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公开(公告)号：US10785760B2
公开(公告)日：2020-09-22
申请号：US16145599
申请日：2018-09-28
Applicant: KYOCERA CORPORATION
Inventor： Hiroyuki Urabayashi , Chiharu Yamazaki , Kugo Morita , Fangwei Tong
Abstract: A base station according to one embodiment comprises a controller configured to perform a downlink transmission process using a subframe. The subframe comprises a main PDCCH (Physical Downlink Control Channel) region located at a head portion of the subframe, and a data region other than the main PDCCH region. The data region comprises a short TTI region to which a short TTI (Transmission Time Interval) having a shorter time length than the subframe is applied. The short TTI region comprises a sub-PDCCH region. The controller is configured to arrange information indicating the sub-PDCCH region in the main PDCCH region.
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公开(公告)号：US10716077B2
公开(公告)日：2020-07-14
申请号：US16052399
申请日：2018-08-01
Applicant: KYOCERA CORPORATION
Inventor： Hiroyuki Urabayashi
Abstract: A base station according to one embodiment includes: a transmitter configured to transmit a synchronization signal in a cell using a predetermined subcarrier spacing, the cell being managed by the base station; and a controller configured to arrange, based on the predetermined subcarrier spacing, the synchronization signal in a plurality of discrete subcarriers not continuous in a frequency direction.
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公开(公告)号：US10285146B2
公开(公告)日：2019-05-07
申请号：US15511305
申请日：2015-09-16
Applicant: KYOCERA CORPORATION
Inventor： Hiroyuki Urabayashi , Chiharu Yamazaki , Naohisa Matsumoto , Noriyoshi Fukuta , Kugo Morita , Masato Fujishiro
Abstract: A base station manages a first cell and a second cell and communicates with a user terminal by carrier aggregation which is applied to the first cell and the second cell, the first cell being allocated a licensed band requiring a license and a second cell being allocated an unlicensed band not requiring a license. The base station includes: a transmitter configured to transmit a synchronization signal used for synchronization between the second cell and the user terminal, by at least one carrier selected from the unlicensed band based on a result of carrier sensing in the second cell; and a controller configured to instruct the user terminal to perform a detection operation of the synchronization signal for all or part of the carrier through the first cell.
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公开(公告)号：US11910211B2
公开(公告)日：2024-02-20
申请号：US17643374
申请日：2021-12-08
Applicant: KYOCERA Corporation
Inventor： Naohisa Matsumoto , Kugo Morita , Hiroyuki Adachi , Hiroyuki Urabayashi , Chiharu Yamazaki
CPC classification number: H04W24/08 , H04W16/14 , H04W24/10 , H04W36/0058
Abstract: 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.
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公开(公告)号：US11601856B2
公开(公告)日：2023-03-07
申请号：US17228373
申请日：2021-04-12
Applicant: KYOCERA Corporation
Inventor： Masato Fujishiro , Hiroyuki Urabayashi , Hiroyuki Adachi , Henry Chang
Abstract: A user equipment, apparatus provided in a user equipment, and method are for receiving a Multicast Broadcast Service, and include receiving a system information block (SIB) from a current serving cell of the user equipment, and performing a cell reselection operation where a cell having a highest ranking determined based on a radio quality and an offset is selected as a serving cell of the user equipment from among a plurality of cells. In the cell reselection operation, a determination is made, based on the SIB, whether to use an infinite offset as the offset to be applied to a cell providing the Multicast Broadcast Service.
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Patent Agency Ranking
公开(公告)号：US11310752B2
公开(公告)日：2022-04-19
申请号：US16899360
申请日：2020-06-11
Applicant: KYOCERA Corporation
Inventor： Hiroyuki Urabayashi
Abstract: A user equipment, an apparatus for controlling user equipment, and a method receive measurement configuration information from a first cell, the measurement configuration information indicating a subcarrier spacing applied to a second cell, and perform measurement on the second cell based on the measurement configuration information.
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公开(公告)号：US10973050B2
公开(公告)日：2021-04-06
申请号：US16140222
申请日：2018-09-24
Applicant: KYOCERA CORPORATION
Inventor： Hiroyuki Urabayashi
Abstract: A radio terminal according to one embodiment is used in a mobile communication system supporting uplink transmission using an unlicensed spectrum. The user terminal comprises a controller configured to perform LBT (Listen-Before-Talk) before the uplink transmission. The controller applies a first LBT scheme to the LBT, in response to reception of information indicating the first LBT scheme from a base station. The controller applies a second LBT scheme to the LBT, in response to reception of information indicating the second LBT scheme with a shorter LBT time interval than the first LBT scheme, from the base station.
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公开(公告)号：US10834710B2
公开(公告)日：2020-11-10
申请号：US16320249
申请日：2017-07-25
Applicant: KYOCERA Corporation
Inventor： Chiharu Yamazaki , Hiroyuki Urabayashi
Abstract: 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.
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公开(公告)号：US10813056B2
公开(公告)日：2020-10-20
申请号：US16184368
申请日：2018-11-08
Applicant: KYOCERA CORPORATION
Inventor： Hiroyuki Urabayashi , Fangwei Tong , Atsuhisa Inakoshi , Chiharu Yamazaki
Abstract: A radio terminal according to one embodiment comprises a controller configured to receive first control information for receiving, by the radio terminal, a special downlink control channel. The special downlink control channel carries control information to the radio terminal from a first cell with no connection for transmitting and receiving user data being established. The controller directly receives second control information for reducing an uplink interference in the first cell, on the special downlink control channel, from the first cell.
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公开(公告)号：US10779354B2
公开(公告)日：2020-09-15
申请号：US15693675
申请日：2017-09-01
Applicant: KYOCERA CORPORATION
Inventor： Yushi Nagasaka , Masato Fujishiro , Kugo Morita , Hiroyuki Adachi , Fangwei Tong , Shingo Katagiri , Chiharu Yamazaki , Hiroyuki Urabayashi , Naohisa Matsumoto , Katsuhiro Mitsui
Abstract: A communication method according to an embodiment comprises: notifying, by a base station, a radio terminal of a discontinuous reception (DRX) cycle; notifying, by a Mobility Management Entity (MME), the radio terminal of an extended DRX cycle longer than the DRX cycle; determining, by the radio terminal, whether or not the base station supports an extend DRX; using, by the radio terminal, the extended DRX cycle to execute an extended DRX operation in an idle mode, in response to determining that the base station supports the extend DRX; and using, by the radio terminal, the DRX cycle to execute a DRX operation without using the extended DRX cycle, in response to determining that the base station does not support the extend DRX.
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