Institute of Electrical & Electronic Engineers
In this paper, the authors consider a downlink Cloud Radio Access Network (C-RAN) in which all the Base-Stations (BSs) are connected to a central computing cloud via digital backhaul links with finite capacities. Each user is associated with a user-centric cluster of BSs; the central processor shares the user's data with the BSs in the cluster, which then cooperatively serve the user through joint beamforming. Under this setup, this paper investigates the user scheduling, BS clustering and beamforming design problem from a network utility maximization perspective. This paper explicitly considers the per-BS backhaul capacity constraints.