公开(公告)号：US20200296738A1

公开(公告)日：2020-09-17

申请号：US16086039

申请日：2017-01-12

Applicant: NEC CORPORATION

Inventor： Masaki INOKUCHI ,  Kazushi MURAOKA

IPC: H04W72/12

Abstract: An apparatus (1 or 3) determines a device-to-device (D2D) radio resource to be allocated to one or more D2D transmissions from at least one remote terminal (1) to a first relay terminal (2) while considering a quality metric of an uplink from the first relay (2) terminal to a base station (3). In this way, for example, it is possible to contribute to avoiding inconsistency of performance between sidelink transmission from the remote terminal to the relay terminal and uplink transmission from the relay terminal to the base station.

公开(公告)号：US20190036595A1

公开(公告)日：2019-01-31

申请号：US16071924

申请日：2016-12-15

Applicant: NEC CORPORATION

Inventor： Taichi OHTSUJI ,  Kazushi MURAOKA

IPC: H04B7/14 ,  H04W76/14 ,  H04W48/16 ,  H04W24/10 ,  H04W72/08

Abstract: A relay selecting entity (1, 3, 5) is configured to select at least one specific relay terminal (2) suitable for a first remote terminal (1) from among one or more relay terminals (2) while considering the number of other remote terminals connected to or communicating with each relay terminal (2). Each specific relay terminal (2) relays traffic between the first remote terminal (1) and a base station (3) through a device-to-device (D2D) link (102) between the specific relay terminal (2) and the first remote terminal (1) and through a backhaul link (101) between the specific relay terminal and the base station.

公开(公告)号：US20180139684A1

公开(公告)日：2018-05-17

申请号：US15572683

申请日：2016-01-21

Applicant: NEC Corporation

Inventor： Hiroaki AMINAKA ,  Kazushi MURAOKA ,  Taichi OHTSUJI

IPC: H04W40/22 ,  H04W76/14 ,  H04W40/36

CPC classification number: H04W40/22 ,  H04W40/36 ,  H04W76/10 ,  H04W76/14 ,  H04W88/04

Abstract: A wireless terminal apparatus (2) is configured, before the wireless terminal apparatus (2) is requested by another wireless terminal (1) or a D2D controller (5) to start a relay operation between the other wireless terminal (1) and the cellular network (3, 4), to hold connection information necessary to allow the other wireless terminal (1) to communicate with the cellular network (3, 4) or with a node (7) in an external network (6) via the relay operation performed by the wireless terminal apparatus (2). It is thus, for example, possible to contribute to reducing latency from when a mobile relay is requested to start a relay operation until the relay operation can be started.

公开(公告)号：US20170332266A1

公开(公告)日：2017-11-16

申请号：US15668936

申请日：2017-08-04

Applicant: NEC Corporation

Inventor： Hisashi FUTAKI ,  Hiroaki AMINAKA ,  Hiroto SUGAHARA ,  Yoshikazu KAKURA ,  Kazushi MURAOKA

IPC: H04W24/08 ,  H04W72/04 ,  H04W88/10 ,  H04W88/02 ,  H04W76/04 ,  H04W72/08 ,  H04W16/14 ,  H04W88/06 ,  H04L5/00 ,  H04B17/382 ,  H04B17/318 ,  H04B17/309 ,  H04B17/24

CPC classification number: H04W24/08 ,  H04B17/24 ,  H04B17/309 ,  H04B17/318 ,  H04B17/382 ,  H04L5/0048 ,  H04W16/14 ,  H04W24/10 ,  H04W72/0453 ,  H04W72/085 ,  H04W76/27 ,  H04W88/02 ,  H04W88/06 ,  H04W88/10

Abstract: In one embodiment, a radio terminal (2) is used in a radio communication system (100) and communicates with a radio station (1). The radio terminal (2) includes a measurement unit (20). The measurement unit (20) operates to perform, using a terminal measurement procedure for executing a first terminal measurement corresponding to radio access technology applied to the radio communication system (100), a second terminal measurement of a shared frequency shared by a plurality of radio systems including the radio communication system (100). This embodiment therefore contributes to simplification of a measurement function which should be supported by the radio terminal when the radio communication system uses a shared frequency (e.g., TVWS) shared by the plurality of radio systems.

公开(公告)号：US20160316386A1

公开(公告)日：2016-10-27

申请号：US15199264

申请日：2016-06-30

Applicant: NEC Corporation

Inventor： Hisashi FUTAKI ,  Hiroaki AMINAKA ,  Hiroto SUGAHARA ,  Yoshikazu KAKURA ,  Kazushi MURAOKA

IPC: H04W24/08 ,  H04L5/00 ,  H04W76/04 ,  H04W72/08 ,  H04W24/10 ,  H04W72/04

CPC classification number: H04W24/08 ,  H04B17/24 ,  H04B17/309 ,  H04B17/318 ,  H04B17/382 ,  H04L5/0048 ,  H04W16/14 ,  H04W24/10 ,  H04W72/0453 ,  H04W72/085 ,  H04W76/27 ,  H04W88/02 ,  H04W88/06 ,  H04W88/10

Abstract: In one embodiment, a radio terminal (2) is used in a radio communication system (100) and communicates with a radio station (1). The radio terminal (2) includes a measurement unit (20). The measurement unit (20) operates to perform, using a terminal measurement procedure for executing a first terminal measurement corresponding to radio access technology applied to the radio communication system (100), a second terminal measurement of a shared frequency shared by a plurality of radio systems including the radio communication system (100). This embodiment therefore contributes to simplification of a measurement function which should be supported by the radio terminal when the radio communication system uses a shared frequency (e.g., TVWS) shared by the plurality of radio systems.

公开(公告)号：US20130116000A1

公开(公告)日：2013-05-09

申请号：US13661874

申请日：2012-10-26

Applicant: NEC CORPORATION

Inventor： Toshifumi NAKAMURA ,  Kojiro HAMABE ,  Masayuki ARIYOSHI ,  Kazushi MURAOKA

IPC: H04W52/04

CPC classification number: H04W52/0206 ,  H04W24/02 ,  H04W28/0289 ,  H04W52/0203 ,  H04W52/0274 ,  H04W52/04 ,  H04W52/325 ,  H04W72/0406 ,  H04W88/08 ,  Y02D70/00 ,  Y02D70/164

Abstract: [Problems] Because it is not possible to reduce sufficiently the number of base stations that starts uselessly in spite of being in low traffic state, it is not possible to lower interference between adjacent cells and power consumption sufficiently.[Measures] A base station starts transmission of a control signal with predetermined power when communication between other base station and a mobile station is started and a first predetermined condition is satisfied.

公开(公告)号：US20130115962A1

公开(公告)日：2013-05-09

申请号：US13661896

申请日：2012-10-26

Applicant: NEC CORPORATION

Inventor： Toshifumi NAKAMURA ,  Kojiro HAMABE ,  Masayuki ARIYOSHI ,  Kazushi MURAOKA

IPC: H04W72/04

CPC classification number: H04W52/0206 ,  H04W24/02 ,  H04W28/0289 ,  H04W52/0203 ,  H04W52/0274 ,  H04W52/04 ,  H04W52/325 ,  H04W72/0406 ,  H04W88/08 ,  Y02D70/00 ,  Y02D70/164

Abstract: [Problems] Because it is not possible to reduce sufficiently the number of base stations that starts uselessly in spite of being in low traffic state, it is not possible to lower interference between adjacent cells and power consumption sufficiently.[Measures] A base station starts transmission of a control signal with predetermined power when communication between other base station and a mobile station is started and a first predetermined condition is satisfied.

公开(公告)号：US20240267127A1

公开(公告)日：2024-08-08

申请号：US18570128

申请日：2021-06-15

Applicant: NEC Corporation

Inventor： Mingqi WU ,  Kazushi MURAOKA

IPC: H04B10/516 ,  H04J14/02

CPC classification number: H04B10/516 ,  H04J14/02

Abstract: A penalty is introduced to the channel with less noise when the difference in the transmitted signal quality among channels is reduced; therefore, an equalization apparatus according to an exemplary aspect of the disclosure includes a processing means for performing a process associated with a signal using a transfer function with a coefficient, the signal propagating through each of a plurality of channels; and a coefficient generating means for generating the coefficient based on channel quality information on each of the plurality of channels.

公开(公告)号：US20240106550A1

公开(公告)日：2024-03-28

申请号：US18222584

申请日：2023-07-17

Applicant: NEC Corporation

Inventor： Takanobu DOI ,  Kazushi MURAOKA ,  Naoto ISHII ,  Jun SHIKIDA

IPC: H04B17/21 ,  H04B17/336

CPC classification number: H04B17/21 ,  H04B17/336

Abstract: A base station, a method for a base station, and a program capable of appropriately selecting radio terminals for which spatial multiplexing is performed and an MCS, and thereby increasing throughput in multi-user MIMO are provided. A base station 11 according to the present disclosure includes: a correction parameter storage unit 1141 configured to store a plurality of correction parameters for each of a plurality of radio terminals 12, the plurality of correction parameters being provided for each of the radio terminals 12; a correction parameter selection unit 1131 configured to select a predetermined correction parameter from among the plurality of correction parameters based on a combination of radio terminals 12 that are spatially multiplexed in the same radio resource; a correction value calculation unit 1132 configured to calculate a correction value of the radio terminal 12 based on the predetermined correction parameter.

公开(公告)号：US20240045238A1

公开(公告)日：2024-02-08

申请号：US18266430

申请日：2020-12-25

Applicant: NEC Corporation

Inventor： Mingqi WU ,  Emmanuel LE TAILLANDIER GABORY ,  Kazushi MURAOKA ,  Masaki SATO

IPC: G02F1/01 ,  H04B10/50 ,  G02B27/10

CPC classification number: G02F1/0123 ,  H04B10/5053 ,  G02B27/106

Abstract: It is difficult to carry out automatic bias control to an optical modulator without a dither signal with a simple configuration, therefore, an optical transmitter comprising the controller configured to adjust an adjusted bias voltage based on the coupled optical signal, the adjusted bias voltage being one of a first bias voltage applied to the first optical modulator, a second bias voltage applied to the second optical modulator and a third bias voltage applied to the third optical modulator and maintain a value of bias voltages other than the adjusted voltage in the first bias voltage, the second bias voltage and the third voltage.