Patents by Inventor Chiharu Yamazaki
Chiharu Yamazaki 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: 20220104047Abstract: A user equipment, method used in a user equipment, and an apparatus for a user equipment include receiving from a first cell operated in a licensed band, configuration information configuring a second cell operated in an unlicensed band, performing a listen-before-talk (LBT) procedure on the second cell, counting a number of failures of the LBT procedure on the second cell, and transmitting information based on the number of failures of the LBT procedure on the second cell, to the first cell operated in the licensed band, the information indicating the failure of the LBT procedure on the second cell.Type: ApplicationFiled: December 8, 2021Publication date: March 31, 2022Applicant: KYOCERA CorporationInventors: Naohisa MATSUMOTO, Kugo MORITA, Hiroyuki ADACHI, Hiroyuki URABAYASHI, Chiharu YAMAZAKI
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Patent number: 11252618Abstract: User equipment, apparatus and method perform dual connectivity with a first base station acting as a master base station and a second base station acting as a secondary base station, transmit to the master base station capability information indicating that the user equipment supports a function of skipping a random access procedure, and receive from the master base station, a message instructing to change the secondary base station from the second base station to a third base station. The message includes information indicating that random access procedure for the third base station is skipped and an including an uplink grant indicating radio resources allocated by the third base station and a timing advance (TA) value to be applied to an uplink transmission to the third base station. The user equipment transmits the uplink transmission to the third base station by using the uplink radio resources indicated by the uplink grant.Type: GrantFiled: August 4, 2020Date of Patent: February 15, 2022Assignee: KYOCERA CorporationInventors: Masato Fujishiro, Chiharu Yamazaki, Kugo Morita, Noriyoshi Fukuta
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Patent number: 11228927Abstract: A user terminal, method used in a user terminal, and an apparatus for a user terminal include receiving from a base station measurement configuration information configuring measurement of a frequency channel in an unlicensed band, measuring signal strength of radio signals transmitted in the frequency channel, determining occupancy situation of the frequency channel based on the measured signal strength and a threshold, and transmitting to the base station a measurement report including information indicating the occupancy situation of the frequency channel.Type: GrantFiled: January 7, 2020Date of Patent: January 18, 2022Assignee: KYOCERA CorporationInventors: Naohisa Matsumoto, Kugo Morita, Hiroyuki Adachi, Hiroyuki Urabayashi, Chiharu Yamazaki
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Patent number: 11201688Abstract: A user equipment, method and apparatus receive a PDSCH from a base station and determine a modulation order used in the PDSCH based on whether the PDSCH is transmitted in a second slot out of a first slot and the second slot which configure a subframe.Type: GrantFiled: September 2, 2020Date of Patent: December 14, 2021Assignee: KYOCERA CorporationInventors: Masato Fujishiro, Chiharu Yamazaki, Hiroyuki Urabayashi, Noriyoshi Fukuta, Naohisa Matsumoto
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Patent number: 11159974Abstract: A user equipment, an apparatus, and a method receive from a base station configuration information on a carrier aggregation where a Licensed-Assisted Access (LAA) secondary cell using unlicensed frequency is utilized, configure the carrier aggregation based on the configuration information, receive from the base station information indicating whether uplink data transmission via the LAA secondary cell is allowed, and transmit uplink data via the LAA secondary cell only in response to receiving the information indicating that uplink data transmission via the LAA secondary cell is allowed.Type: GrantFiled: June 11, 2020Date of Patent: October 26, 2021Assignee: KYOCERA CorporationInventors: Masato Fujishiro, Chiharu Yamazaki, Yushi Nagasaka, Katsuhiro Mitsui
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Patent number: 11115980Abstract: A base station performs radio communication with a radio terminal using at least one narrow frequency band where the number of resource blocks is limited to a predetermined resource block number. The base station comprises a transmitter configured to transmit, to the radio terminal, configuration information for frequency hopping where the radio communication is performed while switching the narrow frequency band; and a controller configured to allocate, to the radio terminal, a first frequency band of the frequency hopping and a frequency band of a hopping destination. The first frequency band and the frequency band of the hopping destination respectively include the narrow frequency band and fraction resource blocks. The fraction resource blocks are resource blocks, the number of which is smaller than the predetermined resource block number.Type: GrantFiled: January 24, 2018Date of Patent: September 7, 2021Assignee: KYOCERA CorporationInventors: Hiroyuki Urabayashi, Masato Fujishiro, Chiharu Yamazaki
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Patent number: 11089600Abstract: A base station (200) according to one embodiment uses a specific frequency band shared by a plurality of operators and/or a plurality of communication systems. The base transmit, to a radio terminal (100-1), interference-related information relating to interference detected by the base station in the specific frequency band.Type: GrantFiled: August 8, 2016Date of Patent: August 10, 2021Assignee: KYOCERA CorporationInventors: Naohisa Matsumoto, Hiroyuki Urabayashi, Kugo Morita, Masato Fujishiro, Hiroyuki Adachi, Chiharu Yamazaki, Fangwei Tong
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Patent number: 11051209Abstract: A mobile communication method according to an embodiment includes a step in which a base station configured to perform communication by using a narrow band which is a second bandwidth narrower than a first bandwidth compatible with a first user terminal in one unit time transmits information for allocating a second user terminal an extended band having a third bandwidth wider than the second bandwidth and narrower than the first bandwidth in the one unit time.Type: GrantFiled: February 6, 2019Date of Patent: June 29, 2021Assignee: KYOCERA CorporationInventors: Hiroyuki Urabayashi, Chiharu Yamazaki
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Patent number: 11032776Abstract: A base station according to one embodiment may comprise a receiver configured to receive first information from a radio terminal, the first information being transmitted based on a measurement result of a reception signal from a neighbouring cell; and a transmitter configured to transmit second information for reducing a transmission power of the radio terminal to the radio terminal when the measurement result of the reception signal from the radio terminal exceeds a threshold value.Type: GrantFiled: November 8, 2018Date of Patent: June 8, 2021Assignee: KYOCERA CorporationInventors: Fangwei Tong, Hiroyuki Urabayashi, Atsuhisa Inakoshi, Chiharu Yamazaki
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Patent number: 10985864Abstract: A user equipment, apparatus and method comprise starting reception from a base station from a second slot out of a first slot and the second slot which configure a subframe, determining a first modulation order used for downlink control information transmitted in the second slot, and starting the reception from the second slot by using the first modulation order. The downlink control information is a PDCCH or an EPDCCH.Type: GrantFiled: May 3, 2019Date of Patent: April 20, 2021Assignee: KYOCERA CorporationInventors: Masato Fujishiro, Chiharu Yamazaki, Hiroyuki Urabayashi, Noriyoshi Fukuta, Naohisa Matsumoto
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Patent number: 10985807Abstract: A base station according to an embodiment supports full-dimension MIMO (FD-MIMO). The base station includes: an antenna array having antenna elements arranged two-dimensionally in a horizontal direction and a vertical direction; and a controller configured to perform a process of transmitting a dedicated reference signal that is a reference signal used for measurement of channel characteristics and is individually generated for a radio terminal. The controller is configured to select a specific target radio terminal from among target radio terminals to be connected to the base station, and perform a process of transmitting the dedicated reference signal only to the specific target radio terminal.Type: GrantFiled: August 5, 2016Date of Patent: April 20, 2021Assignee: KYOCERA CorporationInventors: Fangwei Tong, Chiharu Yamazaki, Noriyoshi Fukuta, Akinori Iwabuchi, Hironobu Kobayashi
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Patent number: 10952096Abstract: A base station includes a controller that performs multicast service SC-PTM transmission, and a transmitter that transmits SC-PTM configuration information related to a configuration of the SC-PTM transmission via a SC-PTM control channel, which is a logical channel different from a MCCH, and transmits multicast data via a traffic channel for the SC-PTM transmission. Each of the SC-PTM control channel and the traffic channel is mapped on a DL-SCH. The transmitter transmits a SIB related to the SC-PTM control channel via a BCCH, transmits first resource allocation information for transmitting the SC-PTM configuration information via a PDCCH, where a predetermined RNTI for the SC-PTM control channel is applied to transmission of the first resource allocation information, and transmits second resource allocation information for transmitting multicast data by the SC-PTM transmission via the PDCCH.Type: GrantFiled: September 11, 2019Date of Patent: March 16, 2021Assignee: KYOCERA CorporationInventors: Masato Fujishiro, Chiharu Yamazaki, Henry Chang, Amit Kalhan
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Patent number: 10945235Abstract: A first radio terminal transmits and receives a radio signal by using a limited frequency band limited to a bandwidth of a predetermined number of resource blocks. A second radio terminal transmits and receives a radio signal by using a frequency band wider than the limited frequency band. A base station transmits configuration information of SC-MTCH by SC-MCCH. The base station sets a first period to the first radio terminal and sets a second period shorter than the first period to the second radio terminal as an SC-MCCH change period in which the configuration information of the SC-MTCH can be changed. The base station receives an MBMS interest indication from the first radio terminal, the first radio terminal being in a connected mode, and determines whether or not to shift the first radio terminal to an idle mode based on the MBMS interest indication.Type: GrantFiled: March 26, 2019Date of Patent: March 9, 2021Assignee: KYOCERA CorporationInventors: Masato Fujishiro, Hiroyuki Urabayashi, Chiharu Yamazaki, Henry Chang
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Patent number: 10911999Abstract: A user terminal, a base station, and method include a user terminal performing D2D communication under management of a base station, the D2D communication indicating direct device to device communication including transmitting data to one or more D2D communication destinations in the D2D communication and transmitting a D2D buffer status report to the base station. The user terminal transmits to the base station a D2D buffer status report indicating an amount of non-transmitted data in the D2D communication and a plurality of identifiers corresponding to the one or more D2D communication destinations. The plurality of identifiers corresponding to the one or more D2D communication destinations does not include the identifier of the base station to which the D2D buffer status report is transmitted.Type: GrantFiled: April 29, 2019Date of Patent: February 2, 2021Assignee: KYOCERA CorporationInventor: Chiharu Yamazaki
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Publication number: 20200403724Abstract: A user equipment, method and apparatus receive a PDSCH from a base station and determine a modulation order used in the PDSCH based on whether the PDSCH is transmitted in a second slot out of a first slot and the second slot which configure a subframe.Type: ApplicationFiled: September 2, 2020Publication date: December 24, 2020Applicant: KYOCERA CorporationInventors: Masato FUJISHIRO, Chiharu YAMAZAKI, Hiroyuki URABAYASHI, Noriyoshi FUKUTA, Naohisa MATSUMOTO
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Publication number: 20200389890Abstract: A communication method, first communication apparatus, and chipset included in a first communication apparatus function to receive from a base station first information indicating that the base station supports a relay apparatus configured to relay traffic between the base station and another communication apparatus, transmit to the base station, after receiving the first information from the base station, second information indicating that the first communication apparatus is the relay apparatus, and transmit to the base station, by the first communication apparatus, third information indicating expected data amount of the first communication apparatus. Abase station is configured to transmit the first information to the first communication apparatus, thereafter receive the second information, and receive the third information.Type: ApplicationFiled: August 24, 2020Publication date: December 10, 2020Applicant: KYOCERA CorporationInventors: Masato FUJISHIRO, Chiharu YAMAZAKI
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Patent number: 10863533Abstract: A base station according to an embodiment includes a controller configured to perform a process of transmitting, in a specific frequency band shared by a plurality of operators and/or a plurality of communication systems, a burst signal including data or a control signal and a discovery reference signal including a reference signal and/or a synchronization signal. If there is a transmission duration of the discovery signal within a transmission duration of the burst signal after starting the transmission of the burst signal, the controller performs a process of transmitting the discovery reference signal even within the transmission duration of the burst signal.Type: GrantFiled: March 23, 2018Date of Patent: December 8, 2020Assignee: KYOCERA CORPORATIONInventors: Hiroyuki Urabayashi, Chiharu Yamazaki, Naohisa Matsumoto, Noriyoshi Fukuta, Masato Fujishiro
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Publication number: 20200383168Abstract: A user equipment, method used in user equipment, and apparatus for controlling a user equipment operate to receiving a connected mode DRX parameter configured by a base station, and transmit to the base station a message including information indicating a connected mode DRX parameter preferred by the user equipment. The connected mode DRX parameter preferred by the user equipment includes at least one of DRX-InactivityTimer, DRX-ShortCycle, and DRX-ShortCycleTimer.Type: ApplicationFiled: August 19, 2020Publication date: December 3, 2020Applicant: KYOCERA CorporationInventors: Yushi NAGASAKA, Masato FUJISHIRO, Kugo MORITA, Hiroyuki ADACHI, Fangwei TONG, Shingo KATAGIRI, Chiharu YAMAZAKI, Hiroyuki URABAYASHI, Naohisa MATSUMOTO, Katsuhiro MITSUI
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Publication number: 20200367118Abstract: User equipment, apparatus and method perform dual connectivity with a first base station acting as a master base station and a second base station acting as a secondary base station, transmit to the master base station capability information indicating that the user equipment supports a function of skipping a random access procedure, and receive from the master base station, a message instructing to change the secondary base station from the second base station to a third base station. The message includes information indicating that random access procedure for the third base station is skipped and an including an uplink grant indicating radio resources allocated by the third base station and a timing advance (TA) value to be applied to an uplink transmission to the third base station. The user equipment transmits the uplink transmission to the third base station by using the uplink radio resources indicated by the uplink grant.Type: ApplicationFiled: August 4, 2020Publication date: November 19, 2020Applicant: KYOCERA CorporationInventors: Masato FUJISHIRO, Chiharu YAMAZAKI, Kugo MORITA, Noriyoshi FUKUTA
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Patent number: 10834710Abstract: A radio terminal according to one embodiment comprises: a controller configured to perform a process of: receiving, if the radio terminal is in a specific state different from an RRC connected state, multicast/broadcast data transmitted from a base station; and transmitting feedback information on the multicast/broadcast data to the base station. The controller is configured to autonomously determine a transmission parameter to be used for transmitting the feedback information and transmits the feedback information by using the determined transmission parameter.Type: GrantFiled: July 25, 2017Date of Patent: November 10, 2020Assignee: KYOCERA CorporationInventors: Chiharu Yamazaki, Hiroyuki Urabayashi