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

通信学报 ›› 2020, Vol. 41 ›› Issue (7): 84-94.doi: 10.11959/j.issn.1000-436x.2020133

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

叶迎晖,施丽琴,卢光跃()

西安邮电大学陕西省信息通信网络及安全重点实验室，陕西西安 710121

修回日期:2020-05-27 出版日期:2020-07-25 发布日期:2020-08-01
作者简介:叶迎晖（1991- ），男，浙江丽水人，博士，西安邮电大学副教授，主要研究方向为携能通信和边缘计算|施丽琴（1993- ），女，安徽铜陵人，博士，西安邮电大学副教授，主要研究方向为边缘计算和无线供能网络|卢光跃（1971- ），男，河南南阳人，博士，西安邮电大学教授、博士生导师，主要研究方向为认知无线电、携能通信和边缘计算等
基金资助:
陕西省重点科技创新团队计划基金资助项目(2017KCT-30-02);国家自然科学基金资助项目(61901370)

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

Yinghui YE,Liqin SHI,Guangyue LU()

Shaanxi Key Laboratory of Information Communication Network and Security,Xi’an University of Posts ＆Telecommunications,Xi’an 710121,China

Revised:2020-05-27 Online:2020-07-25 Published:2020-08-01
Supported by:
The Science and Technology Innovation Team of Shaanxi Province(2017KCT-30-02);The National Natural Science Foundation of China(61901370)

摘要/Abstract

摘要：

针对反向散射辅助的无线供能通信网络中由于信道质量差异导致的用户能效不公平问题，提出了一种基于最大最小准则的资源分配方法。首先，考虑用户服务质量与能量因果约束，并以最大最小化用户能效为目标，将优化问题建模为混合整数非凸分式规划问题。其次，利用广义分式规划理论将其转化为一个混合整数非凸减式优化问题，并通过引入松弛变量、反证法和辅助变量将非凸减式问题进一步转化为一个等价的凸问题。最后，提出一种迭代算法来获取原优化问题的最优解。实验仿真验证了所提迭代算法的快速收敛性，并证明了所提资源分配方法能够有效地保障用户能效公平性。

关键词: 反向散射, 无线供能通信网络, 用户能效, 公平性

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

中图分类号:

TN92

叶迎晖,施丽琴,卢光跃. 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[J]. 通信学报, 2020, 41(7): 84-94.

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.

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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

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

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

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