Results of simulation modeling of technical parameters of a multiservice network

TELKOMNIKA Telecommunication Computing Electronics and Control
Vol. 21, No. 3, June 2023, pp. 702~710
ISSN: 1693-6930, DOI: 10.12928/TELKOMNIKA.v21i3.24058  702
Journal homepage: http://telkomnika.uad.ac.id
Results of simulation modeling of technical parameters of a
multiservice network
Alevtina Aleksandrovna Muradova, Dilbar Turgunovna Normatova
Department of Telecommunication Engineering, Tashkent University of Information Technologies named after Muhammad Al-Khwarizmi,
Tashkent, Uzbekistan
Article Info ABSTRACT
Article history:
Received May 26, 2022
Revised Oct 26, 2022
Accepted Nov 12, 2022
In a scientific article, the authors presented the results of simulation
modeling of the technical parameters of a multiservice network. As a model
of a multiservice communication network for the computational experiment,
the model proposed in the previous scientific publications of the author was
chosen. The selected model uses the Laplase-Stilles transform. Simulation
modeling was carried out using the technical parameters of the multiservice
network’s availability factor and network load. Scientific results of
experimental research work are given in the form of tables. Relations of the
probability of betime servicing of an application on the load of a
multiservice communication network for various availability factors and the
probability of untimely service of an application on the availability factor for
numerous network loadings are obtained. The character of the distribution of
costs necessary for the implementation of solutions for different categories
of technical operation is shown. Scientific research on determining the
objective function’s minimum value is presented in graphs and diagrams.
The results of simulation modeling of the technical parameters of
multiservice networks are presented in the form of diagrams using the
Matlab software environment.
Keywords:
Computational experiment
Dependence of the probability
Laplace-Stielles transform
Multiservice communication
network
Queuing model
Technical parameters
This is an open access article under the CC BY-SA license.
Corresponding Author:
Alevtina Aleksandrovna Muradova
Department of Telecommunication Engineering
Tashkent University of Information Technologies named after Muhammad Al-Khwarizmi
108 Amir Temur Prospect, Tashkent City, 100200, The Republic of Uzbekistan
Email: a.muradova1982@inbox.ru
1. INTRODUCTION
The author’s scientific articles present the developed model of a multiservice communication
network. This developed model allows you to analyze the technical parameters of a multiservice
communication network from the point of view of a systematic approach. In this model, network components
are presented as several separate subsystems, which are independent levels. Levels perform certain functions
in batch mode with a given quality of service. The authors substantiate the expediency of determining the
technical parameters of an info-communication network based on a systematic approach, taking into account
the reliability of each network level. The scientific novelty of this work lies in the fact that using the previous
works of the author, it is proposed to solve the problem of studying the technical parameters of multiservice
communication networks using system analysis and using the Matlab software environment [1]-[3].
In Muradova [4], a model is proposed that allows, from a systemic point of view, to investigate the
reliability indicators of an info-communication network (ICN) with a distributed structure, the essence of
which is to represent the components of the ICN as subsystems that are independent levels and perform
specific functions in batch mode with a given quality of service. The paper substantiates the expediency of

TELKOMNIKA Telecommun Comput El Control 
Results of simulation modeling of technical parameters of … (Alevtina Aleksandrovna Muradova)
703
determining the reliability indicators of ICN based on a systematic approach, taking into account the
reliability states of each network level. In this paper, it is proposed to rationally distribute the resource
allocated to ensure the reliability of the studied ICS between the network levels. In other words, it is
proposed to minimize the resource allocated to ensure the required reliability of the ICN, taking into account
the company’s cost losses arising from the residual unreliability of the network components. When executing
user requests, as a rule, all elements of the ICN take part, and the unreliable functioning of at least one
element can negate all the work performed by other network components. The appearance of failures and
failures in network channels and gateways, in routing and switching centers, in information processing and
storage systems, as well as in network resource management systems lead to a disruption in the normal
operation of both operators and all users (clients), which leads to large losses of companies providing various
types of services [5], [6].
Five characteristic features can be identified for ICN networks. The first feature is the use of packet
technologies in the transport network to transfer all kinds of information. The second feature is the use of
distributed architecture switching systems that differ from traditional (functionally oriented) telephone
exchanges. The third feature is the separation of service support functions from switching and transmission.
The fourth feature is the provision of broadband access for any user. The fifth feature is the implementation
of operational management functions (including those delegated to users) using web technologies.
The functional model of ICN networks is represented by 4 levels: 1) access level, 2) transport layer,
3) network management layer, and 4) service management level. At the level of border access, subscribers
and terminals are connected to the network based on the use of various means and the format of outgoing
information is converted into the appropriate format used for transmission in this network. The transport
layer handles packet switching and transport, and uses devices such as routers and layer 3 internet protocol
(IP) switch distributed in the backbone network and transport network (MAN) [7], [8]. This layer provides
subscribers with a uniform and integral transmission platform with high reliability, high quality of service
(QoS), and large bandwidth. The network management layer controls calls. The underlying technology at this
layer is flexible switching, which is used for real-time call control and call setup control. Softswitch is the main
device that implements the functions of the switching and information transfer control level. At the service
control level, the provision of additional services is mainly carried out, as well as support for the operation of
established connections. The next generation network, being a complex technical system, can in a particular
case be an information network that provides various types of services to users. This system includes both
communication facilities and an information processing and management system that performs the functions of
the required network maintenance and decision making for quality user service [9].
Network fault management: you can have a designated network fault management team to
anticipate, detect, and resolve network faults to minimize downtime. In addition to fault resolution, this
function is responsible for logging fault information, maintaining records, conducting analysis, and aiding in
regular audits. There need to be clear channels so that the network fault management team can report back to
the network administrator to maintain transparency. It will also work closely with the end-user in case they
report faults. Network configuration management: network configurations are a key aspect of performance.
These configurations are expected to change dynamically to keep up with data and traffic demands in a large
enterprise. Network configuration management relies heavily on automation so that the team does not need to
manually look up configuration requirements and can provision changes automatically instead. Like network
fault management, the network configuration management team must also keep detailed records of all changes,
their outcomes, and issues, if any. Network accounting and utilization management: as network requirements
evolve, employees will consume more network resources and add to enterprise costs. The network accounting
management team monitors utilization finds anomalies and tracks utilization trends for different departments,
business functions, office locations, online products, or even individual users. Network performance
management: this is one of the most central aspects of network management. Network performance
management involves various tasks that help boost network uptime, service availability, and concurrent
bandwidth speeds. Here too, automation plays a major role. A singular dashboard is connected to various
network components that monitor performance key performance indicators (KPI) and raises an alert if a
threshold is breached. Network security management: as most enterprise processes move online, network
security is vital for resilience, risk management, and success. In a distributed denial-of-service attack (DDoS),
multiple connected online devices target an enterprise website with fake traffic to block legitimate traffic.
Network security management involves protecting a system against these and other issues. An enterprise
network also generates a regular stream of logs analyzed by the network security management team to find any
threat fingerprints [10].

 ISSN: 1693-6930
TELKOMNIKA Telecommun Comput El Control, Vol. 21, No. 3, June 2023: 702-710
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2. RESEARCH METHOD
Let’s find the optimal value of the objective function proposed in the scientific work of Lin and Yeh [11].
It is necessary to present the investigated multiservice network as a queuing model according to the
international Kendall classification of the type 𝑀𝑖/ 𝐼𝑗 / 𝑅∞𝑛 / 𝑑1𝑛. Here 𝑀𝑖 is the rate of incoming requests to
the multiservice network, which is expressed by the law of exponential distribution. 𝐼𝑗 − the system operates
in real reliability mode. 𝑅∞𝑛 is the service method with 𝑛-wait indefinite time. 𝑑1𝑛 is the direct order of
servicing 𝑛-requests in the systems. Conventionally, the queuing systems (QS) is divided into two parts: the
part in which needs arise is called the served system (population, part of production), and the part that accepts
requirements and satisfies them is called the service system (transport, post office, shops). The queuing
systems include: 1) a source, 2) an incoming flow of requests, 3) a queue, 4) a server, and 5) an outgoing
flow of serviced requests. Now it is necessary to calculate the logical-probabilistic technical parameters of
the developed model (Figure 1).
Figure 1. Request servicing model in a multiservice network for research the main parameters
In accordance with the developed model, two basic incidental processes take place in these research
systems: the expectation process, which is described by an incidental time 𝑡𝑧. As well as the service process,
which is characterized by a random time 𝑡𝑐𝑏. According to Kendall’s laws, due to additivity, we calculate the
service time of a random request 𝑡𝑠:
𝑡𝑠 = 𝑡𝑧 + 𝑡𝑐𝑏 (1)
The possibility of betimes delivery of applications for this model is defined as:
𝑄𝑏 = 𝑧(𝑠) · 𝑥(𝑠), 𝑅𝑒𝑠 ≥ 0 (2)
Where 𝑧(𝑠) is the integrated Laplase-Stilles transform of the distribution function of the waiting time for
requests; 𝑥(𝑠) is the integrated Laplase-Stilles transformation of the distribution function of the service time
of applications; 𝑅𝑒(𝑠 ≥ 0) is a constraint according to which the relation of (2) is satisfied only under the
condition 𝑠 ≥ 0.
Taking into account that in this system the processes of failure and recovery of serviced messages
occur, we define the expression for 𝑥(𝑠) using this expression:
𝑥(𝑠) =
𝜇(𝑠+𝑑)
(𝑠+𝑑)(𝑠+𝜇)+𝑐𝑠
(3)
And the expression for 𝑧(𝑠) will have the form:
𝑧(𝑠) =
(1−𝜆𝑠1)𝑠[1+
𝑐
𝑑+𝑐
]𝑘𝑔
𝑠−𝜆+𝜆𝑥(𝑠)
(4)
Here 𝑠1 = 1/𝜇𝑘𝑔.
Given the known parameters 𝑥(𝑠), 𝑧(𝑠), the expression for 𝑄𝑏 will look like this:
𝑄𝑏 = 𝑧(𝑠) · 𝑥(𝑠) =
𝜇𝑘𝑔−𝜆
𝜇𝑘𝑔−𝜆+𝑠[1+
𝜇𝑘𝑔𝑘𝑝
𝑠𝑘𝑔+𝑑
]
(5)
Using basic mathematical notation, the final mathematical formula for the possibility of timeous servicing of
requests from subscribers and users will look like this:
𝑄𝑏 = (𝜇𝐸 − 𝜆) / (𝜇𝐸 – 𝜆 + 𝑠𝐸) (6)
{
𝑠 > 0, 𝜇𝐸 ≥ 𝜆, 𝜇𝐸 = 𝜇𝑘𝑔
𝑠𝐸 = 𝑠[1 + 𝜇𝐸𝑘𝑝𝑖/(𝑠𝑘𝑔, +𝑑𝑖)], 𝜇 = 𝐶⅀/𝑉𝑖, 𝑘𝑝𝑖 = 1 − 𝑘𝑔

705
Where: 𝑘𝑝𝑖 is the equipment lay-up coefficient in the multiservice network, 𝑘𝑔 is the network availability factor.
𝐶⅀ is the capacity of this network. 𝑉𝑖 is the mean percentage of number of 𝑖-requests. 𝜆 is arrival rate and traffic
frequency, average number of requests per queue as overall arrival rate increases. 𝜇 is the frequency of receipt
of requests for servicing applications in the network. 𝑐𝑖 is the intensity of correct operation of the equipment.
𝑑𝑖 is the speed of reduction of devices after a failure and 𝑠 is the rate of obsolescence of requests, under the
condition that the law of allocation of all accidental variables is exponential [12].
3. THE DECISION OF THE PROBLEM
The research of the influence of the availability factor of a multiservice network on the technical
parameters of this network was made on the basis of the developed model. Applying (2)-(5) for calculations [13].
This experiment was carried out at different values of the coefficient of readiness 𝐾𝑔 and load 𝜌𝑖 of the
multiservice network. Here, the value of the frequency of receipt of applications for their service remains
unchanged. The results of this experimental research on the developed model given in Table 1.
Table 1. Results of experimental research on the developed model
Availability factor 𝑘𝑔 The possibility of timeous servicing of incoming requests in a multiservice network
𝜆 𝜌𝑖 0.81 0.9 0.95 0.99 0.999
0 0 0.808 0.909 0.952 0.983 0.99
10 0.1 0.7875 0.898 0.946 0.981 0.989
30 0.3 0.725 0.869 0.931 0.976 0.986
50 0.52 0.612 0.816 0.904 0.967 0.980
70 0.7 0.346 0.689 0.84 0.946 0.968
80 0.81 0 0.526 0.759 0.92 0.953
Analysis of the table showing that in the failure of a network load on a multiservice network, a change
in the coefficient of readiness from 0.81 to 0.999 leads to an improvement in the probability of timely
circulation of applications − from 0.808 to 0.99. With an average network load (within, 𝜌𝑖 ≈ 0.52) from 0.612 to
0.98. At relatively high network loads (𝜌𝑖 ≈ 0.81) - from 0.81 to 0.953 parameters. The following figure shows
another exchange in the possibility of betimes communication services of applications from subscribers when
observed in cases of different values of the intensity of the ingoing flow of applications for fixed values of 𝐾𝑔
(Figure 2). Figure 3 shows the dependence of the probability of untimely calls for service on the availability
factor for different network parameters load [14].
Figure 2. Graph of the dependence of the probability
of timely delivery of requests on the load of the
multiservice network for various meanings of 𝐾𝑔
Figure 3. Graph of the relation of the possibility of
wrong servicing of applications on the values of the
applicability factor 𝐾𝑔 for different loads of the
These obtained results according to the developed model are the basis for determining the value of
the goal function in system analysis. Let us determine the statistical values of a multiservice network that
characterize the reliability parameter of the components and equipment of each level. We calculate the values
of the availability factor parameter 𝐾𝑔
𝑖
for each level and the multiservice network as a whole (Table 2).

 ISSN: 1693-6930
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Fulfillment of user requests to a certain extent depends on the reliable functioning of network components
and equipment at each level of the network and on the degree of its load. If we take into account the flow
parameters of the queuing system (QS) model [15] (Figure 1), we determine different assessments of the
probability of betimes service of applications and the probability of untimely service of applications that arise
due to poor quality and untimely service of subscribers and users.
In the Table 2, the designations are accepted: С: 𝐺 − 1 / 𝐾𝑡 − 1 − communication channel from the
gateway of the access level to the switch of the transport level. 𝐶𝑆𝑛 − a communication server that 𝑛-provides a
secure connection of service level servers to an external network (that is, to the multiservice network control level
equipment). 𝑅-router (service level router); 𝑆-service level servers; Т0, Т𝑉, 𝐾𝑔, Т0
𝑀
, Т𝑉
𝑀
, 𝐾𝑔
𝑀
- are the values of the
average uptime of the equipment for a certain period of time, the average downtime, the equipment availability
factor before and after the implementation of measures to improve reliability [16]-[20].
Table 2. Estimations of the parameters of the coefficient of readiness 𝐾𝑔
𝑖
of the equipment of each level of the
No Name of equipment Т0 Т𝑉 𝐾𝑔 Т0
м
Т𝑉
𝑀
𝐾𝑔
𝑀
Access level equipment 1 Gateway - first 8759 3.1 0.99966 8759 3.1 0.99966
2 Gateway - second 8550 4 0.99953 8551 3 0.99964
3 Gateway - third 9021 2.6 0.99971 9021 2.6 0.99971
4 Switch - first 8756 4 0.99954 8756 4 0.99954
5 Switch - second 8934 3 0.99966 8934 3 0.99966
6 Switch - third 8455 5 0.99941 8457 3 0.99964
7 𝐶: 𝐺 − first / К𝑡 - first 8455 5 0.99941 8457 3 0.99964
8 𝐺 − 2 / router - third 8453 3.3 0.9996 8458 2 0.99976
9 𝐺 − 3 / router - second 9021 5 0.99945 9025 2 0.99978
10 К𝑑 - first / К𝑡- first 8756 4 0.99954 8756 4 0.99954
11 К𝑑 - second / router - third 8934 3 0.99966 8934 3 0.99966
12 К𝑑 - third / К𝑡 - second 8453 4 0.99942 8456 4 0.99963
13 Т𝑑2 / К𝑡 - First 8456 6 0.99940 8456 2 0.99968
14 Т𝑑3 / router - third 8758 3 0.99965 8758 3 0.99965
Transport equipment 15 Switch – first (К𝑡 - first) 8753 6 0.999427 8756 4 0.99965
16 Switch – second (К𝑡 - second) 8932 5 0.99944 8933 4 0.99955
17 Switch – third (К𝑡 - third) 8456 4 0.99953 8458 2 0.99976
18 Router - first 8756 5 0.999429 8757 4 0.99954
19 Router - second 8452 3 0.99943 8453 5 0.99964
20 Router - third 9019 4.6 0.9996 9020 3.4 0.99962
21 С: К𝑡 - first / router - first 8756 5 0.999429 8757 4 0.99954
22 Router- first / router- third 9016 3.2 0.99964 9017 1.5 0.99983
23 К𝑡 - first / router - second 8453 3.3 0.9996 8458 2 0.99976
24 К𝑡 - second / router - third 8933 4 0.99955 8935 2 0.99978
25 К𝑡 - third / router - second 8454 3.4 0.9997 8459 2.3 0.99977
26 Router- first / softswitch 9018 3.5 0.9996 9019 3.5 0.99961
27 Router- second / softswitch 9016 3.2 0.99964 9017 1.5 0.99983
28 Router- third /softswitch 9012 2.3 0.99970 9013 0.4 0.99995
29 К𝑡 - second /softswitch 9025 3 0.99980 9032 4 0.99965
Soft-switch 30 Softswitch 8753 1 0.9999 8756 7 0.999313
31 Softswitch/𝐶𝑆𝑛 8543 1.9 0.99985 8545 9 0.99884
Service level equipment 32 Server - first (𝑆1) 9015 0.5 0.99994 9016 6 0.999334
33 Server – second (𝑆2) 8750 0.3 0.99996 8755 5 0.999429
34 Server – third (𝑆3) 8930 0.1 0.999989 8932 5 0.99944
35 Server – fourth (𝑆4) 8454 0.2 0.999976 8456 4 0.999527
36 𝐶𝑆𝑛 8755 0.12 0.999989 8760 8 0.99898
37 Router 9023 1.0 0.9999 9029 5 0.99945
38 С: 𝑅 / 𝐾𝑆 9012 4 0.99966 9013 9 0.99910
39 Router / server1 8752 2.5 0.9997 8756 4 0.99954
40 Router / server2 8931 3 0.99967 8932 5 0.99944
41 Router / server3 8456 4 0.99953 8458 2 0.99976
42 Router / server4 8754 2.2 0.99976 8758 9 0.99887
4. RESULTS AND DISCUSSION
Based on the obtained results, the dependence of the probability estimate of untimely service of the
request Pun and the frequency of receipt and 𝜆 of received requests in the multiservice network determines the
estimate of cost losses, that is:
𝐶𝑁𝑇 = 𝑓(𝑃𝑢𝑛, 𝜆) (7)

707
The estimate of 𝑃𝑢𝑛 depends on the coefficient of readiness, i.e., 𝑃𝑢𝑛 = 𝑓(𝑘𝑔), and the amount of cost reduction
is a function of the coefficient of readiness 𝐶𝑝 = 𝐹[𝑓(𝑘𝑔), 𝜆)]. Suppose that in a multiservice network with
different network load intensity, there are three streams of requests (voice, video streams and data), then the
losses from non-fulfillment of requests will be of three types, summing them up, we determine the sum of the
total losses. In the next step, we determine the amount of costs required to increase the cost of Kg. Let’s use the
method described in the second part of this scientific work. To make a specific decision on technical
operation, certain costs are required. Their significance varies depending on the category of user requests.
Maintenance engineers know that relatively little investment is required when making preventive
maintenance decisions. And localization of equipment and restoration are quite expensive. On Figure 4
shows a graph of cost growth for another category adopted for the computational experiment. The first two
categories of technical operation solutions are used when the value of the availability factor parameter is
normal, and losses occur due to untimely requests for servicing requests and due to uneven distribution of the
network load in the network [21]-[23].
The allocated funds for the network spent on the execution of distribution and redistribution
operations. As a result of the operations of the named classes of technical operation − due to the transfer of
flows from the overloaded part of the network to unloaded sections − the average time of request execution is
reduced. This leads to a decrease in the probability of request loss, and hence to a decrease in cost losses
(Figure 5(a) and Figure 5(b)) [24], [25]. If the value of 𝐾𝑔 is below the norm, the allocated funds for the
network are distributed according to 𝐶𝑍 between solutions of 3 and 4 classes of technical operation. In the
first step, we calculate the total amount of costs and expenses. Which are allocated for the implementation of
the main solutions of the “localization” class. Next, we calculate the technical parameter 𝐾𝑔.
If the mathematical expression is met:
𝐾𝑔 ≥ 𝐾𝑔𝑑𝑜𝑝 (8)
Then 𝑃𝑁𝑇, 𝐶𝑁𝑇, and, 𝐶⅀ = 𝐶𝑍𝑇 + 𝐶𝑁𝑇 calculated.
If the mathematical expression is not met, the next option for distributing costs for this category of
technical operation is selected and condition (2) is checked. Going through the options, the option determined
in which 𝐶 has a minimum value. If (8) is not met, the value of the distributed amount of network costs
increases, that is, a gradual transition to the fourth category of decisions is made, and so on until (8) is met.
When determining the desired variant, the values of the parameters 𝑃𝑁𝑇, 𝐶𝑁𝑇 and 𝐶⅀ = 𝐶𝑍𝑇 + 𝐶𝑁𝑇 calculated.
The equipment of the control and service levels is made of highly reliable elements, and therefore the
parameters of their reliability, as a rule, are in the normal range.
Models of access levels, transport and service presentation based on the presented resource by the control
system modernize their structure and calculate the reliability parameters of the elements. Based on the generated
version of the multiservice network (MSN) structure, the process of servicing user requests is modeled and the
network parameters characterizing the quality of service are calculated and the company’s losses are determined
that have arisen due to residual unreliability during its operation based on the considered version of the network
structure. The value of the objective function is calculated and compared with the value obtained in the previous
version. If the value has decreased, the results of this variant are saved, the results of the previous variant are
discarded.
{𝐶𝑍𝑇}𝑖 = 𝑏(𝑑) × {𝐶𝑍𝑇}𝑖 + 𝑏(𝑡) × {𝐶𝑍}𝑖 + 𝑏(𝑢) × {𝐶𝑍𝑇}𝑖 + 𝑏(𝑢𝑠) {𝐶𝑍𝑇}𝑖 (9)
The coefficients b(u) and b(us) are equal to zero and will be written as:
{𝐶𝑍𝑇}𝑖 = 𝑏(𝑑) × {𝐶𝑍𝑇}𝑖 + 𝑏(𝑡) × {𝐶𝑍𝑇}𝑖 (10)
If the options for forming the network structure are finite, all options are considered and the option
that provides the minimum value of the objective function is selected. In the case of considering an ICN with
a complex structure, which contains many options (for example, more than a thousand), the search for a
minimum is carried out based on the use of heuristic methods for searching for an extremum. Figure 5(b)
shows the results of a scientific study. When the network reliability requirement condition is not met. On the
graph, along the 𝑦-axis, the values of the number of funds and costs aimed at improving the reliability of the
𝐶𝑍𝑇 ICN network are plotted. The sum of losses and costs resulting from the unreliable operation of
individual components of the 𝐶𝑁𝑇 ICN network. Also the 𝑠𝑢𝑚𝛴𝐶⅀ = 𝐶𝑍𝑇 + 𝐶𝑁𝑇. On the abscissa options for
the distribution of funds and costs for improving reliability. As can be seen from the curves, on the 1st graph
in the 3rd variant, on the 2nd graph - in the 4th variant, the objective function extremum is reached.

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The following figures show the result of a scientific experiment to determine the minimum score of the
objective function. Which ensures the fulfillment of the requirements for the reliability of a multiservice
communication network, using the Matlab software environment. Figure 6 shows the result of the simulation
modeling of all devices of the subscriber access level of the ICN. Figure 7 demonstrates the simulation results of
modeling transports layer equipment, specifically routers and, switches of the 3-d layer. Figure 8 represents the
simulation results of the control plane hardware, specifically the Softswitch hardware. Figure 9 shows the
simulation results of the service level equipment, namely the equipment of various servers.
Figure 4. Distribution diagram of network costs required to implement solutions for different categories of
technical operation
(a) (b)
Figure 5. The results of the computational experiment of determining values of the parameters of the
objective function for costs and expenses, under the condition: (a) Kg> = Kgdop, and (b) under the condition
Kg< Kgdop
Figure 6. Results of simulation modeling of access
layer equipment
Figure 7. Results of simulation modeling of transport
layer equipment

709
Figure 8. Results of simulation modeling of
management layer equipment
Figure 9. Results of simulation modeling of service
layer equipment
5. CONCLUSION
In this scientific experiment, according to the input statistical applications, the parameters of the
availability factor of network equipment of each level are sequentially calculated. Equipment has been identified
for which the requirements of the required level of reliability parameter are not met. Next, the amount of the
allocated amount is indicated for the type of technical operation “localization” and the operation of its distribution
between the subscriber access level and the transport levels is performed. Each subsequent execution of the
described operation determines an acceptable (optimal) resource allocation option that satisfies the requirement of
the required level of reliability. The results of simulation modeling and a scientific experiment will allow the
authors to further study the probabilistic and temporal parameters of an ICN network, taking into account the costs
and expenses that arise during operation in certain sections of multiservice networks.
ACKNOWLEDGEMENTS
We thank the Research Center for Telecommunications Network Laboratories of the TUIT named
after Muhammad al-Wkharizmi of Uzbekistan for the research program, sponsorship, and financial support.
The work was done with the support of our Ministry of Digital Technologies. We thank the head of the
Department of Telecommunication Engineering and the heads of these laboratories.
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BIOGRAPHIES OF AUTHORS
Alevtina Aleksandrovna Muradova received the M.Sc. degree in 2009 and
Ph.D. degree in models and algorithms of a research of reliability indicators of a multiservice
communication network in 2019 in the Tashkent University of information technologies
named after Muhammad Al-Khwarizmi in Uzbekistan. Currently, she is Assist. Prof. in
Telecommunication engineering. Dr. Alevtina has more than 22 years of experience and she
has supervised B.Sc final year projects, and she has supervised M.SC. Her research interests
are in telecommunication and computer systems, telecommunication networks and devices,
distribution of information, Sensors networks and IoT, Fuzzy Logic, Modular Neural
Networks. She has more than 60 publications in international journals and conferences. She
has authored a monograph on models and algorithms of a research of reliability indicators of a
multiservice communication network. She improved her qualifications at Korea University
KAIST in the direction of program engineering and received a certificate from this university.
She can be contacted at email: a.muradova1982@inbox.ru.
Dilbar Turgunovna Normatova received the BSc in 1995 year in Tashkent
Electro technical Institute of Communications. The BSc from automatic telecommunication in
Tashkent Electro technical Institute of Communications in Uzbekistan. She supervised on
students of BSc. She is a Senior Lecturer in Department of “Telecommunication engineering”
of Tashkent University of Information Technologies named after Muhammad Al-Khwarizmi.
She has more than 40 publications in international journals and conferences. Her research
interests are in Telecommunication engineering, Telecommunication networks and
commutation systems, Sensors networks, Software Engineering, Computer Network and data
security. She can be contacted at email: normatova_1972@mail.ru.

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