Section: 5.2.5.2 Npcf_AMPolicyControl service 5.2.5.2.1 General
Content: Service description: NF Service Consumer, e.g. AMF, can create and manage an AM Policy Association in the PCF through which the NF Service Consumer receives access and mobility related policy information for a UE identified by a SUPI. As part of this service, the PCF may provide the NF Service Consumer, e.g. AMF, with AM policy information for a SUPI that may contain: - Access and mobility related policy information as defined in clause 6.5 of TS 23.503[ Policy and charging control framework for the 5G System (5GS); Stage 2 ]  [20]. In the case of roaming, this information is provided by V-PCF; - Policy Control Request Trigger of AM Policy Association as defined in clause 6.1.2.5 of TS 23.503[ Policy and charging control framework for the 5G System (5GS); Stage 2 ]  [20]. In the case of roaming, the V-PCF may subscribe to AMF. At Npcf_AMPolicyControl_Create, the NF Service Consumer, e.g. AMF requests the creation of a corresponding AM Policy Association with the PCF (Npcf_AMPolicyControl_Create) and provides relevant parameters about the UE context to the PCF. When the PCF has created the AM Policy Association, the PCF may provide access and mobility related policy information in the response. When a Policy Control Request Trigger condition is met the NF Service Consumer, e.g. AMF requests the update (Npcf_AMPolicyControl_Update) of the AM Policy Association by providing information on the condition(s) that have been met as defined in clause 6.1.2.5 of TS 23.503[ Policy and charging control framework for the 5G System (5GS); Stage 2 ]  [20]. The PCF may provide updated access and mobility related policy information to the NF Service Consumer in the response. The PCF may at any time provide updated access and mobility related policy information (Npcf_AMPolicyControl_UpdateNotify); At UE deregistration the NF Service Consumer, e.g. AMF requests the deletion of the corresponding AM Policy Association (Npcf_AMPolicyControl_Delete).