US Patent:
20060184315, Aug 17, 2006
Inventors:
Kunwel Liu - Chandler AZ, US
Parvathy Bhaskaran - Mesa AZ, US
Richard Clayton - Phoenix AZ, US
Garurank Saxena - Chandler AZ, US
Juan Uribe - Gilbert AZ, US
Bernhard Weisshaar - Phoenix AZ, US
International Classification:
G01C 21/34
US Classification:
701202000, 701209000, 340995190
Abstract:
A method is provided for improved navigation guidance in a portable navigation device () having a first navigation operating mode () for requesting () and receiving () routelet data and navigation route data and operating in accordance with the routelet data () and a second operation navigation mode () for operating in accordance with the navigation route data (). The method includes in the first navigation operating mode (), the steps of transmitting a routelet request () comprising location data, speed data and direction data, the location, speed and direction data determined () in response to a present location, a present speed and a present direction of travel, respectively, of the portable navigation device (), receiving routelet data () and operating in accordance with the received routelet data ().