Patents by Inventor Kouichi Asao

Kouichi Asao 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).

  • Communication network system and method for synchronously controlling path connection
    Patent number: 7035264
    Abstract: An ATM network for synchronously perform a path connection control at a plurality of nodes, wherein path control data are preliminarily supplied to the nodes from a network management system before a designated operation time. Each node generates a current time synchronously with a network synchronous clock, selects path control data by comparing the designated operation time of the control data with the current time, and autonomously executes a path connection control in accordance with the selected path control data.
    Type: Grant
    Filed: March 2, 2001
    Date of Patent: April 25, 2006
    Assignee: Hitachi, Ltd.
    Inventors: Takashi Seki, Yoshihiro Ashi, Takaaki Toyama, Yasuo Murakami, Kenichirou Tomizawa, Masao Nakayama, Kouichi Asao, Taichi Hiramatsu, Shuuichi Maruyama
  • Communication network system and method for synchronously controlling path connection
    Publication number: 20040213247
    Abstract: An ATM network for synchronously perform a path connection control at a plurality of nodes, wherein path control data are preliminarily supplied to the nodes from a network management system before a designated operation time. Each node generates a current time synchronously with a network synchronous clock, selects path control data by comparing the designated operation time of the control data with the current time, and autonomously executes a path connection control in accordance with the selected path control data.
    Type: Application
    Filed: March 2, 2001
    Publication date: October 28, 2004
    Inventors: Takashi Seki, Yoshihiro Ashi, Takaaki Toyama, Yasuo Murakami, Kenichirou Tomizawa, Masao Nakayama, Kouichi Asao, Taichi Hiramatsu, Shuuichi Maruyama
  • Communication node apparatus with routing tables in cache memories
    Patent number: 6553031
    Abstract: In a communication node apparatus comprising a plurality of line interfaces each having a cache memory with a sub routing table formed therein, and a route management unit having a main routing table, each of the line interfaces is provided with a function of detecting a disconnection flag included in a received packet and deleting an unnecessary routing information entry from the sub routing table, and a function of registering a routing information entry as a high priority entry if a connection establishment flag is set to a received packet when the routing information entry is downloaded from the main routing table to the sub routing table upon reception of the packet.
    Type: Grant
    Filed: August 11, 1999
    Date of Patent: April 22, 2003
    Assignee: Hitachi, Ltd.
    Inventors: Ryo Nakamura, Masao Nakayama, Kouichi Asao, Daisuke Okabe