Christopher M Page

US Patent:

6593883, Jul 15, 2003

Filed:

Jun 25, 2001

Appl. No.:

09/891594

Inventors:

Mark J. Johnson - Cary IL
Christopher Page - Buffalo Grove IL

Assignee:

Motorola, Inc. - Schaumburg IL

International Classification:

G01S 124

US Classification:

342387, 342465

Abstract:

A first signal and a second signal are detected. The first and second signals are transmitted according to a timing pattern. An arrival time is identified for the first and second signals. Based on the timing pattern and the estimated arrival times of the first and second signals, a set of parameters is derived that characterize a timing relationship between a first device ( ) and a second device ( ).

US Patent:

7096115, Aug 22, 2006

Filed:

Sep 23, 2003

Appl. No.:

10/668916

Inventors:

Eric Groth - Buffalo Grove IL, US
Timothy McGrath - Chicago IL, US
Lumumba Mbekeani - Oak Park IL, US
Christopher S. Page - Long Grove IL, US

Assignee:

Navteq North America, LLC - Chicago IL

International Classification:

G08G 1/09
G06F 19/00

US Classification:

701117, 340905, 342456

Abstract:

A method for developing traffic messages is disclosed. Data indicating traffic speed at a plurality of locations on a road network are obtained. Each of the locations is assigned a unique location reference code. The data indicating traffic speed for the location reference codes assigned to locations along a road of the road network are evaluated. Locations reference codes along the road having related traffic speeds are grouped into at least one congestion event along the road. The congestion events are transmitted as traffic messages.