Method and apparatus for performing MM attach and service request procedure for network slice based new radio access technology in wireless communication system

1. A method for performing a mobility management (MM) attach and service request procedure by a radio access network (RAN) node in a wireless communication system, the method comprising:

receiving, by the RAN node, a network connection request, a service request and slice related information from a user equipment (UE);

determining a dedicate common control plane function (C-CPF) based on the slice related information; and

routing, by the RAN node, the network connection, request and the service request to the determined dedicate C-CPF.

2. The method of claim 1 , wherein the slice related information corresponds to a multi-dimensional descriptor (MDD) identifier (ID).

3. The method of claim 2 , wherein the MDD ID consists of a tenant ID and a slice type.

4. The method of claim 3 , wherein the tenant ID identifies a tenant to which an operator leases its network infrastructure.

5. The method of claim 3 , wherein the slice type identifies a network behavior.

6. The method of claim 1 , further comprising receiving a first response to the network connection request and the service request from the dedicate C-CPF,

wherein the first response includes a C-CPF ID and a final selected slide related ID.

7. The method of claim 6 , wherein the C-CPF ID includes at least one of a dedicate core network (DCN) ID or a multi-dimensional descriptor (MDD) ID.

8. The method of claim 6 , wherein the final selected slice related ID includes at least one of a core network instance (CNI) ID, a domain network name (DNN) ID, a tenant ID, or a slice type ID.

9. The method of claim 6 , further comprising transmitting a second response to the network connection request and the service request to the UE,

wherein the second response includes a C-CPF ID and a final selected slide related ID.

10. A radio access network (RAN) node in a wireless communication system, the RAN node comprising:

a memory; and

a processor, coupled to the memory, that:

receives a network connection request, a service request and slice related information from a user equipment (UE);

determines a dedicate common control plane function (C-CPF) based on the slice related information; and

routes the network connection, request and the service request to the determined dedicate C-CPF.

11. The RAN node of claim 10 , wherein the slice related information corresponds to a multi-dimensional descriptor (MDD) identifier (ID).

12. The RAN node of claim 11 , wherein the MDD ID consists of a tenant ID and a slice type.

13. The RAN node of claim 12 , wherein the tenant ID identifies a tenant to which an operator leases its network infrastructure.

14. The RAN node of claim 12 , wherein the slice type identifies a network behavior.

15. The RAN node of claim 10 , wherein the processor further receives a first response to the network connection request and the service request from the dedicate C-CPF,

wherein the first response includes a C-CPF ID and a final selected slide related ID.

16. The RAN node of claim 15 , wherein the C-CPF ID includes at least one of a dedicate core network (DCN) ID or a multi-dimensional descriptor (MDD) ID.

17. The RAN node of claim 15 , wherein the final selected slice related ID includes at least one of a core network instance (CNI) ID, a domain network name (DNN) ID, a tenant ID, or a slice type ID.

18. The RAN node of claim 15 , wherein the processor further transmits a second response to the network connection request and the service request to the UE,

wherein the second response includes a C-CPF ID and a final selected slide related ID.