4) Cross-layer Study of Internet Traffic Burstiness

A Study of the Impact of Application-layer, transport-layer, and network-layer factors on Internet Traffic Burstiness

The issue of provisioning Internet routers with small buffers is receiving considerable attention in the networking research community. Most of existing work, though, studies only the interaction between the TCP transport protocol and router queues. We believe that several other factors—including the application/user data-generation behavior, the size of data transferred, the network topology, and the level of traffic aggregation—can significantly influence traffic burstiness as well. In this project, we plan to experimentally study the impact of each of such factors.Specifically, we will use an extensive lab testbed to recreate Internet-derived traffic. We will then control and study the impact on router queues of several factors related to the application-layer, transport-layer, as well as the network-layer.Research-components/open-issues in this project:

  • The primary issue to be addressed in this project is that of designing an empirical methodology to isolate the impact of each of the factors we are interested in. The primary constraint would be to do so for each factor while retaining realism in the way the other factors are incorporated.
  • A second issue would be to design metrics and analysis techniques that can effectively quantify the impact of each factor. Based on our past work, we expect wavelet-based analysis to play a crucial role in this.