Energy-Efficient Cooperation in Cognitive Wireless Powered Networks
In this letter, we consider a cooperative sharing model for cognitive wireless powered communication networks (CWPCNs), which leverages the notion of cooperation between primary and secondary systems in cognitive radio networks to accomplish primary transmission early and vacate opportunity for secondary transmission. With the proposed spectrum sharing model, we investigate the optimal design for such a cooperative CWPCN with both amplify-and-forward (AF) and decode-and-forward (DF) protocols to maximize its uplink energy efficiency. The energy efficiency optimization problem is decomposed into two subproblems for uplink scheduling and cooperative power control. We also propose a suboptimal solution to tackle the unavailable information on channel condition between the primary transmitter and secondary users. The numerical results show that the DF protocol outperforms the AF protocol in general and the suboptimal solution is slightly outperformed by the optimal one.
원문복사신청을 하시면, 일부 해외 인쇄학술지의 경우 외국학술지지원센터(FRIC)에서
무료 원문복사 서비스를 제공합니다.
NDSL에서는 해당 원문을 복사서비스하고 있습니다. 위의 원문복사신청 또는 장바구니 담기를 통하여 원문복사서비스 이용이 가능합니다.
- 이 논문과 함께 출판된 논문 + 더보기