Patents by Inventor Hwan-Chul Ryu

Hwan-Chul Ryu 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).

  • Patent number: 8498264
    Abstract: Disclosed is a session handoff method of an access terminal (AT) in a high-rate packet data (HRPD) mobile communication system. The session handoff method comprises performing a close procedure of a session in negotiation upon receiving a close request for a session negotiation from the AT performing session handoff; allocating a new unicast access terminal identifier (UATI) to the AT upon receiving a request for allocation of a new UATI from the AT after the session close procedure; and acquiring prior session information from a source session controller using an old UATI included in received prior session information upon receiving configuration information including the prior session information from the AT after allocating a new UATI to the AT.
    Type: Grant
    Filed: February 26, 2004
    Date of Patent: July 30, 2013
    Assignee: Samsung Electronics Co., Ltd.
    Inventor: Hwan-Chul Ryu
  • Publication number: 20060274692
    Abstract: Disclosed is a session handoff method of an access terminal (AT) in a high-rate packet data (HRPD) mobile communication system. The session handoff method comprises performing a close procedure of a session in negotiation upon receiving a close request for a session negotiation from the AT performing session handoff; allocating a new unicast access terminal identifier (UATI) to the AT upon receiving a request for allocation of a new UATI from the AT after the session close procedure; and acquiring prior session information from a source session controller using an old UATI included in received prior session information upon receiving configuration information including the prior session information from the AT after allocating a new UATI to the AT.
    Type: Application
    Filed: February 26, 2004
    Publication date: December 7, 2006
    Inventor: Hwan-Chul Ryu
  • Publication number: 20010006890
    Abstract: A method for providing the information inquired by a mobile terminal subscriber via an information service center having a voice recognition function. When a call is set up between the information service center and a mobile terminal, the information service center transmits an outgoing message to the mobile terminal. In response, the mobile terminal transmits a voice response in response to the outgoing message from the information service center. The information service center recognizes the user's voice and searches a specific information corresponding to the recognized voice. The information service center transmits the searched information in voice signal to the mobile terminal. The mobile terminal outputs the searched information provided from the information service center, and transmits a request for character information of the searched information to the information service center as occasion demands.
    Type: Application
    Filed: December 19, 2000
    Publication date: July 5, 2001
    Applicant: SAMSUNG ELECTRONIC CO., LTD.
    Inventor: Hwan-Chul Ryu