Tracking QoS violated events

1. A method comprising:

receiving, by a session management function (SMF) from a policy control function (PCF), a policy associated with an application function (AF) request, wherein the policy indicates the SMF to report a packet delay;

according to the policy, requesting by the SMF, an access network (AN) node to report a packet delay between the AN node and a user equipment (UE), and a user plane function (UPF) to report a packet delay between the AN node and the UPF;

receiving, by the SMF, one or more indications of the packet delay between the AN node and the UE and the packet delay between the AN node and the UPF; and

sending, by the SMF to the AF, a report associated with both the packet delay between the AN node and the UE and the packet delay between the AN node and the UPF.

2. The method according to claim 1 , wherein the report is sent from the SMF to the AF without involving the PCF, wherein the policy further indicates the SMF to report the packet delay to the AF.

3. The method according to claim 1 , wherein the report is sent from the SMF to the PCF which is configured to send the report to the AF, wherein the policy further indicates the SMF to report the packet delay to the PCF.

4. The method according to claim 1 , wherein the packet delay to be reported as the policy indicated is an end-to-end packet delay.

5. The method according to claim 4 , wherein the packet delay includes one or more of: an uplink packet delay and a downlink packet delay.

6. The method according to claim 4 , wherein the policy further indicates how often to report the packet delay, and the SMF sends the report according to the policy.

7. The method according to claim 4 , wherein the policy further indicates to periodically report the packet delay, and the SMF sends the report periodically.

8. The method according to claim 4 , wherein the policy further indicates to report the packet delay when the packet delay exceeds a threshold, and the SMF sends the report when the packet delay exceeds the threshold.

9. The method according to claim 4 , wherein the policy further indicates to report the packet delay when the PDU session is released, and the SMF sends the report when the PDU session is released.

10. The method according to claim 4 , wherein the report includes the end-to-end packet delay, wherein the end-to-end packet delay is a calculation result of the packet delay between the AN node and the UE and the packet delay between the AN node and the UPF.

11. The method according to claim 1 , wherein the AF request is a request for a subscription to a packet delay report.

12. A method comprising:

receiving, by a policy control function (PCF) from an application function (AF), a request for a subscription to a packet delay report; and

sending, by the PCF to a session management function (SMF), a policy associated with the request, wherein the policy indicates the SMF to report a packet delay and how often to report the packet delay.

13. The method according to claim 12 , wherein the method further comprises:

receiving, by the PCF from the SMF, a report associated with both a packet delay between an access network (AN) node and a user equipment (UE) and a packet delay between the AN node and a user plane function (UPF); and

sending, by the PCF to the AF, the report.

14. The method according to claim 12 , wherein the policy further indicates the SMF to report the packet delay to one of the PCF and an application function (AF).

15. The method according to claim 12 , wherein the packet delay to be reported as indicated is an end-to-end packet delay.

16. The method according to claim 12 , wherein the packet delay includes one or more of: an uplink packet delay and a downlink packet delay.

17. The method according to claim 12 , wherein the policy further indicates to periodically report the packet delay.

18. The method according to claim 12 , wherein the policy further indicates to report the packet delay when the packet delay exceeds a threshold.

19. The method according to claim 12 , wherein the policy further indicates to report the packet delay when the PDU session is released.

20. The method according to claim 12 , wherein the policy is sent by the PCF during a procedure of PDU session establishment.

21. The method according to claim 12 , wherein the policy is sent by the PCF during a modification procedure associated with a protocol data unit (PDU) session.

22. An apparatus comprising one or more processors coupled with a non-transitory computer-readable media storing instructions, that when executed by the one or more processors, cause the one or more processors to perform a method including:

receiving, from a policy control function (PCF), a policy associated with an application function (AF) request, wherein the policy indicates the apparatus to report a packet delay;

according to the policy, requesting an access network (AN) node to report a packet delay between the AN node and a user equipment (UE);

according to the policy, requesting a user plane function (UPF) to report a packet delay between the AN node and the UPF;

receiving one or more indications of the packet delay between the AN node and the UE and the packet delay between the AN node and the UPF; and

sending to the AF a report associated with both the packet delay between the AN node and the UE and the packet delay between the AN node and the UPF.

23. An apparatus comprising one or more processors coupled with a non-transitory computer-readable media storing instructions, that when executed by the one or more processors, cause the one or more processors to perform a method including:

receiving, from an application function (AF), a request for a subscription to a packet delay report; and

sending to a session management function (SMF) a policy associated with the request, wherein the policy indicates the SMF to report a packet delay and how often to report the packet delay.

24. A non-transitory computer-readable media storing instructions, that when executed by one or more processors, cause the one or more processors to perform a method including:

receiving, from a policy control function (PCF), a policy associated with an application function (AF) request, wherein the policy indicates an apparatus associated with the one or more processors to report a packet delay;

according to the policy, requesting an access network (AN) node to report a packet delay between the AN node and a user equipment (UE);

according to the policy, requesting a user plane function (UPF) to report a packet delay between the AN node and the UPF;

receiving one or more indications of the packet delay between the AN node and the UE and the packet delay between the AN node and the UPF; and

sending to the AF a report associated with both the packet delay between the AN node and the UE and the packet delay between the AN node and the UPF.

25. A non-transitory computer-readable media storing instructions, that when executed by one or more processors, cause the one or more processors to perform a method including:

receiving, from an application function (AF), a request for a subscription to a packet delay report; and

sending to a session management function (SMF) a policy associated with the request, wherein the policy indicates the SMF to report a packet delay and how often to report the packet delay.