  There are a large number of vertical industries implementing multiple use
cases, each use case characterized by diverging service, network, and
connectivity requirements such as automobile, manufacturing, power grid, etc.
Such heterogeneity cannot be effectively managed and efficiently mapped onto a
single type of network slice instance (NSI). Thus the tailored provisioning of
an end-to-end network slicing solution to a vertical industry that consists of
multiple use cases is a critical issue, which motivates this article, aimed at
exploring this never-addressed and challenging research problem by proposing
the Use-case Specific Network Slicing and the SubNetwork Slicing concepts that
enable the provisioning of Use-case-specific NSI(US-NSI) and GeNeric
NSI(GN-NSI), respectively. Both approaches tackle the same technical issue of
provisioning, management, and orchestration of per vertical per use case NSIs
in order to improve resource allocation and enhance network performance. The
article also presents the architectural frameworks for managing US-NSI and
GN-NSI, which extend the service deployment concept and system architecture of
network slicing for vertical customers of fifth-generation (5G) mobile
networks.
