Patents by Inventor Xiaofeng Song

Xiaofeng Song 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).

  • Method of multicast source filtering
    Patent number: 7593402
    Abstract: A method for filtering multicast sources, so that when the multicast routing protocol is based on the Source-Specific Multicast (SSM) model, resource consumption of inquiry routers can be reduced and the multicast packet forwarding efficiency can be improved. In the present invention, the inquiry router determines whether it is the Any-Source Multicast (ASM) model or the SSM model that the multicast routing protocol running in the network is based on. If it is the ASM model, maintain the source filtering method in the related art. If it is the SSM model, cancel the source filtering process or only performing the source filtering process in the inclusive mode. In the situation that only the source filtering process in the inclusive mode is performed, the additional filtering mode switching function or static configuration by software guarantees that the inquiry router is only in the inclusive mode, thereby avoiding the mode switching.
    Type: Grant
    Filed: September 8, 2006
    Date of Patent: September 22, 2009
    Assignee: Huawei Technologies Co., Ltd.
    Inventors: Xiaofeng Song, Xiaodan Chen, Hongke Zhang, Enhui Liu
  • Method of multicast source filtering
    Publication number: 20070064695
    Abstract: A method for filtering multicast sources, so that when the multicast routing protocol is based on the Source-Specific Multicast (SSM) model, resource consumption of inquiry routers can be reduced and the multicast packet forwarding efficiency can be improved. In the present invention, the inquiry router determines whether it is the Any-Source Multicast (ASM) model or the SSM model that the multicast routing protocol running in the network is based on. If it is the ASM model, maintain the source filtering method in the related art. If it is the SSM model, cancel the source filtering process or only performing the source filtering process in the inclusive mode. In the situation that only the source filtering process in the inclusive mode is performed, the additional filtering mode switching function or static configuration by software guarantees that the inquiry router is only in the inclusive mode, thereby avoiding the mode switching.
    Type: Application
    Filed: September 8, 2006
    Publication date: March 22, 2007
    Applicant: HUAWEI TECHNOLOGIES CO., LTD.
    Inventors: Xiaofeng Song, Xiaodan Chen, Hongke Zhang, Enhui Liu
  • Digital camera
    Patent number: D561230
    Type: Grant
    Filed: January 11, 2007
    Date of Patent: February 5, 2008
    Assignee: Sony Corporation
    Inventor: Xiaofeng Song
  • Combined disc player and radio
    Patent number: D619993
    Type: Grant
    Filed: September 4, 2009
    Date of Patent: July 20, 2010
    Assignee: Sony Corporation
    Inventor: Xiaofeng Song
  • Audio player
    Patent number: D629013
    Type: Grant
    Filed: February 12, 2010
    Date of Patent: December 14, 2010
    Assignee: Sony Corporation
    Inventors: Xiaofeng Song, Takuro Hibino