EP1244082B1 - method of radio communication in an alarm system - Google Patents
method of radio communication in an alarm system Download PDFInfo
- Publication number
- EP1244082B1 EP1244082B1 EP02006119A EP02006119A EP1244082B1 EP 1244082 B1 EP1244082 B1 EP 1244082B1 EP 02006119 A EP02006119 A EP 02006119A EP 02006119 A EP02006119 A EP 02006119A EP 1244082 B1 EP1244082 B1 EP 1244082B1
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- European Patent Office
- Prior art keywords
- main station
- alarm system
- radio transmission
- substation
- antenna
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- 238000000034 method Methods 0.000 title claims description 29
- 230000005540 biological transmission Effects 0.000 claims abstract description 32
- 230000010287 polarization Effects 0.000 claims description 2
- 238000005562 fading Methods 0.000 description 7
- 238000001514 detection method Methods 0.000 description 6
- 230000011664 signaling Effects 0.000 description 3
- 230000002457 bidirectional effect Effects 0.000 description 2
- 239000006185 dispersion Substances 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
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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
- G08B17/00—Fire alarms; Alarms responsive to explosion
Definitions
- the invention relates to a method for radio transmission in a hazard detection system with a main station and several slave stations, the main station and the slave station each have a transmitting and receiving device.
- the hazard detection systems include signaling sensors as secondary stations, the one in the event of a detected danger (fire, burglary) Hazard notification via a radio link to a control center or main station (which also includes repeaters should transmit) in the further to eliminate the danger Measures (alerting the fire department or the police) be initiated.
- the signal sensors each include a transmitting and receiving device and are intended for use as self-sufficient as possible in inadequate places, i.e. with a Battery.
- EP 0 911 775 is a hazard detection system and a method for radio transmission in such a system known which is bidirectional and its components are designed to save energy. Disorders in one Such systems can be safely recognized in less than 100 s fading holes lead to unnecessary Fault messages.
- a partial solution is achieved by increasing the sensitivity Recipient. This reduces the likelihood of interference but never disappears completely. That leaves In large systems in particular, there is always a certain probability of failure.
- a wireless alarm system is known from DE 197 00 716 A1, where each outdoor station is designed as an alarm station, which represents its own alarm center. All alarm stations are connected and monitor each other. If an alarm cannot be triggered, it will automatically issued by another alarm station - this Procedure is due to the complexity of the individual alarm stations very complex and the individual alarm stations are therefore difficult to operate independently.
- a radio controlled signaling and receiving system is also known from DE 296 01 436 U1.
- the directional characteristic of at least one the antennas changed.
- Another easy to implement method according to claim 5 is that at the location of the recipient and or the transmitter is switched to another antenna according to claim 6 by more than half the wavelength of the original antenna staggered, according to claim 7 by a different orientation than the original one Antenna or according to claim 8 by a compared to the first Antenna rotated polarization direction is marked.
- the slave station can then via the other slave station report to the main station that this - the main station not reaching - slave station still working and from the main station via the other slave station can be achieved.
- the slave station sends its data for so long over the further secondary station to the main station, as long the direct connection to the main station is disturbed.
- a detour can not only be done once, but continuously use for communication between main and secondary station.
- FIG. 1 shows how a main station N, for example the headquarters of a hazard detection system or a Repeater, communicates with a secondary station S1.
- the substation S1 can, for example, intrusion or fire alarm sensors include.
- the main station M and the secondary stations S1 each have transmit and not shown Receivers on wireless communication initially between the main station M and the secondary stations S1 guarantee.
- the secondary station S1 has a first Antenna 1 has another antenna 3, which is referred to in FIG Example spatially offset and perpendicular to the first antenna 1 is arranged. If the communication between the first Antenna 1 and antenna 2 of the main station M disturbed is what in turn is represented by the dotted connection , the additional antenna 3 to be switched, which will then communicate with the antenna 2 of the main station M enables.
- the respective Antennas assigned to stations can also be arranged at the main station M. and by means of an appropriate control, the respective Antennas assigned to stations not only alternately, but also be operated at the same time, which makes the Allow dispersion conditions to be changed even more flexibly.
- FIG. 2 it is shown that in an arrangement with a main station M and a total of four secondary stations S1, S2, S3 and S4 the communication between the main station M and the secondary station S1 is disturbed, which is shown schematically in FIG. 2 through a dotted connection between the secondary station S1 and the main station M is shown.
- the secondary station S1 sends its data to the further secondary station S2 and this transmits the data of the secondary station S1 then to the main station M.
- the main station M can thus via the detour via the other secondary station S2 with the accessible secondary station S1 communicate and exchange data.
- the secondary station S1 is therefore in the main station M. not marked as disturbed.
- the number can be significantly reduce the number of fault reports.
- FIG. 3 shows how the secondary station S1 and the Main station M does not communicate with each other via a first frequency F1 can communicate, which in turn by the dotted line is shown while communicating via a second Frequency S2 is easily possible.
- a frequency change can be provided, for example, when the communication is disturbed with the first frequency S1, but it can also a continuous change in frequency at predetermined time intervals be provided.
- the detour circuit via another slave station the change the antennas and the frequency change can now do so combined that if one of the ways doesn't work, one of the others is automatically applied.
- the communication between the main station and the slave station disturbed differently can be.
- the main station receives in the frame the integrity check at the given time none Signal from the slave, then try the master and slave to communicate with each other on another frequency. If communication via frequency change is unsuccessful, then the main station can communicate through the diversion trigger via the additional slave station.
- the main station receives the signal received by the slave station for integrity checking and sends your acknowledgment signal, which is not from the secondary station Will be received.
- the substation try to reach the main station in a different way while the main station assumes communication be properly completed.
- there is a Extra time slot is provided in which a slave station that has not received an acknowledgment signal and no other communication with the main station, a telegram transmitted to the main station. This receives this Telegram in the time slot provided for this, thus learns that the integrity check was not completed and can initiate additional measures, such as communication via another secondary station.
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- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Mobile Radio Communication Systems (AREA)
- Alarm Systems (AREA)
Abstract
Description
Die Erfindung bezieht sich auf ein Verfahren zur Funkübertragung in einem Gefahrenmeldesystem mit einer Hauptstation und mehreren Nebenstationen, wobei die Hauptstation und die Nebenstation jeweils eine Sende- und Empfangseinrichtung aufweisen.The invention relates to a method for radio transmission in a hazard detection system with a main station and several slave stations, the main station and the slave station each have a transmitting and receiving device.
Gefahrenmeldesysteme, bei denen Meldungen über Funk übertragen werden, bieten dem Anwender viele Vorteile. Die Gefahrenmeldesysteme umfassen dabei Meldesensoren als Nebenstationen, die im Fall einer detektierten Gefahr (Brand, Einbruch) eine Gefahrenmeldung über eine Funkverbindung an eine Zentrale oder Hauptstation (worunter auch Repeater verstanden werden sollen) übermitteln, in der zur Beseitigung der Gefahr weitere Maßnahmen (Alarmierung der Feuerwehr bzw. der Polizei) eingeleitet werden. Die Meldesensoren umfassen dabei jeweils eine Sende- und Empfangseinrichtung und sollen für einen Einsatz an unzulänglichen Orten möglichst autark, d.h. mit einer Batterie, betrieben werden.Hazard detection systems in which messages are transmitted via radio offer the user many advantages. The hazard detection systems include signaling sensors as secondary stations, the one in the event of a detected danger (fire, burglary) Hazard notification via a radio link to a control center or main station (which also includes repeaters should transmit) in the further to eliminate the danger Measures (alerting the fire department or the police) be initiated. The signal sensors each include a transmitting and receiving device and are intended for use as self-sufficient as possible in inadequate places, i.e. with a Battery.
Aus EP 0 911 775 ist beispielsweise ein Gefahrenmeldesystem und ein Verfahren zur Funkübertragung in einem solchen System bekannt, welches bidirektional aufgebaut ist und dessen Komponenten energiesparend ausgelegt sind. Störungen in einem solchen System können in weniger als 100 s sicher erkannt werden, allerdings führen sog. Fading-Löcher zu unnötigen Störungsmeldungen.EP 0 911 775, for example, is a hazard detection system and a method for radio transmission in such a system known which is bidirectional and its components are designed to save energy. Disorders in one Such systems can be safely recognized in less than 100 s fading holes lead to unnecessary Fault messages.
Für kleine Anlage sind diese Phänomene fast bedeutungslos. Zum einen gilt für sie eine Vorschrift, die statt 100 s vier Stunden zuläßt. Zum anderen stört es nicht sehr, wenn bei zum Beispiel drei Meldern im System alle drei Jahre eine von selbst vorübergehende Störung, wie sie bei Fading-Löchern auftritt, vorhanden ist. These phenomena are almost meaningless for small systems. On the one hand, one rule applies to them, four instead of 100 s Hours. On the other hand, it doesn't really bother if at Example three detectors in the system one every three years even temporary disruption, as is the case with fading holes occurs, is present.
Eine Teillösung wird erzielt durch eine Steigerung der Empfindlichkeit des Empfängers. Damit sinkt die Störungswahrscheinlichkeit ab, verschwindet aber nie ganz. Somit verbleibt gerade bei großen Anlagen immer eine bestimmte Störungswahrscheinlichkeit.A partial solution is achieved by increasing the sensitivity Recipient. This reduces the likelihood of interference but never disappears completely. That leaves In large systems in particular, there is always a certain probability of failure.
Eine weitere Lösung des Problems besteht darin, die Empfangsstationen zu verdoppeln oder zu verdreifachen. Diese, als Empfänger- oder Raumdiversity bezeichnete Variante ist ohne Zweifel wirkungsvoll. Sie zieht jedoch einen erheblichen Aufwand nach sich und kommt deshalb nur in Frage, wenn die Geräte- und Montagekosten von untergeordneter Bedeutung sind.Another solution to the problem is the receiving stations to double or triple. This, as Variant designated receiver or room diversity is without Doubt effective. However, it takes a lot of effort and therefore only comes into question if the device and assembly costs are of minor importance.
Aus DE 195 39 312 A12 ist ein Verfahren zur Erhöhung der Übertragungssicherheit bei Funkalarmanlagen bekannt, welches vorsieht, daß in fest vorgegebenen Zeitabständen spezielle Datentelegramme als Statusmeldung von einer Außeneinheit an eine Zentraleinheit gesendet werden und außerdem Probleme des Mehrwegeempfangs aufgrund einer räumlich versetzten Positionierung der Antennen einer Einheit vermindert. In gewissen ungünstigen Anordnungen lassen sich die Mehrwegeempfangsprobleme dadurch nicht lösen.DE 195 39 312 A12 describes a method for increasing the Transmission security in radio alarm systems known, which provides that special at predetermined intervals Data telegrams as status messages from an outdoor unit a central unit to be sent and also problems of Multi-way reception due to a spatially offset positioning the antennas of a unit are reduced. In certain unfavorable arrangements can solve the multipath reception problems don't solve it.
Aus DE 197 00 716 A1 ist eine drahtlose Alarmanlage bekannt, bei der jede Außenstation als Alarmstation ausgebildet ist, die eine eigene Alarmzentrale darstellt. Alle Alarmstationen stehen untereinander in Verbindung und überwachen sich gegenseitig. Kann ein Alarm nicht abgesetzt werden, wird dieser automatisch von einer anderen Alarmstation abgegeben- Dieses Verfahren ist aufgrund der Komplexität der einzelnen Alarmstationen sehr aufwendig und die einzelnen Alarmstationen sind daher auch schlecht autark betreibbar.A wireless alarm system is known from DE 197 00 716 A1, where each outdoor station is designed as an alarm station, which represents its own alarm center. All alarm stations are connected and monitor each other. If an alarm cannot be triggered, it will automatically issued by another alarm station - this Procedure is due to the complexity of the individual alarm stations very complex and the individual alarm stations are therefore difficult to operate independently.
Eine funkgesteuerte Signalmelde- und Empfangsanlage ist ebenfalls aus DE 296 01 436 U1 bekannt. Dabei sind Zwischenstationen vorgesehen, über die ein von einer Signalmeldeeinheit ausgesandtes Signal an eine Signalempfangseinheit weitervermittelt wird. Außer der Weitervermittlung sind keine Funktionen der Zwischenstationen offenbart.A radio controlled signaling and receiving system is also known from DE 296 01 436 U1. There are intermediate stations provided, via which a signaling unit transmitted signal forwarded to a signal receiving unit becomes. There are no functions other than transfer the intermediate stations disclosed.
Aus EP 0 811 959 ist eine drahtlose Alarmanlage mit einer Hauptstation und mehreren Nebenstationen bekannt.From EP 0 811 959 a wireless alarm system with a Main station and several secondary stations known.
Es ist daher die Aufgabe der Erfindung, ein Verfahren zur Funkübertragung in Gefahrenmeldesystemen anzugeben, welches kostengünstig arbeitet und dennoch die Störungsquote wegen des Auftretens von Fading-Löchern reduziert.It is therefore the object of the invention to provide a method for Radio transmission in hazard detection systems indicate which works inexpensively and still because of the failure rate the occurrence of fading holes is reduced.
Die Aufgabe wird erfindungsgemäß gelöst durch ein Verfahren mit den Merkmalen des Anspruchs 1.The object is achieved according to the invention by a method with the features of claim 1.
Dabei ist vorgesehen, daß die Sende- und/oder Empfangseigenschaften der Antennen der Haupt- und/oder der nicht erreichbaren Nebenstation beeinflußt werden, da sich dadurch die Ausbreitungsverhältnisse zwischen Haupt- und nicht erreichbarer Nebenstation verändern und somit ein Fading-Loch überwunden werden kann. Vor allem in Gebäude, wo es keine Sichtverbindungen zwischen Haupt- und Nebenstation gibt, gewinnen Reflexionen einen entscheidenden Einfluß. Diese immer mehrfach auftretenden Reflexionen führen dazu, daß sich deren Signale am Ort der Empfangsantenne so interferieren, daß sich diese auslöschen. Ändern sich nun am Sender oder am Empfänger die Phasenverhältnisse, so ändern sich die Ausbreitungswege, d.h. die Länge der einzelnen Umwege durch Reflexionen. Daraus resultieren dann andere Empfangspegel. Gelingt auf diese Weise keine Kommunikation zwischen Haupt- und Nebenstation, so wird ausgenutzt, daß in der Regel Fading-Löcher nur die Kommunikation zwischen zwei Sende- und Empfangseinrichtungen beeinträchtigen. Ist nun die Kommunikation zwischen einer Hauptstation und einer Nebenstation gestört, so sind in der Regel die Kommunikationen zwischen der Hauptstation und anderen Nebenstationen wie auch zwischen einzelnen Nebenstationen untereinander dennoch problemlos möglich. Daher wird dann eine Nebenstation ihre Daten über eine weitere Nebenstation an die Hauptstation senden. It is provided that the transmission and / or reception properties the antennas of the main and / or the unreachable Subsidiary station are affected, because this Spreading relationships between main and unreachable Change slave station and thus overcome a fading hole can be. Especially in buildings where there is no line of sight there are reflections between the main and secondary stations a decisive influence. This always several times occurring reflections lead to their signals interfere at the location of the receiving antenna so that it extinguish. Now change the sender or receiver Phase relationships, the propagation paths change, i.e. the length of each detour through reflections. Result from it then other reception levels. It works this way no communication between main and secondary station, so exploited that fading holes usually only communication between two transmitting and receiving devices. Now is the communication between a main station and a slave station are usually disturbed the communications between the master station and other slave stations as well as between individual substations still possible without any problems. Therefore, then Slave station to send its data to the Send main station.
In der vorteilhaften Ausgestaltung des Verfahrens nach Anspruch 2 wird dazu die Richtcharakteristik von mindestens einer der Antennen verändert.In the advantageous embodiment of the method according to claim 2 the directional characteristic of at least one the antennas changed.
Dies kann in einfacher Weise durch Zu- oder Abschalten einzelnen
Antennenteile gemäß Anspruch 3, oder durch Variation
der Abgleichelemente der Antenne gemäß Anspruch 4 geschehen.This can be done easily by switching individual on or off
Antenna parts according to
Ein weiteres einfach zu realisierendes Verfahren gemäß Anspruch 5 besteht darin, daß am Ort des Empfängers und oder des Senders auf eine weitere Antenne umgeschaltet wird, die gemäß Anspruch 6 um mehr als die Hälfte der Wellenlänge von der ursprünglichen Antenne versetzt angeordnet, gemäß Anspruch 7 durch eine andere Ausrichtung als die ursprüngliche Antenne oder gemäß Anspruch 8 durch eine gegenüber der ersten Antenne gedrehte Polarisationsrichtung gekennzeichnet ist.Another easy to implement method according to claim 5 is that at the location of the recipient and or the transmitter is switched to another antenna according to claim 6 by more than half the wavelength of the original antenna staggered, according to claim 7 by a different orientation than the original one Antenna or according to claim 8 by a compared to the first Antenna rotated polarization direction is marked.
Besonders gravierend sind die Veränderungen der Ausbreitungsverhältnisse, wenn die weitere Antenne gemäß Anspruch 9 im wesentlichen senkrecht zur ursprünglichen Antenne ausgerichtet ist.The changes in the spreading conditions are particularly serious, if the further antenna according to claim 9 in aligned substantially perpendicular to the original antenna is.
In der vorteilhaften Ausgestaltung des Verfahrens nach Anspruch 10 wird ein solches Fading-Loch zwischen einer Hauptstation und einer Nebenstation im Rahmen einer Routineprüfung erkannt, die Nebenstation kann dann über die weitere Nebenstation an die Hauptstation melden, daß diese - die Hauptstation nicht erreichende - Nebenstation nach wie vor funktionsfähig ist und von der Hauptstation aus über die weitere Nebenstation erreicht werden kann.In the advantageous embodiment of the method according to claim 10 becomes such a fading hole between a main station and a slave station as part of a routine check recognized, the slave station can then via the other slave station report to the main station that this - the main station not reaching - slave station still working and from the main station via the other slave station can be achieved.
Gemäß Anspruch 11 wird eine solche, nicht direkt, aber über Umwege erreichbare Nebenstation als nicht gestört geführt, so daß sich die Anzahl der Störungsmeldungen entscheidend reduzieren läßt. According to claim 11, such, not directly, but over Detourable secondary station managed as not disturbed, see above that the number of fault reports is significantly reduced leaves.
Nach Anspruch 12 sendet die Nebenstation ihre Daten so lange über die weitere Nebenstation an die Hauptstation, so lange die direkte Verbindung zur Hauptstation gestört ist. Dadurch läßt sich ein solcher Umweg nicht nur einmalig, sondern ständig zur Kommunikation zwischen Haupt- und Nebenstation verwenden.According to claim 12, the slave station sends its data for so long over the further secondary station to the main station, as long the direct connection to the main station is disturbed. Thereby such a detour can not only be done once, but continuously use for communication between main and secondary station.
Da eine Frequenzänderung häufig die effektivste Methode ist, eine Verbindung zwischen Haupt- und Nebenstation herzustellen, ist es gemäß Anspruch 13 in vorteilhafter Weise vorgesehen, zunächst die Frequenz der Übertragung zwischen Hauptund Nebenstation zu verändern und erst bei einem Fehlschlagen dieser Methode die Umleitung über eine weitere Nebenstation einzusetzen.Since frequency change is often the most effective method establish a connection between the main and secondary station, it is advantageously provided according to claim 13, first the frequency of the transmission between main and Change substation and only if it fails this method, the diversion via another secondary station use.
Eine zusätzliche Veränderung der Ausbreitungsverhältnisse zwischen Sender und Empfänger läßt sich gemäß Verfahren gemäß der vorteilhaften Ausgestaltung des Verfahrens nach Anspruch 14 dadurch erzielen, daß die Frequenz der Übertragung geändert wird. Dadurch verändern sich die Wege der Wellen etwas und diese werden anders interferiert. Eine Variation innerhalb des 2 MHz breiten SRD-Bandes (868 MHz bis 870 MHz) reicht aus, um die Phase um mehr als 10° auf dem Übertragungsweg zu schieben.An additional change in the spreading conditions between sender and receiver can be according to the procedure the advantageous embodiment of the method according to claim 14 achieve by changing the frequency of transmission becomes. As a result, the paths of the waves change somewhat and these are interfered differently. A variation within the 2 MHz wide SRD band (868 MHz to 870 MHz) is sufficient to move the phase by more than 10 ° to push.
Um von vornherein den Einfluß der Frequenzveränderung zu nutzen, ist es ebenfalls sinnvoll, die Frequenz der Übertragung in vorgegebenen Zeitabständen zu verändern gemäß Anspruch 15, ohne vorher auf das Auftreten von Fading-Löchern zu warten.In order to use the influence of the frequency change from the start, it also makes sense to change the frequency of the transmission to change at predetermined time intervals according to claim 15, without waiting for fading holes to appear.
Anhand der in den Figuren dargestellten Ausführungsbeispiele
wird die Erfindung näher erläutert. Dabei zeigt
In Figur 1 ist dargestellt, wie eine Hauptstation N, beispielsweise
die Zentrale eines Gefahrenmeldesystems oder ein
Repeater, mit einer Nebenstation S1 kommuniziert. Die Nebenstation
S1 kann dabei beispielsweise Intrusions- oder Brandmeldesensoren
umfassen. Die Hauptstation M und die Nebenstationen
S1 weisen dabei jeweils nicht dargestellte Sende- und
Empfangseinrichtungen auf, die eine drahtlose Kommunikation
zunächst zwischen Hauptstation M und der Nebenstationen S1
gewährleisten. Die Nebenstation S1 weist neben einer ersten
Antenne 1 eine weitere Antenne 3 auf, die im bezeichneten
Beispiel räumlich versetzt und senkrecht zur ersten Antenne 1
angeordnet ist. Falls nun die Kommunikation zwischen der ersten
Antenne 1 und der Antenne 2 der Hauptstation M gestört
ist, was wiederum durch die gepunktete Verbindung dargestellt
ist, so kann in der Nebenstation S1 auf die weitere Antenne 3
umgeschaltet werden, die dann die Kommunikation mit der Antenne
2 der Hauptstation M ermöglicht. Natürlich kann die
weitere Antenne auch an der Hauptstation M angeordnet sein
und durch eine entsprechende Steuerung können die den jeweiligen
Stationen zugeordneten Antennen nicht nur wechselweise,
sondern auch gleichzeitig betrieben werden, wodurch sich die
Ausbreitungsbedingungen noch flexibler verändern lassen.FIG. 1 shows how a main station N, for example
the headquarters of a hazard detection system or a
Repeater, communicates with a secondary station S1. The substation
S1 can, for example, intrusion or fire alarm sensors
include. The main station M and the secondary stations
S1 each have transmit and not shown
Receivers on wireless communication
initially between the main station M and the secondary stations S1
guarantee. The secondary station S1 has a first
Antenna 1 has another
In Figur 2 ist dargestellt, dass die in einer Anordnung mit einer Hauptstation M und insgesamt vier Nebenstation S1, S2, S3 und S4 die Kommunikation zwischen der Hauptstation M und der Nebenstation S1 gestört ist, was schematisch in Figur 2 durch eine gepunktete Verbindung zwischen der Nebenstation S1 und der Hauptstation M dargestellt ist. In diesem Fall kommuniziert die Nebenstation S1 ihre Daten an die weitere Nebenstation S2 und diese übermittelt die Daten der Nebenstation S1 dann an die Hauptstation M. Die Hauptstation M kann somit über den Umweg über die weitere Nebenstation S2 mit der nicht erreichbaren Nebenstation S1 kommunizieren und Daten austauschen. Die Nebenstation S1 ist daher in der Hauptstation M nicht als gestört gekennzeichnet. Somit läßt sich die Anzahl der Störungsmeldungen entscheidend reduzieren.In Figure 2 it is shown that in an arrangement with a main station M and a total of four secondary stations S1, S2, S3 and S4 the communication between the main station M and the secondary station S1 is disturbed, which is shown schematically in FIG. 2 through a dotted connection between the secondary station S1 and the main station M is shown. In this case communicates the secondary station S1 sends its data to the further secondary station S2 and this transmits the data of the secondary station S1 then to the main station M. The main station M can thus via the detour via the other secondary station S2 with the accessible secondary station S1 communicate and exchange data. The secondary station S1 is therefore in the main station M. not marked as disturbed. Thus the number can be significantly reduce the number of fault reports.
In Figur 3 ist dargestellt, wie die Nebenstation S1 und die Hauptstation M über eine erste Frequenz F1 nicht miteinander kommunizieren können, was wiederum durch die gepunktete Linie dargestellt ist, während die Kommunikation über eine zweite Frequenz S2 problemlos möglich ist. Ein solcher Frequenzwechsel kann beispielsweise vorgesehen sein, wenn die Kommunikation mit der ersten Frequenz S1 gestört ist, aber es kann auch eine in vorgegebenen Zeitabständen kontinuierliche Frequenzänderung vorgesehen sein.FIG. 3 shows how the secondary station S1 and the Main station M does not communicate with each other via a first frequency F1 can communicate, which in turn by the dotted line is shown while communicating via a second Frequency S2 is easily possible. Such a frequency change can be provided, for example, when the communication is disturbed with the first frequency S1, but it can also a continuous change in frequency at predetermined time intervals be provided.
Die Umwegschaltung über eine weitere Nebenstation, die Änderung der Antennen sowie die Frequenzänderung können nun so kombiniert werden, daß, falls einer der Wege nicht funktioniert, automatisch einer der anderen angewendet wird. Bei bidirektionalen Systemen ist es empfehlenswert, zunächst einen Frequenzwechsel vorzunehmen. Nutzt dieser Frequenzwechsel nichts, dann sollte der Umweg über die weitere Nebenstation gewählt werden, um die Ausbreitungsverhältnisse der anderen Kommunikationen zwischen der Hauptstation M und den weiteren Nebenstationen S2, S3 und S4 nicht zu beeinflussen.The detour circuit via another slave station, the change the antennas and the frequency change can now do so combined that if one of the ways doesn't work, one of the others is automatically applied. With bidirectional Systems, it is recommended to start with one Frequency change. Use this frequency change nothing, then the detour should go to the other substation be chosen to the spreading ratios of others Communications between the main station M and the others Slave stations S2, S3 and S4 not to be influenced.
Zusätzlich ist zu beachten, dass die Kommunikation zwischen der Hauptstation und der Nebenstation unterschiedlich gestört sein kann. Empfängt die Hauptstation beispielsweise im Rahmen der Integritäts-Überprüfung zum vorgegebenen Zeitpunkt kein Signal von der Nebenstation, dann versuchen Haupt- und Nebenstation auf einer anderen Frequenz miteinander zu kommunizieren. Gelingt eine Kommunikation über Frequenzwechsel nicht, dann kann die Hauptstation die Kommunikation über die Umleitung über die weitere Nebenstation auslösen. It should also be noted that the communication between the main station and the slave station disturbed differently can be. For example, the main station receives in the frame the integrity check at the given time none Signal from the slave, then try the master and slave to communicate with each other on another frequency. If communication via frequency change is unsuccessful, then the main station can communicate through the diversion trigger via the additional slave station.
Schwieriger ist der Fall, dass die Hauptstation das Signal von der Nebenstation zur Integritäts-Überprüfung empfängt und ihr Quittungssignal aussendet, welches nicht von der Nebenstation empfangen wird. In diesem Fall wird die Nebenstation versuchen, die Hauptstation auf einem anderen Weg zu erreichen, während die Hauptstation davon ausgeht, die Kommunikatio sei ordnungsgemäß abgeschlossen. Für diesen Fall ist ein Extra-Zeitschlitz vorgesehen, in dem eine Nebenstation, die kein Quittungssignal empfangen hat und auch sonst keine Kommunikation mit der Hauptstation aufbauen konnte, ein Telegramm an die Hauptstation übermittelt. Diese empfängt dieses Telegramm im dafür vorgesehenen Zeitschlitz, erfährt somit, dass die Integritäts-Überprüfung nicht abgeschlossen war und kann zusätzliche Maßnahmen einleiten, beispielsweise die Kommunikation über eine weitere Nebenstation.More difficult is the case where the main station receives the signal received by the slave station for integrity checking and sends your acknowledgment signal, which is not from the secondary station Will be received. In this case the substation try to reach the main station in a different way while the main station assumes communication be properly completed. In this case there is a Extra time slot is provided in which a slave station that has not received an acknowledgment signal and no other communication with the main station, a telegram transmitted to the main station. This receives this Telegram in the time slot provided for this, thus learns that the integrity check was not completed and can initiate additional measures, such as communication via another secondary station.
Claims (15)
- Method for radio transmission in an alarm system with a main station (M) and two or more substations (S1, S2, S3, S4), with the main station (M) and the substations (S1, S2, S3, S4) each having a transmitting and receiving device, in which
each substation (S1, S2, S3, S4) attempts to send the data by radio directly to the main station (M),
and if the direct radio transmission between the main station (M) and one of the substations (S1) is subject to interference or is faulty,
transmission and/or reception characteristics of the antennas (1, 2, 3) of the transmitting and receiving devices of the main station (M) and/or of the substation (S1) which does not reach the main station (M) are influenced,
and in that the substation (S1) which does not reach the main station (M) sends its data to a further substation (S2), and this further substation (S2) transmits this data to the main station (M) if the influencing of the antennas (1, 2, 3) is not successful. - Method for radio transmission in an alarm system according to Claim 1,
characterized in that
the directional characteristic of at least one of the antennas (1, 2, 3) is varied. - Method for radio transmission in an alarm system according to Claim 2,
characterized in that
the directional characteristic is varied by connecting or disconnecting individual antenna parts (1, 2, 3). - Method for radio transmission in an alarm system according to Claim 2,
characterized in that
the directional characteristic is varied by varying the tuning elements of the antenna (1, 2, 3). - Method for radio transmission in an alarm system according to Claim 1,
characterized in that
a further antenna (3) is switched over at the location of the receiver and/or of the transmitter. - Method for radio transmission in an alarm system according to Claim 5,
characterized in that
the further antenna (3) is arranged physically offset by more than half the wavelength away from the original antenna (1). - Method for radio transmission in an alarm system according to Claim 5,
characterized in that
the further antenna (3) points in a different direction to that of the original antenna (1). - Method for radio transmission in an alarm system according to Claim 5,
characterized in that
the further antenna (3) has a polarization direction which is rotated with respect to that of the first antenna (1). - Method for radio transmission in an alarm system according to one of Claims 5 to 8,
characterized in that
the further antenna (3) is aligned essentially at right angles to the original antenna (1). - Method for radio transmission in an alarm system according to one of Claims 1 to 9,
characterized in that
the main station (M) and the substations (S1, S2, S3, S4) attempt to communicate with one another at predetermined time intervals with respect to one another in the course of an integrity check,
in that the substation (S1) which does not reach the main station (M) and for which the integrity check does not work signals to the main station (M) via the further substation (S2) that it is serviceable and can be reached from the main station (M) via the further substation (S2). - Method for radio transmission in an alarm system according to one of Claims 1 to 10,
characterized in that
the main station (M) treats the substation (S1) which does not reach the main station (M) as not being faulty. - Method for radio transmission in an alarm system according to one of Claims 1 to 11,
characterized in that
the substation (S1) which does not reach the main station (M) sends its data via the further substation (S2) to the main station (M) for as long as the direct link to the main station (M) is subject to interference or is faulty. - Method for radio transmission in an alarm system according to one of Claims 1 to 12,
characterized in that
an attempt is first of all made to set up the transmission between the substation (S1) and the main station (M) by changing the frequency over a predetermined number of frequency channels, before the influencing of the antennas (1, 2, 3) is initiated. - Method for radio transmission in an alarm system according to one of Claims 1 to 12,
characterized in that
the frequency of the transmission is changed from a first frequency (f1) to a second frequency (f2) if the first frequency (f1) does not result either in transmission via the further substation (S1) or in transmission by influencing the antenna (1, 2, 3). - Method for radio transmission in an alarm system according to one of Claims 1 to 14,
characterized in that
the frequency of the transmission is changed from a first frequency (f1) to a second frequency (f2) at predetermined time intervals.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE10114314A DE10114314A1 (en) | 2001-03-23 | 2001-03-23 | Method for radio transmission in a hazard detection system |
| DE10114314 | 2001-03-23 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1244082A1 EP1244082A1 (en) | 2002-09-25 |
| EP1244082B1 true EP1244082B1 (en) | 2004-01-14 |
Family
ID=7678738
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP02006119A Expired - Lifetime EP1244082B1 (en) | 2001-03-23 | 2002-03-18 | method of radio communication in an alarm system |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP1244082B1 (en) |
| AT (1) | ATE257966T1 (en) |
| DE (2) | DE10114314A1 (en) |
| ES (1) | ES2214456T3 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102010032368B4 (en) | 2010-07-27 | 2017-04-06 | Lotfi Makadmini | Full-duplex radio communication method in a synchronous radio system |
| DE102010032349B4 (en) | 2010-07-27 | 2013-02-07 | Lotfi Makadmini | Radio communication method with fast alarm notification |
| WO2012013692A1 (en) | 2010-07-27 | 2012-02-02 | Lotfi Makadmini | Full duplex radio communication method in a synchronous radio system of an alarm system |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4338606A (en) * | 1978-12-21 | 1982-07-06 | Sony Corporation | Antenna system with variable directivity |
| US4792946A (en) * | 1987-04-07 | 1988-12-20 | Spectrum Electronics, Inc. | Wireless local area network for use in neighborhoods |
| DE19539312A1 (en) * | 1995-10-23 | 1997-04-24 | Grundig Emv | Procedure for increasing the transmission security in radio alarm systems |
| DE29601436U1 (en) * | 1996-01-29 | 1996-04-18 | Impex Gesellschaft für elektronische Alarmanlagen mbH, 47441 Moers | Radio-controlled signaling and receiving system |
| DE19622880A1 (en) * | 1996-06-07 | 1997-12-11 | Grundig Ag | Radio-controlled hazard detection system with sub-central and secure data communication between the individual components |
| DE19700716A1 (en) * | 1997-01-11 | 1997-06-05 | Hauk Rolf Guenter | Alarm system with spread=spectrum modulation method |
| ATE256324T1 (en) * | 1997-09-30 | 2003-12-15 | Siemens Ag | METHOD FOR RADIO TRANSMISSION IN A HAZARD NOTIFICATION SYSTEM |
| US6201472B1 (en) * | 1998-10-26 | 2001-03-13 | Pittway Corp. | Wireless communication system with increased dynamic range |
| DE19924349A1 (en) * | 1999-05-27 | 2000-12-21 | Kathrein Werke Kg | Mobile antenna, in particular vehicle antenna for at least one circular and at least one linear, preferably vertical polarization |
-
2001
- 2001-03-23 DE DE10114314A patent/DE10114314A1/en not_active Withdrawn
-
2002
- 2002-03-18 AT AT02006119T patent/ATE257966T1/en active
- 2002-03-18 ES ES02006119T patent/ES2214456T3/en not_active Expired - Lifetime
- 2002-03-18 EP EP02006119A patent/EP1244082B1/en not_active Expired - Lifetime
- 2002-03-18 DE DE50200209T patent/DE50200209D1/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| DE10114314A1 (en) | 2002-10-10 |
| DE50200209D1 (en) | 2004-02-19 |
| ATE257966T1 (en) | 2004-01-15 |
| EP1244082A1 (en) | 2002-09-25 |
| ES2214456T3 (en) | 2004-09-16 |
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