Abstract: This application provides a data transmission method and an apparatus, and relates to the field of communication technologies. One example data transmission method includes: receiving scheduling information from a first communication apparatus; determining transmission indication information based on the scheduling information; receiving, based on the scheduling information, a first transport block from the first communication apparatus, and determining first hybrid automatic repeat request (HARQ) information of the first transport block; and determining a first HARQ process based on the first HARQ information and the transmission indication information, and allocating the first transport block to the first HARQ process.

Abstract: A communication method and a communications apparatus, the method including determining a first determining result when a first physical uplink channel and a second physical uplink channel overlap in time domain, where the first determining result includes a determining result about whether first data is intended to be sent, the first physical uplink channel includes a dynamic grant physical uplink channel, and the second physical uplink channel includes a configured grant physical uplink channel, and determining, in the first physical uplink channel and the second physical uplink channel based on the first determining result, a target physical uplink channel that is intended to be sent.

Abstract: The method includes: obtaining, by UE, UE capability information of the UE; if the size of the UE capability information exceeds the maximum tolerance that can be processed by the PDCP layer of the UE, splitting the UE capability information into at least two pieces of part UE capability information, where each piece does not exceed the maximum tolerance that can be processed by the PDCP layer; and reporting at least one piece of part UE capability information to a network side device. According to this method, the UE capability information is split on a UE side, and reported to the network side device for a plurality of times.

Abstract: Embodiments of this application provide example communication methods and apparatuses. One example method includes receiving a paging message from a network device, where the paging message includes first information, and the first information is used to indicate a resource location of a public warning system message. The public warning system message is received based on the paging message.

Abstract: Paging methods and apparatuses applicable to a communication system are disclosed. One method includes: A network device sends first paging configuration information, where the first paging configuration information corresponds a first-type terminal device; and sends second paging configuration information, where the second paging configuration information corresponds to a second-type terminal device. A capability of the first-type terminal device is different from a capability of the second-type terminal device. The second-type terminal device receives the second paging configuration information; and receives paging downlink control information (DCI) based on the second paging configuration information.

Abstract: Embodiments of the present application provide a communication method, comprising: receiving, b a first access network device from a core network device, signaling destined for a terminal, wherein the terminal is in a radio resource control (RRC) inactive mode; sending a first paging message to a second access network device for paging the terminal, wherein the first access network device and the second access network device are in same paging area; and receiving, from the second access network device, first indication information indicating that the terminal has connected to the second access network device. In the embodiments of the present application, after receiving the signaling destined for the terminal from the core network device, the first access network device can learn the terminal has connected to the second access network device, and therefore performs proper subsequent processing.

Abstract: Embodiments of the present invention disclose a mobility management method, user equipment, and a base station. The mobility management method may include: receiving, by user equipment UE in a connected mode, a source identifier of the UE from a first base station, where the source identifier is used to uniquely identify the UE in the first base station; entering, by the UE, a low-overhead state after a low-overhead activation condition is satisfied, where in the low-overhead state, the UE stores a connection context of the UE in the connected mode, and camps on a cell according to a cell reselection criterion during movement; and reporting, by the UE when a first preset condition is satisfied, the source identifier to a second base station to which a second cell belongs, where the second cell is a serving cell on which the UE currently camps.

Abstract: This application provides a communication method and a communications device. The method includes: determining, by a terminal device, a cell in which a beam failure occurs; and sending, by the terminal device, first indication information to a network device, where the first indication information is used to indicate the cell in which the beam failure occurs.

Abstract: A data transmission method includes receiving first information. The first information is useable to indicate that a hybrid automatic repeat request (HARQ) function of a HARQ process associated with a first configured grant is enabled or disabled. The first configured grant is configured by radio resource control (RRC) signaling. The method further includes performing data transmission by the first configured grant based on the first information.

Abstract: A network device sends multicast configuration information to a terminal device, where the multicast configuration information corresponds to a first multicast service, the multicast configuration information includes first indication information, and the first indication information indicates that the terminal device sends first feedback information for the first multicast service. The terminal device receives the first multicast service based on the first multicast configuration information, and then sends the first feedback information corresponding to the first multicast service to the network device based on the first indication information in the first multicast configuration information. The feedback mechanism applies to a multicast transmission technology and improves transmission reliability of a multicast service.

Abstract: The present disclosure relates to communication methods and apparatus, which are particularly applied to a non-terrestrial network. In one example method, a terminal device determines a first duration, and determines a timing advance amount based on the first duration, where the timing advance amount is used for communication between the terminal device and a network device.

Abstract: This application provides a communication method and a related apparatus, which are applied to the multicast field, and in particular, relate to a multimedia broadcast multicast service MBMS. In this method, a terminal device receives, from a target base station to which the terminal device is handed over, at least one first data packet that is of a first service and that is sent in a transmission mode, and receives first indication information from the first base station. The terminal device sends a part of or all data packets in the at least one first data packet to an upper layer entity of the terminal device based on the first indication information.

Abstract: Embodiments of the present invention disclose a communication method, an apparatus, and a system. The communication method includes: receiving, by a terminal device, a context identifier sent by a second radio access network device, and sending, to a first radio access network device, a first message that includes the context identifier; receiving, by a core network device, a second message sent by the first radio access network device, and sending, to the second radio access network device, a message that includes the context identifier; and receiving, by the core network device, context information of the terminal device that is sent by the second radio access network device, and sending the context information to the first radio access network device. Therefore, communication between the first radio access network device and the second radio access network device is ensured, and working efficiency is improved.

Abstract: Embodiments of this application provide a paging method and a communication apparatus, relate to the communications field, and are particularly applicable to NTN communication. The method includes: receiving a first message from a first network device, where the first message includes discontinuous reception DRX cycle information, the DRX cycle information is determined based on signal coverage cycle information of a second network device, the DRX cycle information is used to configure a DRX cycle TUE used by the terminal device to receive the paging message, and the signal coverage cycle information indicates a signal coverage cycle of the second network device; and receiving a paging message from the second network device based on the DRX cycle information.

Abstract: Embodiments of this application disclose example multicast service transmission methods and apparatuses. One example method includes determining first configuration information, where the first configuration information indicates a terminal device to receive a first multicast service, and the first configuration information includes a cell identifier of a serving cell corresponding to the first multicast service, and one or more of an identifier of the first multicast service or a radio network temporary identifier (RNTI) corresponding to the first multicast service. The first configuration information is sent to the terminal device.

Abstract: This application provides a cell reselection method, a terminal device, and a network device. The terminal device may be a low-bandwidth terminal device, so that a time period for the terminal device to perform cell reselection is reduced, and power consumption of the terminal device is reduced. The method includes: The terminal device receives first indication information sent by the network device, where the first indication information indicates information about an initial bandwidth part of a first cell, the first cell is a neighboring cell of a second cell, and the second cell is a cell on which the terminal device currently camps. The terminal device determines, based on a type of the terminal device and the first indication information, whether to reselect to the first cell.

Abstract: A method and an apparatus are provided. The method includes: An access network device sends DCI for a paging message to a terminal device, where the DCI includes scheduling information for downlink data. The access network device further sends first indication information included in the paging message to the terminal device, wherein the first indication information indicates that first downlink data corresponds to the terminal device. Therefore, when determining that there is downlink data to arrive, the terminal device determines a time-frequency location of the downlink data based on the scheduling information that is for the downlink data and that is in the DCI, and then receives the downlink data at the time-frequency location. According to the method and the apparatus provided in this application, a small amount of downlink data is transmitted, resource utilization is improved, and power consumption of the terminal device is reduced.

Abstract: This application discloses a communication method and apparatus, where the method includes: A terminal device or a network device obtains a first identity of a first service, and determines a first paging occasion based on the first identity, where the first paging occasion is used by the terminal device to receive a first message, and the first message is used to page the terminal device. In this method, the first paging occasion is determined based on the first identity, so that the network device pages, on the first paging occasion, a plurality of terminal devices that need to receive data of the first service.

Abstract: A communication method and a device are provided. The method includes: Two thresholds are set on a terminal device side: a first threshold and a second threshold. A terminal device may determine a cause for a radio link failure RLF based on a value relationship between a measurement result of a radio signal and the two thresholds, and further may use different handling manners depending on different RLF causes. According to the foregoing method, the terminal device can more accurately locate the cause for the RLF, and perform corresponding handling, to quickly resume communication, meet a service requirement of an industrial scenario, and the like.

Abstract: The present application discloses methods and apparatus for resuming a radio access network (RAN) connection by an inactive terminal device. An example method disclosed herein includes the step of sending, by a terminal device, connection resumption request information to a first RAN element, where the first RAN element corresponds to the cell on which the terminal device currently camps and is a RAN element indicated by configuration information of a master cell used by the terminal device when in a connected state. The terminal device receives acknowledgement information sent by the first RAN element and resumes a connection to a second RAN element based on the acknowledgement information, where the second RAN element is a RAN element indicated by the configuration information of the secondary cell.