Abstract: This application provides a method, includes: a first network node sends an inactivity timer of a terminal device to a second network node, the first network node receives an inactive state indication of the terminal device from the second network node, wherein the inactive state indication of the terminal device is used by the first network node to determine whether the terminal device to enter an inactive state, the first network node notifies the second network node that the terminal device enters the inactive state.

Abstract: This application provides a communications method and a communications apparatus, to reduce storage resources required by an access network device to store a context of a terminal device. The method includes: The access network device gathers terminal devices that have a same attribute in a group, where a context of each terminal device is divided into two parts: a common context and a dedicated context, the common context is shared by all the terminal devices in the group, and the dedicated context is a context specific to the terminal device. The access network device stores one common context for each group and stores a dedicated context of each terminal device in the group, to maintain the context of each terminal device.

Abstract: A communication method and apparatus, the method including receiving, by a first access network device, a first message from a terminal in a radio resource control (RRC) inactive state, where the first message requests to resume an RRC connection or to perform a radio access network-based notification area update (RNAU), and sending, by the first access network device, a first request message to a second access network device, where the first request message includes a cell radio network temporary identifier allocated by the first access network device for the terminal, and the second access network device is an access network device that retains a context of the terminal, and there is a control plane link of the terminal between the second access network device and a core network.

Abstract: Embodiments of this application provide a data transmission method and device. The method includes: obtaining, by a first access network device, a first message from a second access network device, where the first message requests context information of a terminal device; and sending, by the first access network device, a data packet to the second access network device. The first access network device is a corresponding access network device of the terminal device before the re-establishment procedure, and the second access network device is a corresponding access network device when the terminal device initiates the re-establishment procedure.

Abstract: A system information obtaining and sending method and a related apparatus are disclosed. A terminal receives configuration indication information sent by a network device, where the configuration indication information includes RACH preamble configuration information corresponding to first system information; and the terminal sends a first request message used to obtain the first system information, to the network device according to the RACH preamble configuration information corresponding to the first system information, so that the RACH preamble configuration information is reused in the first request message.

Abstract: Embodiments of this application relate to the field of communications technologies and disclose a communication method and a device. The method includes: determining an offset based on a first quantity, wherein the first quantity is a quantity of beams that are used to determine signal quality of a first cell; and determining the signal quality of the first cell based on the offset.

Abstract: This application discloses a radio resource measurement method, a radio resource selection method, and an apparatus. A terminal obtains a measurement result of a beam; and the terminal sends, to a network device, first indication information used to instruct to deactivate or delete a beam, where the beam satisfies a first quality condition. In addition, the terminal may further obtain a measurement result of the beam, and send, to the network device, second indication information used to instruct to activate or add the beam, to instruct the network device to activate or add a beam having relatively good communication quality, for communication with the terminal.

Abstract: Embodiments of this application provide a communication method and a communications apparatus. The method includes: generating a log record, where the log record is recorded by performing MDT log measurement when a terminal is in an inactive state; and when the terminal is in a connected state, sending the generated log record to a network device.

Abstract: Embodiments of this application provide a communication method, a communications apparatus, and a storage medium. The communication method includes: sending, by a new master network device, a request to an original master network device, to request context information of a terminal device on the original master network device and an original secondary network device; and receiving the context information of the terminal device on the original master network device and the original secondary network device from the original master network device. This application can effectively simplify implementation steps of resuming a multi-connectivity mode by the terminal device, reduce signaling procedures, and shorten a delay, thereby improving network transmission efficiency.

Abstract: Embodiments of this application disclose an access control method, a communications device, and a base station, so that a UE determines, based on a UAC parameter determined based on a CE-level, whether access of the UE is barred, so that a probability that a UE with a large resource consumption amount accesses a communications network system can be controlled. The method in the embodiments of this application includes: determining, by user equipment UE based on a first coverage enhancement level CE-level, a first unified access control UAC parameter corresponding to the first CE-level; and determining, by the UE based on the first UAC parameter, whether access of the UE is barred.

Abstract: Embodiments of this application relate to the field of communications technologies and disclose a communication method and a device. The method includes: obtaining, by an apparatus, signal quality of at least one beam in a cell; and determining, by the apparatus, the highest signal quality of a beam in the at least one beam as signal quality of the cell in a case that the highest signal quality of the at least one beam below a preset threshold.

Abstract: This application discloses a communication method and a communications apparatus, and relates to the communications field, to reduce power consumption of a terminal. The communication method includes: determining, by a first network device, first information, where the first information includes type information of a synchronization signal block, and the type information of the synchronization signal block is used to indicate that the synchronization signal block is a cell-defined synchronization signal block or a non-cell-defined synchronization signal block; and sending, by the first network device, the first information to a second network device. Embodiments of this application are applied to an indication of the cell-defined or non-cell-defined synchronization signal block.

Abstract: A communication method and a communications apparatus, the method including receiving, by a second network device, from a third network device, first identification information of a first radio access network area to which a first cell corresponding to the third network device belongs, and sending, by the second network device, second identification information of the first cell and the first identification information of the first radio access network area to a first network device.

Abstract: The present disclosure relates to communication methods and communications apparatus. One example method includes receiving a first message that is sent by a terminal through an access network device and that includes a first identifier, where the first identifier is used to indicate a message type of the first message, and the message type corresponds to a control plane entity type, and determining the control plane entity type to receive the first message based on the first identifier.

Abstract: This application relates to the field of communications technologies, and discloses a communication method and a communications apparatus, to resolve a service delay caused because uplink data cannot be directly sent. The method in this application includes: receiving a first message from a first access network device; then releasing or suspending a configured dedicated signaling radio bearer SRB and resetting protocol entities corresponding to a configured data radio bearer DRB, where the first message is used to indicate a terminal to enter a radio resource control RRC inactive state, and the first message carries an identifier of the terminal in the radio resource control RRC inactive state and radio access network notification area RNA information.

Abstract: Embodiments of this application provide a communication method and a communications system. The method includes: receiving, by a second network device from a first network device, information used to indicate that a terminal initiates a radio access network notification area update (RNAU), generating, by the second network device based on the information, a radio resource control release message on which security protection has been performed, and sending, to the first network device, the radio resource control release message on which the security protection has been performed.

Abstract: A method and system for mobility latency reduction in a hierarchical NR architecture is provided. In an embodiment, a method in a network component for handover of a UE includes configuring, by the network component, at least one TRP determined according to UE mobility information. The configuring the at least one target TRP is performed prior to the UE moving into a border area between the at least one target TRP and a first serving TRP. Configuring the at least one target TRP results in the at least one target TRP being configured to act as a secondary serving TRP to the UE. The method also includes configuring at least one target TRP and the UE with corresponding dedicated access resource and monitoring opportunities. The method also includes activating a connection and data communication between the UE and the at least one pre-configured secondary serving TRP.

Abstract: This application provides a transmission mode switching method and an apparatus. When UE is in a connected state, if an uplink service volume of the UE within a first detection time is less than a first threshold, the UE switches a state from the connected state to an ecology conservation optimization; or switches, in the connected state, a transmission mode from an uplink scheduling-based transmission mode to an uplink contention-based transmission mode.

Abstract: Example communication methods and apparatus are described. One example communication method includes receiving indication information by a terminal device from a network device, where the indication information is used to indicate resource configuration information of a first uplink carrier and/or a second uplink carrier. The first uplink carrier and the second uplink carrier are different uplink carriers in a cell of the network device, and the first uplink carrier and the second uplink carrier are corresponding to one downlink carrier in the cell. The terminal device determines one uplink carrier from the at least one uplink carrier as a target carrier for performing random access based on the resource configuration information of the at least one uplink carrier.

Abstract: This application provides a connection resume request method and an apparatus to avoid key asynchronization between a terminal and a source base station in the scenario that a target base station rejects resuming of a RRC connection of the terminal including: generating, by a terminal, a new access stratum key; sending, by the terminal to a target base station, a connection resume request message requesting to resume a radio resource control (RRC) connection; receiving, by the terminal, a connection resume rejection message from the target base station, wherein the connection resume rejection message indicates that the resuming of the RRC connection that is rejected; and resuming, by the terminal, the new access stratum key to a previous access stratum key, wherein the previous access stratum key is an access stratum key that is used, before the apparatus enters an inactive state, by the terminal and the source base station.