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Table 2 Variables of the feedback control scheme

From: Incorporate intelligence into the differentiated services strategies of a Web server: an advanced feedback control approach

  AD RD
Reference W k Desired delay of class k Desired delay ratio between class k and k - 1
Output C k (V) Measured delay of class k Measured delay ratio between class k and k - 1
Control input B k (U) Process budget of class k Ratio between the process budgets of classes k and k