The system 4, wherein said QoS event includes {HEAD ~ at least a subset} of link utilization rate, a queue length, or a packet loss rate exceeding {TAIL ~ a predetermined maximum threshold} or falling below a predetermined minimum threshold for at least a predefined time period 
The system 4 , wherein said QoS event includes { HEAD ~ at least a subset } of link utilization rate , a queue length , or a packet loss rate exceeding { TAIL ~ a predetermined maximum threshold } or falling below a predetermined minimum threshold for at least a predefined time period
OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH