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).
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Patent number: 11575489Abstract: A terminal is disclosed including a receiver that receives information indicating one of a first Resource Block Group (RBG) configuration and a second RBG configuration by which a plurality of RBG size candidates are respectively configured, and a processor that determines a RBG size out of RBG size candidates included in an RBG configuration selected out of the first RBG configuration and the second RBG configuration. In other aspects a radio communication method is also disclosed.Type: GrantFiled: June 15, 2017Date of Patent: February 7, 2023Assignee: NTT DOCOMO, INC.Inventors: Kazuki Takeda, Kazuaki Takeda, Satoshi Nagata
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Patent number: 11553491Abstract: The present invention is designed so that it is possible to communicate adequately depending on user terminal-specific capabilities, in a system where wide frequency bands are supported. A user terminal has a receiving section that receives band information, which indicates a prospective downlink (DL) band, which is a band where a DL signal might be allocated, and/or a prospective uplink (UL) band, which is a band where a UL signal might be allocated, and a control section that configures the DL band candidate and/or the UL band candidate in a user terminal-specific manner based on the band information.Type: GrantFiled: September 29, 2017Date of Patent: January 10, 2023Assignee: NTT DOCOMO, INC.Inventors: Hiroki Harada, Kazuaki Takeda, Kazuki Takeda, Satoshi Nagata
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Patent number: 11552742Abstract: A user equipment includes a receiving unit configured to receive a first signal of inter-terminal direct communication transmitted from a first user equipment, and information indicating a first resource for transmitting a HARQ (Hybrid Automatic Repeat Request) response corresponding to the first signal of inter-terminal direct communication transmitted from either one of a base station apparatus or the first user equipment; a control unit configured to determine the HARQ response based on a reception result of the first signal of inter-terminal direct communication; and a transmitting snit configured to transmit the determined HARQ response to the base station apparatus or the first user equipment, by using the first resource for transmitting the HARQ response.Type: GrantFiled: July 17, 2018Date of Patent: January 10, 2023Assignee: NTT DOCOMO, INC.Inventors: Ryosuke Osawa, Yuki Matsumura, Kazuaki Takeda, Huan Wang, Xiaolin Hou
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Patent number: 11540320Abstract: In order to realize appropriate communications in a next generation communication system, the present invention provides a user terminal including: a reception section that receives broadcast information transmitted from a radio base station; and a control section that controls reception in a random access procedure. The reception section receives given broadcast information in the random access procedure. The given broadcast information may be broadcast information for a specific user terminal group.Type: GrantFiled: January 12, 2017Date of Patent: December 27, 2022Assignee: NTT DOCOMO, INC.Inventors: Kazuaki Takeda, Kazuki Takeda, Satoshi Nagata
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Patent number: 11528729Abstract: To properly transmit uplink control information (UCI) in future radio communication systems, a user terminal of the present invention is provided with a transmitting section that transmits uplink control information (UCI) in at least one of a plurality of slots with different time lengths of UL duration, and a control section that controls transmission of the UCI, where based on an explicit instruction from a radio base station or an implicit determination by the user terminal, the control section controls an uplink (UL) control channel used in transmission of the UCI.Type: GrantFiled: October 31, 2017Date of Patent: December 13, 2022Assignee: NTT DOCOMO, INC.Inventors: Kazuki Takeda, Yuki Matsumura, Kazuaki Takeda, Satoshi Nagata, Lihui Wang
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Patent number: 11528709Abstract: A terminal is disclosed including a receiver that receives a signal of a downlink shared channel; and a transmitter that transmits Acknowledgement (ACK)/Negative Acknowledgement (NACK) information for the signal of the downlink shared channel using an uplink control channel in a time resource included in a plurality of time resource candidates. In other aspects, a radio communication method and a base station are also disclosed.Type: GrantFiled: August 29, 2017Date of Patent: December 13, 2022Assignee: NTT DOCOMO, INC.Inventors: Hideyuki Moroga, Kazuaki Takeda, Satoshi Nagata
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Patent number: 11516851Abstract: To suitably perform a random access procedure (e.g., random access preamble transmission) in future radio communication systems, a user terminal for communicating with a cell where predetermined numerology is applied has a control section that controls a random access procedure in the cell, and a transmission section that transmits a random access preamble with a predetermined subcarrier spacing applied among random access preambles for supporting a plurality of subcarrier spacings.Type: GrantFiled: July 14, 2017Date of Patent: November 29, 2022Assignee: NTT DOCOMO, INC.Inventors: Kazuaki Takeda, Kazuki Takeda, Satoshi Nagata
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Publication number: 20220377589Abstract: A terminal (200) includes a receiving unit (203) that receives a reference signal within a specified measurement period, a control unit (213) that acquires an average or statistical information of layer 1 reception qualities of the reference signal, the layer 1 reception qualities being measured within the measurement period, and a transmitting unit (201) that transmits the average or the statistical information to a communication node (100a or 100b).Type: ApplicationFiled: September 20, 2019Publication date: November 24, 2022Applicant: NTT DOCOMO, INC.Inventors: Eina Hashimoto, Kazuaki Takeda, Akihiro Kawana, Tianyang Min
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Patent number: 11497017Abstract: A base station apparatus performs communication with a user apparatus and includes a setting unit that arranges a reference signal used for phase correction in a radio frame at a predetermined interval and a transmitting unit that transmits the radio frame to the user apparatus, and, in a case in which the reference signal used for the phase correction is punctured in the radio frame, the reference signal used for the phase correction is arranged in a resource of the radio frame in which the reference signal used for the phase correction is arrangeable.Type: GrantFiled: September 25, 2017Date of Patent: November 8, 2022Assignee: NTT DOCOMO, INC.Inventors: Keisuke Saito, Kazuaki Takeda, Satoshi Nagata, Yuichi Kakishima
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Patent number: 11489652Abstract: A user terminal according to one aspect of the present disclosure includes a receiving section that receives downlink control information indicating transmission and/or reception of data, and a control section that controls activation and/or deactivation of one or more bandwidth parts (BWPs), based on a field included in the downlink control information. According to one aspect of the present disclosure, it is possible to prevent deterioration in reception quality even when PUCCHs of a plurality of UEs commonly use the same resource block.Type: GrantFiled: September 7, 2017Date of Patent: November 1, 2022Assignee: NTT DOCOMO, INC.Inventors: Kazuki Takeda, Satoshi Nagata, Kazuaki Takeda
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Patent number: 11490455Abstract: Disclosed is a scheme of transmitting various types of radio signals for which interference between adjacent cells is considered in a radio communication system (for example, dynamic TDD) in which uplink communication and downlink communication can be dynamically switched. A feature of the present invention relates to user equipment including a transceiver that performs transmission and reception of a radio signal with a base station in accordance with a communication scheme in which uplink communication and downlink communication are dynamically switched and a signal processor that processes the radio signal, wherein the transceiver transmits a connection request signal generated by the signal processor in fixed uplink radio resources of the communication scheme.Type: GrantFiled: October 31, 2017Date of Patent: November 1, 2022Assignee: NTT DOCOMO, INC.Inventors: Yousuke Sano, Kazuki Takeda, Kazuaki Takeda, Daiki Takeda, Daisuke Murayama, Satoshi Nagata
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Patent number: 11477773Abstract: A terminal and base station are disclosed where the terminal includes a receiver that receives a signal of a downlink shared channel and a processor that controls reception of a demodulation reference signal included in the downlink shared channel. The processor controls reception of a demodulation reference signal based on one of a first mapping method or a second mapping method. The first mapping method being a method in which the demodulation reference signal is mapped to a fixed symbol within a slot of the downlink shared channel, and the second mapping method being a method in which the demodulation reference signal is mapped to a top symbol of symbols for which the downlink shared channel is scheduled.Type: GrantFiled: December 1, 2017Date of Patent: October 18, 2022Assignee: NTT DOCOMO, INC.Inventors: Keisuke Saito, Yousuke Sano, Kazuaki Takeda, Satoshi Nagata
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Patent number: 11477738Abstract: Provided are a method and device for uplink power control. A user terminal performing the method includes: a receiving unit configured to receive signature information for the user terminal from a base station; and a control unit configured to determine a transmission power of the user terminal according to the received signature information.Type: GrantFiled: September 28, 2018Date of Patent: October 18, 2022Assignee: NTT DOCOMO, INC.Inventors: Runxin Wang, Wenjia Liu, Xiaolin Hou, Kazuaki Takeda, Daiki Takeda
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Patent number: 11456839Abstract: A user equipment (UE) is disclosed including a receiver that receives, from a base station (BS), Zero Power (ZP) Channel State Information-Reference Signal (CSI-RS) resource configuration information and a ZP CSI-RS. The ZP CSI-RS is transmitted as a periodic ZP CSI-RS, a semi-persistent ZP CSI-RS, or an aperiodic ZP CSI-RS. When the ZP-CSI-RS is transmitted as the periodic ZP CSI-RS or the semi-persistent ZP CSI-RS, the ZP CSI-RS resource configuration information designates periodicity and a timing offset for the periodic ZP CSI RS or the semi-persistent ZP-CSI-RS. The receiver receives the ZP CSI-RS based on a ZP CSI RS resource specified using the periodicity and the timing offset. When the ZP CSI-RS is transmitted as the aperiodic ZP CSI-RS, the receiver receives DCI that triggers the aperiodic ZP CSI-RS. The receiver receives the ZP CSI-RS based on a ZP CSI-RS resource specified using the DCI.Type: GrantFiled: February 2, 2018Date of Patent: September 27, 2022Assignee: NTT DOCOMO, INC.Inventors: Yuichi Kakishima, Chongning Na, Kazuaki Takeda, Satoshi Nagata
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Patent number: 11445527Abstract: This user terminal is equipped with a receiving unit which receives, from a base station device, a downlink signal which includes a demodulation reference signal for a plurality of ports multiplexed in the time direction; a control unit which separates, from the downlink signal, the demodulation reference signal for the port assigned to the host device; and a channel estimation unit which calculates a channel estimation value using the separated demodulation reference signal. The control unit specifies the multiplexing method for the plurality of ports selected on the basis of at least one of carrier frequency, propagation environment, user terminal performance and base station performance, and separates the demodulation reference signal according to the specified multiplexing method.Type: GrantFiled: June 15, 2017Date of Patent: September 13, 2022Assignee: NTT DOCOMO, INC.Inventors: Keisuke Saito, Kazuaki Takeda, Satoshi Nagata
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Patent number: 11425787Abstract: A receiving apparatus is disclosed including a receiver that receives a downlink shared channel using a first allocation that supports a first allocation interval and a first allocation start symbol, and a second allocation that supports a second allocation interval and a second allocation start symbol, the first allocation interval and the first allocation start symbol being different from the second allocation interval and the second allocation start symbol, respectively; and a processor that applies a reference signal configuration type, notified by a higher layer, to a first reference signal used in a downlink shared channel that applies the first allocation, and to a second reference signal used in a downlink shared channel that applies the second allocation. In other aspects, a transmitting apparatus is also disclosed.Type: GrantFiled: July 28, 2017Date of Patent: August 23, 2022Assignee: NTT DOCOMO, INC.Inventors: Keisuke Saito, Kazuaki Takeda, Kazuki Takeda, Satoshi Nagata, Lihui Wang, Xiaolin Hou
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Patent number: 11405856Abstract: A user equipment in a mobile communication system including a base station and the user equipment, including: a mode determining unit that receives instruction information indicating a transmission mode of broadcast information from the base station and determines the transmission mode based on the instruction information; and a receiving unit that performs a reception operation of the broadcast information according to the transmission mode determined by the mode determining unit.Type: GrantFiled: March 29, 2017Date of Patent: August 2, 2022Assignee: NTT DOCOMO, INC.Inventors: Yousuke Sano, Kazuaki Takeda, Satoshi Nagata, Qin Mu, Liu Liu, Huiling Jiang
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Patent number: 11405949Abstract: This invention aims to appropriately perform random access even when a shortened TTI is used. A user terminal includes a control section which controls communication using cells including at least two cells having different TTIs (Transmission Time Intervals), a transmission section which transmits a random access preamble, and a reception section which receives a response signal to the random access preamble, wherein the control section performs control to receive in a second cell, the response signal to the random access preamble transmitted in a first cell.Type: GrantFiled: August 19, 2016Date of Patent: August 2, 2022Assignee: NTT DOCOMO, INC.Inventors: Kazuki Takeda, Kazuaki Takeda, Hiroki Harada, Satoshi Nagata
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Publication number: 20220240335Abstract: A terminal includes a reception unit for receiving, from a base station that is a master node, a first message to configure communications with a master cell group and a secondary cell group, a communication unit for performing the communications with the master cell group and the secondary cell group configured that are based on the first message, a control unit for detecting an occurrence of a failure in communications with the secondary cell group, and a transmission unit for transmitting, when the control unit detects the occurrence of the failure in the communications with the secondary cell group, a second message including information indicating the occurrence of the failure in the secondary cell group, wherein the control unit includes location information in the second message when the first message is configured to have information indicating that the location information is to be included in the second message.Type: ApplicationFiled: June 7, 2019Publication date: July 28, 2022Applicant: NTT DOCOMO, INC.Inventors: Hideaki Takahashi, Kazuaki Takeda, Tianyang Min
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Patent number: 11381372Abstract: User equipment for transmitting an uplink control channel in multiple cells simultaneously in a radio communication system where transmission of the uplink control channel in a secondary cell is supported is disclosed.Type: GrantFiled: January 15, 2015Date of Patent: July 5, 2022Assignee: NTT DOCOMO, INC.Inventors: Tooru Uchino, Kazuki Takeda, Hideaki Takahashi, Kazuaki Takeda