  Fixed Communication Provider (FCP) is a consortium of Internet Service
Providers (ISPs) which users can switch easily and freely between their ISPs.
In order to increase the QoS of the ISPs, we propose a two class service model
as the following. ISPs divide their available bandwidth into two parts to
provide their end users with optimal services. One dedicated to primary users,
and the other for secondary users. Primary users are those who pay more and
thus, expect dedicated bandwidth that is always available. Secondary services
are provided by ISPs for the other users who cannot afford the dedicated
bandwidth. In this study, by defining the utility functions for both user
types, we aim at dividing the ISP bandwidth between these two services such
that the utility function of the users is maximized. Since the primary users do
not always use the maximum bandwidth, an algorithm is proposed for ISPs to
estimate the primary users required bandwidth in each time segment based on the
previous segments. Based on this estimate, the expected bandwidth is dedicated
to the primary users, and the remaining bandwidth is devoted to the secondary
users to improve the Quality of Service (QoS). On the other hand, an ISP is
penalized if it fails to provide the primary users with the required bandwidth
mentioned in their contract. Therefore, there exists a trade-off between the
conservative estimation of the primary users rate, QoS of the secondary users
and the achieved utility of the ISPs.
