Discovery and selection of UPF for uplink classifier
View Patent ↗A session management function receives, by from an access and mobility management function, a request for a packet data unit session for a wireless device. The session management function determines that the packet data unit session for the wireless device requires a user plane function that supports an uplink classifier functionality. The session management function sends a first message requesting a discovery of the user plane function to a network repository function based on the determining. The first message comprises an uplink classifier indication parameter. The session management function receives a second message comprising an identifier of the user plane function from the network repository function based on the first message. The session management function sends a third message to the user plane function. The third message request establishment of a connection between the session management function and the user plane function.
1. A method comprising:
receiving, by a session management function from an access and mobility management function, a request for a packet data unit session for a wireless device;
determining, by the session management function, that the packet data unit session for the wireless device requires a user plane function that supports an uplink classifier functionality;
sending, by the session management function to a network repository function and based on the determining, a first message requesting a discovery of the user plane function, the first message comprising an uplink classifier indication parameter;
receiving, by the session management function from the network repository function and based on the first message, a second message comprising an identifier of the user plane function; and
sending, by the session management function to the user plane function, a third message requesting to establish a connection between the session management function and the user plane function.
2. The method of claim 1 , wherein the third message comprises an identifier of the connection between the session management function and the user plane function.
3. The method of claim 1 , wherein the request for the packet data unit session for the wireless device comprises a request to create the packet data unit session for the wireless device.
4. The method of claim 3 , wherein the request to create the packet data unit session comprises:
an identifier of the packet data unit session; and
network slice information of the packet data unit session.
5. The method of claim 3 , further comprising sending, by the session management function to the access and mobility management function, a response message indicating a result of the request to create the packet data unit session.
6. The method of claim 3 , wherein the request to create the packet data unit session is in response to a session creation request by the wireless device.
7. The method of claim 1 , further comprising receiving, by the session management function from the user plane function, a response message indicating a result of the third message.
8. The method of claim 1 , further comprising selecting, by the network repository function, the user plane function based on the uplink classifier indication parameter.
9. The method of claim 1 , wherein the request for the packet data unit session for the wireless device comprises a request to modify the packet data unit session for the wireless device.
10. The method of claim 9 , wherein the request to modify the packet data unit session is in response to a session modification request by the wireless device.
11. The method of claim 9 , further comprising sending, by the session management function to the access and mobility management function, a response message indicating a result of the request to modify the packet data unit session.
12. The method of claim 1 , wherein the second message further comprises at least one capability information of the user plane function.
13. The method of claim 12 , wherein the at least one capability information of the user plane function comprises a traffic routing capability of the user plane function.
14. The method of claim 13 , wherein the traffic routing capability indicates that the user plane function supports an ipv6 multi-homing functionality.
15. The method of claim 1 , wherein the second message further comprises at least one of:
an identifier of the user plane function;
an IP address of the user plane function;
a fully qualified domain name of the user plane function; or
a profile of the user plane function.
16. The method of claim 1 , further comprising sending, by the session management function to the user plane function, a session association setup request.
17. The method of claim 16 , wherein the session association setup request comprises an N4 session association setup request.
18. The method of claim 16 , further comprising receiving, by the session management function from the user plane function, a session association setup response.
19. The method of claim 16 , wherein the session association setup request comprises:
an address of the user plane function; or
a fully qualified domain name of the user plane function.
20. The method of claim 1 , wherein the uplink classifier functionality comprises:
at least one packet filtering rule;
at least one traffic detection rule; or
at least one traffic forwarding rule.