Outage Probability Analysis for Downlink Interference-Limited Wireless Edge Networks with Caching, Computing, and Communications

Abstract

Since many new applications require a combination of caching, computing, and communications (3C), there is an increasing interest in the optimization of networks that jointly perform 3C. Although a number of studies for particular designs of such networks have been published, the characterization of fundamental performance limits has been rarely explored. Aiming to fill this gap, this paper provides an asymptotic outage analysis for downlink interference-limited wireless edge networks with joint 3C. In particular, we derive analytical closed-form expressions as functions of delay and 3C parameters for outage probability and optimal caching policy, respectively. Based on these, we then derive insightful outage probability expressions for the optimal caching policy and two important reference caching policies using asymptotic analysis. We provide insights and interpretations based on the derived expressions. Computer simulations validate our analytical results and insights.