Patents by Inventor Jun LJ Liu

Jun LJ Liu 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 and system for topology discovery in an SIP network
    Patent number: 8009585
    Abstract: A method for discovering topology in an SIP network is disclosed. According to the method, the SIP network is divided into domains governed by corresponding SIP proxies. A management system creates a topology agent for each SIP-domain and registers it with the governor proxy of each SIP-domain. Each topology agent generates topology-exploring messages to other agent and accumulates topology-exploring messages from other agents, gather routing information of the SIP network based on the collected topology-exploring messages to deduce topology of the SIP network.
    Type: Grant
    Filed: January 5, 2006
    Date of Patent: August 30, 2011
    Assignee: International Business Machines Corporation
    Inventors: Jun LJ Liu, Wei BJ Lu, Ben Bo Yang, Chun Ying, Qing Bo Wang
  • Method and system for topology discovery in an SIP network
    Publication number: 20090103451
    Abstract: A method for discovering topology in an SIP network is disclosed. According to the method, the SIP network is divided into domains governed by corresponding SIP proxies. A management system creates a topology agent for each SIP-domain and registers it with the governor proxy of each SIP-domain. Each topology agent generates topology-exploring messages to other agent and accumulates topology-exploring messages from other agents, gather routing information of the SIP network based on the collected topology-exploring messages to deduce topology of the SIP network.
    Type: Application
    Filed: January 5, 2006
    Publication date: April 23, 2009
    Applicant: International Business Machines Corporation
    Inventors: Jun LJ Liu, Wei BJ Lu, Ben Bo Yang, Chun Ying, Qing Bo Wang