Patents by Inventor Sang-Man Bak

Sang-Man Bak 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).

  • Session initiation protocol message routing method between IP networks using different IP address format
    Patent number: 9392029
    Abstract: Disclosed are the examples of an interworking system and related methods. The interworking system can be configured to implement a session initiation protocol (SIP) message routing method that may include checking a transmitting subject and a transmission method of a SIP message, applying a network address translation based on the checked message's transmitting subject and its transmission method, and specifying the address of the node selected based on the checked message's transmitting subject in routing path information.
    Type: Grant
    Filed: December 3, 2012
    Date of Patent: July 12, 2016
    Assignee: KT Corporation
    Inventors: Jang-won Lee, Ho-Jin Lee, Sang-Man Bak
  • System and method for decorating short message from origination point
    Patent number: 8509823
    Abstract: A method for converting a SMS sent through a mobile communication network into a SMS or MMS in a previously registered format includes the steps of: receiving a SMS from a certain sending subscriber, determining whether the corresponding sending subscriber is subscribed to a SMS converting service, then converting the SMS into a previously registered format in case the sending subscriber is subscribed to the SMS converting service, and then sending the converted message to a designated receiving terminal.
    Type: Grant
    Filed: September 25, 2006
    Date of Patent: August 13, 2013
    Assignee: KT Corporation
    Inventors: Sung-Ho Hwang, Myoung-Gyu Son, Kyung-Hoon Kim, Sang-Man Bak
  • Session initiation protocol message routing method between IP networks using different IP address format
    Patent number: 8346962
    Abstract: Disclosed are examples of an interworking system and related methods. The interworking system can be configured to implement a session initiation protocol (SIP) message routing method that may include checking a transmitting subject and a transmission method of a SIP message, applying a network address translation based on the checked message's transmitting subject and its transmission method, and specifying the address of the node selected based on the checked message's transmitting subject in routing path information.
    Type: Grant
    Filed: February 11, 2011
    Date of Patent: January 1, 2013
    Assignee: KT Corporation
    Inventors: Jang-Won Lee, Ho-Jin Lee, Sang-Man Bak
  • Inter working system
    Patent number: 8140707
    Abstract: Disclosed are examples of an interworking system. In some embodiments, the interworking system includes a STUN server and an application layer gateway (ALG) server. The STUN server can be configured to provide binding information. The application layer gateway (ALG) server can include an IP masquerading performer, a STUN client performer, an address translator and a determiner.
    Type: Grant
    Filed: April 24, 2007
    Date of Patent: March 20, 2012
    Assignee: KT Corporation
    Inventors: Jang-Won Lee, Ho-Jin Lee, Sang-Man Bak
  • INTERWORKING SYSTEM BETWEEN IP NETWORKS USING DIFFERENT IP ADDRESS FORMAT, APPLICATION LAYER GATEWAY (ALG) SERVER, STUN SERVER, NETWORK ADDRESS TRANSLATOR, INTERWORKING METHOD THEREOF, AND SIP MESSAGE ROUTING METHOD THEREOF
    Publication number: 20110191493
    Abstract: Disclosed are an interworking system between IP networks using different IP address format, an application layer gateway (ALG) server, a network address translator, an interworking method, and a SIP message routing method. The interworking system between a local network using a private IP and a public network using a public IP includes a STUN server and an application layer gateway (ALG) server. The STUN server provides binding information of header information of a public IP binding request. The application layer gateway (ALG) server performs a public IP binding request with header information changed by IP masquerading, and performs routing by applying the received binding information to media receiving address information of a SIP message.
    Type: Application
    Filed: February 11, 2011
    Publication date: August 4, 2011
    Applicant: KTFREETEL CO., LTD.
    Inventors: Jang-Won Lee, Ho-Jin Lee, Sang-Man Bak
  • INTER WORKING SYSTEM BETWEEN IP NETWORKS USING DIFFERENT IP ADDRESS FORMAT, APPLICATION LAYER GATEWAY (ALG) SERVER, STUN SERVER, NETWORK ADDRESS TRANSLATOR, INTERWORKING METHOD THEREOF, AND SIP MESSAGE ROUTING METHOD THEREOF
    Publication number: 20090180476
    Abstract: Disclosed are an interworking system between IP networks using different IP address format, an application layer gateway (ALG) server, a network address translator, an interworking method, and a SIP message routing method. The interworking system between a local network using a private IP and a public network using a public IP includes a STUN server and an application layer gateway (ALG) server. The STUN server provides binding information of header information of a public IP binding request. The application layer gateway (ALG) server performs a public IP binding request with header information changed by IP masquerading, and performs routing by applying the received binding information to media receiving address information of a SIP message.
    Type: Application
    Filed: April 24, 2007
    Publication date: July 16, 2009
    Inventors: Jang-Won Lee, Ho-Jin Lee, Sang-Man Bak
  • System and Method For Decorating Short Message From Origination Point
    Publication number: 20080254779
    Abstract: A method for converting a SMS sent through a mobile communication network into a SMS or MMS in a previously registered format includes the steps of: receiving a SMS from a certain sending subscriber, determining whether the corresponding sending subscriber is subscribed to a SMS converting service, then converting the SMS into a previously registered format in case the sending subscriber is subscribed to the SMS converting service, and then sending the converted message to a designated receiving terminal.
    Type: Application
    Filed: September 25, 2006
    Publication date: October 16, 2008
    Inventors: Sung-Ho Hwang, Myoung-Gyu Son, Kyung-Hoon Kim, Sang-Man Bak
  • Routing method for traffic load distribution in packet-switched network
    Publication number: 20020083194
    Abstract: The present invention relates to a routing method for a traffic load distribution in a packet-switched network.
    Type: Application
    Filed: December 15, 2000
    Publication date: June 27, 2002
    Inventors: Sang Man Bak, Ki Jin Baek, Chung I1 Kim