Patents by Inventor Hirotaka UJIKAWA

Hirotaka UJIKAWA 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).

  • Publication number: 20220210718
    Abstract: A signal forwarding system includes: a plurality of signal forwarding devices forming a plurality of communication routes between a slave station and a master station; and a route control device that determines a communication route, wherein the route control device includes at least: a communication route calculation unit that calculates a communication route in response to a route switching request; and a forward destination setting instruction unit that outputs forward destination setting information based on the communication route, the signal forwarding devices include at least: a forward destination setting instruction acquisition unit that acquires the forward destination setting information; a forward destination set unit that changes a forward destination based on the forward destination setting information; and a forward unit that outputs input traffic based on the forward destination, and any of the route control device and the signal forwarding devices includes: a traffic monitor unit; a non-signa
    Type: Application
    Filed: March 26, 2020
    Publication date: June 30, 2022
    Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Naotaka SHIBATA, Hiroyuki UZAWA, Hirotaka UJIKAWA, Yoichi FUKADA, Jun TERADA
  • Patent number: 11360758
    Abstract: A communication processing device including: a memory that stores data relating to a pre-update firmware, and second data relating to a post-update firmware, and that stores first reference destination address indicating the storage area of reference destination included in the first data in association with the reference destination; a rewriting unit configured to rewrite at least some of the first reference destination address stored in the memory with second reference destination address indicating the storage area of the reference destination in the second data; and a control unit configured to, when referring to the reference destination in the first data, refer to the second data on the basis of the second reference destination address stored in the memory.
    Type: Grant
    Filed: February 28, 2018
    Date of Patent: June 14, 2022
    Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Takumi Harada, Hirotaka Ujikawa, Manabu Yoshino, Noriyuki Oota, Kenichi Suzuki
  • Publication number: 20220150042
    Abstract: A communication system includes a first processor that performs processing for transmitting a signal to and receiving a signal from a communication destination device and a second processor that performs processing of an additional function. The second processor includes a decoding unit that decodes a transmission signal encoded by the first processor or a reception signal encoded by the communication destination device, an information acquiring unit that acquires information from the transmission signal or the reception signal decoded by the decoding unit, an additional function executing unit that performs the processing of the additional function using the information acquired by the information acquiring unit, and an encoding unit that performs processing for encoding the decoded transmission signal and outputting a resulting signal to the communication destination device or processing for encoding the decoded reception signal and outputting a resulting signal to the first processor.
    Type: Application
    Filed: March 2, 2020
    Publication date: May 12, 2022
    Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Takahiro SUZUKI, Noriyuki OTA, Hiroyuki UZAWA, Hirotaka UJIKAWA
  • Publication number: 20220021617
    Abstract: A communication system includes a subscriber network unit and a communication device provided in an accommodating station. The subscriber network unit includes an acquisition unit that acquires uplink data from one or more lower-layer devices. The communication device includes: a data processing unit that acquires the uplink data from the subscriber network unit using a band of uplink communication and executes data processing on the acquired uplink data; a policy determination unit that determines a policy of band allocation of the uplink communication on the basis of the result of the data processing; and an allocation control unit that allocates the band of the uplink communication to the subscriber network unit on the basis of the policy.
    Type: Application
    Filed: December 4, 2019
    Publication date: January 20, 2022
    Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Yumiko SENOO, Takahiro SUZUKI, Junichi KANI, Hirotaka UJIKAWA
  • Publication number: 20210112016
    Abstract: A transfer apparatus include a distribution unit, a storage unit, and a transfer unit, in which the distribution unit is configured to identify a plurality of networks to which frames belong, distribute the frames for each of the networks based on an identification result, and store the distributed frames in the storage unit, the storage unit is configured to store information of a time at which a frame of the frames is stored in the storage unit and the frame in association with each other, and the transfer unit is configured to detect a period of time for which the frame stays in the storage unit, detect a remaining period to send which is a remaining time of a time for which the frame is permitted to stay in the storage unit, for each of the frames, based on a difference between the time for which the frame stays in the storage unit and the delay upper limit value, and output the frame to a predetermined apparatus based on the remaining period to send.
    Type: Application
    Filed: May 8, 2019
    Publication date: April 15, 2021
    Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Rintaro HARADA, Hiroyuki UZAWA, Hirotaka NAKAMURA, Daisuke HISANO, Hirotaka UJIKAWA, Jun TERADA
  • Patent number: 10958349
    Abstract: A virtual subscriber line terminal station device includes a software component including software to be added in accordance with a service requirement; and hardware having general-purpose functions; wherein the hardware includes a communication unit that receives a bandwidth allocation request transmitted by a subscriber line termination device; and the software component includes a bandwidth allocation component. The bandwidth allocation component has an individual unit that, based on an algorithm for allocating bands, computes a bandwidth to be allocated to the subscriber line termination device that transmitted the bandwidth allocation request; a common unit that, in accordance with the bandwidth allocated by the individual unit, allocates the bandwidth to the subscriber line termination device; and an interface between the individual unit and the common unit. The common unit converts the bandwidth allocation request received by the communication unit to a format that can be used by the individual unit.
    Type: Grant
    Filed: July 19, 2018
    Date of Patent: March 23, 2021
    Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Hirotaka Ujikawa, Noriyuki Oota, Kota Asaka
  • Publication number: 20200177280
    Abstract: A virtual subscriber line terminal station device includes a software component including software to be added in accordance with a service requirement; and hardware having general-purpose functions; wherein the hardware includes a communication unit that receives a bandwidth allocation request transmitted by a subscriber line termination device; and the software component includes a bandwidth allocation component. The bandwidth allocation component has an individual unit that, based on an algorithm for allocating bands, computes a bandwidth to be allocated to the subscriber line termination device that transmitted the bandwidth allocation request; a common unit that, in accordance with the bandwidth allocated by the individual unit, allocates the bandwidth to the subscriber line termination device; and an interface between the individual unit and the common unit. The common unit converts the bandwidth allocation request received by the communication unit to a format that can be used by the individual unit.
    Type: Application
    Filed: July 19, 2018
    Publication date: June 4, 2020
    Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Hirotaka UJIKAWA, Noriyuki OOTA, Kota ASAKA
  • Publication number: 20190377569
    Abstract: A communication processing device including: a memory that stores data relating to a pre-update firmware, and second data relating to a post-update firmware, and that stores first reference destination address indicating the storage area of reference destination included in the first data in association with the reference destination; a rewriting unit configured to rewrite at least some of the first reference destination address stored in the memory with second reference destination address indicating the storage area of the reference destination in the second data; and a control unit configured to, when referring to the reference destination in the first data, refer to the second data on the basis of the second reference destination address stored in the memory.
    Type: Application
    Filed: February 28, 2018
    Publication date: December 12, 2019
    Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Takumi HARADA, Hirotaka UJIKAWA, Manabu YOSHINO, Noriyuki OOTA, Kenichi SUZUKI