On the value of Beamforming and Coordination for Spectrum Sharing in mmWave Cellular Networks.

摘要: Spectrum sharing is not typically used in current cellular networks, because it only provides a slight performance improvement while requiring heavy coordination among different operators. However, these problems can be potentially overcome millimeter wave (mmWave) thanks to beamforming both at base stations and user equipments. This paper investigates up which extent spectrum mmWave networks with multiple operators viable alternative the traditional dedicated allocation. Specifically, we develop general mathematical framework characterize gain that users experience by as function of underlying beamforming, operator coordination, bandwidth, infrastructure scenarios. The based on joint station association optimization objective maximizing long-term throughput users. Asymptotic non-asymptotic analysis reveals 1) light on-demand intra- inter-operator feasible, especially higher frequencies (e.g., 73 GHz); 2) directional communications equipments substantially alleviate disadvantages sharing; 3) larger number antenna elements reduce need for simplify implementation 4) neglected large-antenna regime, intra-operator still bring gains balancing network load; 5) critical control signals stations, operators, should protected from adverse effects sharing, e.g., exclusive resource results this provide fundamental insights future standardization policy.