Patents by Inventor Ulrich Jetzek

Ulrich Jetzek 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).

  • Method and systems for dynamic threshold adjustment for handoffs in radio communication systems
    Patent number: 6754493
    Abstract: A method and system for performing handoffs in radiocommunication systems using adaptively variable thresholds are described. Adaptive thresholds are functions of the quality level of a best or worst transmission source in an active set. Ramp functions can be employed over a range of quality values within the adaptive threshold functions.
    Type: Grant
    Filed: December 15, 1999
    Date of Patent: June 22, 2004
    Assignee: Telefonaktiebolaget LM Ericsson
    Inventor: Ulrich Jetzek
  • System and method for estimating interfrequency measurements used for radio network function
    Patent number: 6546252
    Abstract: Systems and methods for estimating inter-frequency measurements used for radio network functions are disclosed. The systems and methods described allow systems to evaluate the quality of a second frequency by using offset adjusted measurements on a first frequency. By using the described methods, system capacity is increased by providing a “low cost” measurement mechanism for support of handover that substantially balance the load between two or more frequency bands. By using the proposed method, handover can be performed more frequently and the interference within each frequency band can therefore be kept at a more optimal level.
    Type: Grant
    Filed: December 15, 1999
    Date of Patent: April 8, 2003
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Ulrich Jetzek, Walter Müller, Lars B Johansson, Petter Blomberg, Peter Butovitsch
  • Methods and systems for controlling hard and soft handoffs in radio communications systems
    Patent number: 6539227
    Abstract: A method and system for controlling handoffs in radiocommunication systems using a softzone concept are described. Soft handoff is permitted between members of a particular softzone, but not between members of different softzones. Hard handoff is permitted between members of different softzones, but not between members of the same softzone.
    Type: Grant
    Filed: December 15, 1999
    Date of Patent: March 25, 2003
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Ulrich Jetzek, Petter Blomberg, Lars B. Johansson, Sture Jonsson, Peter Butovitsch