Abstract: A paging method includes: determining, by an access network device or a core network device, a paging cycle based on type information of a terminal, and sending first information based on the paging cycle, where the first information is used to page the terminal. The paging cycle is determined as 2.56 s according to the type information indicating that the terminal is REDCAP UE, so that the REDCAP UE can perform monitoring in the paging cycle of 2.56 s, receive emergency broadcast in time, and obtain energy saving gains. In some situations, a paging method includes receiving first information comprising information of a paging cycle for a terminal, and determining, according to type information of a camped cell on which the terminal is currently camped, whether to use PTW in monitoring paging in accordance with the first information.

Abstract: This application provides a cell selection method and apparatus, to resolve abnormal wireless communication between a terminal device and a selected cell. The method includes: A terminal device may obtain a first offset of at least one first to-be-selected cell. The first offset is used to determine a cell selection parameter of the at least one first to-be-selected cell. The cell selection parameter includes a cell selection receive level value Srxlev and/or a cell selection receive quality value Squal. Next, the terminal device may determine, based on uplink capability as to whether the terminal device can perform uplink enhancement, the cell selection parameter of the at least one first to-be-selected cell by using the first offset. Then, the terminal device may determine a first cell from the at least one first to-be-selected cell based on the cell selection parameter.

Abstract: A transmission parameter obtaining method includes obtaining, by a terminal device, a transmission parameter of a network device, wherein the transmission parameter indicates location information of the network device. The method also includes determining, by the terminal device, at least one of an intra-frequency cell-reselection measurement threshold or an inter-frequency cell-reselection measurement threshold based on the transmission parameter. The method further includes determining, by the terminal device, a radio link failure threshold based on the transmission parameter. The method additionally includes determining, by the terminal device, at least one of an intra-frequency connected-state measurement threshold or an inter-frequency connected-state measurement threshold based on the transmission parameter.

Abstract: This application provides a signaling transmission method and an apparatus, to improve signaling transmission efficiency. The method includes: A first terminal device resumes at least one dedicated signaling radio bearer based on a stored context, where the first terminal device is in an inactive state; and the first terminal device sends a first message to a first radio access network device, where the first message includes first non-access stratum NAS signaling sent by the first terminal device to a core network device, and the first NAS signaling is carried in one of the at least one dedicated signaling radio bearer.

Abstract: Embodiments of this application provide an access method and a device, and relate to the field of communication technologies. A terminal device obtains a transmission parameter between the terminal device and an access network device; and the terminal device accesses the access network device when determining, based on the transmission parameter and reference information, that a preset condition is satisfied. The reference information includes a threshold corresponding to the transmission parameter. Embodiments of this application are used for communication access.

Abstract: This application provides a data transmission method and apparatus. The method includes: receiving downlink data, where the downlink data is used to be sent to a terminal device; receiving first information from a second network device, where the first information is used to determine a time point for sending the downlink data to the second network device; and sending the downlink data to the second network device based on the first information, to avoid directly sending the downlink data to the second network device after receiving the downlink data, thereby relieving storage burden of the second network device.

Abstract: A communication method and apparatus. A terminal device determines, based on first information received from a first network device, that a second network device has first time information, where the first time information is time information having precision that is higher than precision of second time information of the first network device. The terminal device obtains the first time information of the second network device based on the first information. The terminal device obtains high-precision time information to improve communication reliability.

Abstract: A communication method includes receiving a first message from a first network device, and sending a second message to a terminal device. The first message includes random access related information. The second message indicates a first random access type that is usable in a random access procedure. The first random access type is a 2-step random access channel (RACH) or a 4-step RACH. The random access related information includes at least one of random access indication information useable to indicate the first random access type, random access capability information including information of a random access type supported by the terminal device, random access mode information useable to indicate a contention-based random access mode or contention-free random access mode in the random access procedure, an early downlink-data transmission indication useable to indicate to transmit a downlink data packet in the random access procedure, or a size of the downlink data packet.

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: This application relates to a measurement method and an apparatus. If determining that a terminal device meets a first measurement reporting condition, the terminal device sends first information to a network device. After receiving the first information, the network device sends second information to the terminal device, and the terminal device receives the second information from the network device, where the second information is used to indicate to enter a relaxed measurement state of a serving cell. For such a terminal device, frequent measurement of the serving cell is equivalent to an unnecessary measurement process, and causes high power consumption. Therefore, the network device may indicate such a terminal device to enter the relaxed measurement state of the serving cell, to reduce a measurement process of the serving cell, so as to save power.

Abstract: A measurement method including determining, by a terminal device, a first adjustment parameter of a to-be-measured neighboring cell, determining, based on the first adjustment parameter, a first synchronization signal block-based measurement timing configuration (SMTC) window corresponding to the to-be-measured neighboring cell, and measuring the to-be-measured neighboring cell based on the first SMTC window.

Abstract: A radio resource control (RRC) connection resume method includes receiving, by a first network device, an RRC connection resume request message from a terminal device. The RRC connection resume request message is used to request to resume an RRC connection of the terminal device. The method also includes sending a first message to a second network device. The first message includes auxiliary information. The auxiliary information includes at least one of information used by the terminal device to perform redirection or information used by the terminal device to perform cell reselection, or the auxiliary information indicates that the first network device cannot respond to the RRC connection resume request message of the terminal device. The method further includes receiving an RRC release message from the second network device. The method additionally includes sending the RRC release message to the terminal device.