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Published in:
2021 | OriginalPaper | Chapter
9. Network Slicing and Management
Authors : Sameh Yamany, Luis M. Contreras
Published in: Future Networks, Services and Management
Publisher: Springer International Publishing
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Abstract
Network slicing is a paradigm through which different virtual resource elements of common shared infrastructure (in both connectivity and compute substrates) become allocated to a specific customer who perceives the resulting slice as a fully dedicated, self-contained network for it. The resources are virtualized through a process of abstraction of lower-level elements, providing great flexibility and independence when allocating specific elements to the customer. This process permits the exercise of advanced actions such as scalability, reliability, protection, relocation, etc., along the network slice lifetime, without impacting the customer service. All these possible actions represent an incredible asset for a novel way of service provisioning with respect to the conventional mode of network operation.
Network slicing, despite not being a new concept, acts as a foundational concept and systems to current 5G/future networks and service delivery, with the goal of providing dedicated private networks tailored to the needs of different verticals based on the specific requirements of a diversity of new services such as high-definition (HD) video, virtual reality (VR), V2X applications, and high-precision services. Network slicing is supported by the technological paradigms of software defined networking (SDN) and network function virtualization (NFV) in an integrated manner. These three concepts, SDN, NFV, and slicing, encompass the overall trend of network softwarization, governing the transformation of operational networks. All of them will form the basement for the evolution of the network towards 2030.