6
V. Liberatore
Pervasive Computing
QoS and Congestion
Objectives
n
QoS protects from cross-
traffic
n
QoS does not protect from
failures, interferences
n
But in some cases, it does
Possible strategies
n
Priorities
n
Reservation
n
Weighted Fair Queuing
Controller 1
Controller 2
Plant 1
Plant 2