Network Slicing: Recent Advances, Taxonomy, Requirements, and Open Research Challenges

Latif U. Khan, Ibrar Yaqoob, Nguyen H. Tran, Zhu Han, Choong Seon Hong
2020 IEEE Access  
Fifth-generation (5G) and beyond networks are envisioned to provide multi-services with diverse specifications. Network slicing is identified as a key enabling technology to enable 5G networks with multi-services. Network slicing allows a transition from a network-as-an-infrastructure setup to a networkas-a-service to enable numerous 5G smart services with diverse requirements. Although several surveys and tutorials have discussed network slicing in detail, there is no comprehensive study
more » ... sing the taxonomy and requirements of network slicing. In this paper, we present and investigate key recent advances of network slicing towards enabling several Internet of Things (IoT) smart applications. A taxonomy is devised for network slicing using different parameters: key design principles, enablers, slicing resources levels, service function chaining schemes, physical infrastructures, and security. Furthermore, we discuss key requirements for network slicing to enable smart services. Finally, we present several open research challenges along with possible guidelines for network slicing. INDEX TERMS 5G, 6G, network slicing, software-defined networking, network function virtualization, Internet of Things. The associate editor coordinating the review of this manuscript and approving it for publication was Zhenyu Zhou . hand, smart agriculture generally has lower latency requirements than smart transportation systems [1]. Therefore, smart transportation slices must be more latency sensitive than smart agriculture slices. Several methods can enable network slicing. One possible approach is using a dedicated end-to-end network for every service. However, this approach will significantly increase the operational cost [7] . Therefore, it is a viable solution to enable shared usage of a common physical infrastructure for different smart services [8] . The physical infrastructure includes wireless access networks, edge computing servers, cloud computing, satellites, unmanned aerial vehicles, and Wi-Fi access points, to name a few. Enabling smart IoT services via network slicing requires successful interaction between a variety of physical infrastructure players. To enable interaction between these different physical infrastructures via network slicing, numerous challenges need to be resolved. These challenges are interoperability, mobility-awareness, efficient end-to-end orchestration, and novel business models. VOLUME 8, 2020 This work is licensed under a Creative Commons Attribution 4.0 License. For more information, see
doi:10.1109/access.2020.2975072 fatcat:zdvqh3orajbure36k2dbnlmfae