Patent ID: 8923174
Filing Date: 2014-12-30
Classification: H04W,Y02D

Abstract:
1. A wireless apparatus configured to send notification signals at intervals of a certain period, each notification signal including information for identification of the wireless apparatus, the wireless apparatus comprising: a memory configured to store the number of wireless devices that are in such a state as to be able to communicate with the wireless apparatus; a determining module configured to determine, before sending the notification signal, whether a wireless channel of the wireless apparatus to be used for sending the notification signal is being used by another wireless device; a sending module configured to send the notification signal if the wireless channel has not been used by any other wireless devices throughout a first period; a receiving module configured to receive a signal that enables a communication with the wireless apparatus; a controller configured to control the receiving module so that a signal transmitted from another wireless device is receivable until a lapse of a second period after transmission of the notification signal; and a suspending module configured to suspend supply of power to the receiving module of the wireless apparatus if a signal has not been received from any other wireless devices to the wireless apparatus in the second period and if the number of wireless devices stored in the memory is zero, wherein, if the receiving module receives a signal transmitted from another wireless device in the second period, the controller controls the receiving module of the wireless apparatus so that said signal transmitted from said another wireless device is receivable even after a lapse of the second period.