基于RIS的车路协同反向散射保密通信方法OA

Considering the unprecedented requirement of energy consumption and network lifetime in future Internet of vehicles(IoV),the BackCom and RIS technologies are leveraged in vehicle-to-infrastructure(V2I)wireless communication systems to meet the scenarios and requirements of the extensive infrastructure deployment.These two technologies can accomplish passive low-power data transmission without radio frequency components.In the introduced system model,a RIS mounted on roadside infrastructure sends confidential information to multiple legitimate users by backscattering the signals from a nearby base station.However,there is a risk of eavesdropping on the backscattered signals.Hence,we consider that multiple eavesdroppers attempt to intercept the RIS's information and the goal is to maximize the minimum secrecy rate by jointly optimizing the active beamformer at the base station and the reflection coefficient of RIS.Finally,tremendous simulations are implemented based on an alternative algorithm to demonstrate the feasibility and effectiveness of the considered system and the proposed optimization schemes.