Terminal device, base station device, integrated circuit, and communication method

A base station device comprising:

• transmission circuitry configured to and/or programmed to perform a transmission of an uplink grant included in a control channel or a random access response;
• and
• reception circuitry configured to and/or programmed to perform a reception based on the uplink grant,
• wherein, the control channel includes hybrid automatic repeat request (HARQ) information, and random access response without a HARQ process identifier (ID),
• in asynchronous HARQ, a HARQ process which corresponds to the transmission is associated with a HARQ process ID which is included in the HARQ information except in a case where the uplink grant is included in the random access response, and
• for the transmission associated with the uplink grant included in the random access response, a HARQ process ID is used.

A communication method for terminal device, the communication method comprising:

• performing a reception of an uplink grant included in a control channel or a random access response;
• and
• performing a transmission based on the uplink grant;
• wherein, the control channel includes hybrid automatic repeat request (HARQ) information, and the random access reposne without a HARQ process identifier (ID),
• in asynchronous HARQ, a HARQ process which corresponds to the transmission is associated with a HARQ process ID which is included in the HARQ information except in a case where the uplink grant is included in the random access response, and
• for the transmission associated with the uplink grant included in the random access response, a HARQ process ID is used.

A communication method for base station device, the communication method comprising:

• performing a transmission of an uplink grant included in a control channel or a random access response;
• and
• performing a reception based on the uplink grant,
• wherein, the control channel includes hybrid automatic repeat request (HARQ) information, and the random access response without a HARQ process identifier (ID),
• in asynchronous HARQ, a HARQ process which corresponds to the transmission is associated with a HARQ process ID which is included in the HARQ information except in a case where the uplink grant is included in the random access response, and
• for the transmission associated with the uplink grant included in the random access response, a HARQ process ID is used.