Abstract: A data transmission method includes: receiving an uplink grant message from a network device, where the uplink grant message includes first information, and the first information corresponds to a plurality of transport block sizes; determining the plurality of transport block sizes based on the first information; determining, based on a size of to-be-sent data, a first transport block size from the plurality of transport block sizes; and sending the to-be-sent data to the network device based on the first transport block size.

Abstract: This application provides a communication method, a communications apparatus, and a system, to reduce a transmission delay of an emergency service. The method may include receiving an uplink grant. The method may also include determining, based on a time-domain position of an uplink grant resource indicated by the uplink grant, a first uplink grant resource used to transmit first service data. Furthermore, the method may include transmitting the first service data on the first uplink grant resource.

Abstract: A device for recognizing an application in a mobile terminal includes: a coprocessor, configured to identify an image obtained by a signal processing device to obtain a first image category, and determine a first application corresponding to the first image category; and a main processor, configured to receive an identifier of the first application from the coprocessor, and activate the first application or prompt a user to download the first application. The device can relatively accurately determine, based on an image from an image sensor, an application that the user may want to use, and activate the application.

Abstract: This application discloses an uplink control information transmission method. A terminal may determine, based on received first DCI, whether UCI triggered by the DCI is highly reliable UCI, and if the UCI is highly reliable UCI, design a special transmission policy for the UCI, to protect the UCI and ensure reliability of a URLLC service. In this application, the special transmission policy may be superior to a common UCI transmission policy in at least one of the following aspects: a transmission resource, a coding scheme, a sending sequence, and the like.

Abstract: This application provides an example vehicle to everything (V2X) communication method and an example V2X communications apparatus. According to the method, different transmission parameters can be selected for data packets corresponding to different services, ProSe per-packet priority (PPPP) of services, ProSe per-packet reliability (PPPR) of services, or quality of service flow identifiers (QFIs) based on service information of the data packets.

Abstract: A data transmission method includes: receiving an uplink grant message from a network device, where the uplink grant message includes first information, and the first information corresponds to a plurality of transport block sizes; determining the plurality of transport block sizes based on the first information; determining, based on a size of to-be-sent data, a first transport block size from the plurality of transport block sizes; and sending the to-be-sent data to the network device based on the first transport block size.

Abstract: This application provides a communication method, a communications apparatus, and a system, to reduce a transmission delay of an emergency service. The method may include receiving an uplink grant. The method may also include determining, based on a time-domain position of an uplink grant resource indicated by the uplink grant, a first uplink grant resource used to transmit first service data. Furthermore, the method may include transmitting the first service data on the first uplink grant resource.

Abstract: This application discloses an uplink control information transmission method. A terminal may determine, based on received first DCI, whether UCI triggered by the DCI is highly reliable UCI, and if the UCI is highly reliable UCI, design a special transmission policy for the UCI, to protect the UCI and ensure reliability of a URLLC service. In this application, the special transmission policy may be superior to a common UCI transmission policy in at least one of the following aspects: a transmission resource, a coding scheme, a sending sequence, and the like.