Abstract: A method for obtaining a quantity of resource elements in a communication process, comprising: determines a downlink control information format of downlink control information, obtains, based on the downlink control information format, a quantity of resource elements occupied by a demodulation reference signal (DMRS); and determines a size of transport block (TBS) based on the quantity of resource elements occupied by the DMRS.

Abstract: This application provides an example method and an example apparatus for generating hybrid automatic repeat request (HARQ) information. The method includes receiving, by a terminal device, a first message sent by a network device. The first message is used to indicate that there are a plurality of active bandwidth parts (BWPs) in a cell or that there are M BWP groups in the cell, the M BWP groups may be obtained by dividing, by the network device, N configured BWPs, any BWP group includes an active BWP, M and N are integers greater than or equal to 2, and M is less than or equal to N. The method also includes generating, by the terminal device, HARQ information based on the plurality of active BWPs or the M BWP groups.

Abstract: The middle subcarrier of the baseband OFDM signal of each numerology may need to be shifted appropriately with respect to other numerologies to comply with a nested grid. These shifts can be signalled to the UE with an associated overhead. Methods and systems are provided to reduce overhead for OFDM communication. Reduced overhead can translate into increased bandwidth for the system, and/or reduced power/battery consumption in the UE. A transmitter generates an OFDM signal associated with a first subcarrier spacing of a first numerology (?), a middle subcarrier frequency of a set of usable resource blocks (RBs) of the first numerology being offset from a carrier frequency by a first offset having a value (k0,x?) in units of subcarriers, the value of the first offset being defined by a specific formula. The transmitter transmits the OFDM signal according to the first subcarrier spacing and the first offset.

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: An embodiment of this application provides a downlink control information transmission method and an apparatus. The method includes: receiving first downlink control information DCI in search space of a first carrier bandwidth part BWP, where if a frequency domain resource allocation type of the first BWP is a type 0, an Lf-bit frequency domain resource allocation indication in the first DCI is an Lf-bit bitmap, and bits in the Lf-bit bitmap in descending order are respectively corresponding to resource block groups RBG 0 to RBG (Lf?1) in a second BWP; and for one bit in the Lf-bit bitmap, when a value of the bit is t1, an allocated resource includes one RBG corresponding to the bit.

Abstract: This application provides example communication methods, terminal devices, and network devices. One example method includes configuring, by a network device, a first bandwidth part BP and a second BP for a terminal device. The network device then sends a first TB to the terminal device. When the first BP and the second BP correspond to a same physical parameter, the first TB is mapped onto the first BP and the second BP. When the first BP and the second BP correspond to different physical parameters, the network device further sends a second TB to the terminal device, where the first TB is mapped onto the first BP, and the second TB is mapped onto the second BP.

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: Embodiments of this application disclose a wireless communication method and an apparatus, to improve robustness of data transmission between a terminal device and a node device. The method in the embodiments of this application includes: A terminal device incorrectly receives first data in a first cell, where the first cell is a first primary cell. The terminal device sends first indication information in a second cell, where the second cell is a secondary cell or a second primary cell, and the first indication information is used to indicate that the first data is incorrectly received in the first cell, or is used to request transmission of the first data in the second cell. The terminal device receives the first data in the second cell.

Abstract: This application provides a method for generating hybrid automatic repeat request HARQ information and an apparatus. The method includes: A terminal device receives a first message sent by a network device. The first message is used to indicate that there is a bandwidth part BWP combination in a cell, the BWP combination includes an active BWP, and the BWP corresponds to a set of unified parameters. The terminal device generates HARQ information based on the unified parameters corresponding to the BWP combination. This application provides a method for generating HARQ information when there are a plurality of active BWPs.

Abstract: A method for a multicast service is provided. In this example, the method includes receiving, by a user equipment (UE), a control format including a resource allocation field from a base station (BS), the resource allocation field indicating a starting resource block (RB) index and an RB range, obtaining a set of RBs allocated for a multicast physical downlink shared channel (PDSCH) or physical uplink shared channel (PUSCH) based on a starting RB location and the RB range; wherein the starting RB location is associated with the starting RB index and at least one of a reference RB location or an assigned sub-band; and transmitting or receiving, by the UE, data over at least one RB of the set of RBs allocated for the multicast PDSCH or PUSCH.

Abstract: A method is provided, comprising: receiving resource indication information sent by a network device, where the resource indication information is used to indicate resource block groups RBGs allocated to the terminal device in a bandwidth part BWP, and the BWP includes N segments of frequency domain resources; for one of the N segments of frequency domain resources, a size P of an RBG other than the first RBG and the last RBG in the segment of frequency domain resources is determined based on a sum of bandwidths of the N segments of frequency domain resources; and for one of the N segments of frequency domain resources, a size of the first RBG in the segment of frequency domain resources is determined based on a start location of the segment of frequency domain resources and P; and transmitting a signal on the resource block groups RBGs allocated to the terminal device.

Abstract: A method includes receiving a first assignment for a first transmission with a first hybrid automatic repeat request (HARQ) process identifier (process ID) in a first network resource, receiving a second assignment for a second transmission with a second HARQ process ID in a second network resource, wherein the first network resource and the second network resource differ in a domain other than a time domain, detecting an indication indicating that the first HARQ process ID and the second HARQ process ID map to a same transmission block (TB), and communicating with an access node, a transmission associated with at least one of the first HARQ process ID or the second HARQ process ID.

Abstract: A method includes receiving a first assignment for a first transmission with a first hybrid automatic repeat request (HARQ) process identifier (process ID) in a first network resource, receiving a second assignment for a second transmission with a second HARQ process ID in a second network resource, wherein the first network resource and the second network resource differ in a domain other than a time domain, detecting an indication indicating that the first HARQ process ID and the second HARQ process ID map to a same transmission block (TB), and communicating with an access node, a transmission associated with at least one of the first HARQ process ID or the second HARQ process ID.

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 data transmission method and an apparatus. In the method, a first data unit is received from a server or a data network, wherein the first data unit comprises first identification information and second identification information, a target transmission requirement corresponding to the first data unit is obtained based on the first identification information, protocol data encapsulation is performed on the first data unit based on the target transmission requirement, to obtain a second data unit that comprises third identification information related to the second identification information; and the second data unit is sent to an access network device.

Abstract: The application provides a resource configuration method including: determining, by a network device, N downlink virtual carriers or determining N downlink virtual carriers and M uplink virtual carriers, where the N downlink virtual carriers are configured in a same cell, or the N downlink virtual carriers and the M uplink virtual carriers are configured in a same cell, and the cell includes at least one carrier, and the N downlink virtual carriers correspond to a same parameter set, or the N downlink virtual carriers correspond to a same parameter set, and the M uplink virtual carriers correspond to a same parameter set, N>1, and N?M?1; and sending, by the network device, configuration information to a terminal, where the configuration information is used to configure the N downlink virtual carriers or used to configure the N downlink virtual carriers and the M uplink virtual carriers.

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 method for determining time information is disclosed. The method includes: obtaining, by a network node, information sent by a terminal device; and determining, by the network node, at least one of the following based on the information: a first time interval between downlink scheduling and downlink data transmission, a second time interval between the downlink data transmission and a feedback message sent by the terminal device after the terminal device receives downlink data, and a third time interval between uplink scheduling and uplink data transmission, where the information may include at least one of a subcarrier spacing, an operating band, and a bandwidth that are supported by the terminal device, and further include a first smallest value and/or a second smallest value and/or a third smallest value corresponding to the at least one item. Therefore, flexibility and accuracy of determining the time information are improved.

Abstract: An embodiment of this application provides a downlink control information transmission method and an apparatus. The method includes: receiving first downlink control information DCI in search space of a first carrier bandwidth part BWP, where if a frequency domain resource allocation type of the first BWP is a type 0, an Lf-bit frequency domain resource allocation indication in the first DCI is an Lf-bit bitmap, and bits in the Lf-bit bitmap in descending order are respectively corresponding to resource block groups RBG 0 to RBG (Lf?1) in a second BWP; and for one bit in the Lf-bit bitmap, when a value of the bit is t1, an allocated resource includes one RBG corresponding to the bit.

Abstract: A method and an apparatus for determining an RBG size are provided. In the method, a network device or a terminal determines an RBG size set, where the RBG size set may include one or more possible RBG sizes; and determines a first RBG size included in the RBG size set. The network device allocates a resource to the terminal by using the determined first RBG size. The terminal determines, based on the determined first RBG size, the resource allocated by the network device to the terminal.