METHOD FOR MAINTAINING UPLINK TIMING SYNCHRONIZATION IN A MOBILE COMMUNICATION SYSTEM AND USER EQUIPMENT APPARATUS FOR THE SAME

摘要

Disclosed is a method for maintaining uplink timing synchronization by a User Equipment (UE) in a mobile communication system,without uplink transmission of a preamble from a UE or without transmission of uplink timing difference information from an Evolved Node B (E-NB) to solve the inefficient use problem of radio resources, occurring due to periodic transmission of uplink signaling and downlink signaling during maintenance of the uplink timing synchronization, and a UE apparatus for the same.