Abstract: In a signal transmission method and apparatus, a network device sends scheduling information of at least one of two carriers whose communication directions are opposite on a target OFDM symbol; a terminal device performs channel transmission of a target carrier on the target OFDM symbol based on the scheduling information, where the target carrier is one of carriers that are of the two carriers whose communication directions are opposite and that have channel transmission on the target OFDM symbol; and the network device performs channel transmission on the target OFDM symbol and the target carrier. A time domain resource may be allocated to a carrier on which transmission scheduling is currently performed, thereby improving transmission resource utilization and reducing a waiting delay.

Abstract: A communication method and a communications apparatus are provided. A principle of the method is as follows. Currently, for downlink data transmitted in a semi-persistent scheduling manner, only 1-bit acknowledgment information can be fed back in one time unit. However, as a transmission periodicity P of the downlink data transmitted in the semi-persistent scheduling manner becomes smaller, multi-bit acknowledgment information may need to be fed back in one time unit. In view of this, this application provides a communication method and a communications apparatus to feed back multi-bit acknowledgment information in one time unit. First, multi-bit acknowledgment information to-be-sent in one time unit is determined; then N acknowledgment codebooks are generated, where the N acknowledgment codebooks are used to carry the multi-bit acknowledgment information; and finally, the N acknowledgment codebooks are sent in the time unit.

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: A communications method, and apparatus are provided, to reduce a transmission latency when a plurality of HARQ-ACKs are transmitted in one time unit. The method includes: determining, in N groups of time-frequency resources based on the grouping relationship, the ith group of time-frequency resources corresponding to a first parameter related to the first DCI, receiving first DCI, and determining a first uplink channel that carries a first HARQ-ACK on a first time-frequency resource in the ith group of time-frequency resources, where the grouping relationship represents a correspondence between a first parameter and N groups of time-frequency resources, the N groups of time-frequency resources are obtained by grouping time-frequency resources in one time unit, each group of time-frequency resources corresponds to one or more first parameters, and the first parameter is related to DCI, a time-frequency resource in each group of time-frequency resources is for an uplink channel carries a HARQ-ACK.

Abstract: A network device sends indication information to a terminal device, to indicate a reference position of a starting symbol of a data channel. The network device sends a physical downlink control channel to the terminal device. Then the network device sends the data channel to the terminal device, or the network device receives the data channel from the terminal device.

Abstract: This application provides an uplink acknowledgement information transmission method, the method includes: A terminal device may obtain a plurality of first HARQ-ACK codebooks, where each of the plurality of first HARQ-ACK codebooks includes HARQ-ACK information of at least one downlink data channel, each first HARQ-ACK codebook corresponds to one first radio network temporary identifier RNTI, and first RNTIs corresponding to the first HARQ-ACK codebooks are different. Then, the terminal device may send a physical uplink channel to a network device, where the physical uplink channel carries a second HARQ-ACK codebook, the second HARQ-ACK codebook includes at least one of the plurality of first HARQ-ACK codebooks that are concatenated in a preset order, and the preset order is determined based on a plurality of first RNTIs corresponding to the plurality of first HARQ-ACK codebooks.

Abstract: This application provides a data transmission (including receiving and sending) method. The method includes: A terminal device receives downlink control information DCI, where cyclic redundancy check CRC of the DCI is scrambled by using a first RNTI, the DCI is used to schedule a first downlink data channel, and the first downlink data channel is scrambled by using a second RNTI; and the terminal device receives the first downlink data channel based on the DCI. The DCI includes a DAI domain and/or an FDRA domain. The DAI domain indicates a count of first HARQ-ACK information in a first HARQ-ACK codebook, and the first HARQ-ACK codebook corresponds to the first RNTI. The FDRA domain indicates, within a frequency domain range of a public frequency resource, a scheduled frequency domain resource on the first downlink data channel.

Abstract: This application provides a communication method, a terminal device, and a network device. The method performed by a terminal device includes: determining N resource areas, where N is a positive integer; detecting, downlink scheduling information in M resource areas, where the downlink scheduling information includes resource indication information of P resource areas; and determining based on the resource indication information of the P resource areas, a resource for transmitting downlink data, where the M resource areas are M of the N resource areas, the P resource areas are P of the N resource areas, M is a positive integer less than or equal to N, and P is a positive integer less than or equal to N.

Abstract: This application provides a communication method and apparatus. A terminal receives from a network device, first indication information indicating N sets of information of feedback time, each of the N sets comprises at least one piece of information of feedback time, each of the at least one piece of information of feedback time indicates a quantity of time units comprised in a feedback time of a data block. The terminal receives downlink control information (DCI) from the network device, wherein the DCI comprises second indication information indicating first information of feedback time of the data block, and the first information of feedback time belongs to a first set of information of feedback time, and the first set is one of the N sets. The terminal sends the response message for the data block to the network device based on the second indication information and the first indication information.

Abstract: Embodiments of this application provide a communication method, a terminal device, and a network device. Referring to the method, blind detection of a terminal device can be performed in different scheduling periods based on a maximum number of blind detection in a preset time period, thereby helping to reduce energy consumption that is caused to a terminal device by blind detection, and reduce blind detection complexity.

Abstract: This application discloses communication methods and communication apparatuses. A terminal device receives indication information from a network device. The indication information includes one or more indication parameters. The terminal device obtains one or more pieces of configuration information based on the indication parameters. The terminal device performs uplink or downlink data transmission according to the one or more pieces of configuration information. Each pieces of configuration information includes information of a starting location and information of a quantity of time domain symbols in a slot that are occupied by uplink data or downlink data. Each piece of configuration information is selected from a first set of configuration information or a second set of configuration information.

Abstract: This application provides an information transmission method and a communication apparatus. The method includes: A terminal device determines a first resource in a first time unit, where the first resource carries first feedback information, and the first feedback information is feedback information of first data; and the terminal device sends the first feedback information to a network device on a second resource in a second time unit in the case that the first resource includes a non-uplink resource, where the second time unit is a time unit later than the first time unit in time.

Abstract: A communication method includes determining a third time unit and a fourth time unit. The third time unit includes all or a part of time units that are in at least one first time unit and that are used for transmission in a first transmission direction. A first signal is transmitted in the at least one first time unit in the first transmission direction based on a quantity of repeated transmissions. The fourth time unit is located after the at least one first time unit in a time domain, and the third time unit and the fourth time unit meet a requirement of transmitting the first signal based on the quantity of repeated transmissions. The method also includes repeatedly transmitting the first signal in the third time unit and the fourth time unit.

Abstract: This application provides a feedback information transmission method and an apparatus. The method includes a terminal device that receives indication information from a network device. The indication information indicates to generate a semi-static codebook. The terminal device detects a first physical downlink shared channel (PDSCH) at M candidate receiving positions in a first time unit. The first PDSCH is a semi-persistent scheduling (SPS) PDSCH or a grant-free PDSCH, and M is a positive integer. The terminal device determines, based on a detection result of the first PDSCH, whether to send first feedback information to the network device. The first feedback information includes acknowledgement (ACK) information or negative acknowledgement (NACK) information indicating whether the first PDSCH detected at the M candidate receiving positions is correctly decoded.

Abstract: This application discloses communication methods and communication apparatuses. A terminal device receives indication information from a network device. The indication information includes one or more indication parameters. The terminal device obtains one or more pieces of configuration information based on the indication parameters. The terminal device performs uplink or downlink data transmission according to the one or more pieces of configuration information. Each pieces of configuration information includes information of a starting location and information of a quantity of time domain symbols in a slot that are occupied by uplink data or downlink data. Each piece of configuration information is selected from a first set of configuration information or a second set of configuration information.

Abstract: A network device sends indication information to a terminal device, to indicate a reference position of a starting symbol of a data channel. The network device sends a physical downlink control channel to the terminal device. Then the network device sends the data channel to the terminal device, or the network device receives the data channel from the terminal device.

Abstract: Embodiments of this application provide a communication method, a terminal device, and a network device. Referring to the method, blind detection of a terminal device can be performed in different scheduling periods based on a maximum number of blind detection in a preset time period, thereby helping to reduce energy consumption that is caused to a terminal device by blind detection, and reduce blind detection complexity.

Abstract: This application discloses a downlink data sending method, a downlink data receiving method, and an apparatus, and relates to the communication field, to resolve a problem that feedback information fails to be sent, and consequently, a retransmission probability of downlink data is increased, and data transmission efficiency is reduced. When at least two of P PDSCHs in one slot overlap in time domain, a network device cancels sending of partially overlapping PDSCHs. If one first PDSCH whose sending is canceled is the last repetition in PDSCH repetitions of first data, and a terminal device receives another repetition in the PDSCH repetitions of the first data before the first PDSCH, the terminal device still sends feedback information for the first data to the network device in a feedback slot corresponding to the first PDSCH.

Abstract: A feedback information sending method and an apparatus are provided. The method includes: A network device sends, to a terminal device, M pieces of DCI for scheduling N transmissions of first data, values in DAI fields comprised in all of the M pieces of DCI are the same; and the terminal device sends feedback information of the first data to the network device, wherein the feedback information is comprised in an HARQ-ACK codebook, and a location of the feedback information in the HARQ-ACK codebook is determined based on a DAI field in first DCI of the M pieces of DCI.

Abstract: Feedback information sending methods and apparatuses are provided in this disclosure. One method includes receiving, from a network device, M pieces of downlink control information (DCI) for scheduling transmissions of N pieces of data, the M pieces of DCI comprise first DCI and second DCI, determining, based on resource indication information in third DCI, a time-frequency resource for sending a hybrid automatic repeat request-acknowledgement (HARQ-ACK) codebook that comprises feedback information for N pieces of data corresponding to N pieces of DCI of the M pieces of DCI, and sending the HARQ-ACK codebook to the network device on the time-frequency resource.