Mobile communication system, base station device, mobile station device, communication method, and integrated circuit

A mobile station device comprising:

• receiving circuitry configured and/or programmed to receive, from a base station device, a first parameter used for indicating simultaneous transmission of Channel State Information (CSI) and Hybrid Automatic Repeat Request-Acknowledgment (HARQ-ACK) using a first physical uplink control channel (PUCCH) format,
• transmitting circuitry configured and/or programmed to transmit based on the first parameter, to the base station device, CSI and HARQ-ACK on a first PUCCH using the first PUCCH format, wherein
• in a case that the receiving circuitry is configured and/or programmed to receive, from the base station device, a second parameter used for indicating simultaneous transmission of CSI and HARQ-ACK using a second PUCCH format,
• the transmitting circuitry is configured and/or programmed to perform, based on the second parameter, one of a first behavior and a second behavior,
• the first behavior is to transmit, to the base station device, CSI and HARQ-ACK on a second PUCCH using the second PUCCH format, and
• the second behavior is to drop CSI and to transmit, to the base station apparatus, only HARQ-ACK on the second PUCCH using the second PUCCH format.

A base station device comprising:

• transmitting circuitry configured and/or programmed to transmit, to a mobile station device, a first parameter used for indicating simultaneous transmission of Channel State Information (CSI) and Hybrid Automatic Repeat Request-Acknowledgment (HARQ-ACK) using a first physical uplink control channel (PUCCH) format,
• receiving circuitry configured and/or programmed to receive based on the first parameter, from the mobile station device, CSI and HARQ-ACK on a first PUCCH using the first PUCCH format, wherein
• in a case that the transmitting circuitry is configured and/or programmed to transmit, to the mobile station device, a second parameter used for indicating simultaneous transmission of CSI and HARQ-ACK using a second PUCCH format,
• the receiving circuitry is configured and/or programmed to perform, based on the second parameter, one of a first behavior and a second behavior,
• the first behavior is to receive, from the mobile station device, CSI and HARQ-ACK on a second PUCCH using the second PUCCH format, and
• the second behavior is to assume that CSI is dropped and to receive, from the mobile station apparatus, only HARQ-ACK on the second PUCCH using the second PUCCH format.

A communication method of a mobile station device comprising:

• receiving, from a base station device, a first parameter used for indicating simultaneous transmission of Channel State Information (CSI) and Hybrid Automatic Repeat Request-Acknowledgment (HARQ-ACK) using a first physical uplink control channel (PUCCH) format,
• transmitting based on the first parameter, to the base station device, CSI and HARQ-ACK on a first PUCCH using the first PUCCH format, wherein
• in a case that a second parameter used for indicating simultaneous transmission of CSI and HARQ-ACK using a second PUCCH format is received form the base station device,
• performing, based on the second parameter, one of a first behavior and a second behavior,
• the first behavior is to transmit, to the base station device, CSI and HARQ-ACK on a second PUCCH using the second PUCCH format, and
• the second behavior is to drop CSI and to transmit, to the base station apparatus, only HARQ-ACK on the second PUCCH using the second PUCCH format.

A communication method of a base station device comprising:

• transmitting, to a mobile station device, a first parameter used for indicating simultaneous transmission of Channel State Information (CSI) and Hybrid Automatic Repeat Request-Acknowledgment (HARQ-ACK) using a first physical uplink control channel (PUCCH) format,
• receiving based on the first parameter, from the mobile station device, CSI and HARQ-ACK on a first PUCCH using the first PUCCH format, wherein
• in a case that a second parameter used for indicating simultaneous transmission of CSI and HARQ-ACK using a second PUCCH format is transmitted to the base station device,
• performing, based on the second parameter, one of a first behavior and a second behavior,
• the first behavior is to receive, from the mobile station device, CSI and HARQ-ACK on a second PUCCH using the second PUCCH format, and
• the second behavior is to assume that CSI is dropped and to receive, from the mobile station apparatus, only HARQ-ACK on the second PUCCH using the second PUCCH format.