Charging control for non-public network
A session management function sends, to a policy control function, a policy request message. The policy request message comprises a non-public network identifier of a non-public network through which a wireless device accesses a public land mobile network. The policy request message comprises an identifier of the public land mobile network. The session management function receives, from the policy control function, a policy response message comprising a charging control policy.
1. A method comprising:
sending, by a session management function (SMF) to a policy control function (PCF), a policy request message comprising:
a non-public network (NPN) identifier of an NPN through which a wireless device accesses a public land mobile network (PLMN); and
a PLMN identifier of the PLMN; and
receiving, by the SMF from the PCF, a policy response message comprising a charging control policy.
2. The method of claim 1 , further comprising receiving, by the SMF from an access and mobility management function (AMF), a message comprising one or more of the NPN identifier and the PLMN identifier.
3. The method of claim 2 , wherein the message comprises at least one of:
a data network name (DNN);
a single network slice selection assistance information (S-NSSAI); and
a packet data unit (PDU) session identifier.
4. The method of claim 2 , wherein the sending the policy request message is based on the receiving the message from the AMF.
5. The method of claim 1 , further comprising sending, by the SMF to a charging function, a charging data request message based on the policy response message.
6. The method of claim 5 , wherein the charging data request message comprises the PLMN identifier.
7. The method of claim 1 , wherein the policy request message further comprises at least one of:
a wireless device identifier of the wireless device;
a data network name (DNN);
a single network slice selection assistance information; or
a packet data unit session identifier.
8. The method of claim 1 , wherein the policy response message comprises at least one of:
a charging control rule;
the NPN identifier;
a single network slice selection assistance information (S-NSSAI); and
a packet data unit (PDU) session identifier.
9. The method of claim 1 , further comprising determining, by the SMF, one or more user plane rules for the NPN based on the charging control policy.
10. The method of claim 9 , further comprising sending the one or more user plane rules for the NPN to a user plane function (UPF).
11. A method comprising:
receiving, by a policy control function (PCF) from a session management function (SMF), a policy request message comprising:
a non-public network (NPN) identifier of an NPN through which a wireless device accesses a public land mobile network (PLMN); and
a PLMN identifier of the PLMN; and
sending, by the PCF to the SMF, a policy response message comprising a charging control policy.
12. The method of claim 11 , further comprising determining, by the PCF, the charging control policy.
13. The method of claim 12 , wherein the determining the charging control policy is based on the NPN identifier.
14. The method of claim 12 , wherein the determining the charging control policy is based on the PLMN identifier.
15. The method of claim 12 , further comprising sending, by the PCF to a unified data repository (UDR), a subscription request message comprising the PLMN identifier and the NPN identifier.
16. The method of claim 15 , further comprising receiving, by the PCF from the UDR, charging control information for the NPN.
17. The method of claim 16 , further comprising determining a charging control rule for the NPN based on the charging control information for the NPN received from the UDR.
18. The method of claim 16 , wherein the determining the charging control policy is based on the charging control information for the NPN received from the UDR.
19. The method of claim 11 , wherein the policy request message further comprises at least one of:
a wireless device identifier of the wireless device;
a data network name;
a single network slice selection assistance information; or
a packet data unit session identifier.
20. A system, comprising:
a session management function (SMF) comprising: one or more processors and memory storing instructions that, when executed by the one or more processors, cause the SMF to:
send a policy request message comprising:
a non-public network (NPN) identifier of an NPN through which a wireless device accesses a public land mobile network (PLMN); and
a PLMN identifier of the PLMN; and
receive a policy response message comprising a charging control policy; and
a policy control function (PCF) comprising: one or more processors and memory storing instructions that, when executed by the one or more processors, cause the PCF to:
receive the policy request message; and
send the policy response message.