Patent ID: 7697464
Filing Date: 2010-04-13
Classification: H04B,H04W,Y02D

Abstract:
1. A wireless terminal management method in a base station constituting a CSMA wireless communication system together with a wireless terminal group including a plurality of wireless terminals operable intermittently, said method comprising: collecting requested power saving periods as periods each for n beacons (where n is generally an integer of two or more), the requested power saving periods notified from each of wireless terminals operable intermittently at a time of an association, the requested power saving periods selected from among n beacons and m×n beacons (where m is an integer two or more); notifying the wireless terminals of a determined power saving period determined in the base station; adjusting a start timing of power saving of each of the wireless terminals in order that a return timing from power save states is not overlapped in time with each other as much as possible in accordance with the determined power saving periods, the adjusting including adjusting the start timing such that there is an interval longer than at least two beacon periods between mutual generation of each return timing; transiting, in accordance with the start timing of power saving adjusted at said adjusting a start timing of power saving, wireless terminals reaching the start timing of power saving to initial power save states; and transiting data transmission/reception and power save state in which transmission/reception of data is performed with top priority with a wireless terminal at every automatic return thereof from a power save state to transit the wireless terminal to the power save state.