scholarly journals Analysis of mathematical models of mobility of communication systems of special purpose radio communication systems

2021 ◽  
Vol 4 (2(60)) ◽  
pp. 39-44
Author(s):  
Oleksii Nalapko ◽  
Oleg Sova ◽  
Andrii Shyshatskyi ◽  
Anatolii Hasan ◽  
Vira Velychko ◽  
...  
Keyword(s):  
Wireless Networks ◽  
Mathematical Models ◽  
Communication Systems ◽  
Radio Networks ◽  
Mobile Radio ◽  
Mobility Models ◽  
Radio Communication ◽  
Deterministic Models ◽  
Advantages And Disadvantages ◽  
Individual Nodes

The object of research is the military radio communication system. One of the problems in improving the effectiveness of military radio communication systems is the correct description of the movement process in them. Efficient routing protocols are only possible if reliable information on network topology for network nodes is available. Thus, with this information, packets can be forwarded correctly between the sender and the recipient. Given that the mobility of individual nodes is insignificant in special wireless networks, nodes in the network show the mobility properties of a group of nodes. This observation is directly related to the very existence of military wireless networks with the ability to organize themselves, that is, to support group cooperation and group activities. In this work the problem of analysis (decomposition) of the mobility models of military radio communication networks with the possibility of self-organization is solved. The classification of mobility patterns, the description of individual mobility models and the analysis of various aspects currently available, as well as those properties lacking in the attempt to simulate the movement of individual nodes, have been carried out. During the research, the analysis of random, semi-deterministic and deterministic models was carried out. The advantages and disadvantages of the above models have been identified. In the course of the research, the authors of the work used the main principles of the theory of mass service, the theory of automation, the theory of complex technical systems, as well as general scientific methods of knowledge, namely analysis and synthesis. The research results will be useful in: ‒ synthesis of mathematical models of node mobility; ‒ evaluation of the effectiveness of the science-based tool for assessing the mobility of nodes; ‒ validation of recommendations to improve the efficiency of mobile radio networks; ‒ analysis of the radio-electronic situation during the conduct of military operations (operations); ‒ creating advanced technologies to improve the efficiency of mobile radio networks.

scholarly journals Development of a simulation model for a special purpose mobile radio network capable of self-organization

2021 ◽  
Vol 5 (2(61)) ◽  
pp. 49-54
Author(s):  
Oleg Sova ◽  
Andrii Shyshatskyi ◽  
Oleksii Nalapko ◽  
Oleksandr Trotsko ◽  
Nadiia Protas ◽  
...  
Keyword(s):  
Simulation Model ◽  
Communication Systems ◽  
Radio Networks ◽  
Mobile Radio ◽  
Routing Algorithms ◽  
Self Organization ◽  
Radio Network ◽  
Radio Communication ◽  
Mobile Radio Network ◽  
The Impact

The object of research is the military radio communication system. Effective operation of routing protocols is possible only if there is reliable information about the network topology for each of the network nodes. Construction of special purpose radio networks with the possibility of self-organization is possible only in the presence of adequate and reliable models of their work in different applications and the impact nature. It necessitates the development of new and adequate algorithms (methods, techniques) for modeling routing algorithms in special purpose radio networks with the possibility of self-organization. This work solves the problem of developing a simulation model of a mobile radio network for special purposes with the possibility of self-organization. In the course of the research, the authors used the main provisions of the queuing theory, the theory of automation, the theory of complex technical systems and general scientific methods of cognition, namely analysis and synthesis. This simulation model was developed to assess the effectiveness and adequacy of the developed scientific and methodological apparatus for routing management in special purpose radio networks with the possibility of self-organization. The research results will be useful in: ‒ development of new routing algorithms; ‒ substantiation of recommendations for improving the efficiency of the route selection process in networks with the possibility of self-organization; ‒ analysis of the electronic situation during hostilities (operations); ‒ while creating promising technologies to increase the efficiency of mobile radio networks; ‒ assessment of adequacy, reliability, sensitivity of routing algorithms; ‒ development of new and improvement of existing simulation routing models. Areas of further research will focus on the development of a methodology for the operational management of interference protection of intelligent military radio communication systems.

Exploring the Open Problems and Future Trends Concerning Handovers in Heterogeneous Wireless Networks: A Review

2014 ◽  
Vol 70 (3) ◽  
Author(s):  
Bushra Naeem ◽  
Uche A. K. Chude-Okonkwo ◽  
Razali Ngah ◽  
Siti Z. Mohd Hashim ◽  
Wajahat Maqbool ◽  
...  
Keyword(s):  
Wireless Networks ◽  
Communication Systems ◽  
New Technologies ◽  
Heterogeneous Wireless Networks ◽  
Future Trends ◽  
Large Area ◽  
Open Problems ◽  
Advantages And Disadvantages ◽  
Seamless Connectivity ◽  
Vertical Handovers

The advancements in the telecoms industry have led to the emergence of many new technologies to meet communication requirements worldwide. Consumers have largely been using GSM, CDMA and WiFi. New developments have given birth to more robust communication systems including WiMax and LTE. Lay users are not aware of the technicalities, advantages and disadvantages of these technologies. Therefore, there is a state of great confusion among the users of this generation as to which technology is the best for them to use. Each of these technologies has pros and cons over one another. For example, LTE covers a large area and offers the highest speed, but the user has to pay for it; however, WiFi covers only hotspots but the use is free. Future heterogeneous networks (HetNets) will enable users to achieve seamless connectivity through vertical handovers while providing them the beneficial features of each technology. For HetNets many issues still need to be addressed. This paper explores some of the open problems and future trends related to the handovers in heterogeneous wireless networks. The dynamics with respect to handovers and the network load of cellular architecture in the coming era in the field of wireless communications are also presented. In addition, first a foundation is laid on the IEEE media independent handover and its importance and then the problem of load balancing and its impact on the realization of future HetNets is explained. Finally, an important problem during vertical handovers, known as the ping-pong effect is explained. The open problems for researchers have been identified for the aforementioned issues.

Linear predictor based method for estimating Doppler in mobile radio communication systems

2000 ◽  
Vol 36 (12) ◽  
pp. 1066 ◽  
Author(s):  
C.C. Tsimenidis ◽  
O.R. Hinton ◽  
B.S. Sharif ◽  
A.E. Adams
Keyword(s):  
Communication Systems ◽  
Mobile Radio ◽  
Radio Communication ◽  
Linear Predictor

scholarly journals A New Hybrid Diversity Combining Scheme for Mobile Radio Communication Systems over Nakagami Fading Chanel

2020 ◽  
Vol 12 (3) ◽  
pp. 1-15
Author(s):  
Akinyinka Olukunle Akande ◽  
Onyebuchi Chikezie Nosiri ◽  
Nnaemeka Chiemezie Onuekwusi ◽  
Emmanuel Uchenna Ekwueme
Keyword(s):  
Communication Systems ◽  
Mobile Radio ◽  
Nakagami Fading ◽  
Diversity Combining ◽  
Radio Communication ◽  
Hybrid Diversity

scholarly journals Complex methodology of parameters management of military radio networks in the conditions of uncertainty of the radioelectronic situation

2020 ◽  
pp. 73-85
Author(s):  
А.В. Шишацький ◽  
Ю.В. Журавський ◽  
В.М. Остапчук ◽  
М.В. Сова ◽  
О.Д. Гаращук ◽  
...  
Keyword(s):  
Communication Systems ◽  
Open Systems ◽  
Radio Networks ◽  
Open Architecture ◽  
Reference Network ◽  
Radio Communication ◽  
Network Resources ◽  
Radio Communications ◽  
Electronic Environment ◽  
Radio Systems

The experience of the Joint Forces operation (Anti-terrorist operation in Donetsk and Luhansk oblasts) shows that the current order of management of military radio communication systems does not always meet the modern requirements for them. The classic centralized approach to the management of channel and network resources of military radio systems does not quite meet modern requirements, so the authors of this article proposed to take mobile self-organizing networks as a basic principle of construction. The authors propose a comprehensive method of managing the parameters of military radio networks in conditions of uncertainty of the electronic environment, the essence of which is to ensure the maintenance of the specified values of the performance of military radio communication systems at the appropriate level. The article is based on the control principle, which is described in the reference network model of open systems interaction, but with some additions and changes. This approach generally allows for end-to-end management of channel and network resources of military radio systems in a complex electronic environment. In the article, the device of fuzzy logic, the theory of electronic suppression, neural networks, the theory of noise protection, the theory of antennas, noise-resistant coding are used. The proposed complex methodology should be used in the development of software for modules (units) for the assessment of advanced radio communications, based on open architecture interfaces version SCA 2.2, which will: use effective signal-code structures to ensure noise immunity of channels; to ensure efficient use of the radio frequency resource of programmable radio communication means; increase the speed of evaluation of communication channels; reduce the use of computing resources of radio communications with programmable architecture.

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