Implementation and performance analysis of a QoS-aware TFRC mechanism

Guillaume Jourjon (1) , Emmanuel Lochin (1) , Laurent Dairaine (2, 3) , Patrick Sénac (4, 2, 3) , Tim Moors , Aruna Seneviratne (5)

1 NICTA - National ICT Australia [Sydney]
2 DMIA - Département de Mathématiques, Informatique, Automatique
3 ISAE-SUPAERO - Institut Supérieur de l'Aéronautique et de l'Espace
4 LAAS - Laboratoire d'analyse et d'architecture des systèmes
5 NICTA - Networks Research Group

This paper deals with the improvement of transport protocol behaviour over the DiffServ Assured Forwarding (AF) class. The Assured Service (AS) provides a minimum throughput guarantee that classical congestion control mechanisms, like window-based in TCP or equation-based in TCP-Friendly Rate Control (TFRC), are not able to use efficiently. In response, this paper proposes a performance analysis of a QoS aware congestion control mechanism, named gTFRC, which improves the delivery of continuous streams. The gTFRC (guaranteed TFRC) mechanism has been integrated into an Enhanced Transport Protocol (ETP) that allows protocol mechanisms to be dynamically managed and controlled. After comparing a ns-2 simulation and our implementation of the basic TFRC mechanism, we show that ETP/gTFRC extension is able to reach a minimum throughput guarantee whatever the flow's RTT and target rate (TR) and the network provisioning conditions1.

Mots clés: TFRC; Transport; Congestion Control; DiffServ; Assured Service

Domaines: Réseaux et télécommunications [cs.NI]

Guillaume Jourjon, Emmanuel Lochin, Laurent Dairaine, Patrick Sénac, Tim Moors, et al.. Implementation and performance analysis of a QoS-aware TFRC mechanism. 14th IEEE International Conference on Networks, Sep 2006, Singapore, Singapore. pp.1-6, ⟨10.1109/ICON.2006.302658⟩. ⟨hal-02549667⟩