Modeling and Analysis for Cache-Enabled Networks with Dynamic Traffic

TL;DR

This paper analyzes cache-enabled networks considering dynamic traffic, modeling request arrivals and departures, and proposes interference cancellation using cached packets, with verified simulation results.

Contribution

It introduces a traffic dynamic model for cache-enabled networks and leverages cached data for interference cancellation, which is a novel approach.

Findings

Probabilities of different cell load states are derived.

Packet loss rates are quantified for cache-enabled and cache-untenable users.

Simulation results confirm the analytical models.

Abstract

Instead of assuming fully loaded cells in the analysis on cache-enabled networks with tools of stochastic geometry, we focus on the dynamic traffic in this letter. With modeling traffic dynamics of request arrivals and departures, probabilities of full-, free-, and modest-load cells in the large-scale cache-enabled network are elaborated based on the traffic queue state. Moreover, we propose to exploit the packets cached at cache-enabled users as side information to cancel the incoming interference. Then the packet loss rates for both the cache-enabled and cache-untenable users are investigated. The simulation results verify our analysis.