Patent ID: 6937872

Claim:
A method to measure a frequency related to a basestation of a cellular communication system, the method comprising: receiving, at a first mobile station, a first cellular signal from the basestation, the first cellular signal containing a first timing marker; determining a first time tag for the first timing marker from at least one satellite positioning system signal received at the first mobile station; determining a first location of the first mobile station from at least one satellite positioning system signal received at the first mobile station; transmitting, through a cellular communication link, the first time tag and the first location to a server; receiving, at a second mobile station, a second cellular signal from the basestation, the second cellular signal containing a second timing marker; determining a second time tag for the second timing marker from at least one satellite positioning system signal received at the second mobile station; determining a second location of the second mobile station from at least one satellite positioning system signal received at the second mobile station; transmitting, through a cellular communication link, the second time tag and the second location to the cellular network entity; and combining a location of the basestation with the first and second time tags and the first and second locations to compute a first frequency related to the basestation.