Coded Caching at the Edge of Satellite Networks

TL;DR

This paper extends coded caching techniques to satellite network edges, deriving a closed-form expression for backhaul load and demonstrating significant performance gains over existing schemes.

Contribution

It introduces a novel application of coded caching in two-tier satellite networks and provides analytical performance evaluation.

Findings

Significant reduction in backhaul load with coded caching

Closed-form expression for average backhaul load

Performance gains over benchmark caching schemes

Abstract

Caching multimedia contents at the network edge is a key solution to decongest the amount of traffic in the backhaul link. In this paper, we extend and analyze the coded caching technique [1] in an unexplored scenario, i.e. at the edge of two-tier heterogeneous networks with an arbitrary number of users. We characterize the performance of such scheme by deriving a closed-form expression of the average backhaul load and reveal a significant gain compared to other benchmark caching schemes proposed in the literature.