821 research outputs found
Numerical Methods of Multifractal Analysis in Information Communication Systems and Networks
In this chapter, the main principles of the theory of fractals and multifractals are stated. A singularity
spectrum is introduced for the random telecommunication traffic, concepts of fractal dimensions and
scaling functions, and methods used in their determination by means of Wavelet Transform Modulus
Maxima (WTMM) are proposed. Algorithm development methods for estimating multifractal spectrum
are presented. A method based on multifractal data analysis at network layer level by means of WTMM
is proposed for the detection of traffic anomalies in computer and telecommunication networks. The
chapter also introduces WTMM as the informative indicator to exploit the distinction of fractal dimen-
sions on various parts of a given dataset. A novel approach based on the use of multifractal spectrum
parameters is proposed for estimating queuing performance for the generalized multifractal traffic on
the input of a buffering device. It is shown that the multifractal character of traffic has significant impact
on queuing performance characteristics
The Methods to Improve Quality of Service by Accounting Secure Parameters
A solution to the problem of ensuring quality of service, providing a greater
number of services with higher efficiency taking into account network security
is proposed. In this paper, experiments were conducted to analyze the effect of
self-similarity and attacks on the quality of service parameters. Method of
buffering and control of channel capacity and calculating of routing cost
method in the network, which take into account the parameters of traffic
multifractality and the probability of detecting attacks in telecommunications
networks were proposed. The both proposed methods accounting the given
restrictions on the delay time and the number of lost packets for every type
quality of service traffic. During simulation the parameters of transmitted
traffic (self-similarity, intensity) and the parameters of network (current
channel load, node buffer size) were changed and the maximum allowable load of
network was determined. The results of analysis show that occurrence of
overload when transmitting traffic over a switched channel associated with
multifractal traffic characteristics and presence of attack. It was shown that
proposed methods can reduce the lost data and improve the efficiency of network
resources.Comment: 10 pages, 1 figure, 1 equation, 1 table. arXiv admin note: text
overlap with arXiv:1904.0520
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