The Radio Message System enables the relief of traffic on busy radio frequency channels by using short data telegrams for routine messages.
After more than 25 years operation, the system has shown excellent performance in practical use in Germany. Authorities and Organizations with Security Tasks (BOS) in Germany have a "Technical Directive" with an exact system description with which a standard data transfer procedure was developed. This procedure was introduced by the police, fire departments and their support organizations as signaling system between mobile radio subscribers and the stationary RT equipment.
The RMS enables a significant reduction in time of message exchanging in RT traffic circles between mobile task forces and main control panel through the transmission of digital short telegrams instead of analogue speech for defined tactical messages and instructions.
The Radio Message System opens the use of automated computer operated main control panel that enables rapid overview of the mobile forces being monitored by the main panel and therefore increase the efficiency.
Because of the reduced occupation duration of respective RT traffic channels, higher channel utilization is gained for important calls. The Radio Message System fulfills the following demands:
sufficient transmission security,
operability
of the different types of relay traffic used by security authorities and
via various
serviceableness with the introduced and standardized RT systems according to the BOS technical directive without interfering in the equipment,
compatibility of RMS additional equipment from different manufacturers according to the technical directives.
Status messages key operation enables the mobile RMS to send messages to stationary main control panel.
In addition, the vehicle units include an evaluator for incoming telegrams. Correct identified telegrams are, depending on receipt requirement, automatically acknowledged. In general, the mobile RMS equipment expects a receipt telegram for outgoing telegrams. If a receipt is not received from the stationary radio equipment, telegram transmission will be repeated automatically.
RADIODATA RMS vehicle equipment for the transmission of sequence telegrams according to BOS directives is suitable for prospective applications. With this, e.g. coded location messages can be transmitted from vehicle equipment or if necessary can be inquired by the main control panel.
In text transmission mode, a maximum of 99 characters in a chain of sequence telegrams can be sent from the stationary side to the mobile side.
According to the various tactical requirements of the BOS, the Radio Message System operates with add-ons to the RT equipment on the stationary and the mobile side.
With the mobile RMS unit of the subscriber's mobile radio set, coded messages are transmitted to evaluator of the main control panel, and passed on to the main control panel computer for further processing after being checked for faultlessness. The stationary RMS main control panels must be able to communicate with all types of RMS vehicle equipment according to TR-BOS. Depending on requirements, all incoming telegrams are acknowledged automatically. Key operation releases selective addressed telegrams for the transmission of remote instructions (orders and remote control data). The distinction between incoming and outgoing telegrams is ensured by direction identification.
RADIODATA offers all main control panel equipment as defined in the Technical Directive.
The directive defines following equipment:
Main control panel, type A, as elementary one channel RT unit (FGA3-V24)
Main control panel, type B and D, multi-channel installation (LSG8-V3)
Main control panel, type C, RMS PC main control panel (FGAPC-3).
After amendment of the directive in summer 1999, RADIODATA RMS main control panels operate with text transmission to mobile radio subscriber according to adapted software.
