a terminal provided with a first edge computing processor, wherein the first edge computing processor is configured to implement an edge computing function of the terminal, and the terminal supports a 5G-based relay communication technology from the terminal to the network; and

a lower-layer terminal device configured to send a data processing request to the terminal through a Sidelink connection established between the terminal and the lower-layer terminal device;

wherein 5G communication connection is supported by both the terminal and the lower-layer terminal device;

wherein the terminal is configured to receive the data processing request; process the data processing request through the first edge computing processor to obtain a first processed result; and send the first processed result through the Sidelink connection to the lower-layer terminal device; and

wherein the lower-layer terminal device is configured to receive the first processed result through the Sidelink connection;

wherein the lower-layer terminal device is configured to send report information to the terminal, the report information is configured to indicate that the lower-layer terminal device has an independent communication capability;

wherein the terminal is configured to receive the report information; and send a connection instruction to the lower-layer terminal device in response that the first edge computing processor cannot process the data processing request, in which the connection instruction is configured to instruct the lower-layer terminal device to establish an independent communication connection with an access network device, so that the access network device receives the data processing request.