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

摘要

A method of detecting random access problems in a mobile station apparatus which uses multiple component carriers to perform random access. To achieve this, the mobile station apparatus, which is in a mobile communication system comprised of a base station apparatus and mobile station apparatuses, uses one random access channel transmission counter to detect random access problems in the plurality of component carriers.