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GPS downloads routes in anticipation of losing satellite signal and navigates using cached data Disclosure Number: IPCOM000236017D
Publication Date: 2014-Apr-02
Document File: 1 page(s) / 24K

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The Prior Art Database


Common environmental factors such as busy cities with skyscrapers or tunnels, scenic routes with a lot of trees or tall mountains, or a storm moving into an area cause a global positioning system (GPS) to lose its satellite signal. Disclosed is a method where, in anticipation of the loss of signal strength, the environmental factors trigger the GPS device to pre-cache a calculated route so that it no longer depends on the satellites.

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GPS downloads routes in anticipation of losing satellite signal and navigates using cached data

Disclosed is a method for pre-caching GPS data based on environmental factors. While the GPS calculates a route to a destination, it also analyzes the surroundings where the route travels through ahead. Surroundings' analysis helps the GPS to identify the likelihood of when the loss of the satellite signal is to occur and establishes environmental factors as triggers. An additional environmental trigger is the weather forecast which detects inclement weather that causes the loss of GPS signal. The GPS caches the route onto the local device based on these triggers.

Upon the loss of satellite signal, the GPS starts operating using cached data along with images from a camera integrated with the GPS, last known traffic conditions, and time elapsed.


0) Calculate route to a destination using a GPS.

1) Using externally available weather monitoring feeds, integrate weather checking capability based on the calculated route. 2) Using external sources, like satellite images, analyze the surrounding environment on the route, for tall buildings, tunnels, heavy trees, tall mountains or hills. 3) When factors that could interfere with the satellite signal are detected, start caching user's current route. 4) When GPS loses signal, start operating using the cached route information.

Using an integrated in car camera or mobile phone camera, read and analyze


street intersectio...