Th`ese de Doctorat de l'université Paris VI Pierre et Marie Curie Mlle ...

Chapter 3
Service Model and Dynamic
Provisioning Architecture
A key challenge for the deployment of quality of service networks is the development
of solutions that can dynamically track traffic statistics and allocate network resources
efficiently, satisfying the QoS requirements of users while aiming at maximizing, at the
same time, resource utilization and network revenue.
The contribution of this Chapter is as follows. We introduce a novel service model that
provides quantitative per-flow bandwidth guarantees. Moreover, the network periodically
individuates unused bandwidth and proposes short-term contracts where extra-bandwidth
is allocated and guaranteed exclusively to users who are willing to pay for it to transmit at
a rate higher than their subscribed rate. We implement our proposed service model consid-
ering a distributed provisioning architecture and a set of control messages that assure the
communication between ingress and core routers. Note that a centralized implementation
of our service model can be devised as well; the extension is straightforward and therefore
is not discussed in this thesis.
The structure of this Chapter is the following: in Section 3.1, we introduce our proposed
service model. In Section 3.2, we present a distributed provisioning architecture which
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