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公开(公告)号：US11350460B2
公开(公告)日：2022-05-31
申请号：US16573799
申请日：2019-09-17
Applicant: KYOCERA Corporation
Inventor： Masato Fujishiro , Hiroyuki Urabayashi , Hiroyuki Adachi
Abstract: A communication control method according to one embodiment is used in a mobile communication system. The communication control method comprises a step A of predicting, by a UE, a radio condition within a second period after connection between the UE and a eNB is established, in a first period for which the connection is not established, and a step B of performing, by the UE, a random access procedure for establishing the connection. The step B includes a step of performing notification of information on the predicted radio condition from the UE to the eNB in the random access procedure. The information is used, by the eNB, for controlling communication with the UE.
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公开(公告)号：US11051209B2
公开(公告)日：2021-06-29
申请号：US16268705
申请日：2019-02-06
Applicant: KYOCERA CORPORATION
Inventor： Hiroyuki Urabayashi , Chiharu Yamazaki
Abstract: 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.
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公开(公告)号：US11032673B2
公开(公告)日：2021-06-08
申请号：US16328594
申请日：2017-08-23
Applicant: KYOCERA Corporation
Inventor： Masato Fujishiro , Henry Chang , Hiroyuki Urabayashi
Abstract: A radio terminal includes a receiver configured to receive a counting request, the counting request requesting transmission of a counting response from a plurality of radio terminals that are receiving a specific MBMS service or interested in the reception of the specific MBMS service, and a common resource setting from a network, the common resource setting indicating a common resource pool to be commonly used by the plurality of radio terminals for the transmission of the counting response; a controller configured to determine whether or not the radio terminal is receiving the specific MBMS service or interested in the reception thereof in response to receiving the counting request; and a transmitter configured to transmit the counting response to the network by using a radio resource included in the common resource pool in response to the determination that the radio terminal is receiving the specific MBMS service or interested in the reception thereof.
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公开(公告)号：US10306637B2
公开(公告)日：2019-05-28
申请号：US15582986
申请日：2017-05-01
Applicant: KYOCERA CORPORATION
Inventor： Noriyoshi Fukuta , Naohisa Matsumoto , Hiroyuki Urabayashi , Henry Chang
Abstract: A radio base station according to an embodiment is a radio base station configured to use a specific frequency band which includes a plurality of component carriers having a predetermined bandwidth and which is allowed to be utilized by a plurality of network operators or a plurality of communication systems. The radio base station comprises: a controller configured to select, from among the plurality of component carriers, a target component carrier in which a reference signal used in the specific frequency band should be transmitted; and a transmitter configured to use the target component carrier to transmit the reference signal. The controller selects, as the target component carrier, a first component carrier that satisfies a first condition. The first condition is that an interference power amount falls below a predetermined threshold value.
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公开(公告)号：US09844095B2
公开(公告)日：2017-12-12
申请号：US15617453
申请日：2017-06-08
Applicant: KYOCERA CORPORATION
Inventor： Hiroyuki Urabayashi , Noriyoshi Fukuta
CPC classification number: H04W76/28 , H04W4/06 , H04W8/26 , H04W48/12 , H04W72/005 , H04W72/042 , H04W72/1289 , H04W76/40 , H04W88/02 , H04W88/12
Abstract: A user terminal according to one aspect executes a first and second DRX operations. The first DRX operation is an operation of discontinuously monitoring first control information, which is transmitted from the base station via PDCCH, using a C-RNTI that uniquely identifies the user terminal in a cell of the base station. The second DRX operation is an operation of discontinuously monitoring second control information, which is transmitted from the base station via the PDCCH, using a group RNTI assigned to a terminal group including the user terminal. The user terminal monitors the first control information in a first ON duration for the first DRX operation, and monitors the second control information in a second ON duration for the second DRX operation, the second ON duration being independent of the first ON duration.
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Patent Agency Ranking
公开(公告)号：US09843427B2
公开(公告)日：2017-12-12
申请号：US14647810
申请日：2013-11-11
Applicant: KYOCERA CORPORATION
Inventor： Hiroyuki Urabayashi , Naohisa Matsumoto
CPC classification number: H04L5/005 , H04L1/0026 , H04L1/0035 , H04L1/0693 , H04L5/0023 , H04L5/0085 , H04W48/12 , H04W72/042
Abstract: A base station that communicates with a plurality of user terminals in a mobile communication system in which a radio signal including a reference signal for estimating a channel characteristic is transmitted and received, comprises: a control unit that changes a reference signal density that is a density of the reference signal applied to communication with the plurality of user terminals. The control unit calculates a statistics amount of communication quality information acquired for all the plurality of user terminals, and changes the reference signal density on the basis of the statistics amount.
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公开(公告)号：US11503595B2
公开(公告)日：2022-11-15
申请号：US16364252
申请日：2019-03-26
Applicant: KYOCERA Corporation
Inventor： Hiroyuki Urabayashi , Chiharu Yamazaki , Hiroyuki Adachi , Amit Kalhan
Abstract: A mobile communication method for performing predetermined communication between a base station and a user terminal by using a narrow band including 6 resource blocks comprises: transmitting, from the base station to the user terminal, narrow band allocation information allocating a predetermined number of the narrow bands to the user terminal as allocation information of the narrow band used for the predetermined communication; performing by the user terminal, the predetermined communication by using the predetermined number of narrow bands based on the narrow band allocation information; transmitting, from the base station to the user terminal, an RRC message including information specifying a bandwidth supportable by the user terminal; and changing, by the base station, a number of bits of the narrow band allocation information according to the bandwidth supportable by the user terminal. The predetermined number of narrow bands are provided within a bandwidth supportable by the user terminal.
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公开(公告)号：US11228927B2
公开(公告)日：2022-01-18
申请号：US16736431
申请日：2020-01-07
Applicant: KYOCERA Corporation
Inventor： Naohisa Matsumoto , Kugo Morita , Hiroyuki Adachi , Hiroyuki Urabayashi , Chiharu Yamazaki
Abstract: 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.
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公开(公告)号：US11201763B2
公开(公告)日：2021-12-14
申请号：US16189598
申请日：2018-11-13
Applicant: KYOCERA CORPORATION
Inventor： Hiroyuki Urabayashi
Abstract: A communication method according to one embodiment comprises: transmitting, by a base station that manages a Licensed-Assisted Access (LAA) cell, downlink control information (DCI) to a user equipment, the DCI including subframe information and a transmission instruction of a sounding reference signal in the LAA cell, the subframe information indicates a specific subframe in which the user equipment should transmit the sounding reference signal; and transmitting, by the user equipment, the sounding reference signal to the base station in the specific subframe, based on the DCI.
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公开(公告)号：US11012906B2
公开(公告)日：2021-05-18
申请号：US16526900
申请日：2019-07-30
Applicant: KYOCERA Corporation
Inventor： Masato Fujishiro , Hiroyuki Urabayashi , Hiroyuki Adachi , Henry Chang
Abstract: A user equipment receives an MBMS service provided using SC-PTM transmission. The user equipment performs a cell reselection operation of selecting a cell to be used as a serving cell of the user equipment while the user equipment is in an RRC idle mode. In the cell reselection operation, the user equipment selects, as the serving cell, a cell having a highest ranking determined based on a radio quality and an offset from among a plurality of cells. In the cell reselection operation, when the user equipment is in an enhanced coverage, the user equipment uses an infinite offset as the offset to be applied to a cell where the MBMS service is provided by the SC-PTM transmission, in response to a predetermined condition for the SC-PTM transmission being satisfied, when the user equipment goes out of the enhanced coverage, stop using the infinite offset.
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