Degrees of Freedom of Cache-Aided Wireless Interference Networks

Understand

We study the role of caches in wireless interference networks.

• We focus on content caching and delivery across a Gaussian interference network, where both transmitters and receivers are equipped with caches.
• We provide a constant-factor approximation of the system's degrees of freedom (DoF), for arbitrary number of transmitters, number of receivers, content library size, receiver cache size, and transmitter cache size (as long as the transmitters combined can store the entire content library among them).
• We demonstrate approximate optimality with respect to information-theoretic bounds that do not impose any restrictions on the caching and delivery strategies.