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A Premium Traffic Management in DiffServ Through End-to-End delay Budget Partitioning

Hamada Alshaer1, Eric Horlait2
1. Department of Electronic and Computer Engineering, Brunel University,London,UK
2. QoSMoS Company,75019 Paris,France

Abstract—Our novel Call Admission Control (CAC)scheme [1], [2] determines the number of Expedited Forwarding(EF) (Premium) flows accepted, based on e2eavailable bandwidth measurement. However, it does notcontrol the number of flows that could be accepted at anode or over a link along a selected routing path for an EFflow. Hence we complemented the functionality of CAC withoriginal traffic management algorithms [2], [3] to balanceEF traffic along the selected routing path for new EF flowsand consequently across Differentiated Services (DiffServ)network. The novelty of these algorithms emerges from thefact that they employ an optimization dimension of EFtraffic, namely the partitioning of End-to-End (e2e) delayrequired for a new flow into per-link or per-DiffServ nodealong the selected routing path. Furthermore, some networkresource policies are incorporated with these algorithms toapportion the e2e resource required for EF traffic flows intoper-DiffServ node requirement along the selected routingpath. We demonstrate through analysis and simulation thatour proposed optimal e2e delay budget management algorithmsare superior to Equi-Partitioning (EP) algorithmfor DiffServ in guaranteeing e2e delay bounds required forEF flows. Furthermore, highly loaded DiffServ nodes areassigned low delay budget and the opposite for low loadedDiffServ nodes, which result in increasing DiffServ networkresource utilization.

Index Terms—DiffServ, E2E delay budget partitioning,Resource partitioning policies,EF load balancing

Cite: Hamada Alshaer and Eric Horlait, "A Premium Traffic Management in DiffServ Through End-to-End delay Budget Partitioning," Journal of Communications, vol. 1, no. 3, pp. 29-40, 2006.