Patents Assigned to NTT Docomo
  • TERMINAL, RADIO COMMUNICATION METHOD, AND BASE STATION
    Publication number: 20250119256
    Abstract: A terminal according to one aspect of the present disclosure includes a receiving section that receives downlink control information including a resource assignment of a physical uplink shared channel and a value of an antenna port indication, and a control section that controls transmission of a demodulation reference signal (DMRS), based on an association between the value, the number of code division multiplexing (CDM) groups, and a DMRS port. The number of the CDM groups for DMRS configuration type 1 is larger than 2, and the number of the CDM groups for DMRS configuration type 2 is larger than 3. According to one aspect of the present disclosure, an appropriate number of DMRS ports can be used.
    Type: Application
    Filed: February 10, 2022
    Publication date: April 10, 2025
    Applicant: NTT DOCOMO, INC.
    Inventors: Yuki Matsumura, Satoshi Nagata, Jing Wang, Lan Chen
  • Terminal, communication method, and radio communication system
    Patent number: 12273173
    Abstract: A terminal is disclosed including a processor and a transmitter. The processor includes, in a UECapabilityInformation message, information indicating whether transmission diversity is supported on a per-band basis. The transmitter transmits, to a base station, the UECapabilityInformation message including the information indicating whether transmission diversity is supported on the per-band basis. In other aspects, a communication method and a radio communication system are also disclosed.
    Type: Grant
    Filed: January 25, 2024
    Date of Patent: April 8, 2025
    Assignee: NTT DOCOMO, INC.
    Inventors: Hiromasa Umeda, Hideaki Takahashi, Yuta Oguma
  • User equipment and communication method
    Patent number: 12273755
    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: Grant
    Filed: May 10, 2019
    Date of Patent: April 8, 2025
    Assignee: NTT DOCOMO, INC.
    Inventors: Yuichi Kakishima, Takuma Takada, Naoki Fujimura, Hiroki Harada
  • Terminal and radio communication method
    Patent number: 12273749
    Abstract: A terminal includes a receiving section that receives cell-specific or terminal-specific configuration information related to a physical downlink control channel, and a control section that controls, on the basis of the configuration information, a configuration of a search space set to monitor a physical downlink control channel to schedule a physical downlink shared channel associated with a multicast traffic channel. Therefore, it is possible to appropriately control monitoring of a physical downlink control channel to schedule a physical downlink shared channel to transfer multicast data.
    Type: Grant
    Filed: June 21, 2019
    Date of Patent: April 8, 2025
    Assignee: NTT DOCOMO, INC.
    Inventors: Shohei Yoshioka, Satoshi Nagata, Lihui Wang, Xiaolin Hou
  • User terminal, radio base station and radio communication method
    Patent number: 12273922
    Abstract: To actualize proper UL communication in a communication system using a cell where application of listening is defined, a user terminal has a reception section that receives a DL signal including a UL transmission indication, and a control section that controls transmission of UL data based on the UL transmission indication and a channel access procedure before UL transmission, where the control section controls so as to perform a channel access procedure with random back-off.
    Type: Grant
    Filed: March 31, 2017
    Date of Patent: April 8, 2025
    Assignee: NTT DOCOMO, INC.
    Inventors: Hiroki Harada, Satoshi Nagata, Lihui Wang, Liu Liu, Huiling Jiang
  • Methods of extending type II port selection codebook for supporting higher rank transmission
    Patent number: 12273160
    Abstract: A terminal for performing Channel State Information (CSI) reporting for type II port selection codebook includes a receiver that receives beamformed CSI reference signal (RS) ports comprising spatial domain (SD) beams and frequency domain (FD) base. In addition, the terminal includes a processor that, using higher layer signaling, configures a number of SD beam selection and a number of FD base selection, and selects a first value from a first set of values for the number of SD beam selection and a second value from a second set of values for the number of FD base section. The terminal further includes a transmitter that transmits the first value and the second values.
    Type: Grant
    Filed: December 16, 2021
    Date of Patent: April 8, 2025
    Assignee: NTT DOCOMO, INC.
    Inventors: Nadisanka Rupasinghe, Yuki Matsumura
  • Terminal, radio communication method, and base station
    Patent number: 12273158
    Abstract: A terminal according to one aspect of the present disclosure includes: a control section that determines a quasi-co-located (QCL) parameter for downlink, when spatial relation information and path-loss reference signal information for uplink transmission are not provided and default spatial relation and path-loss reference signal enabling information for the uplink transmission is provided, in a case where a plurality of different TCI states mapped to a transmission configuration indication (TCI) code point are not provided; and a transmitting section that transmits the uplink transmission by using the QCL parameter. According to one aspect of the present disclosure, a spatial relation can be appropriately determined.
    Type: Grant
    Filed: April 15, 2020
    Date of Patent: April 8, 2025
    Assignee: NTT DOCOMO, INC.
    Inventors: Yuki Matsumura, Satoshi Nagata
  • Session management apparatus, user plane apparatus, and access mobile management apparatus
    Patent number: 12273836
    Abstract: A session management apparatus including: a reception unit configured to receive, from a user plane apparatus, time comparison information between a TSN time of a TSN time domain and a 5G time, and identification information of the TSN time domain; and a transmission unit configured to transmit, to a base station apparatus, TSN assistance information determined based on the time comparison information and identification information of a TSN stream for each of one or more TSN streams that belong to the TSN time domain.
    Type: Grant
    Filed: September 27, 2019
    Date of Patent: April 8, 2025
    Assignee: NTT DOCOMO, INC.
    Inventors: Atsushi Minokuchi, Jari Mutikainen
  • OPTICAL COMMUNICATION SYSTEM, AGGREGATE STATION AND COMMUNICATION METHOD
    Publication number: 20250112700
    Abstract: Provided is an optical communication system having an aggregate station at a head and a plurality of extension stations connected in series. The aggregate station outputs a downlink optical signal generated by performing electrical-to-optical (E/O) conversion for a radio signal to the plurality of extension stations and acquires radio signals by performing optical-to-electrical (O/E) conversion for uplink optical signals input from the plurality of extension stations. Each extension station transmits a radio signal obtained by performing O/E conversion for the downlink optical signal received from the aggregate station and transmits an uplink optical signal generated by performing E/O conversion for a received radio signal to the aggregate station. Wavelengths of the uplink optical signal and the downlink optical signal allocated to the plurality of extension stations are the same.
    Type: Application
    Filed: February 3, 2022
    Publication date: April 3, 2025
    Applicants: NIPPON TELEGRAPH AND TELEPHONE CORPORATION, NTT DOCOMO, INC.
    Inventors: Kota ITO, Yuta TAKAHASHI, Mizuki SUGA, Takuto ARAI, Yushi SHIRATO, Daisei UCHIDA, Hideki TOSHINAGA, Naoki KITA, Yoshihisa KISHIYAMA, Satoshi SUYAMA
  • TERMINAL AND COMMUNICATION METHOD
    Publication number: 20250113379
    Abstract: A terminal includes: a reception unit configured to receive information related to a channel access procedure from a base station; a control unit configured to determine the channel access procedure, based on the information; and a communication unit configured to perform transmission to the base station, based on the determined channel access procedure, wherein the control unit supports a channel access procedure with LBT (Listen before talk), and does not assume that the LBT is to be configured in a licensed band.
    Type: Application
    Filed: December 27, 2022
    Publication date: April 3, 2025
    Applicant: NTT DOCOMO, INC.
    Inventors: Naoya Shibaike, Hiroki Harada, Satoshi Nagata, Qiping Pi
  • TERMINAL, RADIO COMMUNICATION METHOD, AND BASE STATION
    Publication number: 20250112747
    Abstract: A terminal according to one aspect of the present disclosure includes: a receiving section that receives a reference signal (RS); and a control section that, when a single frequency network (SFN) scheme is configured and at least one of a radio link failure (radio link monitoring (RLM))-RS and a beam failure detection (BFD)-RS is not configured, selects the RS corresponding to a control resource set (CORESET) determined based on a specific rule as at least one of the RLM-RS and the BFD-RS. According to one aspect of the present disclosure, at least one of RLM and BFD can be appropriately performed.
    Type: Application
    Filed: February 10, 2022
    Publication date: April 3, 2025
    Applicant: NTT DOCOMO, INC.
    Inventors: Yuki Matsumura, Satoshi Nagata
  • RETURN AREA PREDICTION DEVICE
    Publication number: 20250111393
    Abstract: A return area prediction device (10) includes a prediction unit (12) that acquires a regression result of prediction of a number of visitors in each return area for a target event from event information of the target event using a regularized regression method, specifies, based on the acquired regression result, a nearest-neighbor cluster closest to the regression result among event group clusters previously clustered, and predicts the number of visitors in each return area for the target event based on at least a position of a center of gravity of the nearest-neighbor cluster.
    Type: Application
    Filed: February 8, 2023
    Publication date: April 3, 2025
    Applicant: NTT DOCOMO, INC.
    Inventors: Yusuke NAKAMURA, Takashi SUZUKI, Akira YAMADA
  • Terminal and radio communication method
    Patent number: 12267694
    Abstract: A terminal according to one aspect of the present disclosure includes a receiving section that receives a plurality of pieces of configuration information indicating a plurality of control resource sets, and a control section that, when the plurality of pieces of configuration information do not include a control resource set pool index for one or more control resource sets of the plurality of control resource sets, determines a value of the control resource set pool index for the one or more control resource sets. According to one aspect of the present disclosure, it is possible to appropriately determine an operation for multiple panels/TRPs.
    Type: Grant
    Filed: November 15, 2019
    Date of Patent: April 1, 2025
    Assignee: NTT DOCOMO, INC.
    Inventors: Yuki Matsumura, Satoshi Nagata, Shaozhen Guo
  • Terminal, radio communication method, base station, and system
    Patent number: 12267134
    Abstract: A terminal, as disclosed, includes: a processor that, for a plurality of physical downlink shared channels (PDSCHs) transmitted from a plurality of transmission reception points (TRPs), respectively, controls transmission of capability information for indicating a first maximum number regarding a number of layers per PDSCH and a second maximum number regarding a total number of layers of the plurality of PDSCHS; and a receiver that receives the plurality of PDSCHs. The processor controls reporting of a single channel state information (CSI) for the plurality of TRPs, the single CSI indicating a first rank and a second rank that are determined according to a set of ranks based on higher layer signaling. In other aspects, a radio communication method, a base station, and a system are also disclosed.
    Type: Grant
    Filed: June 14, 2024
    Date of Patent: April 1, 2025
    Assignee: NTT DOCOMO, INC.
    Inventors: Yuki Matsumura, Satoshi Nagata, Jing Wang, Shaozhen Guo, Xiaolin Hou
  • Terminal, radio communication method, and system
    Patent number: 12267156
    Abstract: A terminal is disclosed including a processor that determines, when retransmission of a side channel in a communication between a plurality of terminals is performed, a modulation order for the retransmission of the side channel by using a MCS table based on side control information; a transmitter that transmits the side channel based on the determined modulation order, and a receiver that receives downlink control information including at least a UL-SCH indicator field, wherein the processor, if retransmission of an uplink shared channel is performed, determines a time density of a phase tracking reference signal (PTRS) based on whether a modulation and coding scheme (MCS) index is larger than a certain value, and wherein the transmitter transmits the PTRS. In other aspects, a radio communication method, and a system are also disclosed.
    Type: Grant
    Filed: February 16, 2023
    Date of Patent: April 1, 2025
    Assignee: NTT DOCOMO, INC.
    Inventors: Yuki Matsumura, Shohei Yoshioka, Satoshi Nagata
  • POWER CONTROL DEVICE
    Publication number: 20250105633
    Abstract: The purpose is to perform control so that a sufficient amount of stored power is secured when a DR request signal is received. A HEMS 100 is a power control device, which is a power control device that controls a storage battery 400 for supplying power to a communication device 500 that is a load device. In the HEMS 100, a DR activation prediction unit 103 predicts the activation of a demand response. A charge/discharge determination unit 108, which is a control unit, performs discharge control on the storage battery 400 based on this activation prediction. The charge/discharge determination unit 108 changes the discharge timing of the storage battery 400 depending on whether or not the activation of a demand response is predicted.
    Type: Application
    Filed: February 20, 2023
    Publication date: March 27, 2025
    Applicant: NTT DOCOMO, INC.
    Inventors: Masaki NAKAMURA, Yuta TOYAMA, Kazuhiko TAKENO
  • USER STATE DETERMINATION DEVICE
    Publication number: 20250106591
    Abstract: A user state determination device that can simply determine a location at which a user has fallen into a user state in which the user has lost an article or the like is provided. The user state determination device 100 includes: a user information acquiring unit 101 configured to acquire moving history information of a user; and a state determining unit 102 configured to determine that one spot (one location) serving as a start point of a predetermined moving pattern is likely to be a specific spot (a specific location) at which the user has fallen into a predetermined state (a state in which the user has lost an article) when the moving history information indicates the moving pattern. The predetermined state of a user refers to a state in which an article has been lost and is a state in which the user needs to perform a non-purposeful visit to the one spot (a visit to retrieve the lost article).
    Type: Application
    Filed: February 24, 2023
    Publication date: March 27, 2025
    Applicant: NTT DOCOMO, INC.
    Inventors: Shu ISHIKAWA, Shin ISHIGURO, Tomohiro MIMURA, Ryou KOYAMA, Akira YAMADA, Takashi SUZUKI
  • TERMINAL, BASE STATION AND COMMUNICATION METHOD
    Publication number: 20250105964
    Abstract: A terminal includes: a reception unit configured to receive, in downlink, a reference signal for positioning without using a measurement gap during a reference signal processing period; and a control unit configured to assume that the reference signal is to be transmitted by using a duplex method during the reference signal processing period.
    Type: Application
    Filed: February 4, 2022
    Publication date: March 27, 2025
    Applicant: NTT DOCOMO, INC.
    Inventors: Kousuke Shima, Hiroki Harada, Daisuke Kurita, Mayuki Okano, Masaya Okamura, Tomoya Ohara
  • WIRELESS RELAY DEVICE AND COMMUNICATION METHOD
    Publication number: 20250106665
    Abstract: A wireless relay device includes: a relay unit configured to relay a first wireless signal from a base station to a terminal; and a control unit configured to control relaying of the first wireless signal from the base station to the terminal. The control unit performs measurement of the first wireless signal and determines power amplification and a spatial domain filter to be applied to the relaying of the first wireless signal from the base station to the terminal based on a result of the measurement.
    Type: Application
    Filed: January 28, 2022
    Publication date: March 27, 2025
    Applicant: NTT DOCOMO, INC.
    Inventors: Hiroki Harada, Daisuke Kurita, Mayuko Okano, Kousuke Shima, Masaya Okamura, Tomoya Ohara, Jing Wang, Weiqi Sun
  • TERMINAL, RADIO COMMUNICATION METHOD, AND BASE STATION
    Publication number: 20250106080
    Abstract: A terminal according to one aspect of the present disclosure includes: a receiving section that receives a reference signal associated with a second physical cell ID (PCI) different from a first physical cell ID (PCI) corresponding to a serving cell; and a control section that controls, by using the reference signal, at least one of radio link monitoring (RLM), beam failure detection (BFD), and beam failure recovery (BFR). According to one aspect of the present disclosure, an RS to be used for at least one of the RLM, BFD, and BFR can be appropriately determined.
    Type: Application
    Filed: July 29, 2021
    Publication date: March 27, 2025
    Applicant: NTT DOCOMO, INC.
    Inventors: Yuki Matsumura, Satoshi Nagata, Jing Wang, Lan Chen