EP0660285B1 - Procédé pour l'élévation de la sécurité contre les pertubations dans un système radio d'alarme - Google Patents

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

Info

Publication number
EP0660285B1
EP0660285B1 EP94118445A EP94118445A EP0660285B1 EP 0660285 B1 EP0660285 B1 EP 0660285B1 EP 94118445 A EP94118445 A EP 94118445A EP 94118445 A EP94118445 A EP 94118445A EP 0660285 B1 EP0660285 B1 EP 0660285B1
Authority
EP
European Patent Office
Prior art keywords
data telegram
central unit
data
unit
changed
Prior art date
Legal status (The legal status 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 status listed.)
Expired - Lifetime
Application number
EP94118445A
Other languages
German (de)
English (en)
Other versions
EP0660285A1 (fr
Inventor
Horst Dipl.-Ing. Grundig E.M.V. Elsinger
Werner Dipl.-Ing. Grundig E.M.V. Haake
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Grundig AG
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
Publication of EP0660285A1 publication Critical patent/EP0660285A1/fr
Application granted granted Critical
Publication of EP0660285B1 publication Critical patent/EP0660285B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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

Definitions

  • the invention relates to a method for increasing the Interference immunity of a radio alarm system according to the generic term of claim 1.
  • Alarm systems have become a valuable aid in the surveillance of apartments or buildings. Fire, theft, burglary and robbery are reported without delay.
  • the individual components of an alarm system perform the following tasks: Detection, evaluation and alarm. These three tasks are solved by different components of an alarm system.
  • An alarm is recognized by detectors (detectors), which have different sensors depending on the type of detector (e.g. fire, broken glass or water detector).
  • the signals generated by one or more detectors are evaluated in a central unit. On the basis of the detector signals and additional status variables, a decision is made in the central unit whether an alarm should occur. This can then be done by forwarding an alarm signal to the police or by activating acoustic and / or visual alarm devices (sirens, alarm lights, etc.).
  • Radio alarm systems are used, the components of which Radio links are connected.
  • These radio alarm systems consist of a central unit with a Power supply, a radio receiver, one Alarm device and outdoor units with one off-grid power supply, a detector and a Radio transmitter. By sending data telegrams the outdoor units are connected to the central unit.
  • the data telegrams contain code numbers, which the Clearly identify outdoor units. Depending on the The number of bits used for this can be more or assign fewer code numbers.
  • the transmitters of the Outdoor units only receive data telegrams if the Detectors detect an accident. These data telegrams are repeated at short intervals until the Fault is eliminated.
  • the transmitter of the outdoor units at fixed intervals Send special data telegrams as status messages.
  • the Data telegrams for status messages are sent at intervals of several hours in the outdoor units and radiated, whereby the central unit the proper Can monitor the functioning of the outdoor units. For Differentiation between the different data telegram types can add additional bits to the data telegrams become.
  • a radio alarm system that is easy to install afterwards with increased interference immunity of the radio links is from the EP 0 293 627 A1, in which a Radio transmission method for the transmission of Information between a central unit and one Number of outdoor units is described. It is for the bidirectional radio transmission the same Radio frequency used. All outdoor units that the Detectors and transmitters and receivers include first of all when there is a total query checks whether they can send their sender Information turned on. Will be at least one If the transmitter is switched on, the outdoor units are recognized queried one after the other in a time-division multiplex method.
  • the outdoor units have unique code numbers assigned that are fixed or by means of Switches can be set.
  • the code numbers are Part of data telegrams between Central unit and outdoor units are exchanged.
  • the known radio alarm system has the disadvantage on that from the outside with appropriate technical Facilities but also with an identical outdoor unit by trying out the possible code numbers faults or alarm triggers can be caused.
  • a suitable technical Equipment for radio signals between outdoor units and Maintaining the central unit and registering it. The registered signals can then by the technical Equipment will be sent out again, causing the Radio alarm system can be manipulated.
  • the computing units have a memory in which the algorithmic function is stored. Detects one Outdoor unit sends an alarm, it sends a data telegram to the central unit. In the central unit it will Data telegram processed and a request signal generated, which the outdoor unit to repeat the Data telegram initiated. This is done in the outdoor unit the request signal of the algorithmic function subject. The data telegram generated in the process is saved as Repetition signal sent to the central unit. There in the central unit has the same algorithmic function is present, the same can be done in the central unit Data telegrams are generated and saved like it is is generated in the outdoor unit. That from the outdoor unit sent repetition signal is in accordance with compared to the saved data telegram. A Mismatch indicates one Attempt to influence, an alarm is not triggered.
  • the invention is therefore based on the object Specify procedures that achieve a high Interference immunity in a radio alarm system with low Realization effort enables.
  • the advantage of the method according to the invention lies especially in that one according to this procedure operated radio alarm system despite low Realization effort a high level of interference immunity Radio connection between the outdoor units and the Central unit has.
  • the invention is based on a Embodiment explained in more detail. The only one shows Figure the basic structure of a Radio alarm system operating according to the method.
  • the radio alarm system has several Outdoor units A1 to An and a central unit Z on.
  • Outdoor units A1 to An each have one Detector D, a computing unit RA, a battery or a battery B and a transmitter S.
  • the computing unit RA the for example, be formed by a microcomputer can, evaluates the signals of the detector D and controls the respective outdoor unit.
  • the central unit comprises a receiver E, one Computing unit RZ, an alarm device A and a Power supply SV.
  • the computing unit RZ the for example, be formed by a microcomputer can evaluate the received radio signals of the associated Outdoor units A1 to On off and controls the Central unit.
  • the data telegram consists of a characteristic Identification part of each of the outdoor units A1 to On clearly identified by a code number, and off a change part, which after each transmission a Data word in the respective outdoor unit A1 through An the computing unit RA is changed.
  • a characteristic Identification part of each of the outdoor units A1 to On clearly identified by a code number
  • a change part which after each transmission a Data word in the respective outdoor unit A1 through An the computing unit RA is changed.
  • the central unit Z is the last one used data telegram of the outdoor units A1 to An known. With a later in normal operation, further transmission of a data telegram changed change part together with the Identification part sent as a new data telegram. There the data telegram last sent in the central unit Z was evaluated, the changed part of the change the computing unit RZ can be determined, whereby the new Data telegram in the central unit Z is known.
  • the Determination of the change part in the central unit Z is possible because the same in the computing unit RZ Algorithm for changing the change part available is how it is in the computing units RA of the outdoor units A1 to An is present. The algorithm can work for everyone Outdoor units A1 to An be the same. Using different algorithms result in an increase interference immunity.
  • a correct Evaluation and alarm message using the alarm device A take place or be suppressed.
  • An identification of the The type of the data telegram can be part of the Identification part and there by means of additional Bits are marked. Is it the Data telegram around a status message which - as at the beginning mentioned - is sent at certain intervals, and results the evaluation a mismatch of the received Data telegram with the expected data telegram indicates this is due to the attempt to remove an unauthorized person Cover up the outdoor unit, an alarm is triggered.
  • the described disturbances can be prevented if not only from the computing unit RZ in the central processing unit the data telegram to be expected next for the outdoor units A1 to An is determined, but at least one further data telegram. Be on this Way several, e.g. a total of three data telegrams (the expected and two more) are determined by short reception disturbances do not cause false alarms, if up to two previous data telegrams are not were received. In addition, it can be provided that if the received data telegram matches one of the other data telegrams the other Data telegram the basis for determining the the next expected data telegram. Thereby short-term occurrences appearing on the radio link Faults compensated.
  • the simplest algorithm to change the The change part is the raising or lowering of one the number forming the change part (e.g. binary number the from the bits used for the change part results).
  • Other algorithms are known per se and are, for example, in the German Patent specification DE 41 41 035 C1 described.
  • the Change of the data telegrams for example, by Application of a polynomial to the data telegram in the Outdoor units and the central unit can be reached.
  • the Coefficients of the polynomial can be represented by a (pseudo) Random process to be determined in the same way in the respective outdoor unit and the central unit is set.

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)

Claims (8)

  1. Procédé pour accroítre la sécurité contre des perturbations parasites d'une installation d'alarme radio comportant une liaison radio unidirectionnelle entre des unités extérieures (A1 ... An) et une unité centrale (Z), selon lequel les unités extérieures envoient des télégrammes de données à l'unité centrale, les télégrammes de données des unités extérieures respectives étant connues et leur validité étant contrôlée dans l'unité centrale,
    caractérisé en ce
    que les télégrammes de données de chaque unité centrale sont modifiés d'une manière prédéterminée après chaque processus d'émission, et
    que dans l'unité centrale après chaque processus de réception d'un télégramme de données, cette modification est contrôlée, notamment par le fait que télégramme respectif de données, qui est connu dans l'unité centrale, est modifié de la même manière que le télégramme de données de l'unité extérieure qui effectue l'émission.
  2. Procédé selon la revendication 1, caractérise en ce que chaque télégramme de données est constitué par une partie d'identification qui caractérise l'unité extérieure respective, et par une partie de modification, qui est modifiée après chaque opération d'émission/réception.
  3. Procédé selon la revendication 2, caractérisé en ce que la partie de modification est formée par un nombre et est modifiée par accroissement continu ou réduction continue.
  4. Procédé selon la revendication 1, caractérisé en ce qu'un télégramme de données, qui est constitué uniquement par la partie d'identification, est modifié après chaque processus d'emission/réception dans l'unité extérieure respective et dans l'unité centrale.
  5. Procédé selon la revendication 2 ou 4, caractérisé en ce que le télégramme de données est modifié à l'aide d'une ou de plusieurs fonctions algorithmiques, qui sont présentes dans les unités extérieures et dans l'unité centrale.
  6. Procédé selon l'une des revendications 1 a 5, caractérisé en ce que la modification du télégramme de données respectif est le résultat d'un processus pseudoaléatoire.
  7. Procédé selon l'une des revendications 1 à 6, caractérisé en ce qu'au moins un autre télégramme modifié de données est déterminé par avance dans l'unité centrale pour chaque unité extérieure à contrôler, en dehors du télégramme de données comportant la modification immédiatement suivante, et que la concordance éventuelle des télégrammes de données reçues par des unités extérieures avec le télégramme de données, qui comporte la modification immédiatement suivante respectivement attendue, ainsi qu'avec le ou les télégrammes de données déterminés par avance, est contrôlée dans l'unité centrale.
  8. Procédé selon la revendication 7, caractérisé en ce qu'en cas de concordance du télégramme de données respectivement reçu avec l'un des autres télégrammes de données déterminés par avance, le télégramme de données qui succède au télégramme de données reçu est fixé, pour l'instant suivant de réception, en tant que télégramme de données attendu, dans l'unité centrale.
EP94118445A 1993-12-23 1994-11-24 Procédé pour l'élévation de la sécurité contre les pertubations dans un système radio d'alarme Expired - Lifetime EP0660285B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4344120 1993-12-23
DE4344120A DE4344120C1 (de) 1993-12-23 1993-12-23 Verfahren zur Erhöhung der Störsicherheit einer Funkalarmanlage

Publications (2)

Publication Number Publication Date
EP0660285A1 EP0660285A1 (fr) 1995-06-28
EP0660285B1 true EP0660285B1 (fr) 2000-02-02

Family

ID=6505963

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94118445A Expired - Lifetime EP0660285B1 (fr) 1993-12-23 1994-11-24 Procédé pour l'élévation de la sécurité contre les pertubations dans un système radio d'alarme

Country Status (3)

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

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4408268C2 (de) * 1994-03-11 2000-11-02 Grundig Ag Verfahren zur Erhöhung der Störsicherheit einer Funkalarmanlage
DE19505199A1 (de) * 1995-02-16 1996-08-29 Wolfgang Dipl Ing Sachs Eigensichere Funkalarmanlage mit tragbaren Sendern und Empfängern
DE10133367C2 (de) * 2001-07-10 2003-10-23 Horst Ziegler Vebrauchszähler mit einer Funksendeeinrichtung zur Funkübertragung von Zählerstandsinformationen

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 (fr) * 1987-05-19 1988-12-07 Ascom Radiocom AG Méthode de transmission radio
US5365225A (en) * 1989-05-18 1994-11-15 Siemens Aktiengesellschaft Transmitter-receiver system with (re-)initialization
IT1249903B (it) * 1991-06-07 1995-03-30 Trw Sipea Spa Telecomando a sicurezza ottimizzata
DE4141035C1 (fr) * 1991-12-12 1992-12-17 Schaaf, Norbert, 6200 Wiesbaden, De

Also Published As

Publication number Publication date
EP0660285A1 (fr) 1995-06-28
ATE189550T1 (de) 2000-02-15
DE4344120C1 (de) 1994-12-08
DE59409121D1 (de) 2000-03-09

Similar Documents

Publication Publication Date Title
EP0484880B1 (fr) Système radio d'alarme
DE3342430C2 (fr)
DE69917775T2 (de) System und verfahren zur detektion eines antennenausfalls
DE4344172C2 (de) Verfahren und Anordnung zur Synchronisierung der Außeneinheiten einer Funkalarmanlage mit der Zentraleinheit
DE19506385C2 (de) Drahtlose Gefahren-Meldeanlage und Meldeverfahren
DE4243026C2 (de) Funkalarmanlage mit asynchroner Übermittlung von Meldungen über Zeitkanäle unterschiedlicher Periodendauern
DE3342431A1 (de) Ueberwachungsanlage
DE3921658A1 (de) Automatisches schutzsystem
EP0742539B1 (fr) Système radio d'alarme
EP0660285B1 (fr) Procédé pour l'élévation de la sécurité contre les pertubations dans un système radio d'alarme
EP0654769B1 (fr) Dispositif pour la mise en veille d'un système radio d'alarme
DE19539312A1 (de) Verfahren zur Erhöhung der Übertragungssicherheit bei Funkalarmanlagen
EP0547458B1 (fr) Système radio d'alarme
DE4337211C1 (de) Funkalarmanlage mit einer Funkstrecke zwischen den Außenstationen und der Zentraleinheit einer Alarmanlage
DE2815183A1 (de) Alarm-, sicherungs- und ueberwachungsanlage
DE4408268C2 (de) Verfahren zur Erhöhung der Störsicherheit einer Funkalarmanlage
EP0651362B1 (fr) Système radio d'alarme à plusieurs canaux à transmission à saut de fréquence
DE19539989C1 (de) Alarmanlage mit erhöhter Störsicherheit
DE4242973C2 (de) Funkalarmanlage mit einer Vielzahl von nach dem Code-Multiplexverfahren gebildeten Nachrichtenkanälen
DE4335815C2 (de) Funkalarmanlage
DE4417632C2 (de) Verfahren zum Betreiben einer Funkalarmanlage
EP2605229B1 (fr) Système d'alarme d'incendie et méthode pour l'utilisation d'un système d'alarme d'incendie
DE2928492C2 (de) Verfahren zur Überwachung von mehreren, Stationen verbindende Leitungen für Fernwirkmaschennetze
WO2017025316A1 (fr) Dispositif et procédé de contrôle d'une transmission de données dans un réseau de données
EP0349967A1 (fr) Procédé de transmission de données entre différents stations

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT CH DE FR GB IT LI

17P Request for examination filed

Effective date: 19951202

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: GRUNDIG E.M.V. ELEKTRO-MECHANISCHE VERSUCHSANSTALT

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: GRUNDIG AKTIENGESELLSCHAFT

17Q First examination report despatched

Effective date: 19980812

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT CH DE FR GB IT LI

REF Corresponds to:

Ref document number: 189550

Country of ref document: AT

Date of ref document: 20000215

Kind code of ref document: T

REG Reference to a national code

Ref country code: CH

Ref legal event code: EP

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)

Effective date: 20000202

REF Corresponds to:

Ref document number: 59409121

Country of ref document: DE

Date of ref document: 20000309

ET Fr: translation filed
ITF It: translation for a ep patent filed

Owner name: STUDIO JAUMANN P. & C. S.N.C.

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: AT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20001124

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20001130

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20001130

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

REG Reference to a national code

Ref country code: GB

Ref legal event code: 746

Effective date: 20001109

RAP2 Party data changed (patent owner data changed or rights of a patent transferred)

Owner name: GRUNDIG AKTIENGESELLSCHAFT

REG Reference to a national code

Ref country code: FR

Ref legal event code: D6

26N No opposition filed
REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

REG Reference to a national code

Ref country code: GB

Ref legal event code: IF02

REG Reference to a national code

Ref country code: GB

Ref legal event code: 732E

REG Reference to a national code

Ref country code: FR

Ref legal event code: TP

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20131122

Year of fee payment: 20

Ref country code: GB

Payment date: 20131120

Year of fee payment: 20

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: IT

Payment date: 20131121

Year of fee payment: 20

Ref country code: FR

Payment date: 20131118

Year of fee payment: 20

REG Reference to a national code

Ref country code: DE

Ref legal event code: R071

Ref document number: 59409121

Country of ref document: DE

REG Reference to a national code

Ref country code: GB

Ref legal event code: PE20

Expiry date: 20141123

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF EXPIRATION OF PROTECTION

Effective date: 20141123