IEEE/ACM Transactions on Networking (TON)
IEEE/ACM Transactions on Networking (TON)
Fundamental limits and tradeoffs of providing deterministic guarantees to VBR video traffic
Proceedings of the 1995 ACM SIGMETRICS joint international conference on Measurement and modeling of computer systems
Source Time Scale and Optimal Buffer/Bandwidth Trade-off for Regulated Traffic in an ATM Node
INFOCOM '97 Proceedings of the INFOCOM '97. Sixteenth Annual Joint Conference of the IEEE Computer and Communications Societies. Driving the Information Revolution
Application of network calculus to guaranteed service networks
IEEE Transactions on Information Theory
Quality of service guarantees in virtual circuit switched networks
IEEE Journal on Selected Areas in Communications
LCN '01 Proceedings of the 26th Annual IEEE Conference on Local Computer Networks
Simplified methods for next generation IP access networks planning
EHAC'06 Proceedings of the 5th WSEAS International Conference on Electronics, Hardware, Wireless and Optical Communications
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It is common belief that ''flat'' Quality of Service (QoS) architectures, e.g. the IETFs Integrated Services architecture (IntServ), are not scalable to large networks, e.g. the global Internet. This is due to the ambitious goal of providing per-flow QoS and the resulting complexity of fine-grained traffic management. One solution to this problem is the aggregation of traffic flows in the core of the network, thus creating a hierarchical resource allocation system. While one might suspect that aggregation leads to allocating more resources for the aggregated flow than for the sum of the separated flows if flow isolation shall be guaranteed deterministically, we show in this article that for IntServ's Guaranteed Service flows this is not necessarily the case even if flow isolation is retained. We compare different approaches to describe the aggregated traffic and analyze their impact on bandwidth consumption and ease of flow management. Furthermore, we perform a thorough numerical evaluation of the derived results with respect to their behavior in response to changes in exogenous parameters like the traffic specifications of the flows or the configuration of the network. Applications of these theoretical insights and numerical evidence could be to use the derived formulae for resource allocation in either a hierarchical IntServ, IntServ over DiffServ (Differentiated Services), or IntServ over ATM (Asynchronous Transfer Mode) network.