Patent ID: 7447178

Claim:
A method for selecting a coordinator for a coordinator hand-over in a wireless network: controlling a coordinator to broadcast a candidate inquiry request command; controlling more than one 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 to check whether the candidate notifying command has been received from the broadcasting candidate coordinator, and to sequentially broadcast a candidate inquiry information 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, controlling the coordinator to check the number of transmission devices of the received candidate inquiry information command, thereby estimating the communication performance of the coordinators: and controlling the coordinator to transfer a role as a coordinator to a first rank candidate coordinator when the communication performance of the first rank candidate coordinator is, superior to that of the coordinator.