The three primary colors of mobile systems

TL;DR

This paper introduces the concept of 'mobile 3C systems' emphasizing Communications, Computing, and Caching as the three core resources essential for future mobile network growth, highlighting their roles and interactions.

Contribution

It formalizes the 3C framework, demonstrating how caching and computing influence system performance and capacity, and unifies existing techniques under this new analytical paradigm.

Findings

Caching introduces non-causality in systems

Computing enhances capacity through logical operations

The 3C framework unifies various capacity techniques

Abstract

In this paper, we present the notion of "mobile 3C systems in which the "Communications", "Computing", and "Caching" (i.e., 3C) make up the three primary resources/funcationalties, akin to the three primary colors, for a mobile system. We argue that in future mobile networks, the roles of computing and caching are as intrinsic and essential as communications, and only the collective usage of these three primary resources can support the sustainable growth of mobile systems. By defining the 3C resources in their canonical forms, we reveal the important fact that "caching" affects the mobile system performance by introducing non-causality into the system, whereas "computing" achieves capacity gains by performing logical operations across mobile system entities. Many existing capacity-enhancing techniques such as coded multicast, collaborative transmissions, and proactive content pushing can be cast into the native 3C framework for analytical tractability. We further illustrate the mobile 3C concepts with practical examples, including a system on broadcast-unicast convergence for massive media content delivery. The mobile 3C design paradigm opens up new possibilities as well as key research problems bearing academic and practice significance.