Layered Content Delivery Over Satellite Integrated Cognitive Radio Networks

The inefficient and inflexible utilization of radio spectrum has led to the cognitive radio (CR) concept where licensed bands are allowed to be used by a secondary network without harming the primary user operation. The impact of this empirical deficiency in spectral resource management has been aggravated by the exploding content consumption over wireless networks, and this has led to calls for additional remedies. In 5G standards, device-to-device (D2D) communications and heterogeneous wireless networks are posed as two vital apparatus to alleviate this capacity crunch. In this letter, we consider such an environment and analyze content delivery over satellite integrated CR networks. We propose a novel state-based and event-driven system model and investigate its behavior. We focus on throughput, energy efficiency and quality as key performance metrics, hence rendering the gains offered by D2D and satellite transmissions in this heterogeneous system.