POSITIONING WITH WIRELESS LOCAL AREA NETWORKS AND WLAN-AIDED GLOBAL POSITIONING SYSTEMS
First Claim
Patent Images
1. A wireless device comprising:
- a wireless local area network (WLAN) baseband configured to;
receive decoded global positioning system (GPS) data from one or more access points in a communication system; and
a GPS baseband configured toidentify a first GPS satellite based at least in part on the decoded GPS data; and
acquire a GPS signal from the first GPS satellite; and
determine frequency offsets for other GPS satellites based at least in part on the acquired GPS signal.
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Abstract
Accurate position capability can be quickly provided using a Wireless Local Area Network (WLAN). When associated with a WLAN, a wireless device can quickly determine its relative and/or coordinate position based on information provided by an access point in the WLAN. Before a wireless device disassociates with the access point, the WLAN can periodically provide time, location, and decoded GPS data to the wireless device. In this manner, the wireless device can significantly reduce the time to acquire the necessary GPS satellite data (i.e. on the order if seconds instead of minutes) to determine its coordinate position.
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Citations
20 Claims
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1. A wireless device comprising:
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a wireless local area network (WLAN) baseband configured to; receive decoded global positioning system (GPS) data from one or more access points in a communication system; and a GPS baseband configured to identify a first GPS satellite based at least in part on the decoded GPS data; and acquire a GPS signal from the first GPS satellite; and determine frequency offsets for other GPS satellites based at least in part on the acquired GPS signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method comprising:
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receiving, by a wireless local area network (WLAN) baseband of a wireless device, decoded global positioning system (GPS) data from one or more access points in a communication system; identifying, by a GPS baseband of the wireless device, a first GPS satellite based at least in part on the decoded GPS data; acquiring a GPS signal from the first GPS satellite; and determining frequency offsets for other GPS satellites based at least in part on the acquired GPS signal. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18)
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19. A wireless device comprising:
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a wireless local area network (WLAN) baseband configured to; receive decoded global positioning system (GPS) data from one or more access points in a communication system; and a GPS baseband configured to; identify a first GPS satellite based at least in part on the decoded GPS data; acquire a GPS signal from the first GPS satellite; determine a frequency offset associated with the GPS signal from the first GPS satellite; and determine a location of the wireless device based at least in part on the determined frequency offset. - View Dependent Claims (20)
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Specification