Patent ID: 8909468
Filing Date: 2014-12-09
Classification: G01C

Abstract:
1. A method for Global Positioning System (GPS) navigation on a GPS device having a processor, comprising: receiving, at the GPS device, input from a user corresponding to an intended destination; calculating, via the processor, a route from a starting point to the intended destination, wherein the route includes: a problematic geographic region for GPS navigation at an intermediate stage of the route, a defined entry portal corresponding to the problematic geographic region, and a defined exit portal corresponding to the problematic geographic region; determining, by the processor, that the GPS device has entered the defined entry portal; suspending, by the processor, route recalculation processing and processing of GPS signal reception errors in response to determining that the GPS device has entered the defined entry portal; determining, by the processor, that the GPS device has entered the defined exit portal; and resuming, by the processor, route recalculation processing and processing of GPS signal reception-related errors in response to determining that the GPS device has entered the defined exit portal; wherein the defined entry portal and the defined exit portal each include an area outside of the problematic geographic region.