Lots of research works have been performed around the QoS problem in the Internet, both but separately at the Transport and at the IP levels.

Taking into account the emerging traffic engineering-based QoS solutions, the paper addresses the integration of new Transport services/protocols together with these solutions. Starting from performance measurements performed over a national platform implementing differentiated IP services within a single domain, contributions exposed in this paper deal with the proposition and the implementation of a session level protocol allowing the application programmers to be masked with the complexity of choosing the underlying new Transport and IP services, still being provided with a per flow QoS.

The paper first exposes a formalization of the link between the application needs and the networking environment by defining how to map the application requirements (for each of its flows, e.g. audio and video) together with deterministic or non deterministic underlying QoS services (typically EF or AF-based ones at the IP level). The paper then studies how to quantify the end-to-end QoS resulting from the coupling between new Transport QoS and EF or AF-based IP QoS in a mono domain DiffServ environment. The algorithm allowing to select the adequate Transport and IP services matching an Application level QoS request is then detailed. Experimental tests allowing to observe the behavior of the end-to-end communication system for a videoconference application are also exposed and analyzed. Conclusions and future work addressing the multi domain context are finally exposed.