Performance of Non-Orthogonal Multiple Access (NOMA) in a C-RAN System

Abstract

Cloud radio access network(C-RAN) has been proposed as a novel mobile network architecture allowing centralized processing. Resource allocation (RA) is the core task in order to coordinate transmissions.In this paper efficient resource allocation technique in non-orthogonal multiple access (NOMA) based C-RAN systems is proposed. The task of RA is solved by centralized solutions in a C-RAN.The problem of maximizing the weighted sum-rate of users with target quality of service(QoS)is addressed subject to various constraints. The problem is divided into sub- problems and then sub-optimal solutions are proposed. Numerical experiments show that the proposed algorithms can improve the system performance as compared to orthogonal multiple access(OMA)-based C-RAN systems.