Simultaneous Wireless Information and Power Transfer for Multi-hop Energy-Constrained Wireless Network

Abstract

As a new wireless communication technology, simultaneous wireless information and power transfer (SWIPT) can perform the information decoding at the same time energy harvesting. It can prolong the life time of the energy-constrained wireless node. Current works of SWIPT mainly focus on one-hop and two-hop wireless networks. When SWIPT is applied in multi-hop energy-constrained wireless network (MECWN), each hop node needs to allocate the optimal information and power, and the different allocation of information and power affects the network topology and thus the route selection, which is challenge. This paper concurrently considers SWIPT and routing selection in MECWN to improve the performance. For forming a link in a path, we design a novel allocation model to allocate information and energy each hop. For choosing a next hop node and path, we propose a novel energy cost metric to choose the transmission mode and evaluate the energy consuming of SWIPT link. Based on the metric, we propose an energy-aware SWIPT routing algorithm which allocates the information and energy of link during path finding process. Our performance studies demonstrate that our proposed algorithms can efficiently support SWIPT in MECWN to significantly decrease the energy consuming.