System and method for access point based positioning

US8924155B2 · kind B2 · utility

Assignee

• TEXAS INSTRUMENTS INCORPORATED · US

Inventors

• Deric Wayne Waters · Dallas, US
• Sthanunathan Ramakrishnan · Bengaluru, IN
• Ariton E. Xhafa · Plano, US
• Jaiganesh Balakrishnan · Savanuru, IN
• Tarkesh Pande · Dallas, US
• Sandeep Kasargod · Bengaluru, IN
• Saket Thukral · San Diego, US

Key dates

• Filing date: Sep 12, 2011
• Grant date: Dec 30, 2014
• Expiry date: May 6, 2033

Classification

• Technology area (CPC H): Electricity
• CPC primary: H04W64/00
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

Apparatus and methods for scanning for access points (APs) for wireless local area network (WLAN) positioning. In one embodiment a wireless device includes a WLAN positioning system. The WLAN positioning system includes an AP scanner. The AP scanner is configured to determine which WLAN channels are being used by APs proximate to the wireless device. The AP scanner is also configured to scan for AP transmissions only the WLAN channels determined to be used by APs proximate to the wireless device. The AP scanner is further configured to extract signal strength and AP identification information for WLAN positioning from the AP transmissions on the scanned channels.