公开(公告)号：US20240428419A1

公开(公告)日：2024-12-26

申请号：US18687905

申请日：2021-09-13

Applicant: NEC Corporation ,  NEC Communication Systems, Ltd.

Inventor： Yuji Tahara ,  Naoki Saikusa ,  Kenji Inamoto ,  Kana Nishiyama ,  Osamu Honda

IPC: G06T7/11 ,  G06T7/00

Abstract: An image processing apparatus (100) includes: an acquisition unit (102) that acquires a plurality of images acquired by photographing a same location at different timing; a selection unit (104) that compares at least two of the plurality of images, and selects a target region being a region where a difference between the two images satisfies a criterion; and a processing unit (106) that performs average processing of averaging the target region included in each of the at least two images.

公开(公告)号：US10334628B2

公开(公告)日：2019-06-25

申请号：US15968887

申请日：2018-05-02

Applicant: NEC Communication Systems, Ltd. ,  A School Corporation Kansai University ,  Advanced Telecommunications Research Institute International

Inventor： Tetsuya Ito ,  Yukihiro Hara ,  Masahito Iwai ,  Hiroyuki Yomo ,  Takatoshi Kimura ,  Akio Hasegawa

IPC: H04W74/08 ,  H04W72/04

Abstract: A transmitter generates a header frame having a frame length indicating the beginning of data to be transmitted, data frames having frame lengths representing the data to be transmitted, and an end frame having a frame length indicating the end of the data to be transmitted. Then, for all of the header frame, data frames and end frame, the transmitter executes transmitting the kth frame when the wireless communication space is available, thereby transmitting the header frame, data frames and end frame, one after another, in accordance with the CSMA/CA scheme.

公开(公告)号：US10244558B2

公开(公告)日：2019-03-26

申请号：US15119020

申请日：2014-08-14

Applicant: NEC Communication Systems, Ltd

Inventor： Yuki Baba ,  Akira Matsumoto ,  Peng Shao

IPC: H04W74/08 ,  H04L12/413

Abstract: A wireless communication terminal has: a wireless module part which transmits a radio frame signal; a transmission loss information detection part which detects transmission loss information representing whether or not the radio frame signal transmitted by the wireless module part has reached a transmission destination; a collision information detection part which detects collision information representing an aspect of collision between the radio frame signal transmitted by the wireless module part and another radio frame signal; and a transmission control part which controls a transmission process executed by the wireless module part, on a basis of the transmission loss information and the collision information.

公开(公告)号：US20170006540A1

公开(公告)日：2017-01-05

申请号：US15268003

申请日：2016-09-16

Applicant: ADVANCED TELECOMMUNICATIONS RESEARCH INSTITUTE INTERNATIONAL ,  NEC COMMUNICATION SYSTEMS, LTD.

Inventor： Hiroyuki Yomo ,  Yoshihisa Kondo ,  Suhua Tang ,  Sadao Obana ,  Tetsuya Ito ,  Akira Matsumoto ,  Koichi Yoshimura

IPC: H04W52/02

CPC classification number: H04W52/0206 ,  Y02B70/32 ,  Y02D70/00 ,  Y02D70/142 ,  Y02D70/162

Abstract: A wireless base station (1) includes a wakeup device (13) and a main device (14). When the main device (14) is in a sleep mode, the wakeup device (13) is connected to the antenna (11). Then, when the wakeup device (13) receives a wakeup signal for activating the wireless base station (1) from a terminal device assigned to the wireless base station (1) in a communication band used for wireless communication with the terminal device and when the information for identifying a wireless base station to be activated contained in the received wakeup signal is identical with the identification information of the wireless base station (1), the wakeup device (13) outputs a driving signal to the main device (14). The main device (14) transitions from the sleep mode to an operating mode in response to the driving signal from the wakeup device (13).

Abstract translation: 无线基站（1）包括唤醒设备（13）和主设备（14）。 当主设备（14）处于睡眠模式时，唤醒设备（13）连接到天线（11）。 然后，当唤醒装置（13）在与终端装置进行无线通信的通信频带中从分配给无线基站（1）的终端装置接收到激活无线基站（1）的唤醒信号时， 用于识别接收到的唤醒信号中包含的要激活的无线基站的信息与无线基站（1）的识别信息相同，所述唤醒设备（13）向主设备（14）输出驱动信号。 响应于来自唤醒装置（13）的驱动信号，主装置（14）从睡眠模式转换到操作模式。

公开(公告)号：US09532379B2

公开(公告)日：2016-12-27

申请号：US14383195

申请日：2013-03-04

Applicant: Advanced Telecommunications Research Institute International ,  NEC Communication Systems, Ltd.

Inventor： Yoshihisa Kondo ,  Hiroyuki Yomo ,  Suhua Tang ,  Takatoshi Kimura ,  Masahito Iwai ,  Tetsuya Ito

IPC: H04W74/08 ,  H04W52/02 ,  H04L27/00

CPC classification number: H04W74/0808 ,  H04L27/0006 ,  H04W52/0245 ,  Y02D70/142

Abstract: A receiver has an ID that includes three signal detection intervals (S1, S2, S3). The three signal detection intervals (S1, S2, S3) are detected as the receiver detects a signal consisting of a value larger than a threshold at each of the detection timings (DT1 to DT4). The transmitter transmits four radio frames (FR1 to FR4) such that each of the radio frames straddles the corresponding one of the detection timings (DT1 to DT4) in the receiver.

Abstract translation: 接收机具有包括三个信号检测间隔（S1，S2，S3）的ID。 在每个检测定时（DT1至DT4），接收机检测由大于阈值的值组成的信号，检测出三个信号检测间隔（S1，S2，S3）。 发射机发送四个无线电帧（FR1至FR4），使得每个无线电帧跨接在接收机中的相应的一个检测定时（DT1至DT4）。

公开(公告)号：US09408148B2

公开(公告)日：2016-08-02

申请号：US14387980

申请日：2013-03-18

Applicant: Advanced Telecommunications Research Institute International ,  NEC Communication Systems, Ltd.

Inventor： Takatoshi Kimura ,  Yoshihisa Kondo ,  Hiroyuki Yomo ,  Tetsuya Ito ,  Yukihiro Hara

IPC: H04W52/02 ,  H04W76/04

CPC classification number: H04W52/0229 ,  H04W76/27 ,  Y02D70/00

Abstract: A terminal device (1) frame-length-modulates an identifier of the radio apparatus (3) to generate a plurality of frames having a plurality of frame lengths, and transmits the generated plurality of frames to an access point (2) over wire or wireless communication. The access point (2) transfers the plurality of frames transmitted by the terminal device (1) to the radio apparatus (3) in the IP or MAC layer. The radio apparatus (3) detects the plurality of frame lengths of the plurality of frames received from the access point (2) and decodes the detected plurality of frame lengths to obtain an identifier. If the obtained identifier matches the identifier of the radio apparatus (3), the radio apparatus (3) transitions to active mode.

Abstract translation: 终端设备（1）对无线电设备（3）的标识符进行帧长调制以生成具有多个帧长度的多个帧，并且通过有线或多路传输所生成的多个帧到接入点（2） 无线通信。 接入点（2）将由终端设备（1）发送的多个帧传送到IP或MAC层中的无线电设备（3）。 无线电设备（3）检测从接入点（2）接收的多个帧的多个帧长度，并解码检测到的多个帧长度以获得标识符。 如果获得的标识符与无线电设备（3）的标识符匹配，则无线电设备（3）转换到活动模式。

公开(公告)号：US09030945B2

公开(公告)日：2015-05-12

申请号：US14505815

申请日：2014-10-03

Applicant: NEC Communication Systems, Ltd.

Inventor： Peng Shao ,  Stefan Aust ,  Akira Matsumoto ,  Tetsuya Ito ,  Peter Davis

IPC: H04W24/06 ,  H04W24/02 ,  H04L12/24 ,  H04L12/26 ,  H04W88/02 ,  H04W74/08

CPC classification number: H04W24/06 ,  H04L41/0654 ,  H04L43/0805 ,  H04W24/02 ,  H04W74/0825 ,  H04W88/02

Abstract: A wireless communication device includes a data transmission and reception section that wirelessly transmits a plurality of test packets; a signal sensing section that senses a power of a spatial radio wave signal on a frequency channel that is the same as the plurality of test packets and outputs sample data of the sensed spatial radio wave signal; a calculation processing section that converts the sample data into time series sample data; a collision detection section that calculates a packet collision rate based on the number of packet collisions and the number of the plurality of test packets if there is a packet collision due to interference of the plurality of test packets with another communication; and a control section that adjusts a parameter that the data transmission and reception section uses based on a calculation result of the collision detection section.

Abstract translation: 无线通信装置包括无线发送多个测试分组的数据发送接收部; 信号感测部，其感测与所述多个测试分组相同的频率信道上的空间无线电波信号的功率，并输出所感测的空间无线电波信号的采样数据; 计算处理部分，将样本数据转换为时间序列样本数据; 冲突检测部分，如果由于所述多个测试分组与另一通信的干扰而存在分组冲突，则基于分组冲突的数量和所述多个测试分组的数量来计算分组冲突率; 以及控制部，其基于所述碰撞检测部的计算结果来调整所述数据发送接收部使用的参数。

公开(公告)号：US09025697B2

公开(公告)日：2015-05-05

申请号：US14380378

申请日：2013-02-25

Applicant: Advanced Telecommunications Research Institute International ,  NEC Communication Systems, Ltd.

Inventor： Yoshihisa Kondo ,  Hiroyuki Yomo ,  Suhua Tang ,  Takatoshi Kimura ,  Masahito Iwai ,  Yukihiro Hara ,  Tetsuya Ito

IPC: H04L1/00 ,  H04L25/49

CPC classification number: H04L1/0083 ,  H04L25/49 ,  H04L25/4902

Abstract: A transmitter incorporates a table (TBL1) for assigning the frame lengths of 560 μs and 600 μs to the code “0” in a binary system and assigning the frame lengths of 600 μs and 560 μs to the code “1” in the binary system. The transmitter refers to the table (TBL1) and assigns the two frame lengths of 560 μs and 600 μs and the two frame lengths of 600 μs and 560 μs to the codes “0” and “1”, respectively, in the code sequences [0,0], [0,1], [1,0] and [1,1] representing the transmission information “0” to “3” represented using the binary system, and sequentially transmits four radio signals having the assigned four frame lengths.

Abstract translation: 发射机包含一个表（TBL1），用于在二进制系统中将代码“0”分配为560μs和600μs的帧长度，并将二进制系统中的代码“1”的帧长度分配为600μs和560μs 。 发射机参考表（TBL1），分别将码长为560μs和600μs，两个帧长度分别为600μs和560μs，分别代码为“0”和“1” 0,0]，[0,1]，[1,0]和[1,1]表示使用二进制系统表示的发送信息“0”至“3”，并且顺序地发送具有分配的四个帧的四个无线电信号 长度