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Sensors 2017, 17(6), 1258; doi:10.3390/s17061258

Optimal Time Allocation in Backscatter Assisted Wireless Powered Communication Networks

Key Laboratory of Ministry of Education in Broadband Wireless Communication and Sensor Network Technology, Nanjing University of Posts and Telecommunications, Nanjing 210003, China
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Academic Editors: Mianxiong Dong and Anfeng Liu
Received: 17 April 2017 / Revised: 17 May 2017 / Accepted: 22 May 2017 / Published: 1 June 2017
(This article belongs to the Special Issue New Paradigms in Data Sensing and Processing for Edge Computing)
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Abstract

This paper proposes a wireless powered communication network (WPCN) assisted by backscatter communication (BackCom). This model consists of a power station, an information receiver and multiple users that can work in either BackCom mode or harvest-then-transmit (HTT) mode. The time block is mainly divided into two parts corresponding to the data backscattering and transmission periods, respectively. The users first backscatter data to the information receiver in time division multiple access (TDMA) during the data backscattering period. When one user works in the BackCom mode, the other users harvest energy from the power station. During the data transmission period, two schemes, i.e., non-orthogonal multiple access (NOMA) and TDMA, are considered. To maximize the system throughput, the optimal time allocation policies are obtained. Simulation results demonstrate the superiority of the proposed model. View Full-Text
Keywords: wireless powered communication network; backscatter communication; harvest-then-transmit mode; optimal time allocation policy wireless powered communication network; backscatter communication; harvest-then-transmit mode; optimal time allocation policy
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Lyu, B.; Yang, Z.; Gui, G.; Sari, H. Optimal Time Allocation in Backscatter Assisted Wireless Powered Communication Networks. Sensors 2017, 17, 1258.

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