Caching in SWIPT-Enabled Bidirectional Cooperative Hybrid Relaying Networks

Abstract

Caching and energy harvesting (EH) can be incor-porated to facilitate sustainable communication in future wireless applications such as internet of things (IoT)-based networks. In this context, we propose a cache-aided simultaneous wireless information and power transfer (SWIPT) scheme for a bidi-rectional cooperative hybrid relaying system wherein two source nodes communicate with each other via a hybrid decode-amplify-and-forward (HDAF) relay node. Considering a time-switching (TS) protocol for harvesting energy and probabilistic caching at the HDAF relay node, we derive novel analytical expressions of the exact and asymptotic outage probability, throughput and energy efficiency in a Nakagami-m fading environment. The correctness of the proposed analysis is verified through Monte Carlo simulations. Moreover, numerical results show the superiority of our proposed scheme over other existing schemes.