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

Journal of Internet Services and Applications

Table 1 Experiments data and corresponding transfer functions

	RD case			AD case
	Class 0	Class 1	Transfer function G(z)	Class 0	Class 1	Transfer function G(z)
Workload A	200	200	$\frac{0.95 z - 0.12}{z^{2} - 0.74 z + 0.37}$	100	400	$\frac{- 0.82 z - 0.52}{z^{2} + 0.13 z + 0.03}$
Workload B	150	250	$\frac{2.28 z + 0.08}{z^{2} - 0.31 z + 0.27}$	150	250	$\frac{- 0.36 z - 0.15}{z^{2} - 0.14 z + 0.05}$
Workload C	300	300	$\frac{0.47 z + 0.21}{z^{2} - 0.56 z + 0.26}$	200	300	$\frac{- 0.49 z - 0.25}{z^{2} - 0.25 z + 0.03}$