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21.发明授权公开(公告)号：US09599556B2
公开(公告)日：2017-03-21
申请号：US15089987
申请日：2016-04-04
Applicant: NEC Laboratories America, Inc.
Inventor： Junqiang Hu , Ting Wang
CPC classification number: G01N21/39 , G01J3/28 , G01J3/4338 , G01J2001/4242 , G01N2201/06113 , G01N2201/12
Abstract: A gas sensing system includes a signal generator including a wavelength tunable laser, the signal generator providing a first periodic signal and a second periodic signal, wherein the first periodic signal comprises a wavelength scanning signal and the second periodic signal comprises a modulation signal; an optical signal absorption path which is wavelength selective, wherein the generated signal covers at least one of the absorbance band; a signal detector that uses lock-in detection to detect a second harmonic of the second periodic signal after absorption, the signal detector further including a local reference generator, a multiplier, and a low pass filter; a local reference includes a first path (ref1) that outputs sinusoidal signal with frequency equals to that of the second signal in signal generator, and a second path (ref2) that outputs sinusoidal signal of two times ref1 frequency; and a local reference generator having a first phase shifter that is configurable from 0 to 2π and a second phase shifter that shifts 90-degree, wherein the first phase shifter is for an alignment of ref1 with the modulation signal and the second phase shifter provides 90-degree shifts for ref2 from ref1, wherein the first and second paths (ref1 and ref2) are selected by a switch, wherein the switch uses the first path during initialization and the second path for normal operation.
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公开(公告)号：US09369409B2
公开(公告)日：2016-06-14
申请号：US14307573
申请日：2014-06-18
Applicant: NEC Laboratories America, Inc.
Inventor： Junqiang Hu , Yoshinobu Ooto , Kazuo Takagi , Yoshiaki Aono , Ting Wang
IPC: H04L12/939 , H04L12/721 , H04L12/735 , H04L12/703 , H04L12/723 , H04L12/801
CPC classification number: H04L49/557 , H04L45/1283 , H04L45/28 , H04L45/50 , H04L45/68 , H04L45/70 , H04L47/34
Abstract: A method and system are described for providing hitless protection in a packet switched network having source nodes and destination nodes. The method includes enabling a working path and a protecting path between the source and destination nodes. The working path is non-overlapping with respect to the protecting path. The method further includes replicating traffic in a given one of the source nodes to generate replicated traffic. The method also includes forwarding the traffic and the replicated traffic through a working path and a protecting path, respectively, from the given one of the source nodes to a particular one of the destination nodes. The method additionally includes delivering a hitless-protected service in the particular one of the destination nodes by selecting traffic packets received from either the working path or the protecting path.
Abstract translation: 描述了一种用于在具有源节点和目的地节点的分组交换网络中提供无中断保护的方法和系统。 该方法包括启用源节点和目的节点之间的工作路径和保护路径。 工作路径与保护路径不重叠。 该方法还包括在给定的一个源节点中复制业务以生成复制业务。 该方法还包括将业务和复制的业务分别通过工作路径和保护路径转发到从给定的一个源节点到目标节点的特定一个。 该方法还包括通过选择从工作路径或保护路径接收到的业务分组来递送目标节点中的特定一个节点中的无受保护的服务。
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公开(公告)号：US09094148B2
公开(公告)日：2015-07-28
申请号：US14271539
申请日：2014-05-07
Applicant: NEC Laboratories America, Inc.
Inventor： Philip Nan Ji , Junqiang Hu , Ting Wang
IPC: H04J14/02 , H04B10/079 , H04B10/296
CPC classification number: H04J14/0221 , H04B10/07953 , H04B10/07955 , H04B10/0797 , H04B10/296
Abstract: An optical amplifier that uses software-defined optical networking (SDON) technology, with a centralized controller and flexible physical hardware (the adaptive amplifier here) to optimize the power distribution among different WDM channels in the amplifier. It considers the detailed information for each channel through the information from centralized controller. It is suitable for both single line rate and mixed line rate system, and is suitable for a wavelength division multiplexing WDM system with the same signal type or different signal types.
Abstract translation: 一种使用软件定义光网络（SDON）技术的光放大器，具有集中控制器和灵活的物理硬件（这里的自适应放大器），以优化放大器中不同WDM通道之间的功率分配。 它通过集中控制器的信息来考虑每个通道的详细信息。 适用于单线速率和混合线速系统，适用于具有相同信号类型或不同信号类型的波分复用WDM系统。
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公开(公告)号：US20150071636A1
公开(公告)日：2015-03-12
申请号：US14479398
申请日：2014-09-08
Applicant: NEC Laboratories America, Inc.
Inventor： Junqiang Hu , Konstantinos Kanonakis , Ting Wang , Philip Ji
IPC: H04L12/825 , H04B10/40 , H04Q11/00 , H04L12/815
CPC classification number: H04L47/25 , H04B10/40 , H04L47/225 , H04Q11/0062 , H04Q2011/0086
Abstract: Methods and systems for variable rate control include determining a new communications rate in response to measured data traffic patterns. A receive change message is transmitted to a receiver that triggers the receiver to wait for an end of transmission (EoT) message and to set a new communications rate. A transmit change message is transmitted to a transmitter that triggers the transmitter to send the EoT message to the receiver, to set the new communications rate, and to send a start of transmission (SoT) message to the receiver before resuming data communications.
Abstract translation: 用于可变速率控制的方法和系统包括响应于测量的数据业务模式来确定新的通信速率。 接收改变消息被发送到触发接收机等待传输结束（EoT）消息并设置新的通信速率的接收机。 发送改变消息被发送到发射机，触发发射机向接收机发送EoT消息，设置新的通信速率，并在恢复数据通信之前向接收机发送开始的发送（SoT）消息。
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公开(公告)号：US08917998B2
公开(公告)日：2014-12-23
申请号：US13649161
申请日：2012-10-11
Applicant: NEC Laboratories America, Inc.
Inventor： Shaoliang Zhang , Lei Xu , Junqiang Hu , Fatih Yaman , Ting Wang , Yoshihisa Inada , Takaaki Ogata , Yasuhiro Aoki
IPC: H04B10/04 , H04B10/12 , H04B10/50 , H04J14/06 , H04B10/556
CPC classification number: H04B10/5055 , H04B10/5561 , H04J14/06
Abstract: A method implemented in a transmission apparatus used in an optical fiber communications system for a polarization switched differential quaternary phase-shift keying (DQPSK) signal is disclosed. The method comprises splitting data into two or more data streams, inputting said two or more data streams to 1-bit DQPSK precoders to perform 1-bit DQPSK precoding, and multiplexing inphase outputs of the 1-bit DQPSK precoders to generate a first output; and multiplexing quadrature outputs of the 1-bit DQPSK precoders to generate a second output. Other methods, apparatuses, and systems also are disclosed.
Abstract translation: 公开了一种在用于偏振切换差分四相移键控（DQPSK）信号的光纤通信系统中使用的发送装置中实现的方法。 该方法包括将数据分成两个或更多个数据流，将所述两个或多个数据流输入到1比特DQPSK预编码器以执行1比特DQPSK预编码，以及复用1比特DQPSK预编码器的同相输出以产生第一输出; 以及复用1位DQPSK预编码器的正交输出以产生第二输出。 还公开了其它方法，装置和系统。
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Patent Agency Ranking
公开(公告)号：US08880985B2
公开(公告)日：2014-11-04
申请号：US13646470
申请日：2012-10-05
Applicant: NEC Laboratories America, Inc.
Inventor： Junqiang Hu , Lei Xu , Ting Wang
CPC classification number: H03M13/13 , H03M13/1117 , H03M13/1137 , H03M13/1145 , H03M13/116
Abstract: A Quasi-Cyclic, LDPC, large girth, soft-decision decoder and accompanying methods.
Abstract translation: 准循环，LDPC，大环，软判决解码器及其附带的方法。
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公开(公告)号：US11733088B2
公开(公告)日：2023-08-22
申请号：US17548581
申请日：2021-12-12
Applicant: NEC Laboratories America, Inc.
Inventor： Junqiang Hu , Yue-Kai Huang , Ezra Ip
CPC classification number: G01H9/004 , G01D5/35358
Abstract: A spatial averaging method for a coherent distributed acoustic sensing (DAS) system that employs differential beating and polarization combining of signals for two locations along a length of optical sensing fiber to determine phase change in-between every location along the length of the optical sensing fiber and a moving average using polarization combining output to reduce any Rayleigh fading before phase determination.
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公开(公告)号：US11131578B2
公开(公告)日：2021-09-28
申请号：US16455586
申请日：2019-06-27
Applicant: NEC Laboratories America, Inc.
Inventor： Junqiang Hu , Ting Wang
IPC: G01H9/00
Abstract: Aspects of the present disclosure describe systems, methods and structures employing two-stage detection/analysis for distributed vibration sensing (DVS) along an optical fiber in which a first stage provides pre-processed signal data and the second stage—based on the first stage result—only processes locations that have or might have vibrational activity resulting in increased sensitivity and reduced false alarms.
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公开(公告)号：US20170211937A1
公开(公告)日：2017-07-27
申请号：US15403615
申请日：2017-01-11
Applicant: NEC Laboratories America, Inc.
Inventor： Junqiang Hu , Ting Wang
CPC classification number: G01C21/005 , G01C21/206 , G01S5/0289 , G01S5/14 , G01S13/89 , G01S15/89 , G01S17/89
Abstract: An in-door positioning system for a building includes three or more external positioning devices (EPDs), wherein the EPD is capable of calculating the distance between each other; a floor plan module with a floor plan map of the building, for a building level of interest; and relative positions of the EPDs; and an indoor positioning device positioned at a predetermined distance to each of the EPDs.
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公开(公告)号：US09479446B2
公开(公告)日：2016-10-25
申请号：US14479398
申请日：2014-09-08
Applicant: NEC Laboratories America, Inc.
Inventor： Junqiang Hu , Konstantinos Kanonakis , Ting Wang , Philip Ji
IPC: H04J3/16 , H04J14/00 , H04L12/825 , H04B10/40 , H04Q11/00 , H04L12/815
CPC classification number: H04L47/25 , H04B10/40 , H04L47/225 , H04Q11/0062 , H04Q2011/0086
Abstract: Methods and systems for variable rate control include determining a new communications rate in response to measured data traffic patterns. A receive change message is transmitted to a receiver that triggers the receiver to wait for an end of transmission (EoT) message and to set a new communications rate. A transmit change message is transmitted to a transmitter that triggers the transmitter to send the EoT message to the receiver, to set the new communications rate, and to send a start of transmission (SoT) message to the receiver before resuming data communications.
Abstract translation: 用于可变速率控制的方法和系统包括响应于测量的数据业务模式来确定新的通信速率。 接收改变消息被发送到触发接收机等待传输结束（EoT）消息并设置新的通信速率的接收机。 发送改变消息被发送到发射机，触发发射机向接收机发送EoT消息，设置新的通信速率，并在恢复数据通信之前向接收机发送开始的发送（SoT）消息。
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