Patents by Inventor Hakan Lindvall

Hakan Lindvall 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).

  • Methods for determining registration at a satellite communications system and related user terminals and systems
    Patent number: 6418314
    Abstract: Methods of registering a user terminal at a satellite communications system including a plurality of satellite spot beam transceivers, wherein each of the satellite spot beam transceivers defines a respective spot beam. The current spot beam registration information is transmitted from the user terminal to the satellite communications system. Updated spot beam registration information is determined for the user terminal at the satellite communications system based on the current spot beam registration information received from the user terminal. Updated spot beam registration information is transmitted from the satellite communications system to the user terminal. The user terminal updates the current spot beam registration information for the user terminal using the updated spot beam registration information received from the satellite communications system. Related systems and user terminals are also discussed.
    Type: Grant
    Filed: May 1, 1998
    Date of Patent: July 9, 2002
    Assignee: Ericsson Inc.
    Inventors: Hakan Lindvall, Javor Kolev
  • METHODS FOR DETERMINING REGISTRATION AT A SATELLITE COMMUNICATIONS SYSTEM AND RELATED USER TERMINALS AND SYSTEMS
    Publication number: 20010014605
    Abstract: Methods of registering a user terminal at a satellite communications system including a plurality of satellite spot beam transceivers, wherein each of the satellite spot beam transceivers defines a respective spot beam. The current spot beam registration information is transmitted from the user terminal to the satellite communications system. Updated spot beam registration information is determined for the user terminal at the satellite communications system based on the current spot beam registration information received from the user terminal. Updated spot beam registration information is transmitted from the satellite communications system to the user terminal. The user terminal updates the current spot beam registration information for the user terminal using the updated spot beam registration information received from the satellite communications system. Related systems and user terminals are also discussed.
    Type: Application
    Filed: May 1, 1998
    Publication date: August 16, 2001
    Inventors: HAKAN LINDVALL, JAVOR KOLEV
  • Methods and systems for reducing location update procedures in satellite communications systems
    Patent number: 6181932
    Abstract: A user terminal is registered with a satellite communications system including a plurality of satellite spot beam transmitters; wherein each of the satellite spot beam transmitters defines a respective spot beam. A periodic oscillation of two adjacent satellite spot beam transmitters results in a change of geographic coverage for the respective adjacent spot beams so that the user terminal can be alternatingly covered by the first and second spot beams when the user terminal is stationary. Upon determining that the user terminal is alternatingly covered by the first and second spot beams, the user terminal is registered with a spot beam pair for both the first and second adjacent spot beams and the spot beam pair registration is stored in the user terminal memory. Communications operations between the user terminal and the satellite communications system may be terminated and later re-established, whereupon the user terminal reregisters with the spot beam pair registration stored in memory.
    Type: Grant
    Filed: February 25, 1998
    Date of Patent: January 30, 2001
    Assignee: Ericsson Inc.
    Inventors: Javor Kolev, Richard Weiss, Hakan Lindvall