JOURNAL OF COMMUNICATIONS (JCM)
ISSN : 1796-2021
Volume : 1    Issue : 3    Date : June 2006

A Premium Traffic Management in DiffServ Through End-to-End Delay Budget Partitioning
Hamada Alshaer and Eric Horlait
Page(s): 29-40
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Abstract
Our novel Call Admission Control (CAC) scheme [1], [2] determines the number of Expedited
Forwarding (EF) (Premium) flows accepted, based on e2e available bandwidth measurement.
However, it does not control the number of flows that could be accepted at a node or over a link
along a selected routing path for an EF flow. Hence we complemented the functionality of CAC with
original traffic management algorithms [2], [3] to balance EF traffic along the selected routing path
for new EF flows and consequently across Differentiated Services (DiffServ) network. The novelty of
these algorithms emerges from the fact that they employ an optimization dimension of EF traffic,
namely the partitioning of End-to-End (e2e) delay required for a new flow into per-link or per-DiffServ
node along the selected routing path. Furthermore, some network resource policies are
incorporated with these algorithms to apportion the e2e resource required for EF traffic flows into
per-DiffServ node requirement along the selected routing path. We demonstrate through analysis
and simulation that our proposed optimal e2e delay budget management algorithms are superior
to Equi-Partitioning (EP) algorithm for DiffServ in guaranteeing e2e delay bounds required for
EF flows. Furthermore, highly loaded DiffServ nodes are assigned low delay budget and the
opposite for low loaded DiffServ nodes, which result in increasing DiffServ network resource
utilization.

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