Stabilizing transport dynamics of control channels over wide-area networks

Qishi Wu, Nageswara S.V. Rao, Xukang Lu, Ki Hyeon Kwon

Research output: Contribution to journalArticlepeer-review

2 Scopus citations


The next generation large-scale computing applications require network support for interactive visualization, computational steering and instrument control over wide-area networks. In particular, these applications require stable transport streams over wide-area networks, which are not adequately supported by current transport methods. We propose a new class of protocols capable of stabilizing a transport channel at a specified throughput level in the presence of random network dynamics based on the classical Robbins-Monro stochastic approximation approach. These protocols dynamically adjust the window size or sleep time at the source to achieve stable throughput at the destination. The target throughput typically corresponds to a small fraction of the available connection bandwidth. This approach yields provably probabilistically stable protocols as a consequence of carefully adjusted step sizes. The superior and robust stabilization performance of the proposed approach is extensively evaluated in a simulated environment and further verified through real-life implementations and deployments over both Internet and dedicated connections under disparate network conditions in comparison with existing transport methods.

Original languageEnglish (US)
Pages (from-to)2728-2743
Number of pages16
JournalComputer Networks
Issue number15
StatePublished - Oct 2010
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Computer Networks and Communications


  • Goodput stabilization
  • Stochastic approximation methods
  • Transport control


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