If radio communication with a CONTINUOUS coverage zone has to be organized (and this is a natural wish by most customers), usually use is made of trunking radio communication, or if there is a shortage of frequency resources and/or the number of subscribers is too small, then Simulcast (quasi-synchronous broadcasting) mode of operation on one pair of frequencies is used.
Such solutions imply the availability of vast resources – both that of frequency and financial. Besides, it requires a reference channel (used for communication between base stations) with special requirements.
Recall that the main problem in crossing coverage zones of base station transmitters (an essential condition for ensuring uninterrupted radio communication) is a phenomenon very well known in physics as interference (for specialists we add that we simplify the problem essence intentionally but it is so in the first approximation).
The second problem lies in the selection of the best subscriber signal received by base stations.
Considered below are the typical examples of a solution of such problems based on our FR-104 RoIP (Radio-over-IP) controller, and a Voter server comparing RSSI levels from the system radio receivers and transmitting the best signal to the system transmitters in continuous mode, and for any analog radios.
Note that such a territorial integration of subscribers via several base stations is solved currently only for digital channel subscribers. For analog subscribers, nobody can offer such a solution (digital repeaters that “understand” analog subscriber provide repeating only within one their “own” base station).
There is an exception – Transcoder function by Etherstack company – in a very expensive solution for APCO25 standard, and … our new DRC-1000 controller correlating simultaneously analog groups separated by PL-codes to APCO-25 digital groups in the coverage zone of several repeaters.