Multiplex communications – Communication over free space – Signaling for performing battery saving
Reexamination Certificate
2005-02-04
2011-10-25
Ajibade Akonai, Olumide T (Department: 2617)
Multiplex communications
Communication over free space
Signaling for performing battery saving
C370S252000, C370S312000, C370S318000, C370S432000, C370S329000, C370S328000, C370S338000, C455S041200, C455S343200, C455S343300, C455S343400, C455S574000
Reexamination Certificate
active
08045494
ABSTRACT:
A system (400), device (500) (401), and method are provided for power saving in a wireless communication network (400), where all devices (401i) regularly transmit a beacon (600) but can enter a hibernation mode in which they do not transmit beacons (600) and operate in a power-saving state. A device (400) announces the start (303) and duration (304) of the hibernation period in its beacon (600) prior to its hibernation period. The neighboring devices (401i) keep information on the presence of the beacon (600) of the hibernating device (401) in their own beacons (600) in order to block the beacon slot (204) for the hibernating device (401) during its sleep time. Devices (401i) furthermore include an information element (604) in their beacons (600) that contains all receiver addresses for which a device (401i) has data pending to be sent.
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IEEE 802.16e Sleep Mode, by Itzik, Kitroser et al., Mar. 11, 2003, pp. 1-9.
Del Prado Pavon Javier
Habetha Joerg
Ajibade Akonai Olumide T
Koninklijke Philips Electronics , N.V.
Liberchuk Larry
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