Terminal apparatus, base station apparatus, and communication method

A terminal apparatus configured to communicate with a base station apparatus, the terminal apparatus comprising:

• radio reception circuitry configured to receive higher-layer configuration information, a physical downlink control channel (PDCCH) with downlink control information (DCI), and a physical downlink shared channel (PDSCH) that includes a transport block;
• and
• signal detection circuitry configured to acquire the transport block by decoding the PDSCH using a redundancy version, wherein
• the higher-layer configuration information includes a quantity of consecutive slots in which the PDSCH is repeatedly transmitted,
• the DCI includes the redundancy version, a first transmission configuration indication (TCI) and a second TCI,
• the redundancy version included in the DCI indicates a start position to select a bit in an error correction coding,
• the first TCI indicates first quasi-colocation (QCL) information between a demodulation reference signal (DMRS) and a first predetermined downlink signal, and the second TCI indicates second QCL information between the DMRS and a second predetermined downlink signal, the DMRS being used for demodulating the PDSCH,
• the radio reception circuitry is configured to:
• receive the PDSCH based on the first TCI in one or more first predetermined slots out of the consecutive slots, and
• receive the PDSCH based on the second TCI in one or more second predetermined slots out of the consecutive slots,
• a first redundancy version used for decoding the PDSCH in slot N out of the one or more first predetermined slots is determined based on the redundancy version included in the DCI, N, and a first slot index for the slot N,
• a second redundancy version used for decoding the PDSCH in slot M out of the one or more second predetermined slots is determined based on the redundancy version included in the DCI, M, and a second slot index for the slot M,
• N and M are integer equal to or more than 0, and
• the first slot index and the second slot index indicate an order of a slot in the consecutive slots.

A base station apparatus configured to communicate with a terminal apparatus, the base station apparatus comprising:

• encoding circuitry configured to encode a transport block;
• and
• radio transmission circuitry configured to transmit higher-layer configuration information, a physical downlink control channel (PDCCH) with downlink control information (DCI), and a physical downlink shared channel (PDSCH) that includes the transport block, wherein
• the higher-layer configuration information includes a quantity of consecutive slots in which the PDSCH is repeatedly transmitted,
• the DCI includes a redundancy version, a first transmission configuration indication (TCI) and a second TCI,
• the redundancy version included in the DCI indicates a start position to select a bit in an error correction coding, and used for acquiring the transport block by decoding the PDSCH,
• the first TCI indicates first quasi-colocation (QCL) information between a demodulation reference signal (DMRS) and a first predetermined downlink signal, and the second TCI indicates second QCL information between the DMRS and a second predetermined downlink signal, the DMRS being used for demodulating the PDSCH,
• the radio transmission circuitry is configured to:
• transmit the PDSCH based on the first TCI in one or more first predetermined slots out of the consecutive slots, and
• transmit the PDSCH based on the second TCI in one or more second predetermined slots out of the consecutive slots,
• a first redundancy version used for decoding the PDSCH in slot N out of the one or more first predetermined slots is determined based on the redundancy version included in the DCI, N, and a first slot index for the slot N,
• a second redundancy version used for decoding the PDSCH in slot M out of the one or more second predetermined slots is determined based on the redundancy version included in the DCI, M, and a second slot index for the slot M,
• N and M are integer equal to or more than 0, and
• the first slot index and the second slot index indicate an order of a slot in the consecutive slots.

A communication method for a terminal apparatus configured to communicate with a base station apparatus, the communication method comprising:

• receiving higher-layer configuration information, a physical downlink control channel (PDCCH) with downlink control information (DCI), and a physical downlink shared channel (PDSCH) that includes a transport block;
• acquiring the transport block by decoding the PDSCH using a redundancy version;
• receiving the PDSCH based on a first transmission configuration indication (TCI) in one or more first predetermined slots out of consecutive slots wherein the PDSCH is repeatedly transmitted in the consecutive slots, and
• receive the PDSCH based on a second TCI in one or more second predetermined slots out of the consecutive slots, wherein
• the higher-layer configuration information includes a quantity of slots of the consecutive slots,
• the DCI includes the redundancy version, the first TCI and the second TCI,
• the redundancy version included in the DCI indicates a start position to select a bit in an error correction coding,
• the first TCI indicates first quasi-colocation (QCL) information between a demodulation reference signal (DMRS) and a first predetermined downlink signal, and the second TCI indicates second QCL information between the DMRS and a second predetermined downlink signal, the DMRS being used for demodulating the PDSCH,
• a first redundancy version used for decoding the PDSCH in slot N out of the one or more first predetermined slots is determined based on the redundancy version included in the DCI, N, and a first slot index for the slot N,
• a second redundancy version used for decoding the PDSCH in slot M out of the one or more second predetermined slots is determined based on the redundancy version included in the DCI, M, and a second slot index for the slot M,
• N and M are integer equal to or more than 0, and
• the first slot index and the second slot index indicate an order of a slot in the consecutive slots.

A communication method for a base station apparatus configured to communicate with a terminal apparatus, the communication method comprising:

• encoding a transport block;
• transmitting higher-layer configuration information, a physical downlink control channel (PDCCH) with downlink control information (DCI), and a physical downlink shared channel (PDSCH) that includes the transport block;
• transmitting the PDSCH based on a first transmission configuration indication (TCI) in one or more first predetermined slots out of consecutive slots wherein the PDSCH is repeatedly transmitted in the consecutive slots, and
• transmitting the PDSCH based on a second TCI in one or more second predetermined slots out of the consecutive slots, wherein
• the higher-layer configuration information includes a quantity of slots of the consecutive slots,
• the DCI includes a redundancy version, the first TCI, and the second TCI,
• the redundancy version indicates a start position to select a bit in an error correction coding, and used for acquiring the transport block by decoding the PDSCH,
• the first TCI indicates first quasi-colocation (QCL) information between a demodulation reference signal (DMRS) and a first predetermined downlink signal, and the second TCI indicates second QCL information between the DMRS and a second predetermined downlink signal, the DMRS being used for demodulating the PDSCH,
• a first redundancy version used for decoding the PDSCH in slot N out of the one or more first predetermined slots is determined based on the redundancy version included in the DCI, N, and a first slot index for the slot N,
• the redundancy version used for decoding the PDSCH in slot M out of the one or more second predetermined slots is determined based on the redundancy version included in the DCI, M, and a second slot index for the slot M,
• N and M are integer equal to or more than 0, and
• the first slot index and the second slot index indicate an order of a slot in the consecutive slots.