Towards Scalable and Cost-efficient Software-Defined 5G Core Network

  • Published : 2016.05.31

Abstract

Network and network functions virtualization (NFV) promise a number of attractive benefits and thus have driven mobile network operators to transform their previously static networks to more dynamic and software-defined networks. In this article, we share a mobile network operator's view based on implementation and deployment experiences in the wild during the past few years towards a software-defined 5G core network. More specifically, we present a practical point of view from mobile network operators and elaborate on why some of the virtualization benefits such as total cost of ownership (TCO) reduction are not easily realized as initially intended. Then, we describe 5G visions, services, and their requirements commonly agreed across mobile operators globally. Given the requirements, we then introduce desirable characteristics of 5G mobile core network and its key enabling technologies.

Keywords

References

  1. European Telecommunications Standard Institute, "Network Functions Virutalization", https://portal.etsi.org/Portals/0/TBpages/NFV/Docs/NFVWhitePaper3.pdf, October 2014.
  2. Open Networking Foundation, "Software-Defined Networking: The New Norm for Networks", https://www.opennetworking.org/images/stories/downloads/sdn-resources/white-papers/wp-sdnnewnorm.pdf, April 2012.
  3. R. Enns, M. Bjorklund, J. Schoenwaelder, A. Bierman, "RFC 6241: Network Configuration Protocol (NETCONF)", June 2011.
  4. Next Generation Mobile Networks Alliance, "5G White Paper", https://www.ngmn.org/uploads/media/NGMN5GWhitePaperV10.pdf, February 2015.
  5. A. Osseiran et al., "Scenarios for the 5G Mobile and Wireless Communications: the Vision of the METIS Project", May 2014.
  6. 4G Americas, "4G Americas Recommendations on 5G Requirements and Solutions", October 2014.
  7. Ericsson Research, "5G Systems", http://www.ericsson.com/res/docs/whitepapers/what-is-a-5gsystem.pdf, January 2015.
  8. Nokia Networks, "Looking Ahead to 5G", http://networks.nokia.com/sites/default/files/document/5gwhitepaper0.pdf, 2014.
  9. Fraunhoger-Institute for Open Communications Systems FOKUS, "Towards the 5G Environment: Making Research Steps with Meaningful Results", http://www.open5gcore.net/files/FOKUS5GMeaningfulResearchWhitepaper.pdf, Auguest 2014.