Patent ID: 7146271
Filing Date: 2006-12-05
Classification: G01C,H04L

Abstract:
1. A system for managing navigation information comprising: an On-Board Unit (OBU) associated with a motor vehicle and comprising a central unit, the central unit capable of communicating with a wireless communications network, and communicating with a user; the OBU storing first navigation information; a service provider including a database, wherein the database includes second navigation information; wherein second navigation information includes more items of navigation information than first navigation information; wherein the service provider responds to a request for navigation information from the OBU with ordered navigation information that is sent to the OBU in a predetermined order, wherein route information is sent before other navigation information; and wherein the ordered navigation information includes a first region including a plurality of navigation features encoded in absolute coordinates, and a second region including a plurality of navigation features encoded in relative coordinates.