Patent ID: 7206692
Filing Date: 2007-04-17
Classification: G01C,G08G

Abstract:
1. A navigation system comprising: a mobile unit having a control panel configured to accept a routing request from a user, the mobile unit having a communications interface configured to transmit the routing request and receive routing information related to the routing requests, the mobile unit having a display configured to display the routing information to the user; a route calculation module located remote from the mobile unit, the route calculation module receiving the routing request and based thereon performing at least one of navigation and route planning operations including identifying characteristic information for roads intersecting at a node in a roadway network and estimating potential delays by traffic traveling through the node based on the characteristic information for the roads, the route calculation module transmitting to the mobile unit results of the at least one of navigation and route planning operations; and a buffer for temporarily storing route information based on the results received from the route calculation module.