Journal
IEEE COMMUNICATIONS SURVEYS AND TUTORIALS
Volume 20, Issue 3, Pages 2429-2453Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/COMST.2018.2815638
Keywords
Network slice; 5G; network softwarization; orchestration; network management; NFV; SDN; cloud; mobile network; MANO; open source
Funding
- Academy of Finland Project CSN [311654]
- European Union's Horizon 2020 Research and Innovation Program through the 5G! Pagoda Project [723172]
- European Union's Horizon 2020 Research and Innovation Program through Global5G.org Project [761816]
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Network slicing has been identified as the backbone of the rapidly evolving 5G technology. However, as its consolidation and standardization progress, there are no literatures that comprehensively discuss its key principles, enablers, and research challenges. This paper elaborates network slicing from an end-to-end perspective detailing its historical heritage, principal concepts, enabling technologies and solutions as well as the current standardization efforts. In particular, it overviews the diverse use cases and network requirements of network slicing, the pre-slicing era, considering RAN sharing as well as the end-to-end orchestration and management, encompassing the radio access, transport network and the core network. This paper also provides details of specific slicing solutions for each part of the 5G system. Finally, this paper identifies a number of open research challenges and provides recommendations toward potential solutions.
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