Patents by Inventor Deokhoon Lee

Deokhoon Lee 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).

  • Handover method and apparatus based on history information in wireless networks
    Patent number: 8504037
    Abstract: A handover method in a plurality of wireless networks includes selecting one or more candidate networks from the plurality of wireless networks available to a mobile terminal of a user; calculating the latest connection time with a serving network currently serving the mobile terminal; deriving a history utility function based on the latest connection time; deriving system utility functions of the candidate networks in consideration of user and system environments; deriving selection functions for the candidate networks using the history utility function and the system utility functions; and selecting one of the candidate networks as a target network for handover using the selection functions. A target network for handover is selected using not only a system utility function reflecting user and system parameters but also a history utility function reflecting history information, thereby reducing the number of handovers and enhancing service quality.
    Type: Grant
    Filed: August 13, 2008
    Date of Patent: August 6, 2013
    Assignee: Korea Advanced Institute of Science and Technology (Kaist)
    Inventors: Tae Hoon Kim, Youngnam Han, Yonghoon Choi, Deokhoon Lee, Duck Hee Han
  • HANDOVER METHOD AND APPARATUS BASED ON HISTORY INFORMATION IN WIRELESS NETWORKS
    Publication number: 20100041404
    Abstract: A handover method in a plurality of wireless networks includes selecting one or more candidate networks from the plurality of wireless networks available to a mobile terminal of a user; calculating the latest connection time with a serving network currently serving the mobile terminal; deriving a history utility function based on the latest connection time; deriving system utility functions of the candidate networks in consideration of user and system environments; deriving selection functions for the candidate networks using the history utility function and the system utility functions; and selecting one of the candidate networks as a target network for handover using the selection functions. A target network for handover is selected using not only a system utility function reflecting user and system parameters but also a history utility function reflecting history information, thereby reducing the number of handovers and enhancing service quality.
    Type: Application
    Filed: August 13, 2008
    Publication date: February 18, 2010
    Applicant: RESEARCH AND INDUSTRIAL COOPERATION GROUP
    Inventors: Tae Hoon Kim, Youngnam Han, Yonghoon Choi, Deokhoon Lee, Duck Hee Han