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
Optimization of packaging sizes
Asynchronous line interface rate adaptation to the physical layer with synchronous lines at the connection layer
Method to quantify siRNAs, miRNAs and polymorphic miRNAs
Rotating device
Communication apparatus, power supply control method, display apparatus, communication method, and computer program product
Soybean cultivar CL1013675
Commissioning incoming packet switched connections
  Randomly Featured Patents
Optical sensor calibration
Method and system for a recursive security protocol for digital copyright control
Self-aligned patterned etch stop layers for semiconductor devices
Method for transferring at least one micro-technological layer
Low intermodulation electromagnetic feed cellular antennas
Method for producing L-phenylalanine by fermentation
Back cover for a handset
Time signal clock
Control apparatus for an air conditioning system
Eyeglass appliance having clamping members