Abstract: A communication method includes receiving first information from a network device. The first information is used to configure M communication parameter groups corresponding to N candidate carriers, N is an integer greater than or equal to 1, and M is greater than or equal to N. The communication method also includes receiving second information from the network device. The second information indicates at least one communication parameter group in the M communication parameter groups. The communication method further includes performing communication on at least one carrier based on the at least one communication parameter group, wherein the N candidate carriers comprise the at least one carrier.

Abstract: This application provides example uplink transmission methods and communication apparatuses. One example method includes sending first scheduling information by a network device to a first terminal and a second terminal, where the first scheduling information includes indication information of a sidelink transmission parameter and indication information of a first uplink transmission parameter, the sidelink transmission parameter is used by the first terminal to send first data to the second terminal, and the first uplink transmission parameter is used by the second terminal to send the first data to the network device. The first data is received by the network device from the second terminal.

Abstract: A configuration information sending method and an apparatus is applied to fields such as user cooperation, user relay, and an internet of vehicles. First configuration information is sent to a first user group, where the first configuration information indicates at least one resource element, the first user group includes a first terminal apparatus and a second terminal apparatus, and the first terminal apparatus is configured to assist in information transmission between a first network apparatus and the second terminal apparatus. The first network apparatus sends first downlink control information to the first user group, where the first downlink control information indicates a first resource element in the at least one resource element and a first time-frequency resource, and the first time-frequency resource belongs to the first resource element.

Abstract: A communication method and apparatus includes a terminal that receives first control information from a network device. The first control information includes a first field. The first field indicates single-carrier scheduling or the multi-carrier scheduling. When the first field indicates the single-carrier scheduling, the terminal communicates with the network device on one scheduled carrier. Alternatively, when the first field indicates the multi-carrier scheduling, the terminal communicates with the network device on a plurality of scheduled carriers. According to the method and the apparatus in this application, the first field in the first control information may explicitly or implicitly indicate the single-carrier scheduling or the multi-carrier scheduling, and the network device does not need to additionally send a notification message, thereby reducing air interface overheads.

Abstract: This application provides a resource scheduling method and a communication apparatus. The method includes: A network device sends a plurality of pieces of configuration information to a terminal device, where the plurality of pieces of configuration information include first configuration information and second configuration information, the first configuration information is for configuring scheduling information of a multi-carrier co-scheduling manner to be sent in a first cell, and the second configuration information is for configuring a resource of a second cell to be scheduled in the multi-carrier co-scheduling manner; and the network device sends first scheduling information to the terminal device in the first cell, where the first scheduling information is for scheduling resources of a plurality of cells, and the plurality of cells include the second cell or the first cell and the second cell. In this way, resource utilization and resource scheduling efficiency are improved.

Abstract: A communication method and apparatus are provided. The method includes: A base station sends, to a terminal, first DCI for scheduling a plurality of CCs, where the first DCI includes at least a first field, and the first field is shared by the plurality of CCs. According to the method and the apparatus in this application, information does not need to be independently configured for each CC in the first field in the first DCI, so that payload overheads of the first DCI are reduced.

Abstract: This application provides an uplink transmission method and a communication apparatus. In the method, a terminal device may determine, based on an RRC parameter and/or indication signaling from a network side, according to a predefined selection policy, based on a combination of supported carriers that may be for parallel sending, in a predefined manner, or based on one or a combination of any two or more of these implementations in a plurality of possible radio frequency chain state supporting current uplink transmission, a radio frequency chain state that is during the current uplink transmission.

Abstract: Embodiments of this application provide a PDCCH monitoring method. The method includes: A terminal device monitors a PDCCH on a first PDCCH candidate as indicated by network when at least one RE in the first PDCCH candidate overlaps with at least one RE in the first time-frequency resource as indicated by the network.

Abstract: A data transmission method and apparatus, and a related device, and may be used in the internet of vehicles, for example, V2X, LTE-V, or V2V, or may be used in fields such as D2D, intelligent driving, and intelligent connected vehicle. A network device may send first downlink control information to a first terminal device and a second terminal device, to indicate the first terminal device and the second terminal device to perform user cooperative transmission in a first stage. After the transmission in the first stage is completed, the network device sends second downlink control information to the first terminal device and the second terminal device, to indicate the first terminal device and the second terminal device to perform user cooperative transmission in a second stage. The network device uses a two-level scheduling manner to improve transmission efficiency in the second stage.

Abstract: This application discloses a multi-hop transmission method and an apparatus, which are applicable to fields such as V2X, internet of vehicles, intelligent connected vehicles, assisted driving, and intelligent driving, to resolve a problem that a multi-hop transmission latency is large in a conventional technology. In example embodiments, terminal devices participating in multi-hop transmission may share a shared resource pool. A first terminal device and a second terminal device participating in the multi-hop transmission are used as an example. The multi-hop transmission method includes: sending, by the first terminal device, data to the second terminal device on a first resource in the shared resource pool; and if the first terminal device fails to send the data on the first resource, retransmitting, by the first terminal device, the data to the second terminal device on a second resource in the shared resource pool.

Abstract: A communication method and apparatus are provided. The method includes: A terminal receives first signaling from a network device. The first signaling indicates at least one type of configuration. The terminal receives second signaling from the network device. The second signaling indicates a first configuration included in the at least one type of configuration. The terminal communicates with the network device based on the first configuration. The at least one type of configuration includes at least one of the following: a quantity of PDSCHs, a quantity of PUSCHs, a quantity of CORESET pools for DCI blind detection, a quantity of transport layers for space division multiplexing, a quantity of tracked TCI states, or a quantity of HARQ processes. 10 According to the method and the apparatus in this application, flexible and efficient switching between resources in a baseband processing capability of the terminal can be implemented.

Abstract: The method may include: determining a third frequency-domain data stream, which includes a first frequency-domain data stream and a second frequency-domain data stream, a length of the third frequency-domain data stream is 2N, lengths of both the first frequency-domain data stream and the second frequency-domain data stream are N, data in the first frequency-domain data stream and data in the second frequency-domain data stream are separately mapped to different locations in the third frequency-domain data stream, the first frequency-domain data stream is obtained by performing zero adding processing and Fourier transform processing on a first source data stream, the second frequency-domain data stream is obtained by performing cyclic extension processing on a second source data stream; converting the third frequency-domain data stream into time-domain data and sending the time-domain data to a base station.

Abstract: Embodiments of this application provide a communication processing method for a resource request and a related device. In the communication processing method, a terminal side device sends K uplink resource requests on K (K is an integer greater than or equal to 2) uplink channel resources in a transmission time unit (for example, 1 millisecond) to request an uplink resource used for uplink transmission, where cyclic shifts of a code division multiplexing (CDM) sequence used to send the K uplink resource requests on the K uplink channel resources are specific to the terminal side device, or a value of K is specific to the terminal side device, or a combination of the cyclic shifts and K is specific to the terminal side device.

Abstract: A method for determining a reference signal sequence, a terminal device, and a network device, the including receiving, by a terminal device, first indication information sent by a network device, determining, by the terminal device, a target resource based on the first indication information, determining, by the terminal device, a reference signal sequence based on parameters of a first bandwidth and parameters of a second bandwidth, and sending or receiving, by the terminal device, the reference signal sequence on the target resource.

Abstract: This application provides a data transmission method and apparatus. The data transmission method includes: determining a maximum communications data amount of a terminal device in a first time period, where the first time period is a transmission period of a periodic service, and the maximum communications data amount in the first time period is less than a maximum communications data amount of continuous communication in the first time period; and sending the maximum communications data amount of the terminal device in the first time period.

Abstract: A communication method and apparatus are provided. The method includes: A terminal device sends first data to a network device through a first cell group in an activated state. The terminal device receives a first message from the network device, where the first message is used to deactivate the first cell group. The terminal device changes a state of the first cell group from the activated state to a deactivated state based on the first message of the network device. If the terminal device receives no success acknowledgment of the first data and/or there is second data that has not been transmitted in the first cell group, the terminal device retransmits the first data and/or sends the second data to the network device through a second cell group in an activated state.

Abstract: A method for determining a reference signal sequence, a terminal device, and a network device, the including receiving, by a terminal device, first indication information sent by a network device, determining, by the terminal device, a target resource based on the first indication information, determining, by the terminal device, a reference signal sequence based on parameters of a first bandwidth and parameters of a second bandwidth, and sending or receiving, by the terminal device, the reference signal sequence on the target resource.

Abstract: This application provides a reference signal sending and receiving method, a network device, a terminal device, and a system, to be applicable to resource configuration for an SRS in NR. The method includes: sending, by a terminal device, a sounding reference signal SRS based on a location of a starting subcarrier for transmitting the SRS, where the location of the starting subcarrier for transmitting the SRS is determined by an offset of a sounding region, the offset of the sounding region indicates a resource offset between a starting subcarrier of the sounding region and a starting subcarrier of a bandwidth part BWP of the terminal device, and the sounding region is a resource that can be used to transmit the SRS.

Abstract: A method and an apparatus for switching a cell state are provided, and relate to the field of communication technologies. The method includes: A terminal device receives a first instruction from a network device, and switches a serving cell state based on the first instruction. The first instruction indicates to switch the serving cell state of the terminal device to or from a first state. When the serving cell state is the first state, a downlink carrier of a serving cell supports downlink communication, and an uplink carrier of the serving cell does not support uplink communication.

Abstract: The present disclosure relates to data transmission methods and apparatus. In one example method, a first terminal device receives downlink control information (DCI) from a network device, where the DCI is used to schedule uplink transmission or sidelink transmission, and the DCI indicates data transmission of the first terminal device or the first terminal device to assist in forwarding data of a second terminal device. The first terminal device performs the uplink transmission or the sidelink transmission based on the DCI.