Patents by Inventor William Jin Ho Song

William Jin Ho Song 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).

  • Data forwarding method and system for vertical handover
    Patent number: 9078183
    Abstract: A data forwarding method and system is provided for avoiding data loss during a vertical handover by forwarding data through an IP tunnel established between a newly introduced network entity called a Data Forwarding Function of the serving network and a Forward Attachment Function of a target network. A data forwarding method of a data forwarding unit located in a serving network for a vertical handover according to the present invention includes receiving an address of a forwarding attachment unit located in a target network and a data forwarding preparation request that are transmitted by a user equipment; establishing an Internet Protocol (IP) tunnel to the forwarding attachment unit according to the data forwarding preparation request; and forwarding, when a vertical handover is initiated, handover packets to the forwarding attachment unit through the IP tunnel.
    Type: Grant
    Filed: October 29, 2009
    Date of Patent: July 7, 2015
    Assignees: Samsung Electronics Co., Ltd., Industry-Academic Cooperation Foundation, Yonsei University
    Inventors: Chae Gwon Lim, Tae Sun Yeoum, Sung Ho Choi, Jong Moon Chung, William Jin Ho Song, Dae Young Lee
  • DATA FORWARDING METHOD AND SYSTEM FOR VERTICAL HANDOVER
    Publication number: 20110211559
    Abstract: A data forwarding method and system is provided for avoiding data loss during a vertical handover by forwarding data through an IP tunnel established between a newly introduced network entity called a Data Forwarding Function of the serving network and a Forward Attachment Function of a target network. A data forwarding method of a data forwarding unit located in a serving network for a vertical handover according to the present invention includes receiving an address of a forwarding attachment unit located in a target network and a data forwarding preparation request that are transmitted by a user equipment; establishing an Internet Protocol (IP) tunnel to the forwarding attachment unit according to the data forwarding preparation request; and forwarding, when a vertical handover is initiated, handover packets to the forwarding attachment unit through the IP tunnel.
    Type: Application
    Filed: October 29, 2009
    Publication date: September 1, 2011
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Chae Gwon Lim, Tae Sun Yeoum, Sung Ho Choi, Jong Moon Chung, William Jin Ho Song, Dae Young Lee