Positioning with wireless local area networks and WLAN-aided global positioning systems
First Claim
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1. A method including:
- exchanging information between a first device and a second device in an ad hoc communication mode, wherein exchanged information includes last positions of the first and the second devices and update times associated with the last positions; and
determining a new common position of the first and the second devices using the exchanged information, the first and the second devices having wireless networking capability.
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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 of seconds instead of minutes) to determine its coordinate position.
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Citations
20 Claims
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1. A method including:
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exchanging information between a first device and a second device in an ad hoc communication mode, wherein exchanged information includes last positions of the first and the second devices and update times associated with the last positions; and determining a new common position of the first and the second devices using the exchanged information, the first and the second devices having wireless networking capability. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A first wireless device comprising:
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means for receiving information regarding a second wireless device, the first wireless device configured to communicate with the second wireless device in an ad hoc communication mode, wherein received information includes a last position of the second wireless device and an update time associated with the last position; and means for determining a new common position of the first and the second wireless devices using the received information regarding the second wireless device and corresponding information for the first wireless device. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification