Development Of Mobile Communication Systems Research Articles

Wireless mobile communication systems: current status, application fields and challenges

The article analyzes the current state of mobile communication systems, and highlights development perspectives from the past to the present, vulnerabilities in security systems and application fields. At the same time, it provides information about the possible threats that may occur during an attack on the data entering the network from intelligent devices. For many years, numerous research centers have been conducting intensive research on the direct communication between various devices through mobile communication systems. These studies are realized to manage mobile communication systems and computers, mobile devices and other equipment. Therefore, special attention is paid to the development of mobile communication systems both in Azerbaijan and in the world, and it is considered one of the most promising fields of application of information technologies. The article also provides information about the fifth-generation mobile communication system, which is a new generation of wireless network technology for digital mobile networks. The results of research conducted on the fifth-generation mobile communication system in the world and the technological innovations to be brought to the healthcare and energy fields, agriculture, smart cities, smart villages and transport sectors are reported.

5G mobile communication systems application in smart cities

5G, the fifth generation of mobile communication systems, is expected to bring about a revolution in the world of wireless communication. Its key features include high data transmit rates, low latency, and high system capacity, which make it ideal for supporting a range of advanced technologies and applications. One of the most promising areas of application for 5G is in the development of smart cities. In this article, we provide an overview of the development of mobile communication systems from 1G to 5G, highlighting the key features and benefits of each generation. We also explore the specific features and applications of 5G that make it an ideal technology for building smart cities, including smart driving, smart healthcare, smart energy, and more. Additionally, we explain why 5G is critical for meeting the requirements of smart cities, such as the need for high-speed and reliable connectivity. Finally, we discuss the importance of 5G in constructing smart cities in the future, and the potential benefits that it could bring to society as a whole. With the potential to transform the way we live, work, and interact with our environment, 5G is set to play a critical role in shaping the cities of tomorrow.

Investigation and Analysis of the Status Quo of Sports Dance Based on Mobile Communication

Dance sports is an emerging sport that can not only exercise the body but also please the mind and body. Under the theoretical guidance of “lifelong sports” and “health first,” in recent years, sports dance courses have not only been introduced in ordinary colleges and universities in China, but the overall quality development of students has been greatly improved, and the call for quality education for the whole people has also been answered. In recent years, the rapid development of mobile communication systems around the world has greatly enhanced the communication services of developed and developing countries to various places. This paper studies the current situation of sports dance based on mobile communication and links the century-old sports dance project with modern mobile communication to promote Chinese sports dance education and summarize more practical experience and methods with reference value. This paper introduces the development of mobile communication technology in detail, focusing on improving the user experience and service quality of sports dance, and introducing the mobile communication network into the geographic grid to solve the problem of the association between the data attributes of the base station and the geographic space. In addition, this paper systematically investigates the current situation of sports dance in A district and designs a targeted questionnaire. On the basis of the analysis of the current situation, corresponding countermeasures and measures are put forward, aiming to provide reference for the development of sports dance and make a modest contribution to promoting the widespread development of national fitness movements and promoting social harmony and civilization progress in the region. The results of the survey show that the residents’ sports dance programs have obvious age characteristics, and 77% of the students are 10-20 years old and over 50 years old. In the investigation of the main restrictive factors of sports dance development, sports dance coaches and students both put the restrictive factor of the teaching staff in the first place.

The Development of Mobile Communication System and Human Health Risks

The Development of Mobile Communication System and Human Health Risks

Development of mobile communication systems for high-speed railway

Development of high-speed railways set up challenges for new communication technologies. With the increase in speed, new requirements for communication systems have emerged that HSR requires greater reliability, capacity and shorter response time for efficient and safe operations. Mobile communication systems are crucial for the competitiveness of the railway industry and therefore have become one of the priorities addressed by the participants in the railway system to take advantage of technological opportunities to improve operational processes and the quality of provided transport services. The European Rail Traffic Management System (ERTMS) uses the Global System for Mobile Communications for Railways (GSM-R) for voice and data communication to communicate between trains and control centers. The International Railway Union is exploring new ways of communicating for high-speed railways because as speed increases this system becomes unreliable in information transmission. This paperwork presents an analysis of the evolution of communications on European railways since the usage of GSM-R. In addition, an overview of the various alternative solutions proposed during the time (LTE-R, Future Railway Mobile Communication System) as possible successors to GSM-R technology is given.

Relevance of technical and hygienic prognosis of the impact of radio frequency electromagnetic radiation on the population in the digital economy

The functioning of the digital economy is accompanied by the intensive development of mobile communication system, the introduction of numerous wireless devices for various purposes that create radio frequency electromagnetic radiation in the human environment. It is important to solve the problems of ensuring electromagnetic safety of the population. The aim of the study is to substantiate the need for a technical and hygienic prognosis of the impact of radio frequency of electromagnetic radiation on the population in the digital economy in order to develop science - based recommendations for the prevention of the negative impact of EMF on the health of the population. The significance of forecasting is considered on the example of the development of a mobile radio communication system. The study included an analysis of the national program "Digital economy of the Russian Federation", "Concepts for creating and developing 5G/IMT-2020 networks in the Russian Federation", and scientific publications ELIBRARY.RU, PubMed Central Internet information platform, EMF-Portal RWTH Aachen University Internet platform, PubMed Central Internet resources and others. The rationale for the need for continuous forecasting of the impact of radio frequency radiation on the population and the structure of the forecast are presented. The article shows the importance of forecasting for the timely development of legal acts, methodological documents, technical and organizational measures to protect the population from the effects of electromagnetic fields and the need for a systematic approach to ensuring the electromagnetic safety of the population. In the context of the development of the digital economy, it is extremely relevant to develop a technical and hygienic forecast of the impact of radio frequency electromagnetic radiation on the population and scientific justification of measures to protect the population from EMF. When forming a forecast, it is necessary to apply a systematic approach to coordinate the entire range of measures to ensure electromagnetic safety of the population. The development of forecasts requires strong interdepartmental and interdisciplinary interaction. Research and scientific development in the field of electromagnetic safety of the population should have state funding. The "electromagnetic security" direction should be included in the national program "Digital economy of the Russian Federation".

Mutual coupling reduction of multiple antenna systems

A multi-band multi-antenna system has become an important trend in the development of mobile communication systems. However, strong mutual coupling tends to occur between antenna elements with a small space, distorting array antennas’ performance. Therefore, in the multiple-input multiple-output (MIMO) antenna system, high isolation based on miniaturization of the antenna array has been pursued. We study in depth the methods of decoupling between antenna elements. Reasons for the existence of mutual coupling and advantages of mutual coupling reduction are analyzed. Then the decoupling methods proposed in recent works are compared and analyzed. Finally, we propose a metasurface consisting of double-layer short wires, which can be applied to improve the port isolation of antennas arranged along the H-plane and E-plane. Results show that the proposed metasurface has good decoupling effect on a closely placed antenna array.

5G evolution promoting innovation of antenna systems

We introduce the basic concept, background, and development of mobile communication systems from the first generation (1G) to the fifth generation (5G) including their antenna systems. We also describe the requirements for 5G networking and optimization of antenna systems, and present the basic principle of three-dimensional array antennas. Weight optimization methods of massive multiple-input multiple-output (MIMO) antennas are proposed and verified. Finally, several ideas are given to solve the problem of power consumption of 5G antenna systems.

Rationalization of the constructive form of towers with prestressed cables

Relevance. One of the main directions of development of mobile communication systems, radio engineering and telecommunication systems is the improvement of the structural form of the bearing supports, which will solve a number of practical tasks: to increase the coverage area, to ensure higher rates of data transmission speed and to ensure stable operation in an increasing number of users. These circumstances justify the relevance of research in this direction. Aims of research. Optimization of design solutions using parallel puffs, ensuring the possibility of erection and safe operation during the entire service life, which ensures that the requirements for strength, stability and deformations for such structures are met with minimal material consumption. Methods. For calculations, finite element methods are used for mathematical modeling using software and computing systems. To create linear models for numerical experiments, the method of mathematical planning of experiments was used. Results. The work of the towers of the proposed constructive solution is considered as supports for the placement of equipment of cellular operators using the example of a 42-meter tower. The method of mathematical planning of experiments was used to create a model line for numerical experiments. To establish the basic characteristics of the stress-strain state of the structures of the supports, a number of models were created and calculated in software packages, the basis of which is the finite element method. A comparative analysis of the effort in the delays determined by analytical calculation and the finite element method is performed. The analysis of changes in the stress-strain state of the towers from the influence of influencing factors, such as wind and icy-wind loads, the angle of deflection on the lower tier of the tower. By the criterion of minimum metal consumption and manufacturability of the construction of towers, rational overall dimensions of the tower were determined. The options for constructing the main junctions of the elements of the tower are proposed.

Fog Computing Enabled Future Mobile Communication Networks: A Convergence of Communication and Computing

The convergence of communication and computing (COM2P) has been taken as a promising solution for the sustainable development of mobile communication systems. The introduction of fog computing in future mobile networks makes COM2P possible. This article provides an overview on fog computing enabled mobile communication networks (FogMNW), including network architecture, system capacity and resource management. First, this article analyzes the heterogeneity of FogMNW with both advanced communication techniques and fog computing. Then a heterogeneous communication and hierarchical fog computing network architecture is proposed. With both communication and computing resources, FogMNW is enabled to achieve much higher capacity than conventional communication networks. This has been well demonstrated by the coded multicast scheme. Furthermore, a systematic management of communication and computing resources is necessary for FogMNW. By exploiting the communication load diversity in N cells, a communication load aware CLA scheme can achieve much higher computing resource efficiency than comparing schemes. The performance gap increases with N, and CLA can improve efficiency by more than 100 percent when there are 14 cells.

ANALISIS PROPAGASI PADA KAWASAN KAMPUS UNIVERSITAS NUSA CENDANA PENFUI KUPANG

In a telecommunications system, a radio propagation model is needed to do a design, construction, and development of mobile communication systems. Propagation models commonly used are the Okumura-Hatta model and the COST model 231. These models are used to determine an accurate propagation model in a particular area. This study aims to obtain a propagation model on the environmental conditions of dry-land such as the University of Nusa Cendana areas by using Okumura-Hata path loss modeling and COST-231. In this study, the acceptance test drive was carried out at frequencies of 900 Mhz, 1800 Mhz and 1900 MHz using the G-NetTrack application on Telkomsel BTS in the University of Nusa Cendana area with Latitude coordinates -10.156738 and Longitude 123.668422 as well as observing frequencies using Spectrum Analyzer to be used as primary data. The next step is to calculate the received power data as secondary data using the Okumura-Hata path loss calculation and COST-231. Based on primary and secondary data an analysis of which propagation model matches the measurements in the field is carried out. From the propagation analysis, it can be concluded that the propagation model that suits the conditions on the campus area is the Okumura-Hatta model.

Versatile mobile communications simulation: the Vienna 5G Link Level Simulator

Research and development of mobile communications systems require a detailed analysis and evaluation of novel technologies to further enhance spectral efficiency, connectivity and reliability. Due to the exponentially increasing demand of mobile broadband data rates and challenging requirements for latency and reliability, mobile communications specifications become increasingly complex. For this reason, analytic analysis as well as measurement-based investigations of link-level methods soon encounter feasibility limitations. Therefore, computer-aided numeric simulation is an important tool for investigation of wireless communications standards and is indispensable for analysis and development of future technologies. In this contribution, we introduce the Vienna 5G Link Level Simulator, a Matlab-based link-level simulation tool that facilitates research and development in mobile communications. Our simulator enables standard compliant setups according to 4G LTE, 5G NR and even beyond, making it a very flexible simulation tool. Offered under an academic use license free of charge to fellow researchers, it considerably enhances reproducibility in wireless communications research.

Time synchronization in communication networks based on the Beidou foundation enhancement system

Communication networks rely on time synchronization information generated by base station equipment (either the Global Navigation Satellite System receiver or rubidium atomic clock) to enable wireless networking and communications. Meanwhile, the time synchronization among base stations depends on the Network Time Protocol. With the development of mobile communication systems, the corresponding time synchronization accuracy has increased as well. In this case, the use of sparsely distributed-high-precision synchronization points to synchronize time for an entire network with high precision is a key problem and is the foundation of the enhanced network communication. The current receiver equipment for China’s digital synchronous network typically includes dedicated multi-channel GPS receivers for communication; however, with the development of GPS by the USA, network security has been destabilized and reliability is low. Nonetheless, network time synchronization based on Beidou satellite navigation system timing devices is an inevitable development trend for China’s digital communications network with the establishment of the independently developed BDS, especially the implementation and improvement of the Beidou foundation enhancement system.

A survey: Several technologies of non-orthogonal transmission for 5G

One key advantage of 4G OFDM system is the relatively simple receiver implementation due to the orthogonal resource allocation. However, from sum-capacity and spectral efficiency points of view, orthogonal systems are never the achieving schemes. With the rapid development of mobile communication systems, a novel concept of non-orthogonal transmission for 5G mobile communications has attracted researches all around the world. In this trend, many new multiple access schemes and waveform modulation technologies were proposed. In this paper, some promising ones of them were discussed which include Non-orthogonal Multiple Access (NOMA), Sparse Code Multiple Access (SCMA), Multi-user Shared Access (MUSA), Pattern Division Multiple Access (PDMA) and some main new waveforms including Filter-bank based Multicarrier (FBMC), Universal Filtered Multi-Carrier (UFMC), Generalized Frequency Division Multiplexing (GFDM). By analyzing and comparing features of these technologies, a research direction of guiding on future 5G multiple access and waveform are given.

THE ANALYSIS OF KEY TECHNOLOGIES FOR MOBILITY MANAGEMENT IN WIRELESS COMMUNICATIONS

Development of mobile communication systems from analogue connection 1G to 4G high speed broadband was investigated. increasing achievements in research and development of wireless communication technologies, the increasing capabilities of electronic devices contribute to the spread of services for mobile users was determined. The concept of 4G and the comparative analysis of the main approaches to the interaction of different technologies in 4G heterogeneous environment were determined. Presented and discussed the different ways mobile management and the basic procedure of data transmission. It is determined that no technology can provide both a high level of bandwidth, low latency, high mobility and wide range of services to a large number of users.

The Dipole Antenna with Photonic Crystal Structure Used for Mobile Communication

The antenna design and its manufacturing technology is one of the gordian technique in mobile communication system, the performance of antenna influences the performance of the mobile communication system directly. To mobile communication system, the study of antenna has important significance. The development of mobile communication system brings a new request to the antennas design. This paper start from dipole antenna and the structural theory of photonic crystal, bat around the superiority of the two, and make a combination, design a dipole antenna with photonic crystal structure which can work in 2GHz frequency range, small size, return loss in low and bandwidth is suitable for CDMA2000 mobile communication system, and we simulate and test the performance of this antenna, discuss how the parametric variation will influence the performance of antenna.

Extending the engineering trade-off analysis by integrating user preferences in conjoint analysis

The ongoing technical improvements in architecture design with improved features of mobile or smartphones do not automatically guarantee user acceptance, because technical and commercial aspects primarily drive the development of mobile communication systems and devices. Especially in early stages of technology development, user preferences and values are not adequately considered, which might even have a negative impact on acceptance issues. The aim of this study was the implementation of a quantified understanding of user needs in terms of values into the system design process of cell-phone processors. Moreover, we aimed for an extension of the engineering’s trade-off analysis by using conjoint analysis in order to investigate trade-offs between specific device characteristics. Finally, our aim was the evaluation of empirically based user-oriented research methods.Results of the first study revealed that battery life, speech quality, signal quality and data-transmission rate are the most important device characteristics. Results from conjoint analysis indicated a clear trade-off between battery life and the three other characteristics. Moreover, this research demonstrated that technology acceptance research benefits considerably from an interdisciplinary and multi-method approach. Besides, implementing the users’ preferences into early stages of the product development process offers several advantages concerning effectiveness as well as economic aspects of development.

Design of Mobile Phone Networks and Map-matching Navigation System

Mobile phone location technique is emerged with the development of mobile communication system, and it is a new location technique. Its strong points include low costs and operation costs, easily to carry over, simple system maintenance, and realization of positioning both initiative and passive. The mobile phone location technique is improved with the development of mobile communication technique, and its setting accuracy would also be increasingly higher. Along with the rapid development of computer hardware and software technique, GIS technology entered different fields of study, and the map matching system based on GIS system technique has also been applied in different areas. In this paper, it efficiently combined mobile phone net as well as map-matching, and designed a reasonable algorithm.

이동전화단말기 속성이 고객만족에 미치는 영향에 관한 실증적 연구

Last rapidly changing mobile handset market in many industries, as well as market conditions affect the prevalence of various content types of consumer spending in general is affecting. Changes in mobile handset market by separating the various consumer-tier analysis, or differentiated in consumers` purchasing behavior are being reflected in the property analysis and overview of customer satisfaction can be assessed by measuring. These mobile devices and the purchase of the devices to investigate the tendency to analyze and weigh the various content industries, you can see how important one can be considered. The development of mobile communication systems and wireless internet and multimedia applications can lead the industry accelerated. In this study, tried to investigate that the mobile communication systems in consideration of the special form of mobile handsets, and customer satisfaction of mobile phone handsets, and the relationship between customer loyalty. Outcome of this study, the mobile properties and the mobile handset brand, price, design and related details to be statistically significant variables were analyzed. In this study, the characteristics of future mobile handset market with a wide range of content-based guidelines for the development of the industry is expected to be able to provide.

Beyond 3G: vision, requirements, and enabling technologies

This article introduces the vision and requirements for future development of mobile communications systems, and discusses several key enabling technologies such as modulation and multiple access schemes, multiple antenna techniques, and an IP-based network, considered important to realize this vision in real-world systems.