“…For circuit holding times that are orders of magnitude larger than the typically packet delays (service times) in the system, the fluctuations of the circuit bandwidth β occur at a significantly longer (slower) time scale than the packet service time scale. That is, the bandwidth β occupied by circuits exhibits significant correlations over time which in turn give rise to complex correlations with the packet queueing delay [80], [90]. For instance, packets arriving during a long period of high circuit bandwidth may experience very long queueing delays and are possibly only served after some circuits release their bandwidth.…”