公开(公告)号：US10609602B2

公开(公告)日：2020-03-31

申请号：US15426775

申请日：2017-02-07

Applicant: Mitsubishi Electric Corporation

Inventor： Miho Maeda ,  Mitsuru Mochizuki ,  Shinsuke Uga ,  Noriyuki Fukui ,  Yasushi Iwane

IPC: H04W36/00 ,  H04W88/04 ,  H04W76/10 ,  H04W84/00 ,  H04W36/32 ,  H04W36/06 ,  H04W36/08 ,  H04W84/04 ,  H04W16/26

Abstract: A mobile communication system includes a movable user equipment device, a plurality of base station devices configured to perform radio communication with the user equipment device, and a relay device movably configured to relay radio communications between the user equipment device and the base station devices. In a handover process of switching a base station device to be connected with the relay device from a base station device being a moving source to a base station device being a moving destination along with moving of the relay device, the base station device being a moving source selects the base station device being a moving destination from base station devices other than a base station device that does not have a function supporting the relay device, and performs the handover process such that the relay device is connected to the selected base station device.

公开(公告)号：US12185239B2

公开(公告)日：2024-12-31

申请号：US17338034

申请日：2021-06-03

Applicant: Mitsubishi Electric Corporation

Inventor： Mitsuru Mochizuki ,  Noriyuki Fukui ,  Haruka Suzuki

IPC: H04W52/02 ,  H04W16/32 ,  H04W48/02 ,  H04W48/08 ,  H04W48/16 ,  H04W24/02 ,  H04W84/04

Abstract: A communication system capable of preventing unnecessary switching of an energy saving cell between a normal operation state and an energy saving state. An energy saving cell (ES cell) is in a dormant state that is the energy saving state. In this case, when being notified of a wake-up request message from a communication terminal device (UE), the ES cell executes access restriction control to judge whether the UE can access its own cell. If judging that the UE can access its own cell, the ES cell switches on its own cell and shifts from the dormant state to an active state that is the normal operation state.

公开(公告)号：US11743817B2

公开(公告)日：2023-08-29

申请号：US17113445

申请日：2020-12-07

Applicant: MITSUBISHI ELECTRIC CORPORATION

Inventor： Yasuhiro Onaka ,  Miho Maeda ,  Mitsuru Mochizuki ,  Taisei Suemitsu ,  Noriyuki Fukui

IPC: H04W24/04 ,  H04W36/22 ,  H04W52/02 ,  H04W92/20 ,  H04W48/00 ,  H04W36/16 ,  H04W24/02 ,  H04W52/04 ,  H04W72/0446 ,  H04W16/08 ,  H04W88/08

CPC classification number: H04W52/0206 ,  H04W24/02 ,  H04W36/165 ,  H04W48/00 ,  H04W52/04 ,  H04W72/0446 ,  H04W92/20 ,  H04W16/08 ,  H04W36/22 ,  H04W88/08 ,  Y02D30/70

Abstract: A communication system includes a base station configuring an energy saving cell (ES cell) and a base station configuring a compensation cell (Comp cell). The ES cell is switchable between a switch-on state and a switch-off state. The Comp cell compensates for the coverage of the ES cell when the ES cell is in the switch-off state. Before the Comp cell starts compensating for the coverage, for example, before the ES cell decides to switch itself off in Step ST2101, in Step ST2201 for example, the base station configuring the ES cell notifies the UE being connected with the ES cell of the information about a Comp cell, for example, a Comp cell list.

公开(公告)号：US11502794B2

公开(公告)日：2022-11-15

申请号：US16756622

申请日：2018-11-02

Applicant: Mitsubishi Electric Corporation

Inventor： Mitsuru Mochizuki ,  Tadahiro Shimoda ,  Noriyuki Fukui ,  Fumihiro Hasegawa

IPC: H04W72/08 ,  H04L5/00 ,  H04W72/04

Abstract: Provided is a communication system, etc. with low latency and high reliability, under New Radio (NR). A communication system includes a communication terminal device, and a plurality of nodes configured to be connected to the communication terminal device for radio communication and to provide a split bearer for the communication terminal device. The communication terminal device is configured to perform uplink transmission to an uplink transmission node among the plurality of nodes. The uplink transmission node is determined by an uplink transmission node determination process in which a node that provides the uplink transmission from the communication terminal device with lower latency among the plurality of nodes is determined as the uplink transmission node.

公开(公告)号：US11265137B2

公开(公告)日：2022-03-01

申请号：US16326645

申请日：2016-09-27

Applicant: MITSUBISHI ELECTRIC CORPORATION

Inventor： Noriyuki Fukui

IPC: H04L5/02 ,  H04B7/06 ,  H04L1/00 ,  H04L1/08 ,  H04L5/00

Abstract: A base station includes: a controller that performs control to transmit a plurality of signals that is common to each terminal to a terminal located in a coverage area of its own base station by transmitting the plurality of signals at the same timing while frequency multiplexing the plurality of signals on a frequency domain in an area where the signals can be transmitted simultaneously using a beam within the coverage area, and transmitting the plurality of signals a plurality of times while changing the area; and an antenna that transmits the plurality of signals area by area while changing a direction of the beam under the control of the controller.

公开(公告)号：US10764889B2

公开(公告)日：2020-09-01

申请号：US16069285

申请日：2017-01-27

Applicant: Mitsubishi Electric Corporation

Inventor： Mitsuru Mochizuki ,  Noriyuki Fukui

IPC: H04W72/04 ,  H04L12/26 ,  H04W76/27 ,  H04W16/32 ,  H04W48/16 ,  H04W52/02 ,  H04W72/02

Abstract: A communication system capable of a stable communication operation between a base station device and a communication terminal device. A UE is configured to communicate with an MeNB directly or through a SeNB. The UE is set to transmit, to the MeNB and the SeNB, transmission data addressed to the MeNB when an amount of the transmission data exceeds a predetermined threshold. The UE is set to transmit the transmission data not to the SeNB but to the MeNB when the amount is smaller than or equal to the threshold. The threshold is changed so that the transmission data is transmitted to the MeNB and the SeNB, when the SeNB is set to communicate with the UE with radio resources periodically allocated and the amount of the transmission data is smaller than or equal to the threshold.

公开(公告)号：US10652818B2

公开(公告)日：2020-05-12

申请号：US15655268

申请日：2017-07-20

Applicant: Mitsubishi Electric Corporation

Inventor： Mitsuru Mochizuki ,  Noriyuki Fukui ,  Haruka Suzuki

IPC: H04W52/02 ,  H04W48/02 ,  H04W16/32 ,  H04W48/08 ,  H04W48/16 ,  H04W24/02 ,  H04W84/04

Abstract: A communication system capable of preventing unnecessary switching of an energy saving cell between a normal operation state and an energy saving state. An energy saving cell (ES cell) is in a dormant state that is the energy saving state. In this case, when being notified of a wake-up request message from a communication terminal device (UE), the ES cell executes access restriction control to judge whether the UE can access its own cell. If judging that the UE can access its own cell, the ES cell switches on its own cell and shifts from the dormant state to an active state that is the normal operation state.

公开(公告)号：US20190289663A1

公开(公告)日：2019-09-19

申请号：US16432148

申请日：2019-06-05

Applicant: Mitsubishi Electric Corporation

Inventor： Mitsuru Mochizuki ,  Kuniyuki Suzuki ,  Masayuki Nakazawa ,  Noriyuki Fukui ,  Haruka Nozawa

IPC: H04W76/28 ,  H04W48/20 ,  H04W48/00 ,  H04W48/16 ,  H04W8/02 ,  H04W52/02

Abstract: A narrow-bandwidth terminal device performs radio communication at a bandwidth narrower than a system bandwidth. The narrow-bandwidth terminal device in an idle state camps on a cell, and performs discontinuous reception of a signal transmitted from the cell. The terminal device also determines a reception condition of the signal, for example, whether the signal can be received. When it is determined that the signal cannot be received, the narrow-bandwidth terminal device moves out of a coverage area of the cell while continuing to perform the discontinuous reception. When it is determined that a discontinuous reception timer has been completed, the narrow-bandwidth terminal device continues to perform the discontinuous reception.

公开(公告)号：US20180184369A1

公开(公告)日：2018-06-28

申请号：US15902667

申请日：2018-02-22

Applicant: MITSUBISHI ELECTRIC CORPORATION

Inventor： Yasuhiro ONAKA ,  Miho Maeda ,  Mitsuru Mochizuki ,  Taisei Suemitsu ,  Noriyuki Fukui

IPC: H04W52/02 ,  H04W72/04 ,  H04W52/04 ,  H04W92/20

CPC classification number: H04W52/0206 ,  H04W16/08 ,  H04W24/02 ,  H04W36/165 ,  H04W36/22 ,  H04W48/00 ,  H04W52/04 ,  H04W72/0446 ,  H04W88/08 ,  H04W92/20 ,  Y02D70/00 ,  Y02D70/1222 ,  Y02D70/1226 ,  Y02D70/1242 ,  Y02D70/1262 ,  Y02D70/1264 ,  Y02D70/21 ,  Y02D70/24

Abstract: A communication system includes a base station configuring an energy saving cell (ES cell) and a base station configuring a compensation cell (Comp cell). The ES cell is switchable between a switch-on state and a switch-off state. The Comp cell compensates for the coverage of the ES cell when the ES cell is in the switch-off state. Before the Comp cell starts compensating for the coverage, for example, before the ES cell decides to switch itself off in Step ST2101, in Step ST2201 for example, the base station configuring the ES cell notifies the UE being connected with the ES cell of the information about a Comp cell, for example, a Comp cell list.

公开(公告)号：US09955363B2

公开(公告)日：2018-04-24

申请号：US14767501

申请日：2014-02-13

Applicant: Mitsubishi Electric Corporation

Inventor： Mitsuru Mochizuki ,  Miho Maeda ,  Shinsuke Uga ,  Noriyuki Fukui

IPC: H04W40/00 ,  H04W16/32 ,  H04W16/08 ,  H04W52/02

CPC classification number: H04W16/32 ,  H04W16/08 ,  H04W52/0206 ,  Y02B70/30 ,  Y02B70/32 ,  Y02D70/00 ,  Y02D70/1222 ,  Y02D70/1224 ,  Y02D70/1226 ,  Y02D70/1242 ,  Y02D70/1244 ,  Y02D70/1246 ,  Y02D70/1262 ,  Y02D70/1264 ,  Y02D70/24

Abstract: A communication system is provided that, if a large number of small cells are installed, is capable of configuring an operation suitable for small cells through simple operation and administration. If a small cell installed in Step ST1401 judges in Step ST1403 that a coverage macro cell, which includes the small cell in the coverage of the coverage macro cell, is present as a result of neighbor cell search in Step ST1402, notifies the coverage macro cell and another neighbor cell of its own capability in Steps ST1404 and 1405. The coverage macro cell selects a configuration parameter suitable for the capability of the small cell in Step ST1406 and notifies the small cell in Step ST1407. The small cell recognizes an operation mode configured by the coverage macro cell from the configuration parameter notified from the coverage macro cell, and then, starts operating in the operation mode.