Patent ID: 7369518

Claim:
A power consumption reducing apparatus comprising: a periodic active state conversion unit which, in each awake period, converts an inactive state into an active state, wherein power consumption is greater in the active state than in the inactive state; a beacon frame reception unit which, in an active state converted by the period active state conversion unit, receives a beacon frame; an awake window setting unit which, when the beacon frame reception unit receives the beacon frame, and if an interval value of an awake window, in which the active state is maintained for a predetermined time, among field values of the received beacon frame is valid, sets the awake window; an awake window interval counting unit which counts, in a counting, the interval value in the awake window set by the awake window setting unit; and an inactive state conversion unit which, if the awake window counting unit finishes the counting, converts the awake window into an inactive state, wherein if the beacon frame reception unit does not receive the beacon frame within a predetermined time, or if the beacon frame is received within the predetermined time and a length value of the awake window contained in the received beacon frame is not valid, the awake window setting unit converts the active state into the inactive state.