Group voice communication of walkie-talkie mode in Bluetooth communication system

A first wearable electronic device which is paired with a mobile phone device through Bluetooth communication standard, the mobile phone device being paired with at least one second wearable electronic device through the Bluetooth communication standard, and the first wearable electronic device is capable of communicating with the at least one second wearable electronic device and comprises:

• a communication circuit, for sensing a Bluetooth radio-frequency signal sent from the at least one second wearable electronic device;
• and
• a processing circuit, coupled to the communication circuit, for:
• determining whether a distance between the first wearable electronic device and the at least one second wearable electronic device is larger than a distance threshold by detecting the Bluetooth radio-frequency signal;
• controlling the first wearable electronic device and the at least one second wearable electronic device exiting an audio playing mode and then entering a walkie-talkie mode to start a walkie-talkie conversation with the at least one second wearable electronic device when the distance is larger than the distance threshold, wherein the first wearable electronic device and the at least one second wearable electronic device are controlled in the audio playing mode to play an audio packet stream sent from the mobile phone device through the Bluetooth communication standard and do not start the walkie-talkie conversation when the distance is smaller than the distance threshold;
• and
• during the walkie-talkie mode using the communication circuit to send voice data from the first wearable electronic device to the at least one second wearable electronic device to make the at least one second wearable electronic device receive and play the voice data for at least one different user.