Traffic descriptors for the configuration of leaky bucket policing mechanisms with general two-state on/off arrival processes
Douglas S. Holtsinger, Harry G. Perros · NCSU Libraries Repository (North Carolina State University Libraries) · 1993
The leaky bucket has been widely studied as a policing mechanism for ATM networks, but very little effort has been focused on developing simple traffic descriptors which can be used for configuring the leaky bucket in practical applications.In this paper, we analyze the cell loss probability of the leaky bucket policing mechanism, assuming that the traffic source behaves as a two-state on/off type arrival process with arbitrary and independent distributions for the burst and silence periods.We demonstrate that the leaky bucket policing mechanism can be configured with substantially smaller token pool sizes as limits are placed on the maximum length of the burst period and the minimum length of the silence period.While these limits will lower the amount of traffic "burstiness", we show that traditional indicators of burstiness, such as the squared coefficient of variation of in terarrival times (C 2 ) and the mean burst length, fail to capture changes in burstiness due to changes in the maximum length of the burst period.This suggests that the lSupported in part by BellSouth, GTE Corporation, and NSF and DARPA under cooperative agreement NCR-8919038 with the Corporation for National Research Initiative.maximum burst length of the source should be incorporated into the traffic descriptor as a measure of burstiness.We also propose the dual leaky bucket policing mechanism as a suitable device for policing the behavior of bursty traffic sources, and we approximately analyze the cell loss probability.