Radio relay communication systems (RRS) today are the most important type of transport information networks: the vital activity of the vast majority of the world's population depends on them to one degree or another.
This technology involves the
transmission of information through a network of relay radio stations. Land lines transport the radio signal in the decimeter and centimeter ranges, at frequencies from several hundred MHz to several tens of GHz.
Radio relay communication systems have the following advantages:
- the ability to transmit a signal as narrowband or broadband;
- multichannel and duplex (two-way, providing both reception and transmission) communication between subscribers;
- almost complete immunity to atmospheric interference and industrial "background";
- much less, compared with wired communication, network organization time;
- narrow focus of antenna devices, which limits the increase in the overall electromagnetic background of the area.
However, the use of RRS is not without drawbacks caused by the need to ensure:
- high antenna location and direct geometric "visibility" between adjacent transceivers;
- increasing the number of
intermediate stations in proportion to the increasing distance of the signal transmission.
In addition, these systems have cumbersome communication equipment, and the construction of networks in inaccessible areas is fraught with difficulties in its delivery and installation.
All of the above plays an important role in the fact that radio-relay communication lines are replaced wherever possible by fiber-optic (FOCL). Contribute to their crowding out and the constant growth of traffic, loads on transport networks. In the cities of fiber-optic communication lines, they will undoubtedly gradually dominate, but the scale of Russia and the features of the development of transport lines predetermine the belief that radio relay communication systems will be used quite widely in the coming decades. In the vastness of our country, a huge number of places in which the construction and deployment of fiber optic links simply will never pay off.
And even when using optical fiber as the main network, the need for backup does not disappear anywhere, because cable lines are prone to breakage and, as a result, rather long downtime. And as backup radio relay communication systems do not have competitors.
Moreover, one can speak not only about their preservation, but also about further development: a new impulse to this is provided by the digital TV that is entering our life. In the organization of broadcasting digital television, PPCs are an ideal solution, offering the most acceptable communication quality, cost and deployment speed to date. This is most pronounced when broadcasting in single-frequency mode. And in connection with the simplification of the import / registration of equipment and the receipt of permits, the growth of interest in RRS from enterprises and organizations is forecasted when creating corporate networks.