USER EQUIPMENT, COMMUNICATION METHOD OF USER EQUIPMENT, BASE STATION DEVICE AND COMMUNICATION METHOD OF BASE STATION DEVICE

摘要

PROBLEM TO BE SOLVED: To provide a communication method for transmitting a sounding reference signal.SOLUTION: There is provided a communication method of user equipment of a mobile communication system in which a base station device schedules a physical uplink sharing channel of an uplink component carrier by using a downlink control information format. The method includes: receiving from the base station device the downlink control information including first information instructing transmission of a sounding reference signal and second information representing the uplink component carrier such that the physical uplink sharing channel is scheduled with the downlink control information format; and transmitting the sounding reference signal to the base station with the uplink component carrier represented by the second information when the first information is detected.