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    • 7. 发明授权
    • Packet flow control method and device
    • 分组流控制方法和设备
    • US07039013B2
    • 2006-05-02
    • US10029976
    • 2001-12-31
    • Jussi RuutuDongmei ZhangYu ShiRenaud CunyJlan MaKhiem LeGhassan Naim
    • Jussi RuutuDongmei ZhangYu ShiRenaud CunyJlan MaKhiem LeGhassan Naim
    • H04L1/00
    • H04W28/14H04L47/762H04L49/9084H04W28/0205H04W28/08H04W72/04H04W72/12H04W84/04
    • The present invention relates to a method and network node for controlling packet flow in a buffer means (13; 14) of a network node of a data network, wherein a nominal capacity is assigned to each data flow, and an additional or free capacity is shifted from a first flow portion to a second flow portion when a new data packet of said second flow portion has been received and said nominal capacity has been exceeded. The nominal capacity may be an upper buffer memory limit used for controlling queuing of data packets in a buffer memory (13) of said buffer means, wherein the memory space of the buffer memory (13) is shared between a plurality of channels allocated to respective packet data connections. Then, the free capacity corresponds to a memory space shifted from a first channel to a second channel, when a new data packet of the second channel has been received and not enough memory space is available for the second channel. Thus, a dynamic buffer-sharing mechanism is provided which reduces the number of packet drops in the buffer memory (13) during congestion and improves network throughput. Alternatively, the nominal capacity may be a nominal flow rate at which data flow traffic is guaranteed in a QoS scheduling algorithm. Then, a residual rate corresponding to the difference between the nominal flow rate and an instantaneous traffic is shifted between flow portions of a buffer means controlled by the scheduling algorithm to maximize total system throughput.
    • 本发明涉及一种用于控制数据网络的网络节点的缓冲器装置(13; 14)中的分组流的方法和网络节点,其中标称容量被分配给每个数据流,并且附加或空闲容量是 当已经接收到所述第二流部分的新数据分组并且已经超过了所述额定容量时,从第一流部分移动到第二流部分。 标称容量可以是用于控制所述缓冲器装置的缓冲存储器(13)中的数据分组排队的高缓冲存储器限制,其中缓冲存储器(13)的存储器空间在分配给相应的多个通道之间共享 分组数据连接。 然后,当接收到第二信道的新数据分组并且没有足够的存储器空间可用于第二信道时,可用容量对应于从第一信道移动到第二信道的存储器空间。 因此,提供了一种动态缓冲器共享机制,其减少了拥塞期间缓冲存储器(13)中的分组丢弃数量,并且提高了网络吞吐量。 或者,标称容量可以是在QoS调度算法中保证数据流业务的标称流量。 然后,与由调度算法控制的缓冲装置的流量部分之间,与标称流量和瞬时流量之间的差值相对应的剩余率在总体系统吞吐量最大化之间移动。