Abstract: This application provides a sidelink resource configuration method and apparatus. The method includes: configuring, by a network device, sidelink bandwidth part (SL BWP) configuration information for a terminal device, where the SL BWP configuration information is used to indicate a common first parameter of M resource pools in the SL BWP; and configuring, by the terminal device, the M resource pools in the SL BWP based on the SL BWP configuration information in a process of configuring the resource pools in the SL BWP, where the M resource pools have at least one same parameter, and the at least one parameter is determined based on the first parameter. Therefore, communication between different terminal devices can be implemented by configuring the resource pools in the SL BWP.

Abstract: A power control method includes determining priorities of uplink transmission and sidelink transmission, where the uplink transmission is used to transmit uplink information by a first terminal device to a network device, and the sidelink transmission is used to transmit sidelink information by the first terminal device to a second terminal device; determining target information that is in the sidelink information and that overlaps with the uplink information in time domain in a scheduling time unit; determining transmit powers of the uplink information and the target information based on the target information and the priorities of the uplink transmission and the sidelink transmission; and sending the uplink information based on the transmit power of the uplink information, or sending the target information based on the transmit power of the target information.

Abstract: This application provides a resource scheduling method and a communication device. The method includes: receiving a first message on a first downlink carrier of a first cell, where the first message indicates scheduling information of a physical downlink shared channel PDSCH, and the PDSCH corresponds to the first downlink carrier of the first cell and a second downlink carrier of a second cell; receiving a second message, where the second message indicates scheduling information of a physical uplink shared channel PUSCH of a first uplink carrier of the second cell; and sending the PUSCH on the first uplink carrier of the second cell based on the second message.

Abstract: This application relates to the field of communication technologies, and discloses a communication method and apparatus. The method includes: A terminal device works on a plurality of downlink carriers, and the plurality of downlink carriers include a first downlink carrier and a second downlink carrier. The terminal device obtains first channel information, where the first channel information includes second channel information, and the first downlink carrier and the second downlink carrier share the second channel information; and sends the first channel information to an access network device. In this manner, the first downlink carrier and the second downlink carrier support sharing of a part or all of channel information.

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: This application provides a hybrid automatic repeat request HARQ codebook generation method and an apparatus. The method includes: A terminal device receives a first message from a network device, where the first message is for scheduling downlink data in a plurality of cells. The terminal device generates a HARQ codebook based on the first message. This application provides the HARQ codebook generation method for a case in which there are a plurality of scheduled cells. According to the foregoing method, transmission performance can be effectively ensured. For example, a transmission opportunity can be effectively increased, or a transmission error caused by poor channel quality can be effectively avoided, so that a flexible and variable service volume and/or communication requirement can be met.

Abstract: A communication method and apparatus the method including generating indication information, and sending the indication information to a terminal, wherein the indication information indicates to the terminal to activate a first frequency domain resource pair comprising an uplink frequency domain resource and a downlink frequency domain resource, wherein the uplink frequency domain resource is associated with the downlink frequency domain resource, wherein the uplink frequency domain resource and the downlink frequency domain resource have a same center frequency, wherein the uplink frequency domain resource and the downlink frequency domain resource are bandwidth parts on a carrier, wherein the bandwidth parts each have a bandwidth that is smaller than a bandwidth of the carrier, and wherein the first frequency domain resource pair is in a deactivated state when the indication information is sent.

Abstract: A communications method includes: obtaining first indication information and format information; and determining, based on a transmission direction that is of a sub-time unit in a time unit and that is indicated by the first indication information and a transmission direction that is of the sub-time unit and that is indicated by the format information, whether the time unit is an aggregation time unit. It is determined, based on the transmission direction that is of the sub-time unit in the time unit and that is configured in the first indication information and the transmission direction that is of the sub-time unit and that is configured in the format information, whether the time unit is an aggregation time unit.

Abstract: Embodiments of this application provide a communication method, apparatus, and system. The method includes: A network device sends first signaling to a terminal device on a downlink primary component carrier, where the first signaling includes configuration information of a secondary cell; the network device sends second signaling to the terminal device; and the network device determines, based on a channel state information CSI report and/or feedback signaling received from the terminal device, that the terminal device successfully activates the secondary cell.

Abstract: Methods, systems and apparatus for communications are provided. In the methods, a network device sends first indication information to a terminal device, where the first indication information indicates a first bandwidth part (BWP) that is to be activated, other than a primary BWP, to the terminal device, and the primary BWP is a BWP that remains activated between the terminal device and the network device. The network device communicates with the terminal device in an activated first BWP and the primary BWP.

Abstract: This application relates to the field of communication technologies, and provides a communication method and apparatus. The method includes: A terminal device receives first downlink control information DCI from a network device through a first physical downlink control channel PDCCH. The first DCI includes a first time domain resource assignment TDRA indicator field, and the first TDRA indicator field is used to indicate a first time domain resource. The terminal device receives or sends data on a second time domain resource after determining the second time domain resource based on a time domain position of the first PDCCH and the first time domain resource. The first time domain resource is different from the second time domain resource. The method is applied to a time domain resource assignment process of the data scheduling.

Abstract: A terminal device receives first indication information from the network device, where the first indication information indicates the terminal device to enter a first state in a first cell, the first state includes a synchronous measurable state, and the first indication information is sent by the network device by using a second cell; and terminal device enters the first state in the first cell based on the first indication information.

Abstract: A signal transmission method and an apparatus are provided. The signal transmission method includes receiving a first message in an active first carrier bandwidth part BWP, and then determining, based on the first message, that a new active BWP of a terminal device is a second BWP, where the second BWP is a BWP in one or more to-be-activated BWPs of the terminal device, and then transmitting a signal in the second BWP. In embodiments of this application, the one or more to-be-activated BWPs is configured, where the to-be-activated BWP is a state configured by a network device for the terminal device. In addition to the first BWP in an active state, the second BWP in a to-be-activated state further exists at the same moment.

Abstract: A communication method and an apparatus are provided. The method includes: A communication apparatus may send uplink capability information to a network device, where the uplink capability information includes at least one of the following: a maximum quantity of uplink carriers configured for the communication apparatus, a maximum quantity of uplink carriers supported by the communication apparatus, and a maximum quantity of channels supported by the communication apparatus. Further, the communication apparatus receives first information from the network device, where the first information indicates an uplink carrier used for uplink transmission, and performs uplink transmission with the network device on the uplink carrier. The communication apparatus may be a terminal device.

Abstract: A method for determining a slot format and a device are disclosed, to determine an ECP slot format. The method for determining a slot format includes: obtaining first indication information, where the first indication information includes indication information of a slot format a, the slot format a is one of slot formats of a first-type slot, the first-type slot includes N symbols, and N is 14; and determining a slot format b of 2(?-?a) consecutive second-type slots based on a subcarrier spacing ?a applicable to the first indication information, a subcarrier spacing ? applicable to the second-type slot, and the indication information of the slot format a, where the second-type slot includes M symbols, and N is not equal to M.

Abstract: This application discloses a resource configuration method, an apparatus, and a system, and relates to the field of communications technologies. The method includes: receiving PDCCH signaling; switching to a target uplink BWP; and sending a preamble sequence by using a PRACH resource included in the target uplink BWP, where the PDCCH signaling is used to trigger a random access procedure.

Abstract: This application relates to the field of communications technologies, and discloses a communication method, a communications apparatus, and a system. The method includes: A terminal device receives first information from a network device, where the first information is used to activate a first secondary cell; and the terminal device performs channel CSI measurement by using a first CSI-RS resource in a process of activating the first secondary cell.

Abstract: A communication method and apparatus the method including generating indication information, and sending the indication information to a terminal, wherein the indication information indicates to the terminal to activate a first frequency domain resource pair comprising an uplink frequency domain resource and a downlink frequency domain resource, wherein the uplink frequency domain resource is associated with the downlink frequency domain resource, wherein the uplink frequency domain resource and the downlink frequency domain resource have a same center frequency, wherein the uplink frequency domain resource and the downlink frequency domain resource are bandwidth parts on a carrier, wherein the bandwidth parts each have a bandwidth that is smaller than a bandwidth of the carrier, and wherein the first frequency domain resource pair is in a deactivated state when the indication information is sent.

Abstract: This application discloses example communication methods and example apparatuses. One example method includes receiving control information from a network device in a first cell, where the control information indicates to initiate a random access process in a second cell, and the control information includes a first identifier of the second cell. A random access process can then be initiated, based on the control information, in the second cell by using a random access parameter associated with the first identifier.

Abstract: A communication method and a communications apparatus are provided. The method includes: sending, by a network device, indication information to a terminal, where the indication information is used to indicate at least one second BP associated with a first BP; and performing signal transmission, by the network device, with the terminal on the first BP and the at least one second BP. It may be learned that the network device indicates, to the terminal by using the indication information, the at least one second BP associated with the first BP, so that the network device and the terminal can transmit signals on BPs that are associated with each other. In addition, there may be a plurality of second BPs associated with the first BP.