Point Process Models of 1/f Noise and Internet Traffic
  We present a simple model reproducing the long-range autocorrelations and the power spectrum of the web traffic. The model assumes the traffic as Poisson flow of files with size distributed according to the power-law. In this model the long-range autocorrelations are independent of the network properties as well as of inter-packet time distribution. 
V. Gontis, B. Kaulakys, J. Ruseckas