Patent ID: 6169515
Filing Date: 2001-01-02
Classification: G01C,G01S,G08G,G09B

Abstract:
A navigation information system for providing information to a mobile user dependent on the location of the mobile user, the system comprising: a mobile communications system having a fixed part and a plurality of mobile parts for communicating with the fixed part, each mobile part including means for transmitting to the fixed part of a request for guidance information relating to a destination specified by the user of the mobile part, and for receiving such guidance information from the fixed part, and the fixed part including: means for determining the location of a mobile a requesting guidance information, means for generating guidance information according to the present location and specified destination of the mobile part, and means for transmitting the guidance information so generated to the mobile part, whereby information dependent on the location and specified destination of the mobile part is transmitted to the mobile part, means for determining the location of the mobile part in relation to a geographical overlay comprising a plurality of discrete predetermined overlay areas, and means for transmitting guidance information associated with an overlay area which includes the location of at least one mobile part, whereby mobile parts within that overlay area simultaneously receive the same guidance information associated with that overlay area.