Patents by Inventor Ryohei Sekii

Ryohei Sekii 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).

  • Method and device for controlling virtually concatenated channels
    Patent number: 6667989
    Abstract: A method of controlling virtually concatenated channels includes the steps of a) distributing a signal to a plurality of channels in an SDH network so as to transmit the signal, and b) providing information at a predetermined position within each one of the channels or at predetermined positions within multi-frames containing an entirety of the channels, the information indicating whether a corresponding one of the channels is concatenated.
    Type: Grant
    Filed: April 28, 1999
    Date of Patent: December 23, 2003
    Assignee: Fujitsu Limited
    Inventors: Ryohei Sekii, Hiroshi Yoshida