计算机应用 ›› 2021, Vol. 41 ›› Issue (6): 1539-1545.DOI: 10.11772/j.issn.1001-9081.2020121930

所属专题: 2020年全国开放式分布与并行计算学术年会(DPCS 2020)

• 2020年全国开放式分布与并行计算学术年会(DPCS 2020) •    下一篇

基于缓存辅助的全双工无线携能通信系统的中继选择策略

施安妮1, 李陶深1,2, 王哲3, 何璐1   

  1. 1. 广西大学 计算机与电子信息学院, 南宁 530004;
    2. 南宁学院 信息工程学院, 南宁 530200;
    3. 广西民族大学 人工智能学院, 南宁 530006
  • 收稿日期:2020-11-04 修回日期:2021-03-31 出版日期:2021-06-10 发布日期:2021-06-21
  • 通讯作者: 李陶深
  • 作者简介:施安妮(1996-),女,福建三明人,硕士研究生,CCF会员,主要研究方向:无线携能通信、能量收集;李陶深(1957-),男,广西南宁人,教授,博士,CCF杰出会员,主要研究方向:无线网络、分布式数据库、云计算、大数据、网络与信息安全;王哲(1991-),男,河南南阳人,博士,CCF会员,主要研究方向:能量收集网络、电力装备、智能信息;何璐(1991-),男,江西赣州人,硕士研究生,CCF会员,主要研究方向:无线携能通信、能量收集。
  • 基金资助:
    国家自然科学基金资助项目(61762010)。

Relay selection strategy for cache-aided full-duplex simultaneous wireless information and power transfer system

SHI Anni1, LI Taoshen1,2, WANG Zhe3, HE Lu1   

  1. 1. School of Computer, Electronics and Information, Guangxi University, Nanning Guangxi 530004, China;
    2. College of Information Engineering, Nanning University, Nanning Guangxi 530200, China;
    3. Institute of Artificial Intelligence, Guangxi University for Nationalities, Nanning Guangxi 530006, China
  • Received:2020-11-04 Revised:2021-03-31 Online:2021-06-10 Published:2021-06-21
  • Supported by:
    This work is partially supported by the National Natural Science Foundation of China (61762020).

摘要: 为了提高无线携能通信(SWIPT)系统的性能,构建了一个全新的基于缓存辅助的全双工中继协作系统模型,并在系统中考虑了空闲能量接入点(EAP)作为中继节点的额外能量补充。对于系统吞吐量最优化问题,提出一种基于功率分配协作的SWIPT中继选择策略。首先,基于通信服务质量与源节点发射功率等约束建立问题模型;其次,通过数学变换将原非线性混合整数规划问题转换为一对耦合优化问题;最后,利用KKT条件并借助拉格朗日函数解决内部优化问题,得到了功率分配因子和中继发射功率的闭式解,并在此结果上解决外部优化问题,选择最佳中继进行协作通信。仿真实验结果表明,空闲EAP和中继处高速缓冲存储器的配置具有可行性和有效性,并且,所提系统在吞吐量增益方面明显优于传统的中继协作通信系统。

关键词: 无线携能通信, 中继选择, 全双工, 无线缓存, 自能量回收, 功率分配协议

Abstract: In order to improve the performance of the Simultaneous Wireless Information and Power Transfer (SWIPT) system, a new cache-aided full-duplex relay collaborative system model was constructed, and the free Energy Access Points (EAPs) were considered as the extra energy supplement of relay nodes in the system. For the system throughput optimization problem, a new SWIPT relay selection strategy based on power allocation cooperation was proposed. Firstly, a problem model on the basis of the constraints such as communication service quality and source node transmit power was established. Secondly, the original nonlinear mixed integer programming problem was transformed into a pair of coupling optimization problems through mathematical transformation. Finally, the Karush-Kuhn-Tucker (KKT) condition was used to solve the internal optimization problem with the help of Lagrange function, so that the closed-form solution of the power allocation factor and the relay transmit power was obtained, and the external optimization problem was solved based on this result, so as to select the best relay for the cooperative communication. The simulation experimental results show that, the free EAPs and the configuration of cache for the relay are feasible and effective, and the proposed system is significantly better than the traditional relay cooperative communication systems in terms of throughput gain.

Key words: Simultaneous Wireless Information and Power Transfer (SWITP), relay selection, full-duplex, wireless caching, self-energy recycling, power allocation protocol

中图分类号: