Patents by Inventor Shikou Matsushima

Shikou Matsushima 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).

  • Packet transfer apparatus and packet transfer method
    Patent number: 8457012
    Abstract: Disclosed herewith is a packet transfer apparatus that carries out 1+1 protection switching for traffics to be received variably in both length and cycle. The apparatus enables flows to be multiplexed and the link usage efficiency to be improved without generating any buffer overflow errors. The data transfer apparatus, upon receiving the third sequentially numbered data from the first communication route before receiving the preceding second sequentially numbered data, stores the received third data in a buffer. And upon receiving the second sequentially numbered data from the second communication route, the apparatus sends the second and third data sequentially. Then, upon receiving the third sequentially numbered data from the second communication route before receiving the second sequentially numbered data, the apparatus sends the third data when a predetermined waiting time expires.
    Type: Grant
    Filed: March 10, 2008
    Date of Patent: June 4, 2013
    Assignee: Hitachi, Ltd.
    Inventors: Hideki Endo, Masayuki Takase, Shikou Matsushima, Akihiko Tanaka, Takayuki Kanno, Yoshihiro Ashi
  • Packet transfer apparatus and packet transfer method
    Publication number: 20090016366
    Abstract: Disclosed herewith is a packet transfer apparatus that carries out 1+1 protection switching for traffics to be received variably in both length and cycle. The apparatus enables flows to be multiplexed and the link usage efficiency to be improved without generating any buffer overflow errors. The data transfer apparatus, upon receiving the third sequentially numbered data from the first communication route before receiving the preceding second sequentially numbered data, stores the received third data in a buffer. And upon receiving the second sequentially numbered data from the second communication route, the apparatus sends the second and third data sequentially. Then, upon receiving the third sequentially numbered data from the second communication route before receiving the second sequentially numbered data, the apparatus sends the third data when a predetermined waiting time expires.
    Type: Application
    Filed: March 10, 2008
    Publication date: January 15, 2009
    Inventors: Hideki Endo, Masayuki Takase, Shikou Matsushima, Akihiko Tanaka, Takayuki Kanno, Yoshihiro Ashi