{"id":11303,"date":"2022-03-19T01:10:19","date_gmt":"2022-03-18T23:10:19","guid":{"rendered":"http:\/\/journals.khnu.km.ua\/vestnik\/?p=11303"},"modified":"2022-04-14T12:07:48","modified_gmt":"2022-04-14T09:07:48","slug":"suchasni-radiotehnologiyi-dlya-zvyazku-m2m","status":"publish","type":"post","link":"https:\/\/journals.khnu.km.ua\/vestnik\/?p=11303","title":{"rendered":"\u0421\u0443\u0447\u0430\u0441\u043d\u0456 \u0440\u0430\u0434\u0456\u043e\u0442\u0435\u0445\u043d\u043e\u043b\u043e\u0433\u0456\u0457 \u0434\u043b\u044f \u0437\u0432’\u044f\u0437\u043a\u0443 m2m"},"content":{"rendered":"

<\/p>\n

\u0421\u0423\u0427\u0410\u0421\u041d\u0406 \u0420\u0410\u0414\u0406\u041e\u0422\u0415\u0425\u041d\u041e\u041b\u041e\u0413\u0406\u0407 \u0414\u041b\u042f \u0417\u0412’\u042f\u0417\u041a\u0423 M2M<\/p>\n

MODERN RADIO TECHNOLOGIES FOR M2M COMMUNICATION<\/p>\n

\u0421\u0442\u043e\u0440\u0456\u043d\u043a\u0438: 225-228. \u041d\u043e\u043c\u0435\u0440: \u21166, 2021 (303)<\/strong> \"\"<\/a>
\n\u0410\u0432\u0442\u043e\u0440\u0438<\/strong>:
\n\u041c\u0410\u041a\u0410\u0420\u0418\u0428\u041a\u0406\u041d \u0414. \u0410., \u041b\u042e\u0411\u0410\u0420\u0421\u042c\u041a\u0418\u0419 \u041c. \u0412., \u041c\u0406\u0428\u0410\u041d \u0412. \u0412.
\n\u0425\u043c\u0435\u043b\u044c\u043d\u0438\u0446\u044c\u043a\u0438\u0439 \u043d\u0430\u0446\u0456\u043e\u043d\u0430\u043b\u044c\u043d\u0438\u0439 \u0443\u043d\u0456\u0432\u0435\u0440\u0441\u0438\u0442\u0435\u0442
\nDenys MAKARISHKIN, M. LYUBARSKY, V. MISHAN
\nKhmelnytskyi National University
\nDOI:<\/strong> https:\/\/www.doi.org\/10.31891\/2307-5732-2021-303-6-225-228<\/a>
\n\u0420\u0435\u0446\u0435\u043d\u0437\u0456\u044f\/Peer review : <\/strong>07.12.2021 \u0440.
\n\u041d\u0430\u0434\u0440\u0443\u043a\u043e\u0432\u0430\u043d\u0430<\/strong>\/<\/strong>Printed<\/strong> :<\/strong> 30.12.2021 \u0440.<\/p>\n

\u0410\u043d\u043e\u0442\u0430\u0446\u0456\u044f \u043c\u043e\u0432\u043e\u044e \u043e\u0440\u0438\u0433\u0456\u043d\u0430\u043b\u0443<\/strong><\/p>\n

\u0421\u0438\u0441\u0442\u0435\u043c\u0438 \u0437\u0432\u2019\u044f\u0437\u043a\u0443 \u043f\u2019\u044f\u0442\u043e\u0433\u043e \u043f\u043e\u043a\u043e\u043b\u0456\u043d\u043d\u044f (5G) \u0437\u0430\u0431\u0435\u0437\u043f\u0435\u0447\u0443\u044e\u0442\u044c \u0437\u0431\u0456\u043b\u044c\u0448\u0435\u043d\u043d\u044f \u0448\u0432\u0438\u0434\u043a\u043e\u0441\u0442\u0456 \u043f\u0435\u0440\u0435\u0434\u0430\u0447\u0456 \u0434\u0430\u043d\u0438\u0445, \u0432\u0438\u043a\u043e\u0440\u0438\u0441\u0442\u0430\u043d\u043d\u044f \u043d\u0430\u0434\u043d\u0430\u0434\u0456\u0439\u043d\u043e\u0433\u043e \u0437\u0432\u2019\u044f\u0437\u043a\u0443 \u0456\u0437 \u043c\u0430\u043b\u043e\u044e \u0437\u0430\u0442\u0440\u0438\u043c\u043a\u043e\u044e (URLLC), \u043c\u0430\u044e\u0442\u044c \u0432\u0438\u0441\u043e\u043a\u0443 \u0441\u043f\u0435\u043a\u0442\u0440\u0430\u043b\u044c\u043d\u0443 \u0435\u0444\u0435\u043a\u0442\u0438\u0432\u043d\u0456\u0441\u0442\u044c, \u0448\u0438\u0440\u043e\u043a\u0456 \u043c\u043e\u0436\u043b\u0438\u0432\u043e\u0441\u0442\u0456 \u043f\u0456\u0434\u043a\u043b\u044e\u0447\u0435\u043d\u043d\u044f \u0442\u0430 \u043f\u0456\u0434\u0432\u0438\u0449\u0435\u043d\u0443 \u0435\u043d\u0435\u0440\u0433\u043e\u0435\u0444\u0435\u043a\u0442\u0438\u0432\u043d\u0456\u0441\u0442\u044c. \u041c\u0443\u043b\u044c\u0442\u0438\u043f\u043b\u0435\u043a\u0441\u0443\u0432\u0430\u043d\u043d\u044f \u0437 \u043e\u0440\u0442\u043e\u0433\u043e\u043d\u0430\u043b\u044c\u043d\u0438\u043c \u0447\u0430\u0441\u0442\u043e\u0442\u043d\u0438\u043c \u043f\u043e\u0434\u0456\u043b\u043e\u043c \u043a\u0430\u043d\u0430\u043b\u0456\u0432 \u0456 \u0444\u0456\u043b\u044c\u0442\u0440\u043e\u043c (F-OFDM) \u0454 \u0441\u0438\u0433\u043d\u0430\u043b\u043e\u043c, \u044f\u043a\u0438\u0439 \u043e\u0442\u0440\u0438\u043c\u0443\u044e\u0442\u044c \u043d\u0430 \u0432\u0438\u0445\u043e\u0434\u0456 \u0444\u0456\u043b\u044c\u0442\u0440\u0430. F-OFDM \u043f\u043e\u0440\u0456\u0432\u043d\u044f\u043d\u043e \u0437 OFDM \u0437\u0430\u0431\u0435\u0437\u043f\u0435\u0447\u0443\u0454 \u0437\u043d\u0438\u0436\u0435\u043d\u043d\u044f \u043f\u043e\u0437\u0430\u0441\u043c\u0443\u0433\u043e\u0432\u043e\u0433\u043e \u0432\u0438\u043f\u0440\u043e\u043c\u0456\u043d\u044e\u0432\u0430\u043d\u043d\u044f, \u0449\u043e \u043f\u043e\u043a\u0440\u0430\u0449\u0443\u0454 \u0445\u0430\u0440\u0430\u043a\u0442\u0435\u0440\u0438\u0441\u0442\u0438\u043a\u0438 \u0441\u0438\u0441\u0442\u0435\u043c\u0438. \u0421\u0442\u0430\u0442\u0442\u044f \u043f\u0440\u0438\u0441\u0432\u044f\u0447\u0435\u043d\u0430 \u043f\u043e\u0440\u0456\u0432\u043d\u044f\u043d\u043d\u044e \u0441\u0438\u0433\u043d\u0430\u043b\u0456\u0432 CP-OFDM \u0456 F-OFDM.
\n\u041a\u043b\u044e\u0447\u043e\u0432\u0456 \u0441\u043b\u043e\u0432\u0430: \u0441\u0438\u0433\u043d\u0430\u043b\u0438 CP-OFDM, \u0441\u0438\u0433\u043d\u0430\u043b\u0438 F-OFDM, \u0441\u043f\u0435\u043a\u0442\u0440\u0430\u043b\u044c\u043d\u0430 \u0433\u0443\u0441\u0442\u0438\u043d\u0430 \u043f\u043e\u0442\u0443\u0436\u043d\u043e\u0441\u0442\u0456, sinc-\u0444\u0456\u043b\u044c\u0442\u0440, \u0439\u043c\u043e\u0432\u0456\u0440\u043d\u0456\u0441\u0442\u044c \u043f\u043e\u043c\u0438\u043b\u043a\u0438 \u043d\u0430 \u0431\u0456\u0442.<\/p>\n

\u0420\u043e\u0437\u0448\u0438\u0440\u0435\u043d\u0430 \u0430\u043d\u043e\u0442\u0430\u0446\u0456\u044f \u0430\u043d\u0433\u043b\u0456\u0439\u0441\u044c\u043a\u043e\u044e \u043c\u043e\u0432\u043e\u044e<\/strong><\/p>\n

The aim of the study is to analyze the functioning of the PRACH system in overload conditions, when a large number of M2M devices with different priorities establish their connection to the access network.
\nFifth-generation (5G) systems provide increased data rates, use of low-latency over-the-counter (URLLC), have high spectral efficiencies, extensive connectivity, and increased energy efficiency. Multiplexing with orthogonal frequency division multiplexing and filter (F-OFDM) is a signal received at the output of the filter. F-OFDM compared to OFDM provides a reduction in out-of-band radiation, which improves system performance. The article is devoted to the comparison of CP-OFDM and F-OFDM signals.
\nConnecting multiple M2M devices to the network in a short period of time can cause a surge in PRACH channel loading due to its limited capacity. It is also interesting to note that the PRACH preambles, randomly selected by M2M devices, can be considered as code “channels” that do not overlap. When two or more terminals choose an identical preamble (channel), a situation resembling a typical collision between data packets occurs. This interpretation allows us to study the process of competition between M2M devices, based on the known results obtained for multi-channel random access protocols. As a result, it is possible to obtain an exact approximation in a given range of parameters of the PRACH system, such as the number of available preambles (M) and competing terminals (U), the size of the delay window, etc.
\nKeywords:<\/strong> CP-OFDM signals, F-OFDM signals, power spectral density, sinc filter, bit error probability.<\/p>\n

\u00a0References<\/strong><\/p>\n

    \n
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  3. Karunarathne, G.R.; Kulawansa, K.T.; Firdhous, M.M. Wireless Communication Technologies in Internet of Things: A Critical Evaluation. In Proceedings of the 2018 International Conference on Intelligent and Innovative Computing Applications (ICONIC), Plaine Magnien, Mauritius, 6\u20137 December 2018; pp. 1\u20135.<\/li>\n
  4. Li, S.; Da Xu, L.; Zhao, S. 5G Internet of Things: A survey. Ind. Inf. Integr. 2018, 10, 1\u20139.<\/li>\n
  5. Gomez, C.; Veras, J.C.; Vidal, R.; Casals, L.; Paradells, J. A Sigfox energy consumption model. Sensors 2019, 19, 681.<\/li>\n<\/ol>\n","protected":false},"excerpt":{"rendered":"","protected":false},"author":3,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":[],"categories":[60],"tags":[],"_links":{"self":[{"href":"https:\/\/journals.khnu.km.ua\/vestnik\/index.php?rest_route=\/wp\/v2\/posts\/11303"}],"collection":[{"href":"https:\/\/journals.khnu.km.ua\/vestnik\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/journals.khnu.km.ua\/vestnik\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/journals.khnu.km.ua\/vestnik\/index.php?rest_route=\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/journals.khnu.km.ua\/vestnik\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=11303"}],"version-history":[{"count":3,"href":"https:\/\/journals.khnu.km.ua\/vestnik\/index.php?rest_route=\/wp\/v2\/posts\/11303\/revisions"}],"predecessor-version":[{"id":11953,"href":"https:\/\/journals.khnu.km.ua\/vestnik\/index.php?rest_route=\/wp\/v2\/posts\/11303\/revisions\/11953"}],"wp:attachment":[{"href":"https:\/\/journals.khnu.km.ua\/vestnik\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=11303"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/journals.khnu.km.ua\/vestnik\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=11303"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/journals.khnu.km.ua\/vestnik\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=11303"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}