Searched for: subject%3A%22PNS%255C%2B%255C-%255C%2BPerformance%255C%2Bof%255C%2BNetworks%255C%2B%2526%255C%2BServices%22
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Leenman, T.S. (author), Phillipson, F. (author)When looking at the optimal place to locate a wind turbine, trade-offs have to be made between local placement and spreading: transmission loss favours local placements and the correlation between the stochastic productions of wind turbines favours spreading. In this paper steps are described to determine the locations of new wind mills that...article 2015
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Kempker, P.L. (author), Ran, A.C.M. (author), van Schuppen, J.H. (author)Coordinated linear systems are a special class of hierarchical linear systems, with a strict top-to-bottom information structure. The LQ problem over all structure-preserving static state feedbacks is discussed. The overall control problem separates into conditionally independent subproblems, a numerical approach to their solution is derived,...bookPart 2015
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Phillipson, F. (author)In this paper heuristics are studied for the design of edge disjoint circuits. We formulate the Edge Disjoint Circuits Problem (EDCP) in the context of a telecommunication network design problem: the roll-out of Fibre to the Cabinet. This problem setting can be represented by a graph. A small subset of the vertices are cabinets and one vertex is...article 2015
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Ellens, W. (author), Mandjes, M. (author), Worm, D.T.H. (author), van den Berg, J.L. (author)For effective capacity management in access networks, it is essential to have a good insight in the service quality perceived by the users. As users share the service capacity available, one would want to know how the achieved per-user throughput fluctuates over time. In this paper we present a novel method that assesses the per-user throughput...conference paper 2014
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Kempker, P.L. (author)This chapter serves as an introduction to the concepts of coordinated linear systems, in formal as well as intuitive terms. The concept of a coordinated linear system is introduced and formulated, and some basic properties are derived, providing both a motivaton and a formal basis for the following chapters of this part.bookPart 2014
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Phillipson, F. (author)Over the past few decades the demand for bandwidth for Internet access has been growing at an unprecedented rate, and this growth is not likely to slow down in the near future. Rolling out Fibre to the Cabinet/Curb networks quickly will be the only way for telecom operators to meet the growing customer demand. This requires a fibre connection to...conference paper 2014
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Litjens, R. (author), Toh, Y. (author), Zhang, H. (author), Blume, O. (author)We assess the energy efficiency of mobile networks in 2020, and compare it with a 2010 baseline. A comprehensive assessment approach is taken, considering all relevant scenario aspects such as data traffic growth, hardware evolutions, mobile network deployments and operations including network sharing and the dynamic switching on/off of radio...conference paper 2014
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Phillipson, F. (author)In this paper a total approach is presented for interactive planning of a reliable Fibre to the Cabinet network. Interactive means here that planning of areas with 600 to 1000 cabinets can be planned roughly within minutes. The problem of telecom operators, when planning Fibre to the Cabinet, is to find the minimum number of cabinets that is...article 2014
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Brown, J.I. (author), Koç, Y. (author), Kooij, R.E. (author)Given a finite, undirected graph G (possibly with multiple edges), we assume that the vertices are operational, but the edges are each independently operational with probability p. The (all-terminal) reliability, Rel(G,p), of G is the probability that the spanning subgraph of operational edges is connected. It has been conjectured that...article 2014
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Pournaras, E. (author), Vasirani, M. (author), Kooij, R.E. (author), Aberer, K. (author)Demand-side energy management improves robustness and efficiency in Smart Grids. Load-adjustment and load-shifting are performed to match demand to available supply. These operations come at a discomfort cost for consumers as their lifestyle is influenced when they adjust or shift in time their demand. Performance of demand-side energy...conference paper 2014
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Trichias, K. (author), Litjens, R. (author), Tall, A. (author), Altman, Z. (author), Ramachandra, P. (author)The advent of Active Antenna Systems has provided new ways and features for increasing the capacity of mobile networks in order to cope with the ever increasing traffic demand. One such feature is the vertical sectorisation (VS) technique where a cell is divided into an inner and an outer sector by using a second downtilted beam from one antenna...conference paper 2014
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Kempker, P.L. (author), Ran, A.C.M. (author), van Schuppen, J.H. (author)Coordinated linear systems are a particular class of hierarchical systems with a top-to-bottom information structure, consisting of a coordinator system and two or more subsystems. This paper deals with the construction and minimality of coordinated linear systems. Construction procedures are given to transform unstructured or interconnected...article 2014
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Altman, Z. (author), Amirijoo, M. (author), Gunnarsson, F. (author), Hoffmann, H. (author), Kovács, I.Z. (author), Laselva, D. (author), Sas, B. (author), Spaey, K. (author), Tall, A. (author), van den Berg, H. (author), Zetterberg, K. (author)With an increasing number of SON functions deployed in cellular radio networks, conflicts between the actions proposed by independently-designed and distributed SON functions may arise. The process of minimizing the occurrence, and the consequences, of such conflicts is referred to as SON coordination. SON coordination can be achieved either by...conference paper 2014
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Koç, Y. (author), Warnier, M. (author), van Mieghem, P. (author), Kooij, R.E. (author), Brazier, F.M.T. (author)Cascading failures are one of the main reasons for blackouts in electric power transmission grids. The economic cost of such failures is in the order of tens of billion dollars annually. The loading level of power system is a key aspect to determine the amount of the damage caused by cascading failures. Existing studies show that the blackout...article 2014
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Litjens, R. (author), Hendriks, R.W. (author)Mobile network operators are currently preparing the introduction of QoS differentiation mechanisms in their 3G networks, as a means to support service-specific quality requirements, to enable the offering of distinct subscription forms and/or to enhance the resource efficiency and hence network capacity. In this paper we quantify the attainable...article 2014
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Koç, Y. (author), Warnier, M. (author), Kooij, R.E. (author), Brazier, F. (author)Cascading failures are the typical reasons of blackouts in power grids. The grid topology plays an important role in determining the dynamics of cascading failures in power grids. Measures for vulnerability analysis are crucial to assure a higher level of robustness of power grids. Metrics from Complex Networks are widely used to investigate the...conference paper 2014
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Janssen, T. (author), Litjens, R. (author), Sowerby, K.W. (author)Driven by a combination of flat lining revenues and an explosive growth in the mobile data traffic and hence the need for network resources, mobile operators consider infrastructure-and spectrum sharing as a means to reduce operational costs. We develop and apply an assessment approach to quantify the benefits associated with spectrum sharing in...conference paper 2014
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Phillipson, F. (author), Matthijssen, E.F. (author), Attema, T. (author)Business continuity professionals try to deal with multiple aspects which influence the continuity of a company. The key product is a coherent system of measures which encompass detection, prevention and recovery. Choices made in one element of the system affect other elements as well as the continuity risks of the company. In complex...article 2014
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Szewczuk, S. (author), von Gavel, S. (author), Verhagen, W.P. (author), Schreuder, M.H. (author), Marnphweli, S. (author), McMaster, A. (author)There is a genuine opportunity for the developing world and rural areas to leapfrog the conventional Western paradigm of power. Where conventional electricity delivery is reliant on expensive, polluting and centrally controlled generation (with its spider web of infrastructure and dependence on decades-old technologies), the developing world can...conference paper 2014
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Schmidt, R.D.O. (author), Sadre, R. (author), Sperotto, A. (author), van den Berg, H. (author), Pras, A. (author)An important task for network operators is to properly dimension the capacity of their links. Often, this is done by simple rules of thumb based on coarse traffic measurements provided, e.g., by SNMP. More accurate estimations of the required link capacity typically require packet-level measurements, which are hard to implement in today's high...article 2014
Searched for: subject%3A%22PNS%255C%2B%255C-%255C%2BPerformance%255C%2Bof%255C%2BNetworks%255C%2B%2526%255C%2BServices%22
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