Patents by Inventor Akihiko Kimoto

Akihiko Kimoto 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).

  • Path error monitoring method and apparatus thereof
    Patent number: 6920603
    Abstract: A path error monitoring method is provided for monitoring for an error in a communication path in a synchronous network by using an error detection code inserted into a first predetermined byte in the overhead of transmitted information. The method includes the steps of: performing an error detection code operation for a predetermined range of the transmitted information in a sender side; inserting the obtained error detection code into a second predetermined byte different from the first predetermined byte in the overhead of the transmitted information and sending the inserted transmitted information; performing an error detection code operation for a predetermined range of the inserted transmitted information received in a receiver side; and monitoring for an error in a communication path between the sender side and the receiver side by comparing the obtained error detection code with the second predetermined byte in the inserted transmitted information.
    Type: Grant
    Filed: June 25, 2003
    Date of Patent: July 19, 2005
    Assignee: Fujitsu Limited
    Inventor: Akihiko Kimoto
  • Path error monitoring method and apparatus thereof
    Publication number: 20040015770
    Abstract: A path error monitoring method is provided for monitoring for an error in a communication path in a synchronous network by using an error detection code inserted into a first predetermined byte in the overhead of transmitted information. The method includes the steps of: performing an error detection code operation for a predetermined range of the transmitted information in a sender side; inserting the obtained error detection code into a second predetermined byte different from the first predetermined byte in the overhead of the transmitted information and sending the inserted transmitted information; performing an error detection code operation for a predetermined range of the inserted transmitted information received in a receiver side; and monitoring for an error in a communication path between the sender side and the receiver side by comparing the obtained error detection code with the second predetermined byte in the inserted transmitted information.
    Type: Application
    Filed: June 25, 2003
    Publication date: January 22, 2004
    Inventor: Akihiko Kimoto
  • Path control method, a transmitter circuit, and a receiver circuit
    Publication number: 20030112463
    Abstract: A virtual concatenation transmission offers a correct data transmission even when a failure occurs in some of virtual concatenation paths, which is realized by eliminating data from failing paths at multiplexing and restoring original data, and by eliminating failing paths from paths through which data is transmitted.
    Type: Application
    Filed: April 18, 2002
    Publication date: June 19, 2003
    Inventor: Akihiko Kimoto