gTFRC: a QoS-aware congestion control algorithm

  • Authors:

  • Emmanuel Lochin;Laurent Dairaine;Guillaume Jourjon

  • Affiliations:

  • National ICT Australia Ltd;National ICT Australia Ltd and ENSICA - LAAS/CNRS, 1, place Emile Blouin 31056 Toulouse Cedex 5, France;National ICT Australia Ltd and ENSICA - LAAS/CNRS, 1, place Emile Blouin 31056 Toulouse Cedex 5, France

  • Venue:
  • ICNICONSMCL '06 Proceedings of the International Conference on Networking, International Conference on Systems and International Conference on Mobile Communications and Learning Technologies
  • Year:
  • 2006

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Abstract

This study addresses the end-to-end congestion control support over the DiffServ Assured Forwarding (AF) class. The resulting Assured Service (AS) provides a minimum level of throughput guarantee. In this context, this paper describes a new end-to-end mechanism for continuous transfer based on TCP-Friendly Rate Control (TFRC) originally proposed in [11]. The proposed approach modifies TFRC to take into account the QoS negotiated. This mechanism, named gTFRC, is able to reach the minimum throughput guarantee whatever the flow's RTT and target rate. Simulation measurements show the efficiency of this mechanism either in over-provisioned or exactly-provisioned network. In addition, we show that the gTFRC mechanism can be used in the same DiffServ/AF class with TCP or TFRC flows.