公开(公告)号：US20230080014A1

公开(公告)日：2023-03-16

申请号：US18057033

申请日：2022-11-18

Applicant: KYOCERA Corporation

Inventor： Masato FUJISHIRO ,  Henry CHANG

IPC: H04W36/00

Abstract: A communication control method is used in a cellular communication system. The communication control method includes receiving, by a communication apparatus, from a relay node, a failure occurrence notification indicating occurrence of a failure in a backhaul link between the relay node and a parent node of the relay node, and starting, by the communication apparatus, a timer defining a time to wait for recovery from the failure in response to receiving the failure occurrence notification.

公开(公告)号：US20230017794A1

公开(公告)日：2023-01-19

申请号：US17934881

申请日：2022-09-23

Applicant: KYOCERA Corporation

Inventor： Masato FUJISHIRO

IPC: H04W76/30

Abstract: A communication control method is a method using a relay user equipment relaying communication between a base station and a remote user equipment. The communication control method includes establishing a connection between the remote user equipment and the relay user equipment, and performing a random access procedure establishing a connection between the remote user equipment and the base station. The performing the random access procedure includes a proxy operation where the relay user equipment, instead of the remote user equipment, performs at least a part of an operation to be performed by a Medium Access Control (MAC) layer in the random access procedure.

公开(公告)号：US20220408352A1

公开(公告)日：2022-12-22

申请号：US17822371

申请日：2022-08-25

Applicant: KYOCERA Corporation

Inventor： Masato FUJISHIRO

IPC: H04W48/18 ,  H04W48/10

Abstract: A communication control method includes transmitting, by a user equipment connecting to a first base station belonging to a non-public cellular network, to the first base station, a message for the user equipment to perform connection switching from the non-public cellular network to a public cellular network, and performing, by the first base station, control for the connection switching based on the message received from the user equipment.

公开(公告)号：US20220287004A1

公开(公告)日：2022-09-08

申请号：US17825668

申请日：2022-05-26

Applicant: KYOCERA Corporation

Inventor： Masato FUJISHIRO

IPC: H04W68/02 ,  H04W8/22

Abstract: A user equipment according to an aspect is registered with a first mobile network by using a first subscriber identity module (SIM) and registered with a second mobile network using a second SIM. The user equipment includes a processor. The processor executes a process of receiving, from the first mobile network, configuration information for configuring either a non-execution timing for not executing downlink transmission from the first mobile network to the user equipment or an execution timing for executing the downlink transmission. The processor executes a process of transmitting, to the second mobile network, identification information for identifying a timing configured according to the configuration information.

公开(公告)号：US20220264665A1

公开(公告)日：2022-08-18

申请号：US17661433

申请日：2022-04-29

Applicant: KYOCERA Corporation

Inventor： Masato FUJISHIRO

IPC: H04W76/10 ,  H04W8/26 ,  H04W16/32 ,  H04W48/08

Abstract: A base station, communication control method used in a base station, and mobile communication system including a base station transmit a handover request message for handing over a wireless communication apparatus having a RRC connection with the base station to another base station. The handover message includes an Integrated Access and Backhaul (IAB) indication indicating that the wireless communication apparatus is an IAB node having a user equipment function and a base station function.

公开(公告)号：US20220264655A1

公开(公告)日：2022-08-18

申请号：US17736337

申请日：2022-05-04

Applicant: KYOCERA Corporation

Inventor： Masato FUJISHIRO ,  Henry CHANG

IPC: H04W74/08 ,  H04W72/04

Abstract: A communication control method used in a user equipment, a user equipment, an apparatus for controlling a user equipment, and a base station that communicates with user equipment. The user equipment performs a predetermined data transmission in which it transmits uplink user data in an RRC idle state. When the user equipment is in an RRC connected state, it transmits an RRC message to a base station indicating that the user equipment is interested to perform the predetermined data transmission after transitioning to RRC idle mode. The base station receives, from user equipment when the user equipment is in an RRC connected state, the RRC message indicating that the user equipment is interested to perform the predetermined data transmission after transitioning to RRC idle mode.

公开(公告)号：US20220264400A1

公开(公告)日：2022-08-18

申请号：US17735713

申请日：2022-05-03

Applicant: KYOCERA Corporation

Inventor： Masato FUJISHIRO ,  Henry CHANG

IPC: H04W36/00 ,  H04W36/30 ,  H04W36/12

Abstract: A communication control method using a wireless relay apparatus connected to an upper apparatus via a backhaul link includes, in a case that a backhaul link of the wireless relay apparatus fails to be recovered, by the wireless relay apparatus, executing a first process for re-establishing a backhaul link of a lower wireless relay apparatus connected to the wireless relay apparatus by using a first message of a BAP layer of the wireless relay apparatus; and executing a second process for re-establishing or releasing an access link of a user equipment connected to the wireless relay apparatus by using a second message of a layer different from the BAP layer.

公开(公告)号：US20220232593A1

公开(公告)日：2022-07-21

申请号：US17711389

申请日：2022-04-01

Applicant: KYOCERA Corporation

Inventor： Masato FUJISHIRO ,  Henry CHANG

IPC: H04W72/12

Abstract: A communication control method executed in a relay apparatus comprising a base station function processor, and a user equipment function processor, the communication control method including: receiving, by a MAC layer of the base station function processor, from the lower apparatus, a first buffer state report, notifying, by the MAC layer of the base station function processor, a MAC layer of the user equipment function processor, of an amount of first untransmitted upstream data; considering, by the MAC layer of the user equipment function processor, the amount of first untransmitted upstream data notified to be a part of an amount of upstream data queued in a MAC layer of the relay apparatus to calculate an amount of second untransmitted upstream data of the relay apparatus; and transmitting, by the MAC layer of the user equipment function processor, a second buffer state report.

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.