Patents Examined by Yamane Woldetatios
  • Mobile communication device and communication network for providing location services
    Patent number: 6070083
    Abstract: A mobile communication system and communication device for providing location services. Time difference of arrival (TDOA) measurements are used to determine the location of a mobile of the network. The location may be forwarded to a service provider. The location may alternatively be used to determine service providers that are local to the mobile. Correction factors deprived from calibration TDOA measurements made at calibration terminals are applied to the TDOA measurements enhance the accuracy of the location determination.
    Type: Grant
    Filed: May 14, 1998
    Date of Patent: May 30, 2000
    Assignee: Nortel Networks Corporation
    Inventors: J. Michael Watters, Leo Strawczynski, David Steer