Patents by Inventor Chul Hoi Koo

Chul Hoi Koo 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 apparatus of performing cell reselection procedure in wireless communication system
    Patent number: 8340671
    Abstract: A method and an apparatus of performing a cell reselection procedure in a wireless communication system are provided. The method includes starting a first reselection timer if a signal property value of a first neighbor cell with a higher priority than a serving cell is increased to above a threshold, starting a first delay timer if a second reselection timer that is a reselection timer of a second neighbor cell with a higher priority than the first neighbor cell is running at the expiry of the first reselection timer, reselecting the second neighbor cell as a suitable cell if the second reselection timer expires before the expiry of the first delay timer, and reselecting the first neighbor cell as the suitable cell if the first delay timer expires before the expiry of the second reselection timer.
    Type: Grant
    Filed: September 10, 2009
    Date of Patent: December 25, 2012
    Assignee: LG Electronics Inc.
    Inventors: Ji Woong Lee, Chul Hoi Koo, Yung-Mi Kim, Jin Sook Ryu, Hyounhee Koo
  • Method and apparatus for handling abnormal situation in EGPRS system
    Patent number: 8249008
    Abstract: A method and apparatus for an enhanced general packet radio service (EGPRS) system is provided. A plurality of temporary block flows (TBFs) are established or reconfigured. If fast ACK/NACK reporting (FANR) activation for one TBF is inconsistent with FANR activation for another TBF, the allocated TBFs are aborted.
    Type: Grant
    Filed: September 22, 2009
    Date of Patent: August 21, 2012
    Assignee: LG Electronics Inc.
    Inventors: Jin Sook Ryu, Ji Woong Lee, Yung Mi Kim, Chul Hoi Koo, Hyounhee Koo
  • Method and apparatus of performing cell reselection procedure in wireless communication system
    Publication number: 20100093356
    Abstract: A method and an apparatus of performing a cell reselection procedure in a wireless communication system are provided. The method includes starting a first reselection timer if a signal property value of a first neighbor cell with a higher priority than a serving cell is increased to above a threshold, starting a first delay timer if a second reselection timer that is a reselection timer of a second neighbor cell with a higher priority than the first neighbor cell is running at the expiry of the first reselection timer, reselecting the second neighbor cell as a suitable cell if the second reselection timer expires before the expiry of the first delay timer, and reselecting the first neighbor cell as the suitable cell if the first delay timer expires before the expiry of the second reselection timer.
    Type: Application
    Filed: September 10, 2009
    Publication date: April 15, 2010
    Inventors: Ji Woong Lee, Chul Hoi Koo, Yung-Mi Kim, Jin Sook Ryu, Hyounhee Koo
  • Method and apparatus for handling abnormal situation in EGPRS system
    Publication number: 20100074104
    Abstract: A method and apparatus for an enhanced general packet radio service (EGPRS) system is provided. A plurality of temporary block flows (TBFs) are established or reconfigured. If fast ACK/NACK reporting (FANR) activation for one TBF is inconsistent with FANR activation for another TBF, the allocated TBFs are aborted.
    Type: Application
    Filed: September 22, 2009
    Publication date: March 25, 2010
    Inventors: Jin Sook Ryu, Ji Woong Lee, Yung Mi Kim, Chul Hoi Koo, Hyounhee Koo