Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
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
Optoelectronic semiconductor chip and method for manufacturing a contact structure for such a chip
Network-based dynamic encoding
Therapeutic compositions and methods
Aware manufacturing of integrated circuits
Systems and methods for updating a data store using a transaction store
Autobrake and decel control built-in test equipment
Modular sport center
  Randomly Featured Patents
Ion exchange of metals from aqueous solutions using compositions of synthetic resins reacted with polyisocyanurate salts
Multi-phase multi-access pipeline memory system in which the pipeline memory can decode addresses issued by one processor while simultaneously accessing memory array by other processor
Process for preparing an ether solution of polyamic acids and polyimide resins
Sensor including a photocatalyst
Reference beam generator and method
Context data in UPNP service information
Carrier for personal watercraft
Control system for operating a window wiper in response to water moisture
C++ classes for a digital library
Surface mounted coil