# US 2022/0045893 A1 · Terminal apparatus, base station apparatus, and communication method > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2022/0045893 A1 - Document ID: US20220045893A1 - Status: Published application - Kind: A1 - Application number: 17/416,184 - Filed: 2019-12-24 - Published: 2022-02-10 - Earliest claimed: 2018-12-26 - Assignees: Sharp Kabushiki Kaisha; FG Innovation Company Limited - Applicants: Sharp Kabushiki Kaisha; FG Innovation Company Limited - Inventors: RYOTA YAMADA; YASUHIRO HAMAGUCHI - Web page: https://patentgrep.com/patent/US20220045893A1 ## CPC - H04L 27/2613: {Structure of the reference signals} - H04L 27/26136: {Pilot sequence conveying additional information} - H04L 1/08: by repeating transmission, e.g. Verdan system {(H04L1/1858 and H04L1/189 take precedence)} - H04L 1/1819: {with retransmission of additional or different redundancy} - H04L 1/1896: {ARQ related signaling} - H04L 5/0035: {Resource allocation in a cooperative multipoint environment} - H04L 5/0044: {Allocation of payload; Allocation of data channels, e.g. PDSCH or PUSCH} - H04L 5/0051: {of dedicated pilots, i.e. pilots destined for a single user or terminal} - H04L 5/0053: {Allocation of signalling, i.e. of overhead other than pilot signals} - H04L 5/0094: {Indication of how sub-channels of the path are allocated} - H04B 7/0691: {using subgroups of transmit antennas} - H04L 1/1664: {the supervisory signal being transmitted together with payload signals; piggybacking} - H04L 1/1893: {Physical mapping arrangements (physical resource mapping in general H04L5/00)} - H04L 5/0023: {Time-frequency-space} - H04W 72/23: in the downlink direction of a wireless link, i.e. towards a terminal - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) - H04B: TRANSMISSION - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) ## Abstract Provided are a terminal apparatus, a base station apparatus, and a communication method capable of improving reliability or frequency efficiency in a case of transmission by beamforming. An apparatus includes: a receiver configured to receive a downlink shared channel including configuration information, downlink control information, and a transport block; and a signal detection unit configured to decode the downlink shared channel by using a redundancy version included in the downlink control information. The configuration information includes the number of continuous slots in which an identical transport block is transmitted repeatedly, demodulation reference signals (DMRSs) transmitted in at least two of the continuous slots are not in a relationship of Quasi-colocation (QCL), and the redundancy version is determined from slot indexes of the continuous slots and information for indicating the QCL. ## Claims ### Claim at position 1 -16. (canceled) ### Claim 17 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. ### Claim 18 (depends on 17) The terminal apparatus according to claim 17, wherein x-th slots out of the consecutive slots correspond to the one or more first predetermined slots, and y-th slots out of the consecutive slots correspond to the one or more second predetermined slots, wherein x is an odd natural number and y is an even natural number. ### Claim 19 (depends on 17) The terminal apparatus according to claim 17, wherein a first slot and a second slot out of the consecutive slots correspond to the one or more first predetermined slots, and a third slot and a fourth slot out of the consecutive slots correspond to the one or more second predetermined slots, wherein the second slot is located after the first slot, the third slot is located after the second slot, and the fourth slot is located after the third slot. ### Claim 20 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. ### Claim 21 (depends on 20) The base station apparatus according to claim 20, wherein x-th slots out of the consecutive slots correspond to the one or more first predetermined slots, and y-th slots out of the consecutive slots correspond to the one or more second predetermined slots, wherein x is an odd natural number and y is an even natural number. ### Claim 22 (depends on 20) The base station apparatus according to claim 20, wherein a first slot and a second slot out of the consecutive slots correspond to the one or more first predetermined slots, and a third slot and a fourth slot out of the consecutive slots correspond to the one or more second predetermined slots, wherein the second slot is located after the first slot, the third slot is located after the second slot, and the fourth slot is located after the third slot. ### Claim 23 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. ### Claim 24 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.