Patents by Inventor Takashi Iwai

Takashi Iwai 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).

  • BASE STATION, TRANSMISSION METHOD, AND RECEPTION METHOD
    Publication number: 20220272715
    Abstract: The present invention enables more efficient control of Multi-AP coordination. A base station, according to the present invention, comprises: a control circuit that generates shared information that is shared among a plurality of users and includes information pertaining to unassigned resources, and individual user information specific to each of the plurality of users; and a transmission circuit that transmits a control signal comprising the shared information and the individual user information.
    Type: Application
    Filed: July 10, 2020
    Publication date: August 25, 2022
    Inventors: Takashi IWAI, Tomofumi TAKATA, Yoshio URABE, Takayuki NAKANO, Jun MINOTANI
  • MOBILE STATION AND POWER ALLOCATION METHOD
    Publication number: 20220264485
    Abstract: Provided are a wireless communication terminal device and a power allocation method, wherein transmission channel quality information, regarding a Pcell having a high probability that UCI is multiplied therein, can be accurately estimated by an SRS having high priority in power allocation, and an eNB can instruct appropriate transmission power to an UL channel which transmits the subsequent UCI. A power scaling detection unit detects whether or not a total transmission power value of the UL channels transmitted by the plurality of CC exceeds the maximum transmission power specific to the UE. When a plurality of SRS are simultaneously transmitted using a Pcell and a Scell, and power scaling occurs, a power scaling control unit performs power allocation so that transmission power of the SRS of the Pcell has the higher priority than that of the SRS of the Scell.
    Type: Application
    Filed: May 5, 2022
    Publication date: August 18, 2022
    Inventors: Shinsuke Takaoka, Hidetoshi Suzuki, Akihiko Nishio, Takashi Iwai
  • COMMUNICATION APPARATUS AND REFERENCE SIGNAL RECEIVING METHOD
    Publication number: 20220255655
    Abstract: Provided are a wireless communication apparatus and a reference signal generating method, wherein inter-cell interference is reduced inside and outside a CoMP set. A CoMP mode setting unit (101) sets whether the terminal (100) thereof is a CoMP terminal or a Non-CoMP terminal. When the terminal (100) is set as a Non-CoMP terminal, the hopping pattern calculating unit (104) calculates a ZC sequence number to be used as the transmission timing, from among all the ZC sequence numbers that can be used within the system. When the terminal (100) is set as a CoMP terminal, the hopping pattern calculating unit (104) calculates a ZC sequence number to be used as the transmission timing, by hopping the ZC sequence numbers to be used within the CoMP set. A ZC sequence generating unit (105) generates a ZC sequence to be used as an SRS, using the calculated ZC sequence number.
    Type: Application
    Filed: April 26, 2022
    Publication date: August 11, 2022
    Inventors: Takashi Iwai, Daichi Imamura, Akihiko Nishio, Yoshihiko Ogawa, Masaru Fukuoka
  • WIRELESS COMMUNICATION DEVICE AND METHOD FOR CONTROLLING TRANSMISSION POWER
    Publication number: 20220256476
    Abstract: Disclosed is a wireless communication device that can suppress an increase in power consumption of a terminal while preventing the degradation of SINR measurement precision resulting from TPC errors in a base station. A terminal controls the transmission power of a second signal by adding an offset to the transmission power of a first signal; an offset-setting unit sets an offset correction value in response to a transmission time gap between a third signal transmitted the previous time and the second signal transmitted this time; and a transmission power control unit controls the transmission power of the second signal using the correction value.
    Type: Application
    Filed: April 27, 2022
    Publication date: August 11, 2022
    Inventors: Takashi Iwai, Daichi Imamura, Akihiko Nishio, Yoshihiko Ogawa, Shinsuke Takaoka
  • INTEGRATED CIRCUIT FOR CONTROLLING RADIO COMMUNICATION
    Publication number: 20220255709
    Abstract: Provided is a radio communication device which can prevent interference between SRS and PUCCH when the PUCCH transmission bandwidth fluctuates and suppress degradation of CQI estimation accuracy by the band where no SRS is transmitted. The device includes: an SRS code generation unit (201) which generates an SRS (Sounding Reference Signal) for measuring uplink line data channel quality; an SRS arrangement unit (202) which frequency-multiplexes the SRS on the SR transmission band and arranges it; and an SRS arrangement control unit (208) which controls SRS frequency multiplex so as to be uniform in frequency without modifying the bandwidth of one SRS multiplex unit in accordance with the fluctuation of the reference signal transmission bandwidth according to the SRS arrangement information transmitted from the base station and furthermore controls the transmission interval of the frequency-multiplexed SRS.
    Type: Application
    Filed: April 25, 2022
    Publication date: August 11, 2022
    Inventors: Atsushi MATSUMOTO, Daichi IMAMURA, Takashi IWAI, Yoshihiko OGAWA, Tomofumi TAKATA, Katsuhiko HIRAMATSU
  • Wireless station and communication method for determining transmission to another wireless station in a cell in view of an interference cell
    Patent number: 11405957
    Abstract: A wireless station that belongs to a communication cell includes a receiver which, in operation, receives a trigger frame transmitted from an access point that belongs to an interference cell and a controller which, in operation, determines, based on at least one parameter included in the trigger frame and reception power value of the trigger frame received at the wireless station, whether the wireless station is allowed to transmit to other wireless station that belongs to the communication cell, wherein the at least one parameter includes a value set based on transmit power value of the trigger frame transmitted from the access point.
    Type: Grant
    Filed: November 7, 2018
    Date of Patent: August 2, 2022
    Assignee: Panasonic Intellectual Property Corporation of America
    Inventors: Tomoya Nunome, Takashi Iwai, Yoshio Urabe
  • INTEGRATED CIRCUIT FOR RECEIVING DOWNLINK CONTROL INFORMATION AND TRANSMITTING UPLINK DATA
    Publication number: 20220240298
    Abstract: Communication apparatuses and methods reduce the amount of signaling while maintaining a high scheduling gain. A determination unit stores a correspondence between the number of code words and the number of clusters to reduce the maximum value for the number of clusters allocated to each terminal as the number of code words increases, and thus determines the maximum value for the number of clusters based on the number of code words acquired. Based on the number of code words for a transmission signal from a terminal, an estimated value for the reception quality that is output by an estimation unit, and the maximum value for the number of clusters that is output by the determination unit, a scheduling unit schedules the allocation of the transmission signal transmitted by each terminal to a transmission band frequency (frequency resource) so as not to exceed the maximum value for the number of clusters.
    Type: Application
    Filed: April 11, 2022
    Publication date: July 28, 2022
    Inventors: Yoshihiko OGAWA, Akihiko NISHIO, Daichi IMAMURA, Seigo NAKAO, Masayuki HOSHINO, Takashi IWAI, Sadaki FUTAGI
  • BASE STATION, TERMINAL, AND COMMUNICATION METHOD
    Publication number: 20220240269
    Abstract: This base station is provided with: a control circuit that generates information relating to a terminal group among a plurality of terminals, said terminal group being a target of transmission by non-orthogonal multiple access; and a transmission circuit that transmits the information relating to the terminal group during a period in which control information addressed to the plurality of terminals is transmitted.
    Type: Application
    Filed: May 1, 2020
    Publication date: July 28, 2022
    Inventors: Jun MINOTANI, Takashi IWAI, Tomofumi TAKATA, Yoshio URABE
  • METHOD AND SYSTEM FOR MULTI-OBJECT SPACE DEBRIS REMOVAL
    Publication number: 20220227504
    Abstract: A method for rendezvous with an orbiting object comprising: launching a tug and a servicer into a client orbit; separating the servicer from the tug; and docking the servicer with a client. A system for rendezvous with an orbiting object comprising: a first spacecraft comprising a tug capable of towing a second spacecraft, wherein the second spacecraft is a servicer configured to dock with a tumbling client orbiting object.
    Type: Application
    Filed: January 13, 2022
    Publication date: July 21, 2022
    Applicant: Astroscale Holdings Inc.
    Inventors: Michael Lindsay, Takashi Iwai
  • Communication apparatus and reference signal reception method
    Patent number: 11394507
    Abstract: Disclosed are a wireless transmitter and a reference signal transmission method that improve channel estimation accuracy. In a terminal, which transmits a reference signal using n (n is a non-negative integer 2 or greater) band blocks (which correspond to clusters here), which are disposed with spaces therebetween in a frequency direction, a reference signal controller switches the reference signal formation method of a reference signal generator between a first formation method and a second formation method based on the number (n) of band blocks. In addition, a threshold value setting unit adjusts a switching threshold value based on the frequency spacing between band blocks. Thus, the reference signal formation method can be selected with good accuracy and, as a result, channel estimation accuracy is further improved.
    Type: Grant
    Filed: December 22, 2020
    Date of Patent: July 19, 2022
    Assignee: Sun Patent Trust
    Inventors: Takashi Iwai, Sadaki Futagi, Tomohumi Takata, Daichi Imamura, Yoshihiko Ogawa
  • Integrated circuit
    Patent number: 11395295
    Abstract: Disclosed are a wireless communication base station device and a division number determination method that improves the frequency diversity effect while maintaining channel estimation accuracy regardless of the number of divisions in the frequency domain of a transmission signal from a wireless communication terminal device. A determination unit determines the number of divisions in the frequency domain of a transmission signal from a wireless communication terminal device. Here, the determination unit increases the number of divisions in the frequency domain of the transmission signal from the wireless communication terminal device as the number of pilot blocks included in the transmission signal increases. In addition, a scheduling unit schedules allocation to the frequency resources of the divided transmission signal according to the number of divisions determined by the determination unit.
    Type: Grant
    Filed: April 20, 2020
    Date of Patent: July 19, 2022
    Assignee: Sun Patent Trust
    Inventors: Yoshihiko Ogawa, Seigo Nakao, Daichi Imamura, Akihiko Nishio, Masayuki Hoshino, Katsuhiko Hiramatsu, Kenichi Miyoshi, Yasuaki Yuda, Sadaki Futagi, Takashi Iwai
  • TERMINAL, BASE STATION, TRANSMITTING METHOD, AND RECEIVING METHOD
    Publication number: 20220191902
    Abstract: Provided is a terminal capable of improving utilization efficiency of an uplink resource in an unlicensed band. In a terminal (200), a transmission control unit (206) sets, in accordance with at least one of a data size and retransmission of uplink data, a first end position of a time resource which is set for the uplink data to a second end position. A transmission unit (210) transmits the uplink data on the basis of the second end position.
    Type: Application
    Filed: January 22, 2020
    Publication date: June 16, 2022
    Inventors: Tomoya NUNOME, Hidetoshi SUZUKI, Takashi IWAI, Ayako HORIUCHI
  • BASE STATION, TERMINAL AND COMMUNICATION METHOD
    Publication number: 20220182176
    Abstract: A base station is provided with: a control circuit that, on the basis of one of a communication parameter which is set in accordance with communication quality and a retransmission control operation, decides the other thereof; and a communication circuit that, on the basis of the communication parameter or retransmission control operation to be decided, communicates with a terminal.
    Type: Application
    Filed: January 22, 2020
    Publication date: June 9, 2022
    Inventors: Takayuki NAKANO, Yoshio URABE, Takashi IWAI, Tomofumi TAKATA
  • Wireless communication device and method for controlling transmission power
    Patent number: 11356958
    Abstract: Disclosed is a wireless communication device that can suppress an increase in power consumption of a terminal while preventing the degradation of SINR measurement precision resulting from TPC errors in a base station. A terminal controls the transmission power of a second signal by adding an offset to the transmission power of a first signal; an offset-setting unit sets an offset correction value in response to a transmission time gap between a third signal transmitted the previous time and the second signal transmitted this time; and a transmission power control unit controls the transmission power of the second signal using the correction value.
    Type: Grant
    Filed: November 17, 2020
    Date of Patent: June 7, 2022
    Assignee: Sun Patent Trust
    Inventors: Takashi Iwai, Daichi Imamura, Akihiko Nishio, Yoshihiko Ogawa, Shinsuke Takaoka
  • Mobile station and power allocation method
    Patent number: 11356960
    Abstract: Provided are a wireless communication terminal device and a power allocation method, wherein transmission channel quality information, regarding a Pcell having a high probability that UCI is multiplied therein, can be accurately estimated by an SRS having high priority in power allocation, and an eNB can instruct appropriate transmission power to an UL channel which transmits the subsequent UCI. A power scaling detection unit detects whether or not a total transmission power value of the UL channels transmitted by the plurality of CC exceeds the maximum transmission power specific to the UE. When a plurality of SRS are simultaneously transmitted using a Pcell and a Scell, and power scaling occurs, a power scaling control unit performs power allocation so that transmission power of the SRS of the Pcell has the higher priority than that of the SRS of the Scell.
    Type: Grant
    Filed: December 20, 2019
    Date of Patent: June 7, 2022
    Assignee: Sun Patent Trust
    Inventors: Shinsuke Takaoka, Hidetoshi Suzuki, Akihiko Nishio, Takashi Iwai
  • Communication apparatus and reference signal receiving method
    Patent number: 11349588
    Abstract: Provided are a wireless communication apparatus and a reference signal generating method, wherein inter-cell interference is reduced inside and outside a CoMP set. A CoMP mode setting unit (101) sets whether the terminal (100) thereof is a CoMP terminal or a Non-CoMP terminal. When the terminal (100) is set as a Non-CoMP terminal, the hopping pattern calculating unit (104) calculates a ZC sequence number to be used as the transmission timing, from among all the ZC sequence numbers that can be used within the system. When the terminal (100) is set as a CoMP terminal, the hopping pattern calculating unit (104) calculates a ZC sequence number to be used as the transmission timing, by hopping the ZC sequence numbers to be used within the CoMP set. A ZC sequence generating unit (105) generates a ZC sequence to be used as an SRS, using the calculated ZC sequence number.
    Type: Grant
    Filed: September 30, 2020
    Date of Patent: May 31, 2022
    Assignee: SUN PATENT TRUST
    Inventors: Takashi Iwai, Daichi Imamura, Akihiko Nishio, Yoshihiko Ogawa, Masaru Fukuoka
  • Integrated circuit for controlling radio communication
    Patent number: 11343051
    Abstract: Provided is a radio communication device which can prevent interference between SRS and PUCCH when the PUCCH transmission bandwidth fluctuates and suppress degradation of CQI estimation accuracy by the band where no SRS is transmitted. The device includes: an SRS code generation unit (201) which generates an SRS (Sounding Reference Signal) for measuring uplink line data channel quality; an SRS arrangement unit (202) which frequency-multiplexes the SRS on the SR transmission band and arranges it; and an SRS arrangement control unit (208) which controls SRS frequency multiplex so as to be uniform in frequency without modifying the bandwidth of one SRS multiplex unit in accordance with the fluctuation of the reference signal transmission bandwidth according to the SRS arrangement information transmitted from the base station and furthermore controls the transmission interval of the frequency-multiplexed SRS.
    Type: Grant
    Filed: September 28, 2020
    Date of Patent: May 24, 2022
    Assignee: Panasonic Holdings Corporation
    Inventors: Atsushi Matsumoto, Daichi Imamura, Takashi Iwai, Yoshihiko Ogawa, Tomofumi Takata, Katsuhiko Hiramatsu
  • BASE STATION, TERMINAL, TRANSMISSION METHOD AND RECEPTION METHOD
    Publication number: 20220158768
    Abstract: A downlink wireless transmission device comprising: a control circuit that generates common information that is common to a plurality of users and unique user information that is unique to each of the plurality of users and corresponds to information pertaining to retransmission control, said common and unique information including information pertaining to retransmission control for each of the plurality of users; and a transmission circuit that transmits control signals including the common information and the unique user information.
    Type: Application
    Filed: January 22, 2020
    Publication date: May 19, 2022
    Inventors: Jun MINOTANI, Takashi IWAI, Tomofumi TAKATA, Yoshio URABE
  • Integrated circuit for receiving downlink control information and transmitting uplink data
    Patent number: 11330618
    Abstract: Communication apparatuses and methods reduce the amount of signaling while maintaining a high scheduling gain. A determination unit stores a correspondence between the number of code words and the number of clusters to reduce the maximum value for the number of clusters allocated to each terminal as the number of code words increases, and thus determines the maximum value for the number of clusters based on the number of code words acquired. Based on the number of code words for a transmission signal from a terminal, an estimated value for the reception quality that is output by an estimation unit, and the maximum value for the number of clusters that is output by the determination unit, a scheduling unit schedules the allocation of the transmission signal transmitted by each terminal to a transmission band frequency (frequency resource) so as not to exceed the maximum value for the number of clusters.
    Type: Grant
    Filed: June 9, 2020
    Date of Patent: May 10, 2022
    Assignee: Sun Patent Trust
    Inventors: Yoshihiko Ogawa, Akihiko Nishio, Daichi Imamura, Seigo Nakao, Masayuki Hoshino, Takashi Iwai, Sadaki Futagi
  • WIRELESS TRANSMISSION DEVICE, WIRELESS RECEPTION DEVICE, TRANSMISSION METHOD, AND RECEPTION METHOD
    Publication number: 20220141066
    Abstract: When a plurality of the subcarrier spacing values are applied, a reference signal is generated by using a sequence having a sequence length corresponding to a first ratio of a first subcarrier spacing set for transmission data to the maximum settable subcarrier spacing. The sequence of the reference signal is mapped to a frequency resource at mapping intervals in accordance with a second ratio which is the reciprocal of the first ratio, and the transmission data and the reference signal are transmitted.
    Type: Application
    Filed: January 18, 2022
    Publication date: May 5, 2022
    Inventors: TAKASHI IWAI, TOMOHUMI TAKATA, HIDETOSHI SUZUKI, TETSUYA YAMAMOTO, QUAN KUANG