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    • 4. 发明授权
    • Method and system for detecting changes in network performance
    • 检测网络性能变化的方法和系统
    • US08774023B2
    • 2014-07-08
    • US12887903
    • 2010-09-22
    • Jia WangZihui GeAjay MahimkarAman ShaikhJennifer YatesYin ZhangJoanne Emmons
    • Jia WangZihui GeAjay MahimkarAman ShaikhJennifer YatesYin ZhangJoanne Emmons
    • H04L12/26
    • H04L43/16H04L41/082H04L43/0829H04L43/0852
    • 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.
    • 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。
    • 5. 发明授权
    • Method and system for resilient routing reconfiguration
    • 弹性路由重配置方法和系统
    • US08477597B2
    • 2013-07-02
    • US12787411
    • 2010-05-26
    • Yin ZhangLili Qiu
    • Yin ZhangLili Qiu
    • G01R31/08
    • H04L45/22H04L45/02H04L45/28H04L45/50
    • 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.
    • 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。
    • 8. 发明授权
    • Optical add/drop module
    • 光分插模块
    • US08005328B2
    • 2011-08-23
    • US10724426
    • 2003-11-26
    • Johnny ZhongSteve WangYin Zhang
    • Johnny ZhongSteve WangYin Zhang
    • G02B6/28
    • G02B6/29361G02B6/29383G02B6/29386G02B6/32
    • 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.
    • 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。
    • 9. 发明申请
    • Vehicular Content Distribution
    • 车载内容分布
    • US20110164562A1
    • 2011-07-07
    • US12983884
    • 2011-01-03
    • Lili QiuYin Zhang
    • Lili QiuYin Zhang
    • H04W4/02
    • H04W72/1236H04W48/04H04W72/1252
    • A system and method provides an electronic content to a vehicle from access point(s) within a network using a controller. The controller divides the electronic content into one or more files wherein each file contains at least one packet, and generates two or more random linear combinations of the packets within each file. For each file, each random linear combination of the packets is replicated to a different access point within the network. The electronic content is provided to the vehicle using at least one of the different access points. The controller can also determine a set of nearest trajectories for the vehicle in a location database that match a recent location history for the vehicle. For each determined nearest trajectory, one or more mobility trajectories are determined for the vehicle, and a set of access points are determined that correspond to the determined mobility trajectories for the vehicle.
    • 系统和方法使用控制器从网络内的接入点向车辆提供电子内容。 控制器将电子内容分成一个或多个文件,其中每个文件包含至少一个分组,并且生成每个文件内的分组的两个或多个随机线性组合。 对于每个文件,分组的每个随机线性组合被复制到网络内的不同接入点。 电子内容使用不同接入点中的至少一个提供给车辆。 控制器还可以确定位置数据库中与车辆的最近位置历史相匹配的车辆的一组最近轨迹。 对于每个确定的最近轨迹,为车辆确定一个或多个移动轨迹,并且确定与确定的车辆的移动轨迹相对应的一组接入点。