Network Slice Selection Function (NSSF)
Network Slice Selection Function is a functional element that supports
selection of the Network Slice instances that will serve a particular
device. As such, the NSSF will determine the Allowed NSSAI (Network
Slice Selection Assistance Information) that is supplied to the device.
Moreover, the NSSF may be used to allocate an appropriate AMF
if the current AMF is not able to support all network slice instances for a given device.
