Global Patent Index - EP 0660285 B1

EP 0660285 B1 2000-02-02 - Method for increasing the fault security of a radio alarm system

Title (en)

Method for increasing the fault security of a radio alarm system

Title (de)

Verfahren zur Erhöhung der Störsicherheit einer Funkalarmanlage

Title (fr)

Procédé pour l'élévation de la sécurité contre les pertubations dans un système radio d'alarme

Publication

EP 0660285 B1 (DE)

Application

EP 94118445 A

Priority

DE 4344120 A

Abstract (en)

[origin: DE4344120C1] In known radio alarm installations with single-direction exchange of data messages between external units and the central unit, a problem is created by the occurrence of false alarms (spurious alarms) which arise as a result of the manipulations of the radio signals which transmit the data messages. In a radio alarm installation which uses the method according to the invention this problem is eliminated in that after each transmission process the data messages which are to be transmitted are changed, as a result of which attempts to manipulate by evaluating the radio signals is made considerably more difficult.

IPC 1-7 (main, further and additional classification)

G08B 29/16

IPC 8 full level (invention and additional information)

G08B 25/10 (2006.01)

CPC (invention and additional information)

G08B 25/10 (2013.01); G08B 25/007 (2013.01)

Designated contracting state (EPC)

AT CH DE FR GB IT LI

EPO simple patent family

DE 4344120 C1 19941208; AT 189550 T 20000215; EP 0660285 A1 19950628; EP 0660285 B1 20000202

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