反向散射辅助的无线供能通信网络中用户能效公平性研究

doi:10.11959/j.issn.1000-436x.2020133

Abstract

Abstract:

In order to address the unfair user-centric energy efficiency (EE) problem caused by channel difference in the backscatter-assisted wireless powered communication network,a resource allocation scheme was proposed.Firstly,a mixed integer nonconvex fractional programming problem was formulated to maximize the minimum user-centric EE,subject to the quality of service and energy-causality constraints.Based on the generalized fractional programming theory,the original problem was transformed into a mixed integer nonconvex subtraction problem.With the aid of the slack variable,the proof by contradiction,the auxiliary variable and the mixed integer nonconvex subtraction problem were further transformed into an equivalent convex problem.Finally,an iterative algorithm was proposed to obtain the optimal solutions.Computer simulations validated the quick convergence of the proposed iterative algorithm,and that the developed resource allocation scheme efficiently guarantees the fairness among users in terms of EE.

Key words: backscatter, wireless powered communication network, user-centric energy efficiency, fairness

CLC Number:

TN92

Yinghui YE,Liqin SHI,Guangyue LU. User-centric energy efficiency fairness in backscatter-assisted wireless powered communication network[J]. Journal on Communications, 2020, 41(7): 84-94.

Figures/Tables 6

References 24

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参数名称	取值
用户数K	3
专用能量站最大发射功率/W	3
整个传输时隙T/s	1
带宽/kHz	10
噪声功率/dBm	-80
用户k最小速率约束/（kbit·s^-1）	10
反向散射通信模式时的电路损耗/μW	500
用户k最大发射功率/mW	10
HTT模式发送信息的电路损耗/mW	1
反射系数	Γ₀=1，Γ₁=-1
反向散射通信模块的散射效率ε/dB	-1.1

User-centric energy efficiency fairness in backscatter-assisted wireless powered communication network

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