Secure D2D Communication in Large-Scale Cognitive Cellular Networks: A Wireless Power Transfer Model

摘要: In this paper, we investigate secure device-to-device (D2D) communication in energy harvesting large-scale cognitive cellular networks. The constrained D2D transmitter harvests from multiantenna equipped power beacons (PBs), and communicates with the corresponding receiver using spectrum of primary base stations (BSs). We introduce a transfer model an information signal to enable wireless transmission. model, three (WPT) policies are proposed: 1) co-operative (CPB) power transfer, 2) best beacon (BPB) power 3) nearest (NPB) power transfer. To characterize reliability proposed policies, derive new expressions for exact outage probability. Moreover, analysis probability is extended case when PBs large antenna arrays. present comparative framework two selection schemes: 1) best (BRS), where strongest channel selected; 2) nearest (NRS), nearest selected. assess secrecy performance, analytical throughput considering schemes WPT policies. presented Monte carlo simulation results corroborate our show: 1) secrecy performance improves increasing densities receivers due larger multiuser diversity gain; 2) CPB achieves better than BPB NPB but consumes more power; 3) BRS NRS demands instantaneous feedback overhead. A pivotal conclusion reached that number antennas at PBs, offers comparable lower complexity.