Terminal apparatus, base station apparatus, and communication method
A terminal apparatus capable of efficiently performing uplink and/or downlink communication is provided. With respect to communication related to transport blocks and code block groups, in a case that a PDSCH and/or a PUSCH is scheduled by a PDCCH detected in a common search space CSS, an operation applied to a transmission process includes a prescribed operation regardless of a prescribed condition and first configuration information. In a case that the PDSCH and/or the PUSCH is scheduled by the PDCCH detected in a UE-specific search space USS, the operation applied to the transmission process is provided, based at least on the prescribed condition and/or the first configuration information.
1. A terminal device comprising:
a receiver configured to:
receive a first Physical Downlink Shared Channel (PDSCH) scheduled by a first Downlink Control Information (DCI) format transmitted in a first Physical Downlink Control Channel (PDCCH) in a UE specific search space,
receive a second PDSCH scheduled by a second DCI format transmitted in a second PDCCH in a common search space, and
receive a first configuration including at least the maximum number of Code Block Groups (CBG) included in a first transport block in the first PDSCH or in a second transport block in the second PDSCH; and
a transmitter configured to transmit a first Hybrid Automatic Repeat Request Acknowledgement (HARQ-ACK) for the first transport block in the first PDSCH and a second HARQ-ACK for the second transport block in the second PDSCH, wherein:
the first DCI format includes information indicating which code block groups are transmitted, each of the code block groups including one or more code blocks, the first HARQ-ACK includes HARQ-ACK for each CBG included in the first transport block,
the second DCI format does not include information indicating which CBGs are transmitted,
in a case where the second transport block in the second PDSCH is a retransmission of the first transport block in the first PDSCH, the second HARQ-ACK includes HARQ-ACK for each CBG included in the second transport block, and
in a case where the second transport block in the second PDSCH is not a retransmission of the first transport block in the first PDSCH, the second HARQ-ACK includes HARQ-ACK for the second transport block.
2. A base station device comprising:
a transmitter configured to:
transmit a first Physical Downlink Shared Channel (PDSCH) scheduled by a first Downlink Control Information (DCI) format transmitted in a first Physical Downlink Control Channel (PDCCH) in a UE specific search space,
transmit a second PDSCH scheduled by a second DCI format transmitted in a second PDCCH in a common search space, and
transmit a first configuration including at least the maximum number of Code Block Groups (CBG) included in a first transport block in the first PDSCH or in a second transport block in the second PDSCH; and
a receiver configured to receive a first Hybrid Automatic Repeat Request Acknowledgement (HARQ-ACK) for the first transport block in the first PDSCH and a second HARQ-ACK for the second transport block in the second PDSCH, wherein:
the first DCI format includes information indicating which code block groups are transmitted, each of the code block groups including one or more code blocks, the first HARQ-ACK includes HARQ-ACK for each CBG included in the first transport block,
the second DCI format does not include information indicating which CBGs are transmitted,
in a case where the second transport block in the second PDSCH is a retransmission of the first transport block in the first PDSCH, the second HARQ-ACK includes HARQ-ACK for each CBG included in the second transport block, and
in a case where the second transport block in the second PDSCH is not a retransmission of the first transport block in the first PDSCH, the second HARQ-ACK includes HARQ-ACK for the second transport block.
3. A communication method used for a terminal device, the communication method comprising:
receiving a first Physical Downlink Shared Channel (PDSCH) scheduled by a first Downlink Control Information (DCI) format transmitted in a first Physical Downlink Control Channel (PDCCH) in a UE specific search space;
receiving a second PDSCH scheduled by a second DCI format transmitted in a second PDCCH in a common search space;
receiving a first configuration including at least the maximum number of Code Block Groups (CBG) included in a first transport block in the first PDSCH or in a second transport block in the second PDSCH; and
transmitting a first Hybrid Automatic Repeat Request Acknowledgement (HARQ-ACK) for the first transport block in the first PDSCH and a second HARQ-ACK for the second transport block in the second PDSCH, wherein:
the first DCI format includes information indicating which code block groups are transmitted, each of the code block groups including one or more code blocks, the first HARQ-ACK includes HARQ-ACK for each CBG included in the first transport block,
the second DCI format does not include information indicating which CBGs are transmitted,
in a case where the second transport block in the second PDSCH is a retransmission of the first transport block in the first PDSCH, the second HARQ-ACK includes HARQ-ACK for each CBG included in the second transport block, and
in a case where the second transport block in the second PDSCH is not a retransmission of the first transport block in the first PDSCH, the second HARQ-ACK includes HARQ-ACK for the second transport block.
4. A communication method used for a base station device, the communication method comprising:
transmitting a first Physical Downlink Shared Channel (PDSCH) scheduled by a first Downlink Control Information (DCI) format transmitted in a first Physical Downlink Control Channel (PDCCH) in a UE specific search space,
transmitting a second PDSCH scheduled by a second DCI format transmitted in a second PDCCH in a common search space;
transmitting a first configuration including at least the maximum number of Code Block Groups (CBG) included in a first transport block in the first PDSCH or in a second transport block in the second PDSCH; and
receiving a first Hybrid Automatic Repeat Request Acknowledgement (HARQ-ACK) for the first transport block in the first PDSCH and a second HARQ-ACK for the second transport block in the second PDSCH, wherein:
the first DCI format includes information indicating which code block groups are transmitted, each of the code block groups including one or more code blocks, the first HARQ-ACK includes HARQ-ACK for each CBG included in the first transport block,
the second DCI format does not include information indicating which CBGs are transmitted,
in a case where the second transport block in the second PDSCH is a retransmission of the first transport block in the first PDSCH, the second HARQ-ACK includes HARQ-ACK for each CBG included in the second transport block, and
in a case where the second transport block in the second PDSCH is not a retransmission of the first transport block in the first PDSCH, the second HARQ-ACK includes HARQ-ACK for the second transport block.