Digital divided repeater

DIGITAL DIVIDED REPEATER

The availability of radio signal from cellular operators and the services of the Integrated Emergency System in terrain, streets, buildings is an important part of people and property security.

The goal of operators' networks is to cover the area with a maximum population density, mainly in large cities and agglomerations. Therefore, the priority is the connection capacity for the largest number of users.

On the other hand, for the services of the Integrated Emergency System, the stress is laid not only on the connection in places with a high population density but especially in the areas with important state infrastructure. These include, for example, roads, tunnels, metro and other infrastructure objects.

Therefore, the priority for the connection of the services of the Integrated Emergency System is to cover the largest area and buildings or terrain profiles with unusual shapes.

The connection capacity is not such a high priority for the services of the Integrated Emergency System in comparison with mobile operators, since the number of users, i.e. police, fire fighters and rescue workers, is limited and the services of the Integrated Emergency System are fully organized.

Repeater does not increase the network capacity though but significantly extends the covered area. Repeater is much cheaper than base station, the use of repeaters is therefore the basis for a large number of projects.

In both, the underground and the outdoor areas, the source of the signal (i.e. the base station) and the covered target area are often distant from each other for several kilometres. It is therefore very difficult to ensure sufficient coverage of the target area by a conventional repeater with two nearby antennas.

The solution is to divide the repeater into two parts and connect these parts by an analogue high-frequency path, typically by an optical fibre or a coaxial cable.

Example of outdoor solution:


Pic. 1 Current status

 
Pic. 2 New Solution