Patents Assigned to NTT DoCoMo, Inc.
  • Patent number: 11076310
    Abstract: The present invention is designed to adequately perform communication in accordance with measurement operation even when beam forming is applied. A user terminal according to the present invention has a receiving section that receives a DL measurement transmitted from one or a plurality of antenna ports, a measurement section that performs cell level measurement and/or beam level measurement using the DL measurement signal, and a control section that controls reporting of the measurement result of cell level measurement and/or beam level measurement, wherein the control section controls random access using resources configured in accordance with a reporting target of the measurement result.
    Type: Grant
    Filed: January 5, 2018
    Date of Patent: July 27, 2021
    Assignee: NTT DOCOMO, INC.
    Inventors: Hiroki Harada, Satoshi Nagata, Jing Wang, Liu Liu, Huiling Jiang
  • Patent number: 11073694
    Abstract: A see-through image display system having a laser-beam-scanner has a very small eyebox when a laser beam is directly projected into eye. This invention provides a solution to increase the size of eyebox using a free-form-mirror to create a real image with high NA without exit-pupil-expander.
    Type: Grant
    Filed: December 15, 2017
    Date of Patent: July 27, 2021
    Assignees: NTT DOCOMO, Inc.
    Inventors: Fusao Ishii, Mikiko Nakanishi, Kazuhiko Takahashi, Yuji Abrakawa, Keiichi Murakami
  • Patent number: 11076410
    Abstract: A user terminal includes: a reception section that receives a downlink signal including a demodulation reference signal; a signal separation section that separates the demodulation reference signal from the downlink signal based on an expansion pattern obtained by applying a set expansion method to expand a basic pattern; and a channel estimation section that uses the demodulation reference signal to compute a channel estimation value. The basic pattern indicates resource elements to which a demodulation reference signal of 8 layers is mapped, and the expansion pattern indicates resource elements to which a demodulation reference signal of 16 layers is mapped.
    Type: Grant
    Filed: December 1, 2017
    Date of Patent: July 27, 2021
    Assignee: NTT DOCOMO, INC.
    Inventors: Keisuke Saito, Kazuaki Takeda, Satoshi Nagata
  • Publication number: 20210227515
    Abstract: A user terminal according to one aspect of the present disclosure includes: a receiving section that receives downlink control information including a given field indicating a frequency domain resource to be assigned to a downlink shared channel or an uplink shared channel; and a control section that controls reception of the downlink shared channel or transmission of the uplink shared channel based on whether or not information related to a band for initial access in a carrier is given by a higher layer.
    Type: Application
    Filed: May 18, 2018
    Publication date: July 22, 2021
    Applicant: NTT DOCOMO, INC.
    Inventors: Hideaki Takahashi, Kazuki Takeda, Hiroki Harada
  • Publication number: 20210227430
    Abstract: A technique is provided that is for efficiently avoiding interference that occurs due to simultaneous communication with different radio systems. An aspect of the present invention relates to user equipment including a cellular communication controller that controls first radio communication with a cellular system, and a different radio system communication controller that controls second radio communication with a different radio system other than the cellular system, wherein the cellular communication controller reports, to the cellular system, interference notice indicating interference between the first radio communication and the second radio communication, based on information obtained in the first radio communication.
    Type: Application
    Filed: January 26, 2017
    Publication date: July 22, 2021
    Applicant: NTT DOCOMO, INC.
    Inventors: Kei Andou, Takao Shimizu
  • Publication number: 20210224823
    Abstract: A mobile terminal apparatus includes: an evaluator configured to, based on pre-purchase information relating to activities of a user during a pre-purchase period before purchase of an electronic ticket and post-purchase information relating to activities of a user during a post-purchase period after the purchase of the electronic ticket, evaluate identicalness of the user during the post-purchase period and a person who purchased the electronic ticket; and a setter configured to set a state relating to validity of the electronic ticket based on a result of the evaluation by evaluator.
    Type: Application
    Filed: February 28, 2019
    Publication date: July 22, 2021
    Applicant: NTT DOCOMO, INC.
    Inventors: Kazuto OOMORI, Kouki HAYASHI, Osamu GOTO
  • Publication number: 20210227479
    Abstract: A terminal is disclosed including a receiver that receives configuration information indicating a gap offset in subframe units related to a measurement gap (MG), and a shift time shorter than one subframe and related to the MG. The terminal further includes a processor that determines a timing of the MG based on the gap offset and the shift time. In other aspects, a radio communication method for a terminal and a base station are also disclosed.
    Type: Application
    Filed: December 4, 2018
    Publication date: July 22, 2021
    Applicant: NTT DOCOMO, INC.
    Inventor: Hiroki Harada
  • Publication number: 20210226683
    Abstract: To appropriately control a plurality of CSI reports of different types, a user terminal according to one aspect of the present disclosure includes: a transmitting section that transmits channel state information (CSI) reports of different types; and a control section that, when transmission durations of a plurality of the CSI reports overlap, drops a given CSI report according to priority or multiplexes a given CSI report on a given uplink channel, based on a type of each of the plurality of the CSI reports and a type of an uplink channel used for transmission of each of the plurality of the CSI reports.
    Type: Application
    Filed: August 10, 2018
    Publication date: July 22, 2021
    Applicant: NTT DOCOMO, INC.
    Inventors: Shohei Yoshioka, Yuki Matsumura, Satoshi Nagata
  • Publication number: 20210227514
    Abstract: A user terminal includes a receiving section that performs monitoring of downlink control channel candidates in at least one of a plurality of cells having a plurality of numerologies, a transmitting section that transmits a parameter indicating a capability for the monitoring, and a control section that determines at least one number of a first maximum number of blind decodings of the downlink control channel candidates within a unit of time and a second maximum number of channel estimation control channel elements within the unit of time for each of the plurality of numerologies based on the parameter to control the monitoring, based on the number.
    Type: Application
    Filed: May 11, 2018
    Publication date: July 22, 2021
    Applicant: NTT DOCOMO, INC.
    Inventors: Kazuki Takeda, Satoshi Nagata
  • Publication number: 20210226759
    Abstract: In order to properly transmit UCI, even when PUCCH repetition transmission is used in future radio communication systems, a user terminal according to one aspect of the present disclosure includes a control section that determines a codebook for physical uplink control channel (PUCCH) transmission per slot, based on at least one of physical downlink shared channel (PDSCH) candidate occasions, a timing of hybrid automatic repeat request acknowledgement (HARQ-ACK) transmission corresponding to a received PDSCH and a PUCCH repetition factor, when PUCCH repetition transmission and a semi-static HARQ-ACK codebook are configured; and a transmitting section that transmits HARQ-ACK based on the codebook by applying the PUCCH repetition transmission.
    Type: Application
    Filed: July 30, 2018
    Publication date: July 22, 2021
    Applicant: NTT DOCOMO, INC.
    Inventors: Kazuki Takeda, Satoshi Nagata, Lihui Wang, Shaozhen Guo, Xiaolin Hou
  • Publication number: 20210227399
    Abstract: A measuring method executes an identifying procedure of measuring signal power of a beam from user equipment supporting beam-formed transmission, identifying a measurement antenna that detects a peak of the beam transmitted from the user equipment; a calculating procedure of calculating a first angle formed between a straight line connecting the measurement antenna detecting the peak of the beam transmitted from the user equipment to the user equipment and a straight line connecting a measurement antenna located in a direction of an azimuth angle rotation axis of the user equipment to the user equipment; and a rotating procedure of rotating the user equipment based on the first angle.
    Type: Application
    Filed: May 21, 2019
    Publication date: July 22, 2021
    Applicant: NTT DOCOMO, INC.
    Inventors: Takayuki Furuta, Seiji Hagiwara
  • Publication number: 20210227513
    Abstract: A user terminal includes: a receiving section that receives downlink control information for instructing activation or deactivation of a semi-persistent channel state information reporting; and a control section that determines whether or not the downlink control information instructs the deactivation based on a value of at least one field including a frequency domain resource allocation field of the downlink control information.
    Type: Application
    Filed: March 14, 2018
    Publication date: July 22, 2021
    Applicant: NTT DOCOMO, INC.
    Inventors: Kazuki Takeda, Shohei Yoshioka, Satoshi Nagata, Lihui Wang, Huiling Li, Xiaolin Hou
  • Publication number: 20210227503
    Abstract: To appropriately transmit uplink control information even when allocations of uplink control channels used for transmission of the uplink control information overlap each other, a user terminal according to one aspect of the present disclosure includes a transmitting section that transmits transmission confirmation signals for downlink shared channels by using uplink control channel resources, and a control section that determines an uplink control channel to be applied to transmission of a plurality of the transmission confirmation signals, based on a certain selection criterion, when the uplink control channel resources for the plurality of the transmission confirmation signals overlap each other in a time domain.
    Type: Application
    Filed: May 11, 2018
    Publication date: July 22, 2021
    Applicant: NTT DOCOMO, INC.
    Inventors: Shohei Yoshioka, Yuki Matsumura, Kazuki Takeda, Satoshi Nagata
  • Publication number: 20210227549
    Abstract: A user terminal of the present invention includes a receiving section that receives system information including an index value indicating a first offset value that is a value based on a certain bandwidth or zero, and a control section that determines frequency resources for an uplink control channel, based on the first offset value, the frequency resources frequency-hopping in the certain bandwidth.
    Type: Application
    Filed: May 11, 2018
    Publication date: July 22, 2021
    Applicant: NTT DOCOMO, INC.
    Inventors: Daisuke Murayama, Hiroki Harada, Kazuaki Takeda, Satoshi Nagata
  • Publication number: 20210227558
    Abstract: To appropriately perform communication that uses a precoding group in a future radio communication system, a user terminal according to one aspect of the present disclosure includes: a receiving section that receives a downlink shared channel precoded per Precoding Resource Group (PRG) configured to include a given number of frequency resources; and a control section that controls the reception of the downlink shared channel that is scheduled by a downlink control channel of a control resource set configured by common information of a downlink control channel configuration, and includes the PRG partitioned from a given resource number included in the control resource set or an initial downlink BWP.
    Type: Application
    Filed: August 20, 2018
    Publication date: July 22, 2021
    Applicant: NTT DOCOMO, INC.
    Inventors: Yuki Matsumura, Kazuki Takeda, Satoshi Nagata
  • Publication number: 20210227557
    Abstract: A terminal is disclosed that includes a receiver that receives a first downlink control information for scheduling a physical uplink shared channel (PUSCH) transmission, and a second downlink control information for notifying a time region and a frequency region in which the PUSCH is not to be transmitted. The terminal further includes a processor that supports reception of the second downlink control information in a slot that is shorter than a slot for transmitting the PUSCH. In other aspects, a radio communication method and a base station are also disclosed.
    Type: Application
    Filed: March 22, 2021
    Publication date: July 22, 2021
    Applicant: NTT DOCOMO, INC.
    Inventors: Kazuki Takeda, Satoshi Nagata, Qun Zhao, Xiaohang Chen, Lihui Wang
  • Publication number: 20210227568
    Abstract: To prevent a communication throughput and/or communication quality from lowering even when one or more partial bands are configured in a carrier, one aspect of a user terminal according to the present invention includes: a receiving section that receives a downlink signal in one of a plurality of partial bands that are configurable in a carrier; and a control section that controls reception of a reference signal for radio link monitoring configured per the plurality of partial bands.
    Type: Application
    Filed: December 4, 2017
    Publication date: July 22, 2021
    Applicant: NTT DOCOMO, INC.
    Inventor: Hiroki Harada
  • Patent number: 11070334
    Abstract: For the purpose of reducing the deterioration of the quality of communication and/or the drop in the efficiency of the use of resources even when communication is carried out based on different configurations from those of existing LTE systems, according to one aspect of the present invention, a user terminal has a receiving section that receives a downlink control channel, which is transmitted by using a downlink control channel element comprised of a plurality of resource element groups (REGs) and/or one or more REG groups, and a reference signal, which is used to demodulate the downlink control channel, and a control section that controls receipt of the downlink control channel in a certain field, and an allocation pattern of the reference signal is configured in association with at least one of the REG group, the downlink control channel element and the certain field.
    Type: Grant
    Filed: April 20, 2017
    Date of Patent: July 20, 2021
    Assignee: NTT DOCOMO, INC.
    Inventors: Kazuki Takeda, Satoshi Nagata, Qin Mu, Liu Liu, Xu Zhang
  • Patent number: 11071163
    Abstract: A user apparatus for use in a mobile communication system that supports Device-to-Device (D2D) communication, including a receiver that receives a resource for D2D communication assigned from a base station in the mobile communication system; a transmitter that transmits a D2D signal to another user apparatus by using the resource for D2D communication assigned from the base station; and a processor that generates a resource release request signal for requesting release of the resource for D2D communication assigned from the base station, wherein the transmitter transmits, to the base station, the resource release request signal for requesting release of the resource for D2D communication assigned from the base station, and wherein the transmitter transmits a resource request signal to the base station as the resource release request signal for requesting release of the resource.
    Type: Grant
    Filed: August 5, 2015
    Date of Patent: July 20, 2021
    Assignee: NTT DOCOMO, INC.
    Inventors: Shimpei Yasukawa, Hiroki Harada, Satoshi Nagata
  • Patent number: 11071117
    Abstract: Provided are a resource determination method, a base station and a mobile station. A resource determination method performed by the base station according to embodiments of the present invention includes: determining a resource configuration used for uplink transmission for each mobile station group in a plurality of mobile station groups corresponding to the base station; determining a resource offset set used for the plurality of mobile station groups, wherein the resource offset set includes a plurality of resource candidate offsets such that a mobile station connected to the base station determines uplink transmission resources for the mobile station according to the resource configuration of the mobile station group to which the mobile station belongs and resource candidate offsets in the resource offset set.
    Type: Grant
    Filed: August 18, 2017
    Date of Patent: July 20, 2021
    Assignee: NTT DOCOMO, INC.
    Inventors: Xiaohang Chen, Anxin Li, Qin Mu, Liu Liu, Huiling Jiang, Satoshi Nagata