Patents by Inventor Isaac Jian Liu

Isaac Jian 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).

  • Call transfer with multiple application servers in session initiation protocol-based network
    Patent number: 8774178
    Abstract: Call transfer techniques between multiple application servers in a SIP-based network or other type of communication network are disclosed. In accordance with one example technique of the invention, it is assumed that a first call is established between a first user device and a second user device via a first server, and the second user device, wishing to initiate a call transfer to a third user device, establishes a second call between itself and the third user device via a second server. Thus, the technique includes the following steps. Upon the first server receiving a call transfer request from the second user device such that the first user device and the third user device can communicate, it is determined whether the first server has information that matches the second call.
    Type: Grant
    Filed: July 30, 2007
    Date of Patent: July 8, 2014
    Assignee: Alcatel Lucent
    Inventors: Isaac Jian Liu, Ivy Qingfang Meng, Alexander Aihao Yin, Chun Yu Yu
  • CALL TRANSFER WITH MULTIPLE APPLICATION SERVERS IN SESSION INITIATION PROTOCOL-BASED NETWORK
    Publication number: 20090034516
    Abstract: Call transfer techniques between multiple application servers in a SIP-based network or other type of communication network are disclosed. In accordance with one example technique of the invention, it is assumed that a first call is established between a first user device and a second user device via a first server, and the second user device, wishing to initiate a call transfer to a third user device, establishes a second call between itself and the third user device via a second server. Thus, the technique includes the following steps. Upon the first server receiving a call transfer request from the second user device such that the first user device and the third user device can communicate, it is determined whether the first server has information that matches the second call.
    Type: Application
    Filed: July 30, 2007
    Publication date: February 5, 2009
    Inventors: Isaac Jian Liu, Ivy Qingfang Meng, Alexander Aihao Yin, Chu Yu Yu