Abstract: A method and a device are provided. The method includes: selecting, by user equipment, a random access preamble from a random access preamble set, and selecting a random access channel resource from a random access channel resource set; sending, by the user equipment, the random access preamble by using the random access channel resource; and receiving, by the user equipment, a random access response message on a first downlink bandwidth part; wherein at least one of the random access preamble set or the random access channel resource set corresponds to the first downlink bandwidth part, and the random access channel resource includes at least one of a random access channel time domain resource or a random access channel frequency domain resource.

Abstract: A bandwidth part processing method includes receiving, by a terminal, a first information and a second information from a network device. The first information indicates that at least one default bandwidth part (BWP) corresponds to at least two active BWPs, the second information indicates that the at least two active BWPs correspond to at least one first timer, and the at least one first timer is useable by the terminal to perform deactivation processing on at least one of the at least two active BWPs. The method further includes performing, by the terminal, deactivation processing on the at least one of the at least two active BWPs, and activation processing on a BWP in the at least one default BWP based on the first and second information, or performing deactivation processing on the at least one of the at least two active BWPs based on the first and second information.

Abstract: This application provides a communication method and a communications device. The method includes: A first device receives a first message sent by a second device. The first message is used to indicate a bearer configuration of a bearer of the first device and an initial status of the bearer configuration, and the bearer configuration includes a first bearer configuration and/or a second bearer configuration. The first device determines the bearer configuration and the initial status of the bearer configuration based on the first message. According to the technical solutions in embodiments of this application, a bearer configuration of a terminal device and an initial status of the bearer configuration of the terminal can be indicated.

Abstract: A radio bearer configuration method, an apparatus, and a system. The method includes: determining that a first sidelink radio bearer and a second sidelink radio bearer that are used during communication between the second terminal and a first terminal are associated with each other; and sending a first message to the first terminal, where the first message includes first indication information, and the first indication information is used to indicate that the first sidelink radio bearer is associated with the second sidelink radio bearer, where the first sidelink radio bearer is used by the first terminal to send first sidelink service data to the second terminal, and the second sidelink radio bearer is used by the second terminal to send a first radio link control RLC status report for the first sidelink service data to the first terminal.

Abstract: This application discloses a communications method and apparatus, to resolve a problem of a loss of terminal data related to a service requirement of one card of a dual-card terminal with only one transmit chain when the other card of the terminal is in connected state. The method includes: when a first card is in connected state and a second card is in non-connected state, a communications apparatus determines that the second card may enter a connected state from a non-connected state.

Abstract: A paging method includes sending, by a terminal device, first indication information to a first network device in a first network, where the first indication information indicates that a first paging occasion (PO) needs to be updated, and receiving, by the terminal device, second indication information from the first network device, where the second indication information is used by the terminal device to determine a second PO.

Abstract: Embodiments of this application describe an inter-device communication method, a related device, and a system. The method includes a first device sending a first message. The first message includes one or more of the following parameters: a first parameter, a second parameter, and a third parameter. The first parameter is used to indicate that the first message is a message for announcing provision of an interactive business service. The second parameter is used to indicate an identifier corresponding to the interactive business service that can be provided by the first device. The third parameter is used to indicate a processing capability that can be provided by the first device for the interactive business service.

Abstract: This application discloses a communication method and a related product. The method includes: sending a first message, where the first message includes a first link configuration parameter, and the first link configuration parameter is used to establish a first link; and receiving a first acknowledgement message sent by a second user terminal, where the first acknowledgement message is used to indicate that the second user terminal completes establishment of the first link to the first user terminal.

Abstract: This application relates to a method for reporting UDC information by UE, and a device. The method includes: A terminal device receives request information sent by a network device, where the request information is used to request the terminal device to report first information; and the terminal device sends the first information to the network device, where the first information is used to indicate that the terminal device supports a UDC capability, and indicate a maximum quantity of DRBs that can be simultaneously supported by the terminal device and for which UDC is activated.

Abstract: A communication method includes that a first device deletes a first data packet. The first device sends first signaling to a second device, where the first signaling includes or indicates a first buffer, the first buffer is used to compress a second data packet or used to decompress a compressed second data packet, a serial number of the first data packet and a serial number of the second data packet are consecutive, the serial number of the second data packet follows the serial number of the first data packet, and the second device is a receiving device of the compressed second data packet.

Abstract: A no-gap measurement capability reporting method includes receiving, by a first device, a first message from a second device, where the first message instructs the first device to determine a gap measurement; and sending, by the first device, a second message to the second device based on the first message, where the second message indicates a no-gap measurement capability.

Abstract: A communication method includes a first device configuring a plurality of buffers to compress data packets. Each of the plurality of buffers is used to compress one or more data packets for transmission. If a compressed data packet is lost during transmission, a receive end cannot decompress a data packet corresponding to a same buffer as the lost data packet, but the receive end can continue to decompress a data packet that does not correspond to the same buffer as the lost data packet.

Abstract: A data processing method, including determining, by a second device, in response to a first device switching from the second device to a third device, data receiving status information of the first device, and reporting, by the second device, the data receiving status information of the first device, where the data receiving status information instructs a fourth device to send data to the first device according to the data receiving status information.

Abstract: A radio bearer configuration method, an apparatus, and a system. The method includes: determining that a first sidelink radio bearer and a second sidelink radio bearer that are used during communication between the second terminal and a first terminal are associated with each other; and sending a first message to the first terminal, where the first message includes first indication information, and the first indication information is used to indicate that the first sidelink radio bearer is associated with the second sidelink radio bearer, where the first sidelink radio bearer is used by the first terminal to send first sidelink service data to the second terminal, and the second sidelink radio bearer is used by the second terminal to send a first radio link control RLC status report for the first sidelink service data to the first terminal.

Abstract: This application provides a data processing method and apparatus, and a computer storage medium. When a PDCP entity over a UM DRB is re-established, or when a cell handover occurs and the PDCP entity over a UM DRB uses a key used before the handover, the PDCP entity determines a first SDU, where the first SDU is an SDU that is associated with a sequence number by the PDCP entity but whose corresponding data has not been transmitted through an air interface; and delivers a PDU corresponding to the first SDU to an RLC entity. Data corresponding to the first SDU is redelivered, to avoid a data packet loss caused by preprocessing of the PDCP entity.

Abstract: This application provides a pending SR cancellation method and an apparatus. In the method, when a specific condition is met, a terminal cancels a pending SR triggered by an uplink BSR, and when some other conditions are met, the terminal cancels a pending SR triggered by a sidelink BSR. In other words, the terminal may independently cancel the SR triggered by the uplink BSR and the SR triggered by the sidelink BSR. When canceling the SR triggered by the uplink BSR, the terminal may not cancel the SR triggered by the sidelink BSR, so that when sidelink data has a relatively high latency requirement.

Abstract: A reference signal measurement method includes determining, by a terminal device, that the terminal device meets a first condition for performing measurement, and measuring, by the terminal device, a reference signal based on measurement information that is in the at least one piece of measurement information and that is corresponding to the first condition, where each piece of measurement information in the at least one piece of measurement information indicates a to-be-measured reference signal and corresponds to one or more conditions.

Abstract: A method includes: determining, by a terminal device, first assistance information, wherein the first assistance information is used to indicate a configuration parameter requested by the terminal device from a first network device; and sending, by the terminal device, the first assistance information to a second network device, wherein the second network device is used to send the first assistance information to the first network device.

Abstract: A timer control method includes a receiving device that performs re-establishment or data recovery on a Packet Data Convergence Protocol (PDCP) layer of the receiving device. The PDCP layer stops the running of a reordering timer of the PDCP layer when the reordering timer is in a running state, where the reordering timer enables the PDCP layer to wait to receive a lost data packet. Because the reordering timer is stopped from running rather than expires, the PDCP layer does not update a value of RX_DELIV.

Abstract: A method includes: determining, by a terminal device, that assistance information of the terminal device can be sent to a first network device through a signaling radio bearer (SRB)3, wherein the terminal device is connected to at least two network devices, and the first network device is a secondary network device in the at least two network devices; and sending, by the terminal device, the assistance information to the first network device through the SRB3, wherein the assistance information is used to indicate a configuration expected by the terminal device or service information of the terminal device.