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公开(公告)号:US07574506B1
公开(公告)日:2009-08-11
申请号:US11904086
申请日:2007-09-26
申请人: Nicholas G. Duffield , Albert Gordon Greenberg , John G. Klincewicz , Matthew Roughan , Yin Zhang
发明人: Nicholas G. Duffield , Albert Gordon Greenberg , John G. Klincewicz , Matthew Roughan , Yin Zhang
IPC分类号: G06F15/173
CPC分类号: H04L43/00 , H04L41/0213 , H04L43/0882
摘要: A method and apparatus for the estimation of traffic matrices in a network are disclosed.
摘要翻译: 公开了一种用于估计网络中的业务矩阵的方法和装置。
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公开(公告)号:US20090016234A1
公开(公告)日:2009-01-15
申请号:US12236369
申请日:2008-09-23
申请人: Nicholas Duffield , Carsten Lund , Subhabrata Sen , Yin Zhang , Sumeet Singh
发明人: Nicholas Duffield , Carsten Lund , Subhabrata Sen , Yin Zhang , Sumeet Singh
IPC分类号: G06F11/30
CPC分类号: H04L63/1425 , H04L29/12801 , H04L61/6004 , H04L63/1441 , H04L63/1458 , Y10S707/99945 , Y10S707/99948
摘要: An efficient streaming method and apparatus for detecting hierarchical heavy hitters from massive data streams is disclosed. In one embodiment, the method enables near real time detection of anomaly behavior in networks.
摘要翻译: 公开了一种用于从海量数据流检测分层重击打者的有效的流传输方法和装置。 在一个实施例中,该方法能够近似实时地检测网络中的异常行为。
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公开(公告)号:US07228025B1
公开(公告)日:2007-06-05
申请号:US10698561
申请日:2003-10-31
申请人: Johnny Zhong , Yin Zhang , Steve Wang , Ping Xie , Kevin Zhang
发明人: Johnny Zhong , Yin Zhang , Steve Wang , Ping Xie , Kevin Zhang
CPC分类号: G02B6/2937 , G02B6/29386 , H04J14/02
摘要: A thin film interleaver device is disclosed. The thin film interleaver includes thin film optics. The thin film(s) are formed such that they reflect one group of wavelengths while allowing a second group of wavelengths to pass through the thin film(s). The thin film(s) exhibit a flat top frequency response across the channel bandwidths of the multiplexed signal for which the thin film filter is designed such that the thin film interleaver is less sensitive to wavelength drift and temperature variations.
摘要翻译: 公开了一种薄膜交织器件。 薄膜交织器包括薄膜光学器件。 薄膜形成为使得它们反射一组波长,同时允许第二组波长穿过薄膜。 该薄膜在多路复用信号的通道带宽上表现出平坦的顶频响应,薄膜滤波器被设计成使得薄膜交织器对波长漂移和温度变化较不敏感。
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公开(公告)号:US07042571B2
公开(公告)日:2006-05-09
申请号:US10689340
申请日:2003-10-20
申请人: Steve Wang , Yin Zhang , Ming Shi , Johnny Zhong
发明人: Steve Wang , Yin Zhang , Ming Shi , Johnny Zhong
IPC分类号: G01B9/02
CPC分类号: H04J14/02
摘要: An interleaver device and associated methods of manufacturing and calibration that use a laser bending technique to adjust the relative position of interferometers of the interleaver. The interleaver device includes a laterally divided housing with two lateral portions separated by supports. The supports are web like structures, the length of which can be adjusted in a predictable or measurable manner in response to a laser beam. The laser bending calibration and manufacturing technique uses a laser and a feedback and control system to adjust the spacing and angular relation between the lateral portions by partially melting one or more of the supports. The feedback and control system includes an optical detector, a computer, and a positioning system. This combination of components allows the interleaver device to be calibrated to precisely adjust the separation between channels within a WDM optical signal.
摘要翻译: 一种交织器装置和相关的制造和校准方法,其使用激光弯曲技术来调整交织器的干涉仪的相对位置。 交织器装置包括横向分开的壳体,其具有由支撑件分开的两个侧向部分。 支撑件是网状结构,其长度可以响应于激光束以可预测或可测量的方式进行调整。 激光弯曲校准和制造技术使用激光器和反馈和控制系统来通过部分地熔化一个或多个支撑件来调节侧面部分之间的间隔和角度关系。 反馈和控制系统包括光学检测器,计算机和定位系统。 这种组件的组合允许对交织器设备进行校准,以精确地调整WDM光信号内的通道之间的间隔。
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公开(公告)号:US20050182849A1
公开(公告)日:2005-08-18
申请号:US10781542
申请日:2004-02-17
IPC分类号: H04L12/56 , G06F15/173 , G06F15/16
CPC分类号: H04L45/125 , H04L45/04 , H04L45/124 , H04L45/22 , H04L45/24 , H04L45/70 , H04L47/10 , H04L47/11 , H04L47/122 , H04L47/125 , H04L47/20
摘要: A method for balancing traffic across paths connecting a network to the Internet using a fractional allocation strategy for distributing the traffic from a congested selected path. The strategy includes: (a) associating the paths j with a counter i; (b) calculating the total initial selected path overload; (c) calculating the selected path load, wherein the load is equal to the initial selected path overload less the sum of the low capacity boundary for i path(s); (d) calculating the portion of the traffic on the selected path to be distributed using a bi-sectional search strategy; (e) distributing a portion of the traffic on the selected path to the other paths; and (f) stopping if there are no more paths (i=j), otherwise increasing the numerical value of the counter by one (1) and go to step (c).
摘要翻译: 一种用于使用分数分配策略来平衡通过连接网络到因特网的路径之间的流量的方法,用于分配来自拥塞的所选路径的流量。 该策略包括:(a)将路径j与计数器i相关联; (b)计算总初始选择路径过载; (c)计算所选择的路径负载,其中负载等于初始选择的路径过载,减去i路径的低容量边界的和; (d)使用双向搜索策略计算要分配的所选路径上的业务部分; (e)将所选路径上的一部分业务分发到其他路径; 和(f)如果没有更多的路径(i = j)停止,否则将计数器的数值增加1(1)并转到步骤(c)。
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公开(公告)号:US20050078909A1
公开(公告)日:2005-04-14
申请号:US10969081
申请日:2004-10-20
申请人: Johnny Zhong , Steve Wang , Yin Zhang
发明人: Johnny Zhong , Steve Wang , Yin Zhang
CPC分类号: G02B6/29361 , G02B6/29383 , G02B6/29386 , G02B6/32
摘要: This disclosure is concerned with optical add/drop modules. In one example, he drop portion of the add/drop module is accomplished by using thin film filters or thin film interleavers. The add portion of the add/drop module uses fused fiber interleavers for the less critical stages of the multiplexing process. In a final stage, fused fiber interleavers can be placed in series. A thin film interleaver having a flattop frequency response may also be used for the critical stage where the multiplexed channels are more closely spaced. The frequency response of the thin film interleaver is relatively constant across a bandwidth of a channel while having a drop off at the channel edge to reduce cross talk.
摘要翻译: 本公开涉及光插拔模块。 在一个示例中,加/减模块的下降部分通过使用薄膜滤波器或薄膜交织器来实现。 加/减模块的添加部分使用融合光纤交织器用于复用过程的不太关键的阶段。 在最后阶段,熔融纤维交织器可以串联放置。 具有平顶频率响应的薄膜交织器也可以用于复用信道更紧密间隔的关键阶段。 薄膜交织器的频率响应在通道的带宽上相对恒定,同时在信道边缘处掉落以减少串扰。
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公开(公告)号:US09444684B2
公开(公告)日:2016-09-13
申请号:US12887830
申请日:2010-09-22
申请人: Jia Wang , Zihui Ge , Ajay Mahimkar , Aman Shaikh , Jennifer Yates , Yin Zhang , Joanne Emmons
发明人: Jia Wang , Zihui Ge , Ajay Mahimkar , Aman Shaikh , Jennifer Yates , Yin Zhang , Joanne Emmons
IPC分类号: G06F15/177 , H04L12/24
CPC分类号: H04L41/0853 , H04L41/0869 , H04L41/142
摘要: A system and method identify a network upgrade from a data set including a plurality of configuration sessions. The system performs the method by receiving a plurality of configuration sessions. Each of the configuration sessions comprises a plurality of configuration commands. The configuration commands are generated by a same user identifier and within a time threshold. The method further includes identifying one of the configuration sessions as a network upgrade session. The identification is based on a rareness of the configuration session or a skewness of the configuration session.
摘要翻译: 系统和方法从包括多个配置会话的数据集中识别网络升级。 系统通过接收多个配置会话来执行该方法。 每个配置会话包括多个配置命令。 配置命令由相同的用户标识符和时间阈值生成。 该方法还包括将配置会话之一识别为网络升级会话。 该标识基于配置会话的稀有性或配置会话的偏度。
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公开(公告)号:US08774023B2
公开(公告)日:2014-07-08
申请号:US12887903
申请日:2010-09-22
申请人: Jia Wang , Zihui Ge , Ajay Mahimkar , Aman Shaikh , Jennifer Yates , Yin Zhang , Joanne Emmons
发明人: Jia Wang , Zihui Ge , Ajay Mahimkar , Aman Shaikh , Jennifer Yates , Yin Zhang , Joanne Emmons
IPC分类号: H04L12/26
CPC分类号: H04L43/16 , H04L41/082 , H04L43/0829 , H04L43/0852
摘要: A system and method are provided for identifying a change point in a set of data. The system performs the method by receiving a set of data. The data indicates a plurality of performance measurements from a measurement point in a network. Each of the plurality of measurements represents a single type of performance measurement made at the measurement point at each of a corresponding plurality of points in time. The method also includes dividing the set of data into a plurality of data points in a chronological order. Each data point has a value corresponding to the performance measurements. The method also includes ranking the data points in an ascending order, calculating a cumulative sum for each of the data points, calculating a change score for the set of data points. A change point is identified in the data set if the change score exceeds a predetermined confidence level.
摘要翻译: 提供了用于识别一组数据中的变化点的系统和方法。 系统通过接收一组数据来执行该方法。 数据表示来自网络中的测量点的多个性能测量。 多个测量中的每一个表示在相应的多个时间点的每一个处的测量点进行的单一类型的性能测量。 该方法还包括按照时间顺序将数据集合划分成多个数据点。 每个数据点都具有对应于性能测量值。 该方法还包括以升序对数据点进行排序,计算每个数据点的累积和,计算该组数据点的改变得分。 如果改变得分超过预定的置信水平,则在数据集中识别变化点。
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公开(公告)号:US08477597B2
公开(公告)日:2013-07-02
申请号:US12787411
申请日:2010-05-26
IPC分类号: G01R31/08
摘要: A method and system for resilient routing reconfiguration, which provides provably congestion-free rerouting under a large number of failure scenarios and achieves efficiency and flexibility in accommodating different performance requirements, is disclosed. The method of embodiments comprises an offline precomputation phase and an online reconfiguration phase. Embodiments of the present invention also provide a number of useful functionalities, including (i) coping with traffic variations, (ii) supporting realistic failure scenarios, (iii) accommodating prioritized traffic with different protection levels, and (iv) balancing the trade-off between performance and resilience.
摘要翻译: 公开了一种用于弹性路由重配置的方法和系统,其在大量故障场景下提供可证明的无拥塞重新路由,并且实现了适应不同性能要求的效率和灵活性。 实施例的方法包括离线预计算阶段和在线重新配置阶段。 本发明的实施例还提供了许多有用的功能,包括(i)应对流量变化,(ii)支持现实的失败情况,(iii)容纳具有不同保护等级的优先级流量,以及(iv)平衡权衡 性能与弹性之间。
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公开(公告)号:US08005328B2
公开(公告)日:2011-08-23
申请号:US10724426
申请日:2003-11-26
申请人: Johnny Zhong , Steve Wang , Yin Zhang
发明人: Johnny Zhong , Steve Wang , Yin Zhang
IPC分类号: G02B6/28
CPC分类号: G02B6/29361 , G02B6/29383 , G02B6/29386 , G02B6/32
摘要: A WDM add/drop module. The drop portion of the add/drop module is accomplished by using thin film filters or thin film interleavers. The add portion of the add/drop module uses fused fiber interleavers for the less critical stages of the multiplexing process. In a final stage, fused fiber interleavers can be placed in series. A thin film intervleaver having a flattop frequency response may also be used for the critical stage where the multiplexed channels are more closely spaced. The frequency response of the thin film interleaver is relatively constant across a bandwith of a channel while having a drop off at the channel edge to reduce cross talk.
摘要翻译: WDM添加/删除模块。 通过使用薄膜滤波器或薄膜交织器来实现加/减模块的下降部分。 加/减模块的添加部分使用融合光纤交织器用于复用过程的不太关键的阶段。 在最后阶段,熔融纤维交织器可以串联放置。 具有平顶频率响应的薄膜间隔器也可以用于多路复用通道更紧密间隔的关键阶段。 薄膜交织器的频率响应在通道的带宽上相对恒定,同时在通道边缘处下降以减少串扰。
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