Resources Contact Us Home
Transmitter identifier database for enhanced GPS performance

Image Number 6 for United States Patent #8131464.

A mobile station database of cellular identifications and associated position information is stored in mobile station memory. The mobile station uses the position information in the database to assist in determining a current position for the mobile based on an identifier, such as cell ID, base station BSIC, PSC, or carrier frequency. A satellite vehicle signal is searched in an uncertainty region that is a function of position information associated with the current identifier. The uncertainty region can be limited by assumed platform dynamics via predefined velocity and acceleration information. Time maintenance for the mobile station can also be achieved through known approximate position from the position database and measurement of a single satellite vehicle propagation delay. The mobile station can compare a position determination obtained through satellite vehicle signals with position database information to determine the validity of that position. Out-of-network position information is also stored in the position database and is optionally shared with a network.

  Recently Added Patents
Housekeeping cart
Systems and methods for authorizing, authenticating and accounting users having transparent computer access to a network using a gateway device
System and method for backup communication over ethernet
Data-conditioned encryption method
Dynamic learning method and adaptive normal behavior profile (NBP) architecture for providing fast protection of enterprise applications
Method and device for managing a turning setpoint applied to at least one turning actuator for the rear wheels of an automobile
Method and system for producing fluoride gas and fluorine-doped glass or ceramics
  Randomly Featured Patents
Liquid crystal display device and method of manufacturing the same
Radio transceiver apparatus for changing over between antennas
Secondary recovery method utilizing thickened water
Process for metal nitride deposition
Door lifting device
Arched building structure
Apparatus and method for real-time monitoring and controlling of networked appliances using an intermediate server
Distributed terminal optical transmission system
Bridge amplifier operating from an asymmetrical power supply
Substrate edge seal and clamp for low-pressure processing equipment