Caching Heterogeneous Size Content in Small Cell Networks with CoMP Joint Transmissions

In 5G and beyond network architectures, operators and content providers base their content distribution strategies on small cell networks. On top of such networks, edge caching and Coordinated Multi-Point (CoMP) Joint Transmissions are used to improve performance. Online solutions for average delay minimization problem have been studied in the related literature, although only under the strong assumption that files have equal sizes. In this paper we aim to fill this gap and propose an online caching policy, qLRU-HS, that takes into account heterogeneous sizes and asymptotically converges to the optimal cache allocation under the Independent Reference Model. Our experiments confirm such convergence in practice and reveal that qLRU-HS outperforms other state-of-the-art solutions.