In order to satisfy timeliness requirements arising from environmental sensing applications, Age of Information (AoI) was proposed characterize the freshness received updates. this article, we consider a wireless powered relay aided communication network (WPRCN), in which wirelessly by hybrid-access point (H-AP) receives monitoring information update sensor and forwards it H-AP. The long-term a...

In this paper, we study a diamond-relay channel where the source is connected to M relays through orthogonal links and the relays transmit to the destination over a wireless multiple-access channel in the presence of an eavesdropper. The eavesdropper not only observes the relay transmissions through another multiple-access channel, but also observes a certain number of source-relay links. The l...