Method and system for retaining synchronization across multiple wireless devices during extended power saving intervals
First Claim
1. A wireless device comprising:
- a wireless local area network (WLAN) transceiver configured to (i) selectively transition between operating in a power save mode and operating in a full power mode, and (ii) while operating in the full power mode, wirelessly communicate with a second wireless device;
a mobile phone radio transceiver configured to receive, in accordance with a mobile phone protocol, time information from a first base station, wherein the time information is based on a time reference maintained by the first base station; and
a controller configured to (i) instruct the WLAN transceiver to transition to the full power mode upon expiration of a sleep period and (ii) determine the expiration of the sleep period based on(a) the time information from the first base station, and(b) an offset between the time reference maintained by the first base station and a second time reference maintained by a second base station.
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Accused Products
Abstract
A wireless device includes a wireless local area network (WLAN) transceiver configured to (i) selectively transition between operating in a power save mode and operating in a full power mode, and (ii) while operating in the full power mode, wirelessly communicate with a second wireless device. The wireless device also includes a mobile phone radio transceiver configured to receive, in accordance with a mobile phone protocol, time information from a first base station. The time information is based on a time reference maintained by the first base station. The wireless device also includes a controller configured to instruct the WLAN transceiver to transition to the full power mode upon expiration of a sleep period. The controller determines the expiration of the sleep period based on (i) the time information and (ii) an offset between the time reference and a second time reference maintained by a second base station.
26 Citations
21 Claims
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1. A wireless device comprising:
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a wireless local area network (WLAN) transceiver configured to (i) selectively transition between operating in a power save mode and operating in a full power mode, and (ii) while operating in the full power mode, wirelessly communicate with a second wireless device; a mobile phone radio transceiver configured to receive, in accordance with a mobile phone protocol, time information from a first base station, wherein the time information is based on a time reference maintained by the first base station; and a controller configured to (i) instruct the WLAN transceiver to transition to the full power mode upon expiration of a sleep period and (ii) determine the expiration of the sleep period based on (a) the time information from the first base station, and (b) an offset between the time reference maintained by the first base station and a second time reference maintained by a second base station. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method of operating a wireless device, the method comprising:
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selectively transitioning a wireless local area network (WLAN) transceiver of the wireless device between operating in a power save mode and operating in a full power mode; wirelessly communicating with a second wireless device while the WLAN transceiver is operating in the full power mode; using a mobile phone radio transceiver of the wireless device, receiving time information from a first base station in accordance with a mobile phone protocol, wherein the time information is based on a time reference maintained by the first base station; determining expiration of a sleep period based on (i) the time information from the first base station, and (ii) an offset between the time reference maintained by the first base station and a second time reference maintained by a second base station; and instructing the WLAN transceiver to transition to the full power mode upon expiration of the sleep period. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21)
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Specification