SELECTING A USER PLANE FUNCTION (UPF) ENTITY AT A POLICY CONTROL FUNCTION (PCF) ENTITY BASED ON TERMINAL LOCATION CHANGE INFORMATION PROVIDED FROM A SESSION MANAGEMENT FUNCTION (SMF) ENTITY

摘要

Methods, a PCF entity and a SMF entity are provided for steering a protocol data unit (PDU) session associated with traffic routed to a selected user plane function (UPF).;The method includes receiving, from an application function, AF, entity, a first message including information for selecting a user plan function, UPF, entity for traffic routing of a terminal and information on a spatial condition associated with a location of the terminal; transmitting, to a session management function, SMF, entity, a second message to subscriber to receive information associated with the location of the terminal indicating that the terminal entered or left a specific area, the specific area being determined by the PCF entity based on the spatial condition, wherein the second message comprises information on the specific area; receiving, from the SMF entity, a third message including the information associated with the location of the terminal; and transmitting, to the SMF entity, a fourth message based on the information associated with the location of the terminal included in the third message, the fourth message including the information for selecting the UPF entity for traffic routing of the terminal.