Patents by Inventor Daiki TAKEDA

Daiki TAKEDA has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20220182212
    Abstract: A user equipment includes a receiving unit that receives, from a base station apparatus, a resource configuration used for uplink and downlink in time division duplex and information indicating an allocation pattern of a resource used for uplink and downlink in time division duplex in a radio access technology that differs from a radio access technology of the user equipment; a control unit that determines, based on the resource configuration and the information indicating the allocation pattern, a resource used for the uplink and the downlink in the time division duplex used by the user equipment; and a communication unit that performs communication with the base station apparatus on the determined resource used for the uplink and the downlink in the time division duplex.
    Type: Application
    Filed: March 28, 2019
    Publication date: June 9, 2022
    Applicant: NTT DOCOMO, INC.
    Inventors: Daiki Takeda, Kazuaki Takeda, Hiroki Harada, Takayuki Isogawa
  • Publication number: 20220167385
    Abstract: A user equipment including: a transmission unit that transmits a signal to a base station apparatus using a preconfigured uplink resource; a reception unit that receives a signal from the base station apparatus; and a control unit that starts or restarts a predetermined timer in response to receiving the signal from the base station apparatus.
    Type: Application
    Filed: March 29, 2019
    Publication date: May 26, 2022
    Applicant: NTT DOCOMO, INC.
    Inventors: Daiki Takeda, Kazuaki Takeda, Hiroki Harada, Takayuki Isogawa
  • Publication number: 20220141810
    Abstract: A user equipment includes a control unit that sets an operation mode of the user equipment to an idle mode; and a transmission unit that transmits, while a time alignment retained by the control unit is valid, information indicating presence of the user equipment on each of transmission resources with a predetermined frequency in a time direction, from among a plurality of transmission resources that is preconfigured for transmitting data in the idle mode and arranged in the time direction, wherein the transmission unit stops transmitting the information indicating the presence of the user equipment in response detecting that the time alignment is invalid.
    Type: Application
    Filed: February 14, 2019
    Publication date: May 5, 2022
    Applicant: NTT DOCOMO, INC.
    Inventors: Daiki Takeda, Kazuaki Takeda, Takayuki Isogawa, Tomoya Ohara
  • Publication number: 20220124617
    Abstract: There are provided a user terminal, a radio base station, and a radio communication method in which a wake-up signal (WUS) is capable of being suitably introduced under the presence of multiple user terminals. The user terminal includes a reception section which receives a wake-up signal, and a control section which detects an identifier associated with the wake-up signal and controls, based on the detected identifier, reception of a control signal associated with the wake-up signal. The number of the wake-up signals is smaller than a number relating to a terminal group.
    Type: Application
    Filed: September 27, 2018
    Publication date: April 21, 2022
    Applicant: NTT DOCOMO, INC.
    Inventors: Daiki Takeda, Kazuaki Takeda
  • Publication number: 20220116897
    Abstract: A terminal is disclosed that includes a receiving section that receives a synchronization signal (SS) block, which includes a synchronization signal and a broadcast channel; and a control section that specifies identification information of the SS block, based on Demodulation Reference Signal (DMRS) that are multiplexed over a plurality of symbols for Physical Broadcast Channel (PBCH) in the SS block. In other aspects, a radio communication method is also disclosed.
    Type: Application
    Filed: December 21, 2021
    Publication date: April 14, 2022
    Applicant: NTT DOCOMO, INC.
    Inventors: Hiroki Harada, Daiki Takeda, Satoshi Nagata
  • Publication number: 20220104176
    Abstract: A user equipment includes a control unit that sets an operation mode of the user equipment to an idle mode; a transmission unit that transmits data by using a preconfigured radio resource for transmitting data in the idle mode; and a reception unit that receives transmission acknowledgement information for the data by monitoring at least one search space from a paging search space or an additional search space that is to be monitored in the idle mode.
    Type: Application
    Filed: February 14, 2019
    Publication date: March 31, 2022
    Applicant: NTT DOCOMO, INC.
    Inventors: Daiki Takeda, Kazuaki Takeda, Takayuki Isogawa, Tomoya Ohara
  • Publication number: 20220060994
    Abstract: Provided are a method and device for uplink power control. A user terminal performing the method includes: a receiving unit configured to receive signature information for the user terminal from a base station; and a control unit configured to determine a transmission power of the user terminal according to the received signature information.
    Type: Application
    Filed: September 28, 2018
    Publication date: February 24, 2022
    Applicant: NTT DOCOMO, INC.
    Inventors: Runxin Wang, Wenjia Liu, Xiaolin Hou, Kazuaki Takeda, Daiki Takeda
  • Patent number: 11252683
    Abstract: SS block identification information is identified with high reliability and/or low complexity. According to one aspect of the present invention, a user terminal has a receiving section that receives a synchronization signal (SS) block, which includes a synchronization signal and a broadcast channel; and a control section that specifies identification information of the SS block, based on at least one of a difference of demodulation reference signal sequences for the broadcast channel, a difference of mapping pattern of the reference signal sequences, and a difference of frequency position to which the reference signal sequences are mapped, among a plurality of symbols in the SS block.
    Type: Grant
    Filed: June 15, 2017
    Date of Patent: February 15, 2022
    Assignee: NTT DOCOMO, INC.
    Inventors: Hiroki Harada, Daiki Takeda, Satoshi Nagata
  • Publication number: 20220046573
    Abstract: A terminal includes a receiving unit that receives information indicating whether each condition of one or more conditions for validating a time alignment is activated or deactivated; and a control unit that independently activates or deactivates each condition of the one or more conditions in accordance with the received information.
    Type: Application
    Filed: February 17, 2020
    Publication date: February 10, 2022
    Applicant: NTT DOCOMO, INC.
    Inventors: Daiki Takeda, Kazuaki Takeda, Takayuki Isogawa, Takuma Takada
  • Publication number: 20220039010
    Abstract: There are provided a user terminal, a radio base station, and a radio communication method that are capable of configuring a wake-up signal (WUS) that possibly ensures compatibility. The user terminal includes a reception section that receives a second wake-up signal which is multiplexed onto a first wake-up signal, using a prescribed multiplexing scheme, and is transmitted. Furthermore, the user terminal includes a control section that detects an identifier that is associated with the second wake-up signal, and controls reception of a control signal that is associated with the detected identifier.
    Type: Application
    Filed: September 27, 2018
    Publication date: February 3, 2022
    Applicant: NTT DOCOMO, INC.
    Inventors: Daiki Takeda, Kazuaki Takeda
  • Publication number: 20220006579
    Abstract: Provided by an embodiment of the present invention are a user equipment and base station that may be used in a wireless communication system, or a method performed by the user equipment and the base station. The user equipment according to the embodiment of the present invention includes: a receiving unit that is configured to receive multiple access signature information for the user equipment from a base station, wherein the multiple access signature information includes correction information indicating a reference signal sequence sent with respect to the user equipment; and a control unit that is configured to determine the reference signal sequence of the user equipment according to the received correction information.
    Type: Application
    Filed: September 28, 2018
    Publication date: January 6, 2022
    Applicant: NTT DOCOMO, INC.
    Inventors: Runxin Wang, Wenjia Liu, Xiaolin Hou, Daiki Takeda
  • Publication number: 20210392505
    Abstract: A user terminal includes a receiving section that receives a first synchronization signal block in a first carrier to which listening is applied and monitors a first downlink control channel for scheduling first system information based on the first synchronization signal block, and a control section that determines resources of the first downlink control channel using a determination method different from a determination method of resources of a second downlink control channel for scheduling second system information in a second carrier to which the listening is not applied. According to one aspect of the present disclosure, appropriate communication can be performed in a band to which listening is applied.
    Type: Application
    Filed: November 9, 2018
    Publication date: December 16, 2021
    Applicant: NTT DOCOMO, INC.
    Inventors: Hiroki Harada, Daisuke Murayama, Shohei Yoshioka, Daiki Takeda
  • Patent number: 11191043
    Abstract: A terminal is disclosed including a receiver that receives a synchronization signal block including a synchronization signal and a broadcast channel, and a processor that, if specified information is notified to the terminal, derives, based on a timing of a serving cell, a synchronization signal block index for another cell. In other aspects, a radio communication method for a terminal is also disclosed.
    Type: Grant
    Filed: May 2, 2017
    Date of Patent: November 30, 2021
    Assignee: NTT DOCOMO, INC.
    Inventors: Hiroki Harada, Daiki Takeda, Satoshi Nagata, Jing Wang
  • Publication number: 20210318407
    Abstract: A user equipment comprises a transmitter configured to transmit a signal to a base station apparatus; a controller configured to determine whether an environment to the base station apparatus is a line of sight (LOS) environment. The controller changes an operation according to the determined environment, or the transmitter transmits to the base station apparatus information indicating the determined environment.
    Type: Application
    Filed: August 7, 2018
    Publication date: October 14, 2021
    Applicant: NTT DOCOMO, INC.
    Inventors: Tomoya Ohara, Hiroki Harada, Daiki Takeda
  • Patent number: 11115945
    Abstract: To transmit and receive signals in a radio communication system where communication is carried out based on different configurations from those of existing LTE systems, in accordance with one aspect of the present invention, a user terminal has a receiving section that receives a synchronization signal arranged in a first frequency domain and a broadcast channel arranged in a second frequency domain, which is wider than the first frequency domain, and a control section that controls a receiving process of DL signals, and the control section controls the receiving process on the assumption that, in at least part of given frequency domain that neighbors the first frequency domain, no DL signal is mapped or a specific DL signal is mapped.
    Type: Grant
    Filed: April 28, 2017
    Date of Patent: September 7, 2021
    Assignee: NTT DOCOMO, INC.
    Inventors: Hiroki Harada, Kazuaki Takeda, Daiki Takeda, Satoshi Nagata
  • Publication number: 20210243680
    Abstract: A terminal is disclosed including a receiver that receives configuration information regarding a physical downlink control channel (PDCCH) to configure a common search space; and a processor that monitors downlink control information in the common search space based on the configuration information, wherein the configuration information includes information regarding a search space that is able to be specified by bits in an index of a master information block (MIB) and information regarding a search space index associated with a given search space. In other aspects, a radio communication method, a base station, and a system are also disclosed.
    Type: Application
    Filed: May 10, 2018
    Publication date: August 5, 2021
    Applicant: NTT DOCOMO, INC.
    Inventors: Hiroki Harada, Daiki Takeda, Tomoya Ohara, Hideaki Takahashi, Kazuki Takeda
  • Publication number: 20210160794
    Abstract: A terminal is disclosed that includes a reception section that receives a first synchronization signal and a second synchronization signal mapped on predetermined resources and a control section that controls synchronization processing based on the first synchronization signal and the second synchronization signal, where a same transmission bandwidth and subcarrier spacing are applied to the first synchronization signal and the second synchronization signal. In other aspects, a radio communication method is also disclosed.
    Type: Application
    Filed: January 8, 2021
    Publication date: May 27, 2021
    Applicant: NTT DOCOMO, INC.
    Inventors: Daiki Takeda, Hiroki Harada, Satoshi Nagata
  • Publication number: 20210120506
    Abstract: A user terminal is disclosed including a reception section that receives a Synchronization Signal (SS) block including a synchronization signal and a broadcast channel and a control section that specifies SS block identification information based on at least a sequence of a first reference signal and a sequence of a second reference signal. The sequence of the first reference signal being a sequence to be allocated to a first symbol, and being generated based on cell identification information for identifying a cell and a first part of the SS block identification information for identifying the SS block. The sequence of the second reference signal being a sequence to be allocated to a second symbol, being generated based on the cell identification information for identifying the cell and a second part of the SS block identification information, and being different from the sequence of the first reference signal.
    Type: Application
    Filed: July 28, 2017
    Publication date: April 22, 2021
    Applicant: NTT DOCOMO, INC.
    Inventors: Daiki Takeda, Hiroki Harada, Satoshi Nagata
  • Patent number: 10972167
    Abstract: A user apparatus communicating with a base station in a radio communication system including the base station and the user apparatus includes a first receiving unit to receive multiple first reference signals transmitted from the base station; a detection unit to detect a specific antenna port via which the plurality of first reference signals is received, or a specific directivity pattern, among a plurality of directivity patterns generated by a plurality of antenna ports, in which the plurality of first reference signals are received; a measuring unit to measure reception power of each of the first reference signals; and a transmission unit to group the reception power of each of the first reference signals into one of groups of the specific antenna port and the specific directivity pattern via which the first reference signals are received to transmit the groups of the reception power to the base station.
    Type: Grant
    Filed: August 30, 2019
    Date of Patent: April 6, 2021
    Assignee: NTT DOCOMO, INC.
    Inventors: Yoshihisa Kishiyama, Daiki Takeda
  • Publication number: 20210068064
    Abstract: To prevent occurrence of delay and/or increase in power consumption at the time of access to a network in future radio communication systems, one aspect of a user terminal according to the present disclosure includes: a receiving section that receives a synchronization signal block including a broadcast channel in a certain sync raster; and a control section that controls, based on certain bit information of a certain information element included in the synchronization signal block, a sync raster to be detected by variably interpreting bit information included in at least one of the certain information element and another information element.
    Type: Application
    Filed: January 11, 2018
    Publication date: March 4, 2021
    Applicant: NTT DOCOMO, INC.
    Inventors: Hiroki Harada, Daiki Takeda, Satoshi Nagata