JP2015149598A - Security device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To suppress the traffic amount of flooding transmission, that can be transferred reliably at the time of large-scale disaster.SOLUTION: A security device mutually communicates with other security device via a wireless mesh network, by transmitting security information to a remote center device over a report network. When the report network is available, security information created by itself or received from other security device is transmitted to the center device. When the report network is unavailable, security information created by itself or received from other security device is flooding transmitted to other security device by a wireless mesh network communication unit.

Description

  The present invention relates to a security device that transmits security information indicating an abnormality in a monitored area to a remote monitoring center via a report line network, and more particularly to a wireless mesh network when the report line network cannot be used and is disconnected. It is related with the security apparatus which reports to a monitoring center through the other security apparatus connected by (3).

  When a conventional security device receives a detection signal such as an intrusion or a fire from a sensor, it is concentrated by the center device by reporting an abnormality to the center device of the monitoring center via a notification line network such as a telephone line or the Internet. The controller in charge of monitoring was able to grasp whether or not an abnormality had occurred. In such a conventional security device, the report line network to be used is used, for example, a telephone line network is used as a main line and a mobile phone line network is used as a sub line so that it is not easily affected by a communication failure in the report line network. In some cases, such duplication (multiplexing) is performed.

  In addition, when the disconnection of the reporting line network is detected, the security information (abnormality occurrence signal) is transmitted to the other security device installed in the neighboring house by the wireless transmitter and monitored via the reporting line network of the other security device. A security device that reports to the center has also been proposed (Patent Document 1).

JP-A-11-283160

  However, in the event of a large-scale disaster such as an earthquake, all of the multiplexed reporting network may be disconnected, and the neighboring reporting network may be disconnected as well. With this conventional technology, the controller could not grasp whether or not an abnormality occurred for each security device during a large-scale disaster.

  On the other hand, in recent years, an ad hoc wireless network (hereinafter referred to as a “wireless mesh network”) that can be configured flexibly by connecting wireless devices wirelessly like a network without relying on a fixed wired network. ) Is attracting attention. By connecting the security devices to each other via a wireless mesh network, security information can be transferred to a security device that does not have a communication failure at the time of a large-scale disaster. It becomes possible.

  By the way, in general, when information is transmitted to another communication node via a wireless mesh network, routing transmission with good transmission efficiency is used instead of flooding transmission in which information congestion is a concern. None of the conventional security devices transmit security information to other security devices by flooding transmission, and transmit it to the monitoring center via the security device. However, at the time of a large-scale disaster such as an earthquake, there is a possibility that the notification line network cannot be used even in the security device of the transmission destination (hereinafter referred to as “destination”) for routing transmission. If the reporting line network is not available even at the destination security device, it will be routed again to other security devices, but the reporting line network at the retransmitted destination security device may not always be available. Therefore, communication for searching for a security device that can use the report line network occurs in each security device, and the amount of traffic increases. Furthermore, in such a large-scale disaster, the communication status in the transfer path on the way changes from time to time, so the transmission and reception of control information for updating the routing table also increases. However, it is not an efficient communication method in terms of traffic volume. On the other hand, flooding transmission is generally a technology that spreads and transmits information to terminals in every corner of the network. Therefore, when each security device simultaneously performs flooding transmission in a large-scale disaster, the wireless mesh network becomes congested. There is a fear.

  Therefore, the present invention suppresses the traffic volume of the entire wireless mesh network by determining whether or not the security device that has received the flooded transmission information performs flooding transmission based on the availability of the notification line network. With the goal.

  In order to solve this problem, a security device that transmits security information to a remote center device via a notification line network, a center communication unit that communicates with the center device via the notification line network, and a wireless mesh A wireless mesh network communication unit that communicates with other security devices via a network, and the security information generated by itself or the security information received from other security devices when the reporting network is available, the center communication unit When the notification line network cannot be used, the center notification process transmitted to the center device by the wireless mesh network communication unit is used to transmit the security information generated by itself or the security information received from another security device. A security device, comprising: a notification unit that executes a transfer process for flooding the device.

  With this configuration, the security device of the present invention cannot use the report line network to which the security device is connected due to a large-scale disaster, and is further installed in an adjacent monitoring section (for example, a security target property such as a house). Even if the device is no longer able to use the notification line network, it will continue to send flooding transmissions to other security devices that can use the notification line network via the wireless mesh network. Since the security information can be transmitted to the center device, it is possible to provide a security system that is low-cost and strong against large-scale disasters. In particular, the security device of the present invention floods and transmits the security information to the wireless mesh network if the security information received via the wireless mesh network can be transmitted to the center device via its own reporting network. There is nothing. Accordingly, the guard information is not unnecessarily spread by flooding transmission, and the traffic volume of the entire wireless mesh network can be suppressed.

  Moreover, as a preferable aspect of the present invention, the information processing apparatus further includes a storage unit that stores communication state information indicating whether or not other adjacent security devices in the wireless mesh network can use the notification line network, The transfer processing in the unit adds information indicating prohibition of re-transfer of the security information when there is another adjacent security device that can use the notification line network with reference to the communication state information. And the notification unit does not execute the transfer process when the wireless mesh network communication unit receives the security information to which the information indicating the prohibition of retransmission is added. To do.

  With this configuration, even when a security device that cannot use the notification line network receives security information to which information indicating prohibition of retransmission is added (that is, security information that can be reported to the center device), Since information is not unnecessarily transmitted (re-transferred) via the wireless mesh network, diffusion of the security information can be suppressed, and the traffic volume of the entire wireless mesh network can be suppressed.

  Further, as a preferable aspect of the present invention, when security information is received by the wireless mesh network communication unit from another security device adjacent in the wireless mesh network, the notification line network of the other security device in the communication status information is set. It is further assumed that a communication state information update unit that updates that it cannot be used is provided.

  With this configuration, when security information is received from another neighboring security device in the wireless mesh network, it is determined that the other neighboring security device is in a state where the notification line network cannot be used, and the communication status information is updated. Since there is no need to generate unnecessary communication (for example, communication performed mutually to confirm the availability of the notification line network) to confirm the state of the latest report line network, Traffic volume can be reduced.

  Moreover, as a preferable aspect of the present invention, when the reporting unit transmits security information transmitted from an adjacent security device to the center device by the center reporting unit, it indicates that transmission to the center device is completed. The arrival confirmation information is transmitted by the wireless mesh network communication unit to another adjacent security device, and the communication state information update unit receives the arrival confirmation information from the other adjacent security device. It is assumed that the notification line network of another adjacent security device is updated to be usable.

  With this configuration, when arrival confirmation information is received from another adjacent security device, it is determined that the security device is in a state where the notification line network can be used, and the communication status information is updated. Therefore, there is no need to generate unnecessary communication (for example, communication periodically performed by all terminals for confirmation) for confirming whether or not the report line network can be used at the present time. Can be suppressed.

  Moreover, as a preferable aspect of the present invention, the communication status information update unit, in the transfer process, arrives corresponding to the security information within a predetermined period after transmitting the security information to which the information indicating the prohibition of retransfer is added. When the confirmation information is not received, the notification line network of all the other adjacent security devices in the communication state information is updated as unavailable.

  Even if it is stored in the communication status information that there are other adjacent security devices that can use the report line network, the report line network cannot be used depending on the progress of damage caused by a disaster. It can change. In this case, with the above configuration, the communication status information can be updated to the latest state (all unavailable) when the arrival confirmation information corresponding to the security information cannot be received, so unnecessary communication (for example, a notification line network) Communication for confirming whether or not the data can be used is not generated, and the traffic volume of the entire wireless mesh network can be suppressed.

  As described above, the security device of the present invention can perform flooding transmission capable of suppressing the traffic volume of the entire wireless mesh network, and efficiently and reliably transmits security information to the center device even during a large-scale disaster. be able to.

Schematic configuration diagram of the security system The figure explaining the operation | movement outline | summary which makes the feature of invention The figure explaining the operation | movement outline | summary which makes the feature of invention Block diagram of security equipment Flow chart showing specific processing procedure of abnormality report processing Flow chart showing specific processing procedure of transfer processing The flowchart which shows the specific process sequence of security information reception processing

  Hereinafter, with reference to the drawings, an embodiment of a security device in which a business center, a store, a house, or the like is used as a monitoring area, and a security guard of a monitoring center located in a place away from the monitoring area monitors whether there is an abnormality in the monitoring area. I will explain it.

  FIG. 1 is a schematic configuration diagram of a security system 1. As shown in FIG. 1, the security system 1 of the present invention includes at least one center device 3 installed in a monitoring center, a security device 2 installed in a monitoring area, a notification line network 4, and a wireless mesh network 5. And is roughly composed of

  The center device 3 is installed in a monitoring center that is a facility operated by a security company or the like, and is composed of one or a plurality of computers. In the monitoring center, the controller constantly monitors the monitoring area, and based on the security information received by the center apparatus 3 from the security device 2, grasps the information of the monitoring area to be dealt with and confirms or monitors the user. Necessary measures are taken, such as instructions for guards to deal with the area. Here, the security information is information collected and generated in order to perform abnormality monitoring in the monitoring area, such as the operating state of the equipment of the security device 2 and the presence or absence of abnormality in the monitoring area.

  The security device 2 is an example of a security controller, is connected to a sensor installed in the monitoring area, and monitors an abnormality in the monitoring area based on the detection result of the sensor. Further, the security device 2 is connected to the center device 3 via a notification line network 4 such as the Internet, a telephone line network, and a public wireless network, and reports the detected abnormality to the center device 3 as security information. Furthermore, the security device 2 is interconnected with other security devices 2 that monitor other monitoring areas by the wireless mesh network 5 and is self-existing due to radio interference, disconnection of a line cable, communication failure in a communication base station or provider, etc. When the report line network 4 to which is connected cannot be used, the security information is flooded and transmitted to the other security devices 2 that can use the report line network 4 via the wireless mesh network 5. Here, the flooding transmission is different from the routing transmission for specifying the adjacent communication node to be transmitted next in accordance with the routing table, and unconditionally transmits information to adjacent communication nodes, and between the plurality of communication nodes. This is a communication method in which information is repeatedly transmitted and received one after another so that information is transmitted to a communication node that is a final transmission destination. As an example, simple flooding has been proposed in which, after each communication node receives data, it is confirmed that the received data is duplicated, and if not duplicated, broadcast is repeated. Then, the other security device 2 that has received the security information flooded via the wireless mesh network 5 transmits the security information received via its own reporting network 4 to the center device 3. Therefore, the security device 2 of the present invention guards the center device 3 from the notification line network 4 of another security device 2 transmitted via the wireless mesh network 5 even when the notification line network 4 cannot be used. Since information can be transmitted, it has characteristics that it is low-cost and resistant to communication failure, and can be transmitted reliably and efficiently even during a large-scale disaster by flooding transmission (first characteristic).

  In particular, the security device 2 of the present invention floods and transmits the security information generated by itself or the security information transmitted from another security device 2 via the wireless mesh network 5 only when its own reporting network 4 cannot be used. The flooding transmission is not performed when the own reporting line network 4 is available. Therefore, since the security information transmitted to the center device 3 through the own reporting line network 4 is not flooded and transmitted, unnecessary spreading of the security information in the wireless mesh network 5 can be suppressed, and the traffic volume of the entire wireless mesh network is suppressed. (Second feature). Here, the outline of the operation according to the second feature will be described in detail with reference to FIG.

  In FIG. 2, the circles indicated by reference numerals 2a to 2k are the security devices 2 installed in different monitoring areas, and the security devices 2a to 2d and 2g to 2k represented by the black circle use the notification line network 4. The security devices 2e and 2f represented by white circles are not capable of using the notification line network 4. Moreover, in the same figure, the dotted line which connected between each guard apparatus 2 represents the guard apparatus 2 which has the relationship which adjoins in the wireless mesh network 5. FIG. The security device 2 in the adjacent relationship is the security device 2 in a relationship in which communication can be performed directly when information is broadcast to the wireless mesh network 5, which is, in other words, a relationship in which radio waves reach effectively. It is a security device 2. Here, when it is detected that an abnormality has occurred in the monitoring area to be monitored by the security device 2a, first, the security device 2a tries to transmit the security information to the center device 3 via the report line network 4. However, when the report line network 4 to which the security device 2a is connected cannot be used, the security information is transmitted to another adjacent security device 2b via the wireless mesh network 5. Since the reporting line network 4 cannot be used also in the security device 2b, the security information is transmitted to the other adjacent security devices 2c, 2d, and 2e. Similarly, since the alerting line network 4 cannot be used in the security devices 2c and 2d, the security information is transmitted to the other security devices 2e and 2f adjacent to them. In this way, the security information flooded from each security device 2a is transmitted to the security devices 2e and 2f that can use the notification network 4. Then, the security devices 2 e and 2 f transmit the security information to the center device 3 via the report line network 4 and do not perform flooding transmission via the wireless mesh network 5. Therefore, since the security information is not transmitted to the security devices 2g to 2k positioned first from the security devices 2e and 2f, it is possible to suppress the traffic volume of the entire wireless mesh network.

  Furthermore, the security device 2 of the present invention transmits from the security information generated by itself or another security device 2 when it is known that any of the other security devices 2 adjacent to it can use the notification line network 4. Information indicating that the re-transfer of the security information is prohibited (hereinafter referred to as “re-transfer prohibition flag”) is added to the security information that has been sent and flooded. The security device 2 that has received the highly probable security information that has already been reported to the center device (security information with the addition of a re-transfer prohibition flag) is not available in its own reporting network 4. Even if it exists, the security information is discarded without being transmitted (re-transferred). Therefore, it is possible to suppress the spread of security information that is already reported to the center device, and to suppress the traffic volume of the entire wireless mesh network (third feature). Here, the outline of the operation according to the third feature will be described in detail with reference to FIG.

  FIG. 3 shows a case where the notification line network 4 can be used only by the security device 2f, unlike FIG. In FIG. 3, the tables denoted by reference numerals 282a, 282d, and 282e are communication status information 282 that indicates whether or not the notification line network 4 of the other adjacent security devices 2 stored in the security devices 2a, 2d, and 2e is available. It is an example. In the present embodiment, the communication status information 282 includes terminal IDs of other adjacent security devices 2 (hereinafter referred to as “adjacent IDs”) and information indicating whether or not the report line network 4 to which the security devices 2 are connected can be used. Is associated with the table information. Here, when it is detected that an abnormality has occurred in the monitoring area to be monitored by the security device 2a, first, the security device 2a tries to transmit the security information to the center device 3 via the report line network 4. However, when the report line network 4 to which the security device 2a is connected cannot be used, the security information is transmitted to another adjacent security device 2b via the wireless mesh network 5. At this time, the security device 2a refers to the communication status information 282a to determine that there is no adjacent security device 2 that can use the notification line network 4, and therefore sets a retransmission prohibition flag for the security information to be transmitted. There is no addition. Similarly, in the security devices 2b and 2c, the security information is transmitted without adding the re-transfer prohibition flag because there is no report line network 4 available in the other security devices 2 adjacent thereto. On the other hand, in the security devices 2d and 2e, it can be determined by the communication status information 282d and 282e that the adjacent security device 2d can use the notification line network 4, and thus the security information with the re-transmission prohibition flag added is transmitted. In FIG. 3, the flow of security information to which a re-transfer prohibition flag is added is indicated by a dotted line arrow. In this way, the security information flooded from each security device 2a is transmitted to the security device 2f that can use the notification line network 4, and the center device 3 is protected via the notification line network 4 of the security device 2f. Information is sent. On the other hand, the security device 2g that has received the security information to which the re-transfer prohibition flag is added does not transmit the security information via the wireless mesh network 5 even if the reporting line network 4 cannot be used. . Accordingly, since the security information is not transmitted from the security device 2g to the previous security devices 2h to 2k, the traffic volume of the entire wireless mesh network can be suppressed.

  FIG. 4 is a schematic configuration diagram of the security device 2. The security device 2 includes a center communication unit 21, a sensor I / F 22, an operation unit 23, a notification unit 24, a wireless mesh network communication unit 25, a storage unit 28, and a control unit 29.

  The center communication unit 21 is a communication interface connected to the report line network 4, and performs communication of security information with the center apparatus 3 via the report line network 4.

  The sensor I / F 22 is a communication interface that is connected to various sensors arranged at appropriate locations in the monitoring area and receives detection signals from the various sensors. A sensor will output a detection signal with respect to sensor I / F22, if the event made into a detection target is detected from the state change of a monitoring division. Various sensors include security sensors such as magnet sensors that detect the opening of windows and doors, infrared sensors that detect human bodies with infrared rays, disaster prevention sensors such as smoke detectors and heat detectors, and emergency buttons operated by users. Etc. A sensor ID, which is unique identification information, is assigned to each sensor, and this sensor ID is included in the detection signal transmitted and received between the sensor I / F 22 and the sensor 20.

  The operation unit 23 is a switch for the user to set the start or end of security (monitoring) for the security device 2, for example. In addition, the operation unit 23 may include, for example, a button for confirming the state of each sensor installed in the monitoring area. When these switches or buttons are selected by the user, the operation unit 23 inputs a corresponding signal to the control unit 29.

The alerting | reporting part 24 is comprised by a liquid crystal display, a speaker, etc., for example, and outputs the information of the security apparatus 2 to a user with a character or an audio | voice. For example, when the operation unit 23 is operated and the start of security (monitoring) is instructed, the notification unit 24 provides information related to the start of security (for example, a message to start security after 30 seconds) to the user. To inform. In addition, when the operation unit 23 is operated to instruct the state confirmation of each sensor, the notification unit 24 notifies the user of the state of each sensor. Note that the notification unit 24 may be integrated with the operation unit 23 by, for example, a liquid crystal touch panel display.

  The wireless mesh network communication unit 25 is a communication interface that is wirelessly connected to the wireless mesh network 5, and communicates security information and the like with other security devices 2 via the wireless mesh network 5. Note that the wireless mesh network 5 may employ any short-range wireless communication such as a wireless communication standard such as a so-called wireless LAN or Bluetooth (registered trademark) conforming to any of the IEEE 802.11 standards.

  The storage unit 28 includes a ROM, a RAM, or an HDD, and stores various data and various programs for operating the security device 2. The various data includes sensor information 281, communication status information 282, transmitted information ID list 283, and other various information used for processing by the control unit 29 (for example, terminal ID of the security device 2, information ID described later, various Threshold).

  The sensor information 281 is table information in which a sensor ID, a sensor type, a sensor installation location, a sensor state, and the like are associated with each sensor registered in the security device 2. There are three types of sensors, for example, security sensors, disaster prevention sensors, and emergency buttons. The sensor state includes, for example, a “non-sensing state” and a “sensing state”. For example, for a security sensor, the non-sensing state and the sensing state correspond to a state in which a door or the like is opened or a presence of a person is not sensed and a sensed state, respectively. Regarding the disaster prevention sensor, the non-sensing state and the sensing state correspond to a state where smoke or heat is not sensed and a state where it is sensed, respectively. For the emergency button, the non-sensing state and the sensing state correspond to a state where the button is not pressed and a state where the button is pressed, respectively.

  As described above, the communication status information 282 is information indicating whether or not the terminal ID (hereinafter referred to as “adjacent ID”) of another adjacent security device 2 and the availability of the notification line network 4 to which the security device 2 is connected. Is table information in which The communication status information 282 is set so that the reporting line network 4 of all the adjacent security devices 2 can be used when the security device 2 is activated, and is moved by the communication status information update unit 293 of the control unit 29 described later. Updated.

  The transmitted information ID list 283 is a list of security information transmitted in the past by the center communication unit 21 or the wireless mesh network communication unit 25 so that the security device 2 does not repeatedly transmit the same security information to the wireless mesh network 5. This is list information in which an identification number (hereinafter referred to as “information ID”) is described. For example, when the security device 2 transmits security information, the information ID of the security information is added to the transmitted information ID list 283 and stored. When the security device 2 receives the security information via the wireless mesh network 5, if the information ID of the security information is recorded in the transmitted information ID list 283, the security device 2 does not transmit the security information. Discard it. In addition, information ID is a number which can identify security information, Comprising: In this embodiment, it is information which consists of the combination of the terminal ID of the security apparatus 2 which produced | generated security information, and the serial number incremented for every production | generation of security information. is there.

  The control unit 29 includes a microcomputer including a CPU and its peripheral circuits, and controls the above-described units to operate the security device 2. The control unit 29 includes an abnormality determination unit 291, a notification unit 292, and a communication state information update unit 293 as functional modules realized by the microcomputer and the computer program executed on the microcomputer.

  When the abnormality determination unit 291 receives a sensing signal from the sensor, the abnormality determination unit 291 refers to the sensor information 281 and identifies the type of sensor associated with the sensor ID included in the received sensing signal. And the abnormality determination part 291 is a detection signal from any one of a security sensor, a disaster prevention sensor, or an emergency button, when the security apparatus 2 has started guarding (monitoring) based on operation by the operation part 23 from a user. Is received, it is determined to be abnormal. On the other hand, when the security device 2 has not started security (monitoring) and receives a detection signal from the security sensor, the abnormality determination unit 291 determines that there is no abnormality (that is, ignores the detection signal). Moreover, even when the security device 2 has not started security (monitoring), the abnormality determination unit 291 determines that it is abnormal when receiving a sensing signal from the disaster prevention sensor or the emergency button. In addition to the above, the abnormality determination unit 291 may determine that there is an abnormality when a device abnormality of the security device 2 itself is detected.

  When the abnormality determination unit 291 determines that the abnormality determination unit 291 is abnormal, the notification unit 292 performs abnormality notification processing in which the center communication unit 21 or the wireless mesh network communication unit 25 transmits security information to the center device 3. The security information includes, for example, the terminal ID and information ID of the security device 2 stored in the storage unit 28, the sensor ID of the sensor that senses the abnormality, and the type and location of the sensor identified from the sensor information 281. Contains information. In addition, when the reporting unit 292 receives security information from another security device 2 by the wireless mesh network communication unit 25, the reporting unit 292 transmits the security information to the center device 3 by the center communication unit 21 or the wireless mesh network communication unit 25. Performs information reception processing. Hereinafter, an example of the flow of the abnormality reporting process and the security information receiving process executed by the reporting unit 292 will be described in detail with reference to the flowcharts of FIGS.

  FIG. 5 is a flowchart for explaining abnormality notification processing in the present embodiment. When the abnormality determination unit 291 determines that the notification unit 292 is abnormal, the notification unit 292 starts the abnormality notification process. In the abnormality notification process, first, it is determined whether or not the notification line network 4 to which the security device 2 is connected is available (ST11). In the present embodiment, the method for determining whether or not the notification line network 4 is available is determined based on whether or not a TCP connection with the center apparatus 3 can be established. However, the present invention is not limited to this, and it may be determined that the notification line network 4 cannot be used by receiving an error message from the relay device in the communication path, or the disconnection is physically detected by checking the voltage of the communication line. It may be determined that the report line network 4 cannot be used, or it may be determined that the report line network 4 cannot be used when the response confirmation information cannot be received from the center device 3 after transmitting the security information.

  When it is determined in ST11 that the reporting line network 4 to which it is connected is available (ST11-Yes), a center reporting process for transmitting security information to the center device 3 via the reporting line network 4 is executed. (ST12). On the other hand, when it is determined in ST11 that the reporting network 4 to which it is connected cannot be used (ST11-No), the reporting unit 292 executes a transfer process for transmitting security information in the wireless mesh network 5. (ST13). Details of the transfer process will be described later.

  When the center notification process is executed in ST12 or the transfer process is executed in ST13, the notification unit 292 uses the information ID of the security information generated by the control unit 29 as the transmitted information ID of the storage unit 28. The process of adding to the list 283 is executed (ST14), and the abnormality notification process is terminated.

  FIG. 6 is a flowchart for explaining transfer processing in the present embodiment. The reporting unit 292 starts a transfer process for transmitting (transferring) the guard information via the wireless mesh network 5 when the report line network 4 cannot be used in the abnormality report process and the guard information receiving process. In the transfer process, first, the communication status information 282 is referred to and it is determined whether or not there is an available other one of the adjacent security devices 2 using the report line network 4 (ST21). In ST21, when there is an adjacent security device 2 that can use the reporting line network 4 (ST21-Yes), the security information generated by itself (or the security information received from another security device 2) A transfer prohibition flag is added and set to ON (that is, “1”) (ST22).

  Thereafter, the timer (reach confirmation timer) corresponding to the information ID of the security information starts counting. Here, the arrival confirmation timer is security information in which the re-transmission prohibition flag is set to ON, and the security information flooded via the wireless mesh network 5 is transmitted from the adjacent security device 2 to the center device 3. This is a timer for confirming that security information has been properly transmitted. That is, after transmission of security information with the re-transfer prohibition flag set to ON, arrival confirmation information described later can be received within a predetermined period counted by the arrival confirmation timer (for example, within 30 seconds set as a threshold in advance) This is used as a timer for determining that the security information has been transmitted to the center device 3.

  When there is no adjacent security device 2 that can use the notification line network 4 in ST21 (ST21-No) or when an arrival confirmation timer is started in ST23, security information is transmitted via the wireless mesh network 5. Flooding is transmitted (ST24), and the transfer process is terminated.

  FIG. 7 is a flowchart illustrating security information reception processing in the present embodiment. The reporting unit 292 starts the security information reception process when the wireless mesh network communication unit 25 receives the security information. In the security information reception process, first, a process for updating the communication status information 282 is executed with respect to a communication status information update unit 293 described later (ST31). At this time, the communication status information update unit 293 determines that the adjacent security device 2 that is the direct transmission source of the security information received by the wireless mesh network communication unit 25 is in a state where the report line network 4 cannot be used. The status information 282 is processed so as to update the information indicating whether or not the report line network 4 corresponding to the terminal ID (adjacent ID) of the security device 2 is updated to “impossible”.

  Next, whether or not the security information received by the wireless mesh network communication unit 25 is stored in the transmitted information ID list 283 of the storage unit 28 is determined as being previously transmitted security information. (ST32). When it is determined in ST32 that the received security information is the security information transmitted in the past (ST32-Yes), the security information is discarded and the security information reception process is terminated. On the other hand, when it is determined in ST32 that the received security information is the security information that has not been transmitted in the past (ST32-No), it is determined whether or not the report line network 4 to which the terminal itself is connected is available. Determine (ST33).

  When it is determined in ST33 that the reporting line network 4 to which it is connected is available (ST33-Yes), the center that transmits the received security information to the center device 3 via the own reporting line network 4 The notification process is executed (ST34). When the transmission of the security information to the center device 3 is completed in the center report processing of ST34, the arrival confirmation information indicating that the transmission of the security information is completed (successful) is sent to other adjacent information via the wireless mesh network 5. It transmits with respect to the security apparatus 2 (ST35). In the present embodiment, it is assumed that the arrival confirmation information transmitted at this time is transmitted by broadcast transmitted only to other adjacent security devices 2 (that is, limited to only one hop). In addition, the arrival confirmation information includes the terminal ID of the security device 2 that has transmitted the security information to the center device 3 via the report line network 4 and the information ID of the security information. It is possible to identify which security information has been transmitted to the center device 3.

  When it is determined in ST33 that the reporting line network 4 to which it is connected is not available (ST33-No), the retransmission prohibition flag is set to ON (ie, “1”) for the received security information. It is determined whether or not it is performed (ST36). When it is determined in ST36 that the re-transfer prohibition flag is set to ON for the received security information (ST36-Yes), the security information is discarded and the security information reception process is terminated. On the other hand, when it is determined in ST36 that the retransfer prohibition flag is not set to ON for the received security information (ST36-No), the transfer process described above is executed (ST37).

  When the transfer process is completed in ST37 or when the transmission of the arrival confirmation information is completed in ST35, the information ID written in the received security information is stored in the transmitted information ID list 283 of the storage unit 28. Is executed (ST38), and the security information receiving process is terminated.

  The communication state information update unit 293 performs processing for updating the communication state information 282 based on the guard information, the arrival confirmation information, and the arrival confirmation timer value received via the wireless mesh network 5. Specifically, when the communication status information update unit 293 receives security information from other security devices adjacent via the wireless mesh network 5 in ST31 in the security information reception process described above, the communication status information update unit 293 The reporting line network 4 of the security device 2 is updated as unavailable. Thus, when security information is received from another neighboring security device in the wireless mesh network 5, it is determined that the other neighboring security device cannot use the notification line network, and the communication status information is updated. Therefore, it is not necessary to generate useless communication (for example, communication performed mutually for confirming whether or not the reporting line network 4 of the adjacent security device 2 can be used), so that the traffic volume of the entire wireless mesh network 5 is suppressed. be able to.

  In addition, when the communication status information update unit 293 receives arrival confirmation information from another adjacent security device via the wireless mesh network 5, the communication status information update unit 293 can use the notification line network 4 of the security device 2 in the communication status information 282. Perform the update process. That is, since only the security device 2 that can use the notification line network 4 transmits the arrival confirmation information, the security device 2 determines that the notification line network 4 is available and transmits the arrival confirmation information. The communication status information of the adjacent security device 2 is updated. Therefore, there is no need to generate unnecessary communication (for example, communication periodically performed by all terminals for confirmation) for confirming whether or not the reporting network 4 can be used at the present time, and the traffic volume of the entire wireless mesh network Can be suppressed. At this time, the notification unit 292 has received the arrival confirmation information for the security information transmitted after setting the retransmission prohibition flag to ON (ST22) in the transfer process described above. In this case, the arrival confirmation timer started in ST23 is canceled (reset).

  In addition, when the arrival confirmation timer started in ST23 in the transfer process exceeds a predetermined threshold, the communication status information update unit 293 responds to the security information transmitted within a predetermined time as a threshold. When the arrival confirmation information to be received cannot be received, a process of updating all the adjacent security devices 2 in the communication state information 282 as being unavailable is performed. Thereby, there is no need to generate unnecessary communication (for example, communication performed mutually for confirming the availability of the notification line network 4 of the adjacent security device 2) in order to update the communication state information 282. The traffic volume of the entire mesh network can be suppressed. At this time, the reporting unit 292 retransmits the security information having the same content in which the retransfer prohibition flag is set to OFF (that is, “0”).

  By the way, the present invention is not limited to the above-described embodiment, and may be implemented in various different embodiments within the scope of the technical idea described in the claims. Further, the effects described in the embodiments are not limited to this.

  In the above-described embodiment, the communication state information 282 is dynamically updated by the communication state information update unit 293 of the control unit 29. However, the present invention is not limited to this, and is input / set by an administrator or a user. May be stored in the storage unit 28.

DESCRIPTION OF SYMBOLS 1 ... Security system 2 ... Security apparatus 3 ... Center apparatus 4 ... Report line network 5 ... Wireless mesh network 21 ... Center communication part 22 ... Sensor I / F
DESCRIPTION OF SYMBOLS 23 ... Operation part 24 ... Notification part 25 ... Wireless mesh network communication part 28 ... Memory | storage part 29 ... Control part 281 ... Sensor information 282 ... Communication status information 283 ... Sent information ID list 291... Abnormality determination unit 292... Notification unit 293.

Claims (5)

A security device that transmits security information to a remote center device via a reporting network,
A center communication unit that communicates with the center device via the notification line network;
A wireless mesh network communication unit that communicates with other security devices via a wireless mesh network;
When the notification line network is available, the security information generated by itself or the security information received from another security device is transmitted to the center device by the center communication unit, and the notification line network is used. When it is not possible, a reporting unit that performs a forwarding process of flooding and transmitting the security information generated by itself or the security information received from another security device to the other security device by the wireless mesh network communication unit;
A security device characterized by comprising: A storage unit storing communication state information indicating whether or not other adjacent security devices in the wireless mesh network can use the notification line network;
The transfer process in the reporting unit refers to the communication status information, and information indicating prohibition of re-transfer of the security information when there is another adjacent security device that can use the reporting network To send flooding,
2. The security device according to claim 1, wherein the notification unit does not execute the transfer process when the wireless mesh network communication unit receives the security information to which information indicating prohibition of the re-transfer is added.   Communication state information update that updates the notification line network of the other security device in the communication status information as unavailable when security information is received by the wireless mesh network communication unit from another security device adjacent in the wireless mesh network The security device according to claim 2, further comprising a unit. When the reporting unit transmits the security information transmitted from an adjacent security device to the center device by the center reporting unit, the wireless mesh network communication indicates arrival confirmation information indicating that transmission to the center device is completed. Sent to other security devices adjacent by
The communication state information update unit updates the notification line network of the other adjacent security device in the communication status information to be usable when the arrival confirmation information is received from another adjacent security device. The security device according to claim 3. When the communication status information update unit does not receive arrival confirmation information corresponding to the security information within a predetermined period after transmitting the security information to which the information indicating the prohibition of retransmission is added in the transfer process, The security device according to claim 4, wherein the notification line network of all other adjacent security devices in the communication status information is updated to be unusable.

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