JP7336857B2 - CONTROL SYSTEM, CONNECTION STATE DETERMINATION METHOD AND PROGRAM - Google Patents

Description

The present invention relates to a control system, a connection state determination method, and a program.

A home energy management system (hereinafter referred to as "HEMS") that controls a water heater and other electric devices via a LAN (Local Area Network) constructed in a building has been proposed (see, for example, Patent Document 1). ). In this HEMS, the HEMS controller and water heater are each connected to a broadband router, and the HEMS controller controls the operation of the water heater by transmitting control signals to the water heater via the broadband router.

JP 2016-118332 A

By the way, the HEMS controller, the water heater, and the broadband router are often wired-connected to each other via, for example, a LAN cable. Specifically, the HEMS controller, the water heater, and the broadband router each have a LAN connection port having a common shape based on, for example, the TIA/EIA-568-B standard, and provided at both ends of the LAN cable. Wired connection is established by fitting the plugs connected to the respective LAN connection ports. In this case, since it is physically possible to connect the water heater to the HEMS controller via a LAN cable, the worker who builds the HEMS mistakenly connects the water heater that should be connected to the broadband router to the HEMS controller. There is a risk of connection. If so, there is a possibility that troubles such as malfunction of the water heater and failure of the water heater may occur. That is, if a device that can be connected to the HEMS controller or broadband router is connected in an inappropriate connection state different from the original appropriate connection state, there is a risk that problems such as malfunction and failure will occur.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a control system, a connection state determination method, and a program that can suppress the occurrence of malfunctions in devices caused by improper connection states of devices. and

In order to achieve the above object, the control system according to the present invention includes:
A control system for determining a connection state of a device connected to a network to which a control device that controls the device belongs,
a device information acquisition unit that acquires first device information specific to a device connected to the network;
a communication identification information acquisition unit that acquires first communication identification information assigned to a device connected to the network;
A combination of second device information and second communication identification information, which is preset to allow connection to the network when the connection state of the device to the network is appropriate, and the first device information and the first device information. a determination unit that determines the connection state of the device connected to the network based on the result of comparing the combination with the communication identification information;
a server connected to the network and having a device information storage unit that stores the second device information and a communication identification information storage unit that stores the second communication identification information ;
The determination unit compares a combination of the second device information obtained from the server and the second communication identification information obtained from the server with a combination of the first device information and the first communication identification information. Based on the results obtained, the connection status of the devices connected to the network is determined .

According to the present invention, the device information acquisition unit acquires the first device information unique to the device connected to the network, and the communication identification information acquisition unit acquires the first device information given to the device connected to the network. Acquire communication identification information. Then, the determination unit determines a combination of the preset second device information and the second communication identification information when the connection state of the device to the network is appropriate, and the first device information acquired by the device information acquisition unit. and the combination of the first communication identification information acquired by the communication identification information acquisition unit and the connection state of the device connected to the network is determined based on the result of comparison. As a result, it is possible to determine in advance whether the connection state of the device to the network is appropriate or inappropriate, so that it is possible to suppress the occurrence of malfunctions in the device caused by the inappropriate connection state of the device.

Schematic configuration diagram of a control system according to an embodiment of the present invention Block diagram showing the configuration of the terminal device according to the embodiment 1 is a block diagram showing the configuration of a control device according to an embodiment; FIG. (A) is a diagram showing an example of information stored in a connected device storage unit according to an embodiment, and (B) is a diagram showing an example of information stored in an attribute storage unit according to an embodiment; FIG. 4 is a diagram showing an example of information stored in an assigned address storage unit according to an embodiment; (A) shows an example of an inappropriate connection state in the control system according to the embodiment, and (B) shows another example of an inappropriate connection state in the control system according to the embodiment. figure 4 is a sequence diagram showing the operation of the control system according to the embodiment; FIG. 4 is a sequence diagram showing the operation of the control system according to the embodiment; FIG. (A) is a diagram showing an example of the display screen of the terminal device when the connection state is inappropriate in the control system according to the embodiment, and (B) is a case where the connection state is inappropriate in the control system according to the embodiment. A diagram showing another example of the display screen of the terminal device of 4 is a sequence diagram showing the operation of the control system according to the embodiment; FIG. 3 is a flowchart showing an example of the flow of connection state determination processing executed by the control device according to the embodiment; 3 is a flowchart showing an example of the flow of connection state determination processing executed by the control device according to the embodiment; Flowchart showing an example of the flow of connection state determination processing executed by a control device according to a modification Flowchart showing an example of the flow of connection state determination processing executed by a control device according to a modification Schematic configuration diagram of a control system according to a modification The figure which shows an example of the display screen of a terminal device when a connection state is inappropriate in the control system which concerns on a modification.

A control device and a control system including the control device according to embodiments of the present invention will be described below with reference to the accompanying drawings. A control system according to the present embodiment determines the connection status of devices connected to a network. This control system includes a device information acquisition unit that acquires first device information unique to a device connected to the network, and a communication identification information acquisition unit that acquires first communication identification information assigned to the device connected to the network. and a determination unit that determines the connection state of the device connected to the network. Here, the determination unit determines a combination of the preset second device information and the second communication identification information when the connection state of the device to the network is appropriate, and the first device acquired by the device information acquisition unit. The connection state of the device connected to the network is determined based on the result of comparing the combination of the information and the first communication identification information acquired by the communication identification information acquisition unit.

As shown in FIG. 1, the control system according to the present embodiment includes a router 3 connected to a wide area network NT1 via a data circuit terminating device 4, a device 24 wired to the router 3, and a It includes a control device 1 connected by wire, devices 21 , 22 and 23 connected by wire to the control device 1 , and a terminal device 7 . The control device 1 and the devices 21, 22, 23, and 24 communicate with each other using a communication protocol based on, for example, the ECHONET Lite standard. The terminal device 7 is capable of wireless communication with the control device 1 . Here, the wide area network NT1 is, for example, a wide area network using public lines. The controller 1, the router 3, and the devices 21, 22, 23, and 24 are wired to form a local network NT2. The router 3 is, for example, a broadband router and has a function as a DHCP (Dynamic Host Configuration Protocol) server. The router 3 assigns an IP address to a device under its control (for example, the device 24). This IP (Internet Protocol) address is assigned to the device 24 according to the connection request information received by the router 3 from the device 24 that is directly wired connected to the router 3 as its subordinate. This IP address conforms to the IPv4 standard and is represented, for example, as "192.168.10.XYZ" (XYZ is a unique value within the range of "002 to 254", for example). Here, for example, the segment area of the IP address assigned to the device 24 directly wired-connected to the router 3, that is, the portion "192.168.10" is common among the devices directly wired-connected to the router 3. is set to be The default value of the segment area portion is determined for each manufacturer of the router 3, and the same default value is rarely used by different manufacturers.

The device 21 is, for example, a home air conditioner manufactured by Company A, the device 22 is, for example, a home air conditioner manufactured by Company B, and the device 23 is, for example, a home air conditioner manufactured by Company A. of photovoltaic generators and inverters. Also, the device 24 is a lighting device manufactured by C company. When each of the devices 21, 22, 23, and 24 is directly wired-connected to the control device 1 or the router 3, immediately after that, the devices 21, 22, 23, and 24 send connection request information for requesting the assignment of an IP address to the control device 1 or the router 3. Send to control device 1 or router 3 . Further, when the devices 21, 22, 23, and 24 are connected to the control device 1 or the router 3 and the activation operation is completed, the devices 21, 22, 23, and 24 transmit the activation notification information to that effect to the other devices 21, 22, 23, and 23, respectively. 24, multicast to the control device 1 and router 3; This activation notification information is, for example, an instance list notification in ECHONET Lite, and includes model identification information for identifying the models of the devices 21 , 22 , 23 , and 24 . Furthermore, when the devices 21, 22, 23, and 24 receive device information request information requesting transmission of unique device information specific to the devices 21, 22, 23, and 24 from the control device 1, at least the manufacturer identification information and the device name are received. to the control device 1. Here, the maker identification information is information for identifying manufacturers of the devices 21, 22, 23, and 24, and the device name information is information indicating the name of the device.

The terminal device 7 is a mobile terminal such as a smart phone or a tablet, and as shown in FIG. Auxiliary storage unit 703 which is a non-volatile memory such as semiconductor flash memory, wireless communication interface 704 for wireless communication with control device 1, display unit 705, input unit 706, and bus 709 interconnecting these. and have The auxiliary storage unit 703 stores programs for realizing various functions of the terminal device 7 . Examples of the program include an application for displaying information indicating the determination result by the control device 1 on the display unit 705 . This application may be provided, for example, in a form integrated with an application installed in the control device 1 for remotely controlling the devices 21, 22, 23, and 24. FIG. The display unit 705 is, for example, a liquid crystal display, and displays information indicating the determination result by the control device 1, for example. The input unit 706 is a touch panel, for example, and is operated by the user of the terminal device 7 . The wireless communication interface 704 is, for example, a wireless module, and wirelessly communicates with the control device 1 .

The CPU 701 functions as a determination result acquisition unit 711 and a display control unit 712 by reading out a program stored in the auxiliary storage unit 703 to the main storage unit 702 and executing the program. The auxiliary storage unit 703 also has a determination result storage unit 731 that stores determination result information received from the control device 1 . The determination result acquisition unit 711 acquires determination result information indicating the determination result regarding the connection status of the devices 21, 22, 23, and 24 to the local network NT2, which is transmitted from the control device 1, and transmits the acquired determination result information. Stored in the determination result storage unit 731 . When the input unit 706 receives a preset operation by the user of the terminal device 7 , the display control unit 712 causes the display unit 705 to display the determination result information stored in the determination result storage unit 731 .

As shown in FIG. 3, the control device 1 includes a CPU 101, a main storage unit 102 which is a volatile memory used as a work area for the CPU 101, and an auxiliary storage unit which is a nonvolatile memory such as a magnetic disk or a semiconductor flash memory. 103, a wired communication interface 104 for communicating with the devices 21, 22, 23, 24 via the local network NT2, a wireless communication interface 105 for wireless communication with the terminal device 7, and a bus interconnecting them. 109 and . The auxiliary storage unit 103 stores programs for realizing various functions of the control device 1 . The wired communication interface 104 is connected to the local network NT2 and communicates with the devices 21, 22, 23 and 24 via the local network NT2. The wireless communication interface 105 is, for example, a wireless module, and wirelessly communicates with the terminal device 7 .

The CPU 101 reads the program stored in the auxiliary storage unit 103 into the main storage unit 102 and executes it, thereby obtaining the DHCP processing unit 111, the activation notification information reception unit 112, the IP address extraction unit 113, the model information extraction unit 114, the specific device It functions as an information acquisition unit 115 , a determination unit 116 , a determination result generation unit 117 and a determination result transmission unit 118 . Auxiliary storage unit 103 has connected device storage unit 131 , attribute storage unit 132 , assigned address storage unit 133 , and determination result storage unit 134 . As the CPU 101 functions as the DHCP processing unit 111, it functions as a DHCP server.

For example, as shown in FIG. 4A, the connected device storage unit 131 stores manufacturer identification information, model identification information, IP Stores address information and device name information. The maker identification information is information for identifying the maker that manufactured the control device 1 and the devices 21 , 22 , 23 , and 24 . The model identification information is information for identifying the types of the control device 1 or the devices 21 , 22 , 23 , and 24 . In the example shown in FIG. 4A, the model identification information is "IDD1" for the control device 1, "IDD2" for the home air conditioner, "IDD3" for the home power generator, and "IDD4" for the lighting device. Granted. The IP address information is second communication identification information indicating an IP address assigned by the control device 1 or router 3 . This IP address conforms to the IPv4 standard and is represented, for example, as "192.168.32.ABC" (ABC is a unique value within the range of "002 to 254", for example). Here, for example, the segment area of the IP addresses assigned to the devices 21, 22, and 23 that are directly wired connected to the control device 1, that is, the portion "192.168.32" is common. The default value of this segment area is determined for each manufacturer of the control device 1, as described above, and the same default value is rarely adopted by different manufacturers. The device name information is information indicating the names of the control device 1 and the devices 21, 22, 23, and 24, respectively.

For example, as shown in FIG. 4B, the attribute storage unit 132 stores attribute information such as manufacturer identification information and model identification information of devices that are permitted to be directly wired connected to the control device 1. It is a storage unit. In the example shown in FIG. 4B, a home air conditioner, a home power generator, and a lighting device manufactured by “Company A” or “Company D” are connected directly to the control device 1 by wire. It shows an example of when it is allowed. The attribute information may be stored in advance in the attribute storage unit 132 before the control device 1 is activated, or may be stored via an input unit (not shown) provided in the control device 1 after the control device 1 is activated. may be manually or automatically input to the attribute storage unit 132.

For example, as shown in FIG. 5, the assigned address storage unit 133 is a communication identification information storage that stores IP address information, which is the first communication identification information to be assigned to the devices 21, 22, and 23 that are directly wired connected to the control device 1. Department. In the example shown in FIG. 5, the assigned address storage unit 133 stores the assigned address group belonging to the first group whose segment area is "192.168.32" and the second address group whose segment area is "192.168.33". It stores IP address information indicating a given address group belonging to a group.

Returning to FIG. 3, the determination result storage unit 134 stores the determination result information indicating the connection state determination results of the devices 21, 22, 23, and 24 connected to the local network NT2 to the devices 21, 22, 23, 24 IP address information, manufacturer identification information, model identification information, and device name information are stored in association with each other.

The DHCP processing unit 111 is a communication identification information assigning unit that assigns IP addresses to the devices 21 , 22 , and 23 that are directly wired connected to the control device 1 based on the IP address information stored in the assigned address storage unit 133 . The DHCP processing unit 111 assigns IP addresses to devices under control of the control device 1 (for example, the devices 21, 22, and 23). The IP addresses are assigned to the devices 21, 22, and 23 according to the connection request information received from the devices 21, 22, and 23 that are directly connected to the control device 1 by wire by the DHCP processing unit 111. FIG. This IP address also conforms to the IPv4 standard and is represented, for example, as "192.168.32.ABC" (ABC is a unique value within the range of "002 to 254", for example). Here, for example, the segment area of the IP address assigned to the device 24 directly wired-connected to the router 3, that is, the portion "192.168.10" is common among the devices directly wired-connected to the router 3. is set to be The default value of the segment area portion is determined for each manufacturer of the control device 1, and the same default value is rarely used by different manufacturers. The DHCP processing unit 111 transmits IP address information indicating IP addresses to be assigned to the devices 21, 22, and 23 corresponding to the received connection request information. Also, the DHCP processing unit 111 causes the connected device storage unit 131 to store the IP address information transmitted to the devices 21 , 22 and 23 .

The activation notification information receiving unit 112 receives activation notification information transmitted from the devices 21, 22, 23, and 24 wired to the local network NT2. Upon receiving the activation notification information from the devices 21, 22, 23, and 24, the activation notification information receiving unit 112 transmits reception notification information notifying that the activation notification information has been received to the IP address extraction unit 113 and the model information extraction unit 114. Notice.

When the IP address extraction unit 113 is notified of the reception notification information from the activation notification information reception unit 112, the IP address extraction unit 113 extracts the IP address information assigned to the devices 21, 22, 23, and 24 connected to the local network NT2 as the activation notification information. It is a communication identification information acquisition unit that extracts and acquires from. The IP address extraction unit 113 notifies the model information extraction unit 114 of the acquired IP address information.

When receiving the reception notification information from the activation notification information receiving unit 112, the model information extraction unit 114 extracts the model identification information unique to the devices 21, 22, 23, and 24 connected to the local network NT2 from the activation notification information. Extract and get. Then, the model information extraction unit 114 causes the connected device storage unit 131 to store the acquired model identification information in association with the IP address information notified from the IP address extraction unit 113 .

The unique device information acquisition unit 115 acquires manufacturer identification information and device name information unique to the devices 21, 22, 23, and 24 connected to the local network NT2. After receiving the activation notification information from the devices 21, 22, 23, and 24, the unique device information acquisition unit 115 refers to the IP address information stored in the connected device storage unit 131, and identifies the devices 21 connected to the local network NT2. , 22, 23, and 24 to receive unique device information from the devices 21, 22, 23, and 24. Here, the device information request information is, for example, a message requesting the device 21, 22, 23, and 24 for manufacturer identification information and device name information. Then, the unique device information acquisition unit 115 acquires by analyzing the received unique device information and extracting the manufacturer identification information and the device name information included in the unique device information. Model identification information, manufacturer identification information, and device name information unique to the devices 21, 22, 23, and 24 connected to the local network NT2 are acquired from this unique device information acquisition unit 115 and the aforementioned model information extraction unit 114. A device information acquisition unit 119 is configured.

The determination unit 116 determines a combination of preset model identification information, manufacturer identification information, and IP address information when the connection state of the devices 21, 22, 23, and 24 to the local network NT2 is appropriate, and the connected device storage unit. Based on the result of comparing the combination of model identification information, manufacturer identification information and IP address information stored by 131, the connection status of the devices 21, 22, 23 and 24 connected to the local network NT2 is determined. Specifically, the determination unit 116 determines that the model identification information and the manufacturer identification information stored in the attribute storage unit 132 match the model identification information and the manufacturer identification information stored in the connected device storage unit 131, and the assigned address storage When the IP address information stored by the unit 133 and the IP address information stored by the connected device storage unit 131 match, it is determined that the connection state of the devices 21, 22, 23, and 24 to the local network NT2 is appropriate. do. On the other hand, if the model identification information and the manufacturer identification information stored in the attribute storage unit 132 do not match the model identification information and the manufacturer identification information stored in the connected device storage unit 131, the determination unit 116 determines whether the given address storage unit 133 does not match the IP address information stored in the connected device storage unit 131, it is determined that the connection state of the devices 21, 22, 23, and 24 to the local network NT2 is inappropriate.

The determination result generation unit 117 generates the determination result of the determination unit 116 for each of the devices 21, 22, 23, and 24 as model identification information, manufacturer identification information, device name information, and IP address of each of the devices 21, 22, 23, and 24. Generate determination result information associated with the information. The determination result generation unit 117 causes the determination result storage unit 134 to store the generated determination result information. The determination result transmission unit 118 transmits the determination result information stored in the determination result storage unit 134 to the terminal device 7 when a preset determination result transmission time arrives. The determination result transmission timing can be set to arrive periodically, for example.

Next, the operation of the control system according to this embodiment will be described with reference to FIGS. 6 to 10. FIG. First, as shown in FIG. 6A, the case where the device 25, which is the air conditioner of Company C, is directly connected to the control device 1 by wire will be described. Here, it is assumed that direct wired connection to the control device 1 is not permitted between the device 25 and the device 24, which is the lighting device of company C. FIG. In this case, as shown in FIG. 7, for example, when the device 25 is directly connected to the control device 1 by wire, connection request information requesting the control device 1 to assign an IP address to the device 25 is sent from the device 25. It is transmitted to the control device 1 (step S1). On the other hand, when the control device 1 receives the connection request information, IP address information indicating the IP address assigned to the device 25 is transmitted from the control device 1 to the device 25 (step S2). When the connection state of the local network NT2 is the state shown in FIG. 6A, the control device 1 assigns "192.168 .32” is assigned. After receiving the IP address information, the devices 21, 25, and 23 recognize the assigned IP addresses, and thereafter communicate with the control device 1 using the assigned IP addresses. The device 24 is assigned an IP address by the router 3 that functions as a DHCP server. The IP address assigned to this device 24 is set to an IP address different from the IP address indicated by the IP address information stored in the assigned address storage unit 133 . Specifically, the router 3 gives the device 24 an IP address starting with "192.168.10". Then, when the device 25 completes activation after receiving the IP address information (step S3), activation notification information including model identification information and IP address information indicating the assigned IP address is transmitted from the device 25 to the controller. 1 (step S4).

On the other hand, when receiving the activation notification information, the control device 1 extracts the model identification information from the received activation notification information and stores it in the connected device storage unit 131 (step S5). At this time, the control device 1 causes the connected device storage unit 131 to store the extracted model identification information in association with the IP address information extracted from the received activation notification information. Next, device information request information is sent from the control device 1 to the device 25, which requests the device 25, which is the source of the activation notification information, to transmit unique device information specific to the device 25 (step S6). . On the other hand, when the device 25 receives the device information request information, the unique device information including the manufacturer identification information and the device name information of the device 25 is transmitted from the device 25 to the control device 1 (step S7).

On the other hand, when receiving the unique device information, the control device 1 extracts the manufacturer identification information and the device name information of the device 25 from the received unique device information and stores them in the connected device storage section 131 (step S8). Subsequently, the control device 1 determines that the model identification information and the manufacturer identification information stored in the attribute storage unit 132 do not match the model identification information and the manufacturer identification information of the device 25 stored in the connected device storage unit 131. Assume that it is determined (step S9) that the IP address information stored in the assigned address storage unit 133 and the IP address information assigned to the device 25 stored in the connected device storage unit 131 match (step S10). Specifically, the control device 1 stores the IP address (for example, “192.168.32.103”) assigned to the device 25 stored in the connected device storage unit 131 and the IP address stored in the assigned address storage unit 133. information, and determines that the IP address segment portion (“192.168.32”) matches. In this case, the control device 1 generates determination result information indicating that the connection state of the device 25 to the local network NT2 is inappropriate, and stores the generated determination result information in the determination result storage unit 134 (step S11). ). That is, since the device 25 for which direct wired connection to the control device 1 is not permitted is connected to the control device 1, the control device 1 determines that the connection state of the device 25 to the local network NT2 is inappropriate. judge.

When the device 24 is directly connected to the router 3 by wire, the device 24 transmits to the router 3 connection request information requesting the router 3 to assign an IP address to the device 24 (step S12). On the other hand, when the router 3 receives the connection request information, IP address information indicating the IP address assigned to the device 24 is transmitted from the router 3 to the device 24 (step S13). Then, when the device 24 completes activation after receiving the IP address information (step S14), the device 24 receives the activation notification information including the model identification information of the device 24 and the IP address information indicating the assigned IP address. to the router 3 (step S15). At this time, the activation notification information received by the router 3 from the device 24 is transferred from the router 3 to the control device 1 (step S16).

On the other hand, as shown in FIG. 8, when the control device 1 receives the activation notification information from the router 3, it extracts the model identification information from the received activation notification information and stores it in the connected device storage unit 131 (step S17). . At this time, the control device 1 causes the connected device storage unit 131 to store the extracted model identification information in association with the IP address information extracted from the received activation notification information. Next, device information request information is sent from the control device 1 to the router 3, requesting the device 24, which is the source of the activation notification information, to transmit unique device information specific to the device 24 (step S18). . At this time, the device information request information received by the router 3 from the control device 1 is transferred from the router 3 to the device 24 (step S19). On the other hand, when the device 24 receives the device information request information, the unique device information including the manufacturer identification information and the device name information of the device 24 is transmitted from the device 24 to the router 3 (step S20). At this time, the specific device information received by the router 3 from the device 24 is transferred from the router 3 to the control device 1 (step S21).

On the other hand, when receiving the unique device information, the control device 1 extracts the manufacturer identification information and the device name information of the device 24 from the received unique device identification information, and stores them in the connected device storage section 131 (step S22). Subsequently, the control device 1 determines that the model identification information and the manufacturer identification information stored in the attribute storage unit 132 do not match the model identification information and the manufacturer identification information of the device 25 stored in the connected device storage unit 131. Assume that it is determined (step S23) that the IP address information stored in the assigned address storage unit 133 and the IP address information assigned to the device 25 stored in the connected device storage unit 131 do not match (step S24). Specifically, the control device 1 stores the IP address (for example, “192.168.10.2”) assigned to the device 24 stored in the connected device storage unit 131 and the IP address stored in the assigned address storage unit 133. information, and determines that the IP address segment portion (“192.168.32”) does not match. In this case, the control device 1 generates determination result information indicating that the device 24 is appropriately connected to the local network NT2, and stores the generated determination result information in the determination result storage unit 134 (step S25). . That is, since the device 24 that is not permitted to be directly connected to the control device 1 by wire is connected to the router 3, the control device 1 determines that the connection state of the device 24 to the local network NT2 is appropriate. do.

After that, when it is time to transmit the determination result of the connection state of the devices 21, 25, 23, and 24 to the local network NT2 to the terminal device 7, the determination result information stored in the determination result storage unit 134 is transmitted from the control device 1 to the terminal device. It is transmitted to the device 7 (step S26). On the other hand, when receiving the determination result information, the terminal device 7 stores the received determination result information in the determination result storage unit 731 . Then, when accepting the preset operation, the terminal device 7 causes the display section 705 to display the determination result information stored in the determination result storage section 731 (step S27). At this time, the terminal device 7 displays a determination result screen showing a list of determination results for each of the devices 21, 25, 23, and 24 on the display screen 705a of the display unit 705, as shown in FIG. display. Here, in the "connection destination" column, the determination result of the connection state to the local network NT2 is displayed with "o" and "x". Here, "o" indicates that the connection state is appropriate, and "x" indicates that the connection state is inappropriate. In the example shown in FIG. 9(A), an IP address with a segment area of "192.168.32" is assigned to "air conditioner 2", which is an air conditioner of company C, and the controller 1 is directly wired. Since it is connected, the determination result of "air conditioner 2" is "x", that is, the connection state is inappropriate.

Next, as shown in FIG. 6B, the case where the device 22, which is the air conditioner of Company B, is directly connected to the router 3 by wire will be described. Here, it is assumed that the device 22, which is the air conditioner of Company B, is permitted to be directly connected to the control device 1 by wire. In this case, as shown in FIG. 10, when the device 22 is directly connected to the router 3 by wire, connection request information requesting the router 3 to assign an IP address to the device 22 is sent from the device 22 to the router 3. It is transmitted (step S31). On the other hand, when the router 3 receives the connection request information, IP address information indicating the IP address assigned to the device 22 is transmitted from the router 3 to the device 22 (step S32). When the device 22 completes activation after receiving the IP address information (step S33), the device 22 receives the activation notification information including the model identification information of the device 22 and the IP address information indicating the assigned IP address. to the router 3 (step S34). At this time, the activation notification information received by the router 3 from the device 22 is transferred from the router 3 to the control device 1 (step S35).

On the other hand, when receiving the activation notification information from the router 3, the control device 1 extracts the model identification information from the received activation notification information and stores it in the connected device storage unit 131 (step S36). At this time, the control device 1 causes the connected device storage unit 131 to store the extracted model identification information in association with the IP address information extracted from the received activation notification information. Next, device information request information for requesting transmission of specific device information unique to the device 24 to the device 22, which is the transmission source of the activation notification information, is transmitted from the control device 1 to the router 3 (step S37). . At this time, the device information request information received by the router 3 from the control device 1 is transferred from the router 3 to the device 22 (step S38). On the other hand, when the device 22 receives the device information request information, the unique device information including the manufacturer identification information and the device name information of the device 22 is transmitted from the device 22 to the router 3 (step S39). At this time, the specific device information received by the router 3 from the device 22 is transferred from the router 3 to the control device 1 (step S40).

On the other hand, when receiving the unique device information, the control device 1 extracts the manufacturer identification information and the device name information of the device 24 from the received unique device information and stores them in the connected device storage section 131 (step S41). Subsequently, the control device 1 determines that the model identification information and the manufacturer identification information stored in the attribute storage unit 132 match the model identification information and the manufacturer identification information of the device 25 stored in the connected device storage unit 131 ( In step S42), it is determined that the IP address information stored in the assigned address storage unit 133 and the IP address information assigned to the device 25 stored in the connected device storage unit 131 do not match (step S43). In this case, the control device 1 generates determination result information indicating that the connection state of the device 22 to the local network NT2 is inappropriate, and stores the generated determination result information in the determination result storage unit 134 (step S44). ). That is, since the device 22, which is permitted to be directly connected by wire to the control device 1, is connected to the router 3, the control device 1 is not suitable for the connection state of the device 24 to the local network NT2. Determine that there is.

After that, the same processing as steps S26 and S27 described above is executed. In this case, as shown in FIG. 9B, for example, the terminal device 7 is assigned an IP address with a segment area of "192.168.10" for "air conditioner 2", which is an air conditioner of company B. Since it is directly connected to the router 3 by wire, the determination result of "air conditioner 2" is "x", that is, the connection state is inappropriate.

Next, connection state determination processing executed by the control device 1 according to the present embodiment will be described with reference to FIGS. 11 and 12. FIG. This connection state determination process is started, for example, when the control device 1 is powered on. First, the DHCP processing unit 111 determines whether or not connection request information has been received from the devices 21, 22, 23, and 24 (step S101). When the DHCP processing unit 111 determines that the connection request information has not been received (step S101: No), the process of step S117, which will be described later, is executed.

On the other hand, when the DHCP processing unit 111 determines that the connection request information has been received (step S101: Yes), it refers to the assigned address storage unit 133 to determine whether the devices 21, 22, 23, and 24, which are the transmission sources of the connection request information, is specified (step S102). Next, the DHCP processing unit 111 transmits IP address information indicating the specified IP address to the devices 21, 22, 23, and 24 that are the transmission sources of the connection request information (step S103).

Subsequently, the activation notification information receiving unit 112 determines whether or not activation notification information is received during a preset reference waiting period after the IP address information is transmitted to the devices 21, 22, 23, and 24. (Step S104). When the boot notification information receiving unit 112 determines that the boot notification information has not been received during the reference standby period (step S104: No), the process of step S117, which will be described later, is executed. On the other hand, when the boot notification information receiving unit 112 determines that the boot notification information has been received during the reference standby period (step S104: No), the boot notification information receiving unit 112 sends the reception notification information notifying that the boot notification information has been received to the IP address. The extraction unit 113 and the model information extraction unit 114 are notified. Then, the IP address extraction unit 113 extracts IP address information corresponding to the devices 21, 22, 23, and 24 as the transmission source from the received activation notification information (step S105). Here, the IP address extraction unit 113 notifies the model information extraction unit 114 of the acquired IP address information.

After that, the model information extraction unit 114 extracts the model identification information corresponding to the devices 21, 22, 23, and 24 that are the transmission sources from the received activation notification information, and stores the extracted model identification information in the connection device storage unit 131. It is stored (step S106). Here, the model information extraction unit 114 stores the acquired model identification information in the connected device storage unit 131 in association with the IP address information notified from the IP address extraction unit 113 .

Next, the unique device information acquisition unit 115 transmits the device information request information to the devices 21, 22, 23, and 24, which are the transmission sources of the activation notification information (step S107). At this time, when the devices 21, 22, 23, and 24 that have transmitted the activation notification information receive the device information request information, the devices 21, 22, 23, and 24 corresponding to the specific device including the manufacturer identification information and the device name information. Information is sent to the controller 1 . Then, the unique device information acquisition unit 115 receives the unique device information transmitted from the devices 21, 22, 23, and 24 (step S108).

Subsequently, the unique device information acquisition unit 115 extracts the manufacturer identification information and device name information included in the received unique device information, and stores the extracted manufacturer identification information and device name information in the connected device storage unit 131 ( step S109).

After that, the determination unit 116 determines whether or not the model identification information and the manufacturer identification information stored in the attribute storage unit 132 match the model identification information and the manufacturer identification information stored in the connected device storage unit 131 (step S110). ). Assume that the determination unit 116 determines that the model identification information and the manufacturer identification information stored in the attribute storage unit 132 match the model identification information and the manufacturer identification information stored in the connected device storage unit 131 (step S110: Yes). In this case, the determination unit 116 determines whether or not the IP address information stored in the assigned address storage unit 133 and the IP address information stored in the connected device storage unit 131 match (step S111). Here, when determining unit 116 determines that the IP address information stored in assigned address storage unit 133 and the IP address information stored in connected device storage unit 131 match (step S111: Yes), local network NT2 It is determined that the connection state of the devices 21, 22, 23, and 24 to is appropriate (step S112). On the other hand, when determining unit 116 determines that the IP address information stored in assigned address storage unit 133 and the IP address information stored in connected device storage unit 131 do not match (step S111: No), the device to local network NT2 21, 22, 23 and 24 are determined to be inappropriate (step S114). After that, the process of step S115, which will be described later, is executed.

Assume that the determination unit 116 determines that the model identification information and the manufacturer identification information stored in the attribute storage unit 132 do not match the model identification information and the manufacturer identification information stored in the connected device storage unit 131 (step S110: No). In this case, the determination unit 116 determines whether or not the IP address information stored in the assigned address storage unit 133 and the IP address information stored in the connected device storage unit 131 match (step S113). Here, if the determination unit 116 determines that the IP address information stored in the assigned address storage unit 133 and the IP address information stored in the connected device storage unit 131 do not match (step S113: No), the connection to the local network NT2 is performed. It is determined that the connection states of the devices 21, 22, 23, and 24 are appropriate (step S112). On the other hand, when the determination unit 116 determines that the IP address information stored in the assigned address storage unit 133 and the IP address information stored in the connected device storage unit 131 match (step S113: Yes), the device 21 to the local network NT2 , 22, 23, and 24 are determined to be inappropriate (step S114).

After that, as shown in FIG. 12, the determination result generation unit 117 generates the determination results of the determination unit 116 for the devices 21, 22, 23, and 24 as model identification information and manufacturer identification information for each of the devices 21, 22, 23, and 24. The determination result information associated with the information, the device name information and the IP address information is generated (step S115). Then, the determination result generation unit 117 stores the generated determination result information in the determination result storage unit 134 (step S116). Next, the determination result transmission unit 118 determines whether or not the time for transmitting the determination result described above has arrived (step S117). When the determination result transmission unit 118 determines that the determination result transmission time has not come yet (step S117: No), the process of step S101 is executed again. On the other hand, when the determination result transmission unit 118 determines that the aforementioned determination result transmission time has come (step S117: Yes), it transmits the determination result information stored in the determination result storage unit 134 to the terminal device 7 (step S118). . After that, the process of step S101 is executed again.

As described above, according to the control device 1 according to the present embodiment, the device information acquisition unit 119 obtains the model identification information and manufacturer identification unique to the devices 21, 22, 23, and 24 connected to the local network NT2. Information is obtained, and the IP address extraction unit 113 obtains IP address information assigned to the devices 21, 22, 23, and 24 connected to the local network NT2. Then, the determination unit 116 determines the combination of the model identification information, the manufacturer identification information, and the IP address information when the connection state of the devices 21, 22, 23, and 24 to the local network NT2 is appropriate, and the device information acquisition unit 119 Based on the result of comparing the combination of the obtained model identification information and manufacturer identification information with the IP address information obtained by the IP address extraction unit 113, the identification of the devices 21, 22, 23, and 24 connected to the local network NT2 is performed. Determine connection status. Specifically, the determination unit 116 determines that the model identification information and the manufacturer identification information stored in the attribute storage unit 132 match the model identification information and the manufacturer identification information stored in the connected device storage unit 131, and the assigned address storage When the IP address information stored by the unit 133 and the IP address information stored by the connected device storage unit 131 match, it is determined that the connection state of the devices 21, 22, 23, and 24 to the local network NT2 is appropriate. do. On the other hand, if the model identification information and the manufacturer identification information stored in the attribute storage unit 132 do not match the model identification information and the manufacturer identification information stored in the connected device storage unit 131, the determination unit 116 determines whether the given address storage unit 133 does not match the IP address information stored in the connected device storage unit 131, it is determined that the connection state of the devices 21, 22, 23, and 24 to the local network NT2 is inappropriate. As a result, it is possible to determine in advance whether the connection state of the devices 21, 22, 23, and 24 to the local network NT2 is appropriate or inappropriate. It is possible to suppress the occurrence of troubles in the devices 21, 22, 23, and 24 due to the connection state of the.

By the way, in recent years, with the popularization of the ZEH (Zero Energy House) system and the support of the ZEH subsidy system, there are an increasing number of cases of building houses that can receive the application of the ZEH system, that is, ZEH houses. In this ZEH house, a HEMS (Home Energy Management System) constructed by connecting devices having a wired communication interface or a wireless communication interface via a network is often introduced. In this type of HEMS, a controller installed in a house acquires various information from equipment installed in the house and controls the operation of the equipment. In this type of HEMS, a controller is connected to a wide area network via a router in order to monitor the operation status of equipment installed inside the house from outside the house and to control the operation of the equipment. is becoming mainstream. In addition, as the equipment for constructing the HEMS, the current situation is that there is a mixture of equipment that is connected to the wide area network via the controller by wire connection and equipment that is directly connected to the router by wire. is.

However, the wired connection port of the controller and the wired connection port of the router generally adopt the same connector shape based on, for example, the TIA/EIA-568-B standard. Therefore, it is also possible to directly wire-connect a device that functions by being directly wired-connected to the router to the controller. Therefore, there is a risk that a worker who builds the HEMS may mistakenly connect a device that should be directly wired to the router to the controller by wire. In this case, the device may not operate normally or a stable communication network cannot be constructed, which may cause problems such as interruption of communication with the device. In addition, for example, controller instruction manuals often include a list of devices that can be directly connected by wire. do not have. Furthermore, at the site where the HEMS is constructed, it is sufficiently assumed that the HEMS construction work will be performed by workers who are not highly skilled. Moreover, it is conceivable that even an operator with a high degree of proficiency may erroneously connect devices due to carelessness. In addition, there are cases where the connection between the controller and the device is left in an inappropriate state, and an inquiry is made to the controller maker or the device maker only after a problem in the operation of the device becomes apparent, and the response is delayed. Met.

On the other hand, in the control system according to the present embodiment, as described above, it is determined in advance whether the connection state of the devices 21, 22, 23, and 24 to the local network NT2 is appropriate or inappropriate. Therefore, the equipment 21, 22, 23, 24 may malfunction due to the inappropriate connection state of the equipment 21, 22, 23, 24, or the communication failure with the equipment 21, 22, 23, 24 may occur. can be suppressed. Therefore, there is also the advantage that the maker of the control device 1 or the makers of the devices 21, 22, 23, 24 can reduce the costs required to respond to inquiries from these users.

Further, the control device 1 according to the present embodiment provides a plurality of IP address information corresponding to the IP address information stored in the assigned address storage unit 133 in each of the devices 21, 22, 23, and 25 directly connected to the control device 1 by wire. A DHCP processing unit 111 is provided for assigning an IP address selected from addresses. This eliminates the need to set IP addresses in advance for the devices 21, 22, 23, and 25 that are directly connected to the control device 1 by wire, thereby facilitating the construction of the local network NT2.

Furthermore, the control device 1 according to the present embodiment includes a determination result generation unit 117 that generates determination result information indicating the determination result of the determination unit 116, and a determination result transmission unit 118 that transmits the determination result information to the terminal device 7. , provided. As a result, the state of connection of the devices 21, 22, 23, and 24 to the local network NT2 can be confirmed by the mobile terminal device 7, so the state of connection of the devices 21, 22, 23, and 24 to the local network NT2 There is an advantage that it becomes easy to confirm the

Further, the control device 1 according to the present embodiment includes an attribute storage section 132 and an assigned address storage section 133 . This makes it possible to determine the connection status of the devices 21, 22, 23, and 24 to the local network NT2 even in a situation where the local network NT2 cannot be connected to the external wide area network NT1, for example.

Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments. For example, the control device 1 combines the model identification information and the IP address information when the devices 21, 22, 23, and 24 are properly connected to the local network NT2, and the model identification stored in the connected device storage unit 131. The connection status of the devices 21, 22, 23, and 24 connected to the local network NT2 may be determined based on the result of comparing the combination of the information and the IP address information.

Here, the connection state determination processing executed by the control device 1 according to this modification will be described with reference to FIG. 13 . In the connection state determination process according to this modification, the processes from steps S101 to S106 in FIG. 11 described in the first embodiment are performed. Next, without transmitting the device information request information to the devices 21, 22, 23, and 24, the determination unit 116 determines the model identification information stored in the attribute storage unit 132 and the model identification information stored in the connected device storage unit 131. matches (step S201). Here, when the determination unit 116 determines that the model identification information stored in the attribute storage unit 132 and the model identification information stored in the connected device storage unit 131 match (step S201: Yes), as described in the first embodiment, The processes after step S111 in FIG. 11 are executed. On the other hand, when the determination unit 116 determines that the model identification information stored in the attribute storage unit 132 and the model identification information stored in the connected device storage unit 131 do not match (step S201: No), The processes after step S113 in FIG. 11 are executed.

According to this configuration, the connection status of the devices 21, 22, 23, and 24 to the local network NT2 can be determined without receiving the unique device information from the devices 21, 22, 23, and 24. 1 is simplified, and the processing load of the control device 1 is reduced.

Alternatively, the control device 1 stores the combination of the manufacturer identification information and the IP address information when the devices 21, 22, 23, and 24 are properly connected to the local network NT2, and the manufacturer identification stored in the connected device storage unit 131. The connection status of the devices 21, 22, 23, and 24 connected to the local network NT2 may be determined based on the result of comparing the combination of the information and the IP address information.

Here, the connection state determination processing executed by the control device 1 according to this modification will be described with reference to FIG. 14 . In the connection state determination process according to this modification, the processes from steps S101 to S105 in FIG. 11 described in the first embodiment are performed. Next, without extracting the model identification information corresponding to the transmission source devices 21, 22, 23, and 24 from the received activation notification information, the unique device information acquisition unit 115 obtains the device information request information as It is transmitted to the devices 21, 22, 23, and 24, which are the transmission sources of the activation notification information (step S107). Then, when the unique device information acquisition unit 115 receives the unique device information transmitted from the devices 21, 22, 23, and 24 (step S108), the unique device information acquisition unit 115 extracts the manufacturer identification information contained therein from the received unique device information and extracts the The manufacturer identification information obtained is stored in the connected device storage unit 131 (step S301).

After that, the determination unit 116 determines whether or not the manufacturer identification information stored in the attribute storage unit 132 matches the manufacturer identification information stored in the connected device storage unit 131 (step S302). Here, when the determination unit 116 determines that the manufacturer identification information stored in the attribute storage unit 132 and the manufacturer identification information stored in the connected device storage unit 131 match (step S302: Yes), as described in the first embodiment, The processes after step S111 in FIG. 11 are executed. On the other hand, when the determination unit 116 determines that the manufacturer identification information stored in the attribute storage unit 132 and the manufacturer identification information stored in the connected device storage unit 131 do not match (step S302: No), The processes after step S113 in FIG. 11 are executed.

According to this configuration, without extracting the model identification information corresponding to the devices 21, 22, 23, and 24 from the activation notification information received from the devices 21, 22, 23, and 24, the devices 21, 22, 23, and 24 Therefore, there is an advantage that the processing executed by the control device 1 is simplified and the processing load of the control device 1 is reduced.

In the embodiment, for example, as shown in FIG. A server 4009 having an assigned IP address storage unit for storing IP address information assigned to devices connected to the network may be connected to the wide area network NT1. In this case, the determination unit 116 of the control device 1 stores the combination of the model identification information, the manufacturer identification information, and the IP address information acquired from the server 4009, the model identification information, the manufacturer identification information, and the IP address information stored in the connected device storage unit 131. The connection status of the devices 21, 22, 23, and 24 connected to the local network NT2 may be determined based on the result of comparing the combination with the address information.

According to this configuration, it is possible to remotely change the model identification information, manufacturer identification information, and the like of devices that allow direct wired connection to the control device 1 .

In the embodiment, the terminal device 7, based on the determination result information received from the control device 1, for each device 21, 25, 23, 24 as shown in FIGS. An example of displaying a determination result screen showing a list of determination results on the display screen 705a of the display unit 705 has been described. However, the method by which the terminal device 7 displays the determination result information is not limited to this. For example, as shown in FIG. A pop-up screen for notifying the user may be displayed.

In the embodiment, the controller 1 detects the presence of the devices 21, 22, 23, and 24 connected to the local network NT2 by receiving activation notification information multicast-transmitted from the devices 21, 22, 23, and 24. An example of recognition has been described. However, the present invention is not limited to this. may In this case, the control device 1 recognizes the devices 21, 22, 23 and 24 connected to the local network NT2 based on the response information to the response request information.

In the control device 1 according to the embodiment, when a device 25 not permitted to be directly connected by wire to the control device 1 is connected to the control device 1, the device 25 is excluded from the control target by the control device 1. You may do so.

In the embodiment, an example in which the control device 1, the router 3 and the devices 21, 22, 23 and 24 are connected by wire has been described. , 24 may be wirelessly connected to each other. In this case, the control device 1 and the router 3 are based on identification information for distinguishing between the control device 1 and the router 3, such as SSIDs (Service Set Identifiers) set in the devices 21, 22, 23, and 24, respectively. , devices 21, 22, 23, and 24 may be given IP addresses.

Various functions of the control device 1 and the terminal device 7 according to the present invention may be implemented by software, firmware, or a combination of software and firmware. In this case, the software or firmware is written as a program, and the program is stored on computer-readable media such as flexible discs, CD-ROMs (Compact Disc Read Only Memory), DVDs (Digital Versatile Discs) and MOs (Magneto-Optical Discs). By storing and distributing the program in a recording medium, and reading and installing the program in the computer, a computer capable of realizing each function described above may be configured. When each function is shared between an OS (Operating System) and an application, or when the OS and an application cooperate with each other, only portions other than the OS may be stored in the recording medium.

Furthermore, it is also possible to superimpose each program on a carrier wave and distribute it via a communication network. For example, the program may be posted on a bulletin board (BBS, Bulletin Board System) on a communication network and distributed via the network. Then, these programs may be activated and executed in the same manner as other application programs under the control of the OS so that the above-described processing can be executed.

INDUSTRIAL APPLICATION This invention is suitable as a control apparatus of HEMS installed in the house.

1 control device 3 router 4 data line termination device 7 terminal device 21, 22, 23, 24, 25 device 101, 701 CPU, 102, 702 main storage unit, 103, 703 auxiliary storage unit, 104 wired communication Interface 105, 704 Wireless communication interface 109, 709 Bus 111 DHCP processing unit 112 Boot notification information receiving unit 113 IP address extracting unit 114 Model information extracting unit 115 Specific device information acquiring unit 116 Judging unit 117 determination result generation unit 118 determination result transmission unit 119 device information acquisition unit 131 connected device storage unit 132 attribute storage unit 133 assigned address storage unit 134, 731 determination result storage unit 705 display unit 705a display screen; 706 input unit, 711 determination result acquisition unit, 712 display control unit, 4009 server, NT1 wide area network, NT2 local network

Claims (8)

A control system for determining a connection state of a device connected to a network to which a control device that controls the device belongs,
a device information acquisition unit that acquires first device information specific to a device connected to the network;
a communication identification information acquisition unit that acquires first communication identification information assigned to a device connected to the network;
A combination of the second device information and the second communication identification information of the device that is allowed to be connected to the network, which is set in advance when the connection state of the device to the network is appropriate, and the first device information and a combination of the first communication identification information, a determination unit that determines the connection state of the device connected to the network based on the result of comparison;
a server connected to the network and having a device information storage unit that stores the second device information and a communication identification information storage unit that stores the second communication identification information;
The determination unit compares a combination of the second device information obtained from the server and the second communication identification information obtained from the server with a combination of the first device information and the first communication identification information. Determining the connection state of the device connected to the network based on the result of the
control system. When the first device information and the second device information match and the first communication identification information and the second communication identification information match, the determination unit determines whether the device is connected to the network. is appropriate, and if the first device information and the second device information do not match, or if the first communication identification information and the second communication identification information do not match, a connection to the network determining that the connection state of the device is inappropriate;
A control system according to claim 1 . A plurality of the first communication identification information exist,
further comprising a communication identification information assigning unit that assigns first communication identification information selected from the plurality of first communication identification information to each device directly connected to the control device;
3. Control system according to claim 1 or 2. a determination result generation unit that generates determination result information indicating a determination result by the determination unit;
A determination result transmission unit that transmits the determination result information to the terminal device,
A control system according to any one of claims 1 to 3. The first device information and the second device information are at least model identification information for identifying the model of the device, manufacturer identification information for identifying the manufacturer of the device, and device name information indicating the name of the device. including one
A control system according to any one of claims 1 to 4. a device information storage unit that stores the second device information;
A communication identification information storage unit that stores the second communication identification information,
The determination unit stores a combination of the second device information stored in the device information storage unit and the second communication identification information stored in the communication identification information storage unit, and the first device information and the first communication identification information. Determining the connection state of the device connected to the network based on the result of comparing the combination of
A control system according to any one of claims 1 to 5. a step in which the control system acquires first device information unique to the device connected to a network to which a control device that controls the device belongs;
a step in which the control system acquires first communication identification information assigned to a device connected to the network;
Obtained from a server in which the control system is connected to the network and has a device information storage unit that stores second device information of the device and a communication identification information storage unit that stores second communication identification information of the device a combination of the second device information and the second communication identification information, wherein the device is allowed to be connected to the preset network when the connection state of the device to the network is appropriate; A connection state of a device connected to the network based on a result of comparing a combination of the second device information and the second communication identification information with a combination of the first device information and the first communication identification information. and
Connection status determination method. the computer,
a device information acquisition unit that acquires first device information unique to a device connected to a network to which a control device that controls the device belongs;
a communication identification information acquisition unit that acquires first communication identification information assigned to a device connected to the network;
A combination of second device information and second communication identification information, which is preset to allow connection to the network when the connection state of the device to the network is appropriate, and the first device information and the first device information. 1. A determination unit that determines the connection state of the device connected to the network based on the result of comparing the combination with the communication identification information;
A program for functioning as
The determination unit is connected to the network and acquires the second device from a server having a device information storage unit that stores the second device information and a communication identification information storage unit that stores the second communication identification information. A device connected to the network based on a result of comparing a combination of the device information and the second communication identification information acquired from the server with a combination of the first device information and the first communication identification information. determine the connection status of
program.

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