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    • 62. 发明公开
    • Monitoring traffic in packet networks
    • Paketnetzwerken的Überwachungdes Datenverkehrs
    • EP1209861A1
    • 2002-05-29
    • EP00204136.6
    • 2000-11-22
    • Telefonaktiebolaget L M Ericsson (Publ)
    • Henriques, BengtWestberg, Lars
    • H04L12/56
    • H04M15/58H04L2012/5632H04L2012/5636H04L2012/5648H04L2012/5651H04M2215/0188H04M2215/22H04Q11/0478
    • A data packet network comprises a policer module (17) metering the flow in a metering unit (49) and deciding in a decision unit (43) whether arrived packets are to be transmitted or discarded. The flow of transmitted packets is metered by a sliding window procedure having a fixed window length to meter the flow of data packets. The sliding window is divided in a plurality of subwindows of equal length and the sliding window moves by steps corresponding to the length of the subwindows. For each subwindow and for the sliding window counts of transmitted and/or discarded bytes and/or packets are determined and stored in memory cells (C SW ; C 1 , ..., C N ). For an arrived packet the counts of the current subwindow are compared to a maximum value obtained from the counts of the sliding window and an absolute maximum value and based on the result of the comparison, the decision means will transmit or discard the packet. The policer module can also perform soft policing in the case where the packets belong to different traffic classes. Then individual sliding windows having subwindows are used for each traffic class and the counts are calculated for each class. The comparison is in that case made based on a value of the total aggregated flow of packets from the module compared to some maximum value indicating a congestion state. The sliding window procedure using subwindows meters the flow efficiently and is especially useful for allocating transmission resources for traffic of different priorities.
    • 数据分组网络包括计量在计量单元(49)中的流程的策略器模块(17),并且在决策单元(43)中决定是否要发送或丢弃到达的分组。 传输分组的流量由具有固定窗口长度的滑动窗口过程计量,以计量数据分组的流量。 滑动窗口被划分成多个相等长度的子窗口,并且滑动窗口移动与子窗口的长度对应的台阶。 对于每个子窗口和滑动窗口,确定发送和/或丢弃的字节和/或分组的计数,并将其存储在存储单元(CSW; C1,...,CN)中。 对于到达分组,将当前子窗口的计数与从滑动窗口的计数和绝对最大值获得的最大值进行比较,并且基于比较的结果,判定装置将发送或丢弃该分组。 在分组属于不同业务类的情况下,策略模块也可以执行软策略。 然后,对于每个流量类使用具有子窗口的单个滑动窗口,并且为每个类计算计数。 在这种情况下,基于来自模块的分组的总流量的值与指示拥塞状态的一些最大值进行比较。 使用子窗口的滑动窗口过程有效地计量流量,对于为不同优先级的流量分配传输资源尤其有用。