Patents by Inventor David Andrew Tetreau

David Andrew Tetreau has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 6577616
    Abstract: Methods and apparatuses are provided for CDMA (code division multiple access) access availability to a large cell area, and for traffic channel establishment. A group of cell site modems are configured to look for access attempts generated in respective complete and/or sectorized circular or annular shaped areas centered at the center of the cell area, the areas collectively covering the cell area. To achieve this, each cell site modem has a local clock and the local clock within the first of the cell site modems is synchronized with a standard network time, and the local clock of each of the subsequent cell site modems is offset by a respective delay with respect to the standard network time which causes the cell site modem to search within its respective annular shaped area. A cell site modem is also made available as a traffic cell site modem and is operable to have its traffic acquisition search window centered at a location of an access attempt.
    Type: Grant
    Filed: December 29, 1999
    Date of Patent: June 10, 2003
    Assignee: Nortel Networks Limited
    Inventors: Shahid Rasul Chaudry, Muhammad Khaledul Islam, Hong Ren, Azeem Ahmad, Thomas Leonard Trevor Plestid, Neil McGowan, James Russell Weisert, Brian Douglas Troup, David Andrew Tetreau, David Allan Boettger