电子学报 ›› 2020, Vol. 48 ›› Issue (4): 697-705.DOI: 10.3969/j.issn.0372-2112.2020.04.011

• 学术论文 • 上一篇    下一篇

无线供电混合多址接入网络的最优能效资源分配研究

张广驰1, 曾志超1, 崔苗1, 武庆庆2, 林凡3, 刘怡俊1   

  1. 1. 广东工业大学信息工程学院, 广东广州 510006;
    2. 新加坡国立大学电子与计算机工程系, 新加坡 609774;
    3. 广州杰赛科技股份有限公司, 广东广州 510310
  • 收稿日期:2018-05-09 修回日期:2019-10-23 出版日期:2020-04-25 发布日期:2020-04-25
  • 通讯作者: 崔苗
  • 作者简介:张广驰 男,1982年2月出生于广西南宁.教授,研究方向为新一代无线通信技术.E-mail:gczhang@gdut.edu.cn;曾志超 男,1992年1月出生于广东梅县.硕士研究生,研究方向为非正交多址接入的资源分配策略.E-mail:zeng_zhichao@163.com;武庆庆 男,1991年10月出生于安徽阜阳.研究员,研究方向为新一代无线通信技术.;林凡 男,1983年2月出生于浙江温州.高级工程师,研究方向为智慧城市、智能化网络、物联网等.;刘怡俊 男,1977年5月出生于江西于都.教授,研究方向为集成电路设计、类脑计算机、计算机体系结构等.
  • 基金资助:
    国家自然科学基金(No.61571138);广东省科技计划(No.2017B090909006,No.2018A050506015,No.2019B010119001);广州市科技计划(No.201904010371)

Optimal Energy Efficient Resource Allocation for Wireless Powered Hybrid Multiple Access Networks

ZHANG Guang-chi1, ZENG Zhi-chao1, CUI Miao1, WU Qing-qing2, LIN Fan3, LIU Yi-jun1   

  1. 1. School of Information Engineering, Guangdong University of Technology, Guangzhou, Guangdong 510006, China;
    2. Department of Electrical and Computer Engineering, National University of Singapore, 609774, Singapore;
    3. Guangzhou GCI Science & Technology Co., Ltd., Guangzhou, Guangdong 510310, China
  • Received:2018-05-09 Revised:2019-10-23 Online:2020-04-25 Published:2020-04-25

摘要: 在能量受限的通信系统中,能量效率是衡量系统性能的关键指标.本文研究由一个基站和多个分簇用户组成的无线供电混合非正交多址接入系统.在该网络中,基站通过无线能量传输方式给用户供能,用户则利用收集到的能量向基站传输各自的信息.为降低基站的接收解码复杂度,用户采用分簇的方式进行信息传输:簇间用户的信息传输采用时分多址方式,而簇内用户的信息传输采用非正交多址方式.通过联合分配能量传输与信息传输的时间长度以及控制基站和用户的发射功率来实现网络能量效率的最大化.由于涉及的优化问题是非凸的,本文先通过寻找问题最优解的结构,然后根据分式规划理论,提出了一种新的迭代资源分配算法来求解该问题.仿真结果表明,与"吞吐量最大化策略"和 "固定时间分配策略"两种基准策略相比,所提出的算法显著提高了网络的能量效率.

关键词: 非正交多址接入, 能量效率, 分式规划, 资源分配

Abstract: In energy-limited communication systems,energy efficiency is a key factor that affects the performance of the systems.In this paper,we consider a wireless powered hybrid non-orthogonal multiple access network consisting of a base station and multiple clustered users.In this network,the base station transfers energy to the users in a wireless manner,and the users utilize the harvested energy to transmit information to the base station.To simplify the complexity of the base station’s information receiver,a hybrid multiple access scheme is adopted by the users,which are partitioned into multiple clusters.The users in the same cluster transmit in the non-orthogonal multiple access manner,while the users from different clusters transmit in the time division multiple access manner.To maximize the energy efficiency of the network,we jointly optimize the time length of wireless energy transfer from the base station to the users and the time length of information transmission from the users to the base station,as well as the transmit powers of the users.The formulated problem is non-convex and thus is difficult to solve.To tackle this problem,we first find the structure of its optimal solution,and then propose an efficient iterative algorithm to solve it based on the fractional programming technique.Simulation results show that the energy efficiency performance of the proposed algorithm significantly outperforms that of two benchmark schemes,namely the throughput maximization scheme and the fixed time allocation scheme.

Key words: non-orthogonal multiple access, energy-efficiency, fractional programming, resource allocation

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