Patents by Inventor Shogo Sawamura

Shogo Sawamura 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 apparatus, communication system, and communication control method
    Patent number: 11381525
    Abstract: An apparatus includes a first port coupled to a first apparatus through a ring line, a second port coupled to a second apparatus through a second line, the second apparatus disposed external to the ring line, the second line configured redundantly with a first line between the first apparatus and the second apparatus, a third port coupled to the first apparatus through a control line for a control signal concerning the first line, and circuitry that detects a fault in the control line, wherein the circuitry detects a fault in the second line, switches the second line from an active line to a standby line in accordance with the detection of the fault in the second line, and while the fault in the control line is detected, shuts down the first port in accordance with the detection of the fault in the second line.
    Type: Grant
    Filed: December 10, 2019
    Date of Patent: July 5, 2022
    Assignee: FUJITSU LIMITED
    Inventors: Shogo Sawamura, Masayuki Ono, Masanori Kondo, Toshihide Tsuzuki
  • COMMUNICATION APPARATUS, COMMUNICATION SYSTEM, AND COMMUNICATION CONTROL METHOD
    Publication number: 20200204502
    Abstract: An apparatus includes a first port coupled to a first apparatus through a ring line, a second port coupled to a second apparatus through a second line, the second apparatus disposed external to the ring line, the second line configured redundantly with a first line between the first apparatus and the second apparatus, a third port coupled to the first apparatus through a control line for a control signal concerning the first line, and circuitry that detects a fault in the control line, wherein the circuitry detects a fault in the second line, switches the second line from an active line to a standby line in accordance with the detection of the fault in the second line, and while the fault in the control line is detected, shuts down the first port in accordance with the detection of the fault in the second line.
    Type: Application
    Filed: December 10, 2019
    Publication date: June 25, 2020
    Applicant: FUJITSU LIMITED
    Inventors: Shogo Sawamura, MASAYUKI ONO, Masanori KONDO, Toshihide Tsuzuki