Patents by Inventor Mitsuru ASAYAMA

Mitsuru ASAYAMA 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).

  • Network system
    Patent number: 8416681
    Abstract: A network system having duplicate lines of a primary system and a backup system between a transmitter apparatus and a receiver apparatus is provided. Each of the transmitter apparatus and the receiver apparatus includes an arithmetic operator for conducting a BIP-8 arithmetic operation and a CRC arithmetic operation on an input signal and thereby detecting a bit error. The transmitter apparatus transmits data to both lines. The receiver apparatus includes a switcher. When a bit error is detected in received data of the primary system. the switcher switches control of the primary system and the backup system. Hitless protection switching of a VC path is executed.
    Type: Grant
    Filed: January 25, 2011
    Date of Patent: April 9, 2013
    Assignee: Hitachi, Ltd.
    Inventors: Yukihisa Tamura, Masatoshi Shibasaki, Mitsuru Asayama, Tsutomu Kawaizumi, Kenji Okamoto
  • NETWORK SYSTEM
    Publication number: 20110214008
    Abstract: A network system having duplicate lines of a primary system and a backup system between a transmitter apparatus and a receiver apparatus is provided. Each of the transmitter apparatus and the receiver apparatus includes an arithmetic operator for conducting a BIP-8 arithmetic operation and a CRC arithmetic operation on an input signal and thereby detecting a bit error. The transmitter apparatus transmits data to both lines. The receiver apparatus includes a switcher. When a bit error is detected in received data of the primary system. the switcher switches control of the primary system and the backup system.
    Type: Application
    Filed: January 25, 2011
    Publication date: September 1, 2011
    Inventors: YUKIHISA TAMURA, Masatoshi SHIBASAKI, Mitsuru ASAYAMA, Tsutomu KAWAIZUMI, Kenji OKAMOTO