Patents by Inventor Yuichi Kakishima
Yuichi Kakishima 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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Publication number: 20220303832Abstract: A communication device includes a control unit that determines whether Quality of Service (QoS) is not to be configured for each of one or more conditions for determining a requirement that determines radio communication quality provided by the QoS or the requirement is to be configured for the QoS; and a communication unit that executes a radio communication in which QoS is not to be provided in a case where the control unit does not configure the QoS, and executes a radio communication in which QoS is to be provided in a case where the control unit configures the requirement for the QoS.Type: ApplicationFiled: May 27, 2020Publication date: September 22, 2022Applicant: NTT DOCOMO, INC.Inventors: Daiki Takeda, Yuichi Kakishima, Koji Hiratsuka, Hiroki Ishizuka, Akio Gouda, Masashi Anzawa, Kouta Oguni
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Publication number: 20220286880Abstract: A terminal includes a receiver that receives an instruction signal indicating to modify a configuration of a radio link monitoring; and a controller that modifies a parameter used for the configuration of the radio link monitoring in accordance with the instruction signal received by the receiver.Type: ApplicationFiled: August 15, 2019Publication date: September 8, 2022Applicant: NTT DOCOMO, INC.Inventors: Yuichi Kakishima, Tooru Uchino, Takuma Takada, Xiaolin Hou, Lihui Wang
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Patent number: 11438965Abstract: A user equipment (UE) includes a receiver that receives, from a base station (BS), one or more Transmission Configuration Indication (TCI) states for Physical Downlink Control Channel (PDCCH) reception via Radio Resource Control (RRC) signaling and a Medium Access Control Control Element (MAC CE) activation command for one of the TCI states via a Physical Downlink Shared Channel (PDSCH). The UE further includes a transmitter that transmits, to the BS, a Hybrid Automatic Repeat reQuest (HARQ) for the MAC CE activation command in a slot and a processor that activates the one of the TCI states k slots after the slot where the transmitter transmits the HARQ. A value of the k indicates a number of slots.Type: GrantFiled: January 18, 2019Date of Patent: September 6, 2022Assignee: NTT DOCOMO, INC.Inventors: Yuichi Kakishima, Satoshi Nagata, Toru Uchino, Min Liu, Chongning Na
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Publication number: 20220278880Abstract: A terminal according to one aspect of the present disclosure includes: a control section that assumes that a frequency domain orthogonal cover code (FD-OCC) having a sequence length of a number larger than two is applied to a demodulation reference signal mapped to a pair of resource elements the number of which is greater than two and that are being different in frequency; and a transmitting/receiving section that performs transmission processing or reception processing of the demodulation reference signal, based on the FD-OCC. According to one aspect of the present disclosure, even when there are terminals according to different releases, each of the terminals can appropriately perform communication.Type: ApplicationFiled: August 2, 2019Publication date: September 1, 2022Applicant: NTT DOCOMO, INC.Inventors: Yuki Matsumura, Yuichi Kakishima, Satoshi Nagata
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Publication number: 20220279360Abstract: A terminal according to one aspect of the present disclosure includes: a receiving section that receives a signal over a plurality of resources; and a control section that multiplies the signal thus received, by a value in an orthogonal cover code (OCC) for each resource in the plurality of resources, and measures a channel state information (CSI)—reference signal (RS) obtained by adding results of the multiplication. The resource is a period longer than a resource block or a symbol. According to one aspect of the present disclosure, a CSI-RS transmitted by using a larger number of CSI-RS ports can be appropriately measured.Type: ApplicationFiled: August 2, 2019Publication date: September 1, 2022Applicant: NTT DOCOMO, INC.Inventors: Yuki Matsumura, Yuichi Kakishima, Satoshi Nagata
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Publication number: 20220271889Abstract: A terminal according to an aspect of the present disclosure includes a control section that reduces a resource to which at least one of an uplink channel and a sounding reference signal (SRS) is mapped, in a case that a first resource provided for the uplink channel overlaps a second resource provided for the SRS, and a transmitting section that performs at least one of a transmission of the uplink channel and a transmission of the SRS. According to an aspect of the present disclosure, in a case that a resource provided for an uplink transmission overlaps a resource provided for an SRS, appropriate processing is performed.Type: ApplicationFiled: August 8, 2019Publication date: August 25, 2022Applicant: NTT DOCOMO, INC.Inventors: Yuki Matsumura, Yuichi Kakishima, Satoshi Nagata
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Publication number: 20220263599Abstract: A terminal according to one aspect of the present disclosure includes: a receiving section that receives information related to a channel state information reference signal (CSI-RS) of a terminal according to an old release; and a control section that performs control of applying rate match or puncture to a specific channel or signal regarding a resource of the CSI-RS of the terminal according to the old release. According to one aspect of the present disclosure, even when there are terminals according to different releases, each of the terminals can appropriately perform communication.Type: ApplicationFiled: July 19, 2019Publication date: August 18, 2022Applicant: NTT DOCOMO, INC.Inventors: Yuki Matsumura, Yuichi Kakishima, Satoshi Nagata
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Patent number: 11418246Abstract: The present invention provides a user terminal that reports channel state information to base station apparatus in order to reduce the overhead of signaling required in beam measurements and to lower the complexity of beam measurements and calculation, and, in this user terminal, a receiving section that receives basis beam reference signals, each included in one or a plurality of basis beams transmitted from the base station, a determining section that determines a leading beam and a secondary beam to combine with the leading beam, based on the basis beam reference signals received, and a transmission section that transmits combination information about combination of the leading beam and the secondary beam to the base station apparatus, are provided.Type: GrantFiled: August 10, 2017Date of Patent: August 16, 2022Assignee: NTT DOCOMO, INC.Inventors: Satoshi Nagata, Huiling Li, Chongning Na, Huiling Jiang, Yuichi Kakishima
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Patent number: 11411694Abstract: A method of aperiodic signal transmission from a base station (BS) to a user equipment (UE) includes transmitting, from the BS to the UE, reservation information indicating first resources reserved for aperiodic signal transmission via higher layer signaling, transmitting, from the BS to the UE, Downlink Control Information (DCI) indicating at least a second resource to be selected based on the first resources, and transmitting, from the BS to the UE, the aperiodic signals using the first resources.Type: GrantFiled: March 31, 2017Date of Patent: August 9, 2022Assignee: NTT DOCOMO, INC.Inventors: Yuichi Kakishima, Satoshi Nagata, Chongning Na
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Publication number: 20220224379Abstract: User equipment includes a control unit configured to determine a spatial reception parameter of a channel, based on quasi co-location (QCL) information related to a synchronization signal or a reference signal; and a reception unit configured to receive the channel based on the determined spatial reception parameter. In the QCL information, a QCL parameter applied to a source signal is partially or entirely different from a QCL parameter applied to a destination signal.Type: ApplicationFiled: May 31, 2019Publication date: July 14, 2022Applicant: NTT DOCOMO, INC.Inventors: Yuichi Kakishima, Yuki Matsumura
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Patent number: 11375384Abstract: A method for wireless communication includes transmitting, with a base station (BS), multiple first signals using respectively different radio resources. The multiple first signals include a common signal component. The radio resource is identified by a radio resource ID. The method further includes receiving, with a user equipment (UE), out of the radio resources the multiple first signals from the BS, selecting, with the UE, a radio resource based on a reception quality of the multiple first signals, transmitting, from the UE to the BS, feedback information including the radio resource ID corresponding to the selected radio resource, and transmitting, from the BS to the UE, a second signal using the radio resource corresponding to the received radio resource ID.Type: GrantFiled: February 3, 2017Date of Patent: June 28, 2022Assignee: NTT DOCOMO, INC.Inventors: Yuichi Kakishima, Satoshi Nagata, Chongning Na
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Patent number: 11374616Abstract: A terminal is disclosed including a transmitter that transmits an uplink shared channel; and a processor that determines, when frequency hopping is applied to the uplink shared channel, a symbol for a demodulation reference signal of the uplink shared channel based on a mapping type of the uplink shared channel by using a start symbol of each hop as a reference point. In other aspects, a radio communication method is also disclosed.Type: GrantFiled: February 26, 2019Date of Patent: June 28, 2022Assignee: NTT DOCOMO, INC.Inventors: Hideyuki Moroga, Satoshi Nagata, Yuichi Kakishima
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Publication number: 20220201504Abstract: A user equipment includes a reception unit that performs a measurement for determining an optimum beam from among a plurality of reception beams that is usable in the user equipment; and a control unit that selects, based on information of a past measurement by the reception unit, a reception beam to be used in the user equipment, upon receiving, by the reception unit, a signal including information indicating to update a configuration.Type: ApplicationFiled: March 20, 2019Publication date: June 23, 2022Applicant: NTT DOCOMO, INC.Inventors: Naoki Fujimura, Takuma Takada, Yuichi Kakishima
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Patent number: 11357009Abstract: A beam selection method, a base station, and a user equipment are presented. The beam selection method performed by the base station includes: receiving transmission beam group information on the base station and information on receiving capability of a receiving set of a user equipment corresponding to each transmission beam group fed back by the user equipment, where the information on receiving capability of the receiving set is the number of reception beams that the user equipment can simultaneously form in the receiving set; and selecting transmission beams corresponding to the receiving set and used for transmitting information to the user equipment based at least in part on the transmission beam group information and the information on receiving capability of each receiving set.Type: GrantFiled: August 9, 2018Date of Patent: June 7, 2022Assignee: NTT DOCOMO, INC.Inventors: Min Liu, Chongning Na, Xin Wang, Yuichi Kakishima
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Patent number: 11350373Abstract: The present invention is designed to reduce the decrease of uplink throughput in the event a user terminal connects with a plurality of radio base stations. A user terminal (20) according to an example of the present invention provides a user terminal to connect with a plurality of radio base stations including at least a first radio base station and a second radio base station, and this user terminal has a PH report generating section (411) that calculates the PH (Power Headroom) of each radio base station and generates PH reports, and a transmission section (203) that transmits either the PUSCH (Physical Uplink Shared Channel) bandwidth of the first radio base station, a PH report per resource block, or information about the transmission power density, and a PH report for the first radio base station, to the second radio base station.Type: GrantFiled: March 18, 2015Date of Patent: May 31, 2022Assignee: NTT DOCOMO, INC.Inventors: Kazuki Takeda, Hiroki Harada, Yuichi Kakishima, Tooru Uchino, Liu Liu, Huiling Jiang, Li Zhao, Yong Li, Mugen Peng, Wenbo Wang
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Patent number: 11350291Abstract: In a mobile communication system including a base station provided with a plurality of antenna ports, and user equipment that executes radio communication with the base station, the base station transmits a beam stream including a first beam for transmitting data to the user equipment, and one or more second beams for transmitting a precoded reference signal in a direction toward a vicinity of the first beam; and upon receiving the beam stream, the user equipment selects, from the first beam and the second beam, and transmits, to the base station, one or more suitable beam indexes.Type: GrantFiled: November 27, 2014Date of Patent: May 31, 2022Assignee: NTT DOCOMO, INC.Inventors: Yuichi Kakishima, Satoshi Nagata
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Patent number: 11336382Abstract: A terminal is disclosed including a receiver that receives a demodulation reference signal; and a processor that controls reception of the demodulation reference signal based on a parameter related to mapping of the demodulation reference signal, wherein when the parameter is configured to a specific value, a specific multiplexing method for the demodulation reference signal is supported. In other aspects, another terminal is also disclosed.Type: GrantFiled: September 14, 2017Date of Patent: May 17, 2022Assignee: NTT DOCOMO, INC.Inventors: Keisuke Saito, Kazuaki Takeda, Satoshi Nagata, Yuichi Kakishima
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Patent number: 11330528Abstract: Communication is suitably continued even when communication is performed by using a plurality of waveforms. A user terminal according to one aspect of the present invention includes: a transmission section that transmits a first signal and a second signal by using respectively different radio resources, the first signal conforming to a first transmission scheme-based waveform and the second signal conforming to a second transmission scheme-based waveform; and a control section that performs transmit power control on a signal to be transmitted.Type: GrantFiled: December 14, 2017Date of Patent: May 10, 2022Assignee: NTT DOCOMO, INC.Inventors: Ryosuke Osawa, Kazuki Takeda, Yuichi Kakishima
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Patent number: 11317426Abstract: According to an aspect of the present invention, there is provided a radio resource scheduling method, wherein the method includes generating format information, wherein the format information specifies a format of resource allocation information, the format corresponding to a number of a plurality of mobile stations that simultaneously perform communication with the radio base station; generating the resource allocation information provided with the format specified by the format information corresponding to radio resources allocated to the plurality of mobile stations; and transmitting, to the plurality of mobile stations, the resource allocation information.Type: GrantFiled: August 8, 2016Date of Patent: April 26, 2022Assignee: NTT DOCOMO, INC.Inventors: Satoshi Nagata, Yuichi Kakishima, Xin Wang, Chongning Na, Xiaolin Hou, Huiling Jiang
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Patent number: 11303408Abstract: A reference signal transmission and reception method is presented. The transmission method includes: transmitting a plurality of first reference signals; and transmitting a plurality of groups of second reference signals, where each first reference signal corresponds to one of the plurality of groups of second reference signal, and the group of second reference signals includes a plurality of second reference signals, where a part of reference signals in the group of second reference signals include quasi co-located information, and the quasi co-located information indicates a correlation between resources for the group of second reference signals including the quasi co-located information and resources for the first reference signal corresponding to the group of second reference signals.Type: GrantFiled: August 9, 2018Date of Patent: April 12, 2022Assignee: NTT DOCOMO, INC.Inventors: Min Liu, Chongning Na, Xin Wang, Jing Wang, Yuichi Kakishima, Satoshi Nagata