Patents by Inventor Yoshiaki Ohta

Yoshiaki Ohta 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: 20190110328
    Abstract: A mobile station including: a communication unit that includes a first logical processing subject and a second logical processing subject that operates in association with the first logical processing subject and performs multiple communications with a first wireless communication apparatus and a second wireless communication apparatus; an accumulation unit that accumulates data received from the second wireless communication apparatus; and a notifying unit that notifies the first wireless communication apparatus of data receiving status in the accumulation unit.
    Type: Application
    Filed: December 5, 2018
    Publication date: April 11, 2019
    Applicant: FUJITSU CONNECTED TECHNOLOGIES LIMITED
    Inventors: Yoshiaki OHTA, SHINICHIRO AIKAWA
  • Patent number: 10257726
    Abstract: A wireless terminal, includes a first transceiver configured to transmit a first type of wireless signal; and a second transceiver configured to transmit a second type of wireless signal; wherein the first transceiver is configured to transmit an indication of interference when interference is detected between the first type of wireless signal and the second type of wireless signal and to transmit information showing a condition of each of the first and second types of wireless signal with the indication of interference; and the first transceiver is further configured to receive interference control information useable by the terminal in mitigating the detected interference.
    Type: Grant
    Filed: February 24, 2016
    Date of Patent: April 9, 2019
    Assignee: FUJITSU CONNECTED TECHNOLOGIES LIMITED
    Inventors: Yoshiaki Ohta, Yoshihiro Kawasaki
  • Patent number: 10251176
    Abstract: A radio communication apparatus to perform communication with another radio communication apparatus by using a plurality of frequency bands, the radio communication apparatus includes: a receiver configured to receive, when performing a random access procedure to the another radio communication apparatus, a control message by using a first frequency band as a message transmitted by the radio communication apparatus at a last of the random access procedure, the control message instructing communication using a second frequency band different from the first frequency band; and a controller configured to control communication according to reception of the control message, to perform data communication with the another radio communication apparatus by using the second frequency band.
    Type: Grant
    Filed: October 2, 2017
    Date of Patent: April 2, 2019
    Assignee: FUJITSU LIMITED
    Inventors: Yoshiaki Ohta, Yoshihiro Kawasaki, Tetsuya Yano, Yoshinori Tanaka
  • Publication number: 20190075577
    Abstract: A radio base station includes: a radio communicator configured to perform radio communication; and a first controller that includes a first scheduler configured to perform a first scheduling that is at least a first part of a scheduling for the radio communication; and a second controller that is coupled to the first controller via a network, wherein the second controller comprises a second scheduler configured to perform a second scheduling that is at least a second part of the scheduling for the radio communication.
    Type: Application
    Filed: November 8, 2018
    Publication date: March 7, 2019
    Applicant: FUJITSU LIMITED
    Inventors: Takayoshi ODE, Yoshihiro KAWASAKI, SHINICHIRO AIKAWA, Yoshiaki OHTA, Michiharu NAKAMURA
  • Publication number: 20190074933
    Abstract: A communication apparatus includes a radio processing unit configured to transmit or receive a radio signal; and a control unit configured to control application of retransmission control in accordance with information indicating whether or not to apply the retransmission control, the information being included in a radio signal received from another communication apparatus via the radio processing unit.
    Type: Application
    Filed: October 22, 2018
    Publication date: March 7, 2019
    Applicant: FUJITSU LIMITED
    Inventors: Yoshiaki Ohta, YOSHIHIRO KAWASAKI
  • Patent number: 10212749
    Abstract: A wireless communication system, a mobile station, a base station, and a wireless communication method that improve communication efficiency between wireless communication stations are provided. A wireless communication apparatus includes a communication unit, which includes a first logical processing subject and a second logical processing subject that operates in association with the first logical processing subject and which performs multiple communications with a wireless communication apparatus, and includes a notifying unit that notifies the wireless communication apparatus of data related information. The wireless communication apparatus includes a second communication unit that transmits data, and a notifying unit that receives the data related information from the controller and controls an amount of data transmitted by the second communication unit.
    Type: Grant
    Filed: November 5, 2015
    Date of Patent: February 19, 2019
    Assignee: FUJITSU CONNECTED TECHNOLOGIES LIMITED
    Inventors: Yoshiaki Ohta, Shinichiro Aikawa
  • Patent number: 10206243
    Abstract: A wireless communications system includes: a base station; and a wireless station, wherein the base station transmits to the wireless station, after receiving a first signal of Radio Resource Control (RRC) protocol from the wireless station, a second signal of RRC protocol including information related to a timing of transition to a first state of RRC protocol, and the wireless station transitions to the first state according to the information related to the timing and included in the second signal, and upon transition from the first state to a second state other than the first state, stores a parameter related to wireless communication and used in the first state.
    Type: Grant
    Filed: February 22, 2018
    Date of Patent: February 12, 2019
    Assignee: FUJITSU CONNECTED TECHNOLOGIES LIMITED
    Inventor: Yoshiaki Ohta
  • Patent number: 10182422
    Abstract: A wireless communications system includes a base station and a mobile station. The base station transmits a second control signal used for configuring a first interval during which a first control signal having a plurality of formats is monitored and a second interval that is different from the first interval. The mobile station monitors the first control signal for the plurality of the formats during the first interval, and monitors the first control signal for formats fewer than the plurality of the formats during the second interval.
    Type: Grant
    Filed: May 1, 2017
    Date of Patent: January 15, 2019
    Assignee: FUJITSU CONNECTED TECHNOLOGIES LIMITED
    Inventor: Yoshiaki Ohta
  • Publication number: 20180359679
    Abstract: A communication device includes a receiver , a transmitter that executes first transmission processing and second transmission processing , and a controller that controls the transmitter in accordance with a radio quality of wireless communication so that either the first transmission processing or the second transmission processing is executed.
    Type: Application
    Filed: August 21, 2018
    Publication date: December 13, 2018
    Applicant: FUJITSU LIMITED
    Inventors: Yoshiaki Ohta, YOSHIHIRO KAWASAKI, Takayoshi Ode, Michiharu Nakamura
  • Publication number: 20180359191
    Abstract: A communication device includes, a controller that executes control to receive a data transmission packet from another communication device, create a reception confirmation packet indicating reception of the data transmission packet, and store the created reception confirmation packet in a transmission buffer, and a transmitter that transmits a part of reception confirmation packets stored in the transmission buffer to the other communication device but does not transmit reception confirmation packets other than the transmitted reception confirmation packet to the other communication device.
    Type: Application
    Filed: August 21, 2018
    Publication date: December 13, 2018
    Applicant: FUJITSU LIMITED
    Inventors: Yoshiaki Ohta, YOSHIHIRO KAWASAKI, Takayoshi Ode, Michiharu Nakamura
  • Publication number: 20180332588
    Abstract: A wireless communication system includes: a transmitting apparatus to transmit using one or more of radio resources; and a receiving apparatus to store correspondence information indicating a correspondence between a resource amount and a data size, the transmitting apparatus transmits to the receiving apparatus, data mapped to the radio resources, where the transmitting apparatus transmits a single control signal associated with the data to be transmitted across a plurality of time resource, the transmitting apparatus transmits a single control signal associated with the data transmitted across a plurality of frequency resources, the single control signal includes information indicating a value based on a number of the plurality of time resources, a number of the plurality of frequency resources, or information indicating a first resource amount wherein the receiving apparatus acquires a first data size being dependent on the value, the first resource amount, and correspondence information, and decode the da
    Type: Application
    Filed: July 23, 2018
    Publication date: November 15, 2018
    Applicant: FUJITSU LIMITED
    Inventors: Tetsuya YANO, Yoshiaki OHTA, Yoshinori TANAKA
  • Publication number: 20180324884
    Abstract: A processing method includes: determining at least one of first conditions in a first situation, by a second wireless apparatus in a system which includes a first wireless apparatus and a plurality of the second wireless apparatuses, the first situation being when the wireless apparatus operates in an idle mode and when communication between the wireless apparatus and the one other second wireless apparatus is performed via a first channel, the first conditions including whether a quality of the first channel is lower than a predetermined quality and whether a switching instruction is received; and executing a first process by the second wireless apparatus when the at least one of first conditions is met, the first process including establishing a second channel between the second wireless apparatus and the first wireless apparatus, and switching from communication via the first channel to communication via the second channel.
    Type: Application
    Filed: July 2, 2018
    Publication date: November 8, 2018
    Applicant: FUJITSU LIMITED
    Inventors: Yoshiaki Ohta, SHINICHIRO AIKAWA, Takayoshi Ode
  • Publication number: 20180324790
    Abstract: A radio communication device includes: a communication circuit configured to transmit and receive a signal to and from other radio communication device; and a control circuit configured to cause the communication circuit to transmit, through a control channel in a first layer, first acknowledgement information to the other radio communication device, the first acknowledgement information indicating whether data in a second layer different from the first layer is normally received from the other radio communication device.
    Type: Application
    Filed: June 28, 2018
    Publication date: November 8, 2018
    Applicant: FUJITSU LIMITED
    Inventors: Yoshiaki Ohta, YOSHIHIRO KAWASAKI, YOSHINORI TANAKA, SHINICHIRO AIKAWA
  • Publication number: 20180316480
    Abstract: A radio communication device includes: a communication circuit configured to transmit and receive a signal to and from first radio communication device; and a control circuit configured to cause the communication circuit to receive a first signal in a first layer, the first signal being configured to include data in a second layer different from the first layer, and cause the communication circuit to transmit, through a first radio resource on a shared channel, acknowledgement information when the first signal from the first radio communication device is received, the first radio resource being selected from among the shared channel without scheduling information from the first communication device, the acknowledge information indicating whether the data in the second layer is normally received from the first radio communication device.
    Type: Application
    Filed: July 3, 2018
    Publication date: November 1, 2018
    Applicant: FUJITSU LIMITED
    Inventors: Yoshiaki Ohta, YOSHIHIRO KAWASAKI, YOSHINORI TANAKA, SHINICHIRO AIKAWA
  • Publication number: 20180310271
    Abstract: A wireless communications system including a base station and a terminal, the wireless communications system capable of communications between terminals through a first path and communications between terminals through a second path which different the first path , the wireless communications system includes: a plurality of terminals; and the base station including to: a memory; and a processor coupled to the memory, the processor configured to process related to proximity-based communications between a plurality of terminals; obtain identifiers of the terminal and information enables determination of whether to use the second path.
    Type: Application
    Filed: June 27, 2018
    Publication date: October 25, 2018
    Applicant: FUJITSU LIMITED
    Inventors: Yoshiaki OHTA, SHINICHIRO AIKAWA, Takayoshi ODE
  • Publication number: 20180310217
    Abstract: A wireless apparatus, which is used as a first wireless apparatus in a wireless system that includes the first wireless apparatus and a plurality of second wireless apparatuses, includes: a communication circuit for receiving a result of measurement of a first channel from each of the plurality of second wireless apparatuses that communicate with each other via the first channel; and a control circuit for executing a first process when the result of the measurement is lower than a predetermined quality, wherein the first process causes the communication circuit to transmit a switching instruction to each of the plurality of second wireless apparatuses, to establish a second channel between the wireless apparatus and each of the plurality of second wireless apparatuses, and to switch wireless communication between each of the plurality of second wireless apparatuses via the first channel to wireless communication via the second channel.
    Type: Application
    Filed: July 2, 2018
    Publication date: October 25, 2018
    Applicant: FUJITSU LIMITED
    Inventors: Yoshiaki Ohta, SHINICHIRO AIKAWA, Takayoshi Ode
  • Publication number: 20180310295
    Abstract: A wireless communication apparatus, for performing wireless communication with a first wireless communication apparatus based on a discovery signal, includes: a control circuit configured to control a probability of using a radio resource for the discovery signal; and a communication circuit configured to transmit the discovery signal to the first wireless communication apparatus through the radio resource in accordance with the probability.
    Type: Application
    Filed: July 2, 2018
    Publication date: October 25, 2018
    Applicant: FUJITSU LIMITED
    Inventors: Yoshiaki Ohta, SHINICHIRO AIKAWA, Takayoshi Ode
  • Patent number: 10098147
    Abstract: Provided is a wireless communication system in which high-speed communication is implemented. A receiving device includes an RA managing unit that transmits Msg1 through a PRACH over an SCELL and a D-SR managing unit that transmits a D-SR through a PUCCH over a PCELL before or after the PRACH. A transmitting device includes an RA managing unit that receives Msg1 and a D-SR managing unit that receives the D-SR. The RA managing unit associates a scheduling request with a preamble, and identifies a receiving device.
    Type: Grant
    Filed: June 7, 2013
    Date of Patent: October 9, 2018
    Assignee: FUJITSU LIMITED
    Inventors: Yoshiaki Ohta, Yoshinori Tanaka, Yoshiharu Tajima, Yoshihiro Kawasaki
  • Patent number: 10075913
    Abstract: A wireless communication system includes a mobile station and a base station. The base station includes a blind decoding control unit that transmits a signal including a control signal serving as a trigger to change a decoding process to the mobile station based on a result of measurement of the amount of data of the mobile station. The mobile station includes a blind decoding control unit that selects a signal format to be decoded upon reception of the control signal from the base station, and detects a control signal directed to the mobile station by decoding the signal having the selected format among signals received from the base station.
    Type: Grant
    Filed: March 26, 2014
    Date of Patent: September 11, 2018
    Assignee: FUJITSU LIMITED
    Inventors: Yoshiaki Ohta, Yoshihiro Kawasaki, Yoshiharu Tajima
  • Patent number: 10064182
    Abstract: A radio communication method including: storing each of a plurality of associations between each resource size and each data size by a terminal, each data size indicating each size of data capable of being transmitted using an associated resource size, receiving specified data, first control information, and second control information from a base station by the terminal, the specified data being mapped across a plurality of radio resources, each of the plurality of radio resources having each specified frequency bandwidth and each specified time period, the first control information indicating the number of the plurality of radio resources, the second control information indicating an individual resource size allocated for the specified data in each of the plurality of radio resources, obtaining a total data size of the specified data by the terminal based on the first control information, the second control information, and the plurality of associations.
    Type: Grant
    Filed: September 14, 2015
    Date of Patent: August 28, 2018
    Assignee: FUJITSU LIMITED
    Inventors: Tetsuya Yano, Yoshiaki Ohta, Yoshinori Tanaka