When a portable device cannot connect to a network, offline navigation directions are generated and displayed by obtaining navigation instructions stored on the portable device which direct a user from a first location to a second location. When a network connection later becomes available, the portable device obtains online navigation directions from the first location to the second location from a navigation server. The portable device updates the offline navigation directions in a least disruptive manner, with information from the online navigation directions by determining the difference between the online and the offline navigation directions. If the online and offline navigation directions are similar, the portable device updates the display with estimated time data, traffic data, etc., from the online navigation directions. Otherwise, if there is a significant difference between the online and offline navigation directions, the portable device displays the online navigation directions as an alternative route.


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    Title :

    Integrating online navigation data with cached navigation data during active navigation


    Contributors:

    Publication date :

    2018-03-27


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    English


    Classification :

    IPC:    G01C Messen von Entfernungen, Höhen, Neigungen oder Richtungen , MEASURING DISTANCES, LEVELS OR BEARINGS / G08G Anlagen zur Steuerung, Regelung oder Überwachung des Verkehrs , TRAFFIC CONTROL SYSTEMS / H04W WIRELESS COMMUNICATION NETWORKS , Drahtlose Kommunikationsnetze



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