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    • 6. 发明授权
    • Network monitoring of behavior probability density
    • 网络监控行为概率密度
    • US08639797B1
    • 2014-01-28
    • US12180243
    • 2008-07-25
    • Xiaohong PanKishor KakatkarDerek SandersRangaswamy JagannathanJing LiuRosanna Lee
    • Xiaohong PanKishor KakatkarDerek SandersRangaswamy JagannathanJing LiuRosanna Lee
    • G06F15/173
    • H04L43/12H04L41/142H04L43/04H04L43/062
    • A network monitoring system maintains both information regarding historical activity of a network, and information regarding emergent activity of the network. Comparison of historical activity of the network with emergent activity of the network allows the system to determine whether network activity is changing over time. The network monitoring system maintains data structures representing a p.d.f. for observable values of network parameters. Recent activity of the network can be compared with both the p.d.f. for historical activity and for emergent activity to aid in determining whether that recent activity is within the realm of normal, and whether network activity is changing over time. The network monitoring system adjusts that information regarding historical activity of a network in response to emergent activity of that network. The network monitoring device determines information regarding time-dependent activity of that network in response to spectral analysis regarding historical activity of that network.
    • 网络监控系统维护关于网络的历史活动的信息和关于网络的紧急活动的信息。 网络的历史活动与网络紧急活动的比较允许系统确定网络活动是否随时间而变化。 网络监控系统维护表示p.d.f.的数据结构。 用于网络参数的可观察值。 网络的最近活动可以与p.d.f. 用于历史活动和紧急活动,以帮助确定最近的活动是否在正常范围内,以及网络活动是否随时间而变化。 网络监控系统根据网络的紧急活动调整有关网络历史活动的信息。 响应于关于该网络的历史活动的频谱分析,网络监视设备确定关于该网络的时间相关活动的信息。
    • 9. 发明授权
    • Network monitoring using virtual packets
    • 使用虚拟数据包进行网络监控
    • US08451731B1
    • 2013-05-28
    • US12180193
    • 2008-07-25
    • Rosanna LeeHong ZhuRangaswamy JagannathanXiaohong PanDerek SandersKishor KakatkarJing Liu
    • Rosanna LeeHong ZhuRangaswamy JagannathanXiaohong PanDerek SandersKishor KakatkarJing Liu
    • H04J1/16H04J3/14G06F15/173
    • H04L41/0645H04L43/00H04L43/022H04L43/026H04L43/04H04L43/0817Y02D50/30
    • A network monitoring device includes a flow processing element, disposed to receive flow information relating to network flows, and to generate a set of virtual packets, each representing a portion of a network flow. The virtual packets are maintained in a time-sequential order, and read by elements of the network monitoring device to generate information relating to network traffic, such as symptoms affecting the communication network, problems affecting the communication network, and otherwise. The network monitoring device randomly samples virtual packets, with at least one of two effects: (1) flow information from traffic reporting devices that are themselves sampling at differing rates can be equalized, with the effect of standardizing information from all of them; (2) the network monitoring device itself can restrict its attention to a fraction of all virtual packets, with the effect of keeping up with a relatively large number of virtual packets.
    • 网络监视设备包括流处理元件,其被设置为接收与网络流相关的流信息,并且生成一组虚拟分组,每组虚拟分组表示网络流的一部分。 虚拟分组以时间顺序的顺序进行维护,并由网络监控设备的元素进行读取,以产生与网络流量相关的信息,例如影响通信网络的症状,影响通信网络的问题等。 网络监控设备随机采样虚拟数据包,具有以下两个效果中的至少一个:(1)流量报告设备本身以不同速率进行采样的流量信息可以均衡化,并使其全部信息标准化; (2)网络监控设备本身可以将其注意力限制在所有虚拟分组的一小部分,具有跟上相对较大数量的虚拟分组的效果。