Patents by Inventor Tae-Hwan Um

Tae-Hwan Um 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).

  • Call set-up method using SIP-T overlap signaling
    Patent number: 7280532
    Abstract: In a call set-up method using SIP-T overlap signaling, rather than waiting for receiving every digit of a called number dialed by a caller, when digits capable of a number translation are received, a bearer channel connection is immediately performed so that a delay in transmission of a ring back tone can be prevented. In addition, in case of using a user data protocol (UDP) within an Internet protocol network in order to connect an originating PSTN and a terminating PSTN, INVITE messages are transmitted with some time difference, which makes it difficult for the terminating PSTN to know the transmission order of destination digits. In transmitting the messages using the UDP protocol, SIP “To” header lengths of the INVITE messages are compared in order to recognize a transmission order of the dialed digits. Therefore, more effective sequence delivery can be provided.
    Type: Grant
    Filed: July 3, 2002
    Date of Patent: October 9, 2007
    Assignee: LG Electronics Inc.
    Inventor: Tae-Hwan Um
  • Call set-up method using SIP-T overlap signaling
    Publication number: 20030007483
    Abstract: In a call set-up method using SIP-T overlap signaling, rather than waiting for receiving every digit of a called number dialed by a caller, when digits capable of a number translation are received, a bearer channel connection is immediately performed so that a delay in transmission of a ring back tone can be prevented. In addition, in case of using a user data protocol (UDP) within an Internet protocol network in order to connect an originating PSTN and a terminating PSTN, INVITE messages are transmitted with some time difference, which makes it difficult for the terminating PSTN to know the transmission order of destination digits. In transmitting the messages using the UDP protocol, SIP “To” header lengths of the INVITE messages are compared in order to recognize a transmission order of the dialed digits. Therefore, more effective sequence delivery can be provided.
    Type: Application
    Filed: July 3, 2002
    Publication date: January 9, 2003
    Applicant: LG Electronics Inc.
    Inventor: Tae-Hwan Um