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).

  • Patent number: 11728938
    Abstract: In a terminal, based on a first parameter included in each of a plurality of downlink control signals, the first parameter indicating a cumulative count of code block groups (CBGs) configuring each of a plurality of transport blocks (TBs) assigned by the plurality of downlink control signals, a HARQ-ACK generation unit generates a response signal (HARQ-ACK) for each of the code block groups. A transmission unit collectively transmits the response signals for each of the code block groups.
    Type: Grant
    Filed: May 7, 2018
    Date of Patent: August 15, 2023
    Assignee: Panasonic Intellectual Property Corporation of America
    Inventors: Tomoya Nunome, Ayako Horiuchi, Takashi Iwai, Hidetoshi Suzuki
  • Publication number: 20230247562
    Abstract: The objective of the present invention is to suppress interference on an access point as a result of terminal-to-terminal communication. This terminal is provided with: a control circuit which performs transmission power control of a second link with another terminal, on the basis of a parameter relating to the state of a first link with an access point; and a transmitting circuit which transmits signals in accordance with the transmission power control.
    Type: Application
    Filed: June 3, 2021
    Publication date: August 3, 2023
    Inventors: Tomofumi TAKATA, Takashi IWAI, Yoshio URABE, Lei HUANG, Rojan CHITRAKAR
  • Patent number: 11711791
    Abstract: It is an object to provide a sequence allocating method that, while maintaining the number of Zadoff-Chu sequences to compose a sequence group, is configured to make it possible to reduce correlations between different sequential groups. This method comprises the steps of setting a standard sequence with a standard sequence length and a standard sequence number in a step, setting a threshold value in accordance with an RB number in a step, setting a sequence length corresponding to RB number in a step, judging whether ¦r/N?rb/Nb¦=Xth(m) is satisfied in a step, including a plurality of Zadoff-Chu sequences with a sequence number and a sequence length in a sequence group in a step if the judgment is positive, and allocating the sequence group to the same cell in a step.
    Type: Grant
    Filed: January 7, 2022
    Date of Patent: July 25, 2023
    Assignee: PANASONIC INTELLECTUAL PROPERTY CORPORATION OF AMERICA
    Inventors: Takashi Iwai, Daichi Imamura, Tomofumi Takata, Yoshihiko Ogawa
  • Patent number: 11711251
    Abstract: In the multiple short sequence based SRS, multiple items of sequence data having a short sequence length corresponding to a partial band are used for transmitting SRS in discontinuous bands. In the multiple short sequence based SRS, a terminal specifies a frequency domain to be used for transmitting a reference signal using predetermined sequence data, applies a phase shift index associated with the specified frequency domain to the reference signal, and transmits the reference signal to which the phase shift index is applied by using the specified frequency domain.
    Type: Grant
    Filed: October 4, 2022
    Date of Patent: July 25, 2023
    Assignee: PANASONIC INTELLECTUAL PROPERTY CORPORATION OF AMERICA
    Inventors: Takashi Iwai, Tomohumi Takata, Hidetoshi Suzuki, Ayako Horiuchi
  • Patent number: 11700098
    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: June 16, 2022
    Date of Patent: July 11, 2023
    Assignee: Sun Patent Trust
    Inventors: Takashi Iwai, Sadaki Futagi, Tomohumi Takata, Daichi Imamura, Yoshihiko Ogawa
  • Patent number: 11696324
    Abstract: In an AP, a Trigger frame generator generates a trigger signal instructing an uplink signal transmission, the trigger signal including a terminal information field that includes a terminal ID subfield and a resource unit allocation information subfield, and a radio transmitter/receiver transmits the trigger signal. In a case where the trigger signal includes a first terminal information field specifying one or more contiguous resource units for random access, the Trigger frame generator sets an unused ID that is not to be used as a terminal ID in the first terminal information field.
    Type: Grant
    Filed: June 21, 2021
    Date of Patent: July 4, 2023
    Assignee: PANASONIC INTELLECTUAL PROPERTY CORPORATION OF AMERICA
    Inventors: Takashi Iwai, Yoshio Urabe, Tomohumi Takata
  • Patent number: 11695510
    Abstract: A self-contained operation using a time-unit configuration taking into consideration HARQ processes is performed. In base station, transmission section transmits a downlink signal in a downlink transmission region in a time unit composed of the downlink transmission region, an uplink transmission region, and a gap interval that is a switching point from the downlink transmission region to the uplink transmission region; and reception section receives an uplink signal in the uplink transmission region in the time unit. Each time unit includes the downlink transmission region and the uplink transmission region for each of HARQ processes.
    Type: Grant
    Filed: September 24, 2020
    Date of Patent: July 4, 2023
    Assignee: Panasonic Intellectual Property Corporation of America
    Inventors: Takashi Iwai, Hidetoshi Suzuki, Ayako Horiuchi, Lilei Wang, Joachim Loehr
  • Patent number: 11695607
    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: Grant
    Filed: January 18, 2022
    Date of Patent: July 4, 2023
    Assignee: Panasonic Intellectual Property Corporation of America
    Inventors: Takashi Iwai, Tomohumi Takata, Hidetoshi Suzuki, Tetsuya Yamamoto, Quan Kuang
  • Publication number: 20230209362
    Abstract: Provided is a radio communication device capable of reducing interference, caused by non-SR transmission, with a basic service set (BSS) performing spatial reuse (SR) transmission. An SR transmission resource control unit (107) of the radio communication device (SR initiator) (100) determines transmission resources for an SR signal to be transmitted by means of SR to a second BSS other than a first BSS to which the radio communication device (100) belongs on the basis of radio quality information transmitted from other radio communication devices (SR responders) in the first BSS. A radio transmission/reception unit (101) transmits the SR signal by using the determined transmission resources.
    Type: Application
    Filed: February 10, 2023
    Publication date: June 29, 2023
    Inventors: Jun MINOTANI, Atsushi MATSUMOTO, Takashi IWAI, Tomofumi TAKATA, Yoshio URABE
  • Publication number: 20230208481
    Abstract: This invention is a transmission device capable of enhancing the reception characteristics of a terminal when employing transmit diversity using two antenna ports in an ePDCCH. In a base station (100) that transmits a reference signal to a terminal (200) using two antenna ports, a setting unit (102), on the basis of the reception quality of the terminal, sets as the aforementioned two antenna ports either a first antenna port pair for which DMRS (reference signals) do not undergo mutual code multiplexing, or a second antenna port pair for which the DMRS do undergo code multiplexing. A transmitter (109) transmits the DMRS from the two antenna ports set in the setting unit (102).
    Type: Application
    Filed: February 28, 2023
    Publication date: June 29, 2023
    Inventors: Tadashi YOSHIDA, Ayako HORIUCHI, Takashi IWAI, Yoshihiko OGAWA, Akihiko NISHIO
  • Publication number: 20230199664
    Abstract: This access point is provided with a control circuit which, on the basis of transmission power control-related information received from another access point, generates a parameter relating to uplink transmission power control, and a transmission circuit which transmits a control signal that includes said parameter.
    Type: Application
    Filed: March 16, 2021
    Publication date: June 22, 2023
    Inventors: Tomofumi TAKATA, Yoshio URABE, Takashi IWAI, Lei HUANG
  • Patent number: 11683765
    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: May 5, 2022
    Date of Patent: June 20, 2023
    Assignee: Sun Patent Trust
    Inventors: Shinsuke Takaoka, Hidetoshi Suzuki, Akihiko Nishio, Takashi Iwai
  • Patent number: 11659601
    Abstract: The present invention provides a terminal capable of suitably performing random access processing. In a terminal (100), a RACH resource determination unit (104) determines the format of a random access signal on the basis of a parameter related to the transmission of the random access signal, which includes a preamble part and a data part. A wireless transmission unit (109) transmits the random access signal on the basis of the format.
    Type: Grant
    Filed: October 2, 2019
    Date of Patent: May 23, 2023
    Assignee: Panasonic Intellectual Property Corporation of America
    Inventors: Takashi Iwai, Hidetoshi Suzuki, Tomofumi Takata
  • Patent number: 11659567
    Abstract: A terminal includes a receiver, which, in operation, receives time unit information related to an amount of an uplink time resource per a time unit, and receives a number of repetitions over a plurality of the time units, wherein the time unit includes a downlink time resource for a downlink signal and the uplink time resource for a response signal. The amount of the uplink time resource is expressed as a fixed number of consecutive symbols that remains the same number over the plurality of the time units over which the response signal is repeatedly transmitted. The terminal includes a transmitter, which, in operation, repeatedly transmits the response signal over the plurality of the time units.
    Type: Grant
    Filed: March 12, 2021
    Date of Patent: May 23, 2023
    Assignee: Panasonic Intellectual Property Corporation of America
    Inventors: Tetsuya Yamamoto, Ayako Horiuchi, Takashi Iwai
  • Publication number: 20230156678
    Abstract: This terminal comprises: a receiving circuit which receives first information on a plurality of resource units in a resource assignment candidate; and a control circuit which controls communication using the resource units on the basis of the first information.
    Type: Application
    Filed: January 19, 2021
    Publication date: May 18, 2023
    Inventors: Takayuki NAKANO, Takashi IWAI, Yoshio URABE
  • Patent number: 11649370
    Abstract: A thermosetting coating composition includes a hydroxyl group-containing resin (A), a blocked polyisocyanate curing agent (B), and an amine compound (C) represented by the formula (1). In the formula (1), R1 to R5 each independently represents a hydrogen atom or an organic group having one or more carbon atoms. The organic group may contain one or more atoms selected from the group consisting of oxygen atoms, nitrogen atoms, sulfur atoms, and halogen atoms.
    Type: Grant
    Filed: September 27, 2017
    Date of Patent: May 16, 2023
    Assignee: KANSAI PAINT CO., LTD.
    Inventors: Haruyuki Gontani, Fumio Yamashita, Takashi Iwai
  • Publication number: 20230139852
    Abstract: The present invention provides a transmission device and transmission method that are capable of improving reception quality during cooperative communication. A first transmission device according to the present invention comprises: a control circuit which, if the first transmission device and a second transmission device are carrying out transmission in cooperation, generates first control information that includes information common to at least a portion of second control information transmitted by the second transmission device in a second preamble; and a transmission circuit which transmits the first control information in a first preamble.
    Type: Application
    Filed: February 25, 2021
    Publication date: May 4, 2023
    Inventors: Hiroyuki KANAYA, Takashi IWAI, Yoshio URABE, Tomofumi TAKATA, Takayuki NAKANO, Jun MINOTANI, Lei HUANG
  • Publication number: 20230134156
    Abstract: An epoxy resin, which is obtained by reacting at least a compound having one or more epoxy groups and a compound having a functional group that reacts with the epoxy groups, satisfies conditions (I) and/or (II): (I) the compound having a functional group that reacts with the epoxy groups includes a trihydric or higher phenol compound and/or a compound including a trifunctional or higher polyisocyanate; (II) the epoxy resin has an average degree of polyfunctionalization (X1) per molecule, as expressed by Formula (1), of 0.30 or more: Average degree of polyfunctionalization (X1)=number of ends per molecule of epoxy resin?2.
    Type: Application
    Filed: March 23, 2021
    Publication date: May 4, 2023
    Inventors: Shinji TSUSHIMA, Noriyuki YAMADA, Takashi IWAI
  • Patent number: 11641628
    Abstract: In a terminal, a selecting unit selects one generation method from a plurality of generation methods for reference signals (sounding reference signals (SRSs)). A radio transmitting unit transmits reference signals (SRSs) generated in accordance with the selected generation method.
    Type: Grant
    Filed: April 17, 2018
    Date of Patent: May 2, 2023
    Assignee: Panasonic Intellectual Property Corporation of America
    Inventors: Takashi Iwai, Hidetoshi Suzuki, Tomohumi Takata, Tetsuya Yamamoto
  • Publication number: 20230129544
    Abstract: A communication apparatus in the present disclosure comprises an AID generator, a Trigger frame generator, and a wireless transmitter/receiver. When a Trigger Type in a trigger frame is an RA trigger, the AID generator (103) generates, as information for an AID12 subfield, information that is different from an AID. The Trigger frame generator (104) generates a RA variant Trigger frame when the Trigger Type in the trigger frame is an RA trigger, and sets, in the AID12 subfield included in the RA variant Trigger frame, the information output from the AID generator (103). The wireless transmitter/receiver (106) transmits the Trigger frame, generated by the Trigger frame generator (104), to a terminal (200).
    Type: Application
    Filed: December 22, 2022
    Publication date: April 27, 2023
    Inventors: TAKASHI IWAI, TOMOHUMI TAKATA, ATSUSHI MATSUMOTO