Abstract
Introduction/purpose: For the construction of functional mobile radio communication systems today, the trunking systems of digital mobile radio communications are almost exclusively used, the main representative of which is the system with the application of TETRA standards. This article describes the beginnings and historical development of this standard, with the activities of ETSI and TETRA MoU in the fight for the availability and harmonization of the frequency spectrum. Methods: A description of relevant issues of the origin and development of the TETRA 1 standard is given as well as the analysis of the characteristic moments of the innovated TETRA 2 standard. Results: This article describes the beginnings and historical development of this standard, with the activities of ETSI and TETRA MoU in the fight for the availability and harmonization of the frequency spectrum. It also systematize the use of the key TETRA systems in the world and shows its share in the world market by sectors, emphasizing the dilemma of its further development at the crossroads after 25 years of existence. Also, a basic overview of the TETRA 1 standard is given while the basic elements and the principle of its application are described. The innovated TETRA 2 standard and the improvements achieved in the way of data transmission are described in more detail; the process of interoperability certification and, in connection with that, the entry of TETRA into the North American market is emphasized. The parameters selected for advanced data transfer according to the TETRA 2-TEDS standard are presented and analyzed, together with an overview of some limitations during practical application. Conclusion: In the conclusion, the current moment of TETRA is analyzed with a focus on its future after 25 years of development, emohasizing a possibility of modernizing and improving the TETRA network of the Ministry of the Interior of Serbia for the needs of the MoD and the Serbian Armed Forces.
Highlights
The earliest beginnings of TETRA (Terrestrial Trunked Radio) date back to 1989, when four leading European companies for the production of mobile radio equipment: Ericsson, Motorola Solutions, Nokia and Philips, began work on the development of digital trunking systems for mobile radio communications, called MDTRS (Mobile Digital Trunked Radio System)
While the development of the P25 standard was the responsibility of the North American public-safety community (NAPsC), TETRA was developed under the auspices of the European Telecommunications Standards Institute (ETSI), supported by many manufacturers and equipment vendors, system users and, regulatory bodies. (Ovčinnikov et al, 2000), (Svrzić & Ćosović, 2002a), (Swan, 2015)
The innovated TETRA standard with TEDS created the conditions which enabled its implementation in the field to achieve fully completed results of providing quality advanced services for the integration of voice transmission and fast data transmission (“voice” and “data” services), as follows:
Summary
This article describes the beginnings and historical development of this standard, with the activities of ETSI and TETRA MoU in the fight for the availability and harmonization of the frequency spectrum. It systematize the use of the key TETRA systems in the world and shows its share in the world market by sectors, emphasizing the dilemma of its further development at the crossroads after 25 years of existence. A basic overview of the TETRA 1 standard is given while the basic elements and the principle of its application are described. S., 25 years of TETRA technology and standards for contemporary digital trunking systems of professional mobile radio communications, pp.[426-460]
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