Methods for service slice selection and separation
Embodiments include methods and apparatuses for providing access to a network slice in a communication system. In an embodiment, a network server that implements a Control Plane (CP) Network Function (NF) may receive a Non-Access Stratum (NAS) message from a wireless transmit and receive unit (WTRU). The NAS message comprises a Mobility Management (MM) message for registration and a Session Management (SM) messages for a specific service provided by the network slice. After selecting the network slice, the network server may transmit the SM message to another CP NF in the network slice to establish a communication link between the WTRU and the network slice.
1. A method implemented on a first network node, the method comprising:
receiving a session management (SM) message from a second network node, wherein the second network node is configured to implement a control plane (CP) Mobility Management (MM) function, wherein the first network node is configured to implement a CP SM function associated with a network slice, wherein the SM message indicates a request from a wireless transmit/receive unit (WTRU), and wherein the request from the WTRU is associated with establishment of a protocol data unit (PDU) session corresponding to the network slice; and
sending an SM response message to the second network node, the SM response message being sent to the second network node for delivery to the WTRU, the SM response message indicating that the WTRU will be served by the network slice via the established PDU session.
2. The method of claim 1 , wherein the SM response message is sent to the second network node for delivery to the WTRU in a non-access stratum (NAS) message.
3. The method of claim 1 , wherein the SM message comprises a request to establish the PDU session, and the SM response message comprises a response indicating that the establishment of the PDU session has been accepted by the first network node.
4. The method of claim 1 , wherein the SM response message indicates information associated with the network slice that is to be delivered to the WTRU.
5. The method of claim 1 , wherein the SM message further includes an authentication token indicating that the WTRU is authenticated.
6. The method of claim 5 , wherein the authentication token is generated based on identification information of the WTRU.
7. The method of claim 1 , wherein the network slice is a dedicated network slice.
8. A first network node comprising a processor and a memory configured to:
receive a session management (SM) message from a second network node, wherein the second network node is configured to implement a control plane (CP) Mobility Management (MM) function, wherein the first network node is configured to implement a CP SM function associated with a network slice, wherein the SM message indicates a request from a wireless transmit/receive unit (WTRU), and wherein the request from the WTRU is associated with establishment of a protocol data unit (PDU) session corresponding to the network slice; and
send a SM response message to the second network node, the SM response message being sent to the second network node for delivery to the WTRU, the SM response message indicating that the WTRU will be served by the network slice via the established PDU session.
9. The network node of claim 8 , wherein the SM response message is sent to the second network node for delivery to the WTRU in a non-access stratum (NAS) message.
10. The network node of claim 8 , wherein SM message comprises a request to establish the PDU session, and the SM response comprises a response indicating that the establishment of the PDU session has been accepted by the first network node.
11. The network node of claim 8 , wherein the SM response message indicates information associated with the network slice that is to be delivered to the WTRU.
12. The network node of claim 8 , wherein the SM message further includes an authentication token indicating that the WTRU is authenticated.
13. The network node of claim 12 , wherein the authentication token is generated based on identification information of the WTRU.
14. The network node of claim 8 , wherein the network slice is a dedicated network slice.
15. A wireless transmit/receive unit (WTRU) comprising a processor and a memory configured to:
send a session management (SM) message to a second network node for forwarding to a first network node, wherein the second network node is configured to implement a control plane (CP) Mobility Management (MM) function, wherein the first network node is configured to implement a CP SM function associated with a network slice, wherein the SM message indicates a request from the WTRU, and wherein the request from the WTRU is associated with establishment of a protocol data unit (PDU) session corresponding to the network slice; and
receive a SM response message from the first network node via a message received from the second network node, the SM response message indicating that the PDU session has been established for the WTRU for a user plane service associated with the network slice.
16. The WTRU of claim 15 , wherein the SM message is in a first non-access stratum (NAS) message and the SM response message is in a second NAS message.
17. The WTRU of claim 15 , wherein the WTRU is configured to utilize the user plane service association with the network slice via one or more user plane functions (UPFs).
18. The WTRU of claim 15 , wherein the SM response message indicates information associated with the network slice that is to be delivered to the WTRU.
19. The WTRU of claim 15 , wherein the SM message further includes an authentication token indicating that the WTRU is authenticated.
20. The WTRU of claim 15 , wherein the network slice is a dedicated network slice.