Patents by Inventor Takamitsu Senou

Takamitsu Senou 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).

  • Address translation method
    Patent number: 7630374
    Abstract: A translator includes a unit for communication with a DNS-ALG. The DNS-ALG detects a DNS query to a destination terminal, and performs once translation to IPv6. The DNS-ALG translates a destination temporary IPv6 address, in which a real address of IPv4 acquired from a DNS server of the destination terminal is added with a virtual IPv6 prefix, to a destination temporary IPv4. The IPv6-based DNS-ALG cooperates with the translator to permit alleviation of processing load on the DNS-ALG and reduction in capacity of a translation table of large capacity. A technique is disclosed which, with the above construction, can permit mutual connection among a plurality of VPN's without exchanging the existing VPN's.
    Type: Grant
    Filed: June 7, 2006
    Date of Patent: December 8, 2009
    Assignee: Hitachi, Ltd.
    Inventors: Hidenori Inouchi, Yukiko Takeda, Masaya Hayashi, Keisuke Takeuchi, Takamitsu Senou
  • Address translation method
    Publication number: 20060227780
    Abstract: A translator includes a unit for communication with a DNS-ALG. The DNS-ALG detects a DNS query to a destination terminal, and performs once translation to IPv6. The DNS-ALG translates a destination temporary IPv6 address, in which a real address of IPv4 acquired from a DNS server of the destination terminal is added with a virtual IPv6 prefix, to a destination temporary IPv4. The IPv6-based DNS-ALG cooperates with the translator to permit alleviation of processing load on the DNS-ALG and reduction in capacity of a translation table of large capacity. A technique is disclosed which, with the above construction, can permit mutual connection among a plurality of VPN's without exchanging the existing VPN's.
    Type: Application
    Filed: June 7, 2006
    Publication date: October 12, 2006
    Inventors: Hidenori Inouchi, Yukiko Takeda, Masaya Hayashi, Keisuke Takeuchi, Takamitsu Senou
  • Address translation method
    Patent number: 7085270
    Abstract: A translator includes a unit for communication with a DNS-ALG. The DNS-ALG detects a DNS query to a destination terminal, and performs once translation to IPv6. The DNS-ALG translates a destination temporary IPv6 address, in which a real address of IPv4 acquired from a DNS server of the destination terminal is added with a virtual IPv6 prefix, to a destination temporary IPv4. The IPv6-based DNS-ALG cooperates with the translator to permit alleviation of processing load on the DNS-ALG and reduction in capacity of a translation table of large capacity. A technique is disclosed which, with the above construction, can permit mutual connection among a plurality of VPN's without exchanging the existing VPN's.
    Type: Grant
    Filed: February 4, 2002
    Date of Patent: August 1, 2006
    Assignee: Hitachi, Ltd.
    Inventors: Hidenori Inouchi, Yukiko Takeda, Masaya Hayashi, Keisuke Takeuchi, Takamitsu Senou
  • Address translation method
    Publication number: 20030048804
    Abstract: A translator includes a unit for communication with a DNS-ALG. The DNS-ALG detects a DNS query to a destination terminal, and performs once translation to IPv6. The DNS-ALG translates a destination temporary IPv6 address, in which a real address of IPv4 acquired from a DNS server of the destination terminal is added with a virtual IPv6 prefix, to a destination temporary IPv4. The IPv6-based DNS-ALG cooperates with the translator to permit alleviation of processing load on the DNS-ALG and reduction in capacity of a translation table of large capacity. A technique is disclosed which, with the above construction, can permit mutual connection among a plurality of VPN's without exchanging the existing VPN's.
    Type: Application
    Filed: February 4, 2002
    Publication date: March 13, 2003
    Applicant: Hitachi, Ltd.
    Inventors: Hidenori Inouchi, Yukiko Takeda, Masaya Hayashi, Keisuke Takeuchi, Takamitsu Senou