Patents by Inventor Per-Arne Sandegren

Per-Arne Sandegren 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).

  • On-line notification in a mobile communications system
    Patent number: 6512930
    Abstract: A system notifies a first user of a mobile communication device about status of other users in a mobile communications system. The system sends a signal from the mobile communication device to a service node in the mobile communications system. At the service node, a list is determined indicating other users that the first user wants to know the status of. The status of each of the other users on the list is then determined, and transmitted from the service node to the mobile communication device. The signal from the mobile communication device to the service node may be generated in response to the mobile communication device being powered on, and may itself include an indication that the mobile communication device has been powered on.
    Type: Grant
    Filed: December 30, 1997
    Date of Patent: January 28, 2003
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventor: Per-Arne Sandegren
  • Method and apparatus for determining if a mobile station is present in an area
    Patent number: 6381457
    Abstract: A method and arrangement in a radio communication system for determining the presence of a mobile station in a determined area. A first radio channel is allocated for communication of control information and user data information between the mobile station and a first base station. The mobile station transmits identity information repeatedly on the first radio channel. A detecting unit receives at least one occurrence of the transmitted identity information. The mobile station is registered as present in the vicinity of the detecting unit upon receipt of said at least one occurrence of the identity information.
    Type: Grant
    Filed: April 7, 1999
    Date of Patent: April 30, 2002
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Göran Carlsson, Tomas Lundborg, Per-Arne Sandegren
  • ON-LINE NOTIFICATION IN A MOBILE COMMUNICATIONS SYSTEM
    Publication number: 20010044299
    Abstract: A system notifies a first user of a mobile communication device about status of other users in a mobile communications system. The system sends a signal from the mobile communication device to a service node in the mobile communications system. At the service node, a list is determined indicating other users that the first user wants to know the status of. The status of each of the other users on the list is then determined, and transmitted from the service node to the mobile communication device. The signal from the mobile communication device to the service node may be generated in response to the mobile communication device being powered on, and may itself include an indication that the mobile communication device has been powered on.
    Type: Application
    Filed: December 30, 1997
    Publication date: November 22, 2001
    Inventor: PER-ARNE SANDEGREN
  • Frequency packing for dynamic frequency allocation in a radiocommunication system
    Patent number: 6018663
    Abstract: In a telecommunications network, a method and apparatus for allocating channels include making signal quality measurements for channels that are in use or available for use and for channels that may become available for use. Spectral efficiency is enhanced by considering the exclusionary bandwidths associated with combiner filters tuned to currently allocated frequencies.
    Type: Grant
    Filed: January 28, 1997
    Date of Patent: January 25, 2000
    Assignee: Telefonaktiebolaget LM Ericsson
    Inventors: Patrik Karlsson, Per-Arne Sandegren