Link-Level Access Cloud Architecture Design Based on SDN for 5G Networks
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AuthorAmeigeiras Gutiérrez, Pablo José; Ramos Muñoz, Juan José; Schumacher, L.; Prados-Garzon, Jonathan; Navarro Ortiz, Jorge; López Soler, Juan Manuel
Institute of Electrical and Electronics Engineers (IEEE)
P. Ameigeiras, J. J. Ramos-munoz, L. Schumacher, J. Prados-Garzon, J. Navarro-Ortiz and J. M. Lopez-soler, "Link-level access cloud architecture design based on SDN for 5G networks," in IEEE Network, vol. 29, no. 2, pp. 24-31, March-April 2015, doi: 10.1109/MNET.2015.7064899.
SponsorshipThis work is partially supported by the Spanish Ministry of Economy and Competitiveness (project TIN2013-46223-P), and the Granada Excellence Network of Innovation Laboratories (projects GENIL-PYR-2014-20 and GENIL-PYR-2014-18).
The exponential growth of data traffic and connected devices, and the reduction of latency and costs, are considered major challenges for future mobile communication networks. The satisfaction of these challenges motivates revisiting the architecture of these networks. We propose an SDN-based design of a hierarchical architecture for the 5G packet core. In this article we focus on the design of its access cloud with the goal of providing low latency and scalable Ethernet-like support to terminals and MTC devices including mobility management. We examine and address its challenges in terms of network scalability and support for link-level mobility. We propose a link-level architecture that forwards frames from and to edge network elements (AP and routers) with a label that identifies the APs through which the terminal is reachable. An SDN local controller tracks and updates the users' location information at the edge network elements. Additionally, we propose to delegate in SDN local controllers the handling of non-scalable operations, such as broadcast and multicast messages, and network management procedures.