Method and device for transmitting or receiving data in wireless communication system

A first device for transceiving data with a second device in a wireless communication system, the first device comprising:

• a communication unit for communicating with an external device in a wireless or wired manner;
• and
• a controller functionally connected to the communication unit, wherein the controller is configured to:
• open an audio link through a Bluetooth LE (low energy) connection with the further device;
• when a specific event occurs through the audio link in connection to the second device, transceive audio data or voice data via the audio link according to the specific event;
• and
• obtain control information for performing a specific function related to the audio data or voice data from the second device or a user,
• wherein the audio link comprises at least one isochronous channel.