Patents Assigned to NTT DoCoMo, Inc.
  • Patent number: 10341073
    Abstract: An information transmission method used in a base station includes: determining mode indication information regarding reference signals to be transmitted; transmitting the mode indication information to a mobile station; and transmitting the reference signals to the mobile station based on the mode indication information.
    Type: Grant
    Filed: August 8, 2016
    Date of Patent: July 2, 2019
    Assignee: NTT DOCOMO, INC.
    Inventors: Satoshi Nagata, Yuichi Kakishima, Xi Luan, Chongning Na, Xiaolin Hou, Huiling Jiang
  • Patent number: 10341499
    Abstract: A communication terminal device is a mobile communication terminal device that carries out communication for voice calls. In the case where an incoming voice call is received, the communication terminal device measures an orientation and a displacement of the device itself, and determines whether or not a condition occurring when a user picks up the device in his/her hand is met. After determining that the condition occurring when a user picks up the device in his/her hand is met, in the case where the communication terminal device determines that the device is detected as being near the user's head area and furthermore determines that an utterance from the user has been detected while the user's head area is detected as being near, the device carries out a notification processing for notifying the user that a response to the incoming call will be made, after which the response to the incoming call is made.
    Type: Grant
    Filed: January 18, 2016
    Date of Patent: July 2, 2019
    Assignee: NTT DOCOMO, INC.
    Inventors: Satoru Kawamura, Nobuto Arai
  • Patent number: 10341996
    Abstract: A user apparatus configured to perform communication with a base station in a mobile communication system that supports downlink spatial multiplexing, including: transmission means configured to transmit capability information of the user apparatus to the base station; reception means configured to receive configuration information from the base station; bit width determination means configured, if a parameter indicating a transmission mode corresponding to the downlink spatial multiplexing and predetermined additional information are received as the configuration information, to determine a bit width of a rank indicator based on the predetermined additional information.
    Type: Grant
    Filed: June 23, 2016
    Date of Patent: July 2, 2019
    Assignee: NTT DOCOMO, INC.
    Inventors: Hideaki Takahashi, Kazuaki Takeda
  • Patent number: 10342061
    Abstract: A radio communication system is disclosed that includes at least one user equipment and multiple base stations including a first base station configured to execute radio resource control of the user equipment through a control path and a second base station configured not to execute radio resource control of the user equipment. The system includes multiple gateways, including a first gateway connected with the first base station and a second gateway connected with the second base station, and a switching station that controls the establishment of user paths among nodes.
    Type: Grant
    Filed: March 8, 2018
    Date of Patent: July 2, 2019
    Assignee: NTT DOCOMO, INC.
    Inventors: Jinho Kim, Hiroto Yasuda, Yasufumi Morioka, Hideaki Takahashi, Junichiro Hagiwara, Hiroyuki Ishii
  • Publication number: 20190199484
    Abstract: A user apparatus configured to communicate with a base station in a mobile communication system that supports carrier aggregation formed by a plurality of cells including a first cell and a second cell that uses a unit time length different from a unit time length of the first cell, including: a reception unit configured to receive downlink data transmitted from the base station in the second cell, and generate transmittal acknowledgement information for the downlink data; and a transmission unit configured to bundle a plurality of pieces of transmittal acknowledgement information, generated in the reception unit, for a plurality of pieces of downlink data into one piece of transmittal acknowledgement information to transmit the bundled transmittal acknowledgement information to the base station in the first cell.
    Type: Application
    Filed: February 28, 2019
    Publication date: June 27, 2019
    Applicant: NTT DOCOMO, INC.
    Inventors: Tooru Uchino, Kunihiko Teshima, Kazuki Takeda, Hideaki Takahashi
  • Publication number: 20190200242
    Abstract: A specific cell radio base station 20 transmits an update request to an operation apparatus 30 via the secured connection, the update request including at least identification information of an update target provided in the specific cell radio base station. The operation apparatus 30 provides an update information to the specific cell radio base station 20 via the secured connection in response to the update request.
    Type: Application
    Filed: January 28, 2011
    Publication date: June 27, 2019
    Applicant: NTT DOCOMO, INC.
    Inventor: Hiroyuki HOSONO
  • Publication number: 20190199492
    Abstract: Embodiments of the present invention provide a CSI-RS transmission method, a CSI detection method, a base station, and a mobile station. The method for transmitting Channel State Information Reference Signals (CSI-RSs) performed by the base station according to the embodiments of the present invention includes: aggregating a plurality of CSI-RS initial resource configurations to obtain an CSI-RS aggregation resource configuration; transmitting CSI-RSs of a first antenna port in the antenna array at a first density, using a first part of resource configuration of the CSI-RS aggregation resource configuration; and transmitting CSI-RSs of a second antenna port in the antenna array at a second density, using a second part of resource configuration of the CSI-RS aggregation resource configuration.
    Type: Application
    Filed: May 8, 2017
    Publication date: June 27, 2019
    Applicant: NTT DOCOMO INC.
    Inventors: Chongning NA, Huiling JIANG, Yuichi KAKASHIMA, Satoshi NAGATA
  • Publication number: 20190199826
    Abstract: In a communication system (1) including a terminal (10), a base station (20), a processing server (30) that executes a process related to the terminal, and one or a plurality of serving gateways (40), the processing server (30) includes: a determination unit (31) that determines whether or not an unused bearer other than a used bearer used for a service process is to be established on the basis of a system load for bearer maintenance and a system load for bearer establishment when the determination unit receives a service processing request from the terminal that is in an idle state; and a bearer establishment control unit (32) that performs control so that the unused bearer determined to be established by the determination unit (31) and the used bearer are established between a corresponding serving gateway and the terminal.
    Type: Application
    Filed: July 6, 2017
    Publication date: June 27, 2019
    Applicant: NTT DOCOMO, INC.
    Inventors: Masayoshi Shimizu, Atsushi Minokuchi, Takuya Shimojou
  • Publication number: 20190200375
    Abstract: A user equipment in a radio communication system, the user equipment including: a storage unit that stores configuration information in which priority of data is associated with a carrier or a carrier group; a selection unit that determines priority of transmission data that is transmitted from the user equipment, and selects a carrier or a carrier group that corresponds to the priority that is determined on the basis of the configuration information; and a transmission unit that transmits the transmission data by using the carrier or the carrier group that is selected by the selection unit.
    Type: Application
    Filed: August 8, 2017
    Publication date: June 27, 2019
    Applicant: NTT DOCOMO, INC.
    Inventors: Shinpei Yasukawa, Kazuki Takeda, Satoshi Nagata
  • Publication number: 20190200349
    Abstract: The present invention is designed so that uplink control channels can be transmitted adequately even in carriers in which listening is required prior to transmission. A user terminal according to one example of the present invention communicates in a plurality of cells, including at least one uplink control channel-configured cell in which an uplink control channel is configured, and this user terminal has a measurement section that executes listening for two or more cells among the plurality of cells, in a given period, and a control section that controls to transmit an uplink control signal in at least one cell where listening has succeeded.
    Type: Application
    Filed: September 7, 2017
    Publication date: June 27, 2019
    Applicant: NTT DOCOMO, INC.
    Inventors: Hiroki Harada, Satoshi Nagata, Jing Wang, Liu Liu, Huiling Jiang
  • Patent number: 10334603
    Abstract: The present invention is designed to provide a radio base station, a user terminal, a radio communication system and a radio communication method of novel structures that can improve the efficiency of the use of radio resources sufficiently.
    Type: Grant
    Filed: January 24, 2014
    Date of Patent: June 25, 2019
    Assignee: NTT DOCOMO, INC.
    Inventors: Anass Benjebbour, Yoshihisa Kishiyama
  • Patent number: 10332180
    Abstract: A method and apparatus for proximity service discovery are disclosed.
    Type: Grant
    Filed: December 21, 2015
    Date of Patent: June 25, 2019
    Assignee: NTT DOCOMO, INC.
    Inventors: Ulas C. Kozat, Fujio Watanabe, Danh Le, Erdi Olmezogullari
  • Patent number: 10333215
    Abstract: A multi-band array antenna comprises m first antenna elements operating in p frequency bands; n second antenna elements operating in q frequency bands; a Wilkinson power distributor; one or more filters; and one or more matching circuits. Here, m and n are positive integers satisfying m+n?3 and any of m=n+1, n=m+1 and m=n; and p and q are positive integers satisfying p?1, q?2 and q>p. The m first antenna elements and the n second antenna elements are alternately arranged. The matching circuit performs impedance matching between the filter and the Wilkinson power distributor in a frequency band attenuated by the filter. A series-connection circuit portion is configured so that a branch portion of the power distributor becomes an open end in the attenuation frequency band.
    Type: Grant
    Filed: April 22, 2016
    Date of Patent: June 25, 2019
    Assignee: NTT DOCOMO, INC.
    Inventors: Yasunori Suzuki, Makoto Sumi, Takashi Hosozawa
  • Publication number: 20190191401
    Abstract: The present invention is designed so that synchronization signals and/or reference signals that are designed by taking into account the requirements for carriers can be used. According to one aspect of the present invention, a user terminal has a receiving section that receives at least one of a narrowband signal and a wideband signal, which are designed to share the same transmission timing, and a control section that exerts control, in which at least one of the narrowband signal and the wideband signal is used for synchronization and/or measurement, and the receiving section receives the narrowband signal in a partial frequency domain that is included in the frequency domain of the wideband signal, and receives the wideband signal in the frequency domain that includes the frequency domain of the narrowband signal.
    Type: Application
    Filed: August 30, 2017
    Publication date: June 20, 2019
    Applicant: NTT DOCOMO, INC.
    Inventors: Hiroki Harada, Kazuki Takeda, Satoshi Nagata
  • Publication number: 20190190675
    Abstract: The present invention is designed so that allocation of signals can be controlled appropriately even when multiple frame configurations are introduced. A control section that controls communication using a plurality of frame configurations that are applied to downlink data transmission, and a receiving section that receives a downlink reference signal are provided, and the receiving section performs reception, assuming that the downlink reference signal is allocated to a common time field and/or frequency field in the plurality of frame configurations. Furthermore, a control section that controls communication using a plurality of frame configurations that are applied to uplink data transmission, and a transmission section that transmits a measurement reference signal are provided, and the transmission section allocates the uplink reference signal to a common time field and/or frequency field in the plurality of frame configurations, and performs transmission.
    Type: Application
    Filed: June 14, 2017
    Publication date: June 20, 2019
    Applicant: NTT DOCOMO, INC.
    Inventors: Kazuki Takeda, Satoshi Nagata
  • Publication number: 20190190572
    Abstract: The present invention is designed to improve the receiving characteristics of UL signals in multi-antenna transmission in the UL in future radio communication systems. According to the present invention, a user terminal has a transmission section that transmits an uplink (UL) signal, which is precoded per precoding group comprised of a predetermined number of frequency resource units, and a control section that controls the precoding of the UL signal. The control section controls the size of the precoding group in the frequency direction.
    Type: Application
    Filed: August 2, 2017
    Publication date: June 20, 2019
    Applicant: NTT DOCOMO, INC.
    Inventors: Ryosuke Osawa, Hiroki Harada, Kazuki Takeda, Yuichi Kakishima
  • Publication number: 20190190645
    Abstract: A radio communication apparatus functioning as a transmitter in a radio communication system including the transmitter and a receiver includes a first data generation unit that generates first data which are to be transmitted in accordance with a first transmission scheme, a second data generation unit that generates second data which are to be transmitted in accordance with a second transmission scheme, a transmission parameter determination unit that determines a first transmission parameter for the first data and a second transmission parameter for the second data, and a transmission unit that, when the second data are generated during transmission of the first data, punctures a portion of a resource allocated for the transmission of the first data, transmits the first data using the first transmission parameter in an unpunctured portion, and transmits the second data using the second transmission parameter in the punctured portion.
    Type: Application
    Filed: May 2, 2017
    Publication date: June 20, 2019
    Applicant: NTT DOCOMO, INC.
    Inventors: Yousuke Sano, Kazuaki Takeda, Kazuki Takeda, Satoshi Nagata
  • Publication number: 20190190763
    Abstract: The present invention is designed to properly transmit demodulation reference signals for UL data channels in short TTIs. A user terminal according to one aspect of the present invention has a transmission section that transmits a demodulation reference signal for an uplink (UL) data channel, and a control section that controls the transmission of the demodulation reference signal, and, when the UL data channel is transmitted in a second transmission time interval (TTI), which is comprised of a smaller number of symbols than a first TTI, the control section maps the demodulation reference signal to a symbol that is selected based on the arrangement pattern of the second TTI.
    Type: Application
    Filed: August 3, 2017
    Publication date: June 20, 2019
    Applicant: NTT DOCOMO, INC.
    Inventors: Kazuki Takeda, Satoshi Nagata, Lihui Wang, Liu Liu, Huiling Jiang, Can Li, Yong Li, Wenbo Wang
  • Publication number: 20190191443
    Abstract: A radio communication apparatus functioning as a transmitter in a radio communication system including the transmitter and a receiver includes a first data generation unit that generates first data which are to be transmitted in accordance with a first transmission scheme, a second data generation unit that generates second data which are to be transmitted in accordance with a second transmission scheme, and a transmission unit that, when the second data are generated during transmission of the first data, punctures a portion in which a predetermined signal is transmitted in a resource allocated for the transmission of the first data, transmits the first data in an unpunctured portion, and transmits the second data in the punctured portion.
    Type: Application
    Filed: April 28, 2017
    Publication date: June 20, 2019
    Applicant: NTT DOCOMO, INC.
    Inventors: Yousuke Sano, Kazuaki Takeda, Kazuki Takeda, Satoshi Nagata
  • Publication number: 20190190784
    Abstract: A storage request accepting unit 11 acquires correspondence information in which a service, a slice, and context information are associated with each other. A status acquiring unit 13 acquires positional information of a UE 130 and identifies staying information from the positional information. An assignment unit 14 assigns a slice corresponding to a service used by the UE 130 and context information represented by the correspondence information. In this case, a slice management device 10 assigns a slice to a service in accordance with the context information such as a staying status or the like of the UE 130, and accordingly, a slice assigned to the service can be dynamically changed.
    Type: Application
    Filed: August 2, 2017
    Publication date: June 20, 2019
    Applicant: NTT DOCOMO, INC.
    Inventors: Takuya Shimojou, Shigeru Iwashina, Masayoshi Shimizu