MOBILE STATION APPARATUS, BASE STATION APPARATUS, INTEGRATED CIRCUIT, AND METHOD OF DETECTING RANDOM ACCESS PROBLEMS

摘要

A terminal device includes a transmitter that transmits a random access preamble, a higher layer processor that configures, based on a higher layer signal, a first identity corresponding to a first component carrier group and a second identity corresponding to a second component carrier group; a counter that, in a case that two or more component carriers are configured for an uplink, counts a number of transmission of the random access preamble; and a medium access control (MAC) layer processor that indicates a random access problem to an upper layer in a case that the number exceeds a maximum number of transmission of the random access preamble on a master component carrier of the first component carrier group or a master component carrier of the second component carrier group.