Patents by Inventor Osamu Yoshihara

Osamu Yoshihara 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).

  • Patent number: 7796519
    Abstract: The aim of the present invention is to achieve a low delay and high bandwidth efficiency in an upstream bandwidth and to accurately reflect assured bandwidth in an actual transmitted bandwidth. To achieve this, in the present invention the maximum value and the transmission cycle of a requested bandwidth are set for each service class. The present invention allocates bandwidth to a service path terminating section based on excess allocated bandwidth and requested bandwidth of each service path terminating section. For each service path terminating section the present invention also selects one bandwidth out of a plurality of bandwidths requested by a service path terminating section in such a manner that the sum value of the allocated bandwidths of the plurality of service path terminating sections is within a predetermined range.
    Type: Grant
    Filed: September 6, 2002
    Date of Patent: September 14, 2010
    Assignee: Nippon Telegraph and Telephone Corporation
    Inventors: Osamu Yoshihara, Noriki Miki
  • Patent number: 7433312
    Abstract: In a P2MP system in which upstream bandwidth is shared by a plurality of ONUs, a dynamic bandwidth allocation circuit is provided which reduces the consumption of memory capacity, and avoids the divergence of parameters. A dynamic bandwidth allocation circuit provided in an optical line terminal (OLT) calculates, for each cycle and for each ONU, a target data size (targetj,k) which constitutes a target for allocated data size (allocatedj,k). Furthermore, taking the time constant of an exponential weighted moving average as ?, and taking ?=(??1)/(?+1), an ideal allocated data size (idealj,k) is calculated by idealj,k=targetj,k?(?/(1??))·excessj,k?1. Furthermore, an excess allocated data size (excessj,k) per one cycle is calculated by excessj,k=?·excessj,k?1+(1??)·(allocatedj,k?targetj,k). If idealj,k<0, the condition that bandwidth allocation is not granted is used for bandwidth allocation.
    Type: Grant
    Filed: December 21, 2004
    Date of Patent: October 7, 2008
    Assignee: Nippon Telegraph & Telephone Corporation of Japan
    Inventors: Osamu Yoshihara, Noriyuki Oota, Noriki Miki
  • Publication number: 20060176806
    Abstract: In a P2MP system in which upstream bandwidth is shared by a plurality of ONUs, a dynamic bandwidth allocation circuit is provided which reduces the consumption of memory capacity, and avoids the divergence of parameters. A dynamic bandwidth allocation circuit provided in an optical line terminal (OLT) calculates, for each cycle and for each ONU, a target data size (targetj,k) which constitutes a target for allocated data size (allocatedj,k). Furthermore, taking the time constant of an exponential weighted moving average as ?, and taking ?=(??1)/(?+1), an ideal allocated data size (idealj,k) is calculated by idealj,k=targetj,k?(?/(1??))·excessj,k?1. Furthermore, an excess allocated data size (excessj,k) per one cycle is calculated by excessj,k=?·excessj,k?1+(1??)·(allocatedj,k?targetj,k). If idealj,k<0, the condition that bandwidth allocation is not granted is used for bandwidth allocation.
    Type: Application
    Filed: December 21, 2004
    Publication date: August 10, 2006
    Applicant: Nippon Telegraph and Telephone Corporation
    Inventors: Osamu Yoshihara, Noriyuki Oota, Noriki Miki
  • Patent number: 6763565
    Abstract: A roll changing apparatus for a four-high rolling mill comprises rails, provided in a rolling mill stand and on a work side of the rolling mill, for incoming and outgoing of a work roll assembly and a backup roll assembly, and a pusher, provided on a drive side or the work side of the rolling mill, for roll admission and withdrawal for both of work rolls and backup rolls. The roll changing apparatus can be modified into a side shift type roll changing apparatus with ease, at a low cost, and in a short time.
    Type: Grant
    Filed: November 28, 2001
    Date of Patent: July 20, 2004
    Assignee: Mitsubishi Heavy Industries, Ltd.
    Inventors: Satoshi Mukaigawa, Mikio Yamamoto, Osamu Yoshihara
  • Publication number: 20030048805
    Abstract: The aim of the present invention is to achieve a low delay and high bandwidth efficiency in an upstream bandwidth and to accurately reflect assured bandwidth in an actual transmitted bandwidth. To achieve this, in the present invention the maximum value and the transmission cycle of a requested bandwidth are set for each service class. The present invention allocates bandwidth to a service path terminating section based on excess allocated bandwidth and requested bandwidth of each service path terminating section. For each service path terminating section the present invention also selects one bandwidth out of a plurality of bandwidths requested by a service path terminating section in such a manner that the sum value of the allocated bandwidths of the plurality of service path terminating sections is within a predetermined range.
    Type: Application
    Filed: September 6, 2002
    Publication date: March 13, 2003
    Applicant: Nippon Telegraph and Telephone Corporation
    Inventors: Osamu Yoshihara, Noriki Miki
  • Publication number: 20030024292
    Abstract: Hydraulic cylinders are provided in a housing so as to be opposed to roll chocks. Each of the hydraulic cylinders is constituted by movably fitting a thin plunger via a liner into a cylinder fixed to the housing, movably fitting a concave portion of the thin plunger over a center guide on the cylinder to form guide means, and connecting a liner for thrusting each of the roll chocks to a front end portion of the thin plunger.
    Type: Application
    Filed: July 11, 2002
    Publication date: February 6, 2003
    Inventors: Mikio Yamamoto, Susumu Oota, Osamu Yoshihara
  • Publication number: 20020078728
    Abstract: A roll changing apparatus for a four-high rolling mill comprises rails, provided in a rolling mill stand and on a work side of the rolling mill, for incoming and outgoing of a work roll assembly and a backup roll assembly, and a pusher, provided on a drive side or the work side of the rolling mill, for roll admission and withdrawal for both of work rolls and backup rolls. The roll changing apparatus can be modified into a side shift type roll changing apparatus with ease, at a low cost, and in a short time.
    Type: Application
    Filed: November 28, 2001
    Publication date: June 27, 2002
    Inventors: Satoshi Mukaigawa, Mikio Yamamoto, Osamu Yoshihara