公开(公告)号：US20150050939A1

公开(公告)日：2015-02-19

申请号：US14396268

申请日：2013-01-11

Applicant: NEC Corporation

Inventor： Hisashi Futaki ,  Hiroaki Aminaka ,  Hiroto Sugahara ,  Yoshikazu Kakura ,  Kazushi Muraoka

IPC: H04W24/08 ,  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.

Abstract translation: 在一个实施例中，在无线电通信系统（100）中使用无线电终端（2）并与无线电台（1）进行通信。 无线电终端（2）包括测量单元（20）。 测量单元（20）使用用于执行与应用于无线电通信系统（100）的无线电接入技术相对应的第一终端测量的终端测量程序来执行由多个无线电共享的共享频率的第二终端测量 包括无线电通信系统（100）的系统。 因此，本实施例有助于在无线电通信系统使用由多个无线电系统共享的共享频率（例如，TVWS）时由无线电终端支持的测量功能的简化。

公开(公告)号：US12207116B2

公开(公告)日：2025-01-21

申请号：US17968028

申请日：2022-10-18

Applicant: NEC Corporation

Inventor： Hisashi Futaki ,  Hiroaki Aminaka ,  Hiroto Sugahara ,  Yoshikazu Kakura ,  Kazushi Muraoka

IPC: H04W24/08 ,  H04B17/24 ,  H04B17/309 ,  H04B17/318 ,  H04B17/382 ,  H04L5/00 ,  H04W16/14 ,  H04W24/10 ,  H04W72/0453 ,  H04W72/542 ,  H04W76/27 ,  H04W88/02 ,  H04W88/06 ,  H04W88/10

Abstract: 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).

公开(公告)号：US12016020B2

公开(公告)日：2024-06-18

申请号：US18508558

申请日：2023-11-14

Applicant: NEC Corporation

Inventor： Le Liu ,  Yoshikazu Kakura ,  Naoto Ishii ,  Takamichi Inoue

IPC: H04W72/1273 ,  H04B7/024 ,  H04J11/00 ,  H04L5/00 ,  H04W48/12 ,  H04W72/12 ,  H04W72/23 ,  H04W84/04

CPC classification number: H04W72/1273 ,  H04B7/024 ,  H04J11/0053 ,  H04L5/0035 ,  H04L5/0053 ,  H04W48/12 ,  H04W72/12 ,  H04W72/23 ,  H04W84/042

Abstract: A radio communication system includes: a plurality of cells having different scrambling sequences, respectively, wherein at least two cells communicate with at lease two user terminals connected to different serving cells; and a controller which controls the plurality of cells and provides a single scrambling sequence to said at least two cells and said at least two user terminals for control signal transmission and reception.

公开(公告)号：US11864180B2

公开(公告)日：2024-01-02

申请号：US18134917

申请日：2023-04-14

Applicant: NEC Corporation

Inventor： Le Liu ,  Yoshikazu Kakura ,  Naoto Ishii ,  Takamichi Inoue

IPC: H04W72/1273 ,  H04J11/00 ,  H04L5/00 ,  H04W72/12 ,  H04W72/23 ,  H04B7/024 ,  H04W48/12 ,  H04W84/04

CPC classification number: H04W72/1273 ,  H04B7/024 ,  H04J11/0053 ,  H04L5/0035 ,  H04L5/0053 ,  H04W48/12 ,  H04W72/12 ,  H04W72/23 ,  H04W84/042

Abstract: A radio communication system includes: a plurality of cells having different scrambling sequences, respectively, wherein at least two cells communicate with at lease two user terminals connected to different serving cells; and a controller which controls the plurality of cells and provides a single scrambling sequence to said at least two cells and said at least two user terminals for control signal transmission and reception.

公开(公告)号：US11337124B2

公开(公告)日：2022-05-17

申请号：US16604110

申请日：2018-03-15

Applicant: NEC CORPORATION

Inventor： Tomu Tamura ,  Yoshikazu Kakura ,  Hisashi Futaki

IPC: H04W36/00 ,  H04W36/08

Abstract: In order to make a slice that is being used by or available for a terminal apparatus, available even at a handover destination or a cell reselection destination, a first base station 100 includes: an obtaining section 141 configured to obtain information related to usage status of a slice provided by the first base station 100; and a transmission processing section 143 configured to transmit the information related to the usage status of the slice.

公开(公告)号：US11323215B2

公开(公告)日：2022-05-03

申请号：US16633022

申请日：2018-05-11

Applicant: NEC Corporation

Inventor： Yoshikazu Kakura

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

Abstract: In order to enable control related to radio communication to be performed more appropriately when radio transmission schemes coexist, a radio communication apparatus according to an example aspect of the present invention includes a radio communication processing unit configured to perform communication using a first radio transmission scheme within a frequency band, wherein the radio communication processing unit is configured to perform communication using a second radio transmission scheme within a bandwidth part of the frequency band, radio resources within the bandwidth part being allocable for communication using the second radio transmission scheme.

公开(公告)号：US11218260B1

公开(公告)日：2022-01-04

申请号：US17356779

申请日：2021-06-24

Applicant: NEC Corporation

Inventor： Kengo Oketani ,  Yoshikazu Kakura

IPC: H04W72/04 ,  H04L5/00 ,  H04J13/00 ,  H04W28/04 ,  H04J13/16

Abstract: A device and method is which plurality of Zadoff-Chu sequences is allocated to a frame, a value of a parameter in the Zadoff-Chu sequence is different among the plurality of Zadoff-Chu sequences, and the Zadoff-Chu sequence allocated to the frame is different among a plurality of cells.

公开(公告)号：US11140702B2

公开(公告)日：2021-10-05

申请号：US16358288

申请日：2019-03-19

Applicant: NEC Corporation

Inventor： Le Liu ,  Yoshikazu Kakura ,  Naoto Ishii ,  Takamichi Inoue

IPC: H04W72/12 ,  H04J11/00 ,  H04L5/00 ,  H04W48/12 ,  H04W84/04 ,  H04B7/024

Abstract: A radio communication system includes: a plurality of cells having different scrambling sequences, respectively, wherein at least two cells communicate with at lease two user terminals connected to different serving cells; and a controller which controls the plurality of cells and provides a single scrambling sequence to said at least two cells and said at least two user terminals for control signal transmission and reception.

公开(公告)号：US20170251490A1

公开(公告)日：2017-08-31

申请号：US15459410

申请日：2017-03-15

Applicant: NEC Corporation

Inventor： Le LIU ,  Yoshikazu Kakura ,  Naoto Ishii ,  Takamichi Inoue

IPC: H04W72/12 ,  H04W48/12

CPC classification number: H04W72/1273 ,  H04B7/024 ,  H04J11/0053 ,  H04L5/0035 ,  H04L5/0053 ,  H04W48/12 ,  H04W72/1205 ,  H04W72/1289 ,  H04W84/042

Abstract: A radio communication system includes: a plurality of cells having different scrambling sequences, respectively, wherein at least two cells communicate with at lease two user terminals connected to different serving cells; and a controller which controls the plurality of cells and provides a single scrambling sequence to said at least two cells and said at least two user terminals for control signal transmission and reception.

公开(公告)号：US09668256B2

公开(公告)日：2017-05-30

申请号：US15132569

申请日：2016-04-19

Applicant: NEC CORPORATION

Inventor： Kenji Koyanagi ,  Takamichi Inoue ,  Le Liu ,  Yoshikazu Kakura

IPC: H04W72/04 ,  H04L5/00 ,  H04L1/00

CPC classification number: H04W72/042 ,  H04L1/0029 ,  H04L5/0039 ,  H04L5/0041 ,  H04L5/006 ,  H04L5/0064 ,  H04L5/0092 ,  H04L5/0094

Abstract: To solve a problem that although the increase of the number of frequency blocks by allocating discontinuous subcarriers (RBs) as in OFDM enables an increase in multi-diversity effect and an improvement in throughput, the number of RB allocation patterns increases with the increase of the number of frequency blocks, resulting in an increase in the amount of information relating to the allocated RBs, the resource block allocation unit is determined when resource blocks discontinuous on the frequency axis are allocated to a terminal, and the number of bits of scheduling information indicating the allocated resource blocks by using Tree Based is set to the number of bits corresponding to the determined allocation unit.