Abstract: This application provides a method for transmitting hybrid automatic repeat request HARQ feedback information and a communications apparatus. A terminal device receives downlink data channels. Each of the downlink data channels has a corresponding transmission parameter group, and at least two downlink data channels correspond to different transmission parameter groups. The terminal device determines a first transmission resource based on first information including the transmission parameter groups, and sends, on the first transmission resource, HARQ feedback information corresponding to the downlink data channels, so that a plurality of pieces of HARQ feedback information can be smoothly fed back. This helps improve service transmission reliability.

Abstract: This application provides a communication method and a communication apparatus. The communication method includes: receiving first DCI at a first receiving position in at least one receiving position, where the first DCI includes first information, the first information indicating time domain resource allocation, and the at least one receiving position is located in a same slot; performing transmission of a data channel, with the network device, on an ith first-type time domain resource in M first-type time domain resources, where a difference between the ith first-type time domain resource and an ith reference symbol is equal to a starting symbol of an ith time domain resource in a first time domain resource set, a length of the ith first-type time domain resource is equal to a length of the ith time domain resource in the first time domain resource set.

Abstract: Embodiments of this application provide slot format configuration method and device. According to the method, a network device determines a slot format index for performing uplink-downlink transmission with a terminal device. The slot format index corresponds to a row in a slot format information table, and each row in the slot format information table includes positions of uplink symbols, positions of downlink symbols, and positions of unknown symbols in a slot. The network device sends the slot format index to the terminal device. The terminal device determines a slot format for the uplink-downlink transmission from the slot format information table based on the slot format index. The uplink-downlink slot configuration method provided in the embodiments of this application may satisfy specific requirements of low-latency and high-reliability communication scenarios.

Abstract: Embodiments of this application provide a downlink control channel monitoring method and apparatus. A terminal device sends N groups of blind monitoring capability parameters to a network device. The monitoring capability parameters include: a reference value of an interval between monitoring spans, a reference value of duration of a monitoring span, and a reference value of a monitoring capability in the monitoring span. The terminal device determines K monitoring spans in a slot based on the N groups of monitoring capability parameters, and allocates a monitoring capability of the terminal device to the K monitoring spans based on the N groups of monitoring capability parameters. The terminal device may further perform blind detection on a downlink control channel in the K monitoring spans based on monitoring capabilities in the K monitoring spans.

Abstract: This application provides a feedback information determining method and a communication apparatus. The method includes: A terminal device determines N first time domain resources in a first time unit based on a periodicity of a physical downlink shared channel (PDSCH), where the N first time domain resources are used to receive the PDSCH, and N is a positive integer. The terminal device determines, based on the N first time domain resources, a hybrid automatic repeat request acknowledgement (HARQ_ACK) codebook corresponding to the first time unit, where the HARQ-ACK codebook includes feedback information corresponding to the N first time domain resources.

Abstract: A network device sends configuration information to a terminal device, where the configuration information includes a scale factor corresponding to each aggregation level in a first aggregation level set; the network device sends DCI in a first DCI format to the terminal device, where an aggregation level corresponding to the DCI in the first DCI format is an aggregation level in the first aggregation level set. The terminal device receives the configuration information, determines, based on the scale factor corresponding to each aggregation level in the first aggregation level set, a quantity of candidate PDCCHs corresponding to each aggregation level in the first aggregation level set; the terminal device receives the DCI in the first DCI format based on the quantity of candidate PDCCHs corresponding to each aggregation level in the first aggregation level set.

Abstract: In a control information sending method, a network device sends first physical layer control information to a first terminal device, where the first physical layer control information indicates a first index to the first terminal device, and instructs the first terminal device to monitor second physical layer control information within a first time period. The network device sends the second physical layer control information to at least one terminal device within the first time period, where the second physical layer control information includes at least one control information field, the at least one control information field includes a first control information field, and the first control information field instructs the first terminal device to receive or send data, or the first control information field instructs the first terminal device to receive or send data or not to receive or send data.

Abstract: This application provides a communication method and a communication apparatus. A terminal device receives indication information sent by a network device by using higher layer signaling, receives, based on the indication information, a downlink data channel that is sent by the network device and that carries control information, and sends an uplink channel to the network device based on the control information. In this process, a step in which the network device sends a downlink PDCCH to the terminal device and a step in which the network device sends an uplink PDCCH to the terminal device are omitted, and closed-loop service communication is implemented through only one downlink data channel and one uplink channel. There are few signaling-related steps, thereby greatly ensuring service reliability and reducing a latency.

Abstract: This application discloses a channel quality feedback method and apparatus, and the channel quality feedback method includes the following steps: determining, by a network device, a channel quality indicator set of a terminal device, where the channel quality indicator set includes at least one channel quality indicator value, and the channel quality indicator value is used to indicate channel quality; and sending, by the network device, the channel quality indicator set to the terminal device.

Abstract: This application provides a wireless communication method and a communications apparatus, to implement semi-static codebook feedback at a sub-slot granularity. The method includes: determining a candidate opportunity set, where a quantity of candidate opportunities included in the candidate opportunity set is a maximum quantity of non-overlapping data transmission opportunities included in a data transmission opportunity set, the data transmission opportunity set corresponds to a first set, the first set includes one or more downlink sub-time units, and the one or more downlink sub-time units correspond to a target uplink sub-time unit; and sending or receiving feedback information in the target uplink sub-time unit, where the feedback information includes a hybrid automatic repeat request acknowledgement HARQ-ACK codebook corresponding to the candidate opportunity set.

Abstract: This application provides a method for multiplexing uplink control information, and relates to the wireless communications field. When a resource of a first uplink control channel that carries first HARQ-ACK information does not overlap a resource of a second uplink control channel that carries second HARQ-ACK information in time domain, but a resource of a third uplink control channel that carries an SR/CSI overlaps both the resource of the first uplink control channel and the resource of the second uplink control channel in time domain, a base station and UE determine, based on a format of the first uplink control channel, a format of the second uplink control channel, and a format of the third uplink control channel, that third HARQ-ACK information and first UCI are multiplexed for transmission, where the third HARQ-ACK information is the first HARQ-ACK information or the second HARQ-ACK information.

Abstract: Embodiments of the present disclosure provide a data transmission method. The method includes: sending, by a network device, first indication information, where the first indication information includes N bits, the N bits are corresponding to M time units, the M time units are corresponding to at least one time length, a value of each bit is used to indicate whether a corresponding time unit is used to transmit data of a terminal device, M is an integer greater than or equal to 1, and N is an integer greater than or equal to 1; and sending, by the network device, downlink data in a time unit that is used to transmit the data of the terminal device, where the time unit is indicated by the N bits. Therefore, a unified time domain resource indication manner can be used in different scenarios to reduce complexity of a signaling design.

Abstract: In a data receiving method, a terminal receives first indication information, where the first indication information indicates a target frequency domain position. The terminal determines a first time-frequency resource based on a time domain position of a control resource set and the target frequency domain position, where a frequency domain position of the first time-frequency resource is the same as the target frequency domain position. The terminal receives data on a target time-frequency resource, where the target time-frequency resource includes a second time-frequency resource and a part of resources in the first time-frequency resource; or the target time-frequency resource includes a second time-frequency resource but does not include the first time-frequency resource, where N is a positive integer.

Abstract: This application provides a data transmission method and apparatus. The method includes coding, by a terminal device, a first transport block to obtain a first coded transport block, where the first transport block includes first data; coding, by the terminal device, indication information to obtain coded indication information, where the indication information is used to indicate whether the terminal device sends a first buffer status report BSR when the terminal device sends the first data, and the first BSR indicates a data amount of to-be-transmitted data currently buffered in a buffer of the terminal device; and sending, by the terminal device, the first coded transport block and the coded indication information to a network device. According to the data transmission method and apparatus provided in embodiments of this application, the network device can directly learn whether the terminal device sends a BSR, so as to reduce a communication delay.

Abstract: A method may include: dividing, by a sending device into k code blocks CBs, a TB into which a cyclic redundancy check bit is loaded; then separately performing channel coding on the k CBs, to obtain a bit sequence Sj, where j=1, 2, . . . , and k, and a set S={S1, S2, . . . , Sk}; and mapping, by the sending device, some or all bit sequences in all elements in S to transmission resources in N basic transmission time units, where some or all bit sequences in the Sj are mapped to transmission resources in Mj basic transmission time units, and a last bit in the Sj mapped to an mth basic transmission time unit in the Mj basic transmission time units and a first bit in the Sj mapped to an (m+1)th basic transmission time unit are contiguous in the Sj.

Abstract: This application discloses that a terminal device determines at least one target time parameter set based on N time parameter sets, where time unit lengths corresponding to at least two of the N time parameter sets are different; determines M target times based on a first time and the at least one target time parameter set, generates a codebook based on response information corresponding to downlink information received at at least one of the M target times, and sends the codebook to a network device at the first time. Correspondingly, the network device determines, based on the response information included in the codebook, whether the downlink information corresponding to the response information is successfully transmitted. Therefore, when the time unit lengths corresponding to the at least two of the N time parameter sets are different, the network device and the terminal device have a consistent understanding of the codebook.

Abstract: This application provides a feedback information sending method, including: receiving, by a terminal device, in a first time unit, a first reference signal sent by a network device, where the first reference signal corresponds to first downlink control information, and the first downlink control information is used to schedule a first information block; determining, by the terminal device based on the first reference signal, that receiving of the first downlink control information in the first time unit fails; and sending, by the terminal device, on a first resource corresponding to the first time unit, first feedback information to the network device, where the first feedback information indicates that the receiving of the first downlink control information fails.

Abstract: This application provides a data transmission method and a communications apparatus. The method includes: first determining, based on a first time domain resource, M mini-slot-level second time domain resources that do not cross a slot boundary; and then performing repeated mini-slot-level data transmission on the M second time domain resources.

Abstract: A data transmission method, including receiving, by a terminal device in a downlink control part, first downlink control information and a first downlink reference signal that are sent by a network device, receiving, by the terminal device in a first downlink data part according to the first downlink control information, first data sent by the network device, generating, by the terminal device, feedback information based on the first downlink reference signal and the first data, sending, by the terminal device, the feedback information to the network device in an uplink feedback part, and receiving, by the terminal device in a second downlink data part according to the first downlink control information, second data sent by the network device, where the downlink control part, the first downlink data part, the uplink feedback part, and the second downlink data part constitute a first time unit.

Abstract: This application provides a communication method, including: A terminal device determines a first time unit for receiving downlink data, determines, based on k1 corresponding to the downlink data, a second time unit in which feedback information corresponding to the downlink data is located, where a length of the first time unit is greater than or equal to a length of the second time unit, k1 is a nonnegative integer, k1 represents a quantity of second time units from the first time unit to the second time unit, and the length of the second time unit is less than one slot slot, and sends, in the second time unit, a feedback codebook to the network device, where the feedback codebook includes the feedback information corresponding to the downlink data. In this application, a transmission latency of downlink data is reduced.