Patents by Inventor Phillippe Duplessis

Phillippe Duplessis 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).

  • Mobility management method for mobile terminals in a cellular wireless communication system, and equipment for implementing the method
    Patent number: 8300649
    Abstract: The present invention relates to a mobility management method for mobile terminals in a cellular wireless communication system. The system comprises a core network and an access network comprising at least one controller, each controller controlling a group of base stations each defining at least one cell, and sets of cells form respective location areas. In the method the cells defined by the base stations controlled by each controller of the access network form a predetermined number of location areas and the belonging of each of the cells to one of the predetermined number of location areas is independent of its geographical location.
    Type: Grant
    Filed: May 22, 2007
    Date of Patent: October 30, 2012
    Assignee: Alcatel Lucent
    Inventors: Bertrand Couaillet, Phillippe Duplessis, Catherine Duplessis, legal representative, Isabelle Duplessis, legal representative, Mauricette Duplessis, legal representative
  • MOBILITY MANAGEMENT METHOD FOR MOBILE TERMINALS IN A CELLULAR WIRELESS COMMUNICATION SYSTEM, AND EQUIPMENT FOR IMPLEMENTING THE METHOD
    Publication number: 20110222514
    Abstract: The present invention relates to a mobility management method for mobile terminals in a cellular wireless communication system. The system comprises a core network and an access network comprising at least one controller, each controller controlling a group of base stations each defining at least one cell, and sets of cells form respective location areas. In the method the cells defined by the base stations controlled by each controller of the access network form a predetermined number of location areas and the belonging of each of the cells to one of the predetermined number of location areas is independent of its geographical location.
    Type: Application
    Filed: May 22, 2007
    Publication date: September 15, 2011
    Applicant: ALCATEL LUCENT
    Inventors: Bertrand Couaillet, Phillippe Duplessis, Catherine Duplessis, Isabelle Duplessis, Mauricette Duplessis
  • Method for locating a cellular radiocommunication mobile station, and equipment for implementing the method
    Patent number: 5850609
    Abstract: At least one fixed beacon is associated with a user of a mobile station and emits, with a range (r) substantially smaller than the characteristic dimension (R) of a cell, a radio signal specific to said user. When the mobile station detects the radio signal emitted by the beacon, the station addresses a signal to the communication network indicating that it is within range of the beacon.
    Type: Grant
    Filed: November 4, 1996
    Date of Patent: December 15, 1998
    Assignee: Nortel Matra Cellular
    Inventors: Ian Sugarbroad, Jean Cellmer, Alain Ohana, Phillippe Duplessis