Supplying legacy applications with QoS : a description syntax at application , end - user and network level ∗

In this article we consider end-to-end interdomain Quality of Service support for non QoS-aware applications. We present a description of QoS requests resp. offers at two levels: 1at network level: the so called network service profile, and 2at application resp. end-user level: the so called application profile. These profiles support end-to-end and interdomain interworking for legacy applications wether they are QoS-aware or not. The network is QoS enabled and offers guaranteed network services. With the proposed mechanisms (combination of converters and description syntax at network and application level) it is possible on the one hand to offer user-friendly QoS, and on the other hand to provide a negotiation and description syntax for QoS. Thereby we address the topic of reverse-engineering Internet applications in order to extract the behavior and parameterizations information necessary for the creation of the application profiles.