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    • 4. 发明申请
    • A MODIFICATION OF POLICING METHODS TO MAKE THEM MORE TCP-FRIENDLY
    • 改变政策方法使其更加TCP友好
    • WO2007124296A2
    • 2007-11-01
    • PCT/US2007066743
    • 2007-04-17
    • CISCO TECH INCPAN RONGBONOMI FLAVIOVARGHESE GEORGE
    • PAN RONGBONOMI FLAVIOVARGHESE GEORGE
    • H04L12/26
    • H04L47/215H04L47/193H04L47/20
    • Various improvements are provided for prior art policing methods, including token bucket methods and virtual time policing methods. Some preferred methods of the invention involve assigning a non-zero drop probability even when the packet would otherwise have been transmitted according to a prior art policing method. For example, a non-zero drop probability may be assigned even when there are sufficient tokens in a token bucket to allow transmission of the packet. A non-zero drop probability may be assigned, for example, when a token bucket level is at or below a predetermined threshold or according to a rate at which a token bucket is being emptied. Some implementations involve treating a token bucket as a virtual queue wherein the number of free elements in the virtual queue is proportional to the number of remaining tokens in the token bucket. Such implementations may involve predicting a future virtual queue size according to a previous virtual size and using this predicted value to calculate a drop probability.
    • 为现有技术的监管方法提供了各种改进,包括令牌桶方法和虚拟时间监管方法。 本发明的一些优选方法涉及分配非零丢弃概率,即使当根据现有技术的监管方法将分组本来已被传输时。 例如,即使在令牌桶中有足够的令牌来允许分组的传输,也可以分配非零丢弃概率。 例如,当令牌桶级别等于或低于预定阈值或者根据令牌桶被清空的速率时,可以分配非零丢弃概率。 一些实现涉及将令牌桶视为虚拟队列,其中虚拟队列中的空闲元素的数量与令牌桶中剩余令牌的数量成比例。 这样的实现可以涉及根据先前的虚拟大小预测未来的虚拟队列大小,并且使用该预测值来计算丢弃概率。