Distributed Computer and Communication Networks: 23rd International Conference, DCCN 2020, Moscow, Russia, September 14–18, 2020, Revised Selected Papers (Lecture Notes in Computer Science)

This book constitutes the refereed post-conference proceedings of the 23rd International Conference on Distributed and Computer and Communication Networks, DCCN 2020, held in Moscow, Russia, in September 2020. The 54 revised full papers and 1 revised short paper were carefully reviewed and selected from 167 submissions. The papers cover the following topics: computer and communication networks; analytical modeling of distributed systems; and distributed systems applications. Preface Organization Contents Computer and Communication Networks Power Domain NOMA Without SIC in Downlink CSS-Based LoRa Networks 1 Introduction 2 LoRa Information Encoding 2.1 LoRa Chirp Spread Spectrum Modulation 2.2 LoRaWAN - MAC Layer 2.3 Link Budget 3 Proposed Multi-user Scheme 3.1 System Model 3.2 Receiver 4 Simulation Results 5 Conclusion References Simulation-Based Analysis of Mobility Models for Wireless UAV-to-X Networks 1 Introduction 1.1 Motivation 1.2 Related Works 2 System Model 2.1 Users Mobility 2.2 UAVs Mobility 3 Metrics of Interest 3.1 Coverage Probability 3.2 Average Fade Duration 4 Numerical Results 5 Conclusion References Structures and Deployments of a Flying Network Using Tethered Multicopters for Emergencies 1 Introduction 2 Tethered UAVs High-Altitude Platform 3 Flying Network for Emergency Using Tethered Multicopters 3.1 Collect Data from Sensor Filed in Flying Network for Emergencies Using Tethered Multicopters 3.2 Interaction of Flying Network for Emergencies Using Tethered Multicopters 3.3 Multimedia Transfers over the Flying Network for Emergencies Using Tethered Multicopters 4 Conclusion References Multipath Redundant Network Protocol Without Delivery Guarantee 1 Introduction 2 Developing Model of UDP Protocol Multipath Extension 3 Developing Computer Network Model Using Modified UDP Protocol 4 Experiments with Multipath Redundant Transmissions 4.1 Protocol Efficiency Evaluation Based on Criterion M 4.2 Protocol Efficiency Evaluation Based on Faultless and Timely Delivery Probability as a Efficiency Criterion 4.3 Protocol Efficiency Evaluation Based on Faultless Delivery Probability as a Efficiency Criterion 5 Conclusions References Modelling Multi-connectivity in 5G NR Systems with Mixed Unicast and Multicast Traffic 1 Introduction 2 System Model 3 Simulation Approach 4 Numerical Assessment 5 Conclusion References IoT Traffic Prediction with Neural Networks Learning Based on SDN Infrastructure 1 Introduction 2 Related Works 3 Problem Statement 4 The System Structure 4.1 Architecture of Infrastructure and Structure of Data 4.2 Artificial Neural Networks with Multi-step and Single Step Prediction 5 Simulation Results 6 Conclusion References Transmission Latency Analysis in Cloud-RAN 1 Introduction 2 System Model 3 Delay Components Evaluation 4 Numerical Analysis 5 Conclusion References Resource Queuing System with Preemptive Priority for Performance Analysis of 5G NR Systems 1 Introduction 2 Model Description and Analysis 2.1 Description of the System 2.2 System Analysis 2.3 Performance Metrics of Interest 3 Applications and Numerical Results 3.1 Applications Scope 3.2 Accuracy Assessment 3.3 Performance Evaluation 4 Conclusion References Redundant Servicing of a Flow of Heterogeneous Requests Critical to the Total Waiting Time During the Multi-path Passage of a Sequence of Info-Communication Nodes 1 Introduction 2 Options for the Formation of the Path for Phased Redundant Service of Requests in a Multi-level Cluster 3 Redundant Service for a Homogeneous Request Flow in a Group of Parallel Connected Nodes 4 Redundant Service with Preliminary Formation of Paths 5 Redundant Service of Heterogeneous Flow with the Formation of Copies of Requests 6 Comparison of Reserved Service Options 7 Conclusion References Agriculture Management Based on LoRa Edge Computing System 1 Introduction 2 Related Works 3 Precision Agriculture System Architecture Based on Edge Computing 3.1 Layer-Based Architecture 3.2 Edge Layer 3.3 Network/Cloud Layer 3.4 Application Layer 3.5 Simulation Results 4 Proposed Monitoring System for Precision Agriculture 4.1 The Basic Architecture of the Precision Farming Monitoring System 4.2 Sensor Node (Describe Sensor Node = MCU + Wireless Interface + Various Sensors) 4.3 Sensor Data Processing (Data Process on Edge, Prediction Method) 5 Experiment and Results 6 Conclusion References Dynamic Algorithm for Building Future Networks Based on Intelligent Core Network 1 Introduction 1.1 NFV-based EPC Architecture 1.2 SDN/NFV-based EPC Architecture 2 Related Works 3 Proposed Algorithm 4 Testbed Based on 5G Model Network 5 Results 6 Conclusion References Methods and Models for Using Heterogeneous Gateways in the Mesh LPWANs 1 Introduction 2 Structure of the LPWAN Networks 3 Analytical and Simulation Models 4 Simulation Results 5 Conclusion References Research on Using the AODV Protocol for a LoRa Mesh Network 1 Introduction 2 LoRa Overview 3 LoRa Mesh Networks 4 Routing in LoRa Mesh Networks 5 Network and Simulation Model 5.1 Network Model 5.2 Simulation Methodology and Parameter 6 Result Analysis 6.1 Analysis by Varying the Number of Nodes 6.2 Analysis by Varying Payload Length 7 Conclusion References On the Algebraic Theory of Loop Free Routing 1 Introduction 2 Related Works 3 Semirings and Graphs 4 Sufficient Conditions for Loop Freedom in Distance Vector Routing 5 Monotone Routing 6 Loop Free Routing in a Non-monotone Algebra 7 Conclusion References Queueing System with Two Unreliable Servers and Backup Server as a Model of Hybrid Communication System 1 Introduction 2 Mathematical Model 3 Process of the System States 4 Stationary Distribution 5 Vector Generating Function of the Stationary Distribution. System Performance Characteristics 6 Numerical Results 7 Conclusion References Flexible Random Early Detection Algorithm for Queue Management in Routers 1 Introduction 2 Related Works 3 Flexible Random Early Detection Algorithm 4 Simulation Experiments 5 Conclusion References Architecture and Functionality of the Collective Operations Subnet of the Angara Interconnect 1 Introduction 2 Architecture of the Collective Operations Subnet of the Angara Interconnect 3 Characteristics of the Collective Operations Subnet of the Angara Interconnect 4 Angara Interconnect Design Versions 5 Conclusion References The Model of WBAN Data Acquisition Network Based on UFP 1 Introduction 2 Approaches to Collecting Data from WBAN 3 Issues to Solve 3.1 Network Technology and Topology 3.2 Type of UFP 3.3 Antennas for WBAN and UFP 3.4 Interconnecting Protocol 3.5 Security of Data Transmission 4 Conclusion References Development and Investigation of Model Network IMT2020 with the Use of MEC and Voice Assistant Technologies 1 Introduction 2 Goal of Investigation 3 Related Works 4 VA Simulation Model 5 The Results of the Simulation 6 VA Simulation Model for 5G/IMT-2020 Networks with MEC 7 Conclusion References On Overall Measure of Non-classicality of N-level Quantum System and Its Universality in the Large N Limit 1 Introduction 2 The Wigner Function of a Density Operator of N-level System 3 Measures of Non-classicality of State and Overall Quantum System 4 Global Measure of Quantumness as Geometric Probability 4.1 Quantumness of Hilbert-Schmidt States for Different SW Kernels 4.2 The Large N Limit of Global Non-classicality 5 Conclusions References Analytical Modeling of Distributed Systems Queues with Markovian Arrivals, Phase Type Services, Breakdowns, and Repairs 1 Introduction 2 Model Description and Steady-State Analysis 2.1 Model Description 2.2 Generator of the Markov Process 2.3 Stability Condition 2.4 Steady-State Equations 2.5 Additional Useful Results 2.6 Effective Service Time 2.7 Sojourn Time Distribution 2.8 System Performance Measures 3 Illustrative Examples for MAP/PH/1-system 3.1 MAP for Arrivals 3.2 PH-distributions for Services, Breakdowns, and Repairs 4 Simulation of MAP/PH/c System 5 Concluding Remarks References Statistical Analysis of the End-to-End Delay of Packet Transfers in a Peer-to-Peer Network 1 Introduction 2 Related Work 3 Statistical Analysis of the End-to-End Delay 3.1 Asymptotic Distribution of the E2E and Maximal P-h Delays 3.2 Nonparametric Statistical Estimation 3.3 An Illustrative Example 4 Conclusions and Open Problems References Multidimensional Central Limit Theorem of the Multiclass M/M/1/1 Retrial Queue 1 Introduction 2 Model Description and Problem Statement 3 Asymptotic Analysis Under the Long Delay Condition 3.1 Asymptotic of the First-Order 3.2 Asymptotic of the Second-Order 4 Example 5 Conclusion References A Retrial Queueing System in Which Server Searches to Accumulate Customers for Optimal Bulk Serving 1 Introduction 2 Model Description 3 Mathematical Formulation 4 Steady-State Analysis 4.1 Stability Condition 4.2 Stationary Distribution 5 Performance Measures 6 Numerical Example 7 Conclusion References Approximate Analysis of the Queuing System with Heterogeneous Servers and N-Policy 1 Introduction 2 The Model 3 Exact Method 4 Approximate Method 5 Numerical Results 6 Conclusion References Analysis of a Resource-Based Queue with the Parallel Service and Renewal Arrivals 1 Introduction 1.1 Related Works 1.2 Our Contributions 2 Mathematical Model 3 Dynamic Screening Method 4 Asymptotic Analysis 5 Simulation and Numerical Examples 6 Conclusion References Two-Phase Resource Queueing System with Requests Duplication and Renewal Arrival Process 1 Introduction 2 Mathematical Model 3 Integro-Differential Equations 4 Gaussian Approximation 5 Numerical Example 6 Conclusion References Deep Neural Networks for Emotion Recognition 1 Introduction 2 Development of a Computer System for Paralinguistic Analysis of Emotions 3 Basic Models of Deep Neural Networks Used in Emotion Recognition 4 Data Description and Preliminary Processing 5 Computer Studies of Emotion Recognition Models 6 Discussion of Results and Conclusions 7 Conclusion References A Simulation Approach to Reliability Assessment of a Redundant System with Arbitrary Input Distributions 1 Introduction 2 Problem Statement and Model Description 2.1 Simulation Model for Calculating Steady-State Probabilities of "426830A GIN/GI/1 "526930B System 2.2 Simulation Model for Assessment of the "426830A GIN/GI/1 "526930B System Reliability 3 Conclusion References Problem of Overbooking for a Case of a Random Environment Existence 1 Introduction 2 Main Results 3 Numerical Example 4 Optimization of an Economical Criterion 5 Numerical Example (Continue) 6 Conclusion References Optimization of Signals Processing in Nodes of Sensor Network with Energy Harvesting and Expenditure for Admission and Transmission 1 Introduction 2 Mathematical Model 3 Process of System States and Its Stationary Distribution 4 Computation of Performance Measures 5 Numerical Examples 6 Conclusion References The Analysis of Resource Sharing for Heterogenous Traffic Streams over 3GPP LTE with NB-IoT Functionality 1 Introduction 2 Model Description 3 Recursive Algorithm 4 Enhancements of Recursive Algorithm 5 Numerical Assessment 6 Conclusion References Performance Measures of Emergency Services in Case of Overload 1 Introduction 2 Model Description 3 System of State Equations 4 Estimation of Characteristics for Large Load 5 Approximate Calculation of Performance Measures 6 The Usage of the Model for Elimination of PSAP Overload 7 Conclusion References Evaluation and Prediction of an Optimal Control in a Processor Sharing Queueing System with Heterogeneous Servers 1 Introduction 2 Mathematical Model and MDP Formulation 3 Estimation and Prediction for Optimal Thresholds 4 Conclusion References On Exponential Convergence of Dynamic Queueing Network and Its Applications 1 Introduction 2 Dynamic Routing 3 Main Results 3.1 Convergence of Process XS(t) 3.2 Convergence of Process XR(t) 3.3 Rate of Convergence 4 The Numerical Example 4.1 Further Work and Conclusion References Leader Nodes in Communities for Information Spreading 1 Introduction 2 Related Works 2.1 Graph Community Characteristics 2.2 Information Spreading Time 2.3 Leader Node Identification 2.4 Tail Index Identification 2.5 Test of Stationarity 3 Extremal Index Estimation 3.1 Extremal Index of the Community 4 Simulation Study 4.1 Community and Leader Election 4.2 Evaluation of the Computation Time 5 Conclusion References Sensitivity Analysis of a k-out-of-n:F System Characteristics to Shapes of Input Distribution 1 Introduction 2 Problem Setting and Notation 3 Steady State Probabilities. 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