Physical layer caching in 5G wireless networks

Abstract

The spectral efficiency of small-cell wireless networks is limited by the severe interference from the neighboring base stations (BSs) as well as the backhaul capacity of the BSs. In this thesis, we propose a physical layer (PHY) caching scheme to address these two issues. To address the interference issue, by properly caching some popular contents at the BSs, the proposed PHY-caching can opportunistically transform the topology of the radio access network (RAN) from an unfavorable topology (e.g., relay or interference topology) into a more favorable multiple-input and multiple-output (MIMO) broadcast topology and enjoy spectrum efficiency gain without large backhaul consumption. To address the backhaul issue, we consider a joint design of frequency reuse and caching in small-ce...[ Read more ]