Building a controlled delay assured forwarding class in differentiated services networks

Authors:
P. Kulkarni;M. Nazeeruddin;S. McClean
Affiliations:
University of Ulster, Coleraine, Northern Ireland;University of Ulster, Coleraine, Northern Ireland;University of Ulster, Coleraine, Northern Ireland
Venue:
Proceedings of the 2006 SIGCOMM workshop on Internet network management
Year:
2006

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Abstract

Several Active Queue Management (AQM) based solutions have been proposed to enable service differentiation in the DiffServ Assured Forwarding (AF) class(es). Most of these solutions, however, provide throughput guarantees only. This paper proposes a new queue management approach called PAQMAN-DS which provides quantitative controlled delay guarantees to delay sensitive applications in the AF class. The proposed approach is based on predicting the future state of the queue and requires specification of only a single parameter (target delay) per hop. Performance evaluation of PAQMAN-DS through ns-2 simulations reveals that it regulates the delay around the target mark on a per-hop basis, discriminates in favour of IN contract traffic and simultaneously achieves high link utilization.