Abstract: This application relates to the field of energy storage components, and in particular, to a protective plate, a battery unit assembly, a battery module group, and a vehicle. The protective plate is provided with a guide groove. The protective plate is configured to shield an explosion-proof valve of a battery cell. The guide groove is configured to be disposed corresponding to the explosion-proof valve, and is configured to guide a flow direction of a flame ejected from the explosion-proof valve. In this application, the guide groove is disposed on the protective plate to guide the flame to a direction away from passengers, thereby protecting the passengers from injury.

Abstract: This application provides a data transmission method, an access network device, and a terminal. The method includes: receiving, by a first terminal, first instruction information from a first access network device, where the first terminal accesses the first access network device, and the first instruction information is used to trigger the first terminal to connect to a second terminal; connecting, by the first terminal, to the second terminal based on the first instruction information; and performing, by the first terminal, data transmission with a second access network device by using the second terminal, where the second access network device is configured to transmit data between the first access network device and the first terminal. In this way, the first access network device and the second access network device can both provide a data transmission service for the first terminal, thereby improving communication quality of the first terminal.

Abstract: This application discloses a network access method, a network device, and a terminal. The method includes: obtaining, by a network device, indication information, where the indication information is used to indicate whether the terminal supports air communication; and when the indication information indicates that the terminal supports the air communication, determining, by the network device, that the terminal is allowed to access a network in which the network device is located. In this application, a quantity of unmanned aerial vehicle terminals that access the network can be limited, reducing interference caused by the unmanned aerial vehicle terminals to another terminal in the same network as the unmanned aerial vehicle terminals, and improving communication quality of the another terminal.

Abstract: A transmission method is implemented by a communications device including a first functional entity and a second functional entity. A first carrier is configured for the first functional entity, and a second carrier is configured for the second functional entity. The second functional entity obtains first information, where the first information is first control information of the first functional entity, or is the first control information and second control information of the second functional entity, the first control information includes a first identifier, and the first identifier is used to indicate the first carrier; and the second functional entity sends the first information by using the second carrier.

Abstract: Embodiments of the present invention relate to communications technologies, and provide a data transmission method and an apparatus. The method includes: sending, by a base station, a grouping instruction to a target terminal, where the grouping instruction is used to group, in a preset grouping manner, terminals in a cell in which the target terminal is located into N groups, totally or partially different resources are allocated to terminals in different groups of the N groups, and a resource corresponding to an ith group of the N groups is used by a terminal in the ith group in uplink non-scheduled transmission; and receiving data that is sent by the target terminal using a target resource. In the solutions, terminals in a cell are grouped, and terminals in a same group contend for a resource allocated to the group. This mitigates resource collision when an uplink non-scheduled transmission solution is used.

Abstract: A method includes obtaining, by a network device, scheduling time information of at least one beam, where the scheduling time information of the at least one beam includes scheduling time information of a first beam currently accessed by a terminal, and is used to instruct the terminal to receive or send a signal at a scheduling time indicated by the scheduling time information of the at least one beam; and sending, by the network device, first indication information to the terminal, where the first indication information is used to indicate the scheduling time information of the at least one beam.

Abstract: Embodiments of this application provide a data sending method, a data receiving method, and a device. In the data sending method, a receive end device performs a DRX operation at a low frequency based on a DRX parameter; and receives, in a time indicated by the DRX parameter, first indication information sent by a transmit end device, where the first indication information is used to instruct the receive end device to prepare to receive data at a high frequency. In this process, the receive end device performs the DRX operation only at the low frequency, and starts beam tracking only after receiving the first indication information that instructs the receive end device to receive the data at the high frequency, to avoid unnecessary beam tracking and save power of the receive end device.

Abstract: The embodiments of the present disclosure disclose a small data transmission method and a related device and system. The method may include: broadcasting, by a base station, a paging message, where the paging message carries UE identifiers of a plurality of to-be-paged user equipment UE and small data sent to at least one of the to-be-paged UEs, and the small data is data whose data volume is less than a preset data volume threshold. In the present disclosure, small data may be sent to to-be-paged UE while the base station pages the UE, to reduce signaling and time overheads for sending the small data and improving communication efficiency.

Abstract: In a data transmission method, a terminal can determine, based on the transmission resource occupation status information broadcast by the base station, the transmission resource unit used to send the first data packet. This avoids a problem in a non-scheduled solution that a terminal does not know transmission resource occupation status information, and sends a first data packet by using a transmission resource unit that cannot be used to transmit a data packet; and reduces a latency for sending a data packet.

Abstract: Embodiments of the present invention provide a communication method and a device. A network controller receives a first message sent by a first access network device, where the first message is used to request the network controller to configure at least one access network device for first user equipment, to implement data transmission or reception between the first user equipment and the at least one access network device; the network controller configures a second access network device for the first user equipment.

Abstract: Embodiments of the present application provide a data transmission method, a device, and a system, and relate to the communications field, to reduce signaling exchanges between an access network device and a UE, thereby saving network resources and improving data transmission efficiency. The data transmission method includes: receiving, by a user equipment UE, a scrambled control channel; descrambling, by the UE, the scrambled control channel by using a first identifier, to obtain control information and cyclic redundancy code CRC; and after the UE completes a check on the CRC, receiving, by the UE according to the control information, data sent by an access network device.

Abstract: This application relates to the communications field, and in particular, to a data transmission method, an apparatus, and a system. In the data transmission method, a base station determines a transmission policy, where the transmission policy is used for contention-based uplink data transmission or non-contention based uplink data transmission; and sends the transmission policy to a terminal. The terminal receives the transmission policy sent by the base station, and sends uplink data to the base station based on the transmission policy. With a solution in this application, the base station can determine an appropriate transmission policy based on a network status, and send the transmission policy to the terminal, and the terminal can use, based on the transmission policy, an appropriate transmission mode to send uplink data to the base station, so that transmission efficiency is improved.

Abstract: This application provides a data transmission method, an access network device, and a terminal. The method includes: receiving, by a first terminal, first instruction information from a first access network device, where the first terminal accesses the first access network device, and the first instruction information is used to trigger the first terminal to connect to a second terminal; connecting, by the first terminal, to the second terminal based on the first instruction information; and performing, by the first terminal, data transmission with a second access network device by using the second terminal, where the second access network device is configured to transmit data between the first access network device and the first terminal. In this way, the first access network device and the second access network device can both provide a data transmission service for the first terminal, thereby improving communication quality of the first terminal.

Abstract: This application discloses a network access method, a network device, and a terminal. The method includes: obtaining, by a network device, indication information, where the indication information is used to indicate whether the terminal supports air communication; and when the indication information indicates that the terminal supports the air communication, determining, by the network device, that the terminal is allowed to access a network in which the network device is located. In this application, a quantity of unmanned aerial vehicle terminals that access the network can be limited, reducing interference caused by the unmanned aerial vehicle terminals to another terminal in the same network as the unmanned aerial vehicle terminals, and improving communication quality of the another terminal.

Abstract: The present disclosure provides an uplink data packet transmission method. The method includes: determining, by a terminal device, a CP length of a first uplink data frame; if the terminal device is in a state of out of uplink synchronization with a base station and in an RRC connected state, or is in an RRC idle state, generating the first uplink data frame for an uplink data packet according to the CP length and sending the first uplink data frame to the base station. The CP length is greater than a CP length of an uplink data frame sent by a terminal device that is in a state of uplink synchronization and in an RRC connected state. Therefore, signaling procedures such as random access and uplink synchronization can be omitted, so that the terminal device can directly send the uplink data packet by performing signaling exchange once.

Abstract: An embodiment of the present application discloses a control information sending method. The method includes: determining, by a base station, a first resource on a first network, where the first resource is located in a first scheduling resource time granularity of the first network; and sending, by the base station, downlink control information of a second network to a terminal on the first resource, where the downlink control information sent on the first resource is used to schedule a resource in a first scheduling resource time granularity of the second network, and a length of a scheduling resource time granularity of the first network is different from a length of a scheduling resource time granularity of the second network. According to the method, control information of the second network can be transmitted reliably.

Abstract: Embodiments of this application provide a data sending method, a data receiving method, and a device. In the data sending method, a receive end device performs a DRX operation at a low frequency based on a DRX parameter; and receives, in a time indicated by the DRX parameter, first indication information sent by a transmit end device, where the first indication information is used to instruct the receive end device to prepare to receive data at a high frequency. In this process, the receive end device performs the DRX operation only at the low frequency, and starts beam tracking only after receiving the first indication information that instructs the receive end device to receive the data at the high frequency, to avoid unnecessary beam tracking and save power of the receive end device.

Abstract: Embodiments of the present disclosure provide a resource allocation information indication method, a base station, a user equipment, and a system. In technical solutions of the embodiments in accordance with the present disclosure, a base station generates and sends downlink control information that includes public resource allocation indication information to a UE, and the public resource allocation indication information is used to indicate resources allocated to multiple UEs. The UE obtains information about allocated resources according to the public resource allocation indication information. Therefore, a quantity of resources occupied by a resource allocation indicator is reduced, a quantity of resources occupied by entire DCI is reduced, and system signaling overheads are reduced. Particularly, when the method is applied to a short-subframe service scenario, signaling overheads are further reduced and system performance is improved.

Abstract: A method includes obtaining, by a network device, scheduling time information of at least one beam, where the scheduling time information of the at least one beam includes scheduling time information of a first beam currently accessed by a terminal, and is used to instruct the terminal to receive or send a signal at a scheduling time indicated by the scheduling time information of the at least one beam; and sending, by the network device, first indication information to the terminal, where the first indication information is used to indicate the scheduling time information of the at least one beam.

Abstract: A downlink emergency service transmission method and a system, where the method includes reserving, by a base station from system resource, resource as reserved resource for transmitting a downlink emergency service, sending, by the base station, first indication information to user equipment, so as to instruct the user equipment to receive a downlink emergency service by using a resource indicated by the first indication information, where the first indication information is used to indicate the reserved resource, and sending, by the base station, the downlink emergency service to the user equipment by using the reserved resource.