Abstract: A method for sending and receiving a HARQ-ACK message is provided. The method includes: A terminal device selects a first PUCCH resource from at least one first PUCCH resource set based on a first time subunit. The first time subunit is a time subunit in which the HARQ-ACK message is located. The first PUCCH resource is a PUCCH resource in the first time subunit. The at least one first PUCCH resource set is configured by a network device for the terminal device based on a time unit. The terminal device sends the HARQ-ACK message to the network device based on the first PUCCH resource.

Abstract: A data transmission method and device, the method including obtaining, by a terminal device, a first resource and a second resource, where at least one first uplink transmission opportunity is configured for the first resource, a second uplink transmission opportunity is configured for the second resource, the first uplink transmission opportunity comprises X repeated first uplink transmission resources, the second uplink transmission opportunity comprises Y repeated second uplink transmission resources, and both X and Y are each integers greater than or equal to 1, and sending, by the terminal device, uplink data to a network device using the second uplink transmission opportunity in response to sending using N closest first uplink transmission opportunities before the second uplink transmission opportunity being blocked, where N is an integer greater than or equal to 1.

Abstract: A communication method and apparatus are provided, so that a terminal device determines whether DCI obtained through monitoring is repeatedly transmitted on a PDCCH or individually transmitted on a PDCCH. A network device determines first configuration information based on a first condition, and sends the first configuration information to a first terminal device. The first configuration information includes information indicating the first terminal device to monitor a PDCCH candidate based on a span, and includes configuration information of a first PDCCH candidate and a second PDCCH candidate.

Abstract: Example communication methods and apparatus are described. One example method includes: when a terminal side device determines that first downlink control information (DCI) meets a first condition, the terminal side device uses a quantity of physical downlink control channel (PDCCH) candidates that are located in a first time unit and that are in a search space set corresponding to the first DCI as a first quantity of times of monitoring. In the first time unit, the terminal side device monitors, in the search space set corresponding to the first DCI based on the first quantity of times of monitoring, a PDCCH carrying the first DCI.

Abstract: Channel information sending methods or channel information receiving methods are provided. One example method includes that a network device configures for a terminal device Q DMRS ports used for measurement, where the Q DMRS ports used for measurement include M DMRS ports that can carry downlink data, and Q is greater than M; and selects, based on channel information of P DMRS ports that is sent by the terminal device, an appropriate DMRS port to send the downlink data, where the P DMRS ports belong to the Q DMRS ports used for measurement.

Abstract: Embodiments of this application provide a blind detection method. A terminal side device receives first indication information from a network side device, where the first indication information is used to determine at least one of N time units, a first time unit in the N time units corresponds to a type of terminal operation, the terminal operation is not performing a first operation, a second operation, and a third operation, the N time units belong to a same transmission time unit, and any one of the N time units includes at least one symbol, where N is an integer greater than 0. The terminal side device determines the N time units based on the first indication information, and performs the corresponding terminal operation in the first time unit in the N time units.

Abstract: This application provides a method, which includes: receiving, by a terminal side device, physical layer signaling sent by a network side device in a first frequency band; and determining, by the terminal side device, a sequence number of a first time transmission unit in a second frequency band, where the first time transmission unit includes a time resource indicated by the physical layer signaling, the sequence number of the first time transmission unit is greater than or equal to a sequence number of a second time transmission unit in the second frequency band, an end time of the physical layer signaling is within a time range of the second time transmission unit, and a subcarrier spacing of the first frequency band is different from a subcarrier spacing of the second frequency band.

Abstract: A communication method and a communication apparatus are described. A network device explicitly indicates, by using indication information, a transmission priority of data that can be carried on a scheduled transmission resource. After receiving the indication information, a terminal device can determine whether data currently to be sent can be sent on the scheduled transmission resource, to reduce a probability of a communication failure caused by resource preemption in a scenario in which data of at least three transmission priorities coexists. The terminal device may further determine, based on the indication information, whether to-be-received data exists on the scheduled transmission resource.

Abstract: This application provides a reference signal transmission method, a terminal device, and an access network device. By receiving first indication information from the access network device, the terminal device can determine, based on the first indication information, whether N1 resource blocks that are in a rate matching pattern group and that have an intersection with a time-frequency resource for transmitting a downlink data channel can be used to transmit the downlink data channel, and further determine a position of a reference signal of downlink data channel, to implement reference signal transmission.

Abstract: A resource determining method includes: receiving configuration information of a PDCCH candidate set, the PDCCH candidate set includes a first PDCCH candidate group and a second PDCCH candidate group, the first PDCCH candidate group includes a first PDCCH candidate, the second PDCCH candidate group includes a plurality of second PDCCH candidates, and a resource corresponding to a target first PDCCH candidate in the first PDCCH candidate group and a resource corresponding to a target second PDCCH candidate in the second PDCCH candidate group have a first overlapping part; receiving a first PDCCH, where the first PDCCH indicates a second resource available for a first PDSCH, and the first resource and the second resource have a second overlapping part; and receiving the first PDSCH on a resource obtained by removing the second overlapping part from the second resource.

Abstract: A communication method includes that when a physical downlink control channel (PDCCH) carrying downlink control information (DCI) is a first PDCCH candidate or a second PDCCH candidate, where the first PDCCH candidate and the second PDCCH candidate correspond to a same resource, and the first PDCCH candidate and a third PDCCH candidate belong to a PDCCH candidate group configured for PDCCH repetition transmission, a reference PDCCH candidate is determined according to the PDCCH candidate group, or the second PDCCH candidate is used as a reference PDCCH, so that a network device and a terminal have a consistent understanding of the reference PDCCH candidate.

Abstract: This application provides a control information transmission method, a base station, and a terminal. The method includes: extracting a radio resource from a preset resource block set, and sending control information in a first time period by using the radio resource. The base station includes a processor and a transmitter. The processor is configured to extract a radio resource from a preset resource block set, and the transmitter is configured to send control information in a first time period by using the radio resource. According to the control information transmission method provided in this application, the base station can send the control information in any time period, and the terminal can receive the control information in any time period, thereby shortening a time interval between two control information transmissions.

Abstract: A terminal device receives a first message, and parses the first message. The first message includes a configuration that is related to PDCCH repetition transmission, and the configuration is related to the PDCCH repetition transmission is for determining M groups of PDCCH candidate sequences. Each group of PDCCH candidate sequences includes K PDCCH candidates, the K PDCCH candidates are for sending same downlink control information, and the K PDCCH candidates included in each group of PDCCH candidate sequences are separately located on different symbols. A PDCCH candidate in the M groups of PDCCH candidate sequences meets a first condition.

Abstract: This application discloses an apparatus for a physical uplink control channel (PUCCH) transmission. The apparatus is configured to obtain M cells that have a PUCCH transmission capability in a PUCCH group, receive, from a network device, first indication information indicating a first cell in the M cells, and receive, from the network device, second indication information indicating a time domain position of a first PUCCH. The terminal sends the first PUCCH to the network device on the first cell.

Abstract: A method for determining an HARQ-ACK codebook includes that a terminal determines, based on a time domain offset of HARQ-ACK feedback information, a DCI format set corresponding to the time domain offset, and determines a time domain location information set based on the DCI format set to determine a quantity of information bits of the HARQ-ACK codebook based on the time domain location information set.

Abstract: A radio communication method, and apparatus are provided. The method includes: obtaining, in a second scheduling period based on a first candidate downlink control channel, a second candidate downlink control channel from a control resource set corresponding to the second scheduling period, the first candidate downlink control channel and the second candidate downlink control channel comprise the same downlink control information, a correspondence exists between a first aggregation level of the first candidate downlink control channel and a second aggregation level of the second candidate downlink control channel, and an offset exists between a sequence number of the second candidate downlink control channel and a sequence number of the first candidate downlink control channel; and combining and decoding the first candidate downlink control channel and the second candidate downlink control channel.

Abstract: Example resource determining methods, indication methods, and apparatus are described. On example method includes receiving a downlink data channel by a terminal from a network device. The terminal determines a first uplink control channel resource from a plurality of uplink control channel resources based on an index of the last symbol for the downlink data channel and a time for processing the downlink data channel by the terminal. The terminal sends acknowledgment information to the network device on the first uplink control channel resource, where the acknowledgment information is used to determine a reception status of the downlink data channel.

Abstract: This application provides a physical downlink control channel monitoring method and an apparatus. The method includes: determining that a first monitoring capability of a terminal device is used to monitor a physical downlink control channels of a cell set of the terminal device, determining N non-overlapping time units of the cell set in one slot, where a start location of each of the N time units is based on a span of a cell in the cell set, and allocating the first monitoring capability in the cell set based on the N time units to separately monitor a physical downlink control channel of each cell in the cell set, so that in a carrier aggregation (CA) scenario, the terminal can monitor a physical downlink control channel at a granularity of a span.

Abstract: This application provide a resource indication method and a related device. According to the method provided in this application, a terminal device can send a HARQ-ACK on a PUCCH resource in at least one sub-slot. The resource indication method may be applied to the terminal device. The method may include: The terminal device may receive DCI from a network device, where the DCI indicates a slot used by the terminal device to transmit a HARQ-ACK. After receiving the DCI, the terminal device may send the HARQ-ACK on a PUCCH resource in at least one sub-slot of the slot indicated by the DCI. The slot includes at least two sub-slots. In other words, the terminal device may send the HARQ-ACK on a PUCCH resource in one sub-slot of the slot, or may send the HARQ-ACK on a PUCCH resource in a plurality of sub-slots of the slot.

Abstract: This application relates to the field of communications technologies, and discloses a communication method and apparatus. The method includes: when a terminal device determines transmission statuses of N time-frequency resource groups based on transmission indication information sent by a network device, if a time-frequency resource group is separated into a former half and a latter half by one or more first symbols in time domain, the former half of the time-frequency resource group may be combined into a previous time-frequency resource group of the time-frequency resource group, or the latter half of the time-frequency resource group may be combined into a next time-frequency resource group of the time-frequency resource group, to determine a transmission status.