Chun M Tang

US Patent:

20060247844, Nov 2, 2006

Filed:

Apr 27, 2005

Appl. No.:

11/115540

Inventors:

Irving Wang - Tampa FL, US
Chun Tang - Brooklyn NY, US

International Classification:

G08G 1/00

US Classification:

701117000

Abstract:

A method and apparatus for collecting and broadcasting vehicular traffic in a summarized and compressed format suitable for reception by inexpensive wireless devices. In the preferred embodiment, vehicular traffic data is received from one to many inexpensive Doppler Sensors mounted in fixed locations reflecting the speed of vehicles entering one or more known spatial points. In the preferred embodiment of the invention, the averaged vehicle speed is encoded in a compressed, quantized format and formed into a broadcast unit containing data from multiple locations. The broadcast unit is then broadcast over a cellular (e.g. CDMA) network for reception by inexpensive wireless devices. The wireless devices can then use the data to display traffic data in a graphical format or be processed for route planning or other similar functions.