Apparatus and method for user traffic control based on request of application service function in wireless communication system

An operation method of a User Plane Function (UPF) performing header handling in a wireless communication system, the method comprising:

• receiving a header handling control rule from a Session Management Function (SMF) through an N4 interface;
• performing one or more header handling operations of header detection, header removal, header replacement, and header insertion on user traffic according to the header handling control rule;
• and
• transmitting processing results of the header handling operations to one or more of the SMF, a Network Exposure Function (NEF), or an Application Function (AF) through a Nupf_EventExposure service interface.

Apparatus for a User Plane Function (UPF) performing header handling in a wireless communication system, the apparatus comprising:

• a transceiver;
• and
• a processor operatively connected to the transceiver,
• wherein the processor is configured to:
• receive a header handling control rule from a Session Management Function (SMF) through an N4 interface;
• perform one or more header handling operations of header detection, header removal, header replacement, and header insertion on user traffic according to the header handling control rule;
• and
• transmit processing results of the header handling operations to one or more of the SMF, a Network Exposure Function (NEF), or an Application Function (AF) through a Nupf_EventExposure service interface.