Patents Assigned to NTT DoCoMo, Inc.
  • Patent number: 11902069
    Abstract: 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: Grant
    Filed: August 2, 2019
    Date of Patent: February 13, 2024
    Assignee: NTT DOCOMO, INC.
    Inventors: Yuki Matsumura, Yuichi Kakishima, Satoshi Nagata
  • Publication number: 20240049191
    Abstract: A terminal comprises: a reception unit that receives a first control information by a first control channel on a first carrier and a second control information by a second control channel on a second carrier; and a control unit that controls a reception of the second control channel based on the first control information, and controls a communication of data based on the second control information.
    Type: Application
    Filed: December 25, 2020
    Publication date: February 8, 2024
    Applicant: NTT DOCOMO, INC.
    Inventors: Yuki Takahashi, Shohei Yoshioka, Masaya Okamura, Shinya Kumagai, Satoshi Nagata
  • Publication number: 20240048289
    Abstract: A terminal according to an aspect of the present disclosure includes: a control section that determines a size of a semi-static hybrid automatic repeat request acknowledgement (HARQ-ACK) codebook including HARQ-ACK corresponding to a downlink shared channel (physical downlink shared channel (PDSCH)) of semi-persistent scheduling (SPS) based on the number of configured SPS configurations, the number of configured or activated cells, and the number of HARQ-ACK timing values included in a set of the configured HARQ-ACK timing values; and a transmitting section that transmits an HARQ-ACK information bit corresponding to the HARQ-ACK codebook by using a resource of an uplink control channel. According to one aspect of the present disclosure, the HARQ-ACK can be appropriately feed back even in a case where multiple SPSs are used.
    Type: Application
    Filed: October 3, 2019
    Publication date: February 8, 2024
    Applicant: NTT DOCOMO, INC.
    Inventors: Yuki Takahashi, Satoshi Nagata, Xiaohong Zhang, Shaozhen Guo, Lihui Wang, Xiaolin Hou
  • Publication number: 20240048127
    Abstract: An analysis device includes: an estimation unit that obtains a current state variable by state estimation based on a state variable for first sequence data generated by applying a first conversion to observation data, a state space model, and each element included in the first sequence data; an observation unit that generates second sequence data by applying an observation process to the current state variable; an elaboration unit that generates third sequence data by performing an elaboration process of correcting each element included in the second sequence data so that a value of each cell of the estimated observation data does not become a negative value and the number of cells having a value other than 0 included in the estimated observation data is suppressed; and a second conversion unit that generates the estimated observation data by applying a second conversion to the third sequence data.
    Type: Application
    Filed: March 24, 2021
    Publication date: February 8, 2024
    Applicant: NTT DOCOMO, INC.
    Inventors: Hiroto AKATSUKA, Masayuki TERADA
  • Publication number: 20240049195
    Abstract: A terminal includes: a reception unit configured to receive a block including a synchronization signal and a broadcast channel, a control channel carrying control information, and a shared channel carrying system information by applying single beamforming; and a control unit configured to perform an initial access, based on the system information. The block and one or both of the control channel and the shared channel are frequency-multiplexed, and the control channel and the shared channel are time-multiplexed.
    Type: Application
    Filed: January 5, 2021
    Publication date: February 8, 2024
    Applicant: NTT DOCOMO, INC.
    Inventors: Naoya Shibaike, Mayuko Okano, Hiroki Harada, Jing Wang, Qiping PI
  • Publication number: 20240048190
    Abstract: The present disclosure provides a terminal and a base station in a communication system. The terminal includes: a receiving unit configured to receive, from a base station, first information indicating a first parameter, where the first parameter indicates a number of candidate transform domain vectors regarding a subcarrier-level precoding matrix, and a value of the first parameter is smaller than a number of subcarriers of the communication system; the receiving unit being further configured to receive, from the base station, second information indicating a second parameter, where the second parameter indicates a number of transform domain vectors used to determine the subcarrier-level precoding matrix; and a control unit configured to determine, from the number of candidate transform domain vectors indicated by the first information, the number of transform domain vectors indicated by the second information.
    Type: Application
    Filed: December 29, 2020
    Publication date: February 8, 2024
    Applicant: NTT DOCOMO, INC.
    Inventors: Wenjia Liu, Xiaolin Hou, Xin Wang, Yuki Matsumura, Nadisanka Rupasinghe
  • Publication number: 20240048964
    Abstract: A base station is disclosed that includes a transmitting and receiving circuit that transmits an RLM reference signal (RLM-RS) to a terminal. In Frequency Range 1 (FR1), when the RLM-RS is a synchronization signal block (SSB) and the terminal does not have a capability of simultaneous transmission or reception of data and an SSB with different numerologies, the transmitting and receiving circuit does not transmit or receive data on symbols of the RLM-RS, the data being with a different subcarrier spacing (SCS) than an SCS of the RLM-RS. In Frequency Range 2 (FR2), if the RLM-RS is a quasi-co-located reference signal with active transmission configuration indicator state (TCI-state), then the transmitting and receiving circuit can transmit or receive data on symbols of the RLM-RS. In other aspects, a radio communication method and a system are also disclosed.
    Type: Application
    Filed: October 11, 2023
    Publication date: February 8, 2024
    Applicant: NTT DOCOMO, INC.
    Inventor: Hiroki Harada
  • Patent number: 11895576
    Abstract: An NSSF (69) includes: a selection unit selecting a slice corresponding to a service related to a request from a terminal (10) and a target processing server corresponding to the slice based on slice correspondence information including information where a slice, a processing server corresponding to the slice, and a service used by a terminal are associated with one another; and a notification unit notifying an AMF (30) of selection result including information regarding the slice and target processing server. The AMF includes: a determination processing unit determining whether the AMF is a target processing server based on information on the target processing server in the selection result information, and performing processing for a service when the AMF is the target processing server, or transferring a request for processing for a service to the target processing server when the AMF is not the target processing server.
    Type: Grant
    Filed: April 27, 2018
    Date of Patent: February 6, 2024
    Assignee: NTT DOCOMO, INC.
    Inventors: Takuya Shimojou, Atsushi Minokuchi, Ashiq Khan, Srisakul Thakolsri, Malla Reddy Sama, Joan Triay Marques, Irfan Ali
  • Patent number: 11895523
    Abstract: A user apparatus includes a communication unit configured to communicate with a first base station apparatus and a second base station apparatus, wherein the first base station apparatus is a master node in a New Radio (NR) radio communication system and the second base station apparatus is a secondary node in the NR radio communication system; a reception unit configured to receive from the first base station apparatus an instruction to measure a system frame number and frame timing difference (SFTD) representing a system frame number and frame timing difference between cells; a control unit configured to measure SFTD between a cell of the first base station apparatus and a cell of the second base station apparatus based on the instruction to measure SFTD; and a transmission unit configured to transmit to the first base station apparatus a measurement result including the measured SFTD.
    Type: Grant
    Filed: February 8, 2019
    Date of Patent: February 6, 2024
    Assignee: NTT DOCOMO, INC.
    Inventors: Hideaki Takahashi, Tianyang Min, Tooru Uchino
  • Patent number: 11891176
    Abstract: Recovery of a flying vehicle that has fallen to the ground is facilitated. A positioning unit measures a position of the flying vehicle during flight. A specification unit specifies a feature of a region on the ground corresponding to the measured position. A determination unit determines a sending interval of position information indicating the position of the flying vehicle, according to the specified feature. A sending unit sends the position information at the determined sending interval.
    Type: Grant
    Filed: May 8, 2019
    Date of Patent: February 6, 2024
    Assignee: NTT DOCOMO, INC.
    Inventors: Naoki Kameyama, Tomoe Ushiro, Youhei Oono, Yuichiro Segawa
  • Patent number: 11895622
    Abstract: A user apparatus in a mobile communication system includes an allocation means that divides a message that includes control information and data into a plurality of partial messages, and allocates resources included in one or more resource pools to the plurality of partial messages; and a transmission means that transmits the plurality of partial messages using the resources allocated by the allocation means.
    Type: Grant
    Filed: July 22, 2020
    Date of Patent: February 6, 2024
    Assignee: NTT DOCOMO, INC.
    Inventors: Shimpei Yasukawa, Satoshi Nagata, Qun Zhao, Yongbo Zeng, Yongsheng Zhang
  • Patent number: 11895656
    Abstract: The present invention is designed so that, even when a sequence-based uplink control channel is used, uplink control information is reported appropriately. A user terminal according to one aspect of the present invention has a control section that determines to use one or both of a short uplink control channel, which is transmitted in a short period, and a long uplink control channel, which is transmitted in a longer period than the short uplink control channel, based on certain information, and a transmission section that transmits the uplink control information using the determined uplink control channel.
    Type: Grant
    Filed: February 23, 2018
    Date of Patent: February 6, 2024
    Assignee: NTT DOCOMO, INC.
    Inventors: Yuki Matsumura, Kazuki Takeda, Satoshi Nagata
  • Patent number: 11894925
    Abstract: An embodiment of present disclosure provides a method of transmitting channel state information reference signals, and a base station. An embodiment of the present disclosure provides a method of transmitting channel state information reference signals (CSI-RSs), which is executed by a base station, and this method includes the steps of determining whether or not it is necessary to use aperiodic CSI-RSs in a communication system in which a base station to use periodic CSI-RSs is provided, generating an aperiodic CSI-RS trigger signal and communicating the aperiodic CSI-RS trigger signal to a mobile station when aperiodic CSI-RSs need to be used, and communicating aperiodic CSI-RSs to the mobile station in accordance with the aperiodic CSI-RS trigger signal.
    Type: Grant
    Filed: February 28, 2017
    Date of Patent: February 6, 2024
    Assignee: NTT DOCOMO, INC.
    Inventors: Chongning Na, Huiling Jiang, Yuichi Kakishima, Satoshi Nagata
  • Patent number: 11895559
    Abstract: An object is to provide a moving route determination device that makes it possible to accurately determine a user's moving route. A server device 100 includes a geofence evaluation unit 105 configured to store a scoring table for determining a moving route of a user terminal 200, a check-in log acquisition unit 103 configured to acquire at least one of a check-in log which is a history of position management information, such as check-in information, settlement information, or search information, indicating that the user terminal 200 is located in a predetermined range, a settlement log, and a search log as a position management log, and a scoring determination unit 106 configured to determine a moving route of the user terminal 200 on the basis of the position management log and determination information stored in the geofence evaluation unit 105 in a case where a moving means is not able to be determined from at least one of the check-in log, the settlement log, and the search log.
    Type: Grant
    Filed: July 23, 2019
    Date of Patent: February 6, 2024
    Assignee: NTT DOCOMO, INC.
    Inventors: Tomohiro Nakagawa, Takuya Doumen, Chao Xue
  • Patent number: 11895657
    Abstract: A user terminal according to the present invention includes: a transmitting section that transmits Uplink Control Information (UCI) including at least one of retransmission control information for a downlink data channel, a Scheduling Request (SR) and Channel State Information (CSI); and a control section that controls the transmission of the UCI when a first uplink control channel and a second uplink control channel having a longer duration than that of the first uplink control channel are subjected to time division multiplexing in one or more slots.
    Type: Grant
    Filed: October 23, 2017
    Date of Patent: February 6, 2024
    Assignee: NTT DOCOMO, INC.
    Inventors: Kazuki Takeda, Satoshi Nagata, Lihui Wang, Xiaolin Hou
  • Publication number: 20240039604
    Abstract: The present disclosure provides a method for precoding matrix indicator (PMI) transmission and a method for determining precoding granularity performed by a terminal, and a corresponding terminal and base station. The terminal includes: a receiving unit configured to receive first information about the precoding matrix indicator (PMI) from a base station of the communication system; and a control unit configured to determine whether to transmit second information about the precoding matrix indicator according to the first information, wherein the precoding matrix indicator is for a subcarrier-level precoding matrix.
    Type: Application
    Filed: December 29, 2020
    Publication date: February 1, 2024
    Applicant: NTT DOCOMO, INC.
    Inventors: Wenjia Liu, Xiaolin Hou, Xin Wang, Yuki Matsumura, Nadisanka Rupasinghe
  • Publication number: 20240040585
    Abstract: A terminal has a first receiver that receives a first control signal and a second receiver that receives a second control signal or data. The first receiver receives a first control signal that includes at least either information, instruction or control relating to the second control signal or data received by the second receiver.
    Type: Application
    Filed: December 11, 2020
    Publication date: February 1, 2024
    Applicant: NTT DOCOMO, INC.
    Inventors: Yuki Matsumura, Hiroki Harada, Satoshi Nagata
  • Publication number: 20240040486
    Abstract: A terminal has: a transmitting unit configured to transmit, to a communication device, a requesting signal that requests transmission of a cell search signal; and a receiving unit configured to receive the cell search signal transmitted based on the requesting signal and identify information related to a cell.
    Type: Application
    Filed: March 24, 2021
    Publication date: February 1, 2024
    Applicant: NTT DOCOMO, INC.
    Inventors: Shinya Kumagai, Mayuko Okano, Masaya Okamura, Yuki Takahashi, Shohei Yoshioka, Satoshi Nagata
  • Publication number: 20240040520
    Abstract: A terminal according to one aspect of the present disclosure includes a receiving section that receives a higher layer parameter corresponding to a report related to maximum permitted exposure (MPE) specific to a beam, and a control section that controls transmission of the report using a medium access control (MAC) control element (CE), based on the higher layer parameter. According to one aspect of the present disclosure, the report related to MPE can be appropriately performed.
    Type: Application
    Filed: December 11, 2020
    Publication date: February 1, 2024
    Applicant: NTT DOCOMO, INC.
    Inventors: Yuki Matsumura, Satoshi Nagata, Jing Wang, Lan Chen
  • Publication number: 20240040502
    Abstract: A terminal includes a reception unit configured to receive control information from another terminal in a resource pool; a control unit configured to control an operation related to DRX (Discontinuous reception) and autonomously select a resource based on the control information and a state related to the DRX in the resource pool; and a transmission unit configured to perform transmission to the other terminal using the selected resource.
    Type: Application
    Filed: January 18, 2021
    Publication date: February 1, 2024
    Applicant: NTT DOCOMO, INC.
    Inventors: Shohei Yoshioka, Satoshi Nagata