Patents by Inventor Hiroshi Kazami

Hiroshi Kazami 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).

  • Proxy server, communication system, communication method and program
    Patent number: 8374079
    Abstract: A proxy server in an SIP network includes the common SIP proxy server function 11, the function of determining whether an SIP request and an SIP response received by the proxy server 10 belong to a call flow encountering a failure of the working SIP server 30, and the function of, when determination is made that they belong to a call flow encountering a failure, referring to the contents of the received SIP request and SIP response to specify a destination to which the SIP request and the SIP response are to be transmitted next.
    Type: Grant
    Filed: October 19, 2007
    Date of Patent: February 12, 2013
    Assignee: NEC Corporation
    Inventors: Motohiro Suzuki, Hiroshi Kazami
  • PROXY SERVER, COMMUNICATION SYSTEM, COMMUNICATION METHOD AND PROGRAM
    Publication number: 20100074100
    Abstract: A proxy server in an SIP network includes the common SIP proxy server function 11, the function of determining whether an SIP request and an SIP response received by the proxy server 10 belong to a call flow encountering a failure of the working SIP server 30, and the function of, when determination is made that they belong to a call flow encountering a failure, referring to the contents of the received SIP request and SIP response to specify a destination to which the SIP request and the SIP response are to be transmitted next.
    Type: Application
    Filed: October 19, 2007
    Publication date: March 25, 2010
    Inventors: Motohiro Suzuki, Hiroshi Kazami
  • PROXY SERVER, COMMUNICATION SYSTEM, COMMUNICATION METHOD AND PROGRAM
    Publication number: 20090262724
    Abstract: Provided in a proxy server which enables a plurality of SIP servers to copy registration information after presenting, to an SIP server requesting SIP Digest authentication, properness of one who makes an access and of a REGISTER request to be transmitted. With a REGISTER request generation function provided in addition to a function that a common SIP proxy server holds, a proxy server disposed between a user agent and an SIP server generates a REGISTER request to a spare SIP server and transmits the same to the spare SIP server, thereby realizing registration information copying, and holds a user identifier and a password of the proxy server to execute Digest authentication with the spare SIP server. Moreover, after confirming a REGISTER request processing completion response (200 OK) from a working SIP server from which registration information is copied, the proxy server transmits a copied REGISTER request to the spare SIP server.
    Type: Application
    Filed: August 14, 2007
    Publication date: October 22, 2009
    Applicant: NEC CORPORATION
    Inventors: Motohiro Suzuki, Hiroshi Kazami, Kunihiro Taniguchi