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presents the role and location of the following open interfaces: Radio-interface-AIR IF (for TMO interaction) and Radiointerface DMO (for direct connection), and Inter-system interface-ISI and Interface for connecting data transmission terminals -TEI, and within the demonstrated infrastructure of two independent TETRA networks, which basically (each of them) consist of BRSt, devices with independent switching, and KBRSt with integrated switching (Base Station, Switch, Base Station Controller).
Source publication
Introduction/purpose: Since the end of 1995, when TETRA MoU promoted
the new TETRA Standard within ETSI, tentatively called TETRA 1, it
quickly began to be used, almost exclusively, for the construction of
Functional UHF digital trunking systems for mobile radio communications.
Methods: A description of the relevant issues from the TETRA 1
technolo...
Context in source publication
Context 1
... connection between the "time slots" in the TDM primary frame and the user communication radio channels is as follows: each time slot represents a certain period of time associated with one communication radio channel ( Figure 6). It can be seen from the figure that the communication radio channel is actually a sequence of equally numbered "time slots" from continuous-successive TDM primary frames. ...
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Citations
... The DMR is a transmission standard based on the "ETSI EN 300 113" standard [31], specifically intended for Mobile or Private Mobile Radio (PMR) based on digital technology [32,33,[27][28][29][30], sometimes called Public Access Mobile Radio (PAMR) users [27][28][29][30]. On the other, the European Telecommunications Standards Institute (ETSI) has developed the Terrestrial Trunked Radio (TETRA) [34][35][36][37] as a PMR or PAMR to give the possibility for cross-border networks in Europe [27][28][29][30]. The effort is to respond to the requirements of commercial services and emergency services, ideally suited for professional and high-performance mobile radio solutions, and offer a high level of investment protection [35][36][37]. ...
... On the other, the European Telecommunications Standards Institute (ETSI) has developed the Terrestrial Trunked Radio (TETRA) [34][35][36][37] as a PMR or PAMR to give the possibility for cross-border networks in Europe [27][28][29][30]. The effort is to respond to the requirements of commercial services and emergency services, ideally suited for professional and high-performance mobile radio solutions, and offer a high level of investment protection [35][36][37]. ...
A radio communication system (RCS) based on digital trunking of the digital mobile radio (DMR) type of Tier-III with any of the brands is installed, consisting of mobile radio devices, portable radio devices, repeater devices, devices antenna, and power supply device. The technical specifications for these types of equipment have been approved by institution-owned. This paper describes a radio communication system infrastructure based on a digital trunking RCS for predicting the area coverage for independent or private use. The research contributions of this study include (a) predicting the signal of area coverage of the repeater and radio devices and (b) observing results of communication performance on the DMR Tier-III Trunking radio communication system. Research methods for achieving research objectives, including five main parameters are required connectivity, the DMR application for predicting radio signal area coverage of the repeater system, and observation of the communication performance. Tuning on the repeater system include five conditions, while on radio equipment includes four conditions. Prediction and observation of the coverage area based on seven parameters as input. The simulation results are in the form of a screenshot with an area coverage of 140.938 kilometers. The observation of communication performance through dummy loads in the form of providing types of artificial condition calls. In general, after the research objectives are obtained, it is expected that the system is well connected.
