Method and apparatus for transmitting or receiving data using bluetooth in wireless communication system

A first device for transmitting or receiving data using Bluetooth low energy (BLE) in a wireless communication system, the device comprising:

• a communication unit configured to communicate with an outside in a wireless or wired manner;
• and
• a processor operatively connected to the communication unit, wherein the processor is configured to:
• form Bluetooth LE connection with a second device;
• establish an isochronous channel for transmitting an audio packet with the second device;
• and
• transmit audio packets to the second device through the isochronous channel in an interleaved method during a specific channel interval,
• wherein a sequence in which the audio packets are transmitted is determined regardless of whether acknowledgement (ACK) for each of the audio packets is received from the second device.