With billions of mobile devices to be deployed in near term, extending the battery lives of these devices has emerged to a key challenge for designing mobile communication networks. Perhaps the most promising solutions are to harvest energy from the ambient environment or dedicated power sources, namely wireless power transfer (WPT). Recently, researchers have recognized that energy harvesting communications have brought many new research opportunities in communications, networking and signal processing and require revamping of communication theory. In particular, communication techniques, networking protocols and transceiver architectures need be redesigned to cope with energy intermittency, ensure high WPT efficiency and support simultaneous of information and power transfer. The goal of the workshop is to bring together the latest research results on these topics and also stimulate further research interest in the community in these exciting new directions. The scope of the proposed special issue will encompass communications, networking and signal processing aspects of energy harvesting and wireless power transfer in wireless communication networks.