Computer Science ›› 2022, Vol. 49 ›› Issue (6): 19-24.doi: 10.11896/jsjkx.220100064

• Smart IoT Technologies and Applications Empowered by 6G • Previous Articles     Next Articles

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).

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

CLC Number: 

  • TN929
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