USER TERMINAL, WIRELESS BASE STATION, WIRELESS COMMUNICATION SYSTEM, AND WIRELESS COMMUNICATION METHOD

摘要

The purpose of the present invention is to suitably perform uplink communication in an unlicensed band in a wireless communication system (LAA) that operates LTE in an unlicensed band. Provided is a user terminal comprising a control unit that controls the transmission and reception of a signal in a first frequency carrier in which Listen Before Talk (LBT) is set or in a second frequency carrier in which LBT is not set. The control unit controls so that the procedure after reception of a random access response in a random access procedure is performed in the second frequency carrier and uplink transmission is performed in the first frequency carrier after random access is established.