Method and device for synchronizing ue policy between network and ue in wireless communication system

A policy control function (PCF) entity in a wireless communication system, the PCF entity comprising:

• a transceiver;
• and
• a controller coupled to the transceiver,
• wherein the controller is configured to:
• receive, from an access and mobility management function (AMF) entity, a first message comprising information requesting establishment of a user equipment (UE) policy association with a UE;
• receive, from a user data repository (UDR) entity, a second message comprising information related to a first UE policy;
• based on the first message and the second message, identify whether re-synchronization of UE policy information is required;
• in case that a UE policy container is not included in the information requesting establishment of the UE policy association;
• and
• based on identification of the re-synchronize, identify a second UE policy different from the first UE policy.

A method performed by a user equipment (UE) in a wireless communication system, the method comprising:

• receiving, from a policy control function (PCF) entity via an access and mobility management (AMF) entity, information related to a second UE policy identified by the PCF entity;
• based on an indicator indicating re-synchronization, included in the information related to the second UE policy, identifying whether to modify or delete information related to a first UE policy;
• and
• transmitting a result of re-synchronization of UE policy information to the PCF entity via the AMF entity.

A user equipment (UE) in a wireless communication system, the UE comprising:

• a transceiver;
• and
• a controller coupled to the transceiver,
• wherein the controller is configured to:
• receive, from a policy control function (PCF) entity via an access and mobility management (AMF) entity, information related to a second UE policy identified by the PCF entity;
• based on an indicator indicating re-synchronization, included in the information related to the second UE policy, identify whether to modify or delete information related to a first UE policy;
• and
• transmit a result of re-synchronization of UE policy information to the PCF entity via the AMF entity.