A Location Prediction-based Physical Layer Security Scheme for Suspicious Eavesdroppers

This paper aims to help save energy when legitimate users exploit physical layer security techniques to guarantee security, which can suit resource limited systems more. It proposes a risk prediction scheme in a communication scene with a mobile eavesdropper, whose CSI (Channel State Information) is unknown to legitimate users. The scheme can predict where the eavesdropper will be later and decide whether security measures should be taken to against it. The security measures are only taken when the prediction result shows there will be risks in the communication process. Based on the proposed scheme, resources can be saved to a large degree as well as the security guaranteed.