Performance Analysis and Optimization of Cooperative Caching in Cellular Networks

This paper analyzes the performance of cooperative caching for cellular networks by modeling the locations of base stations as a homogeneous Poisson point process, where each base station is equipped with a storage to cache the content and has cooperation with its neighboring base stations. With the proposed probabilistic cooperative caching strategy, the analytical expressions of system performance are derived and simulation results are presented to show that our analytical results closely match the numerical performance observed from the simulations. The study shows that with cooperative caching, the performance in terms of caching content delivery outage, caching content delivery delay and network congestion can indeed be improved. The paper further proposes an approximated solution for optimal probabilistic cooperative caching.