A Secure Energy Efficient Multi-User Selection Scheme for SWIPT Wireless IoT Networks in the Presence of Cooperative Jamming

In this paper, a downlink wiretap channel simultaneous information and power transfer (SWIPT) system model is proposed for Internet of Things (IoT) networks. The system model comprises of a single antenna base station, two energy constrained legitimate sensor nodes each equipped with two antennae i.e one antenna for information reception and the other for energy harvesting. Also, the system is assumed to suffer from the presence of passive single antenna non-collaborating eavesdropping nodes. The legitimate and eavesdropping channels are assumed to follow the quasi-static Rayleigh fading distribution. Particularly, closed form expressions for the probability density function (PDF) and cumulative density function (CDF) of signal-to-noise ratio (SNR) of the non-collaborating eavesdropping scenario are derived. Additionally, closed form expressions for the exact secrecy outage probability (SOP) and secrecy throughput are derived. Finally, numerical results are used to validate the theoretical analysis.