公开(公告)号：US09918318B2

公开(公告)日：2018-03-13

申请号：US14417405

申请日：2013-07-23

Applicant: KYOCERA CORPORATION

Inventor： Masato Fujishiro ,  Kugo Morita

IPC: H04W72/04 ,  H04W76/02 ,  H04W8/00 ,  H04W48/16

CPC classification number: H04W72/048 ,  H04W8/005 ,  H04W48/16 ,  H04W76/14

Abstract: In a mobile communication system, user data is communicated directly among a plurality of radio terminals without passing through a radio base station. The communication of user data directly performed among the plurality of radio terminals is performed by using a part of radio resources assigned to the mobile communication system. A D2D terminal included in the plurality of radio terminals notifies the radio base station of an identifier of a neighboring terminal located in the neighborhood of the D2D terminal, or the neighboring terminal notifies the radio base station of the identifier of the D2D terminal.

公开(公告)号：US09888511B2

公开(公告)日：2018-02-06

申请号：US15199348

申请日：2016-06-30

Applicant: KYOCERA CORPORATION

Inventor： Kugo Morita

IPC: H04W76/02 ,  H04W8/00 ,  H04W52/38 ,  H04W72/04 ,  H04W72/02 ,  H04W92/18 ,  H04W52/36

CPC classification number: H04W76/14 ,  H04W8/005 ,  H04W52/367 ,  H04W52/383 ,  H04W72/02 ,  H04W72/044 ,  H04W72/0446 ,  H04W72/0453 ,  H04W92/18

Abstract: A mobile communication system according to the present disclosure supports cellular communication in which a data path passes through a core network and D2D communication that is direct device-to-device communication in which a data path does not pass through the core network. The mobile communication system has a user terminal that performs a process of discovering a partner terminal in the D2D communication or performs the D2D communication. A plurality of radio resources that are the time-frequency resources that can be used for the process of discovering or the D2D communication consist of radio resources associated with transmission power used for the process of discovering or the D2D communication. The user terminal performs the process of discovering or the D2D communication on the basis of the transmission power associated with the radio resource used by the user terminal.

公开(公告)号：US09854618B2

公开(公告)日：2017-12-26

申请号：US15223890

申请日：2016-07-29

Applicant: KYOCERA CORPORATION

Inventor： Naohisa Matsumoto ,  Kugo Morita ,  Masato Fujishiro ,  Takahiro Saiwai

IPC: H04W28/04 ,  H04W76/02 ,  H04W72/04 ,  H04W8/00 ,  H04W72/02

CPC classification number: H04W76/14 ,  H04W8/005 ,  H04W72/02 ,  H04W72/0406 ,  H04W72/042

Abstract: A first user terminal according to an embodiment comprises: at least one processor and at least one memory coupled to the processor. The processor is configured to perform processes of: determining first radio resources to be used for transmitting control information, the control information indicating location of second radio resources to be used for transmitting data by direct Device-to-Device communication; and directly transmitting the same control information repeatedly to a second user terminal in each resource block included in the first control resources.

公开(公告)号：US20170367044A1

公开(公告)日：2017-12-21

申请号：US15691583

申请日：2017-08-30

Applicant: Kyocera Corporation

Inventor： Masato Fujishiro ,  Shingo Katagiri ,  Hiroyuki Adachi ,  Kugo Morita

IPC: H04W52/02 ,  H04W4/14 ,  H04W4/00 ,  H04W76/04 ,  H04W68/02 ,  H04W88/16 ,  H04W88/02 ,  H04W88/08

CPC classification number: H04W52/0209 ,  H04W4/14 ,  H04W4/70 ,  H04W28/14 ,  H04W52/0216 ,  H04W68/005 ,  H04W68/02 ,  H04W76/27 ,  H04W76/28 ,  H04W88/02 ,  H04W88/08 ,  H04W88/16 ,  Y02D70/00 ,  Y02D70/1262 ,  Y02D70/164 ,  Y02D70/21 ,  Y02D70/24

Abstract: A base station according to the present embodiment receives, if the radio terminal is in a connected mode, via a bearer between the base station and a serving gateway, downlink data addressed to the radio terminal, from the serving gateway, and includes a controller configured to transmit the downlink data to the radio terminal. The controller does not release but maintains the bearer, if the extended DRX operation is configured to the radio terminal, when the radio terminal transitions to the idle mode. The controller receives, even if the radio terminal is in the idle mode, from the serving gateway, the downlink data addressed to the radio terminal, via the bearer, and buffers the downlink data until the downlink data is transmitted to the radio terminal.

公开(公告)号：US09843970B2

公开(公告)日：2017-12-12

申请号：US14906401

申请日：2014-07-18

Applicant: KYOCERA CORPORATION

Inventor： Yushi Nagasaka ,  Kugo Morita

IPC: H04W36/00 ,  H04L5/00 ,  H04W56/00 ,  H04W72/04 ,  H04W36/08 ,  H04W74/08

CPC classification number: H04W36/0033 ,  H04L5/0035 ,  H04W36/0077 ,  H04W36/08 ,  H04W56/0005 ,  H04W72/042 ,  H04W74/0833

Abstract: A user terminal comprises: a controller configured to perform control of omitting transmission of a random access preamble signal to a target cell when a base station that manages the target cell receives an uplink signal from the user terminal by CoMP in which a plurality of cells including a source cell and the target cell cooperate with one another to perform communication before a handover procedure is performed.

公开(公告)号：US09826547B2

公开(公告)日：2017-11-21

申请号：US14767217

申请日：2014-02-18

Applicant: KYOCERA CORPORATION

Inventor： Masato Fujishiro ,  Kugo Morita ,  Chiharu Yamazaki

IPC: H04W72/12 ,  H04W8/00 ,  H04W88/02 ,  H04W88/08

CPC classification number: H04W72/1278 ,  H04W8/005 ,  H04W88/02 ,  H04W88/08

Abstract: A communication control method is used in a mobile communication system that supports D2D communication that is direct device-to-device communication in which a data path does not pass through a core network. The communication control method comprises: a step A of transmitting, by a first user terminal camping on a first cell, a radio signal that includes a serving cell identifier for identifying the first cell; a step B of transmitting, by a second user terminal camping on a second cell, the serving cell identifier included in the radio signal from the second user terminal to the second cell when the radio signal is received from the first user terminal; and a step C of sharing, by the first cell and the second cell, scheduling information for controlling the D2D communication performed by the first user terminal and the second user terminal, on the basis of the serving cell identifier received by the second cell from the second user terminal.

公开(公告)号：US09788250B2

公开(公告)日：2017-10-10

申请号：US15197586

申请日：2016-06-29

Applicant: KYOCERA CORPORATION

Inventor： Yushi Nagasaka ,  Henry Chang ,  Masato Fujishiro ,  Kugo Morita

IPC: H04W48/18 ,  H04W84/12 ,  H04W76/04 ,  H04W36/16 ,  H04W36/14 ,  H04W36/22 ,  H04H20/38 ,  H04L5/00 ,  H04W36/38 ,  H04L12/70 ,  H04W84/04 ,  H04W88/16

CPC classification number: H04W36/14 ,  H04H20/38 ,  H04L5/0051 ,  H04L2012/5641 ,  H04W36/22 ,  H04W36/38 ,  H04W48/18 ,  H04W84/045 ,  H04W84/12 ,  H04W88/16

Abstract: A communication control method for performing an offload from a cellular RAN to a wireless LAN, includes a step of performing, by a user terminal, a network selection operation to select an appropriate access network with which a traffic of the user terminal is exchanged, from the cellular RAN and the wireless LAN on the basis of determination parameters. The determination parameters comprises at least one of: a cellular network status that is a network status concerning the cellular RAN; a wireless LAN network status that is a network status concerning the wireless LAN; a cellular radio link status that is a radio link status between the cellular RAN and the user terminal; and a wireless LAN radio link status that is a radio link status between the wireless LAN and the user terminal.

公开(公告)号：US09749922B2

公开(公告)日：2017-08-29

申请号：US14761873

申请日：2014-01-17

Applicant: KYOCERA CORPORATION

Inventor： Henry Chang ,  Yushi Nagasaka ,  Kugo Morita ,  Fangwei Tong ,  Masato Fujishiro ,  Chiharu Yamazaki ,  Hiroyuki Adachi ,  Noriyoshi Fukuta

IPC: H04W36/22 ,  H04W48/18 ,  H04W48/06

CPC classification number: H04W36/22 ,  H04W48/06 ,  H04W48/18 ,  Y02D70/126 ,  Y02D70/14

Abstract: A communication control method is a method for performing an offload from a cellular RAN to a wireless LAN. The communication control method includes the steps of: transmitting a list which contains identifiers of wireless LAN access points included in the wireless LAN, by a cellular base station included in the cellular RAN; receiving the list, by a user terminal which has a cellular communication unit and a wireless LAN communication unit; and performing an operation related to the offload after detecting that the user terminal approaches a wireless LAN access point on the basis of the list, by the user terminal which exists in a cell of the cellular base station.

公开(公告)号：US09736727B2

公开(公告)日：2017-08-15

申请号：US15167441

申请日：2016-05-27

Applicant: KYOCERA CORPORATION

Inventor： Yushi Nagasaka ,  Masato Fujishiro ,  Hiroyuki Adachi ,  Kugo Morita ,  Chiharu Yamazaki ,  Henry Chang

IPC: H04W80/04 ,  H04W28/08 ,  H04W36/22 ,  H04W36/02 ,  H04W48/18 ,  H04W48/08 ,  H04W84/12 ,  H04W88/06

CPC classification number: H04W28/08 ,  H04W36/02 ,  H04W36/22 ,  H04W48/08 ,  H04W48/18 ,  H04W84/12 ,  H04W88/06

Abstract: A communication control method is a method for performing offload to transfer a traffic load of a cellular base station to an access point. The communication control method comprises a step of maintaining without releasing the first connection, by a user terminal that have established a first connection with the cellular base station, even when the offload is started after establishing a second connection with the access point; and a determining step of determining, by the user terminal, whether the offload is continued or canceled after the offload is started.

公开(公告)号：US09735848B2

公开(公告)日：2017-08-15

申请号：US14435537

申请日：2013-10-09

Applicant: KYOCERA CORPORATION

Inventor： Takahiro Saiwai ,  Chiharu Yamazaki ,  Kugo Morita ,  Fangwei Tong ,  Atsuhisa Inakoshi ,  Masato Fujishiro

IPC: H04K1/10 ,  H04L27/28 ,  H04B7/0456 ,  H04W74/00 ,  H04W72/10 ,  H04B7/06 ,  H04L5/00 ,  H04W72/12 ,  H04W24/10

CPC classification number: H04B7/0456 ,  H04B7/0617 ,  H04B7/063 ,  H04B7/0639 ,  H04L5/00 ,  H04L5/0023 ,  H04L5/0057 ,  H04W24/10 ,  H04W72/10 ,  H04W72/1226 ,  H04W74/006

Abstract: A mobile communication system performs downlink multi-antenna transmission by applying a precoder matrix that defines transmission directionality of downlink and a rank that defines number of signal sequences of the downlink. The mobile communication system comprises a user terminal that feeds back feedback information of a target frequency band, to a base station. The feedback information includes combinations of precoder matrix information indicating the precoder matrix and rank information indicating the rank.