Simulation analysis of RED with short lived TCP connections

  • Authors:
  • Eitan Altman;Tania Jiménez

  • Affiliations:
  • INRIA, BP93, 2004 Route des Lucioles, 06902 Sophia Antipolis Cedex, France;CESIMO, Facultad de Ingeniera, Univ. de Los Andes, 5101 Mérida, Venezuela

  • Venue:
  • Computer Networks: The International Journal of Computer and Telecommunications Networking
  • Year:
  • 2004

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Abstract

Several objectives have been identified in developing the random early drop (RED): decreasing queueing delay, increasing throughput, and increasing fairness between short and long lived connections. It has been believed that indeed the drop probability of a packet in RED does not depend on the size of the file to which it belongs. In this paper we study the fairness properties of RED where fairness is taken with respect to the size of the transferred file. We focus on short lived TCP sessions. Our findings are that (i) in terms of loss probabilities, RED is unfair: it favors short sessions, (ii) RED is fairer in terms of the average throughput of a session (as a function of its size) than in terms of loss probabilities. We study various loading regimes, with various versions of RED.