Method of radio transmission in a danger alarm system

Details Method of radio transmission in a danger alarm system Method of radio transmission in a danger alarm system

2002-09-03

2009-06-23

Urban, Edward (Department: 2618)

Telecommunications

Transmitter and receiver at separate stations

Plural transmitters or receivers

C340S506000

Reexamination Certificate

active

07551936

ABSTRACT:
A method for radiotransmission in a danger alarm system that operates by way of repeaters but has a current-saving design, so that battery operation is possible. The reception means are switched on cyclically at preassigned points in time, and transmission-ready participants send a preamble leading to the result that the intended recipient participants, in event of reception, remain switched on until the end of the complete preamble, and in the event that no preamble is received, are switched on again. In the preamble, a point in time is transmitted at which the receiver switches on again, to receive the data telegram proper.

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