×

Methods and apparatuses for measuring frequencies of basestations in cellular networks using mobile GPS receivers

DC
  • US 6,937,872 B2
  • Filed: 07/02/2002
  • Issued: 08/30/2005
  • Est. Priority Date: 04/15/2002
  • Status: Expired due to Fees
First Claim
Patent Images

1. 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.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×