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This paper addresses the problem of dimensioning IP access networks for elastic traffic, which is carried by the TCP protocol. The M/G/R Processor Sharing model (M/G/R PS) is used as the basis for capacity computations. The model is extended to take into account TCP specific properties, thus, giving more accurate values, especially for increasing round-trip(More)
– In this paper we study routing optimization in the context of IP traffic engineering, which relies on conventional, destination-based routing protocols. We introduce the different concepts of routing optimization and discuss their implications for traffic engineering. The specific focus is on routing technologies that utilize multiple metric types – in(More)
This paper discusses different approaches of providing multicast traffic for mobile hosts. Mobile IPv6 is used for mobility support. The network employs Protocol Independent Multicast Dense Mode (PIM–DM) for multicast routing and Multicast Listener Discovery (MLD) to collect multicast group membership information. We identify and analyze interoperation(More)
In this paper, a new genetic algorithm is introduced which is used as a versatile tool for solving different types of optimization problems arising in the field of network planning. The genetic algorithm is applied to the minimum Steiner tree problem which plays an important role in the design of tree-structured passive optical networks in the access area.(More)
In this paper, the application of individual scenario-based traffic models in identifying the traffic carrying needs of networks in patient monitoring environments is presented. Since the total number of traffic sources is small for a central limit theorem-like approximation, a simple traffic matrix for each scenario can be used to identify the capacity(More)
Routing optimization provides network operators with a powerful method for traffic engineering. Its general objective is to distribute traffic flows evenly across available network resources in order to avoid network congestion and quality of service degradation. In this paper we consider routing optimization based on conventional routing protocols where(More)
Contrary to some announcements, bandwidth will remain a scarce resource in certain sectors such as Internet access via mobile networks. Thus, models for exact dimensioning and optimization of Internet access networks become vital for economy and quality of service. The Internet will soon integrate real-time (stream) and non-real-time (elastic) traffic(More)
1 3 4 5 2 SRP Node Node Submodel Fig. 1. The model of an RPR ring with five nodes. Abstract— Based on queuing theory we develop analytical approximations for the average packet transfer time of a store-and-forward and a cut-through buffer insertion ring with two client traffic priorities. These types of rings are architectural alternatives for resilient(More)