Patents by Inventor Kazuaki Takeda

Kazuaki Takeda 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: 20210051605
    Abstract: A user equipment in a radio communication system including the user equipment and a base station, including: an uplink transmission power information calculation unit configured to calculate uplink transmission power information of a serving cell using a parameter that may be changed dynamically; and a signal transmission unit configured to include, in control information in which the uplink transmission power information is set, identification information for identifying a parameter used for calculation of the uplink transmission power information, and to transmit the control information in which the identification information is included to the base station.
    Type: Application
    Filed: February 15, 2018
    Publication date: February 18, 2021
    Applicant: NTT DOCOMO, INC.
    Inventors: Tooru Uchino, Ryosuke Osawa, Kazuki Takeda, Kazuaki Takeda, Hideaki Takahashi
  • Patent number: 10917210
    Abstract: A user terminal receives a downstream link data signal, a demodulation reference signal for demodulating the downstream link data signal, and a downstream link signal including a downstream link control signal; calculates a channel estimation value using the demodulation reference signal; demodulates the downstream link data signal using the channel estimation value; and demodulates the downstream link control signal using the channel estimation value calculated from the demodulation reference signal mapped to a symbol before a symbol to which the downstream link control signal is mapped in a sub-frame.
    Type: Grant
    Filed: August 2, 2017
    Date of Patent: February 9, 2021
    Assignee: NTT DOCOMO, INC.
    Inventors: Keisuke Saito, Kazuaki Takeda, Kazuki Takeda, Satoshi Nagata
  • Publication number: 20210037571
    Abstract: To improve an avoidance rate of collision of data transmitted according to a listening result, a user terminal includes: a reception section that, when an idle state is detected by listening in a radio base station, receives a transmission request signal addressed to each of one or more user terminals from the radio base station; a transmission section that transmits a response signal for the transmission request signal; and a control section that controls reception of downlink data that is multiplexed and transmitted from the radio base station within a given duration after the listening in response to the response signal.
    Type: Application
    Filed: March 29, 2018
    Publication date: February 4, 2021
    Applicant: NTT DOCOMO, INC.
    Inventors: Daisuke Murayama, Hiroki Harada, Kazuaki Takeda, Satoshi Nagata
  • Patent number: 10912043
    Abstract: The present invention is designed to properly control the transmission of UL signals transmitted in response to DL transmission, in future radio communication systems. A receiving section that receives downlink control information and downlink data, and a control section that controls the transmission of an acknowledgment signal in response to the downlink data, are provided, and the control section controls the timing for transmitting the delivery acknowledgment signal based on timing information included in the downlink control information.
    Type: Grant
    Filed: September 21, 2017
    Date of Patent: February 2, 2021
    Assignee: NTT DOCOMO, INC.
    Inventors: Kazuki Takeda, Kazuaki Takeda, Satoshi Nagata, Lihui Wang, Qin Mu, Liu Liu
  • Publication number: 20210029552
    Abstract: A reception apparatus includes: a receiving section that receives a plurality of request signals that have been transmitted by respectively using a plurality of precoding based on a listening result of a first frequency range; a transmitting section that transmits a response signal that is based on received quality of the plurality of request signals; and a control section that controls reception of data transmitted in the first frequency range by using precoding determined based on the response signal among the plurality of precoding.
    Type: Application
    Filed: March 29, 2018
    Publication date: January 28, 2021
    Applicant: NTT DOCOMO, INC.
    Inventors: Daisuke Murayama, Hiroki Harada, Kazuaki Takeda, Satoshi Nagata
  • Patent number: 10894460
    Abstract: An occupant detection system may detect a state of an occupant in a vehicle compartment. The occupant detection system may photograph the vehicle compartment and generate an image. The occupant detection system may change an attitude in order to change a position of an imaging region within the vehicle compartment. The occupant detection system may estimate the attitude based on information included in the image and control an operation based on the estimated attitude. The sensor may be provided by an infrared temperature sensor. The image may be provided by a thermal image showing a temperature distribution of the vehicle compartment. The occupant detection system may store a correspondence relationship between a position of a specific temperature boundary included in the thermal image and the attitude. The occupant detection system may estimate the attitude based on the correspondence relationship.
    Type: Grant
    Filed: May 20, 2019
    Date of Patent: January 19, 2021
    Assignee: DENSO CORPORATION
    Inventors: Takuma Yamauchi, Eitaro Tanaka, Haruhiko Watanabe, Fuminobu Watanabe, Goro Ueda, Akira Oga, Hiroshi Takeda, Kazuya Taniguchi, Tatsumi Kumada, Kazuaki Takemoto, Takashi Sato
  • Patent number: 10892808
    Abstract: A method of acquiring Channel State Information (CSI) in a wireless communication system includes transmitting, from a Base Station (BS) to a User Equipment (UE), a resource setting including time-domain behavior of CSI-Reference Signals (RSs) transmission that designates aperiodic, periodic, or semi-persistent; and transmitting, from the BS to the UE, the CSI-RSs based on the designated aperiodic, periodic, or semi-persistent. The resource setting includes precoding information that indicates whether precoders applied to the CSI-RSs is the same or different. The resource setting includes periodicity and a timing offset value of the CSI-RS transmission when the periodic or the semi-persistent is designated. The resource setting includes frequency-domain information that designates a wideband or a partial band used for the CSI-RS transmission. The resource setting includes a transmission bandwidth of the CSI-RS transmission when the partial band is designated.
    Type: Grant
    Filed: January 5, 2018
    Date of Patent: January 12, 2021
    Assignee: NTT DOCOMO, INC.
    Inventors: Yuichi Kakishima, Chongning Na, Satoshi Nagata, Kazuaki Takeda
  • Publication number: 20210007140
    Abstract: A transmitting apparatus that transmits data in a first frequency band is provided with a transmitting section that transmits a transmission request signal of the data in the first frequency band, a receiving section that receives a response signal to the transmission request signal in a second frequency band, and a control section that controls transmission of the data based on the response signal.
    Type: Application
    Filed: February 16, 2018
    Publication date: January 7, 2021
    Applicant: NTT DOCOMO, INC.
    Inventors: Daisuke Murayama, Hiroki Harada, Kazuaki Takeda, Satoshi Nagata
  • Patent number: 10873979
    Abstract: The present invention is designed to reduce the latency due to collisions in UL transmission when contention-based UL data transmission is employed. A user terminal communicates using a second transmission time interval (TTI), having a shorter TTI duration than a first TTI, and this user terminal has a transmission section that transmits multiple UL data without a UL grant from a radio base station, and a control section that controls allocation of the multiple UL data individually, and the control section applies frequency hopping to allocate the multiple UL data to resources of different second TTIs.
    Type: Grant
    Filed: May 11, 2017
    Date of Patent: December 22, 2020
    Assignee: NTT DOCOMO, INC.
    Inventors: Kazuaki Takeda, Kazuki Takeda, Yousuke Sano, Satoshi Nagata
  • Patent number: 10856179
    Abstract: Provided is an uplink signal configuration for a wireless communication system capable of performing uplink transmission by a plurality of communication schemes. A user equipment capable of performing uplink transmission by a plurality of communication schemes, includes: a transmission/reception unit configured to transmit and receive a radio signal to and from a base station; and a signal processing unit configured to process the radio signal, wherein the signal processing unit generates an uplink control signal and an uplink data signal according to a first uplink signal configuration mapping the uplink control signal to an uplink control channel and mapping the uplink data signal to an uplink shared channel, and wherein the transmission/reception unit simultaneously transmits the uplink control signal and the uplink data signal generated according the first uplink signal configuration according to a selected communication scheme.
    Type: Grant
    Filed: August 23, 2017
    Date of Patent: December 1, 2020
    Assignee: NTT DOCOMO, INC.
    Inventors: Hideyuki Moroga, Kazuki Takeda, Kazuaki Takeda, Satoshi Nagata
  • Publication number: 20200374840
    Abstract: A user terminal is a user terminal of a first category that supports a channel bandwidth equal to or narrower than an indispensable channel bandwidth defined per subcarrier spacing for a user terminal of a second category, and includes: a reception section that receives at least one of a synchronization signal and a broadcast channel; and a control section that controls reception of system information that is mapped in a given bandwidth equal to or narrower than the indispensable channel bandwidth.
    Type: Application
    Filed: January 31, 2018
    Publication date: November 26, 2020
    Applicant: NTT DOCOMO, INC.
    Inventors: Kazuaki Takeda, Satoshi Nagata, Mikio Iwamura
  • Patent number: 10820317
    Abstract: In order to realize proper communication in the next-generation communication system, a user terminal that performs communication through a communication system in which a plurality of communication parameters is set, includes: a reception section that receives information on a partial resource used for the communication; and a control section that controls UL transmission and/or DL reception using a predetermined communication parameter, based on the information on the partial resource. The reception section receives the information on the partial resource using higher layer signaling, a common control channel which is common to the plurality of communication parameters, or a specific control channel dedicated to each of the communication parameters.
    Type: Grant
    Filed: January 26, 2017
    Date of Patent: October 27, 2020
    Assignee: NTT DOCOMO, INC.
    Inventors: Kazuki Takeda, Hiroki Harada, Kazuaki Takeda, Satoshi Nagata
  • Patent number: 10805055
    Abstract: A system for supporting smooth mobility of a mobile terminal apparatus between a plurality of local areas that are arranged in a wide area is disclosed. The system includes a wide area base station apparatus that covers a wide area, a local area base station apparatus that covers a local area arranged in the wide area, and a mobile terminal apparatus that can communicate with the wide area base station apparatus and the local area base station apparatus, and is configured to scramble a data signal and a reference signal by a scrambling sequence that is common between a plurality of local areas in communication between the local area base station apparatus and the mobile terminal apparatus.
    Type: Grant
    Filed: June 27, 2013
    Date of Patent: October 13, 2020
    Assignee: NTT DOCOMO, INC.
    Inventors: Yoshihisa Kishiyama, Kazuaki Takeda, Satoshi Nagata, Takehiro Nakamura, Hideaki Takahashi, Sadayuki Abeta, Hiroyuki Ishii
  • Publication number: 20200322978
    Abstract: A terminal is disclosed that includes a receiver that receives higher layer signaling that indicates a periodic time period in which uplink transmission is not performed and a processor that monitors downlink control information for scheduling system information in the time period. In other aspects, a radio communication method and a base station are disclosed.
    Type: Application
    Filed: June 19, 2020
    Publication date: October 8, 2020
    Applicant: NTT DOCOMO, INC.
    Inventors: Kazuki Takeda, Yoshihisa Kishiyama, Hiroki Harada, Kazuaki Takeda, Satoshi Nagata
  • Publication number: 20200322991
    Abstract: There is provided user equipment of a radio communication system including a base station and the user equipment, the user equipment includes a receiver that receives a plurality of user equipment identifier candidates from the base station; a selector that selects one user equipment identifier from the plurality of user equipment identifier candidates; and a transmitter that transmits a signal of an uplink shared channel using the one user equipment identifier that is selected, without performing contention resolution of the user equipment identifier used by the user equipment with the base station.
    Type: Application
    Filed: March 16, 2017
    Publication date: October 8, 2020
    Applicants: NTT DOCOMO, INC., NTT DOCOMO, INC.
    Inventors: Yousuke Sano, Kazuaki Takeda, Satoshi Nagata
  • Patent number: 10798563
    Abstract: The present invention provides a method for configuring a hybrid automatic repeat request (HARQ) mode in a base station, a communication method for use by user terminal supporting communication capabilities of the first type, a base station and user terminal. This user terminal includes a transmission section that transmits information about a capability for supporting HARQ bundling, to a radio base station, and the transmission section transmits bundled HARQ-ACKs to the radio base station based on the capability.
    Type: Grant
    Filed: August 10, 2017
    Date of Patent: October 6, 2020
    Assignee: NTT DOCOMO, INC.
    Inventors: Kazuaki Takeda, Satoshi Nagata, Naoto Ookubo, Qin Mu, Liu Liu, Huiling Jiang
  • Publication number: 20200305123
    Abstract: The present invention is designed to make it possible to acquire broadcast information in a suitable manner. According to one aspect of the present invention, a user terminal has a receiving section that receives a synchronization signal and a broadcast signal, and a control section that specifies a frequency hopping pattern that is applied to the broadcast signal based on the synchronization signal.
    Type: Application
    Filed: March 27, 2017
    Publication date: September 24, 2020
    Applicant: NTT DOCOMO, INC.
    Inventors: Kazuaki Takeda, Yousuke Sano, Kazuki Takeda, Satoshi Nagata
  • Publication number: 20200304274
    Abstract: A user terminal according to one aspect of the present disclosure includes: a transmission section that transmits an uplink control channel over multiple slots; and a control section that, when changing an active Bandwidth Part (BWP) during the transmission of the uplink control channel, controls the transmission of the uplink control channel after the BWP changing. According to the one aspect of the present disclosure, it is possible to prevent a communication throughput from lowering even when a BWP is switched.
    Type: Application
    Filed: November 24, 2017
    Publication date: September 24, 2020
    Applicant: NTT DOCOMO, INC.
    Inventors: Yuki Matsumura, Kazuaki Takeda, Kazuki Takeda, Satoshi Nagata
  • Publication number: 20200305187
    Abstract: A user equipment is disclosed including a processor that selects a parameter set from a parameter set group generated by grouping radio parameters used for transmission of an uplink signal or reception of a downlink signal, and selects a radio parameter to be applied to the uplink signal or the downlink signal from the selected parameter set, and a transceiver that performs the transmission of the uplink signal or the reception of the downlink signal using the selected radio parameter.
    Type: Application
    Filed: March 30, 2017
    Publication date: September 24, 2020
    Applicant: NTT DOCOMO, INC.
    Inventors: Kazuaki Takeda, Yousuke Sano, Kazuki Takeda, Satoshi Nagata, Qin Mu, Liu Liu
  • Publication number: 20200304270
    Abstract: A terminal is disclosed that includes a transmitter that performs uplink (UL) transmission without a UL grant using a resource configured by higher layer signaling, a receiver that receives retransmission command information, which indicates a retransmission command for the UL transmission, and a processor that controls a resource used for retransmission of the UL transmission by units of symbols based on the retransmission command information. In other aspects, a base station and a radio communication method for a terminal are disclosed.
    Type: Application
    Filed: June 8, 2020
    Publication date: September 24, 2020
    Applicant: NTT DOCOMO, INC.
    Inventors: Hiroki Harada, Kazuaki Takeda, Kazuki Takeda, Satoshi Nagata