计算机科学 ›› 2022, Vol. 49 ›› Issue (6): 19-24.doi: 10.11896/jsjkx.220100064

• 6G 赋能智慧物联网技术与应用* 上一篇    下一篇


董丹丹1, 宋康1,2   

  1. 1 青岛大学电子信息学院 山东 青岛 266071
    2 西安邮电大学陕西省信息通信网络及安全重点实验室 西安 710121
  • 收稿日期:2022-01-07 修回日期:2022-03-10 出版日期:2022-06-15 发布日期:2022-06-08
  • 通讯作者: 宋康(sk@qdu.edu.cn)
  • 作者简介:(2020020613@qdu.edu.cn)
  • 基金资助:

Performance Analysis on Reconfigurable Intelligent Surface Aided Two-way Internet of Things Communication System

DONG Dan-dan1, SONG Kang1,2   

  1. 1 College of Electronic & Information Engineering,Qingdao University,Qingdao,Shandong 266071,China
    2 Shaanxi Key Laboratory of Information Communication Network and Security,Xi’an University of Posts & Telecommunications, Xi’an 710121,China
  • Received:2022-01-07 Revised:2022-03-10 Online:2022-06-15 Published:2022-06-08
  • About author:DONG Dan-dan,born in 1998,postgra-duate,is a member of China Computer Federation.Her main research interests include wireless communication and reconfigurable intelligent surface.
    SONG Kang,born in 1986,Ph.D,asso-ciate professor,master supervisor,is a member of China Computer Federation.His main research interests include cooperative transmission and intelligent signal processing.
  • Supported by:
    National Natural Science Foundation of China(61901241) and Open Research Funds of Shaanxi Key Laboratory of Information Communication Network and Security(ICNS201903).

摘要: 可重构智能表面(Reconfigurable Intelligent Surface,RIS)可以智能地调整无线传播环境来显著提升通信性能,相比传统的中继系统具有成本低、功耗低、易部署等特点,被视为6G的潜在关键技术之一。由于RIS可以动态地改变无线电波的相位特征,通过合理地调整相移可以实现网络的可伸缩性,灵活服务于网络中海量的物联网节点。为了进一步提升RIS辅助物联网传输系统的性能,提出了一个由RIS辅助物联网通信的双向传输系统,通过引入全双工技术和自干扰消除技术,有效提高了系统容量和传输效率。推导了所提系统的中断概率、平均误码率和平均信道容量的解析表达式,得到了系统性能与系统中RIS反射单元的数量等系统参数之间的函数关系。蒙特卡洛仿真验证了推导的准确性和所提方案的性能优势。

关键词: 可重构智能表面, 平均误码率, 平均信道容量, 双向, 物联网, 中断概率

Abstract: Reconfigurable intelligent surface(RIS) can intelligently change the wireless propagation environment to significantly improve the performance of wireless communication systems.Compared with traditional relay systems,it has the characteristics of low cost,low power consumption and easy deployment.It is regarded as one of the potential key technologies of 6G.Since RIS can dynamically change the phase characteristics of radio waves,the scalability of the network can be achievedby adjusting the phase shift reasonablely,and massive IoT nodes in the network can be flexibly served.In order to further improve the performance of the RIS-assisted IoT transmission system,a two-way RIS-assisted transmission system is proposed.By introducing full-duplex and self-interference cancellation technology,the system capacity and transmission efficiency are effectively improved.The analy-tical expressions for the outage probability,average bit error rate and average channel capacity of the proposed system are derived,and the relationship between system performance and system parameters such as the number of RIS reflecting elements in the system is obtained.The accuracy of the derivation and the performance advantages of the proposed scheme have been verified by Monte Carlo simulation.

Key words: Average bit error rate, Average channel capacity, Internet of Things, Outage probability, Reconfigurable intelligent surface, Two-way


  • TN929
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