公开(公告)号：US20180234855A1

公开(公告)日：2018-08-16

申请号：US15751090

申请日：2016-08-05

Applicant: KYOCERA CORPORATION

Inventor： Naohisa MATSUMOTO ,  Hiroyuki URABAYASHI ,  Kugo MORITA ,  Hiroyuki ADACHI

IPC: H04W16/14 ,  H04W74/08 ,  H04W74/00

Abstract: A base station (eNB 200-1) operated in a specific frequency band shared by a plurality of operators or a plurality of communication systems transmits, to another base station (eNB 200-2) operated in the specific frequency band, transmission request information requesting transmission of a predetermined signal for stopping transmission of an interference signal by an interference source (UE 100-2) causing interference to a radio terminal (UE 100-1) connected to the base station.

公开(公告)号：US20180077699A1

公开(公告)日：2018-03-15

申请号：US15810431

申请日：2017-11-13

Applicant: KYOCERA CORPORATION

Inventor： Naohisa MATSUMOTO ,  Hiroyuki URABAYASHI ,  Kugo MORITA ,  Chiharu YAMAZAKI

IPC: H04W72/04 ,  H04L1/18 ,  H04W24/10

CPC classification number: H04W72/0413 ,  H04L1/1812 ,  H04L1/1887 ,  H04W16/14 ,  H04W24/10 ,  H04W72/042 ,  H04W72/0446

Abstract: A user terminal according to an embodiment transmits uplink data to a base station using an unlicensed band. The user terminal includes a controller configured to, if uplink data transmission is started from a middle of a subframe according to a monitoring result of the unlicensed band, perform processing of transmitting a specific signal being different from the uplink data, at a beginning of the uplink data.

公开(公告)号：US20180070217A1

公开(公告)日：2018-03-08

申请号：US15808730

申请日：2017-11-09

Applicant: KYOCERA CORPORATION

Inventor： Kugo MORITA ,  Hiroyuki ADACHI ,  Noriyoshi FUKUTA

IPC: H04W4/06 ,  H04W52/02 ,  H04W8/00 ,  H04L29/08 ,  H04W56/00 ,  H04W76/02 ,  H04W4/00

CPC classification number: H04W4/06 ,  H04L12/1881 ,  H04L67/104 ,  H04W4/70 ,  H04W8/005 ,  H04W28/0215 ,  H04W52/0216 ,  H04W52/0219 ,  H04W56/0015 ,  H04W72/10 ,  H04W72/1242 ,  H04W76/14 ,  Y02D70/00 ,  Y02D70/1242 ,  Y02D70/1262 ,  Y02D70/164 ,  Y02D70/21

Abstract: D2D communication is appropriately controlled even in an environment in which a second user terminal inside the coverage and a first user terminal outside the coverage both exist. The first user terminal directly receives from the second user terminal device-to-device (D2D) synchronization information including coverage information that indicates that the second user terminal is in the coverage area, determines, based on the coverage information, whether the second user terminal is in the coverage area, selects the second user terminal as a synchronization reference of the first user terminal in response to determining that the second user terminal is in the coverage area, and receives usable resource information broadcasted from the second user terminal that becomes the synchronization reference, the usable resource information indicating D2D usable resources notified from a base station to the second user terminal by broadcast signaling.

公开(公告)号：US20180048986A1

公开(公告)日：2018-02-15

申请号：US15726176

申请日：2017-10-05

Applicant: KYOCERA CORPORATION

Inventor： Hiroyuki ADACHI ,  Kugo MORITA

IPC: H04W4/00 ,  H04W88/04 ,  H04W8/00 ,  H04W72/02 ,  H04W92/18 ,  H04W76/02

CPC classification number: H04W4/70 ,  H04W8/00 ,  H04W8/005 ,  H04W8/065 ,  H04W72/02 ,  H04W76/14 ,  H04W88/04 ,  H04W92/18

Abstract: A radio terminal according to an embodiment comprises: a controller configured to execute processing of establishing connection with a network for relaying using a Device to Device (D2D) proximity service; a transmitter configured to transmit a discovery message for the relaying, after the connection is established; and a receiver configured to receive a request message from another radio terminal that has received the discovery message, wherein the request message includes an identifier of the another radio terminal. The controller executes control of transmitting the identifier of the another radio terminal, to a network apparatus included in an Evolved Packet Core (EPC), as an identifier of a remote node to which data is relayed by the relaying. The controller executes control of further transmitting the identifier of the another radio terminal to the network apparatus, based on non-reception of a predetermined message from the another radio terminal.

公开(公告)号：US20180027553A1

公开(公告)日：2018-01-25

申请号：US15547869

申请日：2016-02-05

Applicant: KYOCERA CORPORATION

Inventor： Naohisa MATSUMOTO ,  Noriyoshi FUKUTA ,  Kugo MORITA

IPC: H04W72/04 ,  H04W16/14 ,  H04W72/08

CPC classification number: H04W76/19 ,  H04L5/0032 ,  H04W16/14 ,  H04W16/32 ,  H04W36/0027 ,  H04W68/00 ,  H04W72/042 ,  H04W72/0446 ,  H04W72/082 ,  H04W76/10 ,  H04W76/15 ,  H04W76/20 ,  H04W76/30 ,  H04W88/08 ,  H04W88/18 ,  H04W92/12

Abstract: A user terminal according to a first aspect is used in a mobile communication system. The user terminal comprises: a receiver configured to receive, from a base station, candidate timing information indicating candidate timings of an uplink transmission on an unlicensed band channel that is a frequency channel of an unlicensed band; a controller configured to determine, by monitoring the unlicensed band channel, a transmission timing at which the uplink transmission to the base station is performed, from the candidate timings indicated by the candidate timing information; and a transmitter configured to transmit, at the transmission timing, uplink data via the unlicensed band channel to the base station.

公开(公告)号：US20170374593A1

公开(公告)日：2017-12-28

申请号：US15700529

申请日：2017-09-11

Applicant: KYOCERA CORPORATION

Inventor： Yushi NAGASAKA ,  Masato FUJISHIRO ,  Kugo MORITA

IPC: H04W36/22 ,  H04W36/00 ,  H04W36/36 ,  H04W36/14 ,  H04W84/12 ,  H04W84/04

CPC classification number: H04W36/22 ,  H04W36/0022 ,  H04W36/0083 ,  H04W36/14 ,  H04W36/32 ,  H04W36/36 ,  H04W84/042 ,  H04W84/12

Abstract: A user terminal, method, and apparatus receive an offload command instructing an offload from a cellular base station, the offload steering traffic from the cellular base station to a wireless local area network (WLAN) access point being while maintaining a connection between the user terminal and cellular base station. An attempt is made to connect to the WLAN access point in response to receiving the offload command, and in response to the attempt failing, determine whether a reason for the failure of connection to the WLAN access point is a first reason being an issue of a radio link between the user terminal and the WLAN access point or a second reason being an internal issue of the user terminal. A failure indication is transmitted to the base station in response to a connection failure indicates connection failure and indicates whether the reason is the first or second reason.

公开(公告)号：US20170325100A1

公开(公告)日：2017-11-09

申请号：US15660676

申请日：2017-07-26

Applicant: KYOCERA CORPORATION

Inventor： Hiroyuki URABAYASHI ,  Kugo MORITA ,  Noriyoshi FUKUTA ,  Naohisa MATSUMOTO

IPC: H04W16/14 ,  H04W48/16 ,  H04W72/04

CPC classification number: H04W16/14 ,  H04W48/16 ,  H04W72/0413

Abstract: A base station according to an embodiment has a first cell in a licensed band and a second cell in an unlicensed band. The base station comprises: controller configured to execute control to transmit a discovery reference signal in the second cell. The controller executes: control to confirm whether or not there is an available channel in the unlicensed band, before transmitting the discovery reference signal; and control to transmit the discovery reference signal in the available channel in the unlicensed band. The discovery reference signal includes a cell-specific reference signal, a primary synchronization signal, a secondary synchronization signal, and a channel-state-information reference signal.

公开(公告)号：US20170318514A1

公开(公告)日：2017-11-02

申请号：US15650620

申请日：2017-07-14

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 user terminal, user terminal chipset, and method including receiving, from a cellular base station included in a cellular radio access network (RAN), parameters for an offload from the cellular RAN to a wireless local area network (LAN), and performs an access network selection between the cellular RAN and the wireless LAN based on the parameters. Parameters include a first threshold to be compared with a cellular signal strength of the cellular RAN, a second threshold to be compared with a wireless LAN signal strength of the wireless LAN, and a third threshold to be compared with a load of the wireless LAN. Performing the access network selection includes selecting the wireless LAN to perform the offload, in response to the cellular signal strength being lower than the first threshold, the wireless LAN signal strength being higher than the second threshold, and the load being lower than the third threshold.

公开(公告)号：US20170303179A1

公开(公告)日：2017-10-19

申请号：US15511652

申请日：2015-09-24

Applicant: KYOCERA CORPORATION

Inventor： Katsuhiro MITSUI ,  Masato FUJISHIRO ,  Kugo MORITA ,  Susumu KASHIWASE ,  Yushi NAGASAKA

IPC: H04W36/24 ,  H04W36/14 ,  H04W36/38 ,  H04W36/22 ,  H04W88/08 ,  H04W88/06

CPC classification number: H04W36/245 ,  H04W36/00837 ,  H04W36/14 ,  H04W36/22 ,  H04W36/38 ,  H04W84/12 ,  H04W88/06 ,  H04W88/08

Abstract: A radio base station according to an embodiment constitutes a mobile communication network. The radio base station comprises: a controller configured to measure a stay time for which a radio terminal has stayed on a wireless LAN. The stay time is a period from when a first process through which the radio terminal switches a waiting destination or a connection destination from the mobile communication network to the wireless LAN is performed to when a second process through which the radio terminal switches the waiting destination or the connection destination from the wireless LAN to the mobile communication network is performed.

公开(公告)号：US20170238357A1

公开(公告)日：2017-08-17

申请号：US15583102

申请日：2017-05-01

Applicant: KYOCERA CORPORATION

Inventor： Kugo MORITA ,  Chiharu YAMAZAKI

IPC: H04W76/02 ,  H04W72/12 ,  H04W56/00 ,  H04W74/08 ,  H04W72/04

CPC classification number: H04W76/14 ,  H04W52/0261 ,  H04W56/0015 ,  H04W72/02 ,  H04W72/0486 ,  H04W72/1263 ,  H04W74/0833 ,  H04W92/18 ,  Y02D70/00 ,  Y02D70/1262 ,  Y02D70/164 ,  Y02D70/21 ,  Y02D70/24

Abstract: A mobile communication system comprises a first user terminal having a scheduling function of assigning a radio resource used for the D2D communication. When the scheduling function is enabled, the first user terminal broadcasts periodically or aperiodically a message including identification information indicating that the first user terminal is a scheduling terminal that performs the assignment of the radio resource.