# Fog-assisted Caching Employing Solar Renewable Energy for Delivering Video on Demand Service

## TL;DR

This study demonstrates that using solar-powered fog data centers with energy storage significantly reduces power consumption in transport networks for video on demand services, achieving savings up to 77%.

## Contribution

It introduces an MILP model to optimize VoD delivery via solar-powered fog data centers, highlighting substantial energy savings over traditional cloud systems.

## Key findings

- Up to 77% reduction in transport network power consumption with fog data centers.
- Savings of up to 26% with renewable-powered cloud and fog data centers.
- Additional 14% savings with 50 kWh energy storage devices.

## Abstract

This paper examines the reduction in brown power consumption of transport networks and data centres achieved by caching Video-on-Demand (VoD) contents in solar-powered fog data centers with Energy Storage Devices (ESDs). A Mixed Integer Linear Programming (MILP) model was utilized to optimize the delivery from cloud or fog data centres. The results reveal that for brown-powered cloud and fog data centres with same Power Usage Effectiveness (PUE), a saving by up to 77% in transport network power consumption can be achieved by delivering VoD demands from fog data centres. With fully renewable-powered cloud data centres and partially solar-powered fog data centres, savings of up to 26% can be achieved when considering 250 m2 solar cells. Additional saving by up to 14% can be achieved with ESDs of 50 kWh capacity.

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Source: https://tomesphere.com/paper/1903.10250