Security Performance of the Distributed Antenna IoT Network with Full-Duplex Wireless Power Transfer

Abstract

Conventional cryptographic method faces enormous issues in future internet of things (IoT) networks such as key distribution and computational complexity. Physical layer security has been concerned as a potential technology for IoT networks. In this paper, we investigate the secrecy performance of a distributed antenna IoT network with full-duplex (FD) wireless power transfer. Under the composite wireless channel assumption, we establish the model for receiving signal to interference plus noise ratio (SINR) of both hybrid distributed antennas and the eavesdropper. The closed-form expressions for secrecy capacity of the IoT network is derived with the consideration of impact from both jammers and the eavesdropper. Furthermore, the secrecy outage probability in terms of target secrecy data rate is derived. Simulation results show both secrecy capacity and secrecy outage probability under different network configurations, which evince the effect of the distributed antenna number, the self-interference cancellation factor, and the target secrecy rate on the secrecy performance.