JP2008269252A - Security system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a security system for detecting that communication is abnormal by a security terminal when a network at a WAN side is put in a disconnected state due to the abnormality of communication equipment, and for automatically restoring connection to the WAN side network by restarting the communication equipment, and for reducing a dealing time until the network is restored or the burden of a user such as operation costs. <P>SOLUTION: This security terminal is provided with a WAN side monitoring means for monitoring the presence/absence of the abnormality of communication due to a global IP address and a contact output means for a power source for outputting a contact signal to a relay. When the abnormality of communication is detected by the WAN side monitoring means, the contact signal of the disconnection of connection is output to a relay by a contact output means for a power source, and the contact signal of connection is output after the lapse of a predetermined time, and communication equipment is restarted by turning on/off a power source. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a security system that transmits the security status of a security target facility via an electric communication line such as the Internet.

  Conventionally, a security system for detecting abnormalities on the security target facilities such as general homes, stores, factories, etc., and reporting information on abnormalities to the reporting destinations such as center devices and various terminal devices via the security terminals. Is used. In this conventional security system, there is a problem that the security terminal and the communication terminal cannot communicate with each other when an abnormality occurs in a communication device such as a router or a modem. In particular, when communication is not possible due to an abnormality in the communication device at the security terminal installation location, it is necessary to dispatch personnel to the security terminal installation site and take measures such as restarting the communication device. In the situation where it is desired to restore the system, the handling time and personnel costs are also required.

As a method for solving such a problem, for example, there is a method disclosed in Patent Document 1. In the monitoring apparatus of Patent Document 1, the communication state is monitored by sending a PING to a private IP address of a network component including a router in the LAN. A device capable of restarting a communication device when the monitoring apparatus detects a communication abnormality has been put into practical use.
JP 2002-111665 A

  However, in the case of a security terminal, it is not possible to detect disconnection of communication with a communication terminal on the WAN side only by detecting disconnection of the network in the LAN. In addition, in order to detect a disconnection on the WAN side, not a network disconnection within the LAN, it is necessary to perform confirmation using a global IP address. However, installation of a dedicated server having a fixed global IP address incurs operating costs. End up.

  The present invention has been made in view of such circumstances. When a WAN-side network is disconnected due to an abnormality in the communication device, the security terminal detects that the communication is abnormal, and the communication device is restarted. It is an object of the present invention to provide a security system that can start up and automatically restore the connection to the network on the WAN side, and reduce the burden on the user such as the handling time until the network restoration and operation costs.

  The security system according to claim 1 is provided between a communication device that communicates with a communication terminal outside a security target facility using a global IP address, a power supply device that supplies power to the communication device, and the communication device and the power supply device. A WAN-side monitoring means for providing a relay for turning on / off power to a communication device and a security terminal for monitoring a security target facility, wherein the security terminal monitors whether there is a communication abnormality with a global IP address; Power contact output means for outputting a contact signal to the power supply, and when the WAN monitoring means detects a communication abnormality, the power contact output means outputs a contact disconnection contact signal to the relay, and after a predetermined time has elapsed. , Outputting a contact signal of connection, and restarting the communication device when the power is turned on and off.

  In the security system according to claim 2, the security terminal includes a global IP address acquisition unit by accessing a UPnP-compatible router, and the WAN side monitoring unit monitors a communication abnormality depending on whether or not the global IP address can be acquired. Features.

  In the security system according to claim 3, the security terminal includes a global IP address acquisition unit by accessing the global IP address acquisition server, and the WAN-side monitoring unit monitors a communication abnormality depending on whether the global IP address can be acquired. It is characterized by that.

  According to the first aspect of the invention, when the WAN monitoring means detects a communication abnormality, the contact output means for power supply outputs the contact signal for disconnection to the relay, and outputs the contact signal for connection after a predetermined time elapses. Since the communication device is restarted when the power is turned on and off, the security terminal detects the communication error and restarts the communication device when the WAN network is disconnected due to a communication device error. To automatically restore the connection to the network on the WAN side, leading to reduction of the burden on the user such as the time required for network restoration and the operation cost.

  According to the invention of claim 2, the security terminal is provided with a global IP address acquisition means by accessing a UPnP compatible router which is a communication device, and the WAN side monitoring means detects a communication abnormality depending on whether or not the global IP address can be acquired. Since the monitoring terminal detects that the global IP address of the router has failed, the security terminal detects a communication error, restarts the communication device, and automatically restores the connection to the WAN side network. This leads to reduction of the burden on the user such as the time required for recovery and operation costs.

  According to the invention of claim 3, the security terminal is provided with a global IP address acquisition unit by accessing the global IP address acquisition server, and the WAN side monitoring unit monitors communication abnormality depending on whether or not the global IP address can be acquired. Therefore, even if the global IP address acquisition failure is the cause, the security terminal detects that there is a communication error, restarts the communication device, and automatically restores the connection to the WAN side network. This leads to reduction of user burden such as time and operation cost.

  Hereinafter, embodiments of the present invention will be specifically described with reference to the drawings. FIG. 1 is a configuration diagram showing an example of a security system according to the present invention. FIG. 2 is a timing chart showing an operation by PING transmission / reception of the security system.

  The security system 1 in FIG. 1 transmits the security status of a security target facility such as a general home, store, or factory to a communication terminal via an IP communication network 5 that is an electric communication line or the Internet. The security system 1 includes a communication device 3 that communicates with the IP communication network 5, a power supply device 20 that supplies power to the communication device 3, a security terminal 10 that monitors a security target facility, and the like.

  The IP communication network 5 is an electric communication line for communication between a communication terminal outside the security target facility and the security terminal 10, and is an optical line, an analog subscription line, an ISDN line, a DoPa line, a mobile phone network, a PHS network, or the like. . Note that the IP communication network 5 may be used not only for connection via the Internet but also for data communication in which communication is performed by dialing Point to Point. The communication device 3 connected to the IP communication network 5 is a device such as a router or a terminal adapter, and has a function of connecting to the WAN (Wide Area Network) side via the IP communication network 5. . More specifically, it is an IGD (Internet Gateway Device) such as a UPnP router.

  The security terminal 10 includes a processing unit 12 that performs input processing of information such as sensors (not shown) and performs various processes related to communication, and a PING transmission / reception unit 13 that transmits / receives PING to / from the WAN side and the LAN side via the communication device 3 The address management unit 14 manages a private IP address and a global IP address, and the contact output unit 15 outputs a contact output to a relay described later.

  A power supply device 20 that supplies power to the communication device 3 is provided, and a relay 22 is provided between the communication device 3 and the power supply device 20. The contact of the relay 22 is provided between the communication device 3 and the power supply device 20 so that the power supply to the communication device 3 can be turned on and off. The contact of the relay 22 is controlled by a contact output signal of the contact output unit 15 of the security terminal 10.

  Operation | movement of the security system 1 comprised as mentioned above is demonstrated. First, in order to check whether there is an abnormality in communication on the LAN side, as shown in FIG. 2, the PING transmission / reception unit 13 of the security terminal 10 transmits a PING to the communication device 3 using the private IP address. The communication device 3 that has received the PING sends a response to the PING transmission / reception unit 13 of the security terminal 10. When the PING transmission / reception unit 13 receives this response, it is determined that the communication device 3 is operating normally with respect to communication on the LAN side.

  However, if the communication device 3 does not operate normally due to freeze or the like, and there is no response even if a PING is transmitted from the security terminal 10 to the communication device 3 multiple times using the private IP address, the security terminal 10 It is determined that an abnormality has occurred in the device 3. And if the abnormality of the communication apparatus 3 is detected, the security terminal 10 will output the contact disconnection signal of the contact of the relay 22 from the contact output part 15 as a restart signal. Thereby, the contact of the relay 22 is opened, the power supply from the power supply device 20 to the communication device 3 is cut off, and the communication device 3 completely stops its operation. Next, after a predetermined time has elapsed, the contact output unit 15 of the security terminal 10 outputs a contact signal for connection of the relay 22. As a result, power is again supplied to the communication device 3, and the communication device 3 is restarted. The interval at which the contact output unit 15 outputs the contact signal for disconnection and the contact signal for connection is a time sufficient for the communication device 3 to restart.

  In addition, in order to check whether there is any abnormality in communication with the WAN side means (in FIG. 2, ISP (Internet Services Provider) 7), PING can be used as in the LAN side. There is a case. For example, when the address management unit 14 of the security terminal 10 knows in advance the global IP address of the ISP 7 and the communication device 3 can access the ISP using its own global IP address, as shown in FIG. The PING transmission / reception unit 13 of the security terminal 10 transmits the PING to the ISP 7 using the global IP address. This PING is sent to the ISP 7 via the communication device 3 and the IP communication network 5. The ISP 7 that has received the PING sends a response to the PING transmission / reception unit 13 of the security terminal 10 via the IP communication network 5 and the communication device 3. When the PING transmission / reception unit 13 receives this response, it is determined that the communication device 3 is operating normally for WAN-side communication.

  However, if the communication device 3 does not operate normally due to freeze or the like, and there is no response even if PING is transmitted from the security terminal 10 to the ISP 7 multiple times, the security terminal 10 causes an abnormality in the communication device 3. It is determined that And if the abnormality of the communication apparatus 3 is detected, the security terminal 10 will output the contact disconnection signal of the contact of the relay 22 from the contact output part 15 as a restart signal. Thereby, the contact of the relay 22 is opened, the power supply from the power supply device 20 to the communication device 3 is cut off, and the communication device 3 completely stops its operation. Next, after a predetermined time has elapsed, the contact output unit 15 of the security terminal 10 outputs a contact signal for connection of the relay 22. As a result, power is again supplied to the communication device 3, and the communication device 3 is restarted. The interval at which the contact output unit 15 outputs the contact signal for disconnection and the contact signal for connection is a time sufficient for the communication device 3 to restart.

  As described above, when the configuration for monitoring the WAN-side network (WAN-side monitoring means) detects a communication abnormality, the contact output unit 15 that is a contact output means for power supply outputs a contact signal for disconnection to the relay 22. Then, after a predetermined time has elapsed, a connection contact signal is output, and the communication device 3 is restarted when the power is turned on / off. Therefore, when the WAN side network is disconnected due to an abnormality in the communication device 3, a communication error occurs. The security terminal 10 detects that the communication device 3 is restarted, and the connection to the WAN-side network can be automatically restored, leading to reduction of the burden on the user such as the time required for network restoration and the operation cost. . Note that when it is determined that an abnormality has occurred in at least one of the confirmation by the private IP address on the LAN side and the confirmation by the global IP address, the communication device 3 is restarted.

  Next, a method for confirming whether there is an abnormality in communication of the communication device 3 on the WAN side that does not depend on PING will be described. First, the case where the communication device 3 of the security system 1 is a UPnP router (IGD) will be described with reference to FIG. First, the address management unit 14 of the security terminal 10 makes an inquiry about the global IP address to the IGD that is the communication device 3. The communication device 3 that has received the inquiry about the global IP address notifies the security terminal 10 of the global IP address. If the global IP address is changed from the ISP 7 in the middle, the communication device 3 notifies the security terminal 3 of the changed global IP address at the time of the next inquiry from the security terminal 10. As described above, the security terminal 10 receives the notification of the global IP address from the communication device 3 in response to the inquiry of the global IP address, so that the communication device 3 has successfully acquired the global IP address, so that the WAN side It is determined that the communication device 3 is operating normally for communication.

  However, if the communication device 3 does not operate normally due to freeze or the like and has not acquired a global IP address, and there is no response even if an inquiry is sent from the security terminal 10 to the communication device 3 multiple times, The terminal 10 determines that an abnormality has occurred in the communication device 3. And if the abnormality of the communication apparatus 3 is detected, the security terminal 10 will output the contact disconnection signal of the contact of the relay 22 from the contact output part 15 as a restart signal. Thereby, the contact of the relay 22 is opened, the power supply from the power supply device 20 to the communication device 3 is cut off, and the communication device 3 completely stops its operation. Next, after a predetermined time has elapsed, the contact output unit 15 of the security terminal 10 outputs a contact signal for connection of the relay 22. As a result, power is again supplied to the communication device 3, and the communication device 3 is restarted. The interval at which the contact output unit 15 outputs the contact signal for disconnection and the contact signal for connection is a time sufficient for the communication device 3 to restart.

  As described above, the security terminal 10 includes the address management unit 14 that is a global IP address acquisition unit by accessing the UPnP router (IGD) that is the communication device 3 and monitors the WAN side network (WAN side) Monitoring means) monitors the communication abnormality depending on whether or not the global IP address can be acquired. Therefore, the security terminal 10 detects the communication abnormality even if the global IP address acquisition failure of the router is the cause, and the communication device 3 Can be automatically restored to connect to the WAN side network, leading to a reduction in the burden on the user such as the time required for network restoration and the operation cost.

  Next, another method for confirming whether there is any abnormality in the communication of the WAN side communication device 3 that does not depend on PING will be described. A case where the communication device 3 of the security system 1 accesses the global IP address acquisition server 8 via the IP communication network 5 will be described with reference to FIG. First, the address management unit 14 of the security terminal 10 tries to connect to the global IP address acquisition server 8 via the communication device 3 and the IP communication network 5. The global IP address acquisition server 8 that has received the connection notifies the security terminal 10 of the global IP address. When the global IP address of the security terminal 10 is changed halfway, the global IP address acquisition server 8 notifies the security terminal 10 of the changed global IP address at the next connection from the security terminal 10. . As described above, the security terminal 10 receives the notification of the global IP address from the global IP address acquisition server 8 with respect to the connection to the global IP address acquisition server 8 and thereby acquires the global IP address normally. It is determined that the communication device 3 is operating normally for WAN side communication.

  However, if the communication device 3 does not operate normally due to freeze or the like, the global IP address is not notified, and there is no response even if the security terminal 10 tries to connect to the global IP address acquisition server 8 multiple times, The security terminal 10 determines that an abnormality has occurred in the communication device 3. And if the abnormality of the communication apparatus 3 is detected, the security terminal 10 will output the contact disconnection signal of the contact of the relay 22 from the contact output part 15 as a restart signal. Thereby, the contact of the relay 22 is opened, the power supply from the power supply device 20 to the communication device 3 is cut off, and the communication device 3 completely stops its operation. Next, after a predetermined time has elapsed, the contact output unit 15 of the security terminal 10 outputs a contact signal for connection of the relay 22. As a result, power is again supplied to the communication device 3, and the communication device 3 is restarted. The interval at which the contact output unit 15 outputs the contact signal for disconnection and the contact signal for connection is a time sufficient for the communication device 3 to restart.

  As described above, the security terminal 10 includes the address management unit 14 which is a global IP address acquisition unit by accessing the global IP address acquisition server 8, and the configuration for monitoring the WAN side network (WAN side monitoring unit) is as follows. Since a communication abnormality is monitored depending on whether or not a global IP address can be acquired, the security terminal 10 detects that there is a communication abnormality even if a global IP address acquisition failure is the cause, and the communication device 3 is restarted automatically. The connection to the WAN-side network can be restored, leading to reduction of the burden on the user such as the time required for network restoration and the operation cost.

  As described above, according to the present invention, when the WAN-side network is disconnected due to an abnormality in the communication device, the security terminal detects the communication abnormality and automatically restarts the communication device. It is possible to provide a security system that can restore the connection to the WAN-side network and reduce the burden on the user such as the time required for network restoration and operation costs.

It is a lineblock diagram showing an example of a security system concerning the present invention. It is a timing chart which shows the operation | movement by the PING transmission / reception of the security system. It is a timing chart which shows operation in case the communication equipment of the security system is IGD. It is a timing chart which shows operation at the time of communicating with a global IP address acquisition server of the security system.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Security system 3 ... Communication equipment 5 ... IP communication network 7 ... ISP
8 ... Global IP address acquisition server 10 ... Security terminal 12 ... Processing unit 13 ... PING transmission / reception unit 14 ... Address management unit 15 ... Contact output unit 20 ... Power supply device 22 ···relay

Claims (3)

In the security system that transmits the security status of the facility subject to security via a telecommunication line such as the Internet,
A communication device that communicates with a communication terminal outside the security target facility using a global IP address;
A power supply device for supplying power to the communication device;
A relay provided between the communication device and the power supply device to turn on and off the power to the communication device;
A security terminal for monitoring the facility to be guarded,
The security terminal
WAN side monitoring means for monitoring the presence or absence of communication abnormality by the global IP address;
Power contact output means for outputting a contact signal to the relay,
When the WAN-side monitoring means detects a communication error, the power contact output means outputs a contact disconnect signal to the relay, and after a predetermined time has passed, outputs a connection contact signal. And restarting the communication device. The security terminal comprises a global IP address acquisition means by accessing a UPnP router that is the communication device;
2. The security system according to claim 1, wherein the WAN-side monitoring unit monitors a communication abnormality depending on whether or not the global IP address can be acquired. The security terminal comprises a global IP address acquisition means by accessing a global IP address acquisition server;
2. The security system according to claim 1, wherein the WAN-side monitoring unit monitors a communication abnormality depending on whether or not the global IP address can be acquired.

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