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).
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Publication number: 20210068064Abstract: 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: ApplicationFiled: January 11, 2018Publication date: March 4, 2021Applicant: NTT DOCOMO, INC.Inventors: Hiroki Harada, Daiki Takeda, Satoshi Nagata
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Patent number: 10925019Abstract: Even when different numerologies from those of legacy LTE systems are used, synchronization signals are appropriately transmitted and/or received. A user terminal 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, and spacings of the first synchronization signal and the second synchronization signal at which the first synchronization signal and the second synchronization signal are mapped on subcarriers are different.Type: GrantFiled: November 1, 2017Date of Patent: February 16, 2021Assignee: NTT DOCOMO, INC.Inventors: Daiki Takeda, Hiroki Harada, Satoshi Nagata
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Publication number: 20200366398Abstract: A terminal is disclosed including a receiver that receives a synchronization signal/physical broadcast channel (SS/PBCH) block including a synchronization signal (SS) and a physical broadcast channel (PBCH); and a processor that determines a control resource set based on configuration information in a configuration information set of a plurality of configuration information sets, the configuration information set being associated with information based on the SS/PBCH block, the configuration information being associated with a value of a field in the PBCH, and the configuration information including a plurality of parameters regarding the control resource set. In other aspects, a radio communication method and a base station are also disclosed.Type: ApplicationFiled: November 16, 2017Publication date: November 19, 2020Applicant: NTT DOCOMO, INC.Inventors: Daiki Takeda, Kazuki Takeda, Hiroki Harada, Yousuke Sano
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Publication number: 20200314776Abstract: A terminal is disclosed including a receiver that detects a synchronization signal (SS)/physical broadcast channel (PBCH) block including an SS and a PBCH; and a processor that determines a resource for monitoring a downlink control channel based on a field in the PBCH, and at least one of a first subcarrier spacing of the SS/PBCH block, a second subcarrier spacing of the resource, a frequency band, and an index of the SS/PBCH block. In other aspects, a radio communication method for a terminal and a base station are also disclosed.Type: ApplicationFiled: October 6, 2017Publication date: October 1, 2020Applicant: NTT DOCOMO, INC.Inventors: Hiroki Harada, Daiki Takeda, Daisuke Murayama, Satoshi Nagata
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Publication number: 20200260299Abstract: A terminal is disclosed including a processor that controls reception of a first synchronization signal (PSS), a second synchronization signal (SSS), and a broadcast channel (PBCH) in a predetermined block that is formed by a predetermined number of symbols and a predetermined number of subcarriers; and a receiver that receives the PSS, the SSS and the PBCH that form the predetermined block, wherein the PSS and the SSS are located in a first frequency domain, wherein the PBCH is located in at least part of a second frequency domain that is broader than the first frequency domain, and wherein the PBCH is located in at least part of a first predetermined domain neighboring the SSS in the frequency direction in the predetermined block and the PBCH is not located in a second predetermined domain neighboring the PSS in the frequency direction in the predetermined block.Type: ApplicationFiled: October 2, 2018Publication date: August 13, 2020Applicant: NTT DOCOMO, INC.Inventors: Hiroki Harada, Yousuke Sano, Daiki Takeda
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Patent number: 10721676Abstract: The present invention is designed to reduce communication overhead in communication in which beamforming is used. A user terminal according to one aspect of the present invention has a transmission section that transmits a beam identification signal for identifying a given beam, a receiving section that receives given information transmitted in the given beam based on the beam identification signal, and a control section that controls transmission of the beam identification signal.Type: GrantFiled: May 8, 2017Date of Patent: July 21, 2020Assignee: NTT DOCOMO, INC.Inventors: Kazuki Takeda, Keisuke Saito, Daiki Takeda, Satoshi Nagata
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Publication number: 20200221404Abstract: A terminal is disclosed including a receiver configured to receive a synchronization signal block (SS/PBCH block) including information that indicates a configuration of a control resource set; and a processor configured to determine a position of the control resource set relative to the SS/PBCH block based on the information. In other aspects, another terminal, a radio communication method for a terminal, and a base station are also disclosed.Type: ApplicationFiled: September 18, 2018Publication date: July 9, 2020Applicant: NTT DOCOMO, INC.Inventors: Daiki Takeda, Satoshi Nagata, Daisuke Murayama, Hiroki Harada
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Publication number: 20200145939Abstract: 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: ApplicationFiled: April 28, 2017Publication date: May 7, 2020Applicant: NTT DOCOMO, INC.Inventors: Hiroki Harada, Kazuaki Takeda, Daiki Takeda, Satoshi Nagata
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Publication number: 20200128498Abstract: 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: ApplicationFiled: June 15, 2017Publication date: April 23, 2020Applicant: NTT DOCOMO, INC.Inventors: Hiroki Harada, Daiki Takeda, Satoshi Nagata
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Publication number: 20200119965Abstract: In order to transmit and receive signals properly in a radio communication system in which communication is performed based on different formats than in existing LTE systems, a user terminal, according to one aspect of the present invention, has a receiving section that receives a synchronization signal block, which contains a plurality of synchronization signals and a plurality of broadcast channels that are allocated in different time fields, and a control section that selects time information of the synchronization signal block based on the broadcast channels and/or demodulation reference signals allocated in the same time fields with the broadcast channels, and the synchronization signal block contains broadcast channels that are allocated in three or more time fields, including at least contiguous time fields, respectively.Type: ApplicationFiled: June 2, 2017Publication date: April 16, 2020Applicant: NTT DOCOMO, INC.Inventors: Hiroki Harada, Daiki Takeda, Satoshi Nagata
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Publication number: 20200119966Abstract: A base station apparatus communicates with a plurality of user apparatuses and includes a transmitting unit that transmits a plurality of radio signals to the plurality of user apparatuses, and a control unit that arranges a periodic block including a synchronization signal and system information in one or more radio signals of the plurality of radio signals based on a subcarrier spacing of the radio signal.Type: ApplicationFiled: June 16, 2017Publication date: April 16, 2020Applicant: NTT DOCOMO, INC.Inventors: Daiki Takeda, Hiroki Harada, Satoshi Nagata
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Publication number: 20200099567Abstract: A user apparatus that uses a plurality of subcarrier spacings is disclosed. The user apparatus includes a receiver that receives a synchronization signal and system information. The user apparatus further includes a processor that determines, on a basis of the subcarrier spacings, positions of symbols to which periodic blocks including the synchronization signal and the system information are mapped. In other aspects, a base station apparatus and a communication method are also disclosed.Type: ApplicationFiled: May 2, 2017Publication date: March 26, 2020Applicant: NTT DOCOMO, INC.Inventors: Daiki Takeda, Hiroki Harada, Satoshi Nagata
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Publication number: 20200068513Abstract: A base station for communicating with a user device includes: a setting unit configured to set, to a block including a synchronization signal and system information, information indicating a transmission period of a block set including the one or more blocks, and a communication unit configured to transmit the block set to the user device in the transmission period, and to perform an initial access process with the user device based on the system information included in the block.Type: ApplicationFiled: May 2, 2017Publication date: February 27, 2020Applicant: NTT DOCOMO, INC.Inventors: Daiki Takeda, Hiroki Harada, Satoshi Nagata
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Publication number: 20200059873Abstract: Even when different numerologies from those of legacy LTE systems are used, synchronization signals are appropriately transmitted and/or received. A user terminal 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, and spacings of the first synchronization signal and the second synchronization signal at which the first synchronization signal and the second synchronization signal are mapped on subcarriers are different.Type: ApplicationFiled: November 1, 2017Publication date: February 20, 2020Applicant: NTT DOCOMO, INC.Inventors: Daiki Takeda, Hiroki Harada, Satoshi Nagata
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Publication number: 20200059810Abstract: 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: ApplicationFiled: May 2, 2017Publication date: February 20, 2020Applicant: NTT DOCOMO, INC.Inventors: Hiroki Harada, Daiki Takeda, Satoshi Nagata, Jing Wang
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Publication number: 20200036420Abstract: 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: ApplicationFiled: August 30, 2019Publication date: January 30, 2020Applicant: NTT DOCOMO, INC.Inventors: Yoshihisa Kishiyama, Daiki Takeda
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Publication number: 20190349108Abstract: In one aspect of the present invention, a base station includes an index generation unit configured to generate an index indicating a time-domain location of a synchronization signal block where a synchronization signal or a physical broadcast channel is placed; and a transmission unit configured to transmit a portion of the index using one or more synchronization signal of a primary synchronization signal, a secondary synchronization signal, and a tertiary synchronization signal and transmit a remaining portion of the index using the physical broadcast channel.Type: ApplicationFiled: January 22, 2018Publication date: November 14, 2019Applicant: NTT DOCOMO, INC.Inventors: Daiki Takeda, Hiroki Harada, Satoshi Nagata
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Publication number: 20190246453Abstract: Disclosed is a scheme of transmitting various types of radio signals for which interference between adjacent cells is considered in a radio communication system (for example, dynamic TDD) in which uplink communication and downlink communication can be dynamically switched. A feature of the present invention relates to user equipment including a transceiver that performs transmission and reception of a radio signal with a base station in accordance with a communication scheme in which uplink communication and downlink communication are dynamically switched and a signal processor that processes the radio signal, wherein the transceiver transmits a connection request signal generated by the signal processor in fixed uplink radio resources of the communication scheme.Type: ApplicationFiled: October 31, 2017Publication date: August 8, 2019Applicant: NTT DOCOMO, INC.Inventors: Yousuke Sano, Kazuki Takeda, Kazuaki Takeda, Daiki Takeda, Daisuke Murayama, Satoshi Nagata
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Patent number: 10359581Abstract: A clamp member includes: a body part that includes a fiber insertion hole where an optical fiber is inserted and a hole for tension member where a tension member is inserted; and an anchoring screw that fixes the tension member to the body part. The clamp member is fixed to an end of an optical cable that includes the optical fiber and the tension member, and the clamp member is fixed to and housed in an outer housing of an optical connector.Type: GrantFiled: September 10, 2018Date of Patent: July 23, 2019Assignee: Fujikura Ltd.Inventors: Daiki Takeda, Shigeo Takahashi
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Patent number: 10345545Abstract: An optical fiber cable is provided. The cable includes: an optical fiber core having a central axis; a presser winding covering the optical fiber core; a sheath covering the presser winding; two tension members in the sheath and facing each other with the central axis therebetween; and two rip cords facing each other with the central axis therebetween and being in direct contact with the sheath and the presser winding. The optical fiber core includes a plurality of optical fiber tapes arranged around the central axis and having mutually different stripe ring marks applied thereon. Each optical fiber tapes includes a plurality of optical fibers intermittently adhered to each other.Type: GrantFiled: November 28, 2017Date of Patent: July 9, 2019Assignee: FUJIKURA LTD.Inventors: Tomoaki Kaji, Masatoshi Ohno, Daiki Takeda, Ken Osato, Masayoshi Yamanaka, Naoki Okada