A method and system for allowing nodes in a multi-node computer to be appropriated by a master node in the multi-node computer. The rotating assembly includes an upper bellows ring, a lower bellows ring and a runner between the lower bellows ring and the stationary face. The detectors are used for detecting the frequency a wireless signal emitted by the remote controller and respectively generate a detecting result. The input information storage unit stores the input information received by the communication unit for each user. The slave base station then makes an estimate as to the length of the delay between transmission of a signal from the mobile station to the slave base station.