Abstract: A terminal device obtains first subgroup configuration information corresponding to a first PLMN, and receives paging from a first cell based on the first subgroup configuration information. The first PLMN is a PLMN associated with the terminal device, the first PLMN belongs to a PLMN set, and the PLMN set is associated with the first cell. Subgroup configuration information may be considered as configuration information for grouping terminal devices, and a terminal device may determine, based on the subgroup configuration information, a terminal device group to which the terminal device belongs.

Abstract: A communication method includes receiving, by a first terminal device, configuration information of at least one reference signal. The communication method also includes sending, by the first terminal device, the at least one reference signal based on the configuration information. The first terminal device does not receive or send at least one of a non-access stratum (NAS) message, a transmission long term evolution positioning protocol (LPP) message, connected mode information, or a paging message.

Abstract: This application provides a communication method and apparatus to improve communication performance of a novel terminal device. The method includes: receiving a first message from a source access network device, and determining a capability of a first cell based on the first message, where the first message indicates to hand over a first terminal device to the first cell, the first cell corresponds to a target access network device, and the capability of the first cell is whether the first cell supports serving a terminal device with a reduced capability; and determining, based on the capability of the first cell, whether to access the first cell.

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: This application relates to a discontinuous reception method. In the first time unit, for example, the first symbol, after a hybrid automatic repeat request HARQ feedback occasion of a sidelink HARQ process, a first terminal may start a drx-HARQ-RTT-TimerSL and start a drx-RetransmissionTimerSL when the drx-HARQ-RTT-TimerSL expires. During running of the drx-RetransmissionTimerSL, the first terminal monitors a physical downlink control channel. In this way, sidelink retransmission efficiency can be improved, an increase of a sidelink retransmission delay can be avoided, and sidelink-based applications, such as unmanned driving, automatic driving, assisted driving, intelligent driving, networked driving, intelligent networked driving, and car sharing in the field of artificial intelligence can be better supported.

Abstract: A communication method and apparatus are provided. The method includes: a first terminal apparatus sends first information to a network device, where the first information is used to request a transmission resource, where the transmission resource is used by a second terminal apparatus and/or the first terminal apparatus for transmission, and the second terminal apparatus and the first terminal apparatus belong to a same terminal apparatus group.

Abstract: A communication method, including: A terminal device receives a master information block MIB, where the MIB includes first indication information and second indication information, the first indication information indicates whether a cell is barred, and the second indication information indicates whether an intra-frequency reselection operation is allowed. When the first indication information indicates that the cell is barred, the terminal device determines, based on the second indication information, whether to perform the intra-frequency reselection operation. The terminal device is reduced capability user equipment RedCap UE. Based on this technical solution, the RedCap UE can use different IFRIs when the cell is barred, to improve efficiency of the terminal device to determine to perform a cell reselection operation.

Abstract: A first base station determines that a first terminal in a first cell is handed over to a second cell, where the first terminal belongs to a group of terminals, and the first cell belongs to the first base station. The first base station sends first information to the first terminal, where the first information indicates a first sidelink resource used by the group of terminals to perform communication, and the first sidelink resource is valid in both the first cell and the second cell. The foregoing technical solution resolves a problem that is of communications resource configuration of a group of terminals and that exists when the group of terminals perform handover.

Abstract: A communication processing method, a communication processing apparatus, and a system, to improve resource utilization. A first terminal device generates first information. The first terminal device sends the first information to a network device, where the first information is used to indicate any one or more of the following content: information indicating that the first terminal device releases a first resource; the first resource released by the first terminal device; and information indicating that the first terminal device requests a second resource from the network device.

Abstract: A random access method, including receiving, by a terminal device, a synchronization signal and physical broadcast channel block (SSB), determining, by the terminal device, a frequency domain position of a random access occasion based on a frequency domain position of the SSB, and initiating, by the terminal device, random access based on the random access occasion, where the random access occasion comprises a frequency domain resource determined based on the frequency domain position of the random access occasion.

Abstract: A communication method includes: when a network device meets an enabling condition, sending, by the network device, configuration information to a terminal, where the configuration information includes at least one of a type of indication information, a form of the indication information, or a receiving location of the indication information; and sending the indication information to the terminal, where the indication information is used to indicate the terminal whether to monitor a physical downlink control channel PDCCH, or indicate the terminal to monitor a PDCCH, or indicate the terminal not to monitor a PDCCH; or the indication information is used to indicate the terminal whether to receive a physical downlink shared channel PDSCH, or indicate the terminal to receive a PDSCH, or indicate the terminal not to receive a PDSCH. This improves flexibility of using the indication information (for example, a UPSS) by the terminal.

Abstract: Embodiments of the present invention provide a data transmission method and an apparatus, and relate to the field of communications technologies. The method includes: obtaining, by a terminal, first indication information of an uplink resource used for sending uplink data or uplink control information. The first indication information of the uplink resource includes information used to indicate whether the uplink resource is a type 1 uplink resource or a type 2 uplink resource. The type 1 uplink resource includes at least one subcarrier in a frequency domain, where when a subcarrier quantity of subcarriers is greater than or equal to 2, the subcarriers are orthogonal to each other, and a subcarrier spacing is 3.75 kHz; or the type 1 uplink resource includes at least one sub-channel in a frequency domain, where a bandwidth of each sub-channel is approximately 3.75 kHz.

Abstract: Embodiments of the application provide a sidelink logical channel multiplexing method and apparatus. After determining a first sidelink logical channel (SL LCH) that meets a first preset condition in at least one SL LCH, a terminal allocates a resource to data of the first SL LCH. Then, when a remaining resource of transmission resources is more than zero, the terminal determines, according to a communication range of the first SL LCH, a second SL LCH that meets a second preset condition, and allocates a resource to data of the second SL LCH. The first SL LCH and the second SL LCH are different. In the method, such a parameter as a communication range is considered in a multiplexing process, and data of SL LCHs with same or different communication ranges is multiplexed into a same transport block.

Abstract: Terminal apparatus identification methods and apparatuses are described. An access stratum (AS) of a first communications apparatus sends first information to an AS of a second communications apparatus. The AS of the second terminal apparatus may identify a leader terminal apparatus based on the first information, so as to implement perception of the leader terminal.

Abstract: In a communication method, a first user equipment sends first data to second user equipment over a sidelink (SL); and if the first user equipment does not receive first feedback information, the first user equipment initializes a first counter, or keeps a count value of the first counter unchanged, where the first feedback information indicates whether the second user equipment successfully receives the first data and the first counter is used for RLF detection.

Abstract: Embodiments of this application provide a resource preemption method, an apparatus, and a system, to reduce a quantity of times of frequent resource preemption, and improve resource security. In one example, a first terminal device obtains a first time interval and a second time interval, and preempts or determines not to preempt a first resource according to a first preset rule. The first resource is a resource reserved by a second terminal device or a resource reserved for a first service to be transmitted by the first terminal device. The first time interval is a time interval related to the first resource. The second time interval is used to indicate a preemption forbidden time. The first preset rule is determined based on the first time interval and the second time interval.

Abstract: A communication method includes indicating, by a first device to a second device, that the first device is configured in a first mode, wherein a current protocol version of the first device is incompatible with a current protocol version of the second device. The communication method further includes receiving, by the first device, protocol information from the second device, wherein the protocol information is useable by the first device to update the current protocol version of the first device. The communication method further includes updating, by the first device, the current protocol version of the first device based on the protocol information.

Abstract: This application provides a communication method and apparatus. The method includes: A terminal device receives configuration information from a network device, where the configuration information is used to configure a first carrier or a first carrier group. The terminal device may send first information to the network device, where the first information is used to request to suppress activation of the first carrier or the first carrier group.

Abstract: Embodiments of the present disclosure relate to the field of communications technologies, and in particular, to a communication method and a device. Second user equipment executes some tasks required for communication between first user equipment and a network device, and the first user equipment properly communicates with the second user equipment. In this way, energy consumption of the first user equipment required for communication with the network device can be reduced, thereby prolonging a standby time and improving user experience.

Abstract: This application relates to the field of communication technologies, and provides a sidelink transmission method and apparatus, to resolve a problem of reliability of sidelink multicast or broadcast data transmission. The method includes: determining, by a communication device, that at least one of the following conditions is met: a first timer corresponding to sidelink discontinuous reception DRX is not running, a second timer corresponding to DRX is not running, or a third timer corresponding to a first sidelink SL process is running; and scheduling, by the communication device, retransmission corresponding to the first SL process, where the first timer, the second timer, and the third timer may be timers related to DRX information, and the third timer may be further a timer related to the SL process.