A model diagram of a radio network used by Police units in Poland which integrates both conventional and trunked radio communication systems.
The installation comprises 26 dispatch centres at various organizational levels of the Lubuskie Province Police, all of which are mutually interconnected and create a network of shared base stations.
In this particular case, our solution enabled a creation of an extensive radio network covering the entire region.
When creating the network, we made use of the customer’s already existing NetPerformer-based infrastructure, combining the Q.SIG signalling (audio) and the Frame Relay protocol (data). The interconnection of all Multikom systems and, therefore, their integration into one network enables making any base station throughout the system permanently or temporarily available to any of the dis- patch consoles. The migration from the original synchronized network connec- tions to the new one, which uses the IP OST112 packet network, was conducted in 2012.
In subsequent years, the system was sup- plemented with IP interfaces designated for a network of radio repeaters operating in the DMR standard.
In a rather hasty manner, the system was designed, set up and used as a cornerstone for communication between police o cers who were on duty at the National Stadium in Warsaw during the European Championship in 2012.
It ensured integration of all radio systems used by the customer during EURO 2012, i.e. conventional radio network, EDACS and TETRA. The functionality of the Un- ikom 7 console was greatly expanded with the possibilities and functions o ered by the EDACS trunk network. As mentioned above, the greatest challenge with regards to this project was the limited time to install, commission, and implement the system. At present, several more Multikom systems are being installed and com- missioned on the territory falling under the responsibility of the Metropolitan Police and they will eventually be part of a network enabling resource sharing between individual police stations.
This project was similar in its scope and the applied solutions to the one which was implemented for the Lubuskie Province Police. It com- prises 25 independent Multikom 2 dispatch systems that operate over conventional radio networks and support telephone communication, using the CTI interface.
Dispatch centre operators are able to access any base station within the entire province. Originally, NetPerformer-based protocols (Q.SIG + Frame Relay) were used for network connections between the autonomous systems. In 2012, an actual migration to the OST112 IP network was completed and the individual district systems were sup- plemented with interfaces for the Mototrbo DMR network.
The system set up for The Warsaw Municipal Police is an example of a dispatch system in which we have integrated trunked digital and analogue networks (TETRA, EDACS) as well as conventional analogue radio networks into a single homogenous platform.
The dispatch centres can engage in voice communication over TETRA and EDACS networks and also over the conventional (analogue) system. The possibility to tem- porarily interconnect di erent radio co- mmunication systems is a critical function. Thus, Municipal Police o cers are able to communicate directly despite the fact that they may be using various terminals operating under di erent systems. In 2014, the Warsaw Municipal Police were provided a new trunked radio sys- tem; Nexedge standard by Kenwood. The Multikom system is linked up with the Nexedge system via an IP network using a protocol designed by the trunked system manufacturer.
Apart from enabling voice communica- tion, the connection between the two plat- forms allows the various special features o ered by Nexedge to be controlled from Multikom consoles, including visualization of the current location of the dispatcher on the map. In addition, the location data is transmitted from the Multikom system to an external control application through the API interface.