Performance and Robustness Analysis of an H 1 Based Flow Controller 1

In a recent work by the authors, an H 1 based ow controller was designed for explicit rate based congestion control in high speed networks. Time delay uncertainties were taken into account when the controller was designed. This paper studies robustness margins, e.g. largest allowable time delay, as functions of a weighting parameter used in the deenition of the H 1 optimization problem. Another issue discussed here is \non-fragile" (i.e. internally robust) implementation of the H 1 controller. Time domain performance is demonstrated via simulations.