Metrics, Guidelines, and Evaluation Scenarios for RMCAT

23d1ad8982616babb4d5b60470eea8a4?s=47 Varun Singh
November 06, 2013

Metrics, Guidelines, and Evaluation Scenarios for RMCAT

IETF88, Vancouver

23d1ad8982616babb4d5b60470eea8a4?s=128

Varun Singh

November 06, 2013
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  1. Evaluating Congestion Control for Interactive Real-time Media http://tools.ietf.org/html/draft-singh-rmcat-cc-eval-04 IETF88, Vancouver

    06 November, 2013 Varun Singh, Joerg Ott
  2. Changes since -03 version •  Clarified Metrics: – Convergence time – Bandwidth

    utilization •  Fairness Criteria changed to Fairness Test •  only DropTail for now. 2
  3. Open Issues •  Short TCP flows Proposal: – modeled as a

    sequence of file downloads interleaved with idle periods – File sizes: uniform distribution between 100KB to 1.5MB. – Idle period: exponential distribution with the mean value of 10 seconds. 3
  4. Evaluation Methodology •  No Traffic Generator –  Application generates rates

    estimated by the congestion controller. •  Media Traffic Generator –  Application generates rates as close to the estimated rate. –  Discussed traffic model (3rd Nov), may appear as a separate draft. •  Real sequences –  Applications generates rates based on type of video sequence (codec) and estimated rate by the congestion controller. 4
  5. Next Steps •  Scenarios and expected behaviour are catalogued at

    –  https://sites.google.com/site/ietfrmcatsolutionevaluations/ – Currently, contains scenarios that already have experimentation results. •  Adopt as WG item? 5