POSITIONING WITH WIRELESS LOCAL AREA NETWORKS AND WLAN-AIDED GLOBAL POSITIONING SYSTEMS

• US 20190158976A1
• Filed: 01/04/2019
• Published: 05/23/2019
• Est. Priority Date: 02/14/2003
• Status: Active Grant

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: Wang, Yi-Hsiu
• Granted Patent: US 10,674,472 B2
• Time in Patent Office: Days
• CPC Class Codes: G01S 19/05 providing aiding data
• CPC Class Codes: G01S 19/06 employing an initial estimate of the location of the receiver as aiding data or in generating aiding data
• CPC Class Codes: G01S 19/252 Employing an initial estimate of location in generating assistance data
• CPC Class Codes: G01S 19/28 Satellite selection
• CPC Class Codes: G01S 19/29 carrier including Doppler, related G01S19/246 takes precedence
• CPC Class Codes: G01S 19/48 by combining or switching between position solutions derived from the satellite radio beacon positioning system and position solutions derived from a further system
• CPC Class Codes: G01S 5/12 by co-ordinating position lines of different shape, e.g. hyperbolic, circular, elliptical or radial
• CPC Class Codes: G01S 5/14 Determining absolute distances from a plurality of spaced points of known location
• CPC Class Codes: H04B 7/1851 Systems using a satellite or space-based relay H04B7/18508, H04B7/18521 take precedence; providing specific services H04B7/18523 - H04B7/18576
• CPC Class Codes: H04W 4/02 Services making use of location information
• CPC Class Codes: H04W 64/00 Locating users or terminals or network equipment for network management purposes, e.g. mobility management
• CPC Class Codes: H04W 84/12 WLAN [Wireless Local Area Networks]
• CPC Class Codes: H04W 88/08 Access point devices

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.

Claims

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;

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; and

determine frequency offsets for other GPS satellites based at least in part on the acquired GPS signal,

wherein the GPS baseband comprises;

a plurality of correlators configured to operate in parallel to acquire the GPS signal from the first GPS satellite, wherein each pair of correlators includes an in-phase correlator and a quadrature correlator.