KR100189289B1 - Security arrangement - Google Patents

Abstract

The communication system includes a number of transceivers capable of transmitting and receiving data to and from other transceivers in the system. At least one transceiver functions as one control module. Communication between the control module and the rest of the communication module is caused by continuous communication between individual communications in the system. This can be used for low power transceivers to form a system with long range capability.

Description

Communication systems

1 is a block diagram of a system according to the present invention.

2 is a block diagram of the FIG. 1 system module.

* Explanation of symbols for main parts of the drawings

10: communication system 11-15: control module

21: RF oscillator 22: RF chip

23: memory device 24: logic chip

30: wireless transmitter 31: wireless receiver

32: aerial

The present invention relates to a communication system including a plurality of communication modules and at least one control module, and to a communication contact with a controller directly or indirectly at each station. This type of communication system allows data from cash to communicate with security devices, such as buildings and automobiles, security devices to ensure that data transmitted within the data transmission system is safe from external influences, and central saving controls. It is used to form various kinds of systems such as a device for

Known communication systems of this kind include one control module and a plurality of communication modules which are separated from one another and from each other. If a communication system is being used as a security device for a building, each communication module will be located in a location prone to attack by buildings such as window latches and door locks.

The control module can be placed in a convenient location. In a known communication system, the control module communicates directly with each station, so communication between neighboring stations is not possible.

The problem in the known communication system is that the power of the control module is sufficient to allow communication between the control module and the farthest communication module. In many cases it is necessary to have at least some communication modules remote from the control module. This causes the control module to have a high power, which adds to the cost of the system and results in the system having to fulfill certain license requirements. Higher power devices must pass stringent design and manufacturing standards, users must be licensed periodically, and in some cases, must be tested for their legitimate use.

Such licenses are relatively expensive because the communication system interferes with other users every 1 square mile, and the larger the range (the higher the power), the greater the interference will be caused by the communication system. . Also, if the communication system wants to receive a wider range, the chances of being interfered by other users are greater. By doubling the range, the probability of interference will increase by eight times. It will also require unnecessarily high power and will not be adequately maintained by the battery, even when powered by the battery, and modules have a very short useful life or are very bulky (expensive) and needlessly This is a hassle to reduce the benefits of using a free standing RF module.

Another problem with such known communication devices is that it is relatively easy for an attacker to intercept a message sent by a control module to a particular communication module, and thus it is relatively easy to disable a particular module by replacing the replacement module instead of the original module. Do. This allows someone to penetrate the system, thus disabling certain modules and making them accessible to the system. For example, if a system is used as a building security device by disabling a particular module, access to the building can be made at that time. If the alternate station is able to send and receive signals as in the original station, the control module will detect that nothing is wrong.

Another problem in the known communication system is that the communication module receiving the data from the second communication module is required to send a message to the communication module as soon as it receives the data and to confirm that the data has been received. This reduces the inherent speed of the system.

According to a first aspect of the present invention there is provided a communication system comprising a control module, a plurality of communication modules that are separated from each other and away from the control module, wherein each module transmits data to another module in the system and the other module. It includes a narrow range of transceivers that can receive data from, and in use, the control module communicates directly with at least one communication module, not all, and communication between the control module and the remaining communication modules is between individual communication modules in the system. Characterized in that it is generated by continuous communication.

Therefore, in the system according to the first aspect of the present invention, the control module transmits data to the first communication module, and the first communication module acts on the data and then transmits the data to the second communication module. This procedure is repeated to receive a message from another communication module. Subsequent communication can be directed to a particular module. This ensures that each module responds in the same order each time, thus eliminating the possibility of multiple modules communicating at the same time. Doing so keeps the link complete.

The communication module is usually arranged in a cylindrical shape to form a loop and the data is transferred in either direction around the loop. Although each module receives data once in a complete cycle, an individual module may receive data more than once before all modules receive data messages. However, an individual module can only play its actual role in the loop if it receives a transmission that is correctly addressed to it.

An advantage of the device according to the first aspect of the invention is that the control module is not required to communicate directly with all communication modules, and the system can be installed so that the control module does not need to communicate directly with the communication module remote from the control module. Is there. This allows the control module to transmit only a short distance, for example, between the control module and the nearest communication module, even if the communication system can cover a wide range. Once the transmission module has received a message from the control module, the module can communicate directly with a neighboring communication module located relatively nearby. Such a module in the system may be arranged such that no module is required to transmit or receive at a distance longer than 30 m, for example, even though it may be extended over a wider distance as a whole. This allows for long distance transmissions using low power modules, resulting in a low power system that does not require a license. It also provides a wireless compact battery supply link.

The data received by the module is modified by the module before the sequence is sent to the next module, and the data sent to the next module controls the output of the next module. Thus, the data received by the module will be modified by the previous module that sent the data. This means that a particular communication module will rarely receive the same message, which reduces the chances of someone getting into the system, because it is virtually impossible to predict the order of data received by a particular communication module. The actual data transmitted also determines the output of the communication module receiving the message. This increases the disorder of messages sent and received in the system.

Preferably, the first module sending a message to the second module can detect when the second module sends a message to the third module. Once the second module detects that it has sent a signal, it knows that it sent a message that was sent to it. Thus, the module that sent the signal does not have to receive the probe signal again from the module that received the data to confirm that the message was received. This allows data to be transferred at high speed within the system.

Preferably each module is a transceiver operating in the radio frequency (RF) band, although ultrasonic, microwave or light waves may also be used.

The system may operate exclusively at a single frequency, but preferably may operate at any frequency within a certain frequency range and the operating frequency will change while the system is operating. By allowing the system to operate on any of a variety of frequencies within a certain range, the security of the system is further enhanced. Such frequency changes can be implemented using spread spectrum techniques. In such a system, the previous message received by the module will contain the data and tell which will be the next frequency for transmission. This will improve the technology currently used in spread spectrum technology.

Preferably, each module knows the system identification and its own address. This means that if the interferer tries to insert a replacement or additional module into the system, such replacement or addition will be detectable by the system. This will further enhance the complement of the system.

Preferably each module knows when to send and receive data within a given time slot and the module is blocked until the time it receives a signal. That is, it is very difficult to enter into a very small power consumption state and measure such a small amount of power consumed. This has the advantage of delivering very little power and allows the system to maintain long life even with small batteries. The only part of the system that does not change is the RF oscillator 21. This is what is used to make the whole system consistent and possible. The comparison is synchronized clocks. This allows unrelated modules to meet together at a fixed time. The oscillator is a system watch. Everything else is simply ready and on standby, but it conserves power by doing virtually nothing. At this point, he or she is prepared to receive the data. This reduces the power requirements of the system.

Just before sending the data, the module will switch to receive mode to check for the absence of a spatial wave. If there is a space wave, the module will not send a message. Thus, if an interferer attempts to intervene in the system, it will be detected for transmission by the module and the module will not transmit. Therefore, the control module will be warned that there is a problem and will activate the alarm.

Although the communication module performs different functions as the control module, it is actually the same as the control module, but the software for controlling the module is distinguished. In some cases, each communication module can be a control module if absolute communication is required. The software associated with a control module performs some research and passes the data it received and at the same time proves it.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

In FIG. 1 a system operating in the RF band according to the invention is designated by reference numeral 10. The system 10 includes a control module 11 and communication modules 12, 13, 14, 15. The control module 11 and the communication module 12-15 are actually identical but are controlled by different software shown in detail in FIG.

The control module 11 transmits data to a specific communication module such as, for example, the module 12. This module 12 then transmits the data to another communication module 13 until it is finally received by all modules 12-15. Therefore, the control module 11 does not directly communicate with each of the modules 11-15.

The module 11-15 is shown in more detail in FIG. 2 and is comprised of an RF oscillator 21, an RF chip 22, a memory 23 and a logic chip 24.

The operation of system 10 will now be described. When system 10 is first installed, it must be placed in install mode to install the system. This is achieved by starting with the control module and connecting each module with a power supply, for example a battery. Once this is done, the control module 11 will go through a boot-up routine and the control module 11 will achieve the following:

1. The communication module will teach the system's ID (dushashow) or loops to which they belong.

2. Each communication module will teach where it is in the loop.

3. Each communication module will teach its assigned area. If no modules are in the same area, they will receive the same data. An example of the received data is as follows:

Module Receive Send Message Read

12 None Hello 15 None

13 12 says Hello 15 I am 13.

12 says Hello 15 12 says Hello 15

14 I am 13.I am 14.

12 says Hello 15 12 says Hello 15 None

15 I am 14.I am 15.

12 says Hello 15 Hello 12 Hollo 15

This example shows how to read a message to be sent to (15) because (13) is in the same zone. This allows units in the same area to know about the actions of each other unit in their area.

4. Each communication module teaches how to generate the code required in the loop.

5. You will learn how many communication modules you have in the loop.

6. Know the message structure of the last communication module and know when it closes the loop.

7. If the correct message structure is received at the wrong time, the system will attempt to destroy the system.

8. A retry code will be present from each communication module, thus telling the installer whether the slot was missed on the first transmission attempt and the city will be unreliable.

Each module 11-15 includes a radio transmitter 30, a radio receiver 31, and a logic chip 24 for controlling data.

Logic chip 24 controls the module it is associated with and reduces power consumption when the module is in receive mode. Logic chips are software driven to improve their diversity. Software control may be taught in any module via system 10. This allows the system to be updated remotely, thus significantly reducing the cost of updating and improving the inherent flexibility of the system.

The RF chip 22 (receive mode) receives the data flowing from the aerial 32. It takes the form of a carrier wave with a change from the center frequency in one of several forms, such as modulation (e.g., frequency modulation (FM), amplitude modulation (AM), and other modulations). The RF chip 22 demodulates it. De-Modulates to remove the carrier frequency and then sends the actual data sent from the first location to the logic chip 24.

Conversely, it receives data from logic chip 24, then modulates it (combines it to the carrier frequency) and then sends the result to aerial 32 for conversion to radio waves.

The memory 23 allows memorizing the features of the module, which allows it to find and decipher the message as intended and ignore other messages not related to it.

Four communication modules 12, 13, 14 and 15 are connected by the system 10. Module 12 wants to talk to module 15 and modules 13 and 14 do not want to hear the conversation. However, modules 12 and 15 are too far apart for this purpose and are not possible with low size transmissions. Thus module 12 says Hello 15. Module 13 can see this message but cannot decrypt it because it is not (15) and says I am (13), (12) says Hello 15 and resends it. (14) knows which message to (13) should be picked up and is actually picked up. Even if the transmission is in that direction, the contents of the transmission are not addressed to it, so we know that (12) says Hello 15. We know that (13) is OK because we know that (13) also detects and passes it. So I am (14), the loop up to my location is intact, (12) says Hello 15. (15) receives it and the message is directed to (15), thus relaying the message (12) says Hello (15) to logic control. At the same time all sub-units are functioning correctly and the loop proves OK.

Module Receive Send Message Read

12 None Hello 15 None

13 12 says Hello 15 I am 13.

12 says Hello 15 None

14 I am 13.I am 14.

12 says Hello 15 12 says Hello 15 None

15 I am 14.I am 15.

12 says Hello 15 Hello 12 Hollo 15

The logic flow in the system will now be described in detail.

Control Module 11

1. Wake-up and Acquisition of Space Waves The control module can determine whether it is safe to transmit by recognizing space waves.

2. If transmission to 4 is obvious and does not repeat n times, then transmit when the apparent spatial wave and timing window coincide with each other. If this does not happen, go to (3).

3. Store the nth failure. If the failed attempt still takes place at (1) again when the next timing window occurs. If the number of failed transmissions is at the preset level, go to (7).

4. Send the code Packet.

5. Return to the receive mode. You hear the next unit continue to send to the loop. In this way, the module 11 can check whether the message has been correctly received.

6. If it appears to have gone to bed, wake up for the next full system poll and start at (1). If you do not see going to (1) until a certain number of attempts have been made, go to (7).

7. After triggering the information, go to (1).

Communication module 12-15

1. When a signal is transmitted by a logic chip 24 with an integral timer, a transmission is sent to wake up and notice the airwaves.

2. If clear goes to 4, another timing pulse will be received from the logic chip, allowing time continuous transmission to be detected.

3. If the number of attempted transmissions is below the free-cell level, go to (1). If the nth attempt is reached, the logic chip goes to (1) after registering the destruction of the loop.

4. Sample incoming data springs (messages) and investigate the capabilities of error detection and correction to decrypt them to verify that the message is valid. The message may contain instructions for such a module to act, simply to check that everything is OK in any case where the logic chip is to act on something, then adding (1) to its number (ie loops). I'll compile my own message to be sent to my next communication module, and end my own new error detection and correction code.

5. The logic chip 24 will then instruct the communication module to enter the transfer mode and send the data through the transmitter.

6. Once the message has been sent, the logic chip 24 will instruct it to switch to the receive mode and then hear the next unit sent to the next subordinate module in the system 10.

7. If it hears a message that can be determined by the next module (address code of the next module), the loop ends with the next step and will be closed. If you don't hear the right message, go to 5 until n attempts are made, and once this is reached it will send a system alert message instead of any other message you want it to send.

The data flow in the module is as follows.

1. An RF oscillator that acts as an onboard timer replaces the module in receive mode because it expects to receive a transmission from the previous module.

2. The receiver wakes up and samples the space waves so that they are free from other transmissions.

3. ⅰ. If the space wave is cleared, it waits for transmission.

Ii. If the spatial wave is busy, it will ignore such transmissions until it expects to try to re-try the transmission of the next unit.

Iii. 3ii will be scheduled a number of times until a valid transmission is received via clear air, otherwise it will be instructed to block by the associated logic and fail the attempt to receive the valid transmission.

4. Upon receipt of the transmission, the logic chip 24 will examine this to verify its validity as long as the receiving unit is involved.

5. Jar strings are used in this embodiment of the system, the role of which is to detect errors in the transmission.

6. ⅰ. Depending on the content of the incoming data and the results of the error checking spring, the logic chip decides to correct the error and will not fail the sequence. This is accomplished by another data spring following the error detection spring, all of which is done in the original message. These functions are known techniques and include simple binary math.

Ii. If the logic chip 24 determines that a detected error outside of a parameter programmed to accept falls, it will fail the sequence and continue from 3.ms.

7. ⅰ. If the received message is accepted, there will be an instruction embedded in the message instruction that the receiving module should act on, and if so it will do anything it should or remember what it should do, then modify the message and send it outside the loop. We will continue to add mathematically generated error detection and correction codes based on the content of the message we tried to send. You will send a new message next time.

Ii. If there is no action to be performed, it will simply re-address the message in the following unit order, and then send it back with the associated (corrected) error detection and correction strings.

8. After sending the message, it will wait for a certain time, and if the next sequence unit continues to send the message, it will know that the transmission has been successfully received. If not, it will resend the same message and wait again. A certain number of times will be repeated before the transfer fails and decides to fail such an attempt.

9. If you store a command that takes too long to run and fails to synchronize the system as a whole, it will be executed immediately, confirming that it has finished successfully, and saving this data for the next pass it will need.

10. If the previous attempt fails, it can generate universal system code. It is sent out the next time it wakes up, and this message follows any path to the control module, eliminating the need for subsequent units to end in the loop.

11. The message generated by (10) advises a transmission failure from the unit called My Number Plus 1 to the control module, and the next control unit can check this particular unit against the system survey in the event of such a failure. Then bypass the defective unit and investigate all subsequent units. Thus, in a security application, such a scenario would trigger an alarm condition.

12. Such a system may allow transmission through the loop to be performed in either direction. It can be used again in high security applications, requiring higher overall awareness in any reporting system.

Example message structure

Transmitter receiver

1. Wake up the next module. 1. Synchronize the clock.

2. I am at loop number ****. 2. Me too.

3. I want to talk to ****. 3. It is my number that I will hear.

4. This is your message. 4. I will work this.

5. Check the message. 5. The message was checked.

6. Order of Calibration 6. The order was checked.

7. Listen for the next module transmitting. 7. Change to transfer mode.

8. Block it. 8. Transfer the code to the next module.

In such an embodiment, when the receiver sends the message, the transmitter in the embodiment will be in a receiving state, and when the receiver sees that the message has been sent, the receiver hears and responds to the command.

The message structure can be made simple or complex to suit the application to which it is applied. Some of the messages can be used to check the operation of various modules, which can detect faults or conditions that will cause, for example, failure of low-power batteries, inform the user of the current problem and the specific module to which the data are related. (Identify).

R.F. Links have a higher degree of security than known links of this kind. The level of security is similar to that obtained from a wired link. It also uses minimal power to maintain the link and can be effectively used in large areas even at low power transfers.

The communication module 11-15 continues to operate as in the control module and changes it before sending the received message to the next module. System 10 is installed where a random string of data will be programmed into control module 11. This string of data determines the direction in which communication occurs between modules. The direction of the data flow can be changed before all modules receive the message. However, the system ensures that all modules are sent at least once in the specified transmission order.

The module to be transmitted is first switched to the receive mode for a short time to check if the spatial wave is clear and if no attempt is made to interrupt the system, no data is transmitted.

If no unit can transmit at the allotted time, it will receive the transmission anyway. If it finds a message that should have been sent, it is replaced by an attempt to destroy the system. Generates an alarm condition to be transmitted in the next available timeslot. If this is also covered, it will repeat the code periodically over and over until it is destroyed by another module. This limits the time that such an event will not be detected for a very short time. Some time shorter than 1 second is typical.

Claims (11)

A communication system consisting of a number of communication modules separated from one control module and separated from one control module, each module comprising a short range of transceivers capable of transmitting data to and transmitting data from one module to another in the system. And wherein, in use, the control module directly communicates with at least one, but not all, communication module, wherein communication between the control module and the rest of the communication module is generated by continuous communication between individual communication modules in the system. 2. A communication system as claimed in claim 1, wherein the communication module is arranged periodically to form a loop and the data can be transmitted in any direction around the loop. 3. A method according to claim 1 or 2, characterized in that the data received by the module is modified by the module before being sent to the next module in sequence, and the data sent to the next module controls the output of the next module. Communication system. The communication system according to any one of the preceding claims, wherein the first module sent to the second module can detect when the second module sends to the third module. The communication system according to any one of the preceding claims, wherein each module is a transceiver operating in a radio frequency band. The communication system according to any one of the preceding claims, characterized in that it can operate at any specified frequency in the frequency range (range) and the operating frequency is changed during operation of the system. The communication system according to any one of the preceding claims, wherein each module knows the identification of the system and knows its own address. The communication system according to any one of the preceding claims, wherein each module knows when to transmit and receive data within a given time slot and blocks the module until it is time to receive a signal. The communication system according to any one of the preceding claims, wherein immediately before transmitting the data, the module is switched to a receive mode to check that the airway is clear. Communication system according to any one of the preceding claims, characterized in that each communication module is actually identical to the control module, but distinguished by software controlling the communication module. The communication system according to any one of the preceding claims, wherein each communication module is a control module.