公开(公告)号：US20050099953A1

公开(公告)日：2005-05-12

申请号：US10981591

申请日：2004-11-05

Applicant: Roderick MacDonald

Inventor： Roderick MacDonald

IPC: H04B10/08 ,  H04L12/24 ,  H04L12/26

CPC classification number: H04L41/0631 ,  H04L41/0659

Abstract: A method and system for network wide fault isolation in an optical network are described. A single fault in a network can produce a large number of alarms at different points in an optical network. The described method and system identify the root cause alarm while masking all correlated alarms. In the embodiment of the invention, the method and system are based on a wavelength tracker technology allowing identification and tracking of individual channels in the optical network.

Abstract translation: 描述了光网络中网络故障隔离的方法和系统。 网络中的单个故障可能会在光网络中的不同点产生大量报警。 描述的方法和系统识别根本原因报警，同时屏蔽所有相关的报警。 在本发明的实施例中，该方法和系统基于允许对光网络中的各个信道进行识别和跟踪的波长跟踪器技术。

公开(公告)号：US07266606B2

公开(公告)日：2007-09-04

申请号：US09893584

申请日：2001-06-29

Applicant: Sudhakar Ganti ,  Byoung-Joon Lee ,  Barry Mark

Inventor： Sudhakar Ganti ,  Byoung-Joon Lee ,  Barry Mark

IPC: G06F15/173

CPC classification number: H04L47/2408 ,  H04L47/10 ,  H04L47/20 ,  H04L47/2441 ,  H04L47/31

Abstract: Cascaded policing methods and systems are provided which allow lower priority traffic to benefit from otherwise unused capacity allocated to higher priority traffic of a given customer/service with multiple classes of service. The method involves policing packets of a first class in accordance with at least one policing parameter associated with the first class, and policing packets of a second class in accordance with at least one policing parameter associated with the second class in a manner which gives to the second class at least a portion of a traffic throughput afforded to the first class by at least one of said at least one policing parameter, such as a rate guarantee or burst tolerance, associated with the first class of traffic which is not being used by the packets of the first class. The method is easily adapted to an arbitrary number of different traffic classes.

Abstract translation: 提供了级联的监管方法和系统，其允许较低优先级的流量受益于分配给具有多种服务类型的给定客户/服务的较高优先级流量的未使用的容量。 该方法涉及根据与第一类相关联的至少一个管制参数来管理第一类的分组，以及根据给予第二类的方式根据与第二类相关联的至少一个策略参数来管理第二类的分组 通过至少一个所述至少一个策略参数（例如速率保证或突发容忍）提供给第一类的业务吞吐量的至少一部分，所述至少一个策略参数与第一类业务相关联，所述第一流量类别不被 第一类的数据包。 该方法很容易适应任意数量的不同业务类别。

公开(公告)号：US07158723B2

公开(公告)日：2007-01-02

申请号：US10067748

申请日：2002-02-08

Applicant: Ping Wai Wan ,  Derrick Remedios ,  Dongxing Jin ,  Patrick Chilufya Chimfwembe

Inventor： Ping Wai Wan ,  Derrick Remedios ,  Dongxing Jin ,  Patrick Chilufya Chimfwembe

IPC: H04B10/08

CPC classification number: H04J14/0298 ,  H04B10/505 ,  H04B10/50572 ,  H04J14/0227 ,  H04J14/0241 ,  H04J14/0278

Abstract: Channels in an optical WDM network are each identified by at least two dither tones with which the channel is modulated, the dither tones alternating with a predetermined periodicity so that at any instant each channel is modulated by only one dither tone. The dither tones are continuously generated at precise frequencies. Channel detection by detecting the dither tones, for channels having optical powers over a wide dynamic range, makes use of an FFT process which can detect dither tones for high power channels in a single operation. Coherent averaging of FFT results over time is used to detect dither tones for low power channels over multiple FFT operations.

Abstract translation: 光WDM网络中的信道各自由至少两个被调制信道的抖动音调来标识，该抖动音以预定周期交替，使得在任何时刻，每个信道仅被调制一个抖动音。 抖动色调以精确的频率连续生成。 对于具有宽动态范围内的光功率的信道，通过检测抖动音来进行信道检测，利用可以在单个操作中检测高功率信道的抖动音调的FFT处理。 FFT结果的相干平均随时间被用于通过多个FFT操作来检测低功率信道的抖动音调。

公开(公告)号：US20060291860A1

公开(公告)日：2006-12-28

申请号：US11452200

申请日：2006-06-14

Applicant: Walter Carpini ,  John Spicer

Inventor： Walter Carpini ,  John Spicer

IPC: H04B10/20

CPC classification number: H04B10/27 ,  H04B10/275 ,  H04J14/0227 ,  H04J14/0228 ,  H04J14/0238 ,  H04J14/0241 ,  H04J14/0283 ,  H04J14/0284

Abstract: Optical communication networks often incorporate fiber rings or fiber mesh topologies for interconnecting its nodes. Both of these topologies can contain closed optical loops at one or more wavelengths within the optical spectrum. In amplified optical systems, the inherent loss of these optical loops is counteracted by the amplifier gain. Thus, the optical loop may have a net loss that is too low to prevent excessive noise buildup resulting in a lasing fiber loop. The noise that builds up within such amplified systems is dominated by the Amplified Spontaneous Emission (ASE) noise resulting in ASE loops. Such loops can have a serious impact on all wavelengths carried by the fiber and lead to a partial or complete loss of end to end communication due to a severe degradation in signal to noise ratio. This invention provides an effective method and system for avoiding ASE loops in optical communication networks. The method deploys optical seams as well as a unique signature for a wavelength instance for achieving an effective solution that is resilient to errors and failures that may occur on the system both during service creation and normal operation.

Abstract translation: 光通信网络通常包含用于互连其节点的光纤环或光纤网格拓扑。 这两种拓扑结构都可以在光谱内的一个或多个波长处包含封闭的光环路。 在放大光学系统中，这些光环路的固有损耗由放大器增益抵消。 因此，光环路可能具有太低的净损耗，从而不能防止过多的噪声累积，导致激光光纤环路。 在这种放大系统内建立的噪声主要是由放大自发辐射（ASE）噪声导致ASE环路。 由于信噪比严重下降，这种环路可能对光纤承载的所有波长产生严重的影响，并导致端到端通信的部分或完全丢失。 本发明提供了一种避免光通信网络中的ASE环路的有效方法和系统。 该方法部署光学接缝以及用于波长实例的唯一签名，以实现有效解决方案，该解决方案对于在服务创建和正常操作期间可能在系统上可能发生的错误和故障是有弹性的。

公开(公告)号：US07155122B2

公开(公告)日：2006-12-26

申请号：US10263959

申请日：2002-10-04

Applicant: Ping Wai Wan ,  Derrick Remedios ,  Dongxing Jin ,  Patrick Chilufya Chimfwembe

Inventor： Ping Wai Wan ,  Derrick Remedios ,  Dongxing Jin ,  Patrick Chilufya Chimfwembe

IPC: H04B10/08

CPC classification number: H04J14/0227 ,  H04B10/504 ,  H04B10/505 ,  H04B10/50572 ,  H04J14/0241 ,  H04J14/0278 ,  H04J14/0298

Abstract: Channels in an optical WDM network are each identified by at least two dither tones with which the channel is modulated, the dither tones alternating with a predetermined periodicity so that at any instant each channel is modulated by only one dither tone. The dither tones are continuously generated at precise frequencies. Channel detection by detecting the dither tones, for channels having optical powers over a wide dynamic range, makes use of an FFT process which can detect dither tones for high power channels in a single operation. Coherent averaging of FFT results over time is used to detect dither tones for low power channels over multiple FFT operations.

公开(公告)号：US07127508B2

公开(公告)日：2006-10-24

申请号：US10134553

申请日：2002-04-30

Applicant: Kelvin Ross Edmison ,  Hans Frederick Johnsen ,  Walter Joseph Carpini

Inventor： Kelvin Ross Edmison ,  Hans Frederick Johnsen ,  Walter Joseph Carpini

IPC: G06F13/00

CPC classification number: H04L47/283 ,  H04L1/20 ,  H04L41/5003 ,  H04L41/5038 ,  H04L43/50 ,  H04L47/10 ,  H04L47/115

Abstract: The invention provides a method which involves inserting probe packets on a per service basis for transmission on a respective round trip; and for each service using the probe packets to calculate packet latency for probe packets which is representative of packet latency for all packets transmitted for the service. In some embodiments, data plane time stamps are used to accurately time probe latency. The invention also provides a method which involves inserting probe packets on a per service basis for transmission on a respective destination network element; and at the destination network element for a given service using the probe packets to calculate one way packet loss for the service.

Abstract translation: 本发明提供了一种方法，其涉及在每个服务基础上插入探测分组以在相应的往返中传输; 并且对于使用探测分组的每个服务来计算探测分组的分组等待时间，其代表为服务发送的所有分组的分组等待时间。 在一些实施例中，数据平面时间戳用于准确地测量探测延迟。 本发明还提供了一种方法，其涉及在每个服务基础上插入探测分组以在相应的目的地网络单元上传输; 并且使用探测分组在给定服务的目的地网元处计算该服务的单向分组丢失。

公开(公告)号：US07120165B2

公开(公告)日：2006-10-10

申请号：US10143780

申请日：2002-05-14

Applicant: Angelica Grace Emelie Kasvand-Harris ,  Udo Mircea Neustadter ,  Walter Joseph Carpini ,  Barry Ding Ken Mark

Inventor： Angelica Grace Emelie Kasvand-Harris ,  Udo Mircea Neustadter ,  Walter Joseph Carpini ,  Barry Ding Ken Mark

IPC: H04J3/16

CPC classification number: H04L45/50 ,  H04L45/04 ,  H04Q2011/0047 ,  H04Q2011/0077

Abstract: A method and system for allocating and controlling a hierarchy of labels in an MPLS network is provided. The hierarchy of labels, inserted into MPLS packets, is introduced so as to correspond to the hierarchy of sub-flows within a data flow. The labels have the established dependency so that positions of labels in the hierarchy identify a sequence of processing the labels and functions associated with the labels. The system for allocating and controlling the hierarchy of MPLS labels includes a first control plane mapper for releasing available labels, a first controller for assigning the released labels according to the hierarchy, means for transmitting the labels in the network, a second controller for detecting the labels, and a second control plane mapper for maintaining current label dependency within the hierarchy. If required, re-addressing of the hierarchy of labels may be performed to maintain flow-sub-flow association throughout two adjacent networks. In the preferred embodiments on the invention the method of allocating and controlling hierarchy of labels is applied to sub-flows within FA-LSP flows, and to multi-cast services in the network associated with a function of flooding and filtering data within a network node.

公开(公告)号：US07054556B2

公开(公告)日：2006-05-30

申请号：US09972991

申请日：2001-10-10

Applicant: Ping Wai Wan ,  Derrick Remedios ,  Dongxing Jin ,  Patrick Chilufya Chimfwembe

Inventor： Ping Wai Wan ,  Derrick Remedios ,  Dongxing Jin ,  Patrick Chilufya Chimfwembe

IPC: H04B17/00

CPC classification number: H04J14/0298 ,  H04B10/505 ,  H04B10/5051 ,  H04B10/50572 ,  H04J14/0227 ,  H04J14/0241 ,  H04J14/0278

Abstract: Channels in an optical WDM network are each identified by at least two dither tones with which the channel is modulated, the dither tones alternating with a predetermined periodicity so that at any instant each channel is modulated by only one dither tone. The dither tones are continuously generated at precise frequencies. Channel detection by detecting the dither tones, for channels having optical powers over a wide dynamic range, makes use of an FFT process which can detect dither tones for high power channels in a single operation. Coherent averaging of FFT results over time is used to detect dither tones for low power channels over multiple FFT operations.

公开(公告)号：US06987922B2

公开(公告)日：2006-01-17

申请号：US10440247

申请日：2003-05-19

Applicant: Robert Michael Bierman ,  Omayma Moharram ,  Victoria Donnelly

Inventor： Robert Michael Bierman ,  Omayma Moharram ,  Victoria Donnelly

IPC: G02B6/00

CPC classification number: H04B10/077 ,  H04B10/07955 ,  H04J14/0221

Abstract: This invention describes a method for controlling attenuation for a variable optical attenuator (VOA) inserted in an optical path of an optical signal propagating in an optical network, comprising the steps of measuring power of the optical signal at the VOA; comparing the measured power with a target power; and if the measured power differs from the target power, changing the attenuation of the VOA in one or more variable size intervals (VSI) so that the power of the optical signal substantially equals to the target power, wherein the VSI being a function of the measured power and target power. The method further comprises the step of comparing the measured power with a Loss-of-signal (LOS) power threshold, and if the measured power is less than the LOS power threshold, changing the attenuation of the VOA in one or more variable size intervals so that the power of the optical signal substantially higher than the LOS power threshold, wherein the size of the variable interval being a function of the measured power and the LOS power threshold. The method dynamically computes a VSI, updates the VOA setting by said VSI, and manages a combination of open and closed VOA control loops to maintain the target power attenuation of the VOA The corresponding apparatus for controlling the VOA is also provided.

Abstract translation: 本发明描述了一种用于控制插入在光网络中传播的光信号的光路中的可变光衰减器（VOA）的衰减的方法，包括以下步骤：在VOA处测量光信号的功率; 将测量的功率与目标功率进行比较; 并且如果测量的功率与目标功率不同，则以一个或多个可变尺寸间隔（VSI）改变VOA的衰减，使得光信号的功率基本上等于目标功率，其中VSI是 测量功率和目标功率。 该方法还包括将所测量的功率与信号丢失（LOS）功率阈值进行比较的步骤，并且如果所测量的功率小于LOS功率阈值，则在一个或多个可变大小间隔中改变VOA的衰减 使得光信号的功率明显高于LOS功率阈值，其中可变间隔的大小是测量功率和LOS功率阈值的函数。 该方法动态地计算VSI，通过所述VSI更新VOA设置，并且管理开放和关闭的VOA控制环路的组合以维持VOA的目标功率衰减。还提供了用于控制VOA的相应设备。

公开(公告)号：US06963892B2

公开(公告)日：2005-11-08

申请号：US10025870

申请日：2001-12-26

Applicant: Dongxing Jin ,  Ping Wan ,  Leonard Marziliano

Inventor： Dongxing Jin ,  Ping Wan ,  Leonard Marziliano

IPC: G06F17/14 ,  F06F15/00

CPC classification number: G06F17/142

Abstract: A method and apparatus for performing a fast Fourier transform (FFT) computation on large data sizes in real time is provided. The speed at which a FFT is performed is increased by reducing the number of times a Direct Memory Access (DMA) unit must transfer data between an internal memory and an external memory. This is achieved through an algorithm in which data is imported from the external memory into the internal memory and having the CPU perform several calculations on the imported data before it is exported back to the external memory. The imported data in the internal memory has a structure that results in a reduction of the number of times the imported data is swapped between different layers of the internal memory during the FFT computation. Furthermore, the DMA unit import/exports data between the internal memory and the external memory while at the same time having the CPU perform calculations on other data in the internal memory.

Abstract translation: 提供了一种用于对大数据量实时执行快速傅立叶变换（FFT）计算的方法和装置。 通过减少直接存储器访问（DMA）单元必须在内部存储器和外部存储器之间传送数据的次数来增加执行FFT的速度。 这是通过将数据从外部存储器导入内部存储器并使CPU在导出到外部存储器之前对导入的数据执行多个计算的算法来实现的。 内部存储器中导入的数据具有导致FFT计算期间导入的数据在内部存储器的不同层之间交换次数的结构。 此外，DMA单元在内部存储器和外部存储器之间导入/导出数据，同时使CPU对内部存储器中的其他数据执行计算。