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To accommodate various use cases with differing characteristics, the FifthGeneration (5G) mobile communications system intends to utilize networkslicing. Network slicing enables the creation of multiple logical networks overa shared physical network infrastructure. While the problems such as resourceallocation for multiple slices in mobile networks have been explored inconsiderable detail in the existing literature, the suitability of the existingmobile network architecture to support network slicing has not been analysedadequately. We think the existing 5G System (5GS) architecture suffers fromcertain limitations, such as a lack of slice isolation in its control plane.This work focuses on the future evolution of the existing 5GS architecture froma slicing perspective, especially that of its control plane, addressing some ofthe limitations of the existing 5GS architecture. We propose a new networkarchitecture which enables efficient slicing in beyond 5G networks. Theproposed architecture results in enhanced modularity and scalability of thecontrol plane in sliced mobile networks. In addition, it also brings sliceisolation to the control plane, which is not feasible in the existing 5Gsystem. We also present a performance evaluation that confirms the improvedperformance and scalability of the proposed system viz a viz the existing 5Gsystem.

An Architecture for Control Plane Slicing in Beyond 5G Networks