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1. 发明公开

US20240161609A1 ROAD MONITORING SYSTEM, ROAD MONITORING DEVICE, AND ROAD MONITORING METHOD 审中-公开
公开(公告)号：US20240161609A1
公开(公告)日：2024-05-16
申请号：US18284709
申请日：2021-04-09
申请人： NEC CORPORATION
发明人： Yuma MATSUDA , Tomoyuki HINO
IPC分类号： G08G1/052 , G02B6/12 , G08G1/04
CPC分类号： G08G1/052 , G02B6/12002 , G08G1/04 , G02B2006/12138
摘要： To improve the accuracy of vehicle speed calculation, the present disclosure extracts, on the basis of an optical signal received from an optical fiber cable laid in a road, a first pattern according to the traveling state of a vehicle on the road in a first time range and a first distance range, generates, on the basis of the first pattern, a second pattern in which the number of time points included in the first time range or the number of positions included in the first distance range has been decreased, and calculates the traveling speed of the vehicle on the road on the basis of the second pattern.

2. 发明公开

US20240102851A1 POSITION EVALUATION APPARATUS, POSITION EVALUATION METHOD, AND NON-TRANSITORY COMPUTER READABLE MEDIUM 审中-公开
公开(公告)号：US20240102851A1
公开(公告)日：2024-03-28
申请号：US18206469
申请日：2023-06-06
申请人： NEC Corporation
发明人： Wataru KOHNO , Tomoyuki HINO , Sakiko MISHIMA , Takashi MATSUSHITA
IPC分类号： G01H9/00 , H04B10/079
CPC分类号： G01H9/004 , H04B10/0791
摘要： An apparatus includes memory and processor configured to: input, from a sensor, a signal indicating a characteristic vibration occurring at each position of an optical fiber, and estimate, based on the input signal, an aerial section in which the optical fiber being aerially laid over a pole is present; calculate, based on the input signal, sensing data indicating a vibration characteristic of each position of the optical fiber being present in the aerial section, and calculate a difference degree of the sensing data between two neighboring points of the optical fiber; and temporally integrate the difference degree, calculate a time average of the difference degree, estimate, based on a time average value of the difference degree, a position of the pole and a position of an extra length section of the optical fiber, and output an estimation result of positions of the pole and the extra length section.

3. 发明申请

US20210241615A1 TRAFFIC MONITORING APPARATUS AND METHOD OF USING THE SAME 有权
公开(公告)号：US20210241615A1
公开(公告)日：2021-08-05
申请号：US16777803
申请日：2020-01-30
申请人： NEC Corporation
发明人： Chaitanya Prasad NARISETTY , Tomoyuki HINO , Akihiro TANAKA
IPC分类号： G08G1/01 , G08G1/04 , G01H9/00
摘要： A traffic monitoring apparatus includes a distributed acoustic sensor (DAS) for acquiring waterfall data, wherein the waterfall data includes a generation position of a vibration on a roadway adjacent to the DAS, a generation time of the vibration and an amplitude of the vibration. The traffic monitoring apparatus further includes a processor connected to the DAS. The processor is configured to receive the waterfall data from the DAS. The processor is further configured to preprocess the waterfall data. The processor is further configured to separate the preprocessed waterfall data into a plurality of patches, wherein a size of each patch of the plurality of patches is determined based on a parameter of the roadway. The processor is further configured to process each of the plurality of patches to estimate at least one traffic flow property of the roadway.

4. 发明申请

US20190037289A1 OPTICAL NETWORK MANAGEMENT APPARATUS AND METHOD OF ALLOCATING OPTICAL FREQUENCY BAND 审中-公开
公开(公告)号：US20190037289A1
公开(公告)日：2019-01-31
申请号：US16078103
申请日：2017-02-20
申请人： NEC CORPORATION
发明人： Hitoshi TAKESHITA , Shinsuke FUJISAWA , Tomoyuki HINO , Akio TAJIMA
IPC分类号： H04Q11/00 , H04B10/27
CPC分类号： H04Q11/0062 , H04B10/27 , H04J14/0256 , H04J14/0272 , H04Q2011/0073 , H04Q2011/0086
摘要： It is difficult to improve the usage efficiency of an optical communication network due to the passband narrowing effect in a wavelength selection process in an optical communication network using a wavelength division multiplexing system; therefore, an optical network management apparatus according to an exemplary aspect of the present invention includes wavelength selection information generating means for generating wavelength selection information on a wavelength selection process through which an optical path accommodating an information signal goes, with respect to each optical path; and wavelength selection information notifying means for notifying an optical node device through which the optical path goes of the wavelength selection information.

5. 发明申请

US20160212511A1 OPTICAL NETWORK CONTROLLER AND OPTICAL NETWORK CONTROL METHOD 审中-公开
标题翻译：光网络控制器和光网络控制方法
公开(公告)号：US20160212511A1
公开(公告)日：2016-07-21
申请号：US14914159
申请日：2014-09-01
申请人： NEC Corporation
发明人： Hitoshi TAKESHITA , Tomoyuki HINO , Akio TAJIMA
IPC分类号： H04Q11/00 , H04J14/02
CPC分类号： H04Q11/0005 , H04J14/02 , H04J14/0242 , H04J14/0283 , H04J14/0287 , H04Q2011/0086
摘要： In an optical network by a highly dense wavelength division multiplexing system using a flexible frequency grid, it is difficult to improve the optical bandwidth utilization efficiency in the optical network as a whole with improving the fault tolerance, therefore, an optical network controller according to an exemplary aspect of the present invention includes an optical path setting means for selecting a plurality of optical node pairs composed of two optical nodes from among a plurality of optical nodes composing the optical network by a highly dense wavelength division multiplexing system using a flexible frequency grid, and setting, between each of the plurality of optical node pairs, a plurality of optical paths including a first optical path and a second optical path each of which links the optical node pair through various routes; and an optical band setting means for setting respective optical bands based on optical path length and transmission capacity so that an amount of optical bandwidths of the first optical path may become larger than or equal to an amount of optical bandwidths of the second optical path.
摘要翻译：在通过使用柔性频率网格的高度密集的波分复用系统的光网络中，难以提高光网络中的光纤带宽利用效率，同时提高了容错性，因此，根据本发明的示例性方面包括一种光路设置装置，用于通过使用柔性频率网格的高密度波分复用系统从组成光网络的多个光节点中选择由两个光节点组成的多个光节点对，并且在所述多个光学节点对中的每一个之间设置包括第一光路和第二光路的多个光路，每个光路通过各种路线链接所述光节点对; 以及光带设定装置，用于基于光路长度和传输容量设置各个光带，使得第一光路的光学带宽的量可以变得大于或等于第二光路的光学带宽量。

6. 发明公开

US20240184014A1 OPTICAL FIBER SENSING SYSTEM, OPTICAL FIBER SENSING METHOD, AND VIBRATION DEVICE 审中-公开
公开(公告)号：US20240184014A1
公开(公告)日：2024-06-06
申请号：US18526798
申请日：2023-12-01
申请人： NEC Corporation
发明人： Sakiko MISHIMA , Takashi MATSUSHITA , Wataru KOHNO , Tomoyuki HINO
IPC分类号： G01W1/14 , G01D5/353 , G01H9/00
CPC分类号： G01W1/14 , G01D5/35358 , G01H9/004
摘要： An optical fiber sensing system according to the present disclosure includes an optical fiber, an interrogator connected to the optical fiber, and a vibration device disposed in a vicinity of the optical fiber. The vibration device acquires weather information regarding an installation location of the vibration device, and applies vibration according to the acquired weather information to the optical fiber. The interrogator detects vibration applied to the optical fiber by the vibration device, based on an optical signal received from the optical fiber, and determines weather conditions at the installation location of the vibration device, based on the detected vibration.

7. 发明申请

US20220262240A1 TRAFFIC PREDICTION APPARATUS, SYSTEM, METHOD, AND NON-TRANSITORY COMPUTER READABLE MEDIUM 有权
公开(公告)号：US20220262240A1
公开(公告)日：2022-08-18
申请号：US17622958
申请日：2019-07-01
申请人： NEC Corporation
发明人： Chaitanya Prasad NARISETTY , Akihiro TANAKA , Tomoyuki HINO
IPC分类号： G08G1/01 , G08G1/04 , G08G1/042 , G08G1/052 , G06N20/00
摘要： The present disclosure provides a traffic prediction apparatus, system, method and program capable of predicting the number of vehicles and the speed of vehicles in a predetermined time and in a predetermined range based on waterfall data of vehicles. The traffic prediction apparatus comprises acquisition means for acquiring waterfall data comprising a generation position of a vibration, a generation time of the vibration and an amplitude of the vibration generated by a vehicle traveling on a road, pre-processing means for transforming the acquired waterfall data, generation means for training a portion of the plurality of processed waterfall data and at least one corresponding ground truth traffic property used as plurality of labels to generate a trained model, wherein the ground truth may be obtained from a secondary acquisition means, and prediction means for predicting at least one traffic property for a processed waterfall data.

8. 发明申请

US20220170766A1 OPTICAL FIBER SENSOR, AND MONITORING SYSTEM 有权
公开(公告)号：US20220170766A1
公开(公告)日：2022-06-02
申请号：US17602358
申请日：2019-04-16
申请人： NEC Corporation
发明人： Tomoyuki HINO , Akihiro TANAKA , Chaitanya Prasad NARISETTY
IPC分类号： G01D5/353 , G01H9/00
摘要： According to one example embodiment, an optical fiber sensor includes an optical fiber cable and a device body configured to cause an optical pulse signal to be incident on the optical fiber cable and identify, from intensity change of backscattered light of the incident optical pulse signal and an arrival time of the backscattered light, a prescribed environmental change having occurred in a vicinity of the optical fiber cable and an occurrence location of the environmental change, in which the device body performs correction of a sensing location on the optical fiber cable, based on environmental change information including the identified occurrence location and installation location information of the optical fiber cable.

9. 发明申请

US20220060257A1 OPTICAL NETWORK SYSTEM, OPTICAL NODE DEVICE, AND OPTICAL NETWORK CONTROL METHOD 有权
公开(公告)号：US20220060257A1
公开(公告)日：2022-02-24
申请号：US17519717
申请日：2021-11-05
申请人： NEC Corporation
发明人： Tomoyuki HINO , Akio Tajima , Hitoshi Takeshita , Shinsuke Fujisawa
IPC分类号： H04B10/079 , H04J14/02
摘要： If wavelength defragmentation is performed during the operation of an optical network, an instantaneous interruption of a network arises; consequently, data are lost; therefore, an optical network control method according to an exemplary aspect of the present invention includes monitoring a data volume of a client signal to be transmitted using a plurality of optical subcarriers; and performing synchronously, depending on a variation in the data volume, an optical subcarrier changing process of changing an active optical subcarrier, of the plurality of optical subcarriers, to be used for transmitting the client signal, and a remapping process of remapping the client signal onto an active optical subcarrier after having been changed.

10. 发明申请

US20190037288A1 OPTICAL NETWORK CONTROLLER AND METHOD OF SETTING OPTICAL PATH 审中-公开
公开(公告)号：US20190037288A1
公开(公告)日：2019-01-31
申请号：US16077136
申请日：2017-02-08
申请人： NEC CORPORATION
发明人： Shinsuke FUJISAWA , Akio TAJIMA , Hitoshi TAKESHITA , Tomoyuki HINO
IPC分类号： H04Q11/00
摘要： In the elastic optical network, there has been the problem that processing steps increase that are required to re-optimize client signals to be concentrated; therefore, an optical network controller according to an exemplary aspect of the present invention includes reallocation detection means for monitoring an operation status of at least one of an optical communication channel and an optical node device that constitute an optical network, and determining, based on the operation status, whether or not to reallocate a client signal accommodated in an optical path set in the optical network; design-candidate exclusion means for designating, as a design exclusion object, at least one of the optical communication channel and the optical node device that are associated with an optical path targeted for reallocation that accommodates the client signal that the reallocation detection means has determined to reallocate; optical path design means for determining an alternative route for the optical path targeted for reallocation from among routes with the exception of the design exclusion object; traffic reference means for determining the client signal to be reaccommodated in an optical path on the alternative route, referring to demand traffic accommodated in the optical path targeted for reallocation; and line concentration design means for constituting line-concentration traffic in which traffic having been allocated to the alternative route and the demand traffic are concentrated, wherein the traffic reference means determines a reallocation optical path in which an optical path candidate with number of occupied wavelength slots increasing is excluded from optical path candidates on the alternative route, and the optical path design means determines wavelength allocation of the reallocation optical path so as to accommodate the line-concentration traffic.

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