Terminal device, base station apparatus, communication method, and integrated circuit
AssigneeSharp Kabushiki Kaisha
InventorsNaoki Kusashima, Toshizo Nogami, Wataru Ouchi, Kazuyuki Shimezawa, Kimihiko Imamura
Life of this patent
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Abstract
There is provided a terminal device which communicates with a base station apparatus. The terminal device includes a reception unit that decodes a downlink control channel (PDCCH) or an enhanced downlink control channel (EPDCCH) including a downlink control information (DCI) format. A field of a downlink assignment index (DAI) is provided in the DCI format for a TDD operation, in a case of a time division duplex (TDD) primary cell. The field of the DAI is not provided in the DCI format for the TDD operation, in a case of a frequency division duplex (FDD) primary cell.
Claims18
-56. (canceled)
-72. (canceled)
A user equipment comprising:
- a reception circuitry configured to decode a physical downlink control channel (PDCCH) or an enhanced physical downlink control channel (EPDCCH) with a downlink control information (DCI) format used for a scheduling of a physical downlink shared channel (PDSCH);
- and
- a transmission circuitry configured to transmit hybrid automatic repeat request acknowledgement (HARQ-ACK) response information corresponding to the PDSCH;
- wherein
- a downlink assignment index (DAI) field is present in the DCI format for a time division duplex (TDD) operation, for a case with a TDD primary cell, and
- the DAI field is not present in the DCI format for the TDD operation, for a case with a frequency division duplex (FDD) primary cell.
A user equipment comprising:
- a reception circuitry configured to decode a physical downlink control channel (PDCCH) or an enhanced physical downlink control channel (EPDCCH) with a downlink control information (DCI) format used for a scheduling of a physical downlink shared channel (PDSCH);
- and
- a transmission circuitry configured to transmit hybrid automatic repeal request acknowledgement (HARQ-ACK) response information corresponding to the PDSCH;
- wherein
- a downlink assignment index (DAI) field is present in the DCI format for a frequency division duplex (FDD) operation, for a case with a time division duplex (TDD) primary cell, and
- the DAI field is not present in the DCI format for the FDD operation, for a case with a FDD primary cell.
A user equipment configured to communicate with a base station apparatus, the user equipment comprising:
- a reception circuitry configured to decode a physical downlink control channel (PDCCH) or an enhanced physical downlink control channel (EPDCCH) with a downlink control information (DCI) format used for a scheduling of a physical uplink shared channel (PUSCH);
- and
- a transmission circuitry configured to transmit the PUSCH;
- wherein
- a downlink assignment index (DAI) field is present in the DCI format for a case with a time division duplex (TDD) primary cell and a frequency division duplex (FDD) operation.
A user equipment configured to communicate with a base station apparatus, the user equipment comprising:
- a reception circuitry configured to decode a physical downlink control channel (PDCCH) or an enhanced physical downlink control channel (EPDCCH) with a downlink control information (DCI) format used for a scheduling of a physical uplink shared channel (PUSCH);
- and
- a transmission circuitry configured to transmit the PUSCH;
- wherein
- a downlink assignment index (DAI) field is present in the DCI format for a case with a time division duplex (TDD) primary cell and a TDD operation with a predetermined uplink-downlink configuration and
- the DAI field is not present in the DCI format for a case with a frequency division duplex (FDD) primary cell and the TDD operation with the predetermined uplink-downlink configuration.
Dependencies are inferred from the claim text.