A.15 Policy association related measurements

28.5523GPP5G performance measurementsManagement and orchestrationRelease 18TS

To ensure the UE properly use the services provided by 5GS, the UE needs to be associated with a set of policies. The policies are categorized into AM policy, SM policy and UE policy and these kinds of policies are provisioned by PCF.

The AM policy association needs to be established in case the UE initially registers to the network or the UE needs the AMF re-allocation. The AM policy association needs to be updated when the policy control request trigger is met or the AMF is relocated due to the UE mobility and the old PCF is selected (see clause 4.2 in TS 29.507[39]).

The SM policy association needs to be established when the UE requests a PDU Session Establishment. The SM policy association needs to be updated when Policy Control Request Trigger condition is met (see clause 4.2 in TS 29.512[40]).

The UE policy association needs to be established in the following scenarios:

1. UE initial registration with the network when a UE Policy Container is received.

2. The AMF relocation with PCF change in handover procedure and registration procedure.

3. UE registration with 5GS when the UE moves from EPS to 5GS and there is no existing UE Policy Association between AMF and PCF for this UE.

The policy association establishment is the essential steps allowing the UE to be served by the 5GS under the designed policies, therefore it needs to be monitored.