Resource Allocation in NOMA based Fog Radio Access Networks

In the wake of growth in intelligent mobile devices and wide usage of bandwidth-hungry applications of mobile Internet, the demand of wireless data traffic and ubiquitous mobile broadband is rapidly increasing. On account of these developments, the research on fifth generation (5G) networks presents an accelerative tendency on a global scale. Edge computing draw lots of attention for reducing the time delay and improving the Quality of Service for the networks. While, fog radio access networks (F-RANs) is an emergent architecture, which takes full use of edge computing and distributed storing capabilities in edge devices. In this article, we propose an architecture of non-orthogonal multiple access (NOMA) based F-RANs, which has a strong capability of edge computing and can meet the heterogeneous requirements in 5G systems. NOMA with successive interference cancellation (SIC) is regarded as a critical multi-user access technology. In NOMA, more than one user can access the same time, code domain, and frequency resources. With assigning different power levels to multi-user and implementing SIC, multiple users detection can be achieved. In this article, we provide a description of the NOMA based F-RANs architecture, and discuss the resource allocation in that. We will focus on the power and Haijun Zhang and Keping Long are with the Engineering and Technology Research Center for Convergence Networks, University of Science and Technology Beijing, Beijing, 100083, China (e-mail: [email protected], [email protected]). Yu Qiu is with College of Information Science and Technology, Beijing University of Chemical Technology, Beijing, 100029, China (e-mail: [email protected]). George K. Karagiannidis is with Aristotle University of Thessaloniki, Thessaloniki , Greece (e-mail: [email protected]). Xianbin Wang is with University of Western Ontario, London, Canada (e-mail: [email protected]). Arumugam Nallanathan is with Queen Mary University of London, United Kingdom (e-mail: [email protected]). March 16, 2018 DRAFT