公开(公告)号：US20220225202A1

公开(公告)日：2022-07-14

申请号：US17711411

申请日：2022-04-01

Applicant: KYOCERA Corporation

Inventor： Masato FUJISHIRO

IPC: H04W36/30 ,  H04W74/08 ,  H04W36/08

Abstract: A user equipment according to an aspect includes a processor. The processor executes: processing of attempting, in a predetermined period, reception of a reference signal periodically transmitted from a cell in an unlicensed band; processing of counting at least one of the number of unsuccessful receptions of the reference signal in the predetermined period and the number of successful receptions of the reference signal in the predetermined period; and processing of performing mobility control of the user equipment, based on the counted number.

公开(公告)号：US20220159771A1

公开(公告)日：2022-05-19

申请号：US17665986

申请日：2022-02-07

Applicant: KYOCERA Corporation

Inventor： Masato FUJISHIRO

IPC: H04W76/19 ,  H04L5/00

Abstract: A communication control method is executed in a relay apparatus included in a plurality of relay apparatuses in a system provided with an upstream path formed with the plurality of relay apparatuses between a user equipment and a first donor apparatus. The communication control method includes transferring, in the upstream path, data received from a lower apparatus lower than the relay apparatus to a first upper apparatus higher than the relay apparatus, buffering data having yet to be transmitted to the first upper apparatus, re-establishing, when a failure occurs in a backhaul link established between the relay apparatus and the first upper apparatus, a backhaul link of the relay apparatus with a second upper apparatus, and determining whether to transfer the buffered data to the second upper apparatus based on whether a second donor apparatus managing the second upper apparatus is identical to the first donor apparatus.

公开(公告)号：US20220159485A1

公开(公告)日：2022-05-19

申请号：US17666068

申请日：2022-02-07

Applicant: KYOCERA Corporation

Inventor： Masato FUJISHIRO ,  Henry CHANG

IPC: H04W24/04

Abstract: A communication control method according to a first aspect is a method used in a mobile communication system configured to form at least one communication path with a plurality of relay apparatuses between a user equipment and a donor apparatus. The communication control method includes: detecting, by a relay apparatus included in the plurality of relay apparatuses, a failure of a backhaul link between an upper apparatus higher than the relay apparatus and the relay apparatus; in response to the detecting of the failure in the backhaul link, transmitting, by the relay apparatus, a failure notification related to the failure of the backhaul link to a lower apparatus lower than the relay apparatus; and by the lower apparatus, in response to receiving the failure notification from the relay apparatus, stopping uplink transmission to the relay apparatus.

公开(公告)号：US20220141834A1

公开(公告)日：2022-05-05

申请号：US17435673

申请日：2020-03-27

Applicant: Kyocera Corporation

Inventor： Henry CHANG ,  Masato FUJISHIRO

IPC: H04W72/12 ,  H04W4/46 ,  H04L12/18

Abstract: The methods, devices, and systems discussed herein describe four different mechanisms (e.g., solutions) to assist a leader of a group of wireless communication devices in deciding when to switch between groupcast and unicast transmissions. In the first solution, the group leader may decide to initiate groupcast or unicast without considering the design of the Access Stratum (AS) layer link management. In the second solution, the group leader can determine whether to initiate unicast transmission based, at least partially, on feedback messages received from one or more other members of the group. In the third solution, the group leader has the option to simultaneously transmit groupcast and unicast transmissions towards the same user equipment devices (UEs). In the fourth solution, the group leader indicates to the groupcast-receiving UEs that the transmission is about to be switched from groupcast to unicast.

公开(公告)号：US20220070926A1

公开(公告)日：2022-03-03

申请号：US17454436

申请日：2021-11-10

Applicant: KYOCERA Corporation

Inventor： Masato FUJISHIRO

IPC: H04W74/08 ,  H04W16/14

Abstract: A communication control method is a method performed in a user equipment. The communication control method includes the steps of: when a random access procedure is performed for a base station operated in an unlicensed band in which LBT before transmission is required, transmitting a message to the base station and then receiving a response to the message from the base station; and controlling the number of transmission occasions that allow the message to be transmitted before the response is received. The controlling of the number of the transmission occasions includes, when a failure occurs in an n-th (n≥1) random access procedure due to a failure of the LBT, causing the number of the transmission occasions in an (n+1)-th random access procedure to be larger than the number of the transmission occasions in the n-th random access procedure.

公开(公告)号：US20210352542A1

公开(公告)日：2021-11-11

申请号：US17277477

申请日：2019-09-10

Applicant: Kyocera Corporation

Inventor： Henry CHANG ,  Masato FUJISHIRO

IPC: H04W36/00

Abstract: Cell selection in a New Radio-Unlicensed Standalone (NR-U SA) communication system is managed by allowing UE devices to avoid measurements of frequencies that are occupied. A base station (gNB) may indicate to the UE device frequencies that can be skipped or may allow the UE device to skip frequencies for a temporary period after the frequencies have been determined to be occupied.

公开(公告)号：US20210274565A1

公开(公告)日：2021-09-02

申请号：US17323333

申请日：2021-05-18

Applicant: Kyocera Corporation

Inventor： Henry CHANG ,  Masato FUJISHIRO

IPC: H04W74/08 ,  H04W76/10 ,  H04B7/185

Abstract: An unmanned aerial vehicle (UAV) receives a set of Random Access preambles, determines its UAV status, and selects a Random Access preamble from the set of Random Access preambles. In some cases, the set of Random Access preambles are allocated for use by UAVs and are common to a plurality of neighboring cells. The UAV transmits the selected Random Access preamble to multiple neighboring cells. One of the neighboring cells that received the selected Random Access preamble transmits a Random Access Response to the UAV. The UAV determines which cell sent the Random Access Response, reselects to the cell that sent the Random Access Response, and transmits a Radio Resource Control (RRC) Connection Establishment Request to the reselected cell. Upon completion of a Random Access Channel (RACH) procedure, the reselected cell becomes the serving cell for the UAV.

公开(公告)号：US20210266865A1

公开(公告)日：2021-08-26

申请号：US17314914

申请日：2021-05-07

Applicant: KYOCERA Corporation

Inventor： Masato FUJISHIRO ,  Kugo MORITA ,  Henry CHANG

IPC: H04W68/06 ,  H04W76/27 ,  H04W76/28 ,  H04W8/08 ,  H04W68/02 ,  H04W68/00 ,  H04W48/18 ,  H04W52/02

Abstract: A user equipment and apparatus receive from a base station, configuration information configuring the user equipment to provide assistance information indicating a preference of the user equipment to leave RRC connected state, and transmit to the base station, assistance information indicating that a preferred RRC state of the user equipment is an RRC state in which an RRC connection is suspended. A base station transmits to a user equipment, configuration information configuring the user equipment to provide assistance information indicating a preference of the user equipment to leave RRC connected state, and receives from the user equipment, assistance information indicating that a preferred RRC state of the user equipment is an RRC state in which an RRC connection is suspended.

公开(公告)号：US20210160950A9

公开(公告)日：2021-05-27

申请号：US16186618

申请日：2018-11-12

Applicant: KYOCERA CORPORATION

Inventor： Masato FUJISHIRO ,  Noriyoshi FUKUTA ,  Henry CHANG

IPC: H04W76/27 ,  H04W72/12

Abstract: A radio terminal according to an embodiment is used in a mobile communication system. The radio terminal includes a controller configured to, if the radio terminal is in an RRC connected state, perform a predetermined function according to configuration parameters configured from a network. The controller is configured to invalidate at least a part of the configuration parameters in response to the transition of the radio terminal from the RRC connected state to a specific state. The specific state is a state in which signaling is reduced as compared with the RRC connected state and context information of the radio terminal is maintained in the network.

公开(公告)号：US20210092670A1

公开(公告)日：2021-03-25

申请号：US17114682

申请日：2020-12-08

Applicant: KYOCERA Corporation

Inventor： Masato FUJISHIRO

IPC: H04W48/10 ,  H04W72/00 ,  H04W48/14

Abstract: A user equipment, apparatus and method receives a first system information block (SIB) that is broadcast from a first cell and includes information necessary for accessing the first cell, receives a second SIB other than the first SIB from the first cell in response to a request transmitted by the user equipment for the second SIB, receives and stores in memory area information from the first cell, the area information indicating a predetermined area comprising a plurality of cells including the first cell where the second SIB is applicable, and when the user equipment camps on a second cell, receives information from the second cell indicating an area that the second cell belongs to. A determination is made as to whether to transmit a request for the second SIB to the second cell at least based on the stored area information and the information received from the second cell.