Provided is a wireless communication system in which a first base station apparatus and a second base station apparatus perform communication with a terminal device, in which the first base station apparatus transmits radio resource configuration information including radio bearer configuration information of the first base station apparatus or the second base station apparatus, to the terminal device, in which the terminal device receives the radio resource configuration information, in which, in a case where an RLC failure with respect to the first base station apparatus is detected, the terminal device executes a re-establishment procedure, and in which, in a case where an RLC failure with respect to the second base station apparatus is detected, the terminal device transmits to the first base station apparatus a message indicating that an RLC failure with respect to the second base station apparatus is detected, and suspends the radio bearer for the second base station apparatus.