Method for associating network functions with a network slice instance of a mobile radio communication network

A method for associating network functions with a network slice instance of a mobile radio communication network comprising:

• a Network Slice Management Function, NSMF, creating an identifier for the network slice instance, NSI, for Operations Administration and Management, OAM, wherein the mobile radio communication network comprises a core network and an OAM system, wherein the OAM system comprises at least the NSMF which has interfaces to the network functions in the core network, wherein the network functions provide a communication service to a mobile terminal and wherein the core network further comprises a Network Repository Function, NRF, that maintains an association of network functions and network slice instances of the mobile radio communication network;
• the NSMF or the NRF notifying one or more network functions about their association with the network slice instance:
• and
• the one or more network functions directly notifying the NRF about their availability and capabilities.