Communication Service Networks Research Articles

DEVELOPMENT OF A SYSTEMIC MODEL OF THE QUALITY OF SERVICE IN INFOCOMMUNICATION COMMUNICATION NETWORKS TO ENSURE LOW TRAFFIC DELAY

The question of quality of service in networks of the latest generation is studied. The impact of heterogeneous traffic on the main quality of service indicators reflecting the probability of packet loss and delivery delay over time is evaluated. A model of quality of service in information communication networks has been developed to ensure low traffic delay. Taking into account the concept of quality in information communication networks, the issue of quality of service in networks of the latest generation becomes important from the standpoint of ensuring high reliability and reliability of information transmission, which significantly affects the quality of services provided to the user. This, of course, determines the need to control various parameters of equipment and communication lines, which are determined both by the features of the transmission system and by the parameters of leased channels and tracts. The basis for determining the quality of service, as mentioned above, is the provision of the international concept of quality of service (QoS). According to the requirements of the compliance control model proposed in the concept, the approach to quality indicators is structurally related to the OSI reference model. The main advantages of modern technologies of information communication networks are undoubtedly 5G technologies, which already support such resource-intensive services as massive machine-to-machine communication, ultra-reliable communication and low-latency communication. All of them require high data transfer rates, low millisecond latency, and connectivity of millions of devices. At the same time, it is necessary to ensure a high level of quality of service (QoS), which plays an important role in 5G technologies. The proposed model makes it possible to evaluate not only the quality of service of the combined traffic flow of Internet of Things, tactile Internet, and augmented reality services, but also the delivery delay and the probability of packet loss. The simulation results showed that the parameters of the quality of service of the traffic of the Internet of Things and other modern applications differ significantly during the service of the aggregate flow. When studying the service of aggregated traffic, it was established that the probability of packet loss is higher for it than for Internet of Things traffic. In addition, this difference becomes more significant when the intensity of the incoming load increases.

Capabilities of Business and Operational Support Systems for Pre-Commercial 5G Testbeds

With the visions and high ambitions for the 5G ecosystem, mobile network operators (MNOs) and communication service providers (CSPs) embark on increased market complexity, with regard to volume and variety of users, customers, services, and partners. Digitalized, frictionless, and growth-enabling support system journeys become imperative. This article builds on the analysis of users' challenges and requirements when accessing support systems and proposes an architectural design for the 5G platforms' system support stack. It suggests the most important capabilities that 5G business support systems and operation support systems should have and explains why they are important from the perspective of pre-commercial 5G testbeds/experimental platforms. Our study focuses on the three main actors interacting with such platforms, namely the MNO/CSP, which operates and contributes infrastructure to the testbed; the vertical enterprise customer, who consumes services for performing experiments; and the third-party service provider, which complements the testbed by offering its own services through the platform or performs testing of its services under realistic conditions.

Using Augmented Reality and Drones in Tandem to Serve Smart Cities

Augmented Reality Technologies as such have been known since the first decade of the 21st century. However, due to the relatively high costs of terminal equipment, the lack of mass demand in industries, their unpreparedness to implement augmented reality in production processes, the limited use of augmented reality in the educational process, etc., this technology did not become networked. In the broadest sense of this word, the traffic generated by augmented reality significantly affects both the principles of network construction and its planning. The article is devoted to studying the interaction of augmented reality applications and control methods for Unmanned Aerial Vehicles. The study was carried out experimentally using the developed experimental stand. During the experiment, an augmented reality application was used to control the UAV. The assessments of the quality of service of the network and subjective evaluations of the quality of perception were obtained. The Hurst parameter was used to determine the relationship between the quality of communication network service and the quality of perception. The parameters of the communication network maintenance are determined to ensure the specified rate of perception when controlling the UAV using the augmented reality application.

Desain Panduan Audit Tata Kelola Sistem Informasi Boost The Order (SIBORDER) di PT Telekomunikasi Indonesia Menggunakan COBIT 2019

PT Telekomunikasi Indonesia Tbk (Telkom) is engaged in information and communication technology and network services. Information technology (IT) plays an important role in PT Telkom's business processes, so it needs to be managed using the Control Objectives for Business and Related Technology (COBIT) framework. COBIT 2019 accommodates new IT trends in business, so that it can serve as a guide for auditors, users and management to bridge the gap between risk, control, and technical problems at PT Telkom, especially in the management of the Boost The Order (SIBORDER) Information System. IT governance audit is a control mechanism for SIBORDER management. Therefore, before conducting the audit, the auditor needs to make an audit plan to make it easier when allocating resources so that the audit is carried out effectively and efficiently. This research aims to design a SIBORDER governance audit guide using the COBIT 2019 framework. The design begins first, by identifying stakeholder needs, enterprise goals and weighting design factors. The results of stakeholder needs, namely optimizing risk and resources, while enterprise goals, namely EG01, EG05, EG06 and EG13, and the results of domain identification as focus areas, namely BAI 10, DSS 03, DSS 04 and DSS 05. Second, determination of information sources based on the RACI Chart. Third, the creation of an audit worksheet that contains a list of questions for the assessment of the selected domain and the schedule of audit implementation.

Reliability Analysis of Communication Network Service Quality For Internet of Vehicles (IoV)

The development of the Internet of Vehicle (IoV) is overgrowing toward driving comfort, safety, and efficiency. Autopilot or a car without a driver is one implementation of IoT. To run the full function of IoV, a reliable communication network is needed because the risk will be substantial due to the low quality of network infrastructure services. In this research, we will analyze the quality of network infrastructure services. The analysis can be done through two approaches: direct measurement in the field using a GPS Tracker-based system and modeling using the mathematical function of transmit power of mobile communication transmitting devices. The test is carried out in a specific area with a sample of high traffic and low-density areas. This method was chosen to find the right pattern in measuring the quality of communication network services. The tests carried out produce dynamic data on service quality in certain areas. For areas of low density, the service quality tends to be below as well, and many areas without signal are found, while for areas with high density, the quality of service is found to be good, but network overload conditions often occur.

Ultra-low latency networks and bridging the digital divide between Russian Federation regions

Research subject. The article is devoted to the analysis of the 
 apabilities of telecommunication networks with ultra low latency to reduce the digital divide between the regions of the Russian Federation. Method. Systemic and technical and economic analysis. Core results. Determination of communication networks as the basis for reducing the digital divide, establishing the relationship between the Gross Regional Product and the share of employees in the field of informatization and communications, typing of the territories of the Russian Federation according to the possibilities of introducing communication network services with ultra low delays. Practical relevance. The results of the article can be used in the implementation of the digital economy program, scientific and design organizations in the planning and design of communication networks, as well as by universities in the educational process.

Intelligent agent based-Real time monitoring and Evaluation of GSM quality of service

Most Telecommunication companies could not guarantee complete free and quality communication network service. In recent times there had been Undesirable service delivery, this problem is traced to not having free and quality network which had arisen as a result of not monitoring when there is high bit error rate. The problem had been addressed and a solution proffered in this paper by Real time Evaluation and Monitoring of GSM quality of service utilizing intelligent agent device. This was achieved by first determining the channel capacity for GSM quality network, obtaining the bit error rate for the determined capacity, designing an intelligent GSM rule that will monitor and minimize the high bit error rate for quality service and finally designing a Simulink model for real time monitoring and evaluation of GSM quality of service using intelligent agent. The result obtained was10% better than using the conventional methods or techniques like Hieratical, Proportional Integral Derivative (PID). Real time monitoring and Evaluation of GSM quality of service using intelligent agent is preferred to other conventional methods as it can guarantee a perfect and free network in our communication network. Key words : Real time monitoring and evaluation of GSM quality of service, intelligent agent DOI: 10.7176/IKM/11-4-05 Publication date: June 30 th 2021

Joint Dimming Control and Optimal Power Allocation for THO-OFDM Visible Light Communications

Layered or hybrid optical orthogonal frequency division multiplexing (OFDM) has been proposed for use in optical communications due to its excellent spectral and power efficiencies, especially in visible light communications (VLC). However, most of the current works concentrate on transmitter and receiver design as well as the quality of service in communication networks. In this paper, we propose a spectrum-efficient dimmable triple-layer hybrid optical OFDM (DTH-OFDM) scheme to tackle the illumination requirements, considering different practical indoor VLC scenarios from low illumination to high illumination intensities. In the proposed DTH-OFDM scheme, the required dimming level is achieved by jointly adjusting the dimming factors and direct current bias. We investigate the comprehensive performance analysis of the proposed DTH-OFDM in detail, including probability density function, bit error rate (BER), spectral and energy efficiencies. In addition, a joint dimming control and optimal power allocation problem for DTH-OFDM is formulated and solved using convex optimization under the constraints of light emitting diode (LED) nonlinearity, dimming target and communications reliability. Numerical results show that, the proposed DTH-OFDM can offer continuous and arbitrary dimming target with higher spectral efficiency and lower BER compared with its counterparts, as well as an enhanced tolerance to the LED nonlinearity.

Evaluation of Timely Communications Access Methods Using NASA Space Network

There is a growing interest among scientists to coordinate diverse and temporally responsive measurements from multiple space and ground-based observatories in order to obtain greater insights into transient scientific events than would otherwise be possible. Many transient scientific events of interest occur randomly and the scientific value of follow-up observations decays with time. As a result, transient science operations among distributed observatories require timely access to communications network services. This paper develops two complimentary methods to improve users’ network access timeliness using the NASA Space Network (SN). Descriptive models of each method are developed using Systems Modeling Language. Pathfinder experiments are designed and executed. Suitability of the methods is discussed in light of the experimental results. Innovative applications of the methods are presented. This research establishes that the as-built SN systems have adequate capabilities and capacity to support infusion of the methods to current and future users with emergent time-sensitive service needs. The minimum service access wait time was determined to be approximately 10 min and is achievable 84% of the time. An average access wait time of approximately 14 min is expected when SN resource blocking occurs. A roadmap to improve SN access timeliness is presented.

Enhanced Bit Repair IP Fast Reroute Mechanism for Rapid Network Recovery

The massive development of virtualized infrastructures, Internet of Things (IoT), and Wireless Sensor Network (WSN) in recent years has led to an increase in quality requirements for the management and reliability of underlay communication networks. Existing converged networks must therefore guarantee specific quantitative and qualitative parameters of different network communication services to meet customer requirements. However, the quality of the services operated is very negatively affected by an unpredictable failure of a communication link or a network node. In such situations, communication is typically interrupted for a period that is difficult to predict, and which can lead to significant financial losses and other negative effects. Internet Protocol Fast Reroute (IP FRR) technology was developed for these reasons. The paper presents the proposal of the new Enhanced Bit Repair (EB-REP) IP FRR mechanism, which offers significant improvements over its predecessor, the B-REP mechanism. The B-REP offers protection against a single failure and only for selected critical IP flows. The EB-REP provides advanced protection against multiple failures in a protected network domain and the protection can be provided for all network flows. The EB-REP calculates alternative paths in advance based on link metrics, but also allows the construction of alternative paths independently of them. The construction of alternative FRR paths uses a standardized tunneling approach via a unique field Bit-String. Thanks to these features, EB-REP is an advanced contribution to solving IP FRR-related problems, which enables the use of EB-REP in many network deployments, but especially in network solutions that require reliable data transmission.

An advanced iterative model for computing approximated blocking probabilities and measuring the quality of service in optical communication networks

AbstractExisting analytical models (EAMs) are used to find the quality of service of optical networks with wavelength division multiplexing (WDM). However, the convergence of EAMs decreases with an increase in traffic load and the numbers of wavelength (w) channels. EAMs are used to compute approximated numerical values of blocking probabilities (BPs) which are based on an iterative approach. There are cases in EAMs when numerical BP values do not converge to a single point after numerous iterations. In this paper, the converge issues of EAMs have been addressed by considering a recursive approximation based on iterative approach with the convergence criteria which is called an advance approximated BP model (AABPM). The accuracy of the AABPM for WDM optical networks is examined by comparing with an EAM as well as simulation results which shows that AABPM converges to give similar approximated numerical values with less convergence time.

Enterprise architecture for high flexible and agile company in automotive industry

Abstract In the last two decades, the alignment of Information Technologies (IT) and the business needs are continuous requirements. These needs arise from continuous development of a specific solution for a specific problem, without ever worrying if, in the future, such solutions can be integrated to others. In order to line up the IT with the business needs in terms of development of information systems, the use of Enterprise Architecture (EA) approaches start to be explored. The existence of an EA allows the communication infrastructure, applications, security plans, data, network services and other domains to be somehow correlated. The support for EA’s development also benefits the maintenance, since the out of date or inoperability can be avoided. This short paper describes the approach that is being followed to implement an EA on an agile and flexile automotive company, the Bosch Car Multimedia Portugal. In order to achieve this goal, an investigation is being conducted over what has already been done in the company to align with internal guidelines. Later on, a survey and analysis will be conducted on what is already implemented and correspondent business objectives alignment. From the current state of the existing architecture, a plan for EA improvements will be analyzed and proposed.

Quantitative evaluation modeling of mobile Ad Hoc network communication service availability under failure

The availability of network communication services is an important evaluation standard to measure the ability of the network to meet the user’s business needs. The current related research mostly focuses on the evaluation of network reliability, which cannot reflect the logical relationship between failure/maintenance and network performance parameters. Mobile Ad Hoc Network is a multi-hop, centerless and energy-constrained distributed system. Due to the dynamic change of communication environment and the instability of wireless link, Ad Hoc Network is facing great challenges in service availability. In this thesis, a fault-based quantitative evaluation model of traffic availability in Ad Hoc networks is proposed. By studying the multi-state Markov fault model of communication networks and the performance analysis of delay index based on CSMA∖CA protocol, the quantitative evaluation of traffic availability in Ad Hoc networks is realized. And the availability of tactical unit network under different typical network configuration conditions is analyzed through experiments.

Explore the development direction of mobile communication network optimization

Based on the purpose of promoting the better development of mobile communication network, this paper makes a simple discussion on this topic, puts forward optimization methods and technologies, and looks forward to the future development direction. First of all, the development status of mobile communication network is analyzed. Secondly, taking mobile communication 4G network as an example, the key technologies and methods of network optimization are discussed. Finally, combined with the development of mobile communication network, the development direction of network optimization is prospected. People’s requirements for mobile communication network services are constantly improving, and the exploration of network optimization is always on-going. We should focus on the modernization of mobile communication network.

Mobile Phone Signals Interference Cancellation With Improved WLAN Transmission and Thermal Insulation of Buildings Using FSS and RC Film

For macro-femto network, intratier and cross-tier interference (CI) must be canceled to achieve the quality of service, better indoor coverage, and higher data rates. Moreover, for better wireless local area network (WLAN) and mobile communication services while ensuring WLAN security, appropriate temperature in modern buildings with reduced energy cost is also required. To address these issues, RadioClear (RC) film can be pasted on an ordinary glass and installed in different sections to cancel the intratier interference between the femto network as well as CI between the femto and macro network. Moreover, this technique can also ensure enhanced WLAN security and thermal insulation in modern buildings. For WLAN transmission, a fractal dual bandpass frequency selective surface (FSS) designed in the RC sheet can be used to improve the WLAN communication in a situation where two or more than two rooms are served through a single WLAN router. Theoretical results are presented which are further verified through the experimental results.

Fractal teletraffic delay bounds in computer networks

The computation of teletraffic (traffic for short) delay bound is crucial to the guaranteed quality of service in computer communication networks. Traditional non-fractal bounds of traffic delay are loose so that network resources may be over-required for guaranteed quality of service. How to obtain a tighter bound of traffic delay, in fact, is an open problem. This paper gives a solution to that problem by proposing four fractal delay bounds of traffic. We will show that the present fractal delay bounds are tighter than the conventional non-fractal ones.

COMPUTER-AIDED WORKFLOW DESIGNING FOR QOS CONTROL BASED ON ONTOLOGY

Background. The rapid development of technologies in various fields of business, including in telecommunications requires an increasing level of service provision, because the formation of a market for network communication services has increased attention to issues of quality control, both by regulators and by the providers themselves. In order to meet a givenlevel of quality of service, telecommunication operators develop algorithms and solutions for providing quality control services based on various criteria. However, these solutions are not universal for different types of indicators (quantitative, qualitative, etc.) of quality of service.Objective. The paper presents the approach to automating workflows and their components (functional services, connections and rules of interaction) by designing processes based on computer-aided generation of both a set of services that are components of workflows and the sequence of their execution using ontologies. Ontology serves as meta-model of the workflow, services, subject domain and logical rules that establish relationships between functional services.Methods. The implementation of the proposed approach was realized using an ontological modeling, workflow modeling standards and methods of computer-aided designing.Results. An ontological model of service quality indicators was developed, as well as dynamically changing workflow that guarantees the quality of service control universality was designed. For computer-aided workflows generation thesoftware environment has been developed, the performance of which is tested on the example of workflow designing tool IT TODOS for developing and modifying ontologies and generating workflow scheme using BPMN.Conclusions. The proposed approach makes the process of quality of service control more transparent and reduces the involvement of analysts in this process. Such an approach is flexible and universal for usage in any subject domain by uploading relevant data to the registers. It also provides the process of the quality of service control automation and the solution encapsulation enabling employees to use the solution provided at any level without the expert analyst involvement.

Maximizing Revenue Resource Allocation Algorithm for Power Communication Network Service Providers

In order to improve the revenue of power communication network service providers, this paper first constructs a power communication network resource allocation model composed of self-built service providers, third-party service providers and demanders, and models resource allocation problems in power communication networks. Secondly, the Jacobi iteration formula of service capability is derived, and the optimal resource allocation algorithm of service provider is proposed. In the simulation experiment, it is verified that in the competing environment including the self-built service provider and the third-party service provider, the resource allocation of the power communication network has achieved Nash equilibrium in terms of service capability, and when the third-party service provider is introduced, the capital investment of network resources is reduced and the benefits of service providers is increased.

Secure Beamforming in Full-Duplex Two-Way Relay Networks With SWIPT for Multimedia Transmission

With the advent of 5G, multimedia services in wireless communication networks will grow dramatically. So far, many researches have focused on improving security, throughput and channel capacity to support multimedia services. In this paper, a new system model of full-duplex (FD) two-way amplify-and-forward (AF) relay network with simultaneous wireless information and power transfer is presented, where two FD legitimate nodes with two single-antenna communicate with each other via energy-constrained AF relay with multiple antennas, and there is a half-duplex node with single antenna who intends to eavesdrop. This paper targets to maximize the secrecy sum rate of the system by designing the transmit beamforming vector of relay under power constraint and zero-forcing constraint, where two energy harvesting protocols, namely, power splitting and time switching are considered. However the maximization problem is a non-convex optimization, and it is very complex to solve. Therefore a linear method is used to find the lower bound of the secrecy sum rate and the non-convex problem is transformed into a convex optimization problem. After that, an iterative algorithm based on difference-of-convex programming is proposed to solve this convex optimization problem. The simulation results show the good convergence of the proposed iterative algorithm and also the superiority of secrecy sum rate of our proposed scheme compared with two traditional schemes.

Intellectual method of operational evaluation of the network element state to ensure the quality of services in corporate multiservice communications networks

The work proposes and investigates an intelligent method and algorithms for on-line assessment of the state of network elements to ensure the required quality indicators of provided communication services in corporate high-speed multiservice communication networks. The developed method and algorithms operate in a mode close to real time. One of the features of corporate multiservice communication networks is the high dynamics of changes in their state. The main task of the automated control system, which is an integral part of the corporate multiservice communication network, is to ensure the specified quality of the provided communication services to the consumer. Thus, the relevance of the research presented in the work is due to the fact that most of the management processes in corporate high-speed multiservice communication networks must be implemented in a mode close to real time with a given quality. The basis of the method for operational assessment of the state of network elements is the concept of creating and using intelligent agents. In the proposed approach, intelligent agents are created as hierarchical fuzzy situational networks, in which control solutions, in contrast to known methods based on the use of reference situations, are applied based on solving a hierarchical set of optimization problems using fuzzy mathematical programming methods. The main paradigm of their functioning is “situation -action”.