EP1363260A1 - Procédé de communication radiofréquence entre plusieurs dispositifs et système de surveillance mettant en oeuvre un tel procédé - Google Patents
Procédé de communication radiofréquence entre plusieurs dispositifs et système de surveillance mettant en oeuvre un tel procédé Download PDFInfo
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- EP1363260A1 EP1363260A1 EP03360058A EP03360058A EP1363260A1 EP 1363260 A1 EP1363260 A1 EP 1363260A1 EP 03360058 A EP03360058 A EP 03360058A EP 03360058 A EP03360058 A EP 03360058A EP 1363260 A1 EP1363260 A1 EP 1363260A1
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- Prior art keywords
- message
- devices
- peripheral
- central device
- central
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- 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
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- 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 present invention relates to the field of communication by radio transmission between several elements in particular, but not exclusively, in the case of surveillance or alarm, and relates to a communication method improved and a surveillance or alarm system implementing such process.
- the sensors or other peripherals are frequently emitted for all detected detections regardless of how the system is activated (armed or disarmed) because they are not aware of the state of the system defined at the level of the Central.
- the reception at the level of the central can only be intermittent and the emission at the level of the sensors also.
- the duration of transmission on the sensor side is greater than the duration of the rhythm listening (receiving) side central.
- the present invention aims to meet at least some of the needs expressed above and to provide a responsive solution at least some of the foregoing limitations.
- the subject of the present invention is a method of bidirectional communication by radio message transmission frequency in the form of digital frames modulated in frequency between a central or primary device master and several peripheral devices or secondary slave, these devices being all physically independent, with autonomous and at least a radio transmission / reception circuit, as well as a counting the time providing a local time reference, characterized in that it consists, in normal operation, in synchronize the accounting modules at predetermined intervals different devices by sending a radio message from synchronization of the central device to peripheral devices and to establish a discontinuous radio communication link, during predetermined repetitive separate temporal windows between said central device and peripheral devices, corresponding to limited periods of cyclic activation of said central device and at least some of said peripheral devices, repeated at regular intervals and / or predetermined, of duration (s) lower than those (s) intervals separating two successive transmissions of the synchronization message, each activation period including a first phase or interval temporal authorization or obligation to issue message (s) for a peripheral devices and simultaneously listening, at least during a first part
- the repetition of synchronization phases will be preferentially regular, that is to say with a given frequency (simple and robust procedure). However, this repetition can also be irregular and follow a given pattern identical for the device central office and the peripheral devices concerned.
- each message exchanged between master device and device (s) slave (s) includes a first part forming a preamble whose duration time is greater than the maximum drift of synchronization between the central device and the peripheral devices during the interval separating two successive synchronization messages and the one or more listening device (s) remain activated (s) at least during the duration of this preamble, in a continuous or discontinuous manner, said one or more devices are disabled (s) or paused in the absence of detection of message after this period has elapsed.
- the body of the preamble can be constituted by a portion of message digital formed of a repeating pattern having both 1 and 0, preferentially present in a regularly alternating manner, said preamble ending with a particular numeric character pattern different from said repetitive pattern, preferably an extended sequence of one plurality of 1, followed by a prolonged sequence of a plurality of 0's.
- the preamble is followed by a synchronization byte for activation of the asynchronous radio transmission interface of the circuit transmission / reception of the device (s) central or peripheral (s) recipient (s), and that said peripheral devices realize, after each receipt of a synchronization radio message, a check of the validity of the message, then an exploitation of its information temporal comparison with the local time reference of the concerned peripheral device and the subsequent modification, in advance or delay, of the local time reference provided by the module of corresponding accounting for the difference observed or fraction of the latter, evaluated taking into account at least the last two previous differences noted.
- the length of the messages sent will be calculated in such a way that in no case shall the assigned emission authorization phase.
- the device Central is always listening during the first phase of each cyclical activation period.
- peripheral devices are allowed to transmit, one by one, in a predetermined cyclic order, for example linked to their identification and registration address with the central device, and with a frequency of repetition, occurrence or achievement corresponding to a sub-multiple of the repetition frequency limited periods of activation and listening phases of said devices devices are repeated with a repetition or occurrence frequency corresponding to a sub-multiple of the frequency of repetition of periods activation limits, said repetition frequencies being different for each type or each of the peripheral devices, the frequencies of the listening phases being, for the same peripheral devices, superior at frequencies, transmission phases all peripheral devices listening to each broadcast of a radio message from synchronization issued by the central device.
- the messages addressed by the peripheral devices to the central device consist either of in predetermined routine messages indicating a normal situation at the level of the peripheral device concerned and addressed compulsorily to the central device in a repetitive manner at successive instants specific to each peripheral device, either in random messages of signaling an incident, an event or an abnormal situation, each signaling message being transmitted to the central device during the authorization phase of the activation period immediately following the occurrence of the incident, event or situation abnormal and its emission beginner before the beginning of the authorization phase transmission, said signaling messages being provided with preambles extended.
- the method according to the invention thus implements a method active monitoring of the radio link between the peripherals and the plant by sending presence messages cyclically.
- the devices send their respective message in a sequential using their individual address to determine the instant of emission compared to their reference of local time, itself set periodically on the sequencing of the plant. Similarly, the central determines for itself the moments during which it is supposed to receive the presence messages of the various registered devices.
- the different devices are capable of transmitting and receiving radio signals on at least two frequency channels, namely a channel principal used in normal operation and at least one fallback channel, folding or rescue used in case of difficulty of transmission on the main channel, or by temporal distribution of communications on several channels used alternately.
- said method may consist of switching radio transmissions between devices of the main channel on the or a fallback channel at the initiative peripheral device, after the latter has diagnosed a cut of its radiofrequency link with the central device, either because lack of reception, possibly repeated, of a radio message from synchronization at one or more predetermined deadline (s), the fact that there is no reply message or acknowledgment of receipt central device following the prior sending, repeatedly, of messages radio, in particular, signaling messages of an incident, a event or abnormal situation, of the peripheral device concerned to said central device.
- the changeover transmissions between devices on the or a fallback channel consists, for the peripheral device at the initiative of said failover, to switch on the or a fallback channel at the time of the advent of an authorization phase or obligation to issue messages (s) assigned to it in the order established for the different peripheral devices, to then go into listening situation for a first period at least equal to the sum intervals between two periods of cyclic activation and such a period, and possibly, in a repetitive manner, during the estimated consecutive emission phases of the central device, this up to receive an offset synchronization message transmitted by the device central and setting the new transmission and listening rhythm between peripheral device and said central device on said fold channel.
- the switching transmissions between devices on the or a fallback channel consists, for the central device, after noting the repeated absence of receiving any message, in particular a routine message, during successive phases of authorization or obligation allocated to the peripheral device having switched over, to be transmitted during the next scheduled listening phase of said peripheral device a synchronization message shifted on the fold channel, or successively on the various possible fallback channels, to possibly repeat this during successive successive listening phases of peripheral devices on the fallback channel (s), up to receiving a message back from said peripheral device having switched over, and to address one or more messages, in one or more emission authorization phases of said central device, requiring the failover of other peripheral devices on the fallback channel considered, where appropriate in the order of addressing of said other devices peripherals, the successive transmission / reception phases of the different devices on the main channel and the fallback channel being shifted temporally, the order of addressing devices, after their failover, will be the fallback channel being either identical to that prevailing over the main channel, which is different from the latter, the new order being
- This last provision allows the central device to communicate simultaneously with all distributed peripheral devices on both transmission channels.
- the devices are capable of transmitting and receiving radio signals on the minus two different frequency channels and at each time window successively the central device and the peripheral devices are switched to a different channel from the one used for the time window immediately preceding, according to a predetermined order of succession of said channels, which is identical for each device and which runs from synchronously for all said devices.
- each activation period is carried out one jump frequency in a deterministic pattern identical for all devices.
- the latter use at least four different communication channels and the order of succession of said channels is selected at the start of said devices.
- the repetition sequence of the different channels will be preferentially odd when the number of usable channels is even and will have a number of steps greater than the number of usable channels.
- the pairing of such a new peripheral device or the re-pairing of a peripheral device having been disconnected from the device exchange consists of exchanges of asynchronous radio messages to be sent to the central device a message indicating the characteristics of said new peripheral device, in particular the frequency of its activation for the program and listen to it, then to transmit to it an address identification, also fixing its order in the sequence of the phases authorizing the transmission of the different peripheral devices in connection with the central device, an initial synchronization message and a possible site identifier used for secure transmissions.
- the process according to the invention may consist of a mobile device, having been moved out of the field of coverage of the central device and having received a reactivation signal and / or reconnection or having been the subject of a solicitation of this type, to be issued continuously for a duration greater than the sum of the durations of a activation period of devices and an interval separating two such periods, a signaling frame containing the identifying address or the identifier assigned to said device, then to put itself in listening situation in view of receiving a response from the central device, in the form of a initial synchronization message with request authentication, to repeat the two previous operations for the different transmission channels, starting with the last one channel used by said peripheral device before its disconnection from the central office, until a response is received from the central reaching the predetermined maximum number of attempts, with standby or subsequent deactivation of said peripheral device considered in case not restoring communication with the central device.
- each peripheral device can have two different frequencies of repetition of its cyclic activation period and radio communication with the central device, namely a low frequency and a frequency high, said peripheral device operating normally with the low repetition rate and said peripheral device tilting towards the high repetition rate when said device is biased or activated or, in advance, when said device determines the occurrence next action that may require or require the establishment of a communication with the central device.
- the communication method according to the invention can be implemented by a surveillance or alarm system, the central device consisting of a microprocessor alarm control panel for the execution of the management and control of the said system and provided with an interface external communication and peripheral devices consisting of one or several sensor (s), control organ (s), imaging organ (s) and / or sound, siren (s), horn (s), actuator (s), detector (s) and / or communication device (s) to a network.
- the central device consisting of a microprocessor alarm control panel for the execution of the management and control of the said system and provided with an interface external communication and peripheral devices consisting of one or several sensor (s), control organ (s), imaging organ (s) and / or sound, siren (s), horn (s), actuator (s), detector (s) and / or communication device (s) to a network.
- the invention also relates to a surveillance system or alarm system comprising a control unit and peripherals, forming independent and self-powered devices, characterized in that implements the communication method as described above.
- a surveillance system or an alarm device consisting of at least one central or central device 1 to microprocessor (in some cases called base) cooperating with at least a peripheral or peripheral device 2 chosen from the list comprising sensors, control devices, sirens, horns, actuators and communication devices to a network through communications short distance radio (also known as SRD) using a free band of type ISM).
- base central or central device 1 to microprocessor
- peripheral or peripheral device 2 chosen from the list comprising sensors, control devices, sirens, horns, actuators and communication devices to a network through communications short distance radio (also known as SRD) using a free band of type ISM).
- Each element of this system shown schematically in FIG. 6 is equipped with a radio transmission / reception circuit 1 ', 2' (alternating) and has an independent power source (battery or battery), as well that a 1 ", 2" time accounting module associated with a reference of time (typically a quartz with a counting chain) yet called “local reference”.
- a radio transmission / reception circuit 1 ', 2' (alternating) and has an independent power source (battery or battery), as well that a 1 ", 2" time accounting module associated with a reference of time (typically a quartz with a counting chain) yet called “local reference”.
- Central 1 transmits a radio signal periodically containing information representative of the temporal sequencing of said central unit 1 and the peripherals 2 capture this information so to stall their inner workings on an identical or multiple rhythm of that of the central 1 or at least try to approach it.
- the central 1 sends the temporal information, it precedes it with a series number of characters (called the preamble) whose transmission duration is greater than the maximum observable drift between a device 2 and the central 1 (given the uncertainties related to the accuracy of quartz, temperature, aging of quartz and various uncertainties), increased by the number of characters needed to ensure receive synchronization, allowing devices 2 in reception to detect the transmission of time information despite the drifts of time references, knowing that the rhythm and timing of transmission are predetermined both in Central 1 and in the devices 2 considered.
- the preamble a series number of characters
- Said devices 2 exploit this temporal information after verification of the validity of the latter (use of a "signature” or authentication) by modifying their chain of counting in advance or delay of the latter following the gap observed between the local reference (device 2) and the information temporal value transmitted, of a value equal to that difference or a fraction thereof difference, weighted by the average value calculated in a sliding manner on the previous discrepancies.
- the central 1 can operate on a reception rate of one second (interval separating two listening phases successive), for a duration of about 8 ms in the absence of message and 30 ms in the presence of message from a synchronized device 2.
- the window or listening phase of control panel 1 starts 125 ms (1/8 s) before his speech window. This window is called Peripheral Speech Time (TPP).
- TPP Peripheral Speech Time
- This listening period of Central 1 is followed by a time of 40 ms word for the latter called TPC (central speaking time). It is used to synchronize devices every 64 seconds (repeated sending of synchronization message). TPC speaking times do not are used only if the plant has information to transmit. The synchronized devices are not allowed to transmit during the TPC (see figure 1).
- unsynchronized 2 devices When unsynchronized 2 devices are transmitting, they may accidentally do so during the speaking time of the plant, and for a duration of up to one second. The plant must therefore check before issuing, the presence or absence of a program already engaged.
- the overall tolerance will be +/- 100 ppm to account for other factors (aging, resynchro dispersion, ).
- devices are also listening in an alternating cycle predetermined. While for the central this cycle is one second, it may vary from 2 to 30 seconds depending on the devices.
- the control unit informs affected devices of the activation of this mode of communication, this which will have the consequence for the peripherals concerned to maintain the receive activated until the transaction or communication in progress is completed or this mode is disabled by the control panel.
- the central and devices have a time base of 32768. So all the 64s, the control unit emits a synchronization signal (message) that allows devices to reset the counting channels of their modules counting 2 ".
- the sync top coincides with the end of the message word of synchronization (but another convention can be used).
- the power plant must therefore anticipate the length of the preamble to be "on time”.
- the devices go into receive mode at the same pace than that used by the plant during TPP.
- the synchronization message can take on the appearance of any message. We can imagine that to reduce the effect of a loss of synchronization, devices software adjust their clock based on the discrepancies noted at the time of synchronization. AT correction error a measure of the difference found (between the signal of sync and the local clock) can help maintain a level of satisfactory performance in case of "prolonged" sync loss, as necessary activation anticipations can be minimized.
- drifting references local time and the lack of synchronization due to the lack of receiving the cyclic synchronization message forming "top of "sync", which may be due to a loss of connection between central and peripheral.
- drifts of local clock the error will be, in the practical case mentioned above, 6 ms is a delta of 12 ms as mentioned previously.
- control unit is activated first, a device can issue 12 ms later. These 12 ms are advantageously absorbed by the presence of a preamble signal preceding the message proper (see Figure 2A).
- the preamble contains as many as 1 as 0 so that, encoded in frequency modulation, the average value of the signal
- the radio frequency corresponds to the central value of the radio channel the activation of an automatic frequency control device (AFC) receiver side, at the beginning of the call.
- AFC automatic frequency control device
- the preamble consists of a sequence of characters 55h (101010 7) allowing faster operation of frequency servoing and can be followed by a pattern consisting of two FFh and 00h characters used to mark the end of the preamble and the beginning data transmitted in the message or frame concerned 2.
- said preamble may, for example, be composed of 15 characters or 15.6 ms duration (at 9600 bds).
- the first 14 characters may be identical and be worth 0xF0 (0000011111 in binary).
- the 15th is 0x9C (0001110011 in binary).
- the beginning of the preamble materializes in the form of positive and negative pulses of equal length ( ⁇ 521 ⁇ s).
- the last character 0x9C indicates the end of the preamble.
- activation of the latter can be cut in two periods of 4 ms (instead 15 ms continuous), as shown in Figure 2B.
- a synchronization fault may occur when device 2 misses one or more synchronization message (s) issued by the central 1.
- the device retains its internal reference, but in the next minute he will have to anticipate the TPC in order to to be able to receive the synchronization message even in case of delay.
- the device concerned must initiate a procedure to recover its synchronization, as than that represented for example in FIG.
- the system according to the invention will, for example, have to implement a method of managing the multi-channel transmissions with crimping in case of failure of the usual radio link.
- the central 1 request to the different devices 2 recorded to measure the signal quality radio on all exploitable channels (measurement of noise floor at the RSSI - signal strength indicator received, so that to be able to determine in a second time what will be respectively the main channel and backup channel (or fallback). After doing the selection, the central unit 1 indicates to all the devices the instructions on the choice of channels.
- one of the devices 2 of the system will be the channel change initiative when the requirements are filled, and Central 1 will emit a form of radio beacon on the channel of fallback (after the required conditions), while retaining the management of the main channel.
- Each device 2 having switched on the channel of drawdown changes its rhythm and timing of reception. Indeed, while the devices running on the main channel are busy according to different rhythms (depending on the nature of the devices), the rhythm is identical for everyone as soon as they have switched to the fallback channel.
- the instants of the listening phases on the channel fallback are offset from the nominal operation.
- the exchanges except alerts are done on second pairs and, in emergency operation (draw channel) and the radio beacon is transmitted by the central unit 1 on odd seconds (which allows it to continue to manage other devices 2 on the main channel).
- the link loss procedure is initiated after two synchronization losses (two synchronization messages not received).
- the isolated device of the plant continues to listen for a synchronization every minute on the initial channel.
- Anticipation of TPP and TPC intervals are anticipated (or delayed) of the value: (Number of minutes since last sync) x (average error found).
- the isolated device switches to the fallback channel when it was supposed to send his message of presence and goes back to receiving mode for a second to try to capture a synchro (the central having noted the absence of a signal of presence, it is programmed to issue a status request (synchronized) on the fold channel.
- the affected device will fall asleep for 32 seconds, then reactivate reception for 40 ms on the fallback channel (during the TPC) and so on (sleep, Rx, ). These 40 ms are divided into 4 ms periods of Rx separated by standby time of 2 ms.
- a mobile device such as a remote control
- the surveillance or alarm will be a special case since it could be outside the coverage area at the time of migration (switchover of devices on the fallback channel).
- a mobile device such as a remote control
- it transmits asynchronously successively on the four channels in starting with the most recently used channel.
- the show on each channel must be one second to allow listening by the central.
- the different communication channels that can be used are preferentially located in the 868 MHz band.
- a mobile device such as a remote control will have to be managed in a specific way, particularly with regard to its communication with the plant, since it is likely to leave the Radio coverage area of the plant.
- the proposed frame contains 4 bytes repeated 241 times for to obtain a second of emission:
- the first byte is a preamble byte
- the 2nd is the same sync byte preamble messages and is 0xf0 (0000011111 in binary.
- the 3 rd and 4 th bytes are a fixed value at the time of the remote pairing .
- the first case is identified by the central by the observation of the envelope of superimposed carriers: the signal indicating the level of field should in principle indicate at the end of the TPP the absence of a signal, consecutive to the impossibility of decoding viable data during the TPP.
- the control unit continues by transmitting in the TPC a message asking for extended listening of devices to allow a call of two.
- the emission of the remote control is perceived by the plant, at the earliest at the time of the TPP, if not in the process of dialogue.
- the field level signal will indicate a continuation of the presence of the program, and in the process of dialogue, intervals of silence will not be respected. From these observations, the central interrupts the ongoing dialogues to listen (and decode as soon as as possible) the frame of the remote control. It would be desirable for involved devices can also detect this case for cancel a scheduled broadcast.
- the control unit responds with a message (in priority on what was being done) to the remote control to initiate a dialogue.
- This answer must intervene in the standard delay so that the remote control does not switch to the channel next radio. It would be desirable if this collision occurs at moment of a synchro, that the devices having found either the absence sync, or the remote control frame, carries over to the next second the attempt to sync. In case of failure (that is to say of impossibility for the to send the sync), this will be done for the next minute (at this point, in 63 seconds).
- the surveillance or alarm system can also be implement an initial synchronization method for each new device 2 (also called pairing).
- a device before a device can integrate into the system, it will have to exchange information on its characteristics (type of sensor, identifier, ..) and receive back an address code allowing identify it within the system, as well as a "setting time" of its reference local to central 1.
- the emission periods are interspersed short reception periods in order to test a possible response from the Central 1 (and engage the dialogue ).
- Said plant 1 will be previously placed in a specific mode used to install new devices 2, so as not to accidentally take into account a device being installed in another system within range radio.
- This initial synchronization mode can also be applied to devices that have left the radio coverage area of Central 1 (remote control, alert locket, etc.). Indeed, if we wish them solicit after returning to the perimeter of Central 1, they must resynchronize to be able to dialogue. Similarly, a device 2 having been stopped (battery replacement) will have to re-engage this procedure.
- Such a frame is shown in FIG. 5 of the drawings annexed, and is normally preceded by a preamble and a byte of synchronization as evoked above (not shown).
- the "signaling" fields indicate to the recipient device (s) of the frame the conditions and the sequence of the transmission in progress.
- These fields can for example indicate the situation of the frame in a transmission (first, last), the number of recipients (frame destined for a specific device or all devices), the type of recipients (device with a transmission in progress), whether or not to write encryption or authentication, and to synchronized or asynchronous nature of the frame.
- the length (coded on 6 bits) indicates the number of bytes of the data area.
- the Ack flag is an acknowledgment flag indicating that the frame is also used to acknowledge the received frame.
- Valid addresses are from 01h to 3Eh, the value 00 being used for broadcast commands and the 3Fh value for unpaired devices.
- the address of the control panel is always implicit. In the peripheral direction towards the central, the address represents the sender, in the opposite direction, it is the addressee.
- the data field forms the area containing the information helpful.
- Most frames are of fixed length, that is, the data is on 32 bits. To homogenize the formats, the length so in all messages.
- the "MAC” field is used to authenticate the message and the calculation of its content can be achieved in different ways, in particular according to those known to those skilled in the art, for example of the type known as AES.
- CRC is a zone of cyclic redundancy to ensure that the frame has not been faulted during the radio transmission. Its calculation complies with the CCIR standard. The data taken into account in the calculation include all the fields (from signaling_1 to MAC included).
- the first nonstandard sequence is used by the remote control (and all other mobile devices) to indicate its intention to issue a status frame. Indeed, a prolonged distance of the central causes the synchronization to be lost.
- the remote control sends a particular sequence for one second on the last used channel and tries to get a response from the plant. Failure results in the issuance of the same sequence on another channel, and so on until exhaustion four possible channels.
- the other non-standard sequence is used by the plant for resynchronize devices whose radio link has been interrupted for an extended period (typically> 512 s). This case does not concern mobile devices (remote controls, medallions, etc.). Indeed, after 128 seconds without synchronization and a failed sync request, a device goes into a sleep mode from which it will only come out on solicitation of the plant, in order to preserve the energy of the batteries. AT use, times will be refined not to get a system too sensitive.
- Figures 7 and 8 show schematically the different states possible for peripheral devices 2, respectively in relation to the first and second modes of production.
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Abstract
Description
- message de signalisation ou d'alerte (intrusion, auto protection, défaut d'alimentation, ...)
- message de présence (avec éventuellement indication niveau de pile et niveau de champs).
- appel systématique des périphériques par la centrale (inconvénient : consommation accrue pour la centrale)
- envoie automatique du message de présence par le périphérique initié par un premier appel (la centrale peut ainsi répartir les périphériques sur les 600 secondes et de ce fait éviter les collisions ultérieures). Cet automatisme peut s'arrêter par l'envoi d'une commande "silence" par la centrale.
- cycle à 2 secondes : réveil sur les secondes paires (0,2,4,...)
- cycle à 10 secondes : 0, 10, 20, 30, 40, ...
- cycle à 30 secondes : 0 et 30 secondes.
- un périphérique particulier
- les périphériques ayant initiés une communication (ou en cours de dialogue) avec la centrale
- tous les périphériques.
- de manifester/détecter une activité radio tout en préservant le message d'une troncature,
- d'effectuer un AFC (contrôle automatique de la fréquence) si la fréquence moyenne vaut f0 (nombres de 0 et de 1 identiques)
- de synchroniser le récepteur pour activer l'UART (interface d'émission / réception asynchrone) au moment opportun,
- d'absorber les écarts d'horloge entre les éléments constitutifs du système.
- par le(s) périphérique(s) concerné(s), pour basculer sur le canal de repli après un nombre prédéterminé d'absence de recalage (non réception de plusieurs messages de synchronisation) ou de répétitions successives d'émission de messages de signalisation d'événement restés sans réponse, et,
- par la centrale, pour rechercher le(s) périphérique(s) aux "abonnés" absents (absence de message de présence ou de non-réponse à une requête).
(Nombre de minutes écoulées depuis a dernière synchro) x (erreur moyenne constatée).
- en l'absence de signal de synchronisation, la télécommande s'endorme et ne se réactive que sur appui d'un bouton,
- un appui bouton "réveille" la télécommande qui n'est donc plus synchronisée ; pour être sûre d'être entendue, elle devra émettre durant une seconde sur chacun des quatre canaux possibles de communication en commençant par le dernier (en date) utilisé
- chaque émission est suivie d'un temps d'écoute pour détecter une possible réponse de la centrale pendant une durée déterminée avant de passer au canal suivant
- pour indiquer cette phase à l'usager, on peut faire clignoter une diode de manière rapide jusqu'à ce que la liaison avec la centrale soit établie
- lorsque la centrale détecte la télécommande, elle répond par une demande d'authentification accompagnée des paramètres de synchronisation
- trame de signalisation transmise en continu (1 seconde) ne contenant qu'une information simplifiée d'identification de l'envoyeur (pour permettre l'interprétation du message avec un nombre réduit d'octets reçus),
- réponse de la centrale par une demande d'authentification,
- envoi du certificat d'authentification par la télécommande avec les paramètres de celle-ci (id du bouton appuyé, niveau pile, ...).
- réponse simultanée de deux périphériques lors du TPP ;
- superposition d'une émission télécommande (asynchrone) avec un dialogue centrale-périphérique.
- Rx : réception ;
- Tx : émission ;
- "time-out" : écoulement du délai imparti ;
- "timing" : séquencement ou cycle de répétition ;
- P_stat : trame de statut du périphérique ;
- C_app : trame d'appairage émise par la centrale ;
- P_init : trame de demande d'appairage ;
- P_txt : trame de saisie de texte ;
- synchro ou sync : trame de synchronisation ;
- C_chan : trame de changement de canal émise par la centrale ;
- C_stat : trame de demande de statut émise par la centrale ;
- C_xxx : trame indéterminée ;
- "burst" : salve ;
- "tst" : test.
Claims (17)
- Procédé de communication bidirectionnelle par transmission de messages radio fréquence sous forme de trames numériques modulées en fréquence entre un dispositif central ou primaire maítre et plusieurs dispositifs périphériques ou secondaires esclaves, ces dispositifs étant tous physiquement indépendants, pourvus de sources d'énergie autonomes et au moins équipés d'un circuit d'émission / réception radio, ainsi que d'un module de comptabilisation du temps fournissant une référence temporelle locale, procédé caractérisé en ce qu'il consiste, en fonctionnement normal, à synchroniser à intervalles prédéterminés les modules de comptabilisation des différents dispositifs (1 et 2) par l'émission d'un message radio de synchronisation du dispositif central (1) vers les dispositifs périphériques (2) et à établir une liaison de communication radio discontinue, pendant des fenêtres temporelles séparées répétitives prédéterminées, entre ledit dispositif central (1) et les dispositifs périphériques (2), correspondant à des périodes limitées d'activation cyclique dudit dispositif central (1) et d'au moins certains desdits dispositifs périphériques (2), répétées à intervalles réguliers et/ou prédéterminés, de durée(s) inférieure(s) à celle(s) des intervalles séparant deux émissions successives du message de synchronisation, chaque période d'activation comprenant une première phase d'autorisation ou d'obligation d'émission de message(s) pour un des dispositifs périphériques (2) et simultanément d'écoute, au moins pendant une première partie de cette première phase, pour le dispositif central (1) et une seconde phase d'autorisation d'émission de message(s) pour le dispositif central (1) et simultanément d'écoute pour au moins un des dispositifs périphériques (2), destinataire(s) programmé(s) d'un tel éventuel message du dispositif central (1), ladite seconde phase suivant immédiatement ladite première phase et le message de synchronisation étant émis à intervalles prédéterminés pendant une telle seconde phase.
- Procédé selon la revendication 1, caractérisé en ce que chaque message échangé entre dispositif maítre (1) et dispositif(s) esclave(s) (2) comprend une première partie formant préambule dont la durée temporelle est supérieure à la dérive maximale de la synchronisation entre le dispositif central (1) et les dispositifs périphériques (2) pendant l'intervalle séparant deux messages de synchronisation successifs et en ce que le ou les dispositif(s) en phase d'écoute demeurent activé(s) au moins pendant la durée de ce préambule, de manière continue ou discontinue, ledit ou lesdits dispositifs étant désactivé(s) ou mis en veille en l'absence de détection de message après écoulement de cette durée.
- Procédé selon la revendication 2, caractérisé en ce que le corps du préambule est constitué par une portion de message numérique formé d'un motif répétitif comportant autant de 1 que 0, préférentiellement présents de manière régulièrement alternée, ledit préambule se terminant par un motif de caractères numériques particulier différent dudit motif répétitif, préférentiellement une suite prolongée d'une pluralité de 1, suivie d'une suite prolongée d'une pluralité de 0.
- Procédé selon la revendication 3, caractérisé en ce que, pour chaque message émis, le préambule est suivi d'un octet de synchronisation pour l'activation de l'interface de transmission radio asynchrone du circuit d'émission / réception (1', 2') du ou des dispositif(s) central (1) ou périphérique(s) (2) destinataire(s), et en ce que lesdits dispositifs périphériques (2) réalisent, après chaque réception d'un message radio de synchronisation, une vérification de la validité dudit message, puis une exploitation de son information temporelle par sa comparaison avec la référence temporelle locale du dispositif périphérique (2) concerné et la modification consécutive, par avance ou retardement, de la référence temporelle locale fournie par le module de comptabilisation correspondant (2") en fonction de l'écart constaté ou d'une fraction de ce dernier, évaluée en tenant compte au moins des deux derniers écarts antérieurs relevés.
- Procédé selon l'une quelconque des revendications 1 à 4, caractérisé en ce que le dispositif central (1) est systématiquement à l'écoute pendant la première phase de chaque période d'activation cyclique, en ce que les dispositifs périphériques (2) sont autorisés à émettre, un par un, dans un ordre cyclique prédéterminé, par exemple lié à leur adresse d'identification et d'enregistrement auprès du dispositif central (1), et avec une fréquence de répétition, d'occurrence ou de réalisation correspondant à un sous-multiple de la fréquence de répétition des périodes limitées d'activation et en ce que les phases d'écoute desdits dispositifs périphériques (2) se répètent avec une fréquence de répétition ou d'occurrence correspondant à un sous-multiple de la fréquence de répétition des périodes limitées d'activation, lesdites fréquences de répétition étant différentes pour chaque type ou chacun des dispositifs périphériques (2), les fréquences des phases d'écoute étant, pour les mêmes dispositifs périphériques (2), supérieures aux fréquences des phases d'émission, tous les dispositifs périphériques (2) étant à l'écoute lors de chaque émission d'un message radio de synchronisation émis par le dispositif central (1).
- Procédé selon l'une quelconque des revendications 2 à 5, caractérisé en ce que, immédiatement avant chaque phase d'émission d'un message par le dispositif central (1) ou l'un des dispositifs périphériques (2), le dispositif (1 ou 2) concerné se met en situation d'écoute, et n'est autorisé à émettre qu'en l'absence de tout message radio en cours de transmission.
- Procédé selon l'une quelconque des revendications 1 à 6, caractérisé en ce que les messages adressés par les dispositifs périphériques (2) au dispositif central (1) consistent soit en des messages de routine prédéterminés indiquant une situation normale au niveau du dispositif périphérique (2) concerné et adressés obligatoirement au dispositif central (1) de manière répétitive à des instants successifs propres à chaque dispositif périphérique (2), soit en des messages aléatoires de signalisation d'un incident, d'un évènement ou d'une situation anormale, chaque message de signalisation étant transmis au dispositif central (1) durant la phase d'autorisation d'émission de la période d'activation immédiatement consécutive à l'occurrence de l'incident, de l'événement ou de la situation anormale et son émission débutant avant le début de la phase d'autorisation d'émission, lesdits messages de signalisation étant pourvus de préambules rallongés.
- Procédé selon l'une quelconque des revendications 1 à 7, caractérisé en ce que les différents dispositifs (1 et 2) sont aptes à émettre et à recevoir des signaux radio sur au moins deux canaux fréquentiels, à savoir un canal principal utilisé en fonctionnement normal et au moins un canal de repli, de rabattement ou de secours utilisé en cas de difficulté de transmission sur le canal principal, et en ce que ledit procédé consiste à basculer les transmissions radio entre dispositifs (1 et 2) du canal principal sur le ou un canal de repli à l'initiative d'un dispositif périphérique (2), après que ce dernier ait diagnostiqué une coupure de sa liaison radiofréquence avec le dispositif central (1), soit du fait de l'absence de réception, éventuellement répétée, de message radio de synchronisation à une ou plusieurs échéance(s) prédéterminée(s), soit du fait de l'absence de message de réponse ou d'accusé de réception du dispositif central (1) suite à l'envoi préalable, de manière répétée, de messages radio, en particulier de messages de signalisation d'un incident, d'un événement ou d'une situation anormale, du dispositif périphérique (2) concerné vers ledit dispositif central (1).
- Procédé selon la revendication 8, caractérisé en ce que le basculement des transmissions entre dispositifs (1 et 2) sur le ou un canal de repli consiste, pour le dispositif périphérique (2) à l'initiative dudit basculement, à basculer sur le ou un canal de repli au moment de l'avènement d'une phase d'autorisation ou d'obligation d'émission de messages(s) qui lui est attribuée selon l'ordre établi pour les différents dispositifs périphériques (2), à se mettre ensuite en situation d'écoute pendant une première durée au moins égale à la somme des durées de l'intervalle séparant deux périodes d'activation cyclique et d'une telle période, puis éventuellement, de manière répétitive, pendant les phases d'émission consécutives estimées du dispositif central (1), ce jusqu'à réceptionner un message de synchronisation décalée émis par le dispositif central (1) et fixant le nouveau rythme d'émission et d'écoute entre ledit dispositif périphérique (2) et ledit dispositif central (1) sur ledit canal de repli.
- Procédé selon l'une quelconque des revendications 8 et 9, caractérisé en ce que le basculement des transmissions entre dispositifs (1 et 2) sur le ou un canal de repli consiste, pour le dispositif central (1), après avoir relevé l'absence répétée de réception d'un quelconque message, en particulier d'un message de routine, durant plusieurs phases successives d'autorisation ou d'obligation d'émission allouées au dispositif périphérique (2) ayant basculé, à émettre durant la phase d'écoute suivante prévue dudit dispositif périphérique (2) un message de synchronisation décalée sur le canal de repli, ou successivement sur les différents canaux de repli possibles, à répéter éventuellement cette émission pendant plusieurs phases d'écoute correspondantes successives des dispositifs périphériques (2) sur le ou les canaux de repli, ce jusqu'à réceptionner un message en retour de la part dudit dispositif périphérique (2) ayant basculé, et à adresser un ou des messages, dans une ou plusieurs phases d'autorisation d'émission dudit dispositif central (1), requérant le basculement des autres dispositifs périphériques (2) sur le canal de repli considéré, le cas échéant dans l'ordre d'adressage desdits autres dispositifs périphériques (2), les phases d'émission / réception successives des différents dispositifs sur le canal principal et sur le canal de repli étant décalées temporellement, l'ordre d'adressage des périphériques (2), après leur basculement, sera le canal de repli étant soit identique à celui prévalant sur le canal principal, soit différent de ce dernier, le nouvel ordre étant dans ce dernier cas indiqué par le dispositif central (1) aux dispositifs périphériques (2).
- Procédé selon l'une quelconque des revendications 1 à 7, caractérisé en ce que les dispositifs (1 et 2) sont aptes à émettre et à recevoir des signaux radio sur au moins deux canaux fréquentiels différents et en ce qu'à chaque fenêtre temporelle successive le dispositif central (1) et les dispositifs périphériques (2) sont commutés sur un canal différent de celui utilisé pour la fenêtre temporelle immédiatement précédente, selon un ordre de succession prédéterminé desdits canaux, qui est identique pour chaque dispositif (1, 2) et qui se déroule de manière synchrone pour tous lesdits dispositifs (1 et 2).
- Procédé selon la revendication 11, caractérisé en ce que les dispositifs (1 et 2) utilisent au moins quatre canaux de communication différents et en ce que l'ordre de succession desdits canaux est sélectionné lors de la mise en route desdits dispositifs (1 et 2).
- Procédé selon l'une quelconque des revendications 8 à 10, caractérisé en ce que l'appairage d'un nouveau dispositif périphérique (2) ou le réappairage d'un dispositif périphérique (2) ayant été déconnecté par rapport au dispositif central (1), consiste, par échanges de messages radio asynchrone, à adresser au dispositif central (1) un message indiquant les caractéristiques dudit nouveau dispositif périphérique (2), notamment la fréquence de son activation pour l'émission et l'écoute, puis à transmettre à ce dernier une adresse d'identification, fixant également son ordre dans la séquence des phases d'autorisation d'émission des différents dispositifs périphériques (2) en liaison avec le dispositif central (1), un message de synchronisation initiale et un éventuel identifiant de site utilisé pour les transmissions sécurisées.
- Procédé selon l'une quelconque des revendications 1 à 13, caractérisé en ce qu'il consiste pour un dispositif périphérique (2) mobile, ayant été déplacé en dehors du champ de couverture du dispositif central (1) et ayant reçu un signal de réactivation et/ou de reconnexion ou ayant fait l'objet d'une sollicitation de ce type, à émettre en continu pendant une durée supérieure à la somme des durées d'une période d'activation des dispositifs (1 et 2) et d'un intervalle séparant deux telles périodes, une trame de signalisation contenant l'adresse d'identification ou l'identifiant attribué audit dispositif (2), puis à se mettre en situation d'écoute en vue de la réception d'une réponse du dispositif central (1), sous la forme d'un message de synchronisation initiale assortie d'une demande d'authentification, à répéter les deux opérations précédentes pour les différents canaux de transmission possibles, en commençant par le dernier canal utilisé par ledit dispositif périphérique (2) avant sa déconnexion de la centrale (1), jusqu'à réception d'une réponse de la part du dispositif central (1) ou atteinte du nombre de tentatives maximal prédéterminé, avec mise en veille ou désactivation consécutive dudit dispositif périphérique (2) considérée en cas de non rétablissement de la communication avec le dispositif central (1).
- Procédé selon l'une quelconque des revendications 1 à 14, caractérisé en ce qu'il est mis en oeuvre par un système de surveillance ou d'alarme, le dispositif central (1) consistant en une centrale d'alarme à microprocesseur pour l'exécution du programme de gestion et de pilotage dudit système et muni d'une interface de communication externe, en ce que les dispositifs périphériques (2) consistent en un ou plusieurs capteur(s), organe(s) de contrôle, organe(s) de prise d'images et/ou de sons, sirène(s), avertisseur(s), actionneurs(s), détecteur(s) et/ou dispositif(s) de communication vers un réseau.
- Procédé selon l'une quelconque des revendications 1 à 15, caractérisé en ce que chaque dispositif périphérique (2) possède deux fréquences différentes de répétition de sa période d'activation cyclique et de communication radio avec le dispositif central (1), à savoir une fréquence faible et une fréquence élevée, ledit dispositif périphérique (2) fonctionnant normalement avec le rythme de répétition faible et ledit dispositif périphérique (2) basculant vers le rythme de répétition élevé lorsque ledit dispositif (2) est sollicité ou activé ou, de manière anticipée, lorsque ledit dispositif (2) détermine l'occurrence prochaine d'une action susceptible de le solliciter ou de nécessiter l'établissement d'une communication avec le dispositif central (1).
- Système de surveillance ou d'alarme comprenant une centrale et des périphériques, formant des dispositifs indépendants et à alimentations autonomes, caractérisé en ce qu'il met en oeuvre le procédé de communication selon l'une quelconque des revendications 1 à 16.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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FR0205747 | 2002-05-07 | ||
FR0205747A FR2839593B1 (fr) | 2002-05-07 | 2002-05-07 | Procede de communication radiofrequence entre plusieurs dispositifs et systeme de surveillance mettant en oeuvre un tel procede |
Publications (2)
Publication Number | Publication Date |
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EP1363260A1 true EP1363260A1 (fr) | 2003-11-19 |
EP1363260B1 EP1363260B1 (fr) | 2009-02-04 |
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Family Applications (1)
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EP03360058A Expired - Lifetime EP1363260B1 (fr) | 2002-05-07 | 2003-05-06 | Procédé de communication radiofréquence entre plusieurs dispositifs et système de surveillance mettant en oeuvre un tel procédé |
Country Status (5)
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EP (1) | EP1363260B1 (fr) |
AT (1) | ATE422265T1 (fr) |
DE (1) | DE60326064D1 (fr) |
ES (1) | ES2322045T3 (fr) |
FR (1) | FR2839593B1 (fr) |
Cited By (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1884906A1 (fr) * | 2006-07-31 | 2008-02-06 | Siemens Building Technologies Fire & Security Products GmbH & Co. oHG | Synchronisation de niveau dans des réseaux de communication radio |
WO2008054479A2 (fr) | 2006-03-24 | 2008-05-08 | Rsialarm, Inc. | Procédé et dispositif intégrés de surveillance vidéo capable de détecter tout mouvement |
US7463145B2 (en) | 2005-09-22 | 2008-12-09 | Rsi Video Technologies, Inc. | Security monitoring arrangement and method using a common field of view |
US7835343B1 (en) | 2006-03-24 | 2010-11-16 | Rsi Video Technologies, Inc. | Calculating transmission anticipation time using dwell and blank time in spread spectrum communications for security systems |
US8081073B2 (en) | 2005-09-22 | 2011-12-20 | Rsi Video Technologies, Inc. | Integrated motion-image monitoring device with solar capacity |
US8155105B2 (en) | 2005-09-22 | 2012-04-10 | Rsi Video Technologies, Inc. | Spread spectrum wireless communication and monitoring arrangement and method |
US8714449B2 (en) | 2008-02-07 | 2014-05-06 | Rsi Video Technologies, Inc. | Method and device for arming and disarming status in a facility monitoring system |
US9189934B2 (en) | 2005-09-22 | 2015-11-17 | Rsi Video Technologies, Inc. | Security monitoring with programmable mapping |
US9472067B1 (en) | 2013-07-23 | 2016-10-18 | Rsi Video Technologies, Inc. | Security devices and related features |
US9495845B1 (en) | 2012-10-02 | 2016-11-15 | Rsi Video Technologies, Inc. | Control panel for security monitoring system providing cell-system upgrades |
US9495849B2 (en) | 2011-08-05 | 2016-11-15 | Rsi Video Technologies, Inc. | Security monitoring system |
CN106163063A (zh) * | 2016-08-29 | 2016-11-23 | 深圳先进技术研究院 | 一种无线小夜灯控制系统、控制方法及无线小夜灯 |
EP3156985A1 (fr) | 2015-10-16 | 2017-04-19 | Radio Systèmes Ingénierie Vidéo Technologies Société par actions simplifiée | Procédé et système de communication bidirectionnelle radiofréquence, avec multiplexage de transmissions rapide et lente |
WO2019207261A1 (fr) * | 2018-04-26 | 2019-10-31 | Finsecur | Procédé de communication sans-fil entre au moins un terminal de détection d'un risque autonome énergétiquement et un organe communicant |
FR3080727A1 (fr) * | 2018-04-26 | 2019-11-01 | Finsecur | Procede de communication sans-fil entre au moins un terminal de detection d'un risque autonome energetiquement et un organe communicant |
CN110610600A (zh) * | 2017-09-28 | 2019-12-24 | 代傲表计系统有限公司 | 用于传输数据的方法 |
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- 2002-05-07 FR FR0205747A patent/FR2839593B1/fr not_active Expired - Fee Related
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- 2003-05-06 AT AT03360058T patent/ATE422265T1/de not_active IP Right Cessation
- 2003-05-06 EP EP03360058A patent/EP1363260B1/fr not_active Expired - Lifetime
- 2003-05-06 DE DE60326064T patent/DE60326064D1/de not_active Expired - Lifetime
- 2003-05-06 ES ES03360058T patent/ES2322045T3/es not_active Expired - Lifetime
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EP0676733A1 (fr) * | 1994-04-09 | 1995-10-11 | Harrison Brothers (Steeplejacks) Ltd., | Système de détection et son procédé de fonctionnement |
EP0811959A1 (fr) * | 1996-06-07 | 1997-12-10 | GRUNDIG Aktiengesellschaft | Système d'alarme commandé par radio avec sous-stations et transmission sûr de données |
GB2358504A (en) * | 1997-10-11 | 2001-07-25 | Menvier | Alarm or detection system |
Cited By (22)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8155105B2 (en) | 2005-09-22 | 2012-04-10 | Rsi Video Technologies, Inc. | Spread spectrum wireless communication and monitoring arrangement and method |
US7463145B2 (en) | 2005-09-22 | 2008-12-09 | Rsi Video Technologies, Inc. | Security monitoring arrangement and method using a common field of view |
US8081073B2 (en) | 2005-09-22 | 2011-12-20 | Rsi Video Technologies, Inc. | Integrated motion-image monitoring device with solar capacity |
US9679455B2 (en) | 2005-09-22 | 2017-06-13 | Rsi Video Technologies, Inc. | Security monitoring with programmable mapping |
EP2911125A1 (fr) | 2005-09-22 | 2015-08-26 | RSIAlarm, Inc. | Dispositif de surveillance de sécurité et procédé utilisant un champ de vision commun |
US9189934B2 (en) | 2005-09-22 | 2015-11-17 | Rsi Video Technologies, Inc. | Security monitoring with programmable mapping |
WO2008054479A2 (fr) | 2006-03-24 | 2008-05-08 | Rsialarm, Inc. | Procédé et dispositif intégrés de surveillance vidéo capable de détecter tout mouvement |
US7835343B1 (en) | 2006-03-24 | 2010-11-16 | Rsi Video Technologies, Inc. | Calculating transmission anticipation time using dwell and blank time in spread spectrum communications for security systems |
WO2008015209A1 (fr) * | 2006-07-31 | 2008-02-07 | Siemens Building Technologies Fire & Security Products Gmbh & Co.Ohg | Synchronisation de niveaux avec des réseaux de communication radio |
EP1884906A1 (fr) * | 2006-07-31 | 2008-02-06 | Siemens Building Technologies Fire & Security Products GmbH & Co. oHG | Synchronisation de niveau dans des réseaux de communication radio |
US8714449B2 (en) | 2008-02-07 | 2014-05-06 | Rsi Video Technologies, Inc. | Method and device for arming and disarming status in a facility monitoring system |
US9495849B2 (en) | 2011-08-05 | 2016-11-15 | Rsi Video Technologies, Inc. | Security monitoring system |
US9495845B1 (en) | 2012-10-02 | 2016-11-15 | Rsi Video Technologies, Inc. | Control panel for security monitoring system providing cell-system upgrades |
US9472067B1 (en) | 2013-07-23 | 2016-10-18 | Rsi Video Technologies, Inc. | Security devices and related features |
EP3156985A1 (fr) | 2015-10-16 | 2017-04-19 | Radio Systèmes Ingénierie Vidéo Technologies Société par actions simplifiée | Procédé et système de communication bidirectionnelle radiofréquence, avec multiplexage de transmissions rapide et lente |
FR3042676A1 (fr) * | 2015-10-16 | 2017-04-21 | Radio Systemes Ingenierie Video Tech | Procede et systeme de communication bidirectionnelle radiofrequence, avec multiplexage de transmissions rapide et lente |
CN106163063A (zh) * | 2016-08-29 | 2016-11-23 | 深圳先进技术研究院 | 一种无线小夜灯控制系统、控制方法及无线小夜灯 |
CN106163063B (zh) * | 2016-08-29 | 2023-10-24 | 深圳先进技术研究院 | 一种无线小夜灯控制系统、控制方法及无线小夜灯 |
CN110610600A (zh) * | 2017-09-28 | 2019-12-24 | 代傲表计系统有限公司 | 用于传输数据的方法 |
CN110610600B (zh) * | 2017-09-28 | 2023-10-10 | 代傲表计系统有限公司 | 用于传输数据的方法 |
WO2019207261A1 (fr) * | 2018-04-26 | 2019-10-31 | Finsecur | Procédé de communication sans-fil entre au moins un terminal de détection d'un risque autonome énergétiquement et un organe communicant |
FR3080727A1 (fr) * | 2018-04-26 | 2019-11-01 | Finsecur | Procede de communication sans-fil entre au moins un terminal de detection d'un risque autonome energetiquement et un organe communicant |
Also Published As
Publication number | Publication date |
---|---|
ES2322045T3 (es) | 2009-06-16 |
EP1363260B1 (fr) | 2009-02-04 |
FR2839593A1 (fr) | 2003-11-14 |
ATE422265T1 (de) | 2009-02-15 |
FR2839593B1 (fr) | 2006-06-23 |
DE60326064D1 (de) | 2009-03-19 |
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