Vehicle information system
First Claim
1. A method for tracking a vehicle comprising:
- receiving a reference signal from a positioning system;
computing position data related to the location of the vehicle using the received reference signal;
transmitting the position data from the vehicle to a server; and
at the vehicle, receiving from the server position correction data and determining estimated coordinates of the vehicle including combining data computed from the received reference signal and the position correction data;
wherein computing the position data and determining the estimated coordinates are performed repeatedly for an interval of time using the same received position correction data, and subsequent to the interval of time, are performed repeatedly without using the received correction data.
2 Assignments
0 Petitions
Accused Products
Abstract
A vehicle information system which includes an in-vehicle system and a centralized server system. The in-vehicle system communicates with the server system using a wireless communication link. The vehicle receives a reference signal from a positioning system, computes position data related to the location of the vehicle using the received reference signal, and transmits the position data to the server. The vehicle receives from the server position correction data and determines estimated coordinates of the vehicle, including combining data computed from the received reference signal and the position correction data. Computing the position data and determining the estimated coordinates are performed repeatedly for an interval of time using the same received position correction data, and subsequent to the interval of time, are performed repeatedly without using the received correction data.
186 Citations
9 Claims
-
1. A method for tracking a vehicle comprising:
-
receiving a reference signal from a positioning system; computing position data related to the location of the vehicle using the received reference signal; transmitting the position data from the vehicle to a server; and at the vehicle, receiving from the server position correction data and determining estimated coordinates of the vehicle including combining data computed from the received reference signal and the position correction data; wherein computing the position data and determining the estimated coordinates are performed repeatedly for an interval of time using the same received position correction data, and subsequent to the interval of time, are performed repeatedly without using the received correction data. - View Dependent Claims (2, 3)
-
-
4. Software recorded on a computer readable medium for causing an in-vehicle computer to perform the functions of:
-
receiving a reference signal from a positioning system; computing position data related to the location of the vehicle using the received reference signal; transmitting the position data to a server; receiving from the server position correction data; determining estimated coordinates of the vehicle including combining data computed from the received reference signal and the received position correction data; and
repeatedly computing the position data and determining the estimated coordinates for the vehicle using the computed position data and the received position correction data for a time interval, and after the time interval determining the estimated coordinates without using the received position correction data. - View Dependent Claims (5, 6)
-
-
7. An in-vehicle navigation system comprising:
-
a positioning system receiver for receiving reference signals from a positioning system; a wireless communication interface for accepting data signals from a server; and a processor coupled to the positioning system and to the wireless communication system, wherein the onboard computer is programmed to perform the functions of accepting reference data from the positioning system receiver, determining position data from the reference data, providing the position data to the wireless communication interface for transmission to the server, accepting position correct data from the communication interface, and determining estimated coordinates for the vehicle from the reference data and the accepted position correction data; and repeatedly computing the position data and determining the estimated coordinates for the vehicle using the computed position data and the accepted position correction data for a time interval, and after the time interval determining the estimated coordinates without using the accepted position correction data. - View Dependent Claims (8, 9)
-
Specification