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