Searched for: subject%3A%22PNS%255C%2B%255C-%255C%2BPerformance%255C%2Bof%255C%2BNetworks%255C%2B%2526%255C%2BServices%22
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Mandjes, M. (author), Zuraniewski, P.W. (author)
This paper considers the so-called M/G/∞ model: jobs arrive according to a Poisson process with rate λ, and each of them stays in the system during a random amount of time, distributed as a non-negative random variable B; throughout it is assumed that B is light-tailed. With N(t) denoting the number of jobs in the system, the random process A(t)...
article 2011
document
Whiting, P.A. (author), Kramer, G. (author), Nuzman, C.J. (author), Ashikhmin, A. (author), van Wijngaarden, A.J. (author), Živković, M. (author)
Digital subscriber line (DSL) data rates for short loops are typically limited by crosstalk between adjacent lines rather than by background noise. Precoding can reduce crosstalk in the downstream from the access node to the customer premises equipment significantly if an accurate estimate of the inverse crosstalk channel is provided. Recently,...
article 2011
document
Sas, B. (author), Spaey, K. (author), Balan, I. (author), Zetterberg, K. (author), Litjens, R. (author)
In mobile cellular networks the handover (HO) algorithm is responsible for determining when calls of users that are moving from one cell to another are handed over from the former to the latter. The admission control (AC) algorithm, which is the algorithm that decides whether new (fresh or HO) calls that enter a cell are allowed to the cell or...
conference paper 2011
document
Youssef, M. (author), Kooij, R.E. (author), Scoglio, C. (author)
In this paper, we propose a novel measure, viral conductance (VC), to assess the robustness of complex networks with respect to the spread of SIS epidemics. In contrast to classical measures that assess the robustness of networks based on the epidemic threshold above which an epidemic takes place, the new measure incorporates the fraction of...
article 2011
document
Amirijoo, M. (author), Jorguseski, L. (author), Litjens, R. (author), Schmelz, L.C. (author)
Cell outage compensation is a self-healing function and as such part of the Self-Organising Networks concept for mobile wireless networks. It aims at mitigating the degradation of coverage, capacity and service quality caused by a cell or site level outage. Upon detection of such an outage, cell outage compensation tunes a variety of control...
conference paper 2011
document
Ellens, W. (author), Spieksma, F.M. (author), van Mieghem, P. (author), Jamakovic, A. (author), Kooij, R.E. (author)
This paper studies an interesting graph measure that we call the effective graph resistance. The notion of effective graph resistance is derived from the field of electric circuit analysis where it is defined as the accumulated effective resistance between all pairs of vertices. The objective of the paper is twofold. First, we survey known...
article 2011
document
Dimitrova, D.C. (author), Heijenk, G. (author), van den Berg, J.L. (author), Yankov, S. (author)
The Long Term Evolution (LTE) cellular technology is expected to extend the capacity and improve the performance of current 3G cellular networks. Among the key mechanisms in LTE responsible for traffic management is the packet scheduler, which handles the allocation of resources to active flows in both the frequency and time dimension. This...
bookPart 2011
document
Dhondt, S. (author), de Leede, J. (author), Oeij, P.R.A. (author), Phillipson, F. (author), Vergeer, R. (author), Ellens, W. (author), van Emmerik, M.L. (author), Roijers, F. (author), Smit-Rietveld, C.J.C. (author), Goudswaard, A. (author)
report 2011
document
Ramiro, J. (author), Moya, R. (author), del Río, J.C. (author), Amirijoo, M. (author), Litjens, R. (author), Hamied, K. (author), Faour, N. (author), Úbeda, C. (author), Hylander, G. (author), Muñoz, J. (author)
bookPart 2011
document
Cruz, R. (author), Hamied, K. (author), Moreno, J.R. (author), Schmelz, L.C. (author), Amirijoo, M. (author), Eisenblätter, A. (author), Litjens, R. (author), Neuland, M. (author), Turk, J. (author)
The development of SON functions such as Handover optimisation, Admission Control optimisation and Load Balancing has concentrated on the issues of algorithms to adjust parameters dynamically according to performance targets and performance measurements. These functions are created in a largely stand-alone manner, but in a practical...
bookPart 2011
document
Chhatta, R.M. (author)
The robustness of complex networks, like metro networks, is a really important issue to our daily life. With robustness we indicate the extent to which a network can deal with challenges imposed on the network, such as failures or attacks of nodes and/or links of the network. In this case the stations of the metro networks are the nodes of the...
report 2011
document
Litjens, R. (author), Zhang, H. (author)
We present an analytical approach to assess the performance gains from spectrum sharing in a wireless communications network with two co-sited cells, with specific focus on the performance impact of the timescale at which spectrum is shared. Primary focus is on the analysis of spectrum sharing mechanisms that operate on a timescale of minutes or...
conference paper 2011
document
van Kester, S. (author), Xiao, T. (author), Kooij, R.E. (author), Brunnström, K. (author), Ahmed, O.K. (author)
This paper studies the impact of freezing of video on quality as experienced by users. Two types of freezes are investigated. First a freeze where the image pauses, so no frames were lost (frame halt). In the second type of freeze, the image freezes and skips that part of the video (frame drop). Measuring Mean Opinion Score (MOS) was done by...
conference paper 2011
document
Boertjes, E.M. (author), Jamakovic, A, (author)
Het gebruik van sociale media overtreft al enkele jaren in ruime mate het gebruik van klassieke media als e-mail (Nielsen, 2009). Voor velen is een bestaan zonder Facebook, Flickr, Hyves, MySpace, FourSquare, LinkedIn en Twitter dan ook niet meer denkbaar. Door de sporen die elke gebruiker van sociale media achterlaat in de vorm van berichtjes,...
article 2011
document
Nooren, P.A. (author), Wiarda, S. (author)
Netneutraliteit is al jaren een onderwerp van discussie in de Internet en telecom wereld. In de kern gaat de netneutraliteitsdiscussie over de mate waarin verschillende soorten verkeer op het Internet verschillend mogen worden behandeld. Verschillend behandelen kan daarbij diverse vormen aannemen. Zo kunnen verkeerstromen technisch verschillend...
report 2011
document
Degen, A.J.G. (author), Huveneers, S.G. (author), Kooij, R.E. (author)
Doelstelling: Om meer inzicht te krijgen in de risico’s bij het gebruik van ICT-diensten en de relatie met het vertrouwen van consumenten en bedrijven, is besloten te werken aan een monitor ‘Vertrouwen in ICT’. Dit onderzoek heeft als doel de eerste noodzakelijke stap te zetten: het bouwen van een monitoringfundament om over langere periode het...
report 2011
document
Koc, Y. (author), Jamakovic, A. (author), Gijsen, B.M.M. (author)
The Domain Name System (DNS) is a crucial component of today’s Internet. At this point in time the DNS is facing major changes such as the introduction of DNSSEC and Internationalized Domain Name extensions (IDNs), the adoption of IPv6 and the upcoming extension of new generic Top-Level Domains. These changes can have impact on the behaviour of...
conference paper 2011
document
Litjens, R. (author), Jorguseski, L. (author), TNO Informatie- en Communicatietechnologie (author)
Mobile communication networks are usually planned to provide some minimum service quality level during peak traffic hours. Consequently, in off-peak hours, when traffic loads are lower, the network is characterised by over-capacity, in the sense that same service quality targets can typically be satisfied with a reduced set of network resources,...
conference paper 2010
document
Beerends, J.G. (author), TNO Informatie- en Communicatietechnologie (author)
public lecture 2010
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TNO Informatie- en Communicatietechnologie (author), Dimitrova, D.C. (author), van den Berg, J.L. (author), Litjens, R. (author), Heijenk, G. (author)
Long Term Evolution (LTE) is a cellular technology developed to support diversity of data traffic at potentially high rates. It is foreseen to extend the capacity and improve the performance of current 3G cellular networks. A key mechanism in the LTE traffic handling is the packet scheduler, which is in charge of allocating resources to active...
conference paper 2010
Searched for: subject%3A%22PNS%255C%2B%255C-%255C%2BPerformance%255C%2Bof%255C%2BNetworks%255C%2B%2526%255C%2BServices%22
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