Patents by Inventor Yu Sik Hahm

Yu Sik Hahm 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 for guaranteeing seamless quality of service in wireless internet
    Patent number: 7058017
    Abstract: In wireless Internet, a resource reservation path is established between a CH and a MH through an initial BS located in an initial cell where the MH is currently located. Pseudo reservation paths (PRPs) are established between the initial BS and its neighboring BSs, one PRP being established between the current BS and each of the neighboring BSs. Once the MH moves into one of the neighboring cells of the initial cell, a PRP established for a neighbor BS is activated. The activated PRP is concatenated with the established resource reservation path through the initial BS and the neighbor BS, thereby establishing an optimized resource reservation path.
    Type: Grant
    Filed: August 17, 2001
    Date of Patent: June 6, 2006
    Assignees: Information and Communications University Educational Foundation, Winsroad, Inc.
    Inventors: Kyoung Hee Lee, Yu Sik Hahm, Myung Chul Kim
  • Method for guaranteeing seamless quality of service in wireless internet
    Publication number: 20020024941
    Abstract: In wireless Internet, a resource reservation path is established between a CH and a MH through an initial BS located in an initial cell where the MH is currently located. Pseudo reservation paths (PRPs) are established between the initial BS and its neighboring BSs, one PRP being established between the current BS and each of the neighboring BSs. Once the MH moves into one of the neighboring cells of the initial cell, a PRP established for a neighbor BS is activated. The activated PRP is concatenated with the established resource reservation path through the initial BS and the neighbor BS, thereby establishing an optimized resource reservation path.
    Type: Application
    Filed: August 17, 2001
    Publication date: February 28, 2002
    Inventors: Kyoung Hee Lee, Yu Sik Hahm, Myung Chul Kim