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

7.1 Performance Metrics
We consider the following performance metrics: the average accepted load and network
extra-revenue.
The average accepted load is obtained averaging the total load accepted in the network
over all the bandwidth update intervals, while the average network extra-revenue has been
defined in Section 4.3. We recall, hereafter, the definition of network extra-revenue:
where srk and b n k
Uk(b n k) − Uk(srk)
k∈Kg
represent, respectively, the subscribed rate and the average transmission
rate in the n − th update interval for all greedy connections k ∈ Kg, andUk(x) modelsthe
perceived utility of the k − th user for an allocation of x bandwidth units.
7.2 Network Scenarios
We refer to four network scenarios ranging from a single-bottleneck topology to a complex
core network topology to evaluate the performance of our proposed bandwidth allocation
algorithms. All numerical results have been calculated over long-lived data exchanges,
achieving very narrow 95% confidence intervals [36].
7.2.1 Single-Bottleneck Scenario
In this scenario we gauge the effectiveness of the proposed traffic-based bandwidth allo-
cation algorithms. We consider, in line with [1, 2], the scenario illustrated in Figure 7.1,
that consists of a single-bottleneck with 2 core nodes, 6 access nodes, 40 end nodes (20
source-destination pairs) and traffic conditioners at the edge. Each ingress conditioner is
configured with one profile for each traffic source, and drops out-of-profile packets. All links
are full-duplex and have a propagation delay of 1 ms. The capacity of the link connecting
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