Patents by Inventor Ko-Ching Wu

Ko-Ching Wu 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).

  • System and method for supporting inter-NAT-domain handoff in a VPN by associating L2TP and mobile IP
    Patent number: 7333453
    Abstract: The present invention relates to a system and method for supporting inter-NAT-domain handoff in a VPN by associating L2TP and mobile IP. A mobile node is able to roam from an Intranet to a foreign network, and implement a VPN by L2TP. The Intranet has a VPN gateway and a home agent corresponding to the mobile node. The foreign network has a NAT gateway. An L2TP (PPP) tunnel passing the NAT gateway is established between the mobile node in the foreign network and the VPN gateway. The L2TP (PPP) tunnel has a first terminal on the VPN gateway, with an address set to the home agent's IP address, and a second terminal on the mobile node, with an address set to the mobile node's CoA.
    Type: Grant
    Filed: April 27, 2004
    Date of Patent: February 19, 2008
    Assignee: Industrial Technology Research Institute
    Inventors: Ko-Ching Wu, Da-Jiun Chou, Jung-Hsuan Fan, Jen-Shun Yang, Chien-Chao Tseng
  • System and method for connection handover in a virtual private network
    Publication number: 20060176852
    Abstract: A method and system of connection handover from a first wireless server to a second wireless server in a connection between a mobile device and an intranet. The method comprises employing a SIM-based pre-authentication with a mobile agent of the mobile device prior to handing over the connection to the second wireless server, and handing over the connection to the second wireless server upon a predetermined condition.
    Type: Application
    Filed: September 9, 2005
    Publication date: August 10, 2006
    Inventors: Ko-Ching Wu, Jen-Shun Yang, Chen-Hau Lin
  • System and method for supporting inter-NAT-domain handoff in a VPN by associating L2TP and mobile IP
    Publication number: 20050128979
    Abstract: The present invention relates to a system and method for supporting inter-NAT-domain handoff in a VPN by associating L2TP and mobile IP. A mobile node is able to roam from an Intranet to a foreign network, and implement a VPN by L2TP. The Intranet has a VPN gateway and a home agent corresponding to the mobile node. The foreign network has a NAT gateway. An L2TP (PPP) tunnel passing the NAT gateway is established between the mobile node in the foreign network and the VPN gateway. The L2TP (PPP) tunnel has a first terminal on the VPN gateway, with an address set to the home agent's IP address, and a second terminal on the mobile node, with an address set to the mobile node's CoA.
    Type: Application
    Filed: April 27, 2004
    Publication date: June 16, 2005
    Applicant: Industrial Technology Research Institute
    Inventors: Ko-Ching Wu, Da-Jiun Chou, Jung-Hsuan Fan, Jen-Shun Yang, Chien-Chao Tseng