Preference lists for assistance data requests in global navigation satellite systems

Abstract

Methods and devices may request and provide assistance data from an assistance server to a receiver in a global navigation satellite system. A request for assistance data may include a preference list of navigation models suitable for the requesting receiver. Multiple preference lists for different navigation model types (e.g., orbit model, clock model, almanac model) may be included in a single list and/or data structure, or as multiple lists and/or data structures. An assistance server may receive and process the preference list, for example, by parsing and traversing the ordered list(s) for different navigation model types, in order to provide satellite navigation data to the receiver in accordance with suitable navigation models that are available at both the receiver and the assistance server.

Description

technical field [0001] The present invention relates to the field of positioning and, more particularly, to preference lists for assistance data requests in global navigation satellite systems. Background technique [0002] One of the most well-known global navigation satellite systems (GNSS) is the Global Positioning System (GPS). For example, other GNSSs include the Global Navigation Satellite System (GLONASS) and the European Galileo positioning system (Galileo). GNSS may be used in conjunction with a receiver device, such as a stand-alone GNSS navigation device or a GNSS-enabled mobile receiver device, for multiple functions. For example, GPS mobile receivers can assist users in determining their precise location, navigating roads and locating destinations, and viewing maps of the surrounding area. While traditional stand-alone navigation devices still exist, technology now allows navigation devices to be part of other mobile receivers such as cell phones or personal d...

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These situations can be problematic and inefficient, especially in mode

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