ATE189550T1 - METHOD FOR INCREASING THE INTERFERENCE PROTECTION OF A RADIO ALARM SYSTEM - Google Patents

METHOD FOR INCREASING THE INTERFERENCE PROTECTION OF A RADIO ALARM SYSTEM

Info

Publication number
ATE189550T1
ATE189550T1 AT94118445T AT94118445T ATE189550T1 AT E189550 T1 ATE189550 T1 AT E189550T1 AT 94118445 T AT94118445 T AT 94118445T AT 94118445 T AT94118445 T AT 94118445T AT E189550 T1 ATE189550 T1 AT E189550T1
Authority
AT
Austria
Prior art keywords
radio alarm
data telegram
alarm
increasing
alarm system
Prior art date
Application number
AT94118445T
Other languages
German (de)
Inventor
Horst Dipl-Ing Elsinger
Werner Dipl-Ing Haake
Original Assignee
Grundig Ag
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Grundig Ag filed Critical Grundig Ag
Application granted granted Critical
Publication of ATE189550T1 publication Critical patent/ATE189550T1/en

Links

Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B25/00—Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems
    • G08B25/01—Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems characterised by the transmission medium
    • G08B25/10—Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems characterised by the transmission medium using wireless transmission systems
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B25/00—Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems
    • G08B25/007—Details of data content structure of message packets; data protocols

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Alarm Systems (AREA)
  • Detection And Prevention Of Errors In Transmission (AREA)

Abstract

The alarm reliability improvement system identifies each transmitted data telegram received from an external radio alarm (A1..An) by the central control and uses a coding method for verifying its validity. The external radio alarms are coupled to the central control via a unidirectional transmission path, with controlled variation of each transmitted data telegram at the transmission side and detection of these variations at the reception side, e.g. by varying known data telegrams in the same manner. Each data telegram may have an identification section for the respective radio alarm and a variable section which is varied during each transmission.
AT94118445T 1993-12-23 1994-11-24 METHOD FOR INCREASING THE INTERFERENCE PROTECTION OF A RADIO ALARM SYSTEM ATE189550T1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE4344120A DE4344120C1 (en) 1993-12-23 1993-12-23 Method for increasing the interference immunity of a radio alarm installation

Publications (1)

Publication Number Publication Date
ATE189550T1 true ATE189550T1 (en) 2000-02-15

Family

ID=6505963

Family Applications (1)

Application Number Title Priority Date Filing Date
AT94118445T ATE189550T1 (en) 1993-12-23 1994-11-24 METHOD FOR INCREASING THE INTERFERENCE PROTECTION OF A RADIO ALARM SYSTEM

Country Status (3)

Country Link
EP (1) EP0660285B1 (en)
AT (1) ATE189550T1 (en)
DE (2) DE4344120C1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4408268C2 (en) * 1994-03-11 2000-11-02 Grundig Ag Procedure for increasing the interference immunity of a radio alarm system
DE19505199A1 (en) * 1995-02-16 1996-08-29 Wolfgang Dipl Ing Sachs Anti-theft radio alarm installation with in-built security
DE10133367C2 (en) * 2001-07-10 2003-10-23 Horst Ziegler Consumer meter with a radio transmitter for radio transmission of meter reading information

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3735353A (en) * 1971-10-28 1973-05-22 Johnson Service Co Alarm transmission line security system utilizing pseudo random encoding
EP0293627A1 (en) * 1987-05-19 1988-12-07 Ascom Radiocom AG Radio transmission method
AU5358190A (en) * 1989-05-18 1990-12-18 Siemens Aktiengesellschaft Transmission and receiving system
IT1249903B (en) * 1991-06-07 1995-03-30 Trw Sipea Spa OPTIMIZED SECURITY REMOTE CONTROL
DE4141035C1 (en) * 1991-12-12 1992-12-17 Schaaf, Norbert, 6200 Wiesbaden, De

Also Published As

Publication number Publication date
EP0660285B1 (en) 2000-02-02
DE59409121D1 (en) 2000-03-09
EP0660285A1 (en) 1995-06-28
DE4344120C1 (en) 1994-12-08

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Legal Events

Date Code Title Description
REN Ceased due to non-payment of the annual fee