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001-es BibID:	BIBFORM010891
Első szerző:	Gyires Tibor
Cím:	Does The Internet Still Demonstrate Fractal Nature? / Tibor Gyires, György Terdik
Dátum:	2009
Megjegyzések:	We briefly describe the problems associated with the network measurement methods designed to provide very high quality packet time-stamps in high-speed networks.
Tárgyszavak:	Természettudományok Matematika- és számítástudományok előadáskivonat
Megjelenés:	International Conference Probability and Statistics with Applications Dedicated to the 100th anniversary of the birthday of Béla Gyires. Abstracts. [elektronikus dokumentum] / Honorary Conference Chairs: Mátyás Arató, Zoltán Daróczy, Kálmán Győry, Attila Pethő. - p. [1]
További szerzők:	Terdik György (1949-) (matematikus, informatikus)
Internet cím:	Szerző által megadott URL Intézményi repozitóriumban (DEA) tárolt változat
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001-es BibID:	BIBFORM012841
Első szerző:	Terdik György (matematikus, informatikus)
Cím:	Does The Internet Still Demonstrate Fractal Nature? / György Terdik, Tibor Gyires
Dátum:	2008
Megjegyzések:	The self-similar nature of bursty Internet traffic has been investigated for the last decade. A first generation of papers, approximately from 1994 to 2004, argued that the traditionally used Poisson models oversimplified the characteristics of network traffic and were not appropriate for modeling bursty, local-area, and widearea network traffic. Since 2004, a second generation of papers has challenged the suitability of these results in networks of the new century and has claimed that the traditional Poisson-based and other models are still more appropriate for characterizing today's Internet traffic. A possible explanation was that as the speed and amount of Internet traffic grow spectacularly, any irregularity of the network traffic, such as self-similarity, might cancel out as a consequence of high-speed optical connections, new communications protocols, and the vast number of multiplexed flows. These papers analyzed traffic traces of Internet backbone collected in 2003. In one of our previous papers we applied the theory of smoothly truncated Levy flights and the linear fractal model in examining the variability of Internet traffic from self-similar to Poisson. We demonstrated that the series of interarrival times was still close to a self-similar process, but the burstiness of the packet lengths decreased significantly compared to earlier traces. Since then, new traffic traces have been made public, including ones captured from the Internet backbone in 2008. In this paper we analyze these traffic traces and apply our new analytical methods to illustrate the tendency of Internet traffic burstiness. Ultimately, we attempt to answer the question: Does the Internet still demonstrate fractal nature?
Tárgyszavak:	Műszaki tudományok Informatikai tudományok előadáskivonat
Megjelenés:	Proceedings of the Workshop on Systems & Control Theory : in honor of József Bokor on his 60th birthday / szerk. Hangos Katalin, Nádai László. - p. 85-100. -
További szerzők:	Gyires Tibor
Internet cím:	Intézményi repozitóriumban (DEA) tárolt változat
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001-es BibID:	BIBFORM012842
Első szerző:	Terdik György (matematikus, informatikus)
Cím:	Fractal Modeling of Internet Traffic / György Terdik, Tibor Gyires
Dátum:	2008
Tárgyszavak:	Műszaki tudományok Informatikai tudományok előadáskivonat
Megjelenés:	The 12th World multi-conference on systemics, cybernetics and informatics, June 29th-July 2nd, 2008, Orlando, FLorida, USA : proceedings : WMSCI 2008 / eds. Nagib Callaos [et. al.]. - 3. vol. p. 156-161
További szerzők:	Gyires Tibor
Internet cím:	Intézményi repozitóriumban (DEA) tárolt változat
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001-es BibID:	BIBFORM006439
035-os BibID:	(WoS)000263604500010 (Scopus)61449179215
Első szerző:	Terdik György (matematikus, informatikus)
Cím:	Lévy Flights and Fractal Modeling of Internet Traffic / György Terdik, Tibor Gyires
Dátum:	2009
ISSN:	1063-6692
Megjegyzések:	The relation between burstiness and self-similarity of network traffic was identified in numerous papers in the past decade. These papers suggested that the widely used Poisson based models were not suitable for modeling bursty, local-area and wide-area network traffic. Poisson models were abandoned as unrealistic and simplistic characterizations of network traffic. Recent papers have challenged the accuracy of these results in today's networks. Authors of these papers believe that it is time to reexamine the Poisson traffic assumption. The explanation is that as the amount of Internet traffic grows dramatically, any irregularity of the network traffic, such as burstiness, might cancel out because of the huge number of different multiplexed flows. Some of these results are based on analyses of particular OC48 Internet backbone connections and other historical traffic traces. We analyzed the same traffic traces and applied new methods to characterize them in terms of packet interarrival times and packet lengths. The major contribution of the paper is the application of two new analytical methods. We apply the theory of smoothly truncated Levy flights and the linear fractal model in examining the variability of Internet traffic from self-similar to Poisson. The paper demonstrates that the series of interarrival times is still close to a self-similar process, but the burstiness of the packet lengths decreases significantly compared to earlier traces.
Tárgyszavak:	Műszaki tudományok Informatikai tudományok idegen nyelvű folyóiratközlemény külföldi lapban folyóiratcikk Burstiness fractal modelling Lévy flights longrange dependence network traffic
Megjelenés:	IEEE/ACM Transactions on Networking. - 17 : 1 (2009), p. 120-129. -
További szerzők:	Gyires Tibor
Internet cím:	DOI Intézményi repozitóriumban (DEA) tárolt változat
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