Patents by Inventor Satoshi Nagata

Satoshi Nagata 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: 11463225
    Abstract: To control UL transmission properly even when uplink data and demodulation reference signals are transmitted using short TTIs, a user terminal according to one aspect of the present invention has a transmission section that transmits a UL signal and a reference signal for use for demodulating the UL signal, and a control section that controls the allocation of the UL signal and the reference signal, and, when UL signals are allocated to a plurality of contiguous predetermined time intervals (sTTIs), respectively, the control section allocates the UL signal and the reference signal for use for demodulating the UL signal to the same sTTI, at least in an sTTI apart from the top sTTI.
    Type: Grant
    Filed: March 23, 2017
    Date of Patent: October 4, 2022
    Assignee: NTT DOCOMO, INC.
    Inventors: Kazuki Takeda, Satoshi Nagata, Lihui Wang, Xiaolin Hou, Huiling Jiang
  • Publication number: 20220312466
    Abstract: A terminal according to one aspect of the present disclosure includes a control section and a receiving section. The control section determines a set of transmission configuration indication states (TCI states) to be applied for a channel that is repeatedly transmitted, based on a field of downlink control information (DCI) for scheduling the channel. The receiving section receives the channel based on the set. According to one aspect of the present disclosure, repetition processing can be appropriately controlled.
    Type: Application
    Filed: June 13, 2019
    Publication date: September 29, 2022
    Applicant: NTT DOCOMO, INC.
    Inventors: Yuki Matsumura, Satoshi Nagata, Shaozhen Guo, Jing Wang, Xiaolin Hou
  • Publication number: 20220311577
    Abstract: A terminal according to one aspect of the present disclosure includes: a control section that, when a reference signal for radio link monitoring (RLM-RS) is not configured for the terminal, determines a reference signal of a transmission configuration indication (TCI) state associated with at least one transmission/reception point (TRP) as the RLM-RS; and a receiving section that receives the RLM-RS. According to one aspect of the present disclosure, link failure can be appropriately detected.
    Type: Application
    Filed: June 6, 2019
    Publication date: September 29, 2022
    Applicant: NTT DOCOMO, INC.
    Inventors: Yuki Matsumura, Satoshi Nagata, Jing Wang, Xiaolin Hou
  • Publication number: 20220312338
    Abstract: A terminal according to one aspect of the present disclosure includes: a control section that determines a power control parameter for a physical uplink shared channel (PUSCH), based on reception of a medium access control control element (MAC CE); and a transmitting section that transmits the PUSCH by using transmission power based on the power control parameter. According to one aspect of the present disclosure, a parameter for transmission power control can be appropriately determined.
    Type: Application
    Filed: June 13, 2019
    Publication date: September 29, 2022
    Applicant: NTT DOCOMO, INC.
    Inventors: Yuki Matsumura, Satoshi Nagata
  • Publication number: 20220312467
    Abstract: A terminal according to one aspect of the present disclosure includes a control section that, in a case that downlink control information (DCI) for scheduling a physical uplink shared channel (PUSCH) is a DCI format that does not contain indication of a spatial relation, determines one of a first reference signal and a second reference signal as a certain spatial relation, the first reference signal related to quasi-co-location (QCL) of certain downlink transmission or a spatial relation of certain uplink transmission, the second reference signal being indicated by information that is received; and a transmitting section that transmits the PUSCH in accordance with the certain spatial relation. According to one aspect of the present disclosure, UL transmission can be appropriately controlled.
    Type: Application
    Filed: August 26, 2019
    Publication date: September 29, 2022
    Applicant: NTT DOCOMO, INC.
    Inventors: Yuki Matsumura, Satoshi Nagata
  • Patent number: 11457493
    Abstract: In order to control communication operations properly in a secondary cell even when a beam failure and/or a BR failure occur in the secondary cell, a user terminal, according to one aspect of the present disclosure, has a control section that controls adjustment of a deactivation timer for a certain secondary cell and/or indication of a beam failure and/or a beam recovery (BR) failure in the certain secondary cell, based on the beam failure and/or a result of BR in the certain secondary cell, and a transmission section that transmits information about the beam failure and/or the BR failure in the certain secondary cell by using another cell.
    Type: Grant
    Filed: November 2, 2017
    Date of Patent: September 27, 2022
    Assignee: NTT DOCOMO, INC.
    Inventors: Hiroki Harada, Satoshi Nagata, Jing Wang, Liu Liu
  • Patent number: 11457419
    Abstract: The present invention is designed so that transmission power is controlled adequately even when communication is performed using a plurality of transmission time intervals (TTIs) of varying lengths. According to one aspect of the present invention, a user terminal has a transmission section that transmits signals using a plurality of transmission time intervals (TTIs) of varying lengths, and a control section that controls the transmission power of a first signal that is transmitted in a first TTI, and the transmission power of a second signal that is transmitted in a second TTI having a shorter TTI duration than the first TTI, and, when the total transmission power of the first signal and the second signal that are transmitted in an overlapping manner exceeds the maximum transmission power, the control section exerts control so that transmission power is preferentially allocated to one of the first signal and the second signal.
    Type: Grant
    Filed: January 12, 2018
    Date of Patent: September 27, 2022
    Assignee: NTT DOCOMO, INC.
    Inventors: Kazuki Takeda, Satoshi Nagata, Lihui Wang, Xiaolin Hou, Huiling Jiang
  • Patent number: 11457451
    Abstract: The present invention is designed to appropriately configure sequences that are applied to reference signals and/or uplink control channels and so on in future radio communication systems. One aspect of the user terminal of the present invention provides a transmitting section that transmits a demodulation reference signal and/or an uplink control channel, to which predetermined sequences are applied, in predetermined slots, and a control section that controls each predetermined sequence that is used in the predetermined slots based on whether or not frequency hopping is used in the predetermined slots.
    Type: Grant
    Filed: November 17, 2017
    Date of Patent: September 27, 2022
    Assignee: NTT DOCOMO, INC.
    Inventors: Yuki Matsumura, Kazuki Takeda, Satoshi Nagata
  • Patent number: 11456841
    Abstract: A terminal is disclosed including a receiver that receives configuration information for a downlink bandwidth part (DL BWP), the configuration information including a control resource set (CORESET) configuration and a search space configuration; and a processor that determines a CORESET related to a DL BWP based on the configuration information for the DL BWP, wherein, upon detection of a downlink control information in the CORESET, the receiver receives a physical downlink shared channel (PDSCH) in the DL BWP, based on the configuration information for the DL BWP. In other aspects, a radio communication method for a terminal is also disclosed.
    Type: Grant
    Filed: July 27, 2017
    Date of Patent: September 27, 2022
    Assignee: NTT DOCOMO, INC.
    Inventors: Kazuki Takeda, Satoshi Nagata, Lihui Wang
  • Patent number: 11456839
    Abstract: 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: Grant
    Filed: February 2, 2018
    Date of Patent: September 27, 2022
    Assignee: NTT DOCOMO, INC.
    Inventors: Yuichi Kakishima, Chongning Na, Kazuaki Takeda, Satoshi Nagata
  • Publication number: 20220304019
    Abstract: A terminal according to an aspect of the present disclosure includes a receiving section configured to receive information related to one or a plurality of frequency hopping modes, and a control section configured to determine, based on information related to the same frequency hopping mode or information related to different frequency hopping modes, a frequency hopping mode to be applied to each of a first uplink shared channel to which repetitive transmission in a first unit is applied and a second uplink shared channel to which repetitive transmission in a second unit shorter than the first unit is applied.
    Type: Application
    Filed: August 23, 2019
    Publication date: September 22, 2022
    Applicant: NTT DOCOMO, INC.
    Inventors: Yuki Takahashi, Satoshi Nagata, Lihui Wang
  • Patent number: 11451338
    Abstract: The present invention is designed to control retransmission properly in smaller units than TBs (for example, in units of CBs or in units of CBGs). According to one example of the present invention, a user terminal has a receiving section that receives a transport block (TB) including one or more codeblock groups (CBG), a transmission section that transmits retransmission control information that indicates an ACK or a NACK in response to each CBG, and a control section that, when at least one CBG in the TB is subject to retransmission, determines the number of bits of the retransmission control information based on the total number of CBGs in the TB or the number of CBGs that are retransmitted.
    Type: Grant
    Filed: April 5, 2017
    Date of Patent: September 20, 2022
    Assignee: NTT DOCOMO, INC.
    Inventors: Kazuki Takeda, Satoshi Nagata, Lihui Wang
  • Patent number: 11452099
    Abstract: A user terminal, according to the present invention, has a receiving section that receives resource information, which indicates a single or a plurality of uplink control channel resources, per configuration identifier related to channel state information (CSI) reporting, and a control section that selects an uplink control channel resource to use to transmit a plurality of CSIs, based on the resource information.
    Type: Grant
    Filed: February 14, 2018
    Date of Patent: September 20, 2022
    Assignee: NTT DOCOMO, INC.
    Inventors: Kazuki Takeda, Satoshi Nagata, Huiling Li, Lihui Wang, Chongning Na, Xiaolin Hou
  • Publication number: 20220295472
    Abstract: A user terminal according to an aspect of the present disclosure includes a receiving section that receives control information for transmission of an uplink signal in a certain band, and a control section that performs control to allocate, to a plurality of sets of frequency resources less than 1 resource block included in the certain band, corresponding parts of the uplink signal that correspond to the plurality of sets, and simultaneously transmit the corresponding parts of the uplink signal. According to an aspect of the present disclosure, it is possible to appropriately control full power transmission.
    Type: Application
    Filed: May 2, 2019
    Publication date: September 15, 2022
    Applicant: NTT DOCOMO, INC.
    Inventors: Yuki Matsumura, Masaya Okamura, Hiroki Harada, Satoshi Nagata
  • Publication number: 20220295302
    Abstract: An aspect of a terminal of the present disclosure includes: a control section that controls detection of a beam failure; and a transmitting section that transmits information related to a cell in which the beam failure is detected and a new candidate beam, by using a MAC control element. A format of the MAC control element includes at least a first field indicating presence or absence of detection of the beam failure for each cell and a second field indicating information related to a new candidate beam for a cell in which the beam failure is detected.
    Type: Application
    Filed: August 15, 2019
    Publication date: September 15, 2022
    Applicant: NTT DOCOMO, INC.
    Inventors: Yuki Matsumura, Satoshi Nagata, Jing Wang, Xiaolin Hou
  • Publication number: 20220295418
    Abstract: A terminal according to an aspect of the present disclosure includes a receiving section that receives a reference signal for pathloss reference from one of a first point that transmits downlink data and a second point that transmits no downlink data, and a control section that controls transmission power for a sounding reference signal (SRS) to the second point based on the reference signal for pathloss reference. According to an aspect of the present disclosure, a parameter for transmission power control can be appropriately determined.
    Type: Application
    Filed: August 23, 2019
    Publication date: September 15, 2022
    Applicant: NTT DOCOMO, INC.
    Inventors: Masaya Okamura, Yuki Matsumura, Satoshi Nagata
  • Publication number: 20220295516
    Abstract: A terminal according to one aspect of the present disclosure includes a receiving section that receives a Physical Downlink Control Channel (PDCCH) configuration with a maximum number of control resource sets (CORESETs) exceeding 3, and a control section that assumes that a transmission configuration indication state (TCI state) for a PDCCH with respect to the CORESETs is designated on the basis of a Medium Access Control Control Element (MAC CE). According to one aspect of the present disclosure, it is possible to perform DL communication preferably even when multiple panels/TRPs are used.
    Type: Application
    Filed: August 15, 2019
    Publication date: September 15, 2022
    Applicant: NTT DOCOMO, INC.
    Inventors: Yuki Matsumura, Satoshi Nagata, Shaozhen Guo, Jing Wang, Xiaolin Hou
  • Publication number: 20220294512
    Abstract: One aspect of a terminal in the present disclosure includes a receiving section that receives downlink control information that uses at least one of a specific RNTI (Radio Network Temporary Identifier) and a specific field; and a control section that, when a beam failure is detected, controls transmission of information related to at least one of a cell in which the beam failure is detected and a new candidate beam by using at least one of an uplink shared channel scheduled in the downlink control information and a configured grant based uplink shared channel configured after receiving the downlink control information.
    Type: Application
    Filed: August 15, 2019
    Publication date: September 15, 2022
    Applicant: NTT DOCOMO, INC.
    Inventors: Yuki Matsumura, Satoshi Nagata, Jing Wang, Shaozhen Guo, Xiaolin Hou
  • Publication number: 20220295519
    Abstract: An aspect of a terminal according to the present disclosure includes: a receiving section that receives information for indicating transmission of an uplink shared channel; and a control section that controls, when dividing the uplink shared channel into a plurality of segments and transmitting the segments, to apply, to at least one segment, at least one of a different redundancy version from a redundancy version that is configured for the uplink shared channel and a value different from a parameter value relating to an overhead that is configured for the uplink shared channel.
    Type: Application
    Filed: July 10, 2019
    Publication date: September 15, 2022
    Applicant: NTT DOCOMO, INC.
    Inventors: Yuki Takahashi, Shohei Yoshioka, Satoshi Nagata, Lihui Wang
  • Publication number: 20220295537
    Abstract: A terminal according to an aspect of the present disclosure includes a control section that determines a parameter related to an initial value for generating a scrambling sequence applied to a specific uplink shared channel (Physical Uplink Shared Channel (PUSCH)) based on whether already having a valid cell radio network temporary identifier (C-RNTI), and a transmitting section that transmits, on the specific PUSCH, bits to which scrambling based on the parameter is applied. According to an aspect of the present disclosure, scrambling can be appropriately performed for the PUSCH.
    Type: Application
    Filed: August 15, 2019
    Publication date: September 15, 2022
    Applicant: NTT DOCOMO, INC.
    Inventors: Yuki Matsumura, Satoshi Nagata, Lihui Wang, Xiaolin Hou