Patents by Inventor Shuching Shieh

Shuching Shieh 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: 6721318
    Abstract: A router is configured with a static membership to a multicast group address and is capable of transmitting a message reporting the static membership to another router.
    Type: Grant
    Filed: July 29, 1999
    Date of Patent: April 13, 2004
    Assignee: Nortel Networks Limited
    Inventors: Xiangrong Cai, Shuching Shieh
  • Patent number: 6597703
    Abstract: A system, device, and method for reducing multicast forwarding states in a multicast communication system maintains forwarding states in such a way that the non-default forwarding states have non-overlapping source address ranges. Each forwarding state is associated with a source address range encompassing one or more source addresses. When a non-default forwarding state is installed, the source address range for the forwarding state is selected so that the source address range does not overlap with the source address ranges of any other non-default forwarding states. The source address range for a particular forwarding state may be adjusted as new routes are learned or existing routes are changed or aged.
    Type: Grant
    Filed: November 29, 1999
    Date of Patent: July 22, 2003
    Assignee: Nortel Networks Limited
    Inventors: Yunzhou Li, Shuching Shieh
  • Patent number: 6526054
    Abstract: A system, device, and method for transitioning from DVMRP to BGMP for interdomain multicast routing over the Internet multicast backbone (Mbone) switches the Mbone DVMRP distribution tree, piece by piece, into BGMP distribution trees. Each piece is a contiguous BGMP regional tree. The routers in the regional BGMP tree run an extended BGMP protocol. The root of the regional BGMP tree also runs DVMRP, and joins the Mbone DVMRP distribution tree in order to receive multicast packets and forward the multicast packets over the regional BGMP tree. The extended BGMP protocol ensures that no fowarding loops are created between the Mbone DVMRP distribution tree and the regional BGMP tree.
    Type: Grant
    Filed: June 28, 1999
    Date of Patent: February 25, 2003
    Assignee: Nortel Networks Limited
    Inventors: Yunzhou Li, Billy C. Ng, Shuching Shieh
  • Patent number: 6320874
    Abstract: A method, translating apparatus, apparatus comprising a computer readable medium, and system for establishing and terminating an end-to-end connection in a mixed protocol communication network includes a translation function that communicates with a first device using a first communication protocol and a second device using a second communication protocol. In order to establish an end-to-end connection, the translation function receives a first control message from the second device initiating a connection between the second device and the translation function, completes a connection establishment procedure with the second device, receives a first data message from the second device, and transmits a second data message to the first device.
    Type: Grant
    Filed: October 7, 1998
    Date of Patent: November 20, 2001
    Assignee: Nortel Networks Limited
    Inventors: Richard Crump, Mark F. Leary, Ellis L. Wong, Donald F. Betsinger, Shuching Shieh
  • Patent number: 6226676
    Abstract: A method, translating apparatus, apparatus comprising a computer readable medium, and system for establishing and terminating an end-to-end connection in a mixed protocol communication network includes a translation function that communicates with a first device using a first communication protocol and a second device using a second communication protocol. In order to establish an end-to-end connection, the translation function receives a first data message from the first device, establishes a connection with the second device, and transmits a second data message to the second device. In order to terminate an end-to-end connection, the translation function receives a reset message from the first device, terminates the connection with the second device, and transmits a reset confirmation message to the first device.
    Type: Grant
    Filed: October 7, 1998
    Date of Patent: May 1, 2001
    Assignee: Nortel Networks Corporation
    Inventors: Richard Crump, Mark F. Leary, Ellis L. Wong, Donald F. Betsinger, Shuching Shieh