Abstract: Embodiments of the present application provide a communication method. The method is applied to a random access process and includes: receiving indication information sent by a network device, where the indication information includes at least one piece of the following information: access probability information of each of a plurality of carriers, access control information of at least one of the plurality of carriers, overload indication information of at least one of the plurality of carriers, power boost information of at least one of the plurality of carriers, and access indication information of one of the plurality of carriers; and determining, based on the indication information, one carrier from the plurality of carriers as a target carrier to perform random access.

Abstract: Embodiments of this application provide a data processing method and a related device, to effectively ensure that a terminal in the Narrowband Internet of Things can completely receive, after accessing a target base station, downlink data that is not completely received before handover or reselection, in other words, to effectively ensure that the downlink data of the terminal is not lost, thereby ensuring mobility of the terminal in connected mode. Technical solutions provided in the embodiments of this application are as follows: A core network device obtains a first indication message, where the first indication message is used to indicate that a terminal completes a cell change or a cell reselection. The core network device sends downlink data to a target base station, where the target base station is a base station to which the terminal is connected after completing the cell change or the cell reselection.

Abstract: Embodiments of this application provide a cell obtaining method and a terminal to reduce power consumption of the terminal. Technical solutions provided in the embodiments of this application are as follows: When a terminal is connected to a current source serving cell, the terminal obtains a first quality parameter of the current source serving cell; if the first quality parameter is less than a first preset threshold, the terminal determines a measurement cell set; the terminal measures each measurement cell in the measurement cell set to obtain each corresponding second quality parameter; and the terminal determines a target serving cell based on the second quality parameter.

Abstract: Embodiments can provide a transmission method and a wireless communications device. For achieving such, a multicast coverage level of a multicast service can be determined by a group communication application server. The multicast coverage level may be a coverage level used when a network device corresponding to the cell transmits the service in multicast mode. A multicast transmission indicator can be sent, by the group communication application server, to a network device of the multicast service through a BM-SC, an MME, and an MCE. The multicast coverage level indication information may correspond to the multicast coverage level.

Abstract: The method includes: A terminal device sends an access request to a cell to which the terminal device belongs, monitors a downlink control channel, and receives an access response message based on scheduling information on the downlink control channel, further, if the access response message carries a backoff access identifier, the terminal device determines the backoff parameter corresponding to the backoff access identifier in the access response message based on a correspondence that is pre-stored and that is between the backoff access identifier and a backoff parameter, the terminal device determines backoff duration based on the backoff parameter and an access resource interval period corresponding to the terminal device; and sends an access request to the cell after the backoff duration.

Abstract: The present disclosure provides a method and an apparatus for determining a transmission solution. The method includes: obtaining, by a base station, a transmission solution switching instruction of UE, where the transmission solution switching instruction of the UE is used to instruct to switch a transmission solution of the UE from user plane transmission to control plane transmission or from control plane transmission to user plane transmission, and configuring, by the base station, a switched-to transmission solution with the UE based on the transmission solution switching instruction. The base station obtains the transmission solution switching instruction by using statuses of the UE or a core network device, and configures the switched-to transmission solution with the UE, so that switching of the transmission solution of the UE is implemented, without a need of performing re-attach to the core network device and tracking area update by the UE.

Abstract: Embodiments of this application disclose a resource scheduling method, an access network device, and user equipment, to reduce a quantity of times of applying for an uplink resource by using a random access process, reduce additional signaling overheads brought to the user equipment, and reduce power consumption of the user equipment. The method part in the embodiments of this application includes: determining, by an access network device, a target time interval in which user equipment monitors a downlink control channel; and sending, by the access network device, uplink resource scheduling information to the user equipment by using the downlink control channel in the target time interval.

Abstract: Embodiments provide an Internet of Things transmission optimization method. The method includes: generating, by a receiver side device, first indication information when the receiver side device receives a last PDU sent by a transmitter side device, where the first indication information is indicates whether the receiver side device is to send a status report; and sending, by the receiver side device, the first indication information to the transmitter side device.

Abstract: A system information sending method is provided, to resolve a technical problem that UE may not receive a paging message when a DRX cycle is greater than an MP. A network device may separately set a modification period (namely, a first period) for first-type system information (which, for example, may include paging configuration information), to ensure that the first-type system information is not to be modified in the first period. For example, the first period may be greater than a DRX cycle. In this way, when a terminal device wakes up based on the DRX cycle, a time when the terminal device wakes up is still in the first period. The terminal device may normally receive a paging message indicating that the paging configuration information is to be modified, thereby obtaining new paging configuration information in time and avoiding missing a subsequent paging message.

Abstract: The present disclosure discloses a data scheduling method, including: obtaining, by a base station, capability information of user equipment (UE), where a moment of obtaining the capability information of the UE is prior to that of receiving, by the base station, radio resource control (RRC) connection establishment complete signaling that is sent by the UE to the base station; and allocating, by the base station, a data scheduling resource to the UE according to the capability information of the UE. By using embodiments of the present disclosure, resource utilization can be increased.

Abstract: This application relates to the field of wireless communications technologies, and in particular, to a system message transmission technology, so as to resolve a system message update problem of a terminal device with DRX cycle. This application provides a terminal device, including: a receiving module, configured to receive a first system message; and a processing module, configured to: obtain first indication information from the first system message, and update system messages other than the first system message according to the obtained first indication information, where the first system message is periodically sent, and occupies a fixed physical resource location. The first indication information is sent in the first system message instead of a paging message. The terminal device may update the system messages other than the first system message according to the indication information, thereby updating all system messages.

Abstract: A data sending method provided in embodiments of the present invention includes: receiving, by a MAC entity of a sending device, a MAC SDU sent by a PDCP entity of the sending device by using a logical channel; multiplexing, by the MAC entity of the sending device, the MAC SDU to generate a first MAC data packet; segmenting or concatenating, by the MAC entity of the sending device, the first MAC data packet to generate a second MAC data packet; adding, by the MAC entity of the sending device, a MAC header to the second MAC data packet to generate a MAC PDU; and sending, by the MAC entity of the sending device, the MAC PDU to a MAC entity of a receiving device by using a physical entity of the sending device and a physical entity of the receiving device.