公开(公告)号：US20230397089A1

公开(公告)日：2023-12-07

申请号：US18451005

申请日：2023-08-16

Applicant: KYOCERA Corporation

Inventor： Hiroyuki URABAYASHI ,  Kugo MORITA

IPC: H04W48/10 ,  H04J11/00 ,  H04W16/14

CPC classification number: H04W48/10 ,  H04J11/0073 ,  H04J11/0076 ,  H04J11/0079 ,  H04W16/14

Abstract: User equipment, an apparatus configured to control user equipment, and a method. The method may include receiving by a user equipment from a base station, a synchronization signal and a master information block, the master information block transmitted at a same transmission cycle as a transmission cycle of the synchronization signal. The method may further include receiving by the user equipment from the base station, first information indicating time domain positions at which the synchronization signal and the master information block are to be transmitted. In addition, the method may include receiving by the user equipment from the base station, second information indicating a periodicity of transmission of the synchronization signal and the master information block. The periodicity indicated by the second information may be different from 40 ms.

公开(公告)号：US20200059852A1

公开(公告)日：2020-02-20

申请号：US16340059

申请日：2017-10-06

Applicant: KYOCERA CORPORATION

Inventor： Hiroyuki URABAYASHI ,  Kugo MORITA

IPC: H04W48/10 ,  H04W16/14 ,  H04J11/00

Abstract: A mobile communication system according to one embodiment comprises: a base station configured to transmit discovery reference signal in an unlicensed spectrum, and a radio terminal configured to receive the discovery reference signal in the unlicensed spectrum. The base station notifies the radio terminal of timing information indicating a timing at which the discovery reference signal is to be transmitted in the unlicensed spectrum.

公开(公告)号：US20200015280A1

公开(公告)日：2020-01-09

申请号：US16573799

申请日：2019-09-17

Applicant: KYOCERA Corporation

Inventor： Masato FUJISHIRO ,  Hiroyuki URABAYASHI ,  Hiroyuki ADACHI

IPC: H04W74/08 ,  H04W76/27 ,  H04W16/26 ,  H04W4/02 ,  H04W24/08

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.

公开(公告)号：US20200015279A1

公开(公告)日：2020-01-09

申请号：US16572977

申请日：2019-09-17

Applicant: KYOCERA Corporation

Inventor： Masato FUJISHIRO ,  Hiroyuki URABAYASHI

IPC: H04W74/08 ,  H04W4/70 ,  H04W74/00

Abstract: A communication control method comprises a step S1 of transmitting, by a eNB 200, a paging message to a UE 100 by using a first frequency channel included in a plurality of frequency channels, a step S2 of receiving, by the UE 100, the paging message, a step S3 of selecting, by the UE 100, a second frequency channel included in the plurality of frequency channels, and a step S4 of transmitting, by the UE 100, a random access signal for establishing connection with the eNB 200 by using the second frequency channel. The paging message includes channel identification information used for selecting the second frequency channel. In the step S3, the UE 100 is configured to select the second frequency channel based on the channel identification information included in the paging message.

公开(公告)号：US20190274187A1

公开(公告)日：2019-09-05

申请号：US16319846

申请日：2017-07-19

Applicant: KYOCERA Corporation

Inventor： Hiroyuki URABAYASHI ,  Mayumi KOMURA ,  Chiharu YAMAZAKI

IPC: H04W88/02 ,  H04W72/04 ,  H04W72/14 ,  H04W16/14 ,  H04W76/27 ,  H04W74/08

Abstract: A radio terminal according to one embodiment comprises a controller configured to transmit a physical uplink shared channel to a base station by an interlace mapping using a plurality of resource blocks distributed on a frequency axis while overlapping on a time axis. The controller receives, from the base station, control channel information on a time-frequency resource used for transmitting the physical uplink control channel. The controller stops transmission in a specific resource block corresponding to the time-frequency resource from among the plurality of resource blocks, based on the control channel information.

公开(公告)号：US20190274131A1

公开(公告)日：2019-09-05

申请号：US16320249

申请日：2017-07-25

Applicant: KYOCERA Corporation

Inventor： Chiharu YAMAZAKI ,  Hiroyuki URABAYASHI

IPC: H04W72/04 ,  H04L1/16

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.

公开(公告)号：US20190260500A1

公开(公告)日：2019-08-22

申请号：US16402401

申请日：2019-05-03

Applicant: KYOCERA Corporation

Inventor： Masato FUJISHIRO ,  Chiharu YAMAZAKI ,  Hiroyuki URABAYASHI ,  Noriyoshi FUKUTA ,  Naohisa MATSUMOTO

IPC: H04L1/00 ,  H04W72/04 ,  H04L5/00 ,  H04W16/14

Abstract: 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.

公开(公告)号：US20190045492A1

公开(公告)日：2019-02-07

申请号：US16145599

申请日：2018-09-28

Applicant: KYOCERA CORPORATION

Inventor： Hiroyuki URABAYASHI ,  Chiharu YAMAZAKI ,  Kugo MORITA ,  Fangwei TONG

IPC: H04W72/04 ,  H04W72/12 ,  H04W74/08

CPC classification number: H04W72/042 ,  H04L5/0007 ,  H04L5/0053 ,  H04L5/0058 ,  H04W72/0446 ,  H04W72/1289 ,  H04W74/0833

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.

公开(公告)号：US20190037600A1

公开(公告)日：2019-01-31

申请号：US16140222

申请日：2018-09-24

Applicant: KYOCERA CORPORATION

Inventor： Hiroyuki URABAYASHI

IPC: H04W74/08 ,  H04W16/14 ,  H04W72/14 ,  H04W76/27

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.

公开(公告)号：US20180191483A1

公开(公告)日：2018-07-05

申请号：US15904566

申请日：2018-02-26

Applicant: KYOCERA CORPORATION

Inventor： Chiharu YAMAZAKI ,  Kugo MORITA ,  Masato FUJISHIRO ,  Hiroyuki URABAYASHI ,  Mayumi KOMURA

IPC: H04L5/14 ,  H04W72/04 ,  H04W74/08

Abstract: A radio terminal according to one embodiment comprises a controller configured to perform radio communication in a time division duplex system, with a base station. The controller is configured to receive a downlink radio signal from the base station; and transmit to the base station, response information indicating whether reception of the downlink radio signal is successful, wherein the response information is transmitted by using an uplink radio resource different from an uplink control channel resource even if the uplink radio resource is not allocated for data transmission from the base station.