7
V. Liberatore
Pervasive Computing
Congestion: Example
Scenario
n
One controller
Discrete LQR
Assumes 50ms sampling
rate
Assumes no delays
n
n
inverted pendulum
n
Bottleneck: T1 line
n
RTT: 3ms
n
Plot response over time
Congestion
n
When more plants are
added
n
Scalability
controller
plant
plant
plant
plant
switch
1.5Mbps