Improving scalability and reliability of hardware geo-fencing with failover support

US9258677B2 · kind B2 · utility

Assignee

• MICROSOFT TECHNOLOGY LICENSING, LLC · US

Inventors

• Sanjib Saha · Sammamish, US
• Fernando Gonzalez · Bellevue, US
• Shaun Hedrick · Seattle, US
• Parmjeet Singh · Seattle, US
• Ashish Gadre · Kirkland, US
• Frank Gorgenyi · Bremerton, US
• Mark Inderhees · Bellevue, US
• Janet L. Schneider · Bellevue, US
• Stuart Harper · Seattle, US

Key dates

• Filing date: Nov 21, 2013
• Grant date: Feb 9, 2016
• Expiry date: Dec 31, 2033

Classification

• Technology area (CPC G): Physics
• CPC primary: G01S19/48
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

Systems and methods disclosed herein may include tracking one or more geo-fences using a GNSS hardware processor within a computing device. The tracking may use at least one GNSS signal. State changes of the one or more geo-fences during the tracking may be saved in a shared state database. The shared state database may be shared between the GNSS hardware processor and an application processor within the computing device. Upon detecting a deterioration of the at least one GNSS signal, tracking the one or more geo-fences may be switched from using the GNSS hardware processor to using the application processor. After the switching, an initial state of each of the one or more geo-fences may be set by using states currently stored in the shared state database prior to the switching.