Positioning with wireless local area networks and wlan-aided global positioning systems
AssigneeQUALCOMM Incorporated
InventorYi-Hsiu Wang
Life of this patent
Estimating the term…
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.
Claims20
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 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.
A method comprising:
- 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.
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 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.
Dependencies are inferred from the claim text.