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    • 44. 发明授权
    • Estimating cardinality distributions in network traffic
    • 估计网络流量中的基数分布
    • US08406132B2
    • 2013-03-26
    • US12129883
    • 2008-05-30
    • Jin CaoAiyou ChenLi Li
    • Jin CaoAiyou ChenLi Li
    • H04J3/14H04L12/28H04L12/66
    • H04L43/00
    • In one embodiment, a method of monitoring a network. The method includes: receiving, from each host of a set of two or more hosts of the network, a corresponding vector of M components constructed based on data packets received at the host during a time period, M being an integer greater than 1; and, based on the constructed vectors, using an expectation-maximization algorithm to estimate a cardinality distribution for the hosts in the set, wherein constructing a vector includes updating a component of the vector of the corresponding host in response to the corresponding host receiving a data packet, the updating including selecting the component for updating by hashing one or more fields of the data packet received by the corresponding host.
    • 在一个实施例中,一种监视网络的方法。 该方法包括:从网络的一组两个或多个主机的每个主机接收在一段时间内基于在主机处接收的数据分组构成的M个分量的相应向量,M是大于1的整数; 并且基于构造的向量,使用期望最大化算法来估计集合中的主机的基数分布,其中构建向量包括响应于相应主机接收到数据来更新对应主机的向量的分量 分组,所述更新包括通过对由相应主机接收的数据分组的一个或多个字段进行哈希来选择用于更新的分量。