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1. 发明授权

US11510130B2 Car-loaded communication apparatus, in-car communication system, communication method and program 有权
公开(公告)号：US11510130B2
公开(公告)日：2022-11-22
申请号：US17050182
申请日：2019-04-24
申请人： NEC COMMUNICATION SYSTEMS, LTD.
发明人： Takumi Nomura , Tetsuji Kawatsu , Katsuyuki Akizuki , Yuji Harada , Akira Matsumoto , Yuki Baba
IPC分类号： H04W40/24 , H04W4/48 , H04L12/40 , H04W40/20 , H04W40/28
摘要： A car-loaded communication apparatus comprises: an acquisition part; and a selection part. The acquisition part acquires car information related to a state of a car in which a communication network is constructed inside, or an environment in which the car is placed. The selection part selects a communication route of a flow accommodating a transmission packet(s) from a plurality of communication routes included in the communication network, based on: the car information; and communication route information related to a communication route(s) included in the communication network.

2. 发明授权

US10165603B2 Collision detection device, communication device, collision detection method, and program 有权
公开(公告)号：US10165603B2
公开(公告)日：2018-12-25
申请号：US15032149
申请日：2014-09-05
申请人： NEC Communication Systems, Ltd
发明人： Peng Shao , Akira Matsumoto , Ikumi Wada , Yuki Baba
IPC分类号： H04W4/00 , H04W74/08 , H04L29/06 , H04L29/08 , H04W24/08 , H04L1/00 , H04W52/28 , H04L5/00 , H04W52/26 , H04W84/12
摘要： A transmission part transmits a packet by radio. A power detection part performs, at a given cycle, sampling of power of a spatial radio signal in a packet transmission period during which the transmission part transmits the packet. A collision detection part calculates, as an index value, at least one of the average value and the degree of variation of power of the spatial radio signal in the packet transmission period on the basis of sampled data obtained in the sampling by the power detection part. The collision detection part also determines a reference value on the basis of transmission power of the packet. The collision detection part detects whether or not collision of the packet is present by comparing the index value with the reference value.

3. 发明授权

US10356844B2 Communication device 有权
公开(公告)号：US10356844B2
公开(公告)日：2019-07-16
申请号：US15503140
申请日：2015-08-03
申请人： NEC Communication Systems Ltd.
发明人： Akira Matsumoto , Peng Shao , Yuki Baba
IPC分类号： H04W88/02 , H04L12/413 , H04W28/12 , H04W72/08 , H04W84/12 , H04W74/08
摘要： A communication device includes a wireless communication unit, an in-transmission information generating unit, and a neighboring signal presence information generating unit. The wireless communication unit transmits and receives wireless frames via an antenna. The in-transmission information generating unit generates in-transmission information representing whether or not a wireless frame is being transmitted from the antenna. The neighboring signal presence information generating unit generates neighboring signal presence information representing whether or not a signal of a predetermined level or higher is present on a wireless channel that is the same as a wireless channel of the wireless frame. The collision detection unit determines a transmission end point of the wireless frame transmitted from the wireless communication unit based on the in-transmission information, determines whether or not there is a signal of the predetermined level or higher on the wireless channel through which the wireless frame is transmitted within a period from the determined transmission end point until a first time elapses, based on the neighboring signal presence information, and determines whether or not the transmitted wireless frame collided with another wireless frame, based on the determination made based on the neighboring signal presence information.

4. 发明授权

US09867126B2 Wireless base station and wireless communication systems using the same 有权
公开(公告)号：US09867126B2
公开(公告)日：2018-01-09
申请号：US15268003
申请日：2016-09-16
申请人： ADVANCED TELECOMMUNICATIONS RESEARCH INSTITUTE INTERNATIONAL , NEC COMMUNICATION SYSTEMS, LTD.
发明人： Hiroyuki Yomo , Yoshihisa Kondo , Suhua Tang , Sadao Obana , Tetsuya Ito , Akira Matsumoto , Koichi Yoshimura
IPC分类号： H04W52/02
CPC分类号： H04W52/0206 , Y02B70/32 , Y02D70/00 , Y02D70/142 , Y02D70/162
摘要： 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).

5. 发明授权

US10244558B2 Transmission control of a wireless communication terminal with transmission loss and collision detection 有权
公开(公告)号：US10244558B2
公开(公告)日：2019-03-26
申请号：US15119020
申请日：2014-08-14
申请人： NEC Communication Systems, Ltd
发明人： Yuki Baba , Akira Matsumoto , Peng Shao
IPC分类号： H04W74/08 , H04L12/413
摘要： 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.

6. 发明申请

US20170006540A1 WIRELESS BASE STATION AND WIRELESS COMMUNICATION SYSTEMS USING THE SAME 有权
标题翻译：无线基站和无线通信系统
公开(公告)号：US20170006540A1
公开(公告)日：2017-01-05
申请号：US15268003
申请日：2016-09-16
申请人： ADVANCED TELECOMMUNICATIONS RESEARCH INSTITUTE INTERNATIONAL , NEC COMMUNICATION SYSTEMS, LTD.
发明人： Hiroyuki Yomo , Yoshihisa Kondo , Suhua Tang , Sadao Obana , Tetsuya Ito , Akira Matsumoto , Koichi Yoshimura
IPC分类号： H04W52/02
CPC分类号： H04W52/0206 , Y02B70/32 , Y02D70/00 , Y02D70/142 , Y02D70/162
摘要： 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).
摘要翻译：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。

7. 发明授权

US09030945B2 Wireless communication device that is capable of improving data transmission efficiency, associated network, and method 有权
标题翻译：能够提高数据传输效率，相关网络和方法的无线通信设备
公开(公告)号：US09030945B2
公开(公告)日：2015-05-12
申请号：US14505815
申请日：2014-10-03
申请人： NEC Communication Systems, Ltd.
发明人： Peng Shao , Stefan Aust , Akira Matsumoto , Tetsuya Ito , Peter Davis
IPC分类号： H04W24/06 , H04W24/02 , H04L12/24 , H04L12/26 , H04W88/02 , H04W74/08
CPC分类号： H04W24/06 , H04L41/0654 , H04L43/0805 , H04W24/02 , H04W74/0825 , H04W88/02
摘要： 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.
摘要翻译：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。

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