Adaptive advance reservation based inter-domain framework

There is a growing demand for end-to-end quality of service in present day multi-domain networks. IP/BGP is not equipped to support end-to-end QoS required by new upcoming services, and scalable QoS paradigms are required in lower layers to support future applications. Frequent fluctuations of available inter-domain resources inside a domain hinder the development of a scalable QoS routing paradigm. To address this, we propose a mechanism to create stable inter-domain topologies by employing adaptive advance reservation for inter-domain connections inside a domain. Advance reservation implies that capacity is pre-reserved for inter-domain traffic in the form of layer-2 tunnels, and simple policies are introduced to control the capacity of these tunnels. We study this proposal within the concept of the path computation element (PCE) framework and evaluate the performance of dynamic and adaptively advance-reserved inter-domain connections and topologies.