Cloud radio access network (C-RAN): a primer

• Published in: IEEE network Vol. 29; no. 1; pp. 35 - 41
• Main Authors: Wu, Jun, Zhang, Zhifeng, Hong, Yu, Wen, Yonggang
• Format: Journal Article
• Language: English
• Published: New York IEEE 01-01-2015; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Algorithms; Architecture; Architecture (computers); Base stations; Cloud computing; Communications networks; Computer architecture; Interference; Internet; Mobile communication; Networks; Operators; Planes; Power demand; Radio; Radio access networks; Radio communication; Resource management
• ISSN: 0890-8044; 1558-156X
• DOI: 10.1109/MNET.2015.7018201

In the era of mobile Internet, mobile operators are facing pressure on ever-increasing capital expenditures and operating expenses with much less growth of income. Cloud Radio Access Network (C-RAN) is expected to be a candidate of next generation access network techniques that can solve operators' puzzle. In this article, on the basis of a general survey of C-RAN, we present a novel logical structure of C-RAN that consists of a physical plane, a control plane, and a service plane. Compared to traditional architecture, the proposed C-RAN architecture emphasizes the notion of service cloud, service-oriented resource scheduling and management, thus it facilitates the utilization of new communication and computer techniques. With the extensive computation resource offered by the cloud platform, a coordinated user scheduling algorithm and parallel optimum precoding scheme are proposed, which can achieve better performance. The proposed scheme opens another door to design new algorithms matching well with C-RAN architecture, instead of only migrating existing algorithms from traditional architecture to C-RAN.