Covert communication can hide the legitimate transmission from unauthorized eavesdropping. Benefiting deployment flexibility, unmanned aerial vehicles (UAVs) be utilized to enhance confidentiality. In this correspondence, we consider a covert network with aid of full-duplex UAV relay, which is employed help and confuse warden. The warden adopts radiometer detect transmission. We first find opti...

Ubiquitous sensor-rich smartphones have promoted MCS, an emerging people-centric sensing paradigm for urban IoT. However, using cellular networks to transmit the big data collected by MCS would incur expensive financial costs both participating phone users and organizer. A promising solution this is integrate low-cost D2D communication into design. in will require cooperative interactions among...