Offline radio maps for GNSS-denied areas

US11592517B2 · kind B2 · utility

Assignee

• HERE GLOBAL B.V. · NL

Inventors

• Lauri Aarne Johannes Wirola · Tampere, FI
• Petri Rauhala · Tampere, FI
• Marko Luomi · Lempäälä, FI

Key dates

• Filing date: Dec 19, 2020
• Grant date: Feb 28, 2023
• Expiry date: Apr 26, 2041

Classification

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

Abstract

Disclosed is an approach to enable radio map download for Global Navigation Satellite System (GNSS)-denied areas. In particular, processor(s) (e.g., of positioning server(s)) could identify GNSS-denied area(s) in an initial radio map, the GNSS-denied area(s) being (i) one or more areas in which at least one GNSS signal is or was unavailable and (ii) a subset of a plurality of areas represented by the initial radio map. Subsequently, the processor(s) could generate a partial radio map representing radio data only for the GNSS-denied area(s) identified in the initial radio map, and could then transmit the partial radio map to a mobile device for storage at the mobile device. In this way, the mobile device could optimize resource usage and perform radio-based position estimations at least in the GNSS-denied area(s) that were identified.