Abstract: This application relates to the field of communication technologies, and discloses a communication method and apparatus. The method includes: A network device determines energy saving information of a first cell, where the energy saving information indicates a compensation value corresponding to a first energy saving state, and when the first cell is in the first energy saving state, the compensation value is used to compensate a measurement value of an SSB associated with the compensation value; and sends the energy saving information to a terminal device. According to the method, the network device may perform an energy saving operation on the SSB (for example, reducing a transmit power of the SSB), and send the energy saving information of the first cell to the terminal device.

Abstract: A cooperative power transfer method and a related apparatus. The method includes: receiving a cooperative power transfer signal, where the cooperative power transfer signal is a superposed signal of a power transfer signal sent by a first network device and a power transfer signal sent by a second network device, and a receive peak of the power transfer signal of the first network device overlaps a receive peak of the power transfer signal of the second network device; and processing the cooperative power transfer signal. According to the method, radio power transfer efficiency can be improved.

Abstract: This application provides a random access method and a communication apparatus. The method includes: receiving, by a terminal device, a response message from a network device; determining, by the terminal device, a message format of the response message, where the message format includes a first format or a second format; and parsing, by the terminal device, the response message based on the determined message format, where the response message in the first format includes a contention resolution identity and a control plane message; and the response message in the second format includes a contention resolution identity and includes no control plane message. A two-step random access method provided in this application includes two message formats of a random access response.

Abstract: This application provides an example vehicle to everything (V2X) communication method and an example V2X communications apparatus. According to the method, different transmission parameters can be selected for data packets corresponding to different services, ProSe per-packet priority (PPPP) of services, ProSe per-packet reliability (PPPR) of services, or quality of service flow identifiers (QFIs) based on service information of the data packets.

Abstract: This application provides a method for processing timing advance (TA) of a terminal, and an apparatus. A terminal obtains a correspondence between first TA and a beam, determines, based on the correspondence, the beam corresponding to the first TA, and further determines, based on the beam corresponding to the first TA, whether the first TA is invalid. According to this application, the terminal may determine, by using a finer granularity, whether the first TA is invalid, and this helps trigger selection of more appropriate TA, thereby further reducing interference between uplink transmission.

Abstract: Described is a network device (203) configured to operate as a first node in a communications network (200) for a user device (201) initiating a small data transmission communication session through a target node (202) in the communications network (200), the network device (203) being configured to, upon receiving a request from the target node (202), send a message to the target node (202), the message comprising an indication of small data transmission configuration information (401, 506) for the user device (201). A corresponding network device (202) configured to operate as a target node is also described.

Abstract: This application relates to the field of communication technologies, and discloses a communication method and apparatus. The method includes: A first network device receives energy saving information of M cells from a second network device, and sends second request information to the second network device based on the energy saving information of the M cells, where the second request information is for requesting to add N cells in the M cells to a secondary cell group of a terminal device. According to the method, the first network device may determine, based on the energy saving information of the M cells of the second network device, whether to request to add the second network device as a secondary network device of the terminal device.

Abstract: A cell measurement method and cell measurement apparatus, the method including receiving, by a terminal device, first information from a network device, where the first information indicates a measurement parameter used by the terminal device to perform cell measurement in an idle state or an inactive state, and a detection signal for the cell measurement includes at least a synchronization sequence or physical broadcast channel block (SSB) or a channel state information reference signal (CSI-RS), and sending, by the terminal device, a measurement result of the cell measurement to the network device based on the first information.

Abstract: This application provides a data packet integrity protection method and apparatus, and a storage medium. A first network device configures a terminal to perform integrity protection on a part of data packets in a MAC PDU. After receiving a first data packet and a second data packet from the terminal, a second network device sends the first data packet, the second data packet, and first indication information to the first network device, to indicate that the two data packets belong to a same MAC PDU. When failing to perform integrity verification on the first data packet based on the first indication information fails, the first network device discards the foregoing two data packets. This reduces complexity of integrity protection.

Abstract: A method includes: determining a first RACH resource used for a current round of random access, where the first RACH resource includes a first random access preamble, a quantity N of repeated transmissions of the first preamble, and a first physical random access channel PRACH resource required for transmission of the first preamble each time, the first PRACH resource is located on a first transmission channel, and the first transmission channel is located on an unlicensed spectrum; before each attempt to perform transmission of the first preamble, performing listen before talk LBT detection on the first transmission channel on which the first PRACH resource is located; and when the LBT detection succeeds once, performing transmission of the first preamble once by using the first PRACH resource.

Abstract: This application provides a communication method and apparatus, and relates to the communication field, to resolve a problem that resource utilization is low because a network device cannot release a context of a terminal device in a timely manner when an SDT failure occurs, thereby improving resource utilization. The method includes: obtaining small data transmission SDT failure information; releasing an access stratum AS context of a terminal device based on the SDT failure information; and sending a first request message to a core network device. The first request message includes the SDT failure information, and the first request message is used to request the core network device to release a non-access stratum NAS context of the terminal device.

Abstract: This application provides a random access method and a communications apparatus. The method includes: determining at least one random access preamble from at least one 2-step random access preamble, or determining one type of random access preamble from at least one 2-step random access preamble and at least one 4-step random access preamble, and performing random access by using the determined random access preamble. According to the application, the terminal device can determine a type of random access to be performed, thereby reducing an access latency.

Abstract: Embodiments of this application disclose a communication method and apparatus. The method includes: A terminal device receives first indication information and security parameter information that are sent by a first network device, where the first indication information indicates that use of a security verification-based system information obtaining mechanism is allowed, and the security parameter information is used to perform security verification on system information; and sends a first message to a second network device, where the first message is used to request security verification-based first system information. According to embodiments of this application, security verification-based system information is obtained, so that the system information is prevented from being tampered with, and security of the system information is improved.

Abstract: This application provides a communication method and a communication apparatus. The method includes: receiving first DCI from a network device; and determining, based on the first DCI, that first data scheduled by the first DCI includes a first SIB 1, where the first SIB 1 includes information related to network access in a first operation mode. The first DCI includes first indication information, and the first indication information indicates that the first data includes the first SIB 1. Alternatively, one or more of the following information associated with the first DCI is different from that associated with second DCI: scrambling information, DCI format information, time domain or frequency domain resource information, the second DCI is used to schedule a second SIB 1, and the second SIB 1 includes information related to network access in a second operation mode.

Abstract: A random access method is provided including: a terminal side device obtains first uplink data from a first message buffer, wherein the first message buffer is a buffer specific to a first random access procedure, the first random access procedure is a procedure in which the terminal side device sends a first random access request, sends the first uplink data on a first uplink resource, and receives response information, and the response information is a first random access response to the first random access request or a response to the first uplink data. The terminal side device sends the first random access request to a network side device, and sends the first uplink data to the network side device on the first uplink resource. The terminal side device detects downlink control information, wherein the downlink control information indicates a resource of the response information.

Abstract: This application provides a transmission method and a communications apparatus, to simplify LBT behavior before a terminal device can transmit a HARQ feedback, and reduce implementation complexity. The method includes: receiving first DCI, where the first DCI is used to indicate or activate a downlink transmission resource; receiving downlink data on the downlink transmission resource; receiving second DCI, where the second DCI is used to indicate an uplink transmission resource, and the uplink transmission resource is used to transmit feedback information for the downlink data; and sending the feedback information on the uplink transmission resource.

Abstract: A network device determines a priority sequence of a plurality of features, where the priority sequence of the plurality of features is used for random access resource selection. The network device sends first indication information indicating the priority sequence of the plurality of features to a terminal device.

Abstract: A beam failure recovery method and a communication apparatus are provided. The method includes: A terminal device initiates a random access process when detecting that a beam failure occurs on all M TRPs associated with a special cell; determines available beams of N TRPs in the M TRPs, where 1<N?M, and M and N are integers; and sends first information to a network device in the random access process, where the first information indicates information about the available beams of the N TRPs, and each of the N TRPs corresponds to one available beam. After receiving the first information, the network device returns a random access response message to the terminal device.

Abstract: Embodiments of this application disclose a data transmission method and an apparatus. The method includes: When a terminal device is in a radio resource control RRC inactive state, the terminal device selects a first synchronization signal block SSB at first time, and sends first small data transmission SDT data to a network device by using a first configured grant CG resource corresponding to the first SSB; and when signal quality of a plurality of SSBs at second time is greater than a first threshold, the terminal device preferentially selects the first SSB from the plurality of SSBs at the second time, and sends second SDT data to the network device by using a second CG resource corresponding to the first SSB.

Abstract: This application provides an uplink transmission method and a communication apparatus. When a terminal device does not obtain a TA value in a two-step random access process, the terminal device can transmit, based on a preset TA value or a maintained TA value, uplink data on an uplink transmission resource assigned in the second step of random access, or perform, based on a preset TA value or a maintained TA value, a feedback for downlink data transmitted on a downlink transmission resource assigned in the second step of random access. In this way, uplink synchronization can be implemented when no TA value is assigned in a random access process.