Apparatus and method for recommending federated learning based on tendency analysis of recognition model and method for federated learning in user terminal

A method for federated learning in a user terminal, comprising:

• receiving federated-learning group information from a server device;
• acquiring a weight of a recognition model of an additional user terminal included in the federated-learning group information;
• and
• performing federated learning for a recognition model using the acquired weight of the recognition model,
• wherein the additional user terminal included in the federated-learning group information is grouped according to a tendency of a recognition model trained using reinforcement learning by the user terminal.

A server device, comprising:

• memory in which at least one program is recorded;
• and
• a processor for executing the program,
• wherein the program performs
• analyzing a tendency of a recognition model trained using reinforcement learning by each of multiple user terminals,
• grouping the multiple user terminals according to the tendency of the recognition model, and
• transmitting federated-learning group information including information about other user terminals grouped together with at least one of the multiple user terminals.