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    Adding link aggregation group to hitless protection in packet switched networks
    2.
    发明授权
    Adding link aggregation group to hitless protection in packet switched networks 有权
    将分组交换网络中的链路聚合组添加到无中断保护

    公开(公告)号：US09537757B2

    公开(公告)日：2017-01-03

    申请号：US14454957

    申请日：2014-08-08

    Applicant: NEC Laboratories America, Inc.

    Inventor： Junqiang Hu ,  Yoshinobu Ooto ,  Kazuo Takagi ,  Yoshiaki Aono ,  Ting Wang

    IPC: H04L12/707 ,  H04L12/735 ,  H04L12/709 ,  H04L12/703 ,  H04L12/801

    CPC classification number: H04L45/22 ,  H04L45/1283 ,  H04L45/245 ,  H04L45/28 ,  H04L47/34 ,  Y02D50/30

    Abstract: A method is provided for traffic aggregation in a hitless protected packet switched network having source 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 includes generating, using a processor, internal marker packets at working and protecting input ports of the source nodes. Each market packet represents a respective marker time period. The method includes transmitting the marker packets to working and protecting output ports of the source nodes, by the working and protecting input ports of the source nodes. The method includes selectively aggregating, at each of the working and protecting output ports of the source nodes, hitless traffic sent from different working and protecting inputs ports of the source nodes to provide an aggregated flow there from, responsive to the marker packets.

    Abstract translation: 提供了一种用于具有源和目的地节点的无中继保护分组交换网络中的业务聚合的方法。 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。 该方法包括在工作和保护源节点的输入端口时生成使用处理器的内部标记分组。 每个市场包代表相应的标记时间段。 该方法包括通过工作和保护源节点的输入端口，将标记数据包发送到工作和保护源节点的输出端口。 该方法包括在源节点的每个工作和保护输出端口选择性地聚合来自源节点的不同工作和保护输入端口的无中断业务，从而响应于标记分组来提供聚合流。

    Variable bit-rate QPSK transmitter and method employing polarization manipulation
    4.
    发明授权
    Variable bit-rate QPSK transmitter and method employing polarization manipulation 有权
    可变比特率QPSK发射机和采用极化处理的方法

    公开(公告)号：US08953939B2

    公开(公告)日：2015-02-10

    申请号：US13667708

    申请日：2012-11-02

    Applicant: NEC Laboratories America, Inc.

    Inventor： Shaoliang Zhang ,  Dayou Qian ,  Junqiang Hu ,  Lei Xu ,  Ting Wang

    IPC: H04J14/06 ,  H04B10/04 ,  H04B10/12 ,  H04B10/50

    CPC classification number: H04J14/06 ,  H04B10/5055

    Abstract: Disclosed are universal QPSK transmitter structures and methods for generating different QPSK signals exhibiting different polarization schemes, namely PolMux, PolMod and PolSw. The bit rate of the generated signals is variable, thereby allowing the transmitter to adjust to varying network traffic conditions. Advantageously, the generated signals may be detected by analog receivers (PolSw-QPSK) and coherent receivers (PolMux-QPSK, PolMod-QPSK, and PolSw-QPSK).

    Abstract translation: 公开了用于产生表现出不同偏振方案的不同QPSK信号的通用QPSK发射机结构和方法，即PolMux，PolMod和PolSw。 所产生的信号的比特率是可变的，从而允许发射机适应不同的网络业务状况。 有利地，所产生的信号可以由模拟接收机（PolSw-QPSK）和相干接收机（PolMux-QPSK，PolMod-QPSK和PolSw-QPSK）来检测。

    Optical Network Switching Using N:N Transponder Through Time-Domain Multiplexing and Burst Mode Access
    5.
    发明申请
    Optical Network Switching Using N:N Transponder Through Time-Domain Multiplexing and Burst Mode Access 有权
    使用N：N应答器通过时域复用和突发模式访问进行光网络交换

    公开(公告)号：US20140308037A1

    公开(公告)日：2014-10-16

    申请号：US14243068

    申请日：2014-04-02

    Applicant: NEC Laboratories America, Inc.

    Inventor： Junqiang Hu ,  Ting Wang

    IPC: H04J14/02 ,  H04J14/08

    CPC classification number: H04J14/0257 ,  H04J14/0256 ,  H04J14/0267 ,  H04J14/086

    Abstract: A network switch is disclosed with each port having the function of: electrical processing and optical modulation; electrical processing has the ability to identify packet or frame destination; burst mode transmission and receiving capability; uses its pre-assigned time slot to send to the corresponding destination, or receive from the expected source.

    Abstract translation: 公开了一种网络交换机，每个端口具有以下功能：电处理和光调制; 电子处理能够识别数据包或帧目的地; 突发模式发送和接收能力; 使用其预分配的时隙发送到相应的目的地，或从预期来源接收。

    Polarization Switching for Optical Fiber Communications
    6.
    发明申请
    Polarization Switching for Optical Fiber Communications 有权
    光纤通信的极化切换

    公开(公告)号：US20130089327A1

    公开(公告)日：2013-04-11

    申请号：US13649161

    申请日：2012-10-11

    Applicant: NEC Laboratories America, Inc. ,  NEC Corporation

    Inventor： Shaoliang Zhang ,  Lei Xu ,  Junqiang Hu ,  Fatih Yaman ,  Ting Wang ,  Yoshihisa Inada ,  Takaaki Ogata ,  Yasuhiro Aoki

    IPC: H04J14/06 ,  H04J14/08

    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。

    Saturation caused phase jump avoidance in DAS
    7.
    发明授权
    Saturation caused phase jump avoidance in DAS 有权

    公开(公告)号：US11674827B2

    公开(公告)日：2023-06-13

    申请号：US17511381

    申请日：2021-10-26

    Applicant: NEC Laboratories America, Inc.

    Inventor： Junqiang Hu

    IPC: G01D5/353

    CPC classification number: G01D5/35361

    Abstract: Aspects of the present disclosure describe systems methods and structures for avoiding saturation caused phase jump in systems that extract information from the phase of a complex sequence and exhibit an overflow or “spike” in the output of a high-pass filter. Operationally, during phase unwrapping—when an output signal exceeds a supported range—it is adjusted to be back in range by adding N·2π, to a phase where N is negative or positive integer, depending on the direction to be adjusted.

    Rayleigh fading mitigation via short pulse coherent distributed acoustic sensing with multi-location beating-term combination
    8.
    发明授权
    Rayleigh fading mitigation via short pulse coherent distributed acoustic sensing with multi-location beating-term combination 有权

    公开(公告)号：US11566937B2

    公开(公告)日：2023-01-31

    申请号：US16879505

    申请日：2020-05-20

    Applicant: NEC Laboratories America, Inc.

    Inventor： Ezra Ip ,  Yue-Kai Huang ,  Junqiang Hu ,  Shuji Murakami

    IPC: G01H9/00 ,  G01B9/02015 ,  G01B9/02 ,  G01D5/353 ,  G01V1/18

    Abstract: Aspects of the present disclosure describe Rayleigh fading mitigation via short pulse coherent distributed acoustic sensing with multi-location beating-term combination. In illustrative configurations, systems, methods, and structures according to the present disclosure employ a two stage modulation arrangement providing short interrogator pulses resulting in a greater number of sensing data points and reduced effective sectional length. The increased number of data points are used to mitigate Rayleigh fading via a spatial combining process, multi-location-beating combining (MLBC) which uses weighted complex-valued DAS beating results from neighboring locations and aligns phase signals of each of the locations, before combining them to produce a final DAS phase measurement. Since Rayleigh scattering is a random statistic, the MLBC process allows capture of different statics from neighboring locations with correlated vibration/acoustic signal. The combined DAS results minimize a total Rayleigh fade, in both dynamic fading and static fading scenarios.

    Mechanism for remote safety monitoring sensor with low-power consumption communication
    9.
    发明授权
    Mechanism for remote safety monitoring sensor with low-power consumption communication 有权

    公开(公告)号：US09807476B2

    公开(公告)日：2017-10-31

    申请号：US15090653

    申请日：2016-04-05

    Applicant: NEC Laboratories America, Inc.

    Inventor： Junqiang Hu ,  Ting Wang

    IPC: G08C19/04 ,  H04Q9/00

    CPC classification number: H04Q9/00 ,  H04Q2209/10 ,  H04Q2209/40 ,  H04Q2209/823 ,  H04Q2209/883

    Abstract: Disclosed is a sensing platform including a server; one or more remote sensing systems coupled to the server, one or more local sensor(s) for target object monitoring; a wireless module coupled to a network through wireless a link; and a processor to read data from local sensor(s) and communicate information through the network using the wireless module. The sensing system has a low power consumption mode in which the processor puts the wireless module and the local sensor(s) in sleep mode or powered off. The processor has a sleep or deep sleep mode, a power-off mode, and a wake up mode, and the local sensor(s) are accessed at a frequency 1/T1 and the wireless module is at lower frequency 1/Tw where Tw>T1, and the server receives monitored value from remote sensing systems and interacts with the remote sensing system.

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