RU2470372C2 - Alarm signalling method based on monitoring proximity of receiving and transmitting radio devices - Google Patents

Abstract

FIELD: physics, signalling.

SUBSTANCE: method is intended to alert the owner of protected items to the removal of said items from a given proximity zone and is carried out with the aid of a transmitting and receiving device carried by the owner and transmitting and receiving devices attached to the protected items. The alarm signalling is implemented in that the telephone periodically transmits, via communication channels established by Bluetooth devices of the telephone and tags, alarm signalling codes that are unique to each tag and are in the form of series of interrogation radio alarm signals with set series repetition intervals for each tag and radio alarm signal repetition intervals within a series. The telephone activates warning signals identifying a tag with an activated warning upon expiry of set time periods for the transmission and return reception by the telephone of the encoded radio alarm signals, said periods being counted from the times when the telephone sends the first radio alarm signals in the series if, during these periods, the telephone does not receive at least one return radio signal with an unimpaired alarm signalling code from each of the tags.

EFFECT: high noise-immunity.

7 cl, 2 dwg

Description

The invention relates to burglar alarm systems that signal the theft or loss of things or objects based on monitoring the proximity of radio devices, one of which is with the owner, and the others are installed on protected things or objects. An advantageous field of application of the invention are alarm systems using a mobile phone, smartphone, communicator, laptop, laptop, and short-range radio communication devices / technologies (Bluetooth ™, WeeBree ™, ZigBee ™).

A known method of protecting a mobile phone and other items from theft (Utility Model Patent RU 67306, IPC (2006.01) G08B 13/00, filed February 26, 2006), based on RFID technology (Radio Frequency Identification), which uses passive or active RFID tags. The method uses the interruption of the interaction of the RFID tag with the receiving and transmitting device when the radius of their interaction is exceeded, which causes the signal device to turn on. To protect a mobile phone in the main embodiment of the method, the owner of the phone wears a signal device with a passive RFID tag on clothes, body parts, and an RFID transmitting and receiving device is installed in the phone. An RFID tag receives a coded electromagnetic signal from an RFID transceiver installed in the telephone, and sends a coded signal back, which is received by the specified transceiver of the telephone and is identified in the information processing device. Due to the small radius of interaction of the passive RFID tag with the transmitting and receiving device (3 ÷ 10 meters), when the interaction is disturbed, an alarm signal is activated in the form of an audio and / or light signal in the signal device with a passive RFID tag and / or in a mobile phone. To protect other items from theft, a passive RFID tag must be installed on these items.

The advantage of this method is the alarm about theft almost at the time of its commission. However, the disadvantages of the method are the need to emit considerable power of the electromagnetic field by the RFID transceiver to activate passive RFID tags with interaction radii of more than 1 ÷ 2 meters, the incompatibility of RFID technologies with the available mobile phones on the market and the absence of an electromagnetic emitter suitable for RFID tag activation.

A known system for searching for lost things on the basis of a mobile phone (Patent for utility model RU 80639, IPC (2006.01) Н04М 1/00, filed January 21, 2008), consisting of a mobile phone and a set of signal labels fixed on stored wearable things. The mobile phone contains means for generating and transmitting encoded radio signals connected to the microprocessor of the mobile phone, and each of the labels contains means for receiving and decoding the radio signals transmitted by the mobile phone, means for comparing information encoded in the received radio signals with the identification information stored in the label , and means for generating sound and / or light signals connected to said means for comparing information and allowing the user to update ruzhit label. In the event of the loss of an item provided with a label, the system user sends a call signal from a mobile phone, choosing the name or image of the desired item on the display. A label attached to the desired item, having caught a call signal, provides audible and / or light response signals that help the user find the desired item.

The advantage of the system is the ability to combine with existing models of mobile phones. However, the system does not solve the task of notifying the owner of a thing at the time of its loss, for example, theft.

There is also known a system for monitoring and warning the owner of a mobile phone about the phone exceeding a predetermined distance between the owner and the phone, based on continuous radio communication between the device carried by the user (key fob) and the telephone (US Patent Application US 2007/0129113. Cell Phone Alerting System IPC (2006.01) H04B 1/38, Claims Dec. 1, 2005, published June 7, 2007). The signal about the excess of the distance specified by the radiation power of the key fob is given by visual, sound or vibrational means placed in the key fob or mobile phone. In one embodiment, the key fob has transmitting means for transmitting an identifying signal of the installed power to the mobile phone, and the telephone is programmed to receive and monitor the strength of this signal and enable visual, sound or vibration warning devices installed on the phone when the distance to the key fob exceeds the specified . In another embodiment, the key fob has receiving means for monitoring the identifying signal from the secure telephone, and the telephone is programmed to transmit this signal to the key fob; The key fob is programmed to turn on the warning equipment installed in it when the specified distance between the key fob and the phone is exceeded. In the third embodiment, the key fob has receiving and transmitting means, is programmed to receive the first identifying signal from the mobile phone, and sends the second signal to the mobile phone in response to the received first signal; the mobile phone is programmed to transmit the first signal to the key fob and turn on the warning means installed in the phone when the key fob is at a set distance from the phone. In a fourth embodiment, the keyfob has receiving and transmitting means that send a first identifying signal to the telephone and then track the second signal from the telephone; the mobile phone is programmed to receive the first signal from the key fob and transmit the second signal to the key fob in response to receiving the first signal; The key fob is programmed to turn on warning means when the phone is at a predetermined distance from the key fob. The system is designed to prevent loss and minimize theft of mobile phones.

However, this system does not solve the problem of security alarm of wearable things using a mobile phone.

The closest in technical essence to the claimed invention (prototype) is a method of burglar alarm of wearable things, based on monitoring of radio proximity and described in European patent EP 2122593 (A1) Radio Proximity Monitoring, published December 25, 2009, IPC: G08B 13/14, and in international application WO 2008087409 (A1) and in US patent application US 2010/0156624, IPC (2006.01) G08B 1/08, H04B 7/00, published June 24, 2010. According to this method, to prevent loss of things, their proximity to the owner is tracked using radio devices, one of which finds owner, while others are secured by protected items.

In the general form of the prototype method, proximity monitoring is performed using equipment containing: a transmitting device that transmits electromagnetic signals; a receiving device that receives electromagnetic signals in order to establish communication between the devices; and a proximity monitoring module that monitors the proximity of the transmitting and receiving devices using electromagnetic signals, while the transmitting device can be configured to transmit electromagnetic signals with a set of different transmission powers, each of which corresponds to its installed proximity.

In preferred embodiments of the method, electromagnetic signals are radio signals and utilize Bluetooth near-field radio technology, using a tag attached to wearable items or objects and containing a Bluetooth transceiver as the transmitting device, and a mobile phone worn by the owner of the protected items as the receiving device , and also containing a Bluetooth transceiver, while proximity tracking is carried out by measuring the parameters of the signal emitted by the transmitting device and received a receiver in the proximity monitoring module located on the mobile phone. When turned on, the Bluetooth devices in the tags and the mobile phone establish radio channels for data exchange by transmitting, receiving and processing encoded radio signals corresponding to the Bluetooth radio protocol, while the Bluetooth devices work with automatic adjustment of the transmission power for the initial establishment of reliable radio communication (pairing mode - PARING). When entering the security mode, the power control function is disabled by calling the low level function in the tag containing Bluetooth from the telephone, which does not require access to the low level Bluetooth functions on the telephone. Such access is usually not allowed for applications running on the phone, as mobile phones use standard high-level applications. Disabling the power adjustment in the tag disables the adjustment of the transmit power in the phone due to the pairing of the Bluetooth devices of the tag and the phone. Therefore, in the armed mode, the Bluetooth transmitting devices of the tags and the phone transmit radio signals of predetermined fixed powers, each of which corresponds to a certain proximity, when the automatic power adjustment in the Bluetooth devices is turned off. Proximity tracking is carried out by the proximity monitoring module located in the phone. In a simple implementation of the method, proximity is determined by the measured strength of the received signal (RSSI - Received Signal Strength Indication) from each of the tags, and a decrease in the signal from any tag to a set minimum means the tag is getting out of a given proximity guard zone, which leads to turn on the alarm. The proximity zone for each tag is set by setting the corresponding fixed radiation power in it. In a more perfect form of the method, to determine the proximity of the tag from the receiver, a measurement of the received signal strength (RSSI) and the quality of the Bluetooth connection are used, which is determined by the coefficient of occurrence of erroneous bits in identification codes (BER - Bit Error Rate) transmitted by encoded radio signals supporting the communication channel . In an even more advanced embodiment of the method for tracking the distance between two Bluetooth devices (tags and phones), in addition to the measured received signal strength (RSSI) and bit error rate (BER) of the Bluetooth connection, data of the connection delay counter showing the number of attempts spent by Bluetooth devices to establish the correct connection (multiple attempts to reconnect are provided by the Bluetooth radio protocol). It is also possible to use the correlation between two or more of these measured values to monitor proximity. In these combined forms for determining the proximity of the tag and the phone, modeling is used to determine the reliability of the interruption of the connection and the alarm when the tag leaves the proximity zone, while the models use received signal strength measurements (RSSI), Bluetooth bit error rate (BER) -connections and readings of the connection delay counter.

The advantage of the prototype is the ability to use widespread mobile phones with built-in Bluetooth devices, without hardware alterations, and tags using industrially produced miniature Bluetooth devices to create a security alarm system for personal belongings of the owner of a mobile phone. However, the implementation of the security alarm system according to the prototype method has the following disadvantages:

1. Establishment of the fact that the tag exited the specified security zone of proximity based on the Bluetooth protocol of near radio communication involves repeated repeated requests when the return signal from the tag is not received, after which an alarm is activated. This time increases with the use of combined forms of determining proximity using simulation to determine the reliability indicator of interruption and the inclusion of an alarm. As a result, the alarm about the loss of the tag occurs no earlier than 5-7 seconds after the response of the tag disappears, i.e. after the tag leaves the security zone, which is confirmed by tests of the commercial security alarm system nio ™ Bluetooth alarm (bluenio), website: http://www.bluenio.co.uk, which implements the prototype invention and was developed by the patent holder - Tenbu Technologies Limited, an English company. During this time, a stolen item equipped with a tag can be moved, especially in the case of a deliberate theft in a crowded place, to a sufficient distance that precludes the possibility of returning it, but the security alarm system will not detect this in a timely manner.

2. The use of an alarm counter in the security alarm system according to the prototype method, showing the number of attempts spent by Bluetooth devices to establish the correct connection, leads to low noise immunity of the security alarm, since in the presence of interference, the counter quickly fills due to violation of radio signal codes and false switching on anxiety.

3. The use of mobile phones for alarm systems with software built on the basis of high-level functions (which is implemented in the prototype method) requires the program specified by the program to access the Bluetooth device established by the manufacturer, in which the interval between requests for the presence of tags in the security zone is 6 ÷ 10 seconds. During this interval, the tag may leave the security zone at a sufficiently large distance, and this output will not be detected by the security alarm in a timely manner. This disadvantage does not allow the use of the invention of the prototype for the protection of things in the area of direct proximity to the owner.

4. The use of commercial mobile phones with Bluetooth devices, the software of which is based on high-level functions, in the security alarm mode with Bluetooth tags, blocks access to other phone functions, except for answering an incoming call. This requires exiting the security mode in order to use other phone functions, for example, if necessary, to call the subscriber, which limits the security system's capabilities.

The main task solved by the claimed invention is the creation of a security alarm method based on monitoring the proximity of receiving and transmitting radio devices, mainly mobile phones and Bluetooth devices, which provides express signaling to the owner of wearable items about their disappearance from the zone of close proximity to the owner, component 0.5 ÷ 3 meters, with a time delay of not more than 0.5 ÷ 2 seconds. This will allow the owner to detect the theft at the time of its commission and take emergency measures to identify the kidnapper and return the stolen item even in a crowded place, for example, in the subway, where it is easy for the thief to get lost in the crowd. In addition, such an alarm reminds the owner of forgotten things, which prevents their loss. The universality of using this method for the protection of things and objects in extended security zones, for example, 5–10 or 20–50 meters, is also envisaged.

The claimed invention also solves the problem of increasing the noise immunity of the security alarm.

Another objective is to simplify the alarm systems that implement the method by eliminating the alarm devices in tags that are ineffective, as they can be easily drowned out or disabled by the thief.

The problem to be solved is also the preservation of the undisturbed functioning of the standard mobile phone software using high-level applications in the security alarm mode.

The essence of the claimed invention in all forms of its implementation is expressed in the following set of essential features:

- a security alarm method based on monitoring the proximity of a receiving and transmitting radio device using a base receiving and transmitting radio device worn by the owner of the protected items or objects and one or more tag tags of receiving and transmitting radio devices attached to these things or objects in which the "base" transmits, receives from the "tags" and processes the encoded radio signals that support the communication channel, creating radio channels for exchanging data with the "tags", forms an individual enter the database of identification information about the “tags” and about the alarms for each of the “tags”, and includes an alarm when there is a radio communication failure with at least one of the “tags” identifying a “tag” with an activated alarm, and each of the “tags” "Carries out the reception, processing and reverse transmission of coded radio signals supporting the communication channel to create a stable radio channel of communication with the" base ", while in the" base "and" tags "set the specified fixed transmit power, different from the prototype in that for ocher For this alarm system, coded radio signals of the security alarm system are used, transmitted by the “base” and “tags” through common communication channels created and supported by coded radio signals designed to maintain the communication channel, while the “base” generates and stores alarm codes for each of "tags", periodically forming a series of questionnaires radio alarm signaling set for each of "tags" repetition periods T _i series and repetition periods τ _i of radio signals Store signaling within the series, their transmission, a reverse reception and decoding, and activation of the alarm signals identifying "tags" with an activated alarm, "base" produces after a predetermined time t _Wi gear and reverse reception "base" coded radio burglar alarms, measured from the moments when the base sends the first radio signals of the burglar alarm in series equal to t _Wi = (0.7 ÷ 1) T _i , where i is the tag number, if during these intervals it does not receive at least one return radio signal with no disturbance security alarm code from each of the “tags”.

In most forms of implementation, the security alarm method differs from the prototype in that the periods τ _i of the signaling of the security signal inside the series with periods T _i specified for each tag are set to τ _i = 0.001 ÷ 0.1 T _i .

In a preferred form of a general implementation form, the security alarm method differs from the prototype in that a “mobile phone” or other similar device is used as a “base”, the mobile phone and the “tag” equipped with Bluetooth transceivers and use Bluetooth radio technology.

In an important particular case of the preferred implementation form, the security alarm method differs from the prototype in that low-level functions are used for the security software of a mobile phone, allowing the security alarm method to be implemented while maintaining the normal operation of standard mobile phone software using high-level applications.

In the most important practical form for the practical implementation of the security alarm method that implements its advantages in the near security zone, the method differs from the prototype in that for express informing the owner of the "base" about the loss of personal items or objects equipped with a "tag", the radio signal power emitted by the "tag" during setup is set equal to the value at which a violation of the integrity of the security alarm code in the security signal transmitted by the "tag" occurs in "Base" with a distance between the "tag" and the "base" of 0.5 ÷ 3 meters, while the time interval t _Wi allocated for the passage of at least one unbroken send and receive radio signals of the security alarm with a repetition period τ _i is set to 0.5 ÷ 2 seconds.

In another specific form of implementing the security alarm method, the difference from the prototype is that for signaling to the driver of the vehicle about the loss / theft of cargo or airborne attachments, the power of the radio signal emitted by the "tag" when setting is set to the value at which the integrity of the security code is violated alarm in the security signal transmitted by the "tag" occurs in the "base" with a distance between the "tag" and the "base" equal to 5 ÷ 10 meters, while omezhutok t _Wi, dedicated to the passage of at least one unbroken sending and receiving radio signals, alarm signaling with a repetition period τ _i, is set to 3-8 seconds.

In a possible alternative form of implementing the security alarm method, the difference from the prototype is that for signaling to parents and / or kindergarten teachers about the exit of children with “tags” from the security zone, the radio signal power emitted by the “tag” is set equal to the value at which the violation of the integrity of the security alarm code in the security alarm transmitted by the “tag” occurs in the “base” with a distance between the “tag” and the “base” equal to 20–50 meters, while th interval t _Wi, dedicated to the passage of at least one unbroken sending and receiving radio signals, alarm signaling with a repetition period τ _i, is set equal to 8 ÷ 15 seconds.

The technical result achieved by using the proposed method of burglar alarm is as follows:

- The presence of “tags” in the security zone is monitored at a predetermined periodicity T _i selected depending on the radius of the security zone, with a response being received within the specified time intervals t _Wi transmissions and the base receiving the encoded radio signals of the security alarm and receiving an alarm after these intervals, if the “base” has not received at least one return radio signal with an intact security alarm code from each of the “tags”. As a result, the alarm occurs with a given fixed delay t _Wi from the beginning of the polling period T _i , in contrast to the prototype method, where this delay does not have a specific value.

At the same time, the polling periods T _i and time intervals t _Wi practically have no restrictions on the side of small time values and are set so that the possible removal of the “tag” outside the security zone at time intervals t _{Wi is} acceptable for urgent measures to detect and return protected things or objects. The absence of this limitation is also achieved due to the fact that the security software of the mobile phone in the claimed invention is constructed using low-level functions, which eliminates the software delay of the polling of tags, existing in the prototype invention due to the use of high-level software (for example, Java). This is especially important in the near security zone of 0.5 ÷ 3 meters, used to protect things in the hands and body of the owner of the phone. Setting the time interval t _Wi allocated for the passage of at least one undisturbed sending and receiving of radio signals of the security alarm with a repetition period τ _i of 0.5 ÷ 2 seconds for this zone, provides the express informing the owner about the loss of the thing and the ability to take urgent measures to detention of the kidnapper and return of the thing. The specified time intervals t _{Wi of the} survey in the middle and large security zones (indicated in paragraphs 6 and 7 of the claims) give the owner of the security system the confidence to receive the results of the survey of “tags” with a constant predetermined periodicity T _i that limits the possible distance of the “tag” beyond security zone, which improves their assessment of the situation in the protected zone.

- The proposed method allows to increase the noise immunity of the security alarm, since confirmation of the presence of a “tag” in the security zone requires the receipt of at least one return radio signal with an intact security alarm code during the polling of the “tag” with a series of interrogation pulses.

- The proposed method allows to simplify the system by eliminating the alarm devices in the "tags", which are ineffective, as they can be easily drowned or disabled by the thief.

- The proposed method enables the owner of the mobile phone to use all the functions of the phone at the same time as the alarm system due to the construction of the security software for the mobile phone using low-level functions that allow the alarm system to be maintained while maintaining the standard software of the mobile phone using high-level applications.

The invention is illustrated by drawings, in which:

- figure 1 presents a structural diagram of a security alarm system that implements the proposed method of security alarm in the General form of its implementation, corresponding to claim 1 of the claims;

- figure 2 shows a structural diagram of a burglar alarm system using a mobile phone and a "tag" with Bluetooth transmit-receive devices, in accordance with paragraph 3 of the claims.

The proposed security alarm method in a general implementation form (FIG. 1) uses a “base” 1 transmitting and receiving device worn by the owner of the protected things or objects, and one or more “tag” 2 transmitting and receiving devices fixed to the protected things or objects. “Base” 1 transmits / receives using the transmit-receive unit 3 and processes encoded radio signals 5 in the processor 4 that support the communication channel, creating radio channels 6 for exchanging with “tags” 2, and also forms an individual record in the database 7 of identification information about "Tags" 2 and about alarms for each of the "tags" 2. In addition, the "base" 1 using block 8 includes an alarm when there is a radio communication failure with at least one of the "tags" 2, identifying the "tag" with an activated alarm . It can be audible, vibrational and visual alarm on the display screen 9. On the display 9 displays the identification image of the "tags" and produce visualization of tags with activated alarm. The creation of an alarm identifying a "tag" with an activated alarm is performed using information about alarms for each of the "tags" stored in the database 7. Each of the "tags" 2 receives using the transmit-receive unit 10, processing the processor 11 and the reverse transmission by the block 10 of the encoded radio signals 5 supporting the communication channel to create a stable radio communication channel 6 with the "base". This radio channel 6 data exchange "base" - "tag" is used for burglar alarm both in the invention prototype and in the claimed invention. To implement the method of burglar alarm, the transmission power of radio signals in the transmitting and receiving unit 3 of the "base" 1 and the receiving and transmitting units 10 of the tags 2 are set fixed.

The difference of the proposed method from the prototype is that for burglar alarms use coded radio signals of burglar alarms 12 transmitted by the “base” 1 and “tags” 2 through common communication channels 6 created and supported by coded radio signals 5 designed to maintain a communication channel. In this case, the “base” 1 generates and stores in its database 7 alarm codes for each of the “tags” 2, periodically generates in the processor 4 a series of interrogating radio signals of the security alarm with the periods T _i of the series and repetition periods τ _i burglar alarm signals within the series, their transmission, reception of the reverse transmitting-receiving unit 3 and the decoding processor 4. to form the series of radio signals using questionnaires burglar alarm codes, and also means th T _i and τ _i for each of the "tags" are used as short-modulating impulses and such a high carrier frequency, to provide a serial poll all the "tags" for the time being, at least 100 times smaller than the smallest period of the survey "tags." When the “tag” 2 is in the security zone, the radio connection with the “tag” is stable, and after decoding in the processor 4 of each of the series of polling alarm signals received from the “tag”, the security alarm code is restored, which coincides with the code stored in the database 7 for the corresponding tag. The processor 4 verifies the correspondence of the restored alarm codes with the codes stored in the database 7 for all “tags” during the time intervals 13 of _Wi transmissions specified in the timer 13 and for the base to receive the encoded faceted radio signals counted from the moments sent by the base »Of the first radio signals of the burglar alarm in series equal to t _Wi = (0.7 ÷ 1) T _i , where i is the number of the" tag ", and if there are response signals, it blocks the inclusion of an alarm. When the "tag" 2 leaves the security zone or when it is located on the border of this zone, the response signals from the "tag" transmitted by the transmit-receive unit 10 of the "tag" 2 and received by the transmit-receive unit 3 of the "base" 1 may be absent or have Distorted alarm code. In this case, the processor 4, comparing the result of decoding the security alarm response signals from the “tag” with the security alarm code stored in the database 7 for this tag, will detect the absence of a signal or a mismatch of the security alarm code, and after the time t _W set in timer 13 for of this tag, will turn on the alarm through the alarm enable block 8 and visualize the "tag" with the activated alarm on the display 14. If there are several "tags", the processor 4 of the "base" 1 will turn on the alarm identifying th tag with an activated alarm, after the set intervals of t _Wi transmissions and reverse reception by the base of the coded security signals, counted from the moments when the base sends the first security signals in series and equal to _Wi = (0.7 ÷ 1) T _i , if during these periods the “base” has not received at least one return signal with an intact security alarm code from each of the “tags”. The installation of the periods T _i of the series of interrogation radio signals of the security alarm "tags" 2, as well as the periods of τ _i of the radio signals of the security alarm inside the series, is performed in the processor 4; these periods are set different for the near, medium and large security zones. Setting the waiting time for the response radio signals "tags" 2 with the intact security alarm code t _{wi is} carried out in timer 13.

The maximum waiting time t _Wi cannot exceed the period T _{i of the} security interrogation of “tags” 2; on the other hand, it is impractical to make it less than 0.7 T _i in order to increase the likelihood of receiving return radio signals from “tags” 2 with an intact security alarm code. A compromise choice is t _Wi = 0.9T _i , which will give good reliability of the hardware with an increased due to this time the probability of receiving returnable radio signals with an unbroken alarm code from the "tags" 2.

The follow-up periods τ _i of the security signal radio signals within the series of interrogation radio signals of “tags” 2 are set in the processor 4 in the range τ _i = 0.001 ÷ 0.1 T _i , which ensures the simplicity of the technical implementation of creating a series of interrogation radio signals in the processor 4 and the transmit-receive unit 3 The security alarm mode is activated using the keypad 14, which can also be used to select identification tags. To power the "base" use the battery 15, the "tag" is a permanently turned on power supply 16.

In a preferred form of a general implementation form of the inventive security alarm method (FIG. 2), a mobile phone 17 or other similar device (smartphone, iPhone, communicator, laptop, laptop) is used as a “base”, moreover, the mobile phone and “tag” 18 are equipped with a reception Bluetooth transmitters 19, 20 and use Bluetooth radio technology (Website: http://www.bluetooth.com/Bluetooth/SIG/; Institute of Electrical and Electronics Engineers Standard IEEEStd 802.15.1-2005, Website : http://ieeexplote.ieee.org/; Website: http://en.wikipedia.org/wiki/Bluetooth). This allows you to reduce the cost of implementing the method by using a mobile phone of the owner of the protected things without hardware alterations of the phone, taking into account the presence of a built-in Bluetooth device in modern mobile phones, and cheap, high-tech and economical Bluetooth devices (chips). The mobile phone 17 has no hardware alterations and is equipped with a display 21, a keyboard 22 and standard software 23 using high-level applications, as well as a built-in Bluetooth device 19 and a battery 24 to ensure regular operation of the phone. To implement the security alarm method, additional security alarm and security software 25 with the Bluetooth device 19 is introduced into the telephone 17. The Bluetooth devices 19 and 20 in the telephone 17 and the "tag" 18 have transmitting and receiving units 26, 27 that carry out radio communication of the telephone and tags, and processors 28 and 29. The processor 28 is intended for the software of the Bluetooth protocol for radio communications of the mobile phone with “tags”, and the processor 29 for the Bluetooth protocol for the radio communications of the “phone” with the mobile phone 17. Bluetooth device 20 in “b Rka ”18 also has hardware for setting the radiation power 30 and disabling automatic adjustment of the radiation power in the guard mode, with which, when setting, the radius of the“ tag ”security zone is determined, which is determined by the power of the radio signal emitted by the“ tag ”18. The“ tag ”18 has burglar alarm software 31, which decodes the burglar alarm signals received by the tag, compares them with the burglar alarm code stored in the “tag”, and if they coincide, it generates and transmitting the security alarm signal to the telephone 17 through the processor 29 and the transmitting and receiving unit 27 of the Bluetooth device 20. This software can be installed in the processor 29 of the Bluetooth device 20, if its volume allows, or is installed in an additional processor. The "tag" 18 is continuously powered by the power supply 32 during its service life, which for the "tags" operating in the near security zone can be 1 ÷ 2 years.

In an important particular case of implementing the security alarm method using a mobile phone 17 and a “tag” 18 containing Bluetooth devices 19, 20, the difference from the prototype invention is that low-level functions are used for security software 25 of the mobile phone (native software software), allowing to implement a method of burglar alarm while maintaining the uninterrupted functioning of standard software for a mobile phone using high-level applications (on Example, JAVA). Low-level applications for burglar alarms differ only in what operating system they are written for, and will be protected by certificates for registering a computer program. Due to the construction of security software 25 based on low-level applications, the “tags” survey does not require access to high-level applications in the standard software of 23 phones, therefore, the “tags” are polled in the near security zone with a period T _i = 0.5 ÷ 2 s, significantly less than the interval established by the manufacturer between requests for the presence of tags in the security zone, comprising 6 ÷ 10 seconds when using high-level applications.

The security alarm software 25 performs the following functions:

- Setting the periods T _{i for} the series of interrogation radio signals of the burglar alarm for each of the "tags";

- Setting the periods τ _{i of the} following radio signals of the burglar alarm inside the series;

- Introduction to the database: identification information about the "tags"; information about alarms for each of the "tags"; burglar alarm codes for each of the tags;

- Setting in the timer the waiting time for response radio signals "tags" with the intact alarm code t _Wi = (0,7 ÷ 1) T _i ;

- The inclusion of an alarm with the identification of alarming "tags";

- Conclusion on the display 21 of security information.

The security alarm method according to the invention in the form of implementation using a mobile phone 17 and a "tag" 18 containing Bluetooth devices 19, 20 (Fig. 2) is as follows.

Bluetooth radio communication is made in the free from licensing range 2.4-2.4835 GHz. Bluetooth uses a spread spectrum method with frequency hopping FHSS (Frequency Hopping Spread Spectrum). The FHSS method is simple to implement, provides resistance to broadband interference, and the equipment is inexpensive. According to the FHSS algorithm in Bluetooth, the carrier frequency of the signal changes stepwise 1600 times per second (a total of 79 working channels with a width of 1 MHz are allocated). The frequency switching sequence for each connection is pseudo-random and is known only to the transmitter and receiver, which every 625 μs (one time slot) are synchronously tuned from one carrier frequency to another. Thus, if several pairs of transmitter and receiver work nearby, then they do not interfere with each other. This algorithm is also an integral part of the system for protecting the confidentiality of transmitted information: the transition occurs according to the pseudo-random algorithm and is determined separately for each connection. When transmitting digital data (64 kbit / s in both directions), various coding schemes are used, and digital data in case of loss of the information packet will be retransmitted. Without error-correcting coding, this ensures data transfer at 433.9 kbit / s in both directions. The Bluetooth protocol supports not only a point-to-point connection (from point to point), but also a point-to-multipoint connection (from point to many points).

The code packets used for modulating carrier frequencies and generating coded radio signals via the Bluetooth radio communication protocol contain code blocks supporting a communication channel and code blocks for transmitting user information, i.e. alarm codes. Blocks of codes that support the communication channel contain information about the addresses of tags, about the set transmit power, about the beginning and end of the transmission of security alarm codes, about the set synchronous carrier frequency in the next communication session, about codes for checking the integrity of the information transmitted by the packet, and other information to maintain communication channel. After modulating the carrier frequency, they create the coded Bluetooth radio signals of the radio protocol 33, supporting the communication channel (figure 2). The blocks of alarm codes after modulation of the carrier frequency create coded radio signals of the alarm 34, interfaced with the Bluetooth radio protocol. The coded radio signals 33 supporting the communication channel and the coded radio signals of the security alarm 34 are transmitted on the air in a single stream. When you first turn on the security alarm system (figure 2), using a mobile phone 17 with security alarm software 25, and "tags" 18 with Bluetooth devices 19 and 20, the software 25 initializes the Bluetooth connections, including pairing (PAIRING - pairing ) Bluetooth devices, the task of which is to create secret communication keys that ensure radio communication only between Bluetooth devices included in the security system, as well as mutual authentication of these devices. When pairing, the Bluetooth device 19 in the phone is the main one (MASTER), and the Bluetooth device 20 in the "tags" 18 is the slave device (SLAVE). Before starting the pairing procedure, you must enter the PIN codes (Personal Identification Number) of all the Bluetooth devices included in the system. PIN codes are selected by the user of the system and entered from the keyboard 22 into the processors 28, 29 of the Bluetooth devices and into the software database 25, in the tag identification information section. Immediately after entering the PIN codes, the processors 28, 29 of the Bluetooth devices begin pairing according to the E22, E21 algorithms of the Bluetooth radio protocol, operating with the BD_ADDR address of the Bluetooth device (a hardware 48-bit device address assigned by the manufacturer and allowing it to be uniquely identified) and the PIN entered device code. The Bluetooth device communication key is created using the E21 algorithm of the Bluetooth radio communication protocol, which requires a BD_ADDR device address, a 128-bit randomly generated number (LK_RAND) used for exchange with other Bluetooth devices, and the value of the number (LK_RAND) of another devices (other devices) with which the device in question is associated. These values are stored in the memory of each Bluetooth device.

After pairing the Bluetooth devices, they are mutually authenticated, i.e. communication check in two directions on the created communication channels. It is carried out by the processors 28, 29 of the Bluetooth devices 19, 20 according to the “request-response” scheme using the E1 algorithm of the Bluetooth radio protocol operating with BD_ADDR addresses, communication keys and randomly generated 128-bit words transmitted from one Bluetooth device to another in two directions (33 in figure 2). The algorithm includes checking the correctness of the transmission of generated words.

According to the results of the pairing procedure, the security alarm software 25 enters identification information about the “tags” into the database of the mobile phone 17: PIN codes, BD_ADDR addresses (registration). The software 25 also allows you to give the BD_ADDR address a semantic textual, illustrative and audio identification. Typical Bluetooth software has a standard set of identifiers, but allows the user to use their own names, graphics and audio identifiers if desired. In addition to the identification information about the “tags”, the software 25 enters into the database information about alarms for each of the “tags” and alarm codes for each of the “tags”.

After the system is armed with the keypad 22 of the mobile phone 17, the security alarm program 25 puts the Bluetooth device 19 in the phone 17 into constant power mode and activates the connection of this Bluetooth device with the Bluetooth devices 20 located in the “tags” 18, setting in them a mode of operation with predetermined constant radiation powers. The software 25 of the mobile phone 17 periodically generates a series of interrogating radio signals of the security alarm 34 with the periods T _i for each of the tags following the series and the periods τ _i , following the radio signals of the security alarm inside the series, their transmission through the transmitting and receiving unit 26 of the Bluetooth device 19 telephone, the reverse reception of these radio signals from the transmitting and receiving units of 27 Bluetooth devices 20 "tags" and their decoding. The security alarm codes obtained in this way, as well as the BD_ADDR addresses of the Bluetooth devices 20 “tags” 18, from which the answer came, are compared with the information from the software database 25, and when they match, they are accumulated in the software buffer 25 separately for each “ tags. " After the time intervals t _{Wi of the} transmissions set for each of the “tags” and the reverse reception of the series of encoded radio signals of the security alarm 34, counted from the moments when the phone sent the first 17 radio signals of the security alarm in series and equal to _Wi = (0.7 ÷ 1) T _i , where i is the tag number, the software 25 turns on the alarm if, during these periods, the mobile phone 17 does not receive at least one return radio signal with an intact security alarm code from each of the tags. Time intervals t _Wi are set in the software timer 25. The inclusion of an alarm is accompanied by identification of alarm tags and visualization of tags with an activated alarm on the display 21 of the mobile phone.

The security alarm software 25 sequentially polls the “tags” taking into account the periods T _i of the series of interrogation radio signals of the security alarm and the periods τ _i of the radio signals of the security alarm within the series for each of the tags, generating coded radio signals of the security alarm in such a way as to prevent overlapping of these signals.

The radius of the security zone, i.e. the distance at which the "tag" - "base" connection is broken is determined by the radiation power and the sensitivity of the "tag" transmitter-receiver. When using commercial “Bluetooth” devices in “tags”, it should be assumed that their sensitivity is approximately the same, and the range is determined by the class of the device, which is uniquely related to the maximum radiation power P _MAKC . Class 1 Bluetooth devices have P _MAKC = 100 mW and a radius of 100 m, Class 2 devices have P _MAKC = 2.5 mW and a radius of 10 m, and devices of class 3 P _MAKC = 1 mW and a radius of 1 m. radius of action can be produced by circuit means for setting a fixed radiation power (30 in FIG. 2).

In the most important practical form for the practical implementation of the security alarm method according to claim 1 or 3 of the claims, which implements its advantages in the near security zone for express informing the owner of the "base" about the loss of personal items or objects equipped with a "tag", the radio signal power, emitted by the "tag", when setting is set equal to the value at which the violation of the integrity of the security alarm code in the security signal transmitted by the "tag" occurs in the "base" p and the distance between the "tag" and "base", equal to 0,5 ÷ 3 meters, wherein the time interval t _Wi, dedicated to the passage of at least one unbroken sending and receiving radio signals, alarm signaling with a repetition period τ _i, is set to be 0.5 ÷ 2 seconds. For this purpose, in the "tag" it is advisable to use class 3 Bluetooth devices.

In another specific form of embodiment of the security alarm method according to claim 1 or 3 of the claims, for signaling to the driver of a motor vehicle about the loss / theft of cargo or airborne attachments, the power of the radio signal emitted by the "tag" when setting is set equal to the value at which the integrity violation the security alarm code in the security alarm signal transmitted by the "tag" occurs in the "base" with a distance between the "tag" and the "base" of 5 ÷ 10 meters, while the time period ok t _Wi allocated for the passage of at least one undisturbed sending and receiving of radio signals of the security alarm with a repetition period τ _i , is set equal to 3 ÷ 8 seconds. For this purpose, in the "tag" it is advisable to use class 2 Bluetooth devices.

In a possible alternative form of implementing the security alarm method according to claim 1 or 3 of the claims, for signaling to parents and / or kindergarten teachers about the exit of children with “tags” from the security zone, the radio signal power emitted by the “tag” is set when setting equal to the value at which a violation of the integrity of the security alarm code in the security signal transmitted by the "tag" occurs in the "base" with a distance between the "tag" and the "base" of 20 ÷ 50 meters, while the time t _Wi allocated for the passage of at least one undisturbed sending and receiving of radio signals of the security alarm with a repetition period τ _i is set to 8 ÷ 15 seconds. In this case, it is advisable to use class 1 Bluetooth devices in the “tag”.

The proposed method of burglar alarm can be implemented using other, similar to Bluetooth, devices / technologies for short-range radio communications, such as WeeBree ™, ZigBee ™, using the accepted radio protocols for them.

Claims (7)

1. A security alarm method based on monitoring the proximity of a receiving and transmitting radio device using a base receiving and transmitting radio device worn by the owner of the protected items or objects and one or more tag tags of receiving and transmitting radio devices attached to these things or objects in which the "base" transmits, receives from the "tags" and processes encoded radio signals that support the communication channel, creating radio channels for exchanging data with the "tags", forms an individual enter the database of identification information about the “tags” and about the alarms for each of the “tags”, and includes an alarm when there is a radio communication failure with at least one of the “tags” identifying a “tag” with an activated alarm, and each of the “tags” "Carries out the reception, processing and reverse transmission of coded radio signals supporting the communication channel to create a stable radio communication channel with the" base ", while the" fixed "and" tags "set the specified fixed transmit power, characterized in that for the security signal The nations use coded radio signals of the security alarm transmitted by the “base” and “tags” via the common communication channels created and supported by the coded radio signals, while the “base” generates and stores the alarm codes for each of the “tags” in its database, periodically produces forming a series of questionnaires radio alarm signaling set for each of "tags" repetition periods T _i series and repetition periods τ _i of radio burglar alarms within the series, their transmission, etc. reverse cm and decoding, and activation of the alarm signals identifying "tags" with an activated alarm, "base" produces after a predetermined time t _Wi gear and reverse reception "base" coded radio burglar alarms, measured from the time of sending the "base" of the first radio burglar alarms in series and equal to t _Wi = (0.7 ÷ 1) T _i , where i is the tag number if during these periods it has not received at least one return radio signal with an unbroken alarm code from each of the “tags”. 2. The method according to claim 1, characterized in that the periods τ _i of the signaling of the security alarm inside the series with periods T _i specified for each tag are set equal to τ _i = 0.001 ÷ 0.1 T _i . 3. The method according to claim 1, characterized in that as the "base" use a mobile phone or other similar device, moreover, the mobile phone and the "tag" are equipped with Bluetooth transmit and receive devices and use Bluetooth radio technology. 4. The method according to claim 3, characterized in that the low-level functions are used for the security software of the mobile phone, allowing the security alarm method to be implemented while maintaining the normal operation of standard mobile phone software using high-level applications. 5. The method according to claim 1 or 3, characterized in that for express informing the owner of the "base" about the loss of personal items or objects equipped with a "tag", the power of the radio signal emitted by the "tag" when setting is set to the value at which the violation the integrity of the security alarm code in the security alarm response signal transmitted by the “tag” occurs in the “base” with a distance between the “tag” and the “base” of 0.5 ÷ 3 m, while the time interval t _Wi allocated for passing at least one undisturbed sending, etc. EMA radio burglar alarm having the repetition period τ _i, is set equal to 0,5 ÷ 2. 6. The method according to claim 1 or 3, characterized in that for signaling the driver of the vehicle about the loss / theft of cargo or airborne attachments, the power of the radio signal emitted by the "tag" when setting is set equal to the value at which the violation of the integrity of the security alarm code in the security alarm signal transmitted by the "tag" occurs in the "base" with a distance between the "tag" and the "base" of 5 ÷ 10 m, while the time interval t _Wi allocated for passing at least one undisturbed equalization and reception of radio signals of the security alarm with a repetition period τ _i , set equal to 3 ÷ 8 s. 7. The method according to claim 1 or 3, characterized in that for signaling to parents and / or kindergarten teachers about the exit of children with "tags" from the security zone, the power of the radio signal emitted by the "tag" is set equal to the value when setting wherein a violation of the integrity of the security alarm code in the security alarm response signal transmitted by the “tag” occurs in the “base” with a distance between the “tag” and the “base” of 20 ÷ 50 m, while the time interval t _Wi allocated for passing at least one undisturbed ki and receiving radio signals of the security alarm with a repetition period of τ _i , set equal to 8 ÷ 15 s.

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