Energy-efficient transmission for wireless powered multiuser communication networks

Wu Q, Tao M, Ng DWK, Chen W, Schober R (2015)

Publication Type: Conference contribution

Publication year: 2015

Journal

2012 IEEE International Conference on Communications (ICC) Institute of Electrical and Electronics Engineers (IEEE)

Publisher: Institute of Electrical and Electronics Engineers Inc.

Book Volume: 2015-September

Pages Range: 154-159

Conference Proceedings Title: IEEE International Conference on Communications

Event location: London GB

ISBN: 9781467364324

DOI: 10.1109/ICC.2015.7248314

Abstract

This paper considers wireless powered communication networks (WPCN). Our goal is to investigate the maximum network energy efficiency (EE) by joint time allocation and power control while taking account the initial battery energy level of each user. It is shown that the EE maximization problem for the WPCN can be cast into the EE maximization problems for two independent networks, i.e., purely wireless powered communication networks (PWPCN) or initial energy limited communication networks (IELCN). For the PWPCN, we find that: 1) in the wireless energy transfer (WET) stage, the power station always transmits with its maximum power; 2) it is not necessary for all users to transmit signals in the wireless information transmission (WIT) stage, but all scheduled users will deplete all of their energy; 3) the maximum system EE can always be achieved by exhausting all the available time. Based on these observations, we derive a closed-form expression for the system EE based on the user EE, which transforms the original problem into a user scheduling problem that can be solved efficiently. While for the IELCN, we reveal that the most energy-efficient transmission strategy is to only schedule the user who has the highest user EE. Simulation results validate our theoretical findings and demonstrate the effectiveness of the proposed scheme.

Authors with CRIS profile

Robert Schober Lehrstuhl für Digitale Übertragung

Involved external institutions

Shanghai Jiao Tong University / 上海交通大学 CN China (CN) University of New South Wales (UNSW) AU Australia (AU)

How to cite

APA:

Wu, Q., Tao, M., Ng, D.W.K., Chen, W., & Schober, R. (2015). Energy-efficient transmission for wireless powered multiuser communication networks. In IEEE International Conference on Communications (pp. 154-159). London, GB: Institute of Electrical and Electronics Engineers Inc..

MLA:

Wu, Qingqing, et al. "Energy-efficient transmission for wireless powered multiuser communication networks." Proceedings of the IEEE International Conference on Communications, ICC 2015, London Institute of Electrical and Electronics Engineers Inc., 2015. 154-159.

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