Method for transmitting emergency rescue signal by accessory device communicating with user terminal

A method of transmitting an emergency rescue signal by an accessory

• device communicating with a user terminal, the method comprising:
• providing a trigger signal from the accessory device to the user terminal in response to a push input applied to a switch included in the accessory device;
• generating at least one of image data and audio data related to a user's state on the basis of the trigger signal;
• and
• providing, as an emergency rescue signal, user state data associated with the image data and the audio data to a management server,
• wherein the generating of at least one of the image data and the audio data comprises:
• generating first audio data by recording surround sound for a first time period on the basis of the trigger signal;
• and
• generating second audio data by recording surround sound for a second time period longer than the first time period after the generation of the first audio data, and
• wherein the generating of at least one of the image data and the audio data further comprises generating third audio data by recording surround sound for a third time period shorter than the first time period, in response to a failure of the transmission of the first audio data to the management server.