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：US20230019184A1

公开(公告)日：2023-01-19

申请号：US17786662

申请日：2019-12-26

Applicant: NEC Corporation

Inventor： Rintaro Kato ,  Taketoshi Nakajima ,  Takamichi Inoue ,  Shinchi Anami

IPC: H04W36/00

Abstract: In a control apparatus, a channel selection control unit selects a “switching destination channel pair” from among a plurality of “switching destination channel pair candidates” in a plurality of radio channels. The “switching destination channel pair” is selected based on the degree of similarity between two BSSIDs of two radio channels constituting the currently-connected radio channel pair, and a plurality of degrees of similarity each of which is a degree of similarly between two BSSIDs of two radio channels constituting a respective one of the plurality of switching destination channel pair candidates. A channel switching control unit performs control so that radio units connect to the switching destination channel pair selected by the channel selection control unit.

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：US09949144B2

公开(公告)日：2018-04-17

申请号：US14781239

申请日：2014-03-28

Applicant: NEC Corporation

Inventor： Hiroto Sugahara ,  Hisashi Futaki ,  Kosei Kobayashi ,  Takamichi Inoue

IPC: H04L1/00 ,  H04W24/02 ,  H04W16/22 ,  H04W24/10

CPC classification number: H04W24/02 ,  H04W16/22 ,  H04W24/10

Abstract: A method and an apparatus for controlling a radio parameter, as well as a network operation management apparatus and a radio base station, are provided that enable optimization control taking a dead zone into consideration. A radio parameter control apparatus (10) for controlling a radio parameter of a radio base station (20) includes a measured data analysis section (101) that analyzes data measured by a plurality of radio terminals including a radio terminal in idle state to detect a dead zone in a radio cell, and a radio parameter control section (102) that controls the radio parameter of the radio base station based on information regarding the dead zone.

公开(公告)号：US09913182B2

公开(公告)日：2018-03-06

申请号：US15036861

申请日：2014-06-17

Applicant: NEC Corporation

Inventor： Takamichi Inoue ,  Yoshinori Watanabe

IPC: H04W36/00 ,  H04W24/10 ,  H04W36/08 ,  H04W36/30 ,  H04W88/02 ,  H04W88/08

CPC classification number: H04W36/0088 ,  H04W24/10 ,  H04W36/08 ,  H04W36/30 ,  H04W88/02 ,  H04W88/08

Abstract: The base station notifies each mobile station of reporting conditions for causing the mobile station to transmit a measurement report containing measurement results of the radio quality. The reporting conditions include a first reporting condition and a second reporting condition in which the offset value added to the measurement result of the radio quality is greater than that of the first reporting condition and in which the guard time, that is a time from when the reporting condition is satisfied until the measurement report is transmitted, is shorter than that of the first reporting condition. The base station detects a mobile station that has transmitted a measurement report as a result of satisfaction of the second reporting condition as a handover required of mobile station whose radio quality becomes lower than a predetermined value within a predetermined period and performs a handover process of the mobile station.

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.

公开(公告)号：US09445414B2

公开(公告)日：2016-09-13

申请号：US14645515

申请日：2015-03-12

Applicant: NEC CORPORATION

Inventor： Takamichi Inoue ,  Yoshikazu Kakura

IPC: H04W72/04 ,  H04L1/16 ,  H04L5/00 ,  H04B7/216 ,  H04L1/00

CPC classification number: H04L5/005 ,  H04B7/216 ,  H04J13/0062 ,  H04L1/0026 ,  H04L1/1671 ,  H04L5/0016 ,  H04L5/0053 ,  H04L5/0092 ,  H04L27/2628 ,  H04W72/042

Abstract: A reference signal multiplexing method for multiple mobile stations includes: grouping together control signals for the multiple mobile stations; and multiplexing reference signals corresponding to the control signals by CDM over the same bandwidth as that of grouped control signals.

公开(公告)号：US09277545B2

公开(公告)日：2016-03-01

申请号：US14669932

申请日：2015-03-26

Applicant: NEC Corporation

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

IPC: H04W72/04 ,  H04L5/00 ,  H04L27/26

CPC classification number: H04W72/0453 ,  H04L5/0007 ,  H04L5/0037 ,  H04L5/0041 ,  H04L5/0044 ,  H04L5/0048 ,  H04L5/0057 ,  H04L5/006 ,  H04L5/0064 ,  H04L5/0094 ,  H04L27/2614 ,  H04W72/0406 ,  H04W72/0413 ,  H04W72/042 ,  H04W88/02 ,  H04W88/08

Abstract: A base station includes a transmitter configured to transmit a downlink controlling formation to a user equipment, the downlink control information being generated based on an uplink allocation information indicating a first frequency block corresponding to a first plurality of subcarriers which are contiguous in frequency and a second frequency block corresponding to a second plurality of subcarriers which are contiguous in frequency, wherein at least a subcarrier, which is not indicated by the uplink allocation information, is located between the first frequency block and the second frequency block; and a receiver configured to receive a reference signal including a reference signal sequence having a sequence length corresponding to a first bandwidth which is a summation of a second bandwidth of the first frequency block and a third bandwidth of the second frequency block.

Abstract translation: 基站包括被配置为向用户设备发送下行链路控制结构的发射机，所述下行链路控制信息是基于指示与频率相邻的第一多个子载波相对应的第一频率块的上行链路分配信息而生成的， 频率块对应于频率相邻的第二多个子载波，其中至少一个未被所述上行链路分配信息指示的副载波位于所述第一频率块和所述第二频率块之间; 以及接收器，被配置为接收包括参考信号序列的参考信号，所述参考信号序列具有对应于作为所述第一频率块的第二带宽和所述第二频率块的第三带宽的和的第一带宽的序列长度。