An Energy-Efficient Controller for Wirelessly-Powered Communication Networks
Journal article, 2020

In a wirelessly-powered communication network (WPCN), an energy access point (E-AP) supplies the energy needs of the network nodes through radio frequency wave transmission, and the nodes store their received energy in their batteries for possible data transmission. In this paper, we propose an online control policy for energy transfer from the E-AP to the wireless nodes and for data transfer among the nodes. With our proposed control policy, all data queues of the nodes are stable, while the average energy consumption of the network is shown to be within a bounded gap of the minimum energy required for stabilizing the network. Our proposed policy is designed using a quadratic Lyapunov function to capture the limitations on the energy consumption of the nodes imposed by their battery levels. We show that under the proposed control policy, the backlog level in the data queues and the stored energy level in the batteries fluctuate in small intervals around some constant levels. Consequently, by imposing a negligible average data drop rate, the data buffer size and the battery capacity of the nodes can be significantly reduced.

Lyapunov stability

wireless energy transfer (WET)

networks

finite block-length analysis

cooperative communication

wireless powered communication networks (WPCNs)

batteries

routing

stability

Internet of things

stochastic optimization

Green communication

scheduling

queuing analysis

Author

Mohammad Movahednasab

Sharif University of Technology

Behrooz Makki

Chalmers, Electrical Engineering, Communication and Antenna Systems, Communication Systems

Naeimeh Omidvar

Iranian Research Institute for Fundamental Sciences

Mohammad Reza Pakravan

Sharif University of Technology

Tommy Svensson

Chalmers, Electrical Engineering, Communication and Antenna Systems, Communication Systems

Michele Zorzi

Sharif University of Technology

IEEE Transactions on Communications

00906778 (ISSN)

Vol. 68 8 4986-5002 9091929

Subject Categories

Telecommunications

Communication Systems

Energy Systems

DOI

10.1109/TCOMM.2020.2994228

More information

Latest update

9/30/2020