantee the quality of service (QoS) for EHCRNs is still an unsolved problem. In this paper, we discuss the impacts of the average energy arrival rate (AER) and the peak power of amplifier (PPA) on transmit power in EHCRNs. Then, based on QoS requirements, we propose the optimal power allocation scheme for EHCRNs under AER and PPA constraints, respectively. Simulation results show that our developed power allocation scheme can achieve the maximum effective capacity for diverse QoS requirements.