Wireless personal area network, coordinator thereof, and coordinator selection method for hand-over thereof

A method for selecting a coordinator for a coordinator hand-over in a wireless personal area network, comprising:

• controlling a coordinator to use a list of candidate coordinators for performing roles as coordinators, and to broadcast a candidate inquiry request command;
• controlling the candidate coordinators to receive the candidate inquiry request command, controlling one of the candidate coordinators to sequentially broadcast a candidate notifying command, and controlling other candidate coordinators to check whether the candidate notifying command has been received;
• controlling a device in the wireless personal area network to check whether the candidate notifying command has been received from the broadcasting candidate coordinator, and to sequentially broadcast a candidate inquiry information command including the candidate notifying command;
• controlling the candidate coordinator to check whether the candidate inquiry information command has been received from the device having received the candidate notifying command broadcasted by the candidate coordinator, and to sequentially broadcast a candidate inquiry response command including the number of accessible devices and the candidate notifying command receipt information;
• and
• controlling the coordinator to receive the candidate inquiry response command and estimate communication performance ranks for the respective candidate coordinators.