V.S. Ivanov1, S.U. Uvaysov2, I.A. Ivanov3

1–3 RTU MIREA (Moscow, Russia)
 

This article proposes a new method for calculating the service area of a trunking communication system base station, based on the calculation of attenuation losses on the radio signal propagation path in the direction of portable station- base station, taking into account the topographic map of the area. Trunking communication systems, which are one of the types of mobile communication systems, are designed for automatic distribution of communication channels between a group of subscribers. These systems are actively used by emergency response services, commercial organizations, as well as in conducting various sports events on the territory of our country. Models for calculating attenuation over the radio wave propagation interval are considered, such as the Okumura model, the Friis equation and the Hata model. The advantages and disadvantages of each model for urban, suburban and rural radio signal propagation environments are given. The model of the Hata for the urban environment, taken as a basis in the proposed method, is considered in detail.

The purpose of the study to develop a method for calculating the service area of a trunking communication system base station.

An algorithm has been developed that will be used in a web application that allows calculating the service areas of base stations in the areas specified by the user. In addition to the installation heights of the base and portable station antennas, the terrain is also taken into account in the calculations. At the location of the stations, the topographic map of the area determines the altitude above sea level, which is then used in the model Hata. Calculations of the level of losses on the radio signal propagation route in the urban environment were carried out and the maximum service area of the base station was determined using the example presented. The limitation for the proposed method is the mountainous terrain.

When assessing the service area of a trunking communication system, it is necessary to choose the conditions for radio wave propagation, since they are different for urban areas, hilly and rural areas. While there is no line of sight between the receiver and the transmitter in urban areas, both devices can be in the direct line of sight in rural areas. Next, one starts to calculate the power radiated into the air, the average signal power at the receiving antenna, with which the given sensitivity of the receiver is ensured and determines the permissible loss level on the radio signal propagation path.

Ivanov V.S., Uvaysov S.U., Ivanov I.A. Algorithm for calculating the service area of the trunking communication system base station. Science Intensive Technologies. 2023. V. 24. № 4. P. 12−20. DOI: https://doi.org/ 10.18127/j19998465-202304-02 (in Russian)

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