Abstract
Recent years have seen both mobile devices become more prominent and rapid growth in video traffic across mobile networks. This trend is expected to continue with the main constraint on mobile devices being their battery life. With the growth in performance potential, users want more out of their devices which leads to issues including battery powered mobile devices not being capable of surviving a full day of use without recharging. This is especially a concern for users who wish to view multimedia content which is associated with very high energy consumption rates. A distributed ENergy aware COoperative multimedia delivery solution (ENCO) is proposed which achieves a trade-off between quality and energy based on user preferences, minimising energy consumption while maintaining good user Quality of Experience (QoE) levels. ENCO monitors the stream quality and energy consumption of the user device, selects the source host to acquire the stream from and adapts stream quality based on the monitored measurements. Simulation-based testing is performed in different scenarios with the proposed solution compared against two alternative schemes in terms of throughput, energy consumption, packet loss and PSNR. Results show how ENCO significantly outperforms the comparative studies with minimum PSNR improvements of 30% while maintaining low energy costs.