WO2008015124A1 - Gestion de canal pour réseaux de radiocommunication asynchrones - Google Patents

Gestion de canal pour réseaux de radiocommunication asynchrones Download PDF

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Publication number
WO2008015124A1
WO2008015124A1 PCT/EP2007/057582 EP2007057582W WO2008015124A1 WO 2008015124 A1 WO2008015124 A1 WO 2008015124A1 EP 2007057582 W EP2007057582 W EP 2007057582W WO 2008015124 A1 WO2008015124 A1 WO 2008015124A1
Authority
WO
WIPO (PCT)
Prior art keywords
subscriber
radio
announcement
receiving
channel
Prior art date
Application number
PCT/EP2007/057582
Other languages
German (de)
English (en)
Inventor
Frank Thiele
Original Assignee
Siemens Building Technologies Fire & Security Products Gmbh & Co.Ohg
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 Siemens Building Technologies Fire & Security Products Gmbh & Co.Ohg filed Critical Siemens Building Technologies Fire & Security Products Gmbh & Co.Ohg
Publication of WO2008015124A1 publication Critical patent/WO2008015124A1/fr

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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
    • 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
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B29/00—Checking or monitoring of signalling or alarm systems; Prevention or correction of operating errors, e.g. preventing unauthorised operation
    • G08B29/18—Prevention or correction of operating errors

Definitions

  • the present invention relates to the field of wireless communication.
  • the present invention relates to a method for re insbesonde ⁇ asynchronous radio transmission in a communication network having at least two participants, each having a transmitter and a receiver.
  • the present invention further relates to a communication ⁇ device and a radio communication network, which are adapted to carry out the method according to the invention for asynchronous radio transmission.
  • the invention relates to a computer-readable Spei ⁇ chermedium and a program element containing instructions for performing the method according to the invention for asynchronous radio transmission.
  • radio is an almost ideal transmission medium. Devices with wireless technology are quick to install and easy to adapt to changing requirements. This applies in particular to modern building technology, in which a building can be protected from fires and / or burglary by a danger detection system.
  • a disadvantage of radio communication networks is the relatively short range in buildings with carrier frequencies in the gigahertz range. If so-called repeaters are used to increase the range, their high energy consumption usually requires mains-powered devices. This applies in particular to radio channels in the new Short Range Device radio band between 868 and 870 MHz.
  • Sigmaspace Fa. Siemens further be ⁇ known which uses a plurality of independent radio channels. A failure in the commu ⁇ nikationskanal thus can always be changed.
  • Sigmaspace uses a channel switching procedure based on fully synchronous time management, using up to five different radio channels in each time slice, which are used according to a fixed scheme. As with all synchronous radio transmission methods, sigma space also has the disadvantage that if a transmitter is not currently transmitting, the corresponding time segment remains unused, so that the transmission channel is not optimally utilized.
  • the invention has for its object to provide a simple method for channel management for asynchronous radio communication networks, which still allows a reliable communi cation between two radio ⁇ partners in the case of a disturbance of a radio channel.
  • Independent claim 1 describes a method for asynchronous radio transmission in a communication network with at least two subscribers, each having a sender and a receiver.
  • the inventive method comprises the steps of: (a) turning on the receiver at predetermined switching-on times for one certain reception standby, (b) transmitting a Ankün ⁇ ending telegram from a transmitting party to a receiving party during a time period that overlaps with a reception standby of the receiving subscriber ,
  • the announcement telegram has at least a first announcement signal on a first radio channel and at least a second advertisement signal transmitted on a second radio channel.
  • the receiving party is ready to receive on the first
  • the receiver of the receiving subscriber switches over to the second radio channel for a second reception period.
  • the inventive method is based on the finding that in an asynchronous radio network, a secure data transmission can be ensured even in a radio-technically difficult environment, that a sending subscriber sends an announcement telegram on different radio channels.
  • the announcement telegram comprises several announcement signals, which are each sent on a radio channel.
  • the announcement signals are intercepted by the receiving party.
  • the receiver of the receiving subscriber is switched to the second radio channel.
  • the radio transmission between sending participant and receiving participant thus takes place on the principle of "trial and error" or "try and error”. In this case, first a radio transmission on the one radio channel is tried and, if this should not be successful, changed to another Finkkanal.
  • asynchronous radio transmission in this context means a data transmission in which all radio subscribers act independently of one another in terms of time. Each participant has his own time base. There are no time windows assigned to each subscriber by a uniform system clock, in which the subscriber in question may communicate.
  • the method according to the invention has the advantage that secure communication is possible between different radio subscribers even if one or even if several radio channels are disturbed, in particular by external influences such as, for example, sabotage. It is assumed that the probability of a disturbance of the radio link on several channels at the same time is significantly lower than a fault on a single used Finkkanal.
  • Radio channels is limited. Of course, with the use of three or more radio channels, the number of different announcement signals that are sent in total on the different radio channels increases accordingly. In this case, it is switched over to another radio channel until a valid announcement signal is received by the receiving subscriber. In general, the more different radio channels are available for communication, the greater the transmission reliability.
  • the receiver is turned on at cyclically predetermined switch-on, so that the duty cycle or the duty ratio of the receiver and thus the power consumption of the receiver depending on the respective
  • an occasional synchronization of the time bases of the two radio subscribers ie the transmitting subscriber and the receiving subscriber, also makes sense in the described asynchronous method.
  • the sending subscriber can at least approximately know when the receiver of the receiving subscriber will be switched on. Accordingly, he can adapt in time to the receptivity of the receiving part ⁇ taker its broadcasting activities. In this way, long transmission durations can be avoided and the power consumption of the transmitting users can be reduced accordingly.
  • the second announcement signal is sent immediacy bar after the first announcement signal.
  • the announcement message has a plurality of successive at least first and second announcement signals.
  • the repeated transmission of the at least first and second announcement signals is then continued until the receiver of the receiving subscriber has, if necessary, intercepted all the radio channels by means of a corresponding reception period. In this way it is ensured that even if only in the last radio channel a trouble-free transmission of a corresponding announcement telegram is possible, this can actually be completely absorbed by the receiving party.
  • the first receiving period and / or the second receiving period is at least twice as long as the duration of an announcement signal. If a plurality emitted from different announcement signals from the transmitting subscriber, increasing the probability with increasing length of the first reception period and / or the second reception period, that a corresponding Ankündi ⁇ acceleration signal in the relevant radio channel can be captured completely EMP.
  • Particularly secure communication can be achieved if, in the case of immediately consecutive announcement signals of the same duration, the first reception time period and / or the second reception period is at least one announcement signal duration longer than all the different announcement signals together. In that case, it is then ensured that at least one announcement signal can always be received in principle by the receiving subscriber, both with regard to the temporal overlap and with regard to the radio channel used. Of course, this sets a sufficiently good wireless connection on the respective Channel of the reception period ahead. In the case of two ver ⁇ different radio channels, this means that the first reception period and / or the second reception period at least three times as long as the duration of a Ankiereungs- signal.
  • Any of several announcement signals can not be received by the receiving subscriber in the correct manner and evaluated accordingly.
  • the method for asynchronous radio transmission additionally comprises the following step: sending a payload telegram by the transmitting subscriber to the receiving subscriber on the first radio channel at a first time, which was communicated to the receiving subscriber by means of the announcement telegram.
  • the announcement signal may also contain information on which radio channel the payload telegram is sent. Thus, a readiness to receive accidentally be avoided on the wrong radio channel.
  • the payload telegram is independent of a successful transmission of a first advertisement.
  • transmission signal is sent.
  • the sending participants know that is not or not yet at the start of transmission, which is the principle available transmission channels last is ⁇ finally used for proper data communication between two radio subscribers.
  • the method for asynchronous radio transmission additionally comprises the step of: transmitting an acknowledgment signal by the receiving subscriber to the transmitting subscriber on the first radio channel, if that
  • the method for asynchronous radio transmission additionally comprises the following steps: (a) switching the transmitter of the transmitting subscriber to the second Funkka ⁇ cal, if the payload of the receiving party was not received correctly, and (b) sending the Nutztele ⁇ gram by the sending party to the receiving party on the second radio channel at a second time, which was communicated to the receiving party by means of the announcement telegram.
  • the second radio channel In the event of a fault in the first radio channel, the second radio channel is thus automatically switched over. In this case, switching over to the second radio channel can take place system-internally, without an operator of the communication network having to hear something about the channel change that has taken place. The ease of use of the communication network is thus in spite of the described channel management, in which the REMtra ⁇ tion can be done on different radio channels, in the United not reduced to single-channel radio communication networks.
  • the method for asynchronous radio transmission additionally comprises the following step: sending an acknowledgment signal by the receiving subscriber to the transmitting subscriber on the second radio channel, if the payload telegram has been correctly received by the receiving subscriber.
  • User telegram transmits, although the user telegram has already been received completely and correctly by the receiving subscriber.
  • the user telegram contains an address information which identifies the receiving subscriber among a plurality of possible subscribers of the communication network.
  • announcement ⁇ signals can be used with a relatively small amount of data and thus with a short duration. In this way, the total resulting radio load through the communication network is not significant even with a plurality of different transmission channels greater than the radio load of comparable single-channel asynchronous communication networks.
  • Independent claim 10 provides a communication device for a radio communication network comprising several subscribers.
  • the communication device comprises (a) a transmitter, (b) a receiver, and (c) a data processing device.
  • the data processing device which is coupled to the transmitter and to the receiver, is set up in such a manner that the above-mentioned
  • the Kommunikati ⁇ onseat invention is a participant in the radio communication network ⁇ .
  • a radio communication network which has at least two of said communication devices.
  • the radio communication network is designed as a danger detection system, in particular for monitoring buildings.
  • the individual participants may have sensors that detect a fire, for example, or detect a burglary attempt as a motion detector.
  • the participants can also take over central functions, with which, for example, by a corresponding Operational input to an input unit of a subscriber specific participants or all participants of thecinamel ⁇ system can be converted into a modified operating mode. It is also possible that individual participants have actuators to close doors, turn on or off lights and / or to set blinds in motion.
  • Independent claim 13 creates a computer-readable storage medium in which a program for operating a radio communication network having at least two subscribers each having a sender and a receiver is stored.
  • the program is executed by a data processing device, the above-mentioned method of radio transmission is performed in a communication network.
  • a program element for operating a radio communication network is provided with at least two participants, each having a transmitter and a receiver.
  • the program element is executed by a data processing device, the above-mentioned method of radio transmission is performed in a communication network.
  • the method described can thus be implemented in a simple manner by changing a software in existing radio communication networks.
  • the method described here requires much less system resources, since the operation of an asynchronous communication network does not require constant synchronization of the individual subscribers or highly accurate timers for maintaining a common time base.
  • the program element may be implemented as a computer-readable instruction code in any suitable programming language such as JAVA, C ++, etc.
  • the program element can be stored on a computer-readable storage medium (CD-ROM, DVD, removable drive, volatile or non-volatile memory, built-in memory / processor, etc.).
  • the program element may be provided in a network, such as the Internet, from where it can be downloaded by a user as needed.
  • the invention can be implemented both by means of a computer program, i. software, as well as by means of one or more special electrical circuits, i. in hardware or in any hybrid form, i. using software components and hardware components.
  • Figure 1 shows the structure of a radio alarm system with two
  • FIG. 2 a time diagram of an asynchronous radio transmission over a first of two radio channels and FIG. 3, a time diagram of an asynchronous radio transmission via a second of two radio channels.
  • FIG. 1 shows a radio hazard alarm system 100 which has a first subscriber 101 and a second subscriber 111.
  • the radio hazard detection system 100 may also have other not shown participants and / or a central office.
  • the first user 101 has a radio module 102 which comprises a transmitter 103 and a receiver 104.
  • the radio module 102 is coupled to an antenna 105.
  • the first subscriber 101 further has a microprocessor 106, which is coupled to the radio module 102.
  • the first participant also has a detection device 107, which is coupled to the microprocessor 106.
  • the detection device 107 may be, for example, a fire detector, a burglary detector or any other detector for security.
  • 111 also has the second subscriber to a radio module 112 that includes a transmitter 113 and a receptions and seminars ⁇ ger 114th
  • the radio module 112 is coupled to an antenna 115.
  • the second participant 111 also has a
  • Microprocessor 116 which is coupled to the radio module 112, and a detection device 117, which is coupled to the microprocessor 116.
  • the two radio subscribers 101 and 111 communicate with each other via a radio transmission link 108 which is formed between the antenna 105 and the antenna 115.
  • a radio subscriber can also have operating elements, so that the relevant subscriber, who may be formed with or without detection device, entered
  • a round radio alarm system monitoring system Control ⁇ ler may be provided with the further processing of a danger message is performed. So can in the case of a
  • FIG. 2 shows a time diagram of an asynchronous radio transmission within a radio communication network, which comprises a first subscriber 201, a second subscriber 211 and a third subscriber 221. There are two transmission channels, a first transmission channel KO and a second transmission channel Kl available. The three time diagrams assigned to the individual participants are shown on the
  • Abscissa the time t and plotted on the ordinate of the receive or transmit level P of the respective radio subscriber 201, 211, 221.
  • the illustrated radio scenario begins with a detection of a triggering event 230 by a detection device of the first subscriber 201, which is also referred to below as a transmitting subscriber 201.
  • Immediacy ⁇ bar following the detection of the 230 subscriber starts to send 201 a so-called notice message 240 having a plurality of immediately successive announcement signals 241 and 242nd
  • first announcement signals 241 are transmitted on the first radio channel KO and second announcement signals 241 on the second radio channel K1.
  • the announcement telegram 240 may also be delayed, ie with a certain delay in relation to the detection 230 of the triggering event. This may be the case in particular if the subscriber 201 is aware of at least approximately the reception times of the other subscribers 211 and 221. Namely, in this case, the subscriber 201 can transmit the announcement telegram 240 only during a shortened period of time within which the receivers of the subscribers 211 and 221 are actually ready to receive. As can be seen from FIG. 2, the receivers of the subscribers 211 and 221, which are also referred to below as receiving subscribers, are switched on within a receive readiness 260 or 280.
  • the readiness to receive 260 or 280 begins at an initial time, which is after the beginning of the transmission of the announcement telegram 240.
  • the readiness to receive 260 or 280 ends at an end time which is before the end of the transmission of the announcement ⁇ telegram 260. In this way it is ensured that there is a sufficient temporal overlap between the
  • the receiver is first set to the first radio channel K0 for a first reception period 261 or 281 and then to the second radio channel K1 for a second reception period 262 or 282.
  • the temporal length of the two reception ⁇ periods is so large compared to the duration of the individual announcement signals 241, 242 that at least a first announcement signal 241 and a second announcement ⁇ signal 242 in the time window of each of the two reception periods 261 and 262, 281 and 282 respectively.
  • the first radio channel KO is already sufficiently strong that interference-free radio transmission takes place on the channel KO. Accordingly, the subscriber 211 already receives a first announcement signal 241 at the time t3. If this reception is detected sufficiently rapidly by the subscriber 211, demzu ⁇ follow the receiver can be switched off for reasons of energy savings in the second reception period 262nd The same applies to the subscriber 221. This receives at the time t2 a first announcement signal 241, so that possibly the Receiver of the subscriber 221 in the second receiving period 282 can be turned off.
  • all the first announcement signals 241 contain the information at what time from the transmitting subscriber 201 a payload message 251 is transmitted on the first channel KO. Accordingly, all second announcement signals contain 242, the infor mation ⁇ , at which time from the sending agent 201, if necessary, a Nutztelegramm is sent on the second channel Kl 252nd
  • the two receiving subscriber can be adjusted 211 and 221 on a timely and their recipients interface modules ⁇ th. By an interim switching off the receiver thus the power consumption of the receiving party may be 211 and 221 reduced.
  • the reception 271 of the useful telegram 251 begins at a point in time which lies around the time interval ⁇ t3 after the time t3.
  • the reception 291 of the useful telegram 251 begins at a time which lies around the time interval ⁇ t 2 after the time t 2.
  • this is the subscriber 211.
  • This can thus after the complete reception 271 of the payload 251 on the first channel KO an acknowledgment signal 276 also on the channel KO to the sending party 201.
  • an acknowledgment signal 276 also on the channel KO to the sending party 201.
  • the data exchange between the sending subscriber 201 and the receiving subscriber 211 ends.
  • Resending the User telegram from the subscriber 201 within a time ⁇ window 252 is thus no longer required as switching on the receiver of the transmitting subscriber 201 within a time window 257, which would be provided for the receipt of an acknowledgment signal.
  • the receiving subscriber 221 Upon receiving an evaluation of the address information of the received payload message 251, the receiving subscriber 221 recognizes that the payload message 251 was not intended for it. As a result, no transmission of an acknowledgment signal from the subscriber 221 to the sending subscriber 201 takes place in the time window 296, which would possibly be used for another address information for the transmission of an acknowledgment signal on the channel KO.
  • FIG. 3 shows a time diagram of an asynchronous radio transmission between the transmitting subscriber 301 and the receiving subscriber 311 and 321.
  • the first channel K0 is now disturbed. Consequently, the radio communication takes place via the second channel K1.
  • a notification message begins after the detection 330 of a triggering event, the sending subscriber to send 340, which is based on a temporal sequence of alternately a first Ankündi ⁇ acceleration signal 341 on the channel KO and a second Ankündi ⁇ acceleration signal 342 the channel Kl has.
  • a first reception period 361 is provided for the reception of a first announcement signal 341 on the channel K0 and a second reception period 362 for the reception of a second announcement signal 342 on the channel Kl.
  • Figure 3 represented by the double arrow 363.
  • the receiving subscriber 321 also changes the radio channel after waiting in vain for a first announcement signal 341 (see double arrow 383), so that a second announcement signal 342 is received on the second channel K1 at the time t1 within the second reception period 382.
  • both the receiving subscriber 311 and the receiving subscriber 321 know that the first radio channel KO is disturbed and subsequent data transmission can only take place on the channel K1.
  • the participants 311 and 321 already communicated with the reception of entspre ⁇ sponding notice signal 342, when the sending station 301 is transmitting on the channel Kl user data.
  • the receivers of the subscribers 311 and 321 can be temporarily turned off, thus contributing to the power saving.
  • the sending party 301 since the sending party 301 does not (yet) have this information regarding the availability of the radio channels, it will first try to send the payload telegram 351 on the channel K0. However, this useful message can not be received by either the subscriber 311 or the subscriber 321 because of the interference of the radio channel KO. Consequently, no
  • the reception 372 of the useful telegram 352 by the subscriber 311 begins at a time which lies around the time interval ⁇ t 2 after the time t 2.
  • the reception 392 of the Nutztele ⁇ program 352 by the subscriber 321 starts at a time which is the time span .DELTA.TL after the time tl.
  • the payload telegram 352 also contains an address information, according to which the subscriber 311 is the addressee of the payload telegram 352. Accordingly, the receiving party 311 sends after receipt of the 372 352 Nutztelegramms a Quittungssig ⁇ nal 377 sends to the transmitting party 301. The not intended as addressee subscriber 321 consequently in the time window 397 no acknowledgment signal. With the reception 357 of the acknowledgment signal 377 by the first participant 301, the data exchange between the sending participant 301 and the receiving participant 311 ends.
  • this application describes a channel management for asynchronous radio communication networks.
  • ⁇ ended announcement signals 341, 341 sequentially for under- different radio channels KO, Kl transferred.
  • the receiver of the receiving subscriber 311, 321 of the communication network are also sequentially within different Emp ⁇ fang periods 361, 362, 381, 382 set to the different radio channels KO, Kl.
  • the overlap is also sequentially within different Emp ⁇ fang periods 361, 362, 381, 382 set to the different radio channels KO, Kl.
  • the announcement signals 341, 342 preferably contain the
  • Time window for sending of the useful telegram (not done) 256
  • Receiving acknowledgment 257
  • Time window for receiving acknowledgment (not done)

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Security & Cryptography (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

La présente demande décrit une gestion de canal pour réseaux de radiocommunication asynchrones. Des signaux d'avertissement complets (341, 342) sont transmis respectivement séquentiellement sur différents canaux radios (K0, K1). Les récepteurs des abonnés de réception (311, 321) du réseau de communication sont également ajustés séquentiellement à l'intérieur de différents intervalles de réception (361, 362, 381, 382) sur les différents canaux radios (K0, K1). Les temps d'émission des signaux d'avertissement (341, 342) et les intervalles de réception correspondants (361, 362, 381, 382) se chevauchent. En cas de canal radio (K0) perturbé, il existe la possibilité que l'abonné de réception reçoive un signal d'avertissement (342) sur un canal (K1) non perturbé, et qu'un échange de données (352) consécutif soit également réalisé sur ce canal (K1) non perturbé. L'objectif de la gestion de canal consiste à recevoir un signal d'avertissement (342) valide sur un canal radio (K1) non perturbé. Si un signal d'avertissement (342) est reçu, celui-ci est alors évalué par l'abonné de réception (311). Si aucun signal d'avertissement (341) n'est reçu, une commutation sur le canal radio (K1) suivant a lieu. De préférence, les signaux d'avertissement (341, 342) contiennent l'information du moment de l'échange de données (352), de sorte qu'un abonné de réception (311) peut brancher sélectivement son récepteur au moment de l'émission des données utiles correspondantes (352).
PCT/EP2007/057582 2006-07-31 2007-07-23 Gestion de canal pour réseaux de radiocommunication asynchrones WO2008015124A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP06118218A EP1884905A1 (fr) 2006-07-31 2006-07-31 Gestion de canal pour un réseau de communication radio asynchrone
EP06118218.4 2006-07-31

Publications (1)

Publication Number Publication Date
WO2008015124A1 true WO2008015124A1 (fr) 2008-02-07

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PCT/EP2007/057582 WO2008015124A1 (fr) 2006-07-31 2007-07-23 Gestion de canal pour réseaux de radiocommunication asynchrones

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WO (1) WO2008015124A1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0484880A2 (fr) * 1990-11-05 1992-05-13 Norbert Schaaf Système radio d'alarme
EP0911775A2 (fr) * 1997-09-30 1999-04-28 Siemens Aktiengesellschaft Procédé de transmission radio dans un système de signalisation d'alarmes
EP1282094A2 (fr) * 2001-08-03 2003-02-05 Siemens Gebäudesicherheit GmbH & Co. OHG Méthode de transmission hertzienne dans un système d'alarme

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0484880A2 (fr) * 1990-11-05 1992-05-13 Norbert Schaaf Système radio d'alarme
EP0911775A2 (fr) * 1997-09-30 1999-04-28 Siemens Aktiengesellschaft Procédé de transmission radio dans un système de signalisation d'alarmes
EP1282094A2 (fr) * 2001-08-03 2003-02-05 Siemens Gebäudesicherheit GmbH & Co. OHG Méthode de transmission hertzienne dans un système d'alarme

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