A Better-Than-Best-Effort Service for Continuous Media UDP Flows

A talk given by Mark Parris at the Eighth International Workshop on Network and Operating System Support for Digital Audio and Video, Cambridge, UK, July 1998

Abstract: The Internet community is very interested in addressing congestion with active queue management mechanisms like Random Early Detection (RED). Recent proposals extend these mechanisms to actively penalize "misbehav-ing" flows. These methods favor TCP and TCP-like flows strongly over other flows like UDP. In this paper we pro-pose extensions to active queue management disciplines which continue to address congestion and reward TCP-friendly flows while minimizing impact on continuous media flows using other protocols. Our mechanism, Drop Preference Management (DPM), recognizes tagged flows and manages their latency while constraining the band-width they consume. We present empirical results of ex-periments comparing our mechanism to plain RED.

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