The model for a specific linearized TCP/IP computer network queue, working under a random early detection (RED) algorithm, has been modeled using the block diagram of Figure P11.1, where G(s) = M(s)P(s), with

and

Also, L is a parameter to be varied (Hollot, 2001).

a. Adjust L to obtain a 15% overshoot in the transient response for step inputs.

b. Verify Part a with a Simulink unit step response simulation.

                                      

0.005L M(s) %3D s+ 0.005