Global availability of on-demand services with some level of guaranteed quality-of-service (QoS) is still missing in the Internet today. The Differentiated Services Architecture achieves scalability in the data pat Ii by subsuming all flows with a specific type of service into an aggregate. But in order to provide guaranteed end-to-end reservations, the management of resource reservations by control entities (e.g. performing admission control) has to be scalable as well. The DARIS Architecture provides this essential linkage between scalability in packet forwarding path and scalability of QoS management in the Internet. It comprises a novel concept of dynamic and hierarchical aggregation, which acts on the network level of autonomous Systems (AS). This relieves management entities in intermediate ASs of processing load by reducing their managed reservation states as well as the number of signaling messages that have to be processed to a minimum. Moreover, novel and special support for aggregation by a dedicated signaling protocol is provided.
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