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