Patents by Inventor Yongliang Xu

Yongliang Xu 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).

  • Publication number: 20080031619
    Abstract: A method for recovering from an inter-domain link failure includes: initiating a local recovery, by an upstream node of a failed inter-domain link, a local recovery from the link failure; performing the local recovery from the link failure with the upstream node of the failed inter-domain link as a source node and a downstream node of the failed inter-domain link as a destination node. A device for recovering from an inter-domain link failure includes: a link resource manager, adapted to detect an inter-domain link failure; a connection controller, adapted to inquire for a recovery path to a downstream node, and notifies a protocol controller to establish the recovery path; the protocol controller, adapted to establish the recovery path.
    Type: Application
    Filed: July 27, 2007
    Publication date: February 7, 2008
    Inventors: Huiying Xu, Yongliang Xu
  • Publication number: 20070286069
    Abstract: A method for implementing working/standby transmission path includes steps: setting a standby LSP for each physical transmission link in Data Communication Network (DCN); and when the physical transmission link fails, transmitting the packets that need to be transmitted on the physical transmission link to the standby LSP to transfer. The present invention can enhance the packet transmission reliability of DCN and reduce the maintenance workload and complexity of the working/standby transmission path.
    Type: Application
    Filed: August 2, 2007
    Publication date: December 13, 2007
    Applicant: HUAWEI TECHNOLOGIES CO., LTD.
    Inventor: Yongliang Xu
  • Publication number: 20060268944
    Abstract: This invention discloses a method for migration between a permanent connection and a switched connection in a transmission network. The method comprises the steps of: the ingress node of the current connection receiving a message of connection migrating request; forwarding the message of connection migrating request node by node starting from the ingress node in the direction of the traffic signal transmission of the current connection till the egress node of the current connection; making migration between the two connection modes until the ingress node after the message of migrating request has been received. By making migration between modes of connection node by node at each node of a transmission network, this invention ensures a smooth transition between a permanent connection and a switched connection, effectively avoiding service disruption while making the implementation of network services more flexible.
    Type: Application
    Filed: April 8, 2004
    Publication date: November 30, 2006
    Inventor: Yongliang Xu
  • Publication number: 20040151159
    Abstract: A method of establishing a bi-directional Label Switched Path (LSP) in an optical network includes a bi-directional LSP establishing request as well as available upstream label set and available downstream label set are sent from the first node to the terminal node of the bi-directional LSP in a node-by-node manner. If the available upstream label set or the available downstream label set obtained by the terminal node or other nodes before the terminal node is null, the bi-directional LSP can't be established; if the bi-directional LSP establishing request is sent to the terminal node and both the received available upstream label set and available downstream label set are not null, the terminal node will choose an acceptable upstream label and an acceptable downstream label from the received available upstream label set and available downstream label set.
    Type: Application
    Filed: December 29, 2003
    Publication date: August 5, 2004
    Applicant: HUAWEI TECHNOLOGIES CO., LTD.
    Inventor: Yongliang Xu