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).

  • USER TERMINAL AND RADIO COMMUNICATION METHOD
    Publication number: 20210314062
    Abstract: A user terminal according to one aspect of the present disclosure includes a receiving section that receives an instruction to transmit a reference signal for forming spherical coverage, and a transmitting section that transmits the reference signal, forming the spherical coverage, based on the transmission instruction. According to one aspect of the present disclosure, the formation of spherical coverage can be properly controlled.
    Type: Application
    Filed: August 9, 2018
    Publication date: October 7, 2021
    Applicant: NTT DOCOMO, INC.
    Inventors: Yuichi Kakishima, Yuki Matsumura, Xin Wang
  • USER EQUIPMENT AND WIRELESS COMMUNICATION METHOD
    Publication number: 20210297211
    Abstract: A user equipment (UE) is disclosed including a receiver that receives multiple Channel State Information Reference Signals (CSI-RSs) transmitted from a base station (BS) using first resources; wherein each of the multiple CSI-RSs is associated with each of the first resources. The UE includes a processor that performs resource selection in which at least a second resource is selected from the first resources. The UE includes a transmitter that transmits, to the BS, a first indicator that indicates the second resource. When the processor determines that the first resources are out-of-range in the resource selection, the first indicator indicates that the first resources are out-of-range.
    Type: Application
    Filed: February 2, 2018
    Publication date: September 23, 2021
    Applicant: NTT DOCOMO, INC.
    Inventors: Yuichi Kakishima, Chongning Na, Kazuaki Takeda, Satoshi Nagata
  • USER TERMINAL, BASE STATION APPARATUS AND RADIO COMMUNICATION METHOD
    Publication number: 20210297137
    Abstract: 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: Application
    Filed: August 10, 2017
    Publication date: September 23, 2021
    Applicant: NTT DOCOMO, INC.
    Inventors: Satoshi Nagata, Huiling Li, Chongning Na, Huiling Jiang, Yuichi Kakishima
  • User terminal, a feedback method at the user terminal, a base station and a method at the base station
    Patent number: 11128396
    Abstract: Provided are a user terminal, a feedback method at the user terminal, a base station and a method at the base station. The feedback method at the user terminal includes steps of: calculating first information related to receiving signal quality; combining the first information and a response signal to a hybrid automatic repeat request (HARQ) to be transmitted to a base station to generate a combined signal; carrying out signal processing on the combined signal to generate second information; and transmitting the second information to the base station.
    Type: Grant
    Filed: January 5, 2018
    Date of Patent: September 21, 2021
    Assignee: NTT DOCOMO, INC.
    Inventors: Xin Wang, Xiaolin Hou, Chongning Na, Huiling Jiang, Yuichi Kakishima, Kazuaki Takeda, Satoshi Nagata
  • Hybrid channel quality measurement method and user equipment
    Patent number: 11129038
    Abstract: A hybrid channel quality measurement method is presented. The method includes: performing a first channel measurement according to Channel State Information Reference Signals (CSI-RSs), and transmitting a first channel measurement feedback to a base station according to a first channel measurement result; determining whether to perform a second channel measurement feedback based on Demodulation Reference Signals (DMRSs) after the first channel measurement feedback is performed; and performing a second channel measurement according to the DMRSs when determining to perform the second channel measurement feedback, and transmitting the second channel measurement feedback to the base station according to a second channel measurement result.
    Type: Grant
    Filed: May 3, 2018
    Date of Patent: September 21, 2021
    Assignee: NTT DOCOMO, INC.
    Inventors: Min Liu, Xin Wang, Chongning Na, Yuichi Kakishima, Satoshi Nagata
  • Terminal and base station apparatus for arranging and receiving a phase tracking reference signal
    Patent number: 11128514
    Abstract: A terminal includes a processor that arranges a demodulation reference signal (DMRS) in a first resource, and arranges a phase tracking reference signal (PTRS) in an interval of a number of symbols in a second resource with a symbol of the DMRS as a starting point, and a transmitter that transmits, to a base station apparatus, the DMRS and the PTRS that are arranged in the first resource and the second resource, respectively.
    Type: Grant
    Filed: September 25, 2017
    Date of Patent: September 21, 2021
    Assignee: NTT DOCOMO, INC.
    Inventors: Keisuke Saito, Kazuaki Takeda, Satoshi Nagata, Yuichi Kakishima
  • METHOD OF CODEWORD MAPPING AND TRANSMISSION AND RECEPTION POINT
    Publication number: 20210288761
    Abstract: A method of codeword (CW) mapping in a wireless communication system includes determining, with a Transmission and Reception Point (TRP), order of resources mapped to the CW, and mapping, with the TRP, the CW to resources in accordance with the determined order. The order of resources is determined based on a frequency resource, a time resource, and a layer. The determining determines the order based on a type of re¬ transmission control. The type of re-transmission control is CW-level Hybrid Automatic Repeat Request (HARQ) and code block group (CBG)-level HARQ. When the CW-level HARQ is applied, the determining determines the order as order of the layer, the frequency resource, and the time resource. When the CBG-level HARQ is applied, the determining determines the order as order of the frequency resource, the layer, and the time resource.
    Type: Application
    Filed: May 3, 2018
    Publication date: September 16, 2021
    Applicant: NTT DOCOMO, INC.
    Inventors: Yuichi Kakishima, Kazuki Takeda, Yosuke Sano, Lihui Wang, Satoshi Nagata
  • WIRELESS COMMUNICATION METHOD AND BASE STATION
    Publication number: 20210289562
    Abstract: A wireless communication method includes transmitting, from a base station (BS), multiple downlink (DL) signals. The wireless communication method further includes receiving, with a user equipment (UE), two or more DL signals of the multiple DL signals, and notifying, with the BS, the UE of a number of the two or more DL signals. The two or more DL signals are associated with a Physical Random Access Channel (PRACH) resource.
    Type: Application
    Filed: September 28, 2017
    Publication date: September 16, 2021
    Applicant: NTT DOCOMO, INC.
    Inventors: Le Liu, Yuichi Kakishima
  • USER TERMINAL AND RADIO COMMUNICATION METHOD
    Publication number: 20210289535
    Abstract: A user terminal (20) includes a reception section that receives a first radio signal transmitted by a first transmission point using a first radio resource and a second radio signal transmitted by a second transmission point using a second radio resource, and a control section that controls reception processing of the first radio signal transmitted by the first transmission point using the first radio resource and the second radio signal transmitted by the second transmission point using the second radio resource on assumption that the first radio resource and the second radio resource are permitted to be configured to at least one of different times and different frequency bands.
    Type: Application
    Filed: June 28, 2018
    Publication date: September 16, 2021
    Applicant: NTT DOCOMO, INC.
    Inventors: Yuichi Kakishima, Yuki Matsumura, Satoshi Nagata
  • METHOD OF TRANSMISSION IN UNLICENSED BAND AND NODE PERFORMING CLEAR CHANNEL ASSESSMENT
    Publication number: 20210289550
    Abstract: A method of transmission from a first node to a second node in an unlicensed band includes performing, with the first node, a directional clear channel assessment (CCA) to which a spatial filter is applied in the unlicensed band. The method further includes transmitting, from the first node to a second node, a signal after the first transceiver has performed the CCA. The spatial filter is applied to the signal. The method further includes transmitting, from the second node to the first node, capability information that indicates whether the second node is able to use spatial filtering. The method further includes notifying, with the first node, the second node of a resource to calculate the spatial filter in the second node.
    Type: Application
    Filed: August 21, 2017
    Publication date: September 16, 2021
    Applicants: NTT DOCOMO, INC., NTT DOCOMO, INC.
    Inventors: Le Liu, Yuichi Kakishima
  • User terminal and radio communication method
    Patent number: 11122544
    Abstract: A terminal is disclosed including a processor and a transmitter. The processor determines, based on a threshold of a criterion, a beam having the criterion that is equal to or greater than the threshold. Further, the transmitter transmits a random access preamble based on the determined beam. In other aspects, a radio communication method for a terminal is also disclosed.
    Type: Grant
    Filed: May 1, 2017
    Date of Patent: September 14, 2021
    Assignee: NTT DOCOMO, INC.
    Inventors: Ryosuke Osawa, Hiroki Harada, Yuichi Kakishima
  • User equipment and method of SRS transmission
    Patent number: 11121837
    Abstract: A user equipment (UE) is disclosed including a receiver that receives Sounding Reference Symbol (SRS) configuration information that indicates a first resource used for transmission of a predetermined reference signal from a base station (BS). The UE includes a transmitter that transmits an SRS using a second resource that is the first resource. The UE further includes a processor that determines a precoder applied to the SRS based on the predetermined reference signal. The transmitter transmits the SRS precoded using the determined precoder. The predetermined reference signal is a Channel State Information Reference Signal (CSI-RS), an SRS, or a Synchronization Signal Block (SSB)/Physical Broadcast Channel (PBCH).
    Type: Grant
    Filed: February 2, 2018
    Date of Patent: September 14, 2021
    Assignee: NTT DOCOMO, INC.
    Inventors: Yuichi Kakishima, Ryosuke Osawa, Kazuaki Takeda, Satoshi Nagata
  • USER EQUIPMENT AND BASE STATION APPARATUS
    Publication number: 20210282099
    Abstract: A user equipment communicates with a first user equipment or a base station apparatus, the user equipment including a receiving unit configured to receive a synchronization signal or a reference signal used in sidelink transmitted from the first user equipment; a control unit configured to measure a channel state of sidelink, based on the synchronization signal or the reference signal; and a transmitting unit configured to transmit, to the base station apparatus or the first user equipment, information indicating the channel state of sidelink.
    Type: Application
    Filed: July 9, 2018
    Publication date: September 9, 2021
    Applicant: NTT DOCOMO, INC.
    Inventors: Ryosuke Osawa, Yuichi Kakishima, Huan Wang
  • USER TERMINAL AND RADIO COMMUNICATION METHOD
    Publication number: 20210282029
    Abstract: A user terminal according to one aspect of the present disclosure includes: a transmitting section that transmits an uplink signal; and a control section that uses, for the uplink signal, a sequence corresponding to information including whether change of a beam is necessary. According to one aspect of the present disclosure, overhead of a beam report can be reduced appropriately.
    Type: Application
    Filed: July 27, 2018
    Publication date: September 9, 2021
    Applicant: NTT DOCOMO, INC.
    Inventors: Yuki Matsumura, Yuichi Kakishima, Satoshi Nagata
  • WIRELESS COMMUNICATION METHOD, USER EQUIPMENT, BASE STATION, AND SYSTEM
    Publication number: 20210273762
    Abstract: A wireless communication method includes transmitting, from a base station (BS) to a user equipment (UE), a configuration information indicating a resource used in transmission of a Channel State Information-Reference Signal (CSI-RS) by higher layer signaling; and receiving, with the UE, the CSI-RS from the BS based on the configuration information. The configuration information indicates a mapping for CSI-RS transmission using a single antenna port (AP) to a single resource element per a resource block. In other aspects, a UE, a BS, and a system are also disclosed.
    Type: Application
    Filed: May 21, 2021
    Publication date: September 2, 2021
    Applicant: NTT DOCOMO, INC.
    Inventors: Yuichi Kakishima, Chongning Na, Satoshi Nagata
  • USER TERMINAL AND BASE STATION
    Publication number: 20210274487
    Abstract: A user terminal according to one aspect of the present disclosure includes: a receiving section that receives a Physical Downlink Control Channel (PDCCH); and a control section that, when low latency beam selection is configured by a higher layer signaling, assumes that a same spatial domain filter is used for transmission of the PDCCH and transmission and reception of a specific channel. According to one aspect of the present disclosure, it is possible to switch a TCI state or a beam of a channel at a high speed.
    Type: Application
    Filed: July 13, 2018
    Publication date: September 2, 2021
    Applicant: NTT DOCOMO, INC.
    Inventors: Yuki Matsumura, Yuichi Kakishima, Satoshi Nagata, Jing Wang, Xiaolin Hou
  • USER EQUIPMENT AND BASE STATION APPARATUS
    Publication number: 20210266995
    Abstract: The user equipment comprises a reception unit configured to receive allocation information of reference signals from a base station apparatus or a first user equipment, the reference signals being used in a device-to-device direct communication; a control unit for determining a device-to-device direct communication signal based on the allocation information of reference signals used in the device-to-device direct communication; and a transmitter configured to transmit the determined device-to-device direct communication signal to a second user equipment, wherein the allocation information of reference signals used in the device-to-device direct communication includes a transmission density of the reference signals used in the device-to-device direct communication.
    Type: Application
    Filed: July 24, 2018
    Publication date: August 26, 2021
    Applicant: NTT DOCOMO, INC.
    Inventors: Ryosuke Osawa, Yuichi Kakishima, Satoshi Nagata
  • USER EQUIPMENT
    Publication number: 20210258887
    Abstract: A user equipment for performing inter-terminal direct communication with one or a plurality of user equipments, includes a receiving unit configured to receive a synchronization signal or a reference signal transmitted from the plurality of user equipments; a control unit configured to control transmission power of the inter-terminal direct communication, based on the received synchronization signal or the received reference signal transmitted from the plurality of user equipments; and a transmitting unit configured to perform transmission of the inter-terminal direct communication by applying the controlled transmission power, to at least one of the plurality of user equipments.
    Type: Application
    Filed: July 3, 2018
    Publication date: August 19, 2021
    Applicant: NTT DOCOMO, INC.
    Inventors: Ryosuke Osawa, Yuichi Kakishima, Kazuaki Takeda
  • USER DEVICE
    Publication number: 20210258923
    Abstract: A user device includes a control unit that arranges a reference signal or a gap in a signal of D2D direct communication and a transmitting unit that transmits the signal of the D2D direct communication and information related to the reference signal or the gap to another user device.
    Type: Application
    Filed: September 27, 2018
    Publication date: August 19, 2021
    Applicant: NTT DOCOMO, INC.
    Inventors: Yuichi Kakishima, Ryosuke Osawa
  • Terminal and radio communication method using multiple waveforms
    Patent number: 11082931
    Abstract: According to one aspect of the present invention, a user terminal has a transmission section that is capable of transmitting a plurality of waveforms including a first waveform and a second waveform while switching therebetween, wherein the first waveform is based on a first transmission scheme and the second waveform is based on a second transmission scheme, and transmits the first waveform at a given timing, by using a given cell, and a control section that calculates a power headroom for the second waveform, which is one of the plurality of waveforms and which is not transmitted at the given timing. According to one aspect of the present invention, communication can be continued adequately even when communication is performed by using multiple waveforms.
    Type: Grant
    Filed: May 1, 2017
    Date of Patent: August 3, 2021
    Assignee: NTT DOCOMO, INC.
    Inventors: Ryosuke Osawa, Hiroki Harada, Yuichi Kakishima