Patents Assigned to NTT DoCoMo, Inc.
  • 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
  • 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: 20220312424
    Abstract: The present application provides a terminal and a base station. The terminal includes: a processing unit configured to use a neural network to map a bit sequence to be transmitted into a complex symbol sequence, wherein the neural network is configured to map the bit sequence into the complex symbol sequence within a predetermined range of a complex plane.
    Type: Application
    Filed: July 2, 2019
    Publication date: September 29, 2022
    Applicant: NTT DOCOMO, INC.
    Inventors: Neng Ye, Xiangming Li, Jianxiong Pan, Wenjia Liu, Xiaolin Hou
  • Publication number: 20220312274
    Abstract: A terminal includes a receiver that receives system information; and a processor that uses, when a channel bandwidth indicated by the system information received by the receiver is not supported, a maximum bandwidth of a bandwidth of an initial Bandwidth Part (BWP) and a supported maximum bandwidth.
    Type: Application
    Filed: February 25, 2020
    Publication date: September 29, 2022
    Applicant: NTT DOCOMO, INC.
    Inventors: Hideaki Takahashi, Yousuke Sano
  • 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: 20220309396
    Abstract: An inference device includes a survival period information input unit configured to acquire survival period information indicating a change in a value of a feature amount over a period of time from a plurality of observation subjects for each feature amount, a feature amount change model construction unit configured to construct a feature amount change model, an attribute learning information input unit configured to acquire attribute learning information, a feature amount change inference unit configured to derive a value of each feature amount for each period, an attribute inference model construction unit configured to construct an attribute inference model, and a model evaluation unit configured to derive accuracy of inference of each attribute inference model in each period.
    Type: Application
    Filed: June 3, 2020
    Publication date: September 29, 2022
    Applicant: NTT DOCOMO, INC.
    Inventors: Masato HASHIMOTO, Hisashi KURASAWA, Naoharu YAMADA
  • Publication number: 20220311452
    Abstract: A method for reducing feedback overhead associated with bitmap reporting may be implemented between a user equipment and a base station. The method includes activating a coding scheme for reporting a bitmap in association with a prefix coding scheme, encoding a plurality of bit groups using the prefix coding scheme, generating a plurality of codeword sets for the plurality of bit groups, and reporting the codeword sets generated.
    Type: Application
    Filed: June 10, 2019
    Publication date: September 29, 2022
    Applicant: NTT DOCOMO, INC.
    Inventors: Nadisanka Rupasinghe, Haralabos Papadopoulos
  • 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
  • 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: 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
  • Patent number: 11457418
    Abstract: A radio terminal that performs radio communication with a radio base station including a plurality of transmission points each including at least one antenna element and a signal processing unit connected to the plurality of transmission points includes a plurality of antenna elements, an estimating section that estimates path-loss between each of the plurality of antenna elements and the plurality of transmission points, and a calculating section that calculates a power control weight for controlling transmission power of the plurality of antenna elements based on the path-loss for the antenna element that has been estimated by the estimating section.
    Type: Grant
    Filed: February 7, 2018
    Date of Patent: September 27, 2022
    Assignee: NTT DOCOMO, INC.
    Inventors: Tatsuki Okuyama, Satoshi Suyama, Jun Mashino, Shohei Yoshioka, Yukihiko Okumura
  • 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: 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
  • Publication number: 20220303832
    Abstract: 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: Application
    Filed: May 27, 2020
    Publication date: September 22, 2022
    Applicant: NTT DOCOMO, INC.
    Inventors: Daiki Takeda, Yuichi Kakishima, Koji Hiratsuka, Hiroki Ishizuka, Akio Gouda, Masashi Anzawa, Kouta Oguni
  • 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
  • Publication number: 20220304048
    Abstract: A terminal including: a reception unit configured to receive, from a base station apparatus, information instructing not to perform a random access procedure even when an event that triggers the random access procedure occurs; and a control unit configured to determine not to perform the random access procedure when the event occurs based on the information.
    Type: Application
    Filed: August 14, 2019
    Publication date: September 22, 2022
    Applicant: NTT DOCOMO, INC.
    Inventors: Hideaki Takahashi, Kouhei Harada, Akihito Hanaki
  • Publication number: 20220301003
    Abstract: An area specifying system is a system for specifying an area in which information presented by an information medium is recognizable as the information, and includes a medium position information acquisition unit configured to acquire medium position information indicating a position in which the information medium is provided, an area specifying information acquisition unit configured to acquire area specifying information related to at least one of attributes of the information medium and content of the information presented by the information medium, and a specifying unit configured to specify the area based on the medium position information acquired by the medium position information acquisition unit and the area specifying information acquired by the area specifying information acquisition unit.
    Type: Application
    Filed: April 28, 2020
    Publication date: September 22, 2022
    Applicant: NTT DOCOMO, INC.
    Inventors: Tomohiro NAKAGAWA, Takuya DOUMEN, Kazuya SASAKI
  • Publication number: 20220304056
    Abstract: A terminal includes a receiving unit that receives a signal; a control unit that configures a frequency resource to be measured based on an information element indicating a center frequency or a measurement bandwidth, wherein the information element is included in the signal received by the receiving unit; and a transmitting unit that transmits a result of a Received Signal Strength Indicator (RSSI) measurement or a result of a channel occupancy measurement, wherein the RSSI measurement or the channel occupancy measurement is performed on the frequency resource to be measured that is configured by the control unit.
    Type: Application
    Filed: June 21, 2019
    Publication date: September 22, 2022
    Applicant: NTT DOCOMO, INC.
    Inventors: Hiroki Harada, Daisuke Murayama, Daisuke Kurita
  • Publication number: 20220303811
    Abstract: A user equipment includes a transmitting unit that transmits a measurement result of a secondary cell; a receiving unit that receives a signal to activate the secondary cell; and a control unit that uses previously obtained information of the secondary cell to activate the secondary cell when a predetermined condition associated with a power class of the user equipment is satisfied.
    Type: Application
    Filed: May 10, 2019
    Publication date: September 22, 2022
    Applicant: NTT DOCOMO, INC.
    Inventors: Yuichi Kakishima, Takuma Takada, Naoki Fujimura, Hiroki Harada