METHOD FOR PROCESSING A PACKET DATA CONVERGENCE PROTOCOL RE-ORDERING FUNCTION AT A USER EQUIPMENT IN A DUAL CONNECTIVITY SYSTEM AND DEVICE THEREFOR

摘要

The present invention relates to a wireless communication system. More specifically, the present invention relates to a method and a device for processing a PDCP reordering function in a dual connectivity system, the method comprising: performing a PDCP (Packet Data Convergence Protocol) reordering function using a reordering timer; receiving an RRC (Radio Resource Control) reconfiguration message indicating a PDCP entity is to be associ-ated with one RLC entity; and disabling the PDCP reordering function immediately by re-setting the reordering timer if the PDCP entity is re-established according to the RRC reconfiguration message.