scholarly journals ANALYTICAL SIMULATION METHODS DETERMINING THE BASIC CHARACTERISTICS OF A TELECOMMUNICATION NETWORK WITH DIFFERENT COMMUNICATION CHANNELS AND A CHANGING STRUCTURE

2021 ◽  
Keyword(s):  
Telecommunication Network ◽  
Waiting Times ◽  
Communication Channels ◽  
Analytical Models ◽  
Simulation Methods ◽  
Message Delivery ◽  
Transmission Modes ◽  
Telecommunications Network ◽  
Communication Center ◽  
Basic Characteristics

The article deals with the problems of determining the main quality indicators of a telecommunications network with different types of communication channels and the time-varying structure of their functioning to ensure the specified reliability and time of delivery of protected messages to information consumers. The main method of solving this problem is using analytical and simulation methods on personal computers. Comparison of the obtained simulation results with the results of analytical models are also given. The developed algorithms for simulation of the process of transmitting messages in various transmission modes allow obtaining distribution of time for message delivery in the system, waiting times for messages in the communication center and many other benefits.

scholarly journals Determining the capacity of the self-healing network segment

2021 ◽  
Vol 5 (2) ◽  
pp. 114-119
Author(s):  
Nina Kuchuk ◽  
Oleksandr Shefer ◽  
Galina Cherneva ◽  
Frhat Ali Alnaeri
Keyword(s):  
Network Topology ◽  
Information Transfer ◽  
Telecommunication Network ◽  
The Self ◽  
Self Healing ◽  
Message Delivery ◽  
Delivery Time ◽  
Network Resources ◽  
Telecommunications Network ◽  
The Subject

An approach to determining the bandwidth of the self-healing segment of the data network is proposed. The subject of the study are autonomous segments of the telecommunications network, which have the property of self-healing. The object of research is the process of information transfer between nodes of an autonomous segment. The scientific novelty is to improve the method of determining the capacity of the self-healing segment of the telecommunications network with limited network resources by applying the criterion of ensuring the minimum time of information delivery at a given limit of possible probability of loss. The following tasks were solved: a mathematical model of the self-healing segment of the telecommunication network in the form of a queuing system was developed; the proposed method of calculating the degree of channel congestion. Conclusion: the proposed approach made it possible to calculate the bandwidth of the communication channels of the self-healing segment of the telecommunications network and the required amount of buffer memory with a known network topology and a given gravity matrix, providing the required values of failure probability and guarantee minimum message delivery time.

scholarly journals Choice of the Optimal Solution for Introducing vIMS Technology in the Infrastructure of the Telecommunication Network

2020 ◽  
pp. 30-33
Author(s):  
Andrey Andreevich Alekseenko ◽  
Yuri Nikolaevich Belov
Keyword(s):  
Technological Progress ◽  
Driving Forces ◽  
Telecommunication Network ◽  
Optimal Solution ◽  
Ip Multimedia Subsystem ◽  
Literary Sources ◽  
Telecommunications Network ◽  
Network Equipment ◽  
Main Ideas ◽  
Functional Components

The article focuses on the main driving forces that force telecom operators to introduce the latest achievements of scientific and technological progress into their networks and provide subscribers with new opportunities and advantages. One of the latest advances in the world of telecommunications is the IP Multimedia Subsystem (IMS). Based on literary sources, a review of the IMS concept is carried out, the main ideas embodied by it are highlighted. The paper provides a solution for the implementation of virtual IMS technology in the telecommunications network infrastructure, defines the main network equipment on which the functional components of the vIMS network are implemented.

Health protection messaging for populations susceptible to air pollution during landscape fire smoke events: an integrative review

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Sheriden Amanda Keegan ◽  
Kazi Mizanur Rahman
Keyword(s):  
Air Pollution ◽  
Grey Literature ◽  
Communication Channels ◽  
Relevant Information ◽  
Health Protection ◽  
Integrative Review ◽  
Health Impacts ◽  
Message Delivery ◽  
Message Content ◽  
Susceptible Populations

Abstract Public health communication strategies to protect against the health impacts of air pollution due to landscape fire are becoming increasingly urgent in Australia. How well the public, particularly susceptible populations, are receiving, understanding and acting upon health protection messages related to smoke events is poorly understood. This integrative review sought literature relevant to health protection messaging for smoke events, including appropriate message content and suitable message delivery, with a focus on vulnerable and sensitive populations. Using an exhaustive search strategy of databases and grey literature, 26 relevant articles were identified and thematically analysed to produce a synthesis of findings on key themes. Findings indicated that a variety of traditional and modern communication channels are needed to ensure health messages are received by those most at-risk and should consider locally relevant information. A key theme to emerge in this review was the need for health messaging to susceptible populations to commence in advance of bushfire seasons to facilitate health protective actions being taken. During the acute-phase of smoke events, messages that were short with non-technical advice, were recalled and complied with more often. The need to improve the consistency of message content was a recurrent theme in the literature and suggested a need for greater interagency collaboration and communication. Preliminary evidence from smartphone app studies show promising results for targeted communication, however, more robust research is needed on the efficacy of these communication channels. Further research is also needed on the health impacts of smoke events, related compounding issues and strategies to reduce health risks, to better inform health protection messaging to susceptible populations.

Evaluating the Impacts of Iteration on PD Processes by Transforming Task Network Models Into System Dynamics Models

2010 ◽  
Author(s):  
H. Nam Le ◽  
David C. Wynn ◽  
P. John Clarkson
Keyword(s):  
System Dynamics ◽  
Design Process ◽  
Network Modeling ◽  
Network Models ◽  
Dynamics Simulation ◽  
Analytical Models ◽  
Simulation Methods ◽  
Process Architecture ◽  
Dynamics Models ◽  
The Impact

Iteration is unavoidable in the design process and should be incorporated when planning and managing projects in order to minimize surprises and reduce schedule distortions. However, planning and managing iteration is challenging because the relationships between its causes and effects are complex. Most approaches which use mathematical models to analyze the impact of iteration on the design process focus on a relatively small number of its causes and effects. Therefore, insights derived from these analytical models may not be robust under a broader consideration of potential influencing factors. In this article, we synthesize an explanatory framework which describes the network of causes and effects of iteration identified from the literature, and introduce an analytic approach which combines a task network modeling approach with System Dynamics simulation. Our approach models the network of causes and effects of iteration alongside the process architecture which is required to analyze the impact of iteration on design process performance. We show how this allows managers to assess the impact of changes to process architecture and to management levers which influence iterative behavior, accounting for the fact that these changes can occur simultaneously and can accumulate in non-linear ways. We also discuss how the insights resulting from this analysis can be visualized for easier consumption by project participants not familiar with simulation methods.

scholarly journals Experimental Evaluation of the Availability of LoRaWAN Frequency Channels in the Czech Republic

Sensors ◽  
2021 ◽  
Vol 21 (3) ◽  
pp. 940
Author(s):  
Vojtěch Novák ◽  
Michal Stočes ◽  
Tereza Čížková ◽  
Jan Jarolímek ◽  
Eva Kánská
Keyword(s):  
Information System ◽  
Urban Agriculture ◽  
Precision Agriculture ◽  
Energy Savings ◽  
Statistical Data ◽  
Communication Channels ◽  
Message Delivery ◽  
The Czech Republic ◽  
Sensor Devices ◽  
Lower Success Rate

LoRaWAN communication allows you to create IoT (Internet of Things) solutions across many disciplines. A specific field of application is precision agriculture, which demands this technology mainly due to the fact that it is possible to create low power sensor devices with it. However, in densely populated areas, a lower success rate of message delivery can be observed on some communication channels. For example, this can have an impact on urban agriculture projects. After performing an experiment and analytical–statistical data processing using the Geographic Information System (GIS) tool ArcGIS Insights, it was shown that the success of message delivery on the basic LoRaWAN channel (868.3 MHz) is lower than for the others. Therefore, to ensure higher reliability and thus energy savings, it is appropriate to optimize the use of frequency channels.

scholarly journals SYNTHESIS OF SUBSYSTEM OF INTELLIGENT MONITORING OF INFORMATION AND TELECOMMUNICATION NETWORK OF DEPARTMENTAL SITUATIONAL CENTER

2021 ◽  
Vol 2021 (3) ◽  
pp. 64-81
Author(s):  
Vladimir Vladimirovich Karetnikov ◽  
Nikita Pavlovich Bydko ◽  
Vladimir Vasilevich Allakin
Keyword(s):  
Intelligent Agents ◽  
Telecommunication Network ◽  
Public Information ◽  
Technical Condition ◽  
Critical Element ◽  
Network Resources ◽  
Maximum Probability ◽  
Parametric Synthesis ◽  
Intelligent Monitoring ◽  
Telecommunications Network

The problem statement: based on the analysis of the features of the development of modern public information and telecommunications networks (ITN), which consist in the geographical dispersion of network resources, sources and recipients of information; the pulsating nature of network traffic; heterogeneity of elements and applied network technologies; randomness of functioning; “intolerance” to management; the essential inconsistency of the main char-acteristics and the impossibility of a complete mathematical description, make it impossible to use the existing methods of control of the information and telecommunications system and the need to synthesize its subsystem of intellectual monitoring, as well as to develop new methods based on intelligent approaches. The purpose of the work is to provide synthesis of the subsystem of intelligent monitoring of the information and telecommunications network of the Ministry of Transport of the Russian Federation, as one of the key segments of the situation center of the department being created at the present time. Structuring of the controlled space by the terms “monitoring zone”, “critical element” and “technical condition classes” form the basis of a new approach to intelligent monitoring, regardless of the constant improvement (evolution) and heterogeneity of heterogeneous network infrastructures. The values obtained in the course of parametric synthesis of acceptable optimal values of the degree of loading of channels with measuring information make it possible to calculate the throughput of technological channels of tele-measurement-tele-signaling and the necessary amount of buffer memory with a known network topology and a given gravity matrix, providing the average minimum delivery time of intelligent agents (packets of measuring information) and the value of the maximum probability of failure in their service within acceptable limits. Based on the proposed hypergraph of the topological relationship of the monitoring zones of ITN of a household, the structure of its monitoring subsystem is constructed at the levels of fragmentation during the aggregation of controlled processes. The obtained results of the structural and parametric synthesis form the basis of the conceptual model of intelligent monitoring of ITN of the department

scholarly journals Simulation of RPAS/UAV Data Traffic Using Space-Air-Ground Networks

2021 ◽  
Author(s):  
Svitlana Ilnytska ◽  
Fengping Li ◽  
Andrii Grekhov ◽  
Vasyl Kondratiuk
Keyword(s):  
Data Transmission ◽  
Satellite Communication ◽  
Heavy Traffic ◽  
Effective Interaction ◽  
Communication Channels ◽  
Base Station ◽  
Data Traffic ◽  
Integrated Network ◽  
Traffic Characteristics ◽  
Transmission Modes

Abstract The latest applications of Remotely Piloted Air Systems (RPAS) for telecommunication data transmission require reliable two-way communications. In this regard, it is necessary to answer two questions: how can existing space, air and ground networks be combined for effective interaction with RPASs during heavy traffic and under what data transmission modes can the required Quality of Service (QoS) be ensured. To answer such questions, this study was undertaken. Models of space, air and ground networks were created to simulate remote data transmission. Models including the Base Station (BS), the Public Terrestrial Network (PTN), the Low-Orbit Satellite, and different number of RPASs were designed using NetCracker Professional 4.1 software. For the first time, quantitative characteristics of traffic in Space-Air-Ground Integrated Network (SAGIN) communication channels were obtained. The Average Utilization (AU) dependencies of BS links on the Transaction Size (TS) were obtained and analyzed. BS links with different bandwidths were studied. Effect of the Bit Error Rate (BER) on the AU parameters was considered. The dependences of the dropped packets on the TS parameters were studied. SAGIN traffic characteristics for terrestrial and satellite communication channels were compared.

scholarly journals Models for Estimating the Potential Number of Ship Collisions

2015 ◽  
Vol 68 (4) ◽  
pp. 735-749 ◽  
Author(s):  
Zvonimir Lušić ◽  
Mirko Čorić
Keyword(s):  
Simulation Model ◽  
Analytical Approach ◽  
Analytical Models ◽  
Simulation Methods ◽  
Simulation Approach ◽  
Ship Collision ◽  
Analytical Expressions ◽  
Graphical Presentation

This paper analyses two different methods of estimating ship collision candidates. The first one is an analytical approach; accordingly, an overview of various analytical expressions for estimating the number of collision candidates for three main situations (encounter, overtaking, and crossing) will be presented. The second is a simulation approach: the paper will present how to simulate ship movements by replacing them with circles in order to obtain a graphical presentation of ship movements in the zone of danger, including the calculation of collision candidates. The applied simulation model will also feature three main situations, i.e. encounter, overtaking, and crossing, and the results of simulations will be compared with the results of analytical models. The results and conclusions should improve the existing models for obtaining the potential number of ship collisions and encourage new advanced simulation methods.

The Design and Application of Telecommunication Network Resources Abstract Model

2014 ◽  
Vol 602-605 ◽  
pp. 3451-3456
Author(s):  
Tao Shi ◽  
Peng Zhang ◽  
Fang Cheng
Keyword(s):  
Network Management ◽  
Management System ◽  
Telecommunication Network ◽  
Object Oriented ◽  
Network Resources ◽  
Network Management System ◽  
Resource Model ◽  
Network Resource ◽  
Telecommunications Network ◽  
Telecom Network

Model Tao Shi ,Peng Zhang and Fang Cheng School of Chongqing University of Posts and Telecommunications, Chongqing 400065, China [email protected] Keywords: telecommunications network resources, resource model, object-oriented, virtualization technology, network management system Abstract. In order to manage and utilize telecommunication network resources more effectively, aiming at the shortage of the resource management of telecom network management system, through the study the concept of the shared information data (SID) model in the new generation of telecom operation support system (NGOSS) , according to the characteristics of the telecommunications network resources, telecommunications network resource model with object-oriented approach is proposed and designed. Meanwhile, Combined with telecommunication network business resource model to illustrate the mechanism of telecom network resource by users applications in network management system. Experiments have proved that resource model can provide powerful support for complex network management.

Design of MEMS via Efficient Simulation of Fabrication

1996 ◽  
Author(s):  
Ted J. Hubbard ◽  
Erik K. Antonsson
Keyword(s):  
Mechanical Systems ◽  
Analytical Models ◽  
Simulation Methods ◽  
Computationally Efficient ◽  
Micro Electro Mechanical Systems ◽  
Efficient Simulation ◽  
Factors Influencing ◽  
Simulation Results ◽  
Novel Model

Abstract A novel model is introduced to simulate the fabrication of MEMS (Micro Electro Mechanical Systems). This approach provides computationally efficient and geometrically accurate simulation results by hybridizing a geometrical and cellular approach. Existing simulation methods, including numerical and analytical models, are examined. Factors influencing simulation results, such as fabrication conditions and etching regimes, are introduced and discussed. Simulation examples are presented and non-ideal effects are considered.

Sign in / Sign up

Export Citation Format

Share Document