Traffic Selfsimilarity

1
Traffic Self-similarity

• LAN, WAN, WWW
• new traffic P2P file sharing

2
P2P Traffic Characteristics?

• more elephants, heavier tails?
• measurement, no server view
• concurrent downloading
• file size distribution vs. transferred segment
  size distribution
• batch arrivals of sessions
• spatial correlation in addition to temporal
  correlation?
• and ...

3
Explanation of Multi-timescale Behavior

• open loop model
• ON-OFF source with Pareto type of periods
• M/G/? model
• close loop model
• TCP dynamics explain short time scale behavior
• interaction between a large number TCP flows may
  lead to aggregate rate fluctuations over longer
  time scales.
• combined explanation?
• open loop and close loop
• network level, flow level and packet level?
• MHOP model different levels of network stack,
  self-similarity w/o pareto
• identify regions of interests
• time-scales of interest
• power waist

4
Implications on Network Practice

• how important is self-similarity to buffer
  dimensioning?
• low delay requires small buffer
• low loss achieved by over-provisioning in core
• congestion control
• explore self-similarity to predict traffic?
• web caching, web server scheduling?
• and...