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

A base station apparatus for communicating with a terminal apparatus by using at least two serving cells including a primary cell of Frequency Division Duplex (FDD) and a secondary cell of Time Division Duplex (TDD), the base station apparatus comprising:

• a transmitter configured to transmit a Physical Downlink Control Channel (PDCCH) scrambled by a Cell-Radio Network Temporary Identifier (C-RNTI) and one or two transport blocks scheduled by the PDCCH in the primary cell;
• and
• a receiver configured to:
• receive a Hybrid Automatic Repeat Request-Acknowledgement (HARQ-ACK) for the one or two transport blocks by using Physical Uplink Control Channel (PUCCH) format 1b with channel selection for FDD,
• select a third first transmission method in a case that a scheduling request (SR) is a positive SR, the one or two transport blocks are transmitted in the primary cell in a subframe i, the HARQ-ACK and the SR are received in subframe i+kpp, and a subframe j in the secondary cell does not correspond to any of a plurality of first prescribed subframes,
• select a second transmission method in a case that the SR is the positive SR, the one or two transport blocks are transmitted in the primary cell in the subframe i, the HARQ-ACK and the SR are received in the subframe i+kpp, and the subframe j in the secondary cell corresponds to one of the plurality of first prescribed subframes, and
• receive the HARQ-ACK in a PUCCH resource for the SR based on a transmission method selected, wherein:
• the first transmission method is a method for receiving the HARQ-ACK and the SR with PUCCH format 1b with channel selection for FDD,
• the second transmission method is a method for receiving the HARQ-ACK and the SR with PUCCH format 1a or 1b for FDD,
• the subframe j is given by i−1 in a case that a higher layer parameter shortProcessingTime for the primary cell is configured, a higher layer parameter shortProcessingTime for the secondary cell is not configured, and the PDCCH is transmitted in a user equipment-specific search space (USS),
• the subframe j is given by i+1 in a case that the higher layer parameter shortProcessingTime for the primary cell is configured, the higher layer parameter shortProcessingTime for the secondary cell is configured, and the PDCCH is transmitted in a common search space (CSS),
• kpp is 4 if the higher layer parameter shortProcessingTime for the primary cell is not configured,
• kpp is 3 if the higher layer parameter shortProcessingTime for the primary cell is configured, and
• the plurality of first prescribed subframes includes uplink subframes, special subframes with special subframe configuration 0 or 5 when normal Cyclic Prefix (CP) is configured for a downlink, and special subframes with special subframe configuration 0 or 4 when extended CP is configured for the downlink.

A communication method for a terminal apparatus for communicating with a base station apparatus by using at least two serving cells including a primary cell of Frequency Division Duplex (FDD) and a secondary cell of Time Division Duplex (TDD), the communication method comprising:

• receiving a Physical Downlink Control Channel (PDCCH) scrambled by a Cell-Radio Network Temporary Identifier (C-RNTI) and one or two transport blocks scheduled by the PDCCH in the primary cell;
• transmit a Hybrid Automatic Repeat Request-Acknowledgement (HARQ-ACK) for the one or two transport blocks by using Physical Uplink Control Channel (PUCCH) format 1b with channel selection for FDD;
• selecting a first transmission method in a case that a scheduling request (SR) is a positive SR, the one or two transport blocks are received in the primary cell in a subframe i, the HARQ-ACK and the SR are transmitted in subframe i+kpp, and a subframe j in the secondary cell does not correspond to any of a plurality of first prescribed subframes;
• selecting a second transmission method in a case that the SR is the positive SR, the one or two transport blocks are received in the primary cell in the subframe i, the HARQ-ACK and the SR are transmitted in the subframe i+kpp, and the subframe j in the secondary cell corresponds to one of the plurality of first prescribed subframes;
• and
• transmitting the HARQ-ACK in a PUCCH resource for the SR by using a transmission method selected, wherein
• the first transmission method is a method for transmitting the HARQ-ACK and the SR with PUCCH format 1b with channel selection for FDD,
• the second transmission method is a method for transmitting the HARQ-ACK and the SR with PUCCH format 1a or 1b for FDD,
• the subframe j is given by i−1 in a case that a higher layer parameter shortProcessingTime for the primary cell is configured, a higher layer parameter shortProcessingTime for the secondary cell is not configured, and the PDCCH is received in a user equipment-specific search space (USS),
• the subframe j is given by i+1 in a case that the higher layer parameter shortProcessingTime for the primary cell is configured, the higher layer parameter shortProcessingTime for the secondary cell is configured, and the PDCCH is received in a common search space (CSS),
• kpp is 4 if the higher layer parameter shortProcessingTime for the primary cell is not configured,
• kpp is 3 if the higher layer parameter shortProcessingTime for the primary cell is configured, and
• the plurality of first prescribed subframes includes uplink subframes, special subframes with special subframe configuration 0 or 5 when normal Cyclic Prefix (CP) is configured for a downlink, and special subframes with special subframe configuration 0 or 4 when extended CP is configured for the downlink.

A communication method for a base station apparatus for communicating with a terminal apparatus by using at least two serving cells including a primary cell of Frequency Division Duplex (FDD) and a secondary cell of Time Division Duplex (TDD), the communication method comprising:

• transmitting a Physical Downlink Control Channel (PDCCH) scrambled by a Cell-Radio Network Temporary Identifier (C-RNTI) and one or two transport blocks scheduled by the PDCCH in the primary cell;
• receiving a Hybrid Automatic Repeat Request-Acknowledgement (HARQ-ACK) for the one or two transport blocks by using Physical Uplink Control Channel (PUCCH) format 1b with channel selection for FDD;
• selecting a first transmission method in a case that a scheduling request (SR) is a positive SR, the one or two transport blocks are transmitted in the primary cell in a subframe i, the HARQ-ACK and the SR are received in subframe i+kpp, and a subframe j in the secondary cell does not correspond to any of plurality of first prescribed subframes;
• selecting a second transmission method in a case that the SR is the positive SR, the one or two transport blocks are transmitted in the primary cell in the subframe i, the HARQ-ACK and the SR are received in subframe i+kpp, and the subframe j in the secondary cell corresponds to one of the plurality of first prescribed subframes;
• and
• receiving the HARQ-ACK in a PUCCH resource for the SR based on a transmission method selected, wherein
• the first transmission method is a method for receiving the HARQ-ACK and the SR with PUCCH format 1b with channel selection for FDD,
• the second transmission method is a method for receiving the HARQ-ACK and the SR with PUCCH format 1a or 1b for FDD,
• the subframe j is given by i−1 in a case that a higher layer parameter shortProcessingTime for the primary cell is configured, a higher layer parameter shortProcessingTime for the secondary cell is not configured, and the PDCCH is transmitted in a user equipment-specific search space (USS),
• the subframe j is given by i+1 in a case that the higher layer parameter shortProcessingTime for the primary cell is configured, the higher layer parameter shortProcessingTime for the secondary cell is configured, and the PDCCH is transmitted in a common search space (CSS),
• kpp is 4 if the higher layer parameter shortProcessingTime for the primary cell is not configured,
• kpp is 3 if the higher layer parameter shortProcessingTime for the primary cell is configured, and
• the plurality of first prescribed subframes includes uplink subframes, special subframes with special subframe configuration 0 or 5 when normal Cyclic Prefix (CP) is configured for a downlink, and special subframes with special subframe configuration 0 or 4 when extended CP is configured for the downlink.