Cellular time division radio system - carries out automatic synchronisation of radio transmitters using received data telegrams

摘要

The system has at least one radio centre (FZ), addressable radio transmitters (FS) and addressable single channel signal receivers (FE). The centre (FZ) transmits a data telegram (DT) containing the receiver address and data for a particular receiver (FE). The receiver (FE) intercepts the telegram (DT) directly or via one or more transmitters (FS) and analyses it. Each telegram (DT) includes a time division criterium (K1) which characterises the current time slot (ZS1) of the transmitting centre (FZ) or repeater (FS). The time division criterium (K1) evaluated by the transmitter (FS1, FS2) within range synchronises the transmitters. The transmitter (FS1) addresses by a route address (W) of the telegram (DT) temporarily stores the telegram data, inserts its own criterium (K2) instead of that (K1) of the centre (FZ1) and transmits the new telegram (DT2) in its allocated time slot (ZS2). ADVANTAGE/USE - Reduces cost of and simplifies synchronised transmission stations operating at same frequency. Esp. for radio alarm systems, etc.