Patent ID: 8665838

Claim:
A method of performing a random access procedure by a terminal in wireless communication system, the method comprising: receiving, at the terminal, a command for starting a time alignment timer that is used to control how long the terminal is considered uplink time aligned; determining, at the terminal, whether a random access preamble to be used by the terminal in the random access procedure was not selected by the terminal; and starting or restarting the time alignment timer if it is determined that the random access preamble was not selected by the terminal, wherein the received command is ignored if it is determined that the random access preamble was selected by the terminal and if the time alignment timer is running, wherein the random access procedure is a non-contention based random access procedure if the random access preamble was not selected by the terminal, and wherein the random access procedure is a contention based random access procedure if the random access preamble was selected by the terminal.