METHOD ENSURING ELECTROMAGNETIC COMPATIBILITY WITH COGNITIVE FREQUENCY RESOURCE ALLOCATION IN A MOBILE COMMUNICATION SYSTEM
Journal Title: Вісник Національного університету "Львівська політехніка", серія "Радіоелектроніка та телекомунікації" - Year 2017, Vol 874, Issue 2017
Abstract
Individual elements of systems and networks using radio links, to interfere with other network elements, and in turn, they are subject to interference effects. Designed by many methods, techniques, theoretical studies devoted to improving the electromagnetic environment in radio, the problem of electromagnetic compatibility. We can assume that in a hospital, especially when considering dueling (transmitter – receiver) electromagnetic compatibility problems at the design stage is almost solved. The situation itself and the electromagnetic environment complicates the fact that this situation is often made various random factors that bear unpredictable character. Under these conditions in advance to calculate the electromagnetic environment and to solve the problem of electromagnetic compatibility with sufficient accuracy is not always possible, and often impossible due to a priori uncertainties. With the advent of mobile network signal and interference environment has become much more complicated. An increasing number of radio electronic devices for different purposes lead to the formation of the plural character of the electromagnetic interactions between them. At the same time it becomes even more fundamental shortage of frequency resources, exacerbated by the problem of electromagnetic compatibility. Find ways to solve this problem, you can use cognitive frequency resource allocation with frequency reuse. Cognitive system with the allocation of resources, including the frequency and must have selfmechanisms with different levels of ability to adapt to a changing radio environment. At the same time self-arrangements based on the principles of learning and artificial intelligence.26 When the cognitive spectrum distribution network, each subscriber station must continuously be monitored spectrum for the presence of free channels. The analysis results are transmitted base station, and it takes the final decision on channel availability. When deciding the base station based on results of spectrum analysis, the location information and the auxiliary information. An algorithm for solving the problem of optimizing the allocation of frequency resource for mobile networks. The algorithm is based on local optimization method – one of the approximate methods of discrete programming. In this case, local optimality condition is that the subscriber station is assigned the next operating frequency to be closest to the assigned frequency in the previous step, but it must be carried out electromagnetic compatibility conditions.
Authors and Affiliations
V. Popovski, A. Kolyadenko
Keywords
Related Articles
- EP ID EP455515
- DOI -
- Views 187
- Downloads 0
MODELING OF CURVILINEAR FILAMENT STRUCTURE IN THE WAVEGUIDE
Well known current filament modeling method is frequently for electrodynamic structures analysis in free space and in waveguide used. In both cases the electrodynamic analyse principles are the same. The current filament...
SIMULATION MACROMODEL OF SUBSCRIBER’S BEHAVIOR IN CELLULAR COMMUNICATION NETWORK
The paper proposes the simulation macro model of subscribers’ behavior in cellular communications network, considering its structure, peculiarities of the subscribers’ movement and their activity, including the requests...
EVALUATION OF NETWORK PARAMETERS AT THE STAGE OF OPTICAL TRANSPORT SYSTEM DESIGNING
Since the primary network is nothing more than a set of channels, behavior and standards do not go beyond the network layer protocols, which includes a description of channels and methods of switching. Emerging of new so...
RECTILLINEAR ARRAYS AND THEIR COMBINED RADIATION PATTERNS
A disadvantage of simple antenna is they do not always perform to specified requirements, such as the required width of the main lobe of radiation pattern (RP). In response, we often utilize straight array (SA) containin...
MOBILE INFORMATION TECHNOLOGIES OF NAVIGATION OF A USER IN COMPLEX INDOOR ENVIRONMENT
The article depicts the indoors positioning technology and user mobile positioning devices. It describes the possibilities of computer technology of indoors positioning of the device when navigating the user through the...