WO2023181339A1 - 通信システム、通信制御装置、サーバ、通信制御方法およびプログラム - Google Patents

通信システム、通信制御装置、サーバ、通信制御方法およびプログラム Download PDF

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Publication number
WO2023181339A1
WO2023181339A1 PCT/JP2022/014300 JP2022014300W WO2023181339A1 WO 2023181339 A1 WO2023181339 A1 WO 2023181339A1 JP 2022014300 W JP2022014300 W JP 2022014300W WO 2023181339 A1 WO2023181339 A1 WO 2023181339A1
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WIPO (PCT)
Prior art keywords
information
communication control
message
identification information
filter
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Ceased
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PCT/JP2022/014300
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English (en)
French (fr)
Japanese (ja)
Inventor
貴光 山田
隆佳 外村
健太郎 澤
利康 樋熊
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Mitsubishi Electric Corp
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Mitsubishi Electric Corp
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Publication date
Application filed by Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to PCT/JP2022/014300 priority Critical patent/WO2023181339A1/ja
Priority to JP2023504866A priority patent/JP7325682B1/ja
Priority to US18/837,921 priority patent/US20250158949A1/en
Priority to CN202280093884.2A priority patent/CN118901230A/zh
Publication of WO2023181339A1 publication Critical patent/WO2023181339A1/ja
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L51/00—User-to-user messaging in packet-switching networks, transmitted according to store-and-forward or real-time protocols, e.g. e-mail
    • H04L51/21—Monitoring or handling of messages
    • H04L51/212—Monitoring or handling of messages using filtering or selective blocking
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
    • H04L12/2803—Home automation networks

Definitions

  • the present disclosure relates to a communication system, a communication control device, a server, a communication control method, and a program.
  • a home device control and monitoring system has been proposed that includes a communication adapter connected to home devices and a controller that communicates with the communication adapter (see, for example, Patent Document 1).
  • the controller manages a correspondence table containing information indicating the connection relationship between the communication adapter and the home equipment, and receives a startup notification sent from the communication adapter when the communication adapter is started. , requests the communication adapter for identification information of the home equipment connected to the communication adapter, and updates the above-mentioned correspondence table based on the identification information received from the communication adapter in response to the request.
  • a communication adapter is connected to a local network, and a controller controls the home equipment via a gateway device connected to the local network and a wide area network.
  • a gateway device connected to the local network and a wide area network.
  • the present disclosure has been made in view of the above reasons, and aims to provide a communication system, a communication control device, a server, a communication control method, and a program that can reduce network communication traffic.
  • server and A device is connected to a local network to which a device is connected and is connected to the server via a wide area network, and transmits a device message generated by the device and acquired via the local network to the server via the wide area network.
  • Each of the plurality of communication control devices includes: a filter storage unit that stores filter information for filtering the device message to be transmitted to the server based on device identification information that identifies the device that is the source of the device message; a filter update unit that updates the filter information based on filter update request information that requests update of the filter information transmitted from the server; a message acquisition unit that acquires a device message transmitted from the device; a transmission determination unit that determines whether or not to transmit the device message to the server based on the filter information;
  • the server is a device information storage unit that stores the device identification information and device identification information that identifies the communication control device in association with each other;
  • the device information storage unit stores the device message including the device identification information transmitted from any one of the plurality of communication control devices and the device identification information of the communication control device that is the source of the device message.
  • a combination determination unit that determines whether or not the combination of is already stored; associating the first device identification information constituting the combination that is determined not to be stored in the device information storage unit with the device identification information of the transmission source of the first device message including the first device identification information; a device information update unit that newly stores the device information in the device information storage unit; the filter update request information requesting an update to the filter information for filtering the second device message including the second device identification information constituting the combination determined to be already stored in the device information storage unit; and a filter update request unit that transmits the second device message to the communication control device that is the source of the second device message.
  • the present disclosure since a device message sent from a device is sent to the server via only one of the plurality of communication control devices, the same device message is sent from the plurality of communication control devices to the wide area network. Since the outflow to the network is suppressed, the amount of communication on the wide area network can be reduced accordingly.
  • Schematic configuration diagram of a communication system according to an embodiment of the present disclosure Block diagram showing the hardware configuration of a communication system according to an embodiment
  • Block diagram showing the functional configuration of a communication system according to an embodiment A diagram showing an example of information stored in the device information storage unit of the cloud server according to the embodiment.
  • the communication system according to the present embodiment is connected to a server and a local network to which devices are connected, and is also connected to the server via a wide area network, and transmits device messages generated by the devices and acquired via the local network over a wide area.
  • a plurality of communication control devices that transmit data to a server via a network are provided.
  • Each of the plurality of communication control devices includes a filter storage unit that stores filter information for filtering a device message to be transmitted to the server based on device identification information that identifies the device that is the source of the device message; A filter update unit that updates filter information based on filter update request information that requests updating of transmitted filter information; a message acquisition unit that acquires a device message transmitted from a device; and a transmission determination unit that determines whether or not to transmit the information to the server.
  • the server also includes a device information storage section that stores device identification information and device identification information that identifies the communication control device in association with each other, and a device information storage section that stores device identification information and device identification information that identifies the communication control device.
  • a combination determination unit that determines whether or not a combination of a transmitted equipment message including the equipment identification information and device identification information of a communication control device that is a source of the equipment message is already stored; and a device information storage unit that stores the combination.
  • device information that causes the first device identification information constituting the combination that is determined not to be the first device identification information to be newly stored in the device information storage unit in association with the device identification information of the transmission source of the first device message including the first device identification information; filter update request information requesting an update to filter information for filtering a second device message including second device identification information constituting a combination determined to be already stored in the update unit and the device information storage unit; and a filter update request unit that transmits the second device message to the communication control device that is the source of the second device message.
  • the communication system includes a cloud server 2, a device 3 installed in a residence, and communication control for transmitting a device message generated by the device 3 to the cloud server 2. It includes devices 1A and 1B.
  • the device 3 and the communication control devices 1A and 1B can communicate via a local network NW2 such as a wireless LAN (Local Area Network).
  • the cloud server 2 is capable of communicating via a wide area network NW1 such as the Internet and a broadband router (hereinafter referred to as "BBR") 8.
  • the device 3 is, for example, an air conditioner including a wireless module, and communicates with the BBR 8 and the communication control devices 1A and 1B via the local network NW2.
  • the device 3 is, for example, an air conditioner equipped with a wireless module, and communicates with the communication control devices 1A and 1B via the local network NW2 using communication middleware such as ECHONETLite (registered trademark).
  • ECHONETLite registered trademark
  • the device 3 acquires device state request information that requests transmission of device state information indicating the state of the device itself transmitted from the communication control devices 1A and 1B to the cloud server 2, the device 3 receives the state indicating the state of the device 3.
  • Device status information including parameter information is generated and transmitted to the communication control devices 1A and 1B.
  • the device 3 when the device 3 is connected to the local network NW2 for the first time, it generates network participation notification information to notify that it has been connected to the local network NW2, and sends it to the communication control devices 1A and 1B.
  • the network participation notification information includes, for example, MAC address information and IP address information of the device 3, and corresponds to, for example, instance list notification information in the ECHONET Lite (registered trademark) standard. Furthermore, the device 3 operates based on control information transmitted from the communication control devices 1A and 1B.
  • the communication control devices 1A and 1B each transmit the device message generated by the device 3 to the cloud server 2 via the wide area network NW1.
  • the communication control devices 1A and 1B include a CPU (Central Processing Unit) 101, a main storage section 102, an auxiliary storage section 103, a communication section 106, and a bus 109 that connects each section. Be prepared.
  • the main storage unit 102 is a volatile memory such as RAM (Random Access Memory), and is used as a work area for the CPU 101.
  • the auxiliary storage unit 103 includes a nonvolatile memory such as a semiconductor memory, functions as a ROM (Read Only Memory), and stores programs for realizing various functions of the communication control devices 1A and 1B.
  • the communication unit 106 includes, for example, a wireless module, and performs wireless communication with the device 3 and the BBR 8.
  • the CPU 101 reads the program stored in the auxiliary storage unit 103 into the main storage unit 102 and executes the program, so that the message acquisition unit 111, the transmission determination unit 112, and the transmission It functions as a control unit 113, an encapsulated message acquisition unit 114, a message transmission unit 115, and a filter update unit 116.
  • the auxiliary storage section 103 shown in FIG. 2 includes a filter storage section 131, as shown in FIG.
  • the filter storage unit 131 stores filter information for filtering the device message to be sent to the cloud server 2 based on address information indicating the address given to the device 3 that is the source of the device message sent from the device 3. do.
  • the filter information includes IP address information indicating the IP address of the device 3 that is the source of the device message to be discarded without transmitting it to the cloud server 2, identification number information indicating an identification number unique to the device 3, including.
  • the message acquisition unit 111 acquires the device message transmitted from the device 3, and notifies the transmission determination unit 112 of the acquired device message and the IP address information of the source of the device message.
  • This device message includes network participation notification information, which is a device message for notifying that the device 3 has been newly connected to the local network NW2, and device identification information, which will be described later, including identification number information that identifies the device 3 in the application layer. This is the device identification information response information corresponding to the request information, or the device status information described above.
  • the network participation notification information is, for example, an instance list notification message that is multicast-transmitted from the device 3 when the device 3 of the node is newly activated in the communication protocol of the ECHONET Lite (registered trademark) standard.
  • the identification number information is, for example, a 16-byte identification number uniquely assigned to each device 3 in the ECHONET Lite (registered trademark) standard.
  • the transmission determination unit 112 determines whether the device message notified from the message acquisition unit 111 is subject to filtering. Specifically, the transmission determination unit 112 determines whether the IP address indicated by the IP address information notified together with the device message from the message acquisition unit 111 is included in the IP address indicated by the filter information stored in the filter storage unit 131. Determine. Then, if the IP address indicated by the IP address information notified together with the device message from the message acquisition unit 111 is included in the IP address indicated by the filter information, the transmission determination unit 112 determines the notified device message to be filtered. . Then, the transmission determination unit 112 notifies the transmission control unit 113 of determination result information indicating the determination result together with the device message.
  • the transmission control unit 113 controls the transmission of the device message to the cloud server 2.
  • the transmission control unit 113 transmits to the cloud server 2 the device message determined by the transmission determination unit 112 to be not subject to filtering.
  • the transmission control unit 113 discards the device message determined by the transmission determination unit 112 to be a filtering target in order to avoid transmitting the device message to the cloud server.
  • the transmission control unit 113 adds the MAC address information of the communication control devices 1A and 1B to the device message, encapsulates it, adds header information for specifying the cloud server 2 as the transmission destination, and then adds the MAC address information of the communication control devices 1A and 1B to the device message.
  • the header information includes, for example, domain name information of the cloud server 2.
  • the encapsulated message acquisition unit 114 When the encapsulated message acquisition unit 114 acquires various information whose transmission destination is the communication control devices 1A and 1B from the cloud server 2, the encapsulated message acquisition unit 114 removes the header information from the acquired information and then decapsulates it. Information including MAC address information and MAC address information of communication control devices 1A and 1B is extracted.
  • the various information includes device identification information request information that requests the device 3 to send device identification information response information including the above-mentioned identification number information, and device status information that indicates the status of the device 3 to the device 3. includes device status request information requesting transmission of the device 3 and control information for controlling the device 3.
  • the encapsulated message acquisition unit 114 notifies the message transmission unit 115 of the extracted various information.
  • the message transmitting section 115 transmits various kinds of information to the device 3 based on the MAC address information of the device 3 included in the various information notified from the encapsulated message obtaining section 114.
  • the filter update unit 116 updates the filter information stored in the filter storage unit 131 based on filter update request information sent from the cloud server 2 that requests update of filter information.
  • the cloud server 2 includes a CPU 201, a main storage section 202, an auxiliary storage section 203, a communication section 206, a timekeeping section 207, and a bus 209 that connects each section.
  • CPU 201 is, for example, a multi-core processor.
  • the main storage unit 202 is a volatile memory and is used as a work area for the CPU 201.
  • the auxiliary storage unit 203 has a nonvolatile memory, functions as a ROM and storage, and stores programs for realizing various functions of the cloud server 2.
  • Communication unit 206 communicates with communication control devices 1A and 1B via wide area network NW1 and BBR8.
  • the timer unit 207 is, for example, a software timer, and measures the elapsed time after the above-mentioned device status information acquisition time has arrived.
  • the CPU 201 loads the program stored in the auxiliary storage unit 203 into the main storage unit 202 and executes the program, so that the encapsulated message acquisition unit 211, the message type determination unit 212, and the combination, as shown in FIG. It functions as a determination section 213, a device information update section 214, a device identification information request section 215, a status acquisition section 216, a control information generation section 217, a transmission control section 219, and a filter update request section 220.
  • the auxiliary storage section 203 shown in FIG. 2 includes a device information storage section 231 and a state storage section 232, as shown in FIG. 3.
  • the device information storage unit 231 stores at least a combination of identification number information, MAC address information, and IP address information that identifies the device 3 in the application layer in association with device identification information that identifies the communication control devices 1A and 1B. .
  • the identification number information, MAC address information, and IP address information each correspond to device identification information that identifies the device 3.
  • the device information storage unit 231 stores the MAC address information and IP address information of the device 3 belonging to the local network NW2 in each of the plurality of communication control devices 1A and 1B connected to the local network NW2. It is stored in association with MAC address information, which is identification information.
  • the device information storage unit 231 stores a combination of model information indicating the type of the device 3 and the above-mentioned identification number information for each MAC address information of the communication control devices 1A and 1B. It is stored in association with the combination of In the example shown in FIG. 4, local network NW2 indicated by subnet information "192.168.32.0/24" has MAC addresses "AA-BB-CC-DD-EE-F1" and "AA-BB-CC". -DD-EE-F2'' indicates that two communication control devices 1A and 1B are connected.
  • the device information storage unit 231 corresponds the combination of IP address information, MAC address information, model information, and identification number information of each of the plurality of devices 3 to the device identification information of any one of the communication control devices 1A and 1B. I remember it attached.
  • the status storage unit 232 stores device status information indicating the status of the device 3 in association with the MAC address information and IP address information of the device 3.
  • the encapsulated message acquisition unit 211 When the encapsulated message acquisition unit 211 acquires various information transmitted from the communication control devices 1A and 1B, the encapsulated message acquisition unit 211 decapsulates the acquired various information and releases the header information to obtain the MAC address information and IP address information of the device 3. Extract the device message containing. Then, the encapsulated message acquisition unit 211 notifies the message type determination unit 212 of the extracted device message.
  • the message type determination unit 212 determines whether the device message notified from the encapsulated message acquisition unit 211 is the aforementioned network participation notification information, device identification information response information, or device status information. Here, if the message type determining unit 212 determines that the device message is network participation notification information, it notifies the device identification information requesting unit 215 of the network participation notification information. Furthermore, when the message type determination unit 212 determines that the device message notified from the encapsulated message acquisition unit 211 is the device identification information response information described above, it notifies the combination determination unit 213 of the device identification information response information. Furthermore, when the message type determination unit 212 determines that the device message is device status information, it notifies the status acquisition unit 216 of the device status information.
  • the combination determination unit 213 stores the IP address information of the device 3 included in the device identification information response information transmitted from the communication control devices 1A and 1B by the device information storage unit 231 and the communication control device 1A as the source of the device identification information response information. , 1B is already stored.
  • the combination determination unit 213 determines that the combination of the IP address information of the device 3 and the MAC address information of the communication control devices 1A and 1B that are the transmission sources of the device identification information response information is not already stored in the device information storage unit 231.
  • the combination determining unit 213 notifies the device information updating unit 214 of determination result information indicating the determination result.
  • the device information update section 214 updates the IP address information of the device 3 that is determined not to be stored in the device information storage section 231 and the communication control devices 1A and 1B based on the determination result information notified from the combination determination section 213.
  • the IP address information constituting the combination with the MAC address information is newly stored in the device information storage unit 231 in association with the MAC address information of the communication control devices 1A and 1B that are the sender of the device message including the IP address information. .
  • the device information update section 214 associates the MAC address information and identification number information of the device 3, which are included together with the IP address information in the device identification information response information notified to the combination determination section 213, with the IP address information, and updates the device with the IP address information.
  • the information is stored in the information storage unit 231.
  • the device identification information request unit 215 When the device identification information request unit 215 is notified of the network participation notification information from the message type determination unit 212, the device identification information request unit 215 generates device identification information request information that requests the device 3 to transmit device identification information response information. The device identification information request information is notified to the transmission control unit 219.
  • the status acquisition unit 216 acquires the device status information transmitted from the device 3 by transmitting to the device 3 device status request information that requests the device 3 to transmit the device status information. Specifically, the status acquisition unit 216 generates device status request information every time a preset device status acquisition time arrives, and notifies the transmission control unit 219 of the generated device status request information. When the status acquisition unit 216 is notified of the device status information from the message type determination unit 212, the status acquisition unit 216 updates the device status information stored in the status storage unit 232 using the notified device status information.
  • the control information generation unit 217 refers to the device status information stored in the status storage unit 232 and determines whether a control event that requires a change in the control content of the device 3 has occurred based on the status of the device 3 indicated by the device status information. Determine whether or not.
  • the control information generation unit 217 determines that a control event has occurred, it generates control information for changing the control details of the device 3, and notifies the transmission control unit 219 of the generated control information.
  • the transmission control unit 219 When the transmission control unit 219 is notified of various information from the device identification information request unit 215, the status acquisition unit 216, and the control information generation unit 217, the transmission control unit 219 transmits the transmission destination communication control devices 1A, 1B according to the various types of information notified. Identify.
  • the transmission control unit 219 stores MAC address information of the communication control devices 1A and 1B that is associated with the combination of MAC address information and IP address information of the device 3 that is the destination of the control information stored in the device information storage unit 231. and identify IP address information. Then, the transmission control unit 219 encapsulates the notified various information and adds header information for designating the identified communication control devices 1A and 1B as the transmission destination.
  • the header information includes IP address information and MAC address information of the identified communication control devices 1A and 1B.
  • the filter update requesting unit 220 updates the IP address information of the device 3 determined to be already stored in the device information storage unit 231 and the communication control devices 1A, 1B.
  • Filter update request information requesting an update to filter information for filtering a device message that includes IP address information that forms a combination with MAC address information is sent to the communication control devices 1A and 1B that are the senders of the device identification information response information. Send.
  • processing for establishing a connection has already been executed between the communication control devices 1A, 1B and the cloud server 2, and the communication control devices 1A, 1B and the cloud server 2 have mutual IP address information. It is assumed that . Also, a case will be described in which two communication control devices 1A and 1B are connected to the local network NW2.
  • FIG. 5 assume that the user newly connects the device 3 to the local network NW2 and starts it up. In this case, network participation notification information notifying that the device 3 is newly connected to the local network NW2 is transmitted from the device 3 to the communication control device 1A (step S1).
  • the communication control device 1A determines that the acquired network participation notification information is not subject to filtering because the filter information stored in the filter storage unit 131 does not include the IP address information of the device 3. Determination is made (step S2). Next, the communication control device 1A executes an encapsulation process of adding the MAC address information of the communication control device 1A to the network participation notification information and adding header information for specifying the cloud server 2 as the transmission destination (step S3). Subsequently, the encapsulated network participation notification information is transmitted from the communication control device 1A to the cloud server 2 (step S4).
  • the cloud server 2 upon acquiring the network participation notification information transmitted from the communication control device 1A, the cloud server 2 performs a decapsulation process to remove header information for specifying the cloud server 2 as the destination from the acquired network participation notification information. is executed (step S5), and the MAC address information and IP address information of the device 3 and the MAC address information of the communication control device 1A are extracted (step S6). Thereafter, since the device information storage section 231 has not yet stored the IP address information of the device 3 in association with the device identification information of the communication control device 1A, the cloud server 2 stores the IP address information stored in the device information storage section 231.
  • step S7 It is determined that there is no combination of the extracted IP address information of the device 3 and the device identification information of the communication control device 1A among the combinations of the device identification information and the device identification information (step S7).
  • the cloud server 2 generates device identification information request information including the extracted MAC address information and IP address information of the device 3 (step S8).
  • the aforementioned network participation notification information is also transmitted from the device 3 to the communication control device 1B (step S9).
  • the communication control device 1B determines that the acquired network participation notification information is not subject to filtering because the filter information stored in the filter storage unit 131 does not include the IP address information of the device 3. Determination is made (step S10).
  • the communication control device 1B adds the MAC address information of the communication control device 1B to the network participation notification information, and also adds header information for specifying the cloud server 2 as the destination. Encapsulation processing is executed (step S11).
  • the cloud server 2 performs a decapsulation process to remove header information for specifying the cloud server 2 as the destination from the acquired network participation notification information. (Step S13). Then, the cloud server 2 extracts the MAC address information and IP address information of the device 3 and the MAC address information of the communication control device 1B (step S14). Next, since the device information storage section 231 has not yet stored the IP address information of the device 3 in association with the device identification information of the communication control device 1B, the cloud server 2 uses the IP address stored in the device information storage section 231.
  • the cloud server 2 It is determined that among the combinations of information and device identification information, there is no combination of the extracted IP address information of the device 3 and the device identification information of the communication control device 1B (step S15).
  • the cloud server 2 generates device identification information request information including the extracted MAC address information and IP address information of the device 3 (step S16).
  • the cloud server 2 adds header information to the generated device identification information request information to specify the communication control device 1A, which is the source of the network participation notification information, as the destination.
  • the conversion process is executed (step S17).
  • the encapsulated device identification information request information is transmitted from the cloud server 2 to the communication control device 1A (step S18).
  • the communication control device 1A cancels the header information for specifying the aforementioned communication control device 1A as the transmission destination from the acquired device identification information request information.
  • a decapsulation process is executed (step S19).
  • the device identification information request information is transmitted from the communication control device 1A to the device 3 based on the MAC address information and IP address information of the device 3 included therein (step S20).
  • the device 3 upon acquiring the device identification information request information, the device 3 generates device identification information response information including its own identification number information in response to the device identification information request information (step S21). Next, the generated device identification information response information is transmitted from the device 3 to the communication control device 1A (step S22). On the other hand, upon acquiring the device identification information response information, the communication control device 1A executes the same encapsulation process as in step S3 described above (step S23). Subsequently, the encapsulated device identification information response information is transmitted from the communication control device 1A to the cloud server 2 (step S24).
  • the cloud server 2 upon acquiring the device identification information response information transmitted from the communication control device 1A, the cloud server 2 executes the above-described decapsulation process on the acquired device identification information response information (step S25).
  • the cloud server 2 transmits the combination of the identification number information included in the device identification information response information and the IP address information and MAC address information given to the device 3 that is the source of the device identification information response information to the communication control device 1A.
  • the device information storage unit 231 does not store the device identification information in association with the device identification information (step S26).
  • the cloud server 2 communicates the combination of the identification number information included in the acquired device identification information response information and the IP address information and MAC address information given to the device 3 that is the source of the device identification information response information. It is stored in the device information storage unit 231 in association with the device identification information of the control device 1A (step S27).
  • the cloud server 2 also performs an encapsulation process to add header information for specifying the communication control device 1B, which is the source of the network participation notification information, as the destination to the generated device identification information request information (step S28). ). Thereafter, the encapsulated device identification information request information is transmitted from the cloud server 2 to the communication control device 1B (step S29). On the other hand, upon acquiring the device identification information request information transmitted from the cloud server 2, the communication control device 1B cancels the header information for specifying the aforementioned communication control device 1B as the transmission destination from the acquired device identification information request information. A decapsulation process is executed (step S30). Then, the device identification information request information is transmitted from the communication control device 1B to the device 3 based on the MAC address information and IP address information of the device 3 included therein (step S31).
  • the device 3 upon acquiring the device identification information request information, the device 3 generates device identification information response information including its own identification number information and model information in response to the device identification information request information (step S32). .
  • the generated device identification information response information is transmitted from the device 3 to the communication control device 1B (step S33).
  • the communication control device 1B upon acquiring the device identification information response information, the communication control device 1B executes the same encapsulation process as in step S11 described above (step S34). Subsequently, the encapsulated device identification information response information is transmitted from the communication control device 1B to the cloud server 2 (step S35).
  • the cloud server 2 executes the above-described decapsulation process on the acquired device identification information response information (step S36).
  • the cloud server 2 communicates the combination of the identification number information and model information included in the device identification information response information and the IP address information and MAC address information given to the device 3 that is the source of the device identification information response information. Assume that it is determined that the device information storage unit 231 has already stored the device identification information in association with the device identification information of the control device 1A (step S37).
  • the cloud server 2 generates filter update request information including the IP address information given to the device 3 that is the source of the device identification information response information included in the acquired device identification information response information (step S38). Thereafter, the generated filter update request information is transmitted from the cloud server 2 to the communication control device 1B that is the source of the device identification information response information (step S39). On the other hand, upon acquiring the filter update request information, the communication control device 1B updates the filter information stored in the filter storage unit 131 by adding the IP address information included in the acquired filter update request information (step S40).
  • the cloud server 2 generates device status request information that requests the device 3 to transmit device status information (step S41).
  • the cloud server 2 refers to the device identification information associated with the IP address information of the device 3 to which the device status request information is to be transmitted, which is stored in the device information storage unit 231, and determines the destination of the device status request information.
  • the communication control device for example, communication control device 1A
  • the cloud server 2 executes an encapsulation process of adding header information for designating the identified communication control device 1A as a transmission destination to the device state request information (step S42).
  • the encapsulated device status request information is transmitted from the cloud server 2 to the communication control device 1A (step S43).
  • the communication control device 1A acquires the device status request information transmitted from the cloud server 2
  • the communication control device 1A removes the header information for specifying the communication control device 1A as the transmission destination from the acquired device status request information.
  • Encapsulation processing is executed (step S44).
  • the device status information request information is transmitted from the communication control device 1A to the device 3 based on the MAC address information and IP address information of the device 3 included therein (step S45).
  • the device 3 upon acquiring the device state request information, the device 3 generates device state information indicating the state of the device itself in response to the device state request information (step S46). Next, the generated device status information is transmitted from the device 3 to the communication control device 1A (step S47).
  • the communication control device 1A refers to the IP address information included in the acquired device status information and determines that the device status information is not subject to filtering (step S48). In this case, the communication control device 1A performs an encapsulation process that adds the MAC address information of the communication control device 1A to the acquired device status information and adds header information for specifying the cloud server 2 as the destination. (Step S49).
  • the encapsulated device status information is transmitted from the communication control device 1A to the cloud server 2 (step S50).
  • the cloud server 2 upon acquiring the device status information transmitted from the communication control device 1A, the cloud server 2 executes the above-described decapsulation process on the acquired device status information (step S51). Thereafter, the cloud server 2 uses the device status information to update the device status information stored in the status storage unit 232 (step S52).
  • the generated device status information is transmitted from the device 3 to the communication control device 1B (step S53), and the communication control device 1B refers to the IP address information included in the acquired device status information to obtain the device status information. Assume that it is determined that the filtering target is to be filtered (step S54). In this case, the communication control device 1B discards the acquired device status information (step S55) and avoids transmitting it to the cloud server 2.
  • the cloud server 2 when the aforementioned control event occurs, the cloud server 2 generates control information for changing the control details of the device 3 (step S56).
  • the cloud server 2 refers to the device identification information associated with the IP address information of the device 3 to which the device status request information is to be transmitted, which is stored in the device information storage unit 231, and determines whether the control information is to be transmitted. Identify the control device (for example, communication control device 1A).
  • the cloud server 2 executes an encapsulation process of adding header information for designating the identified communication control device 1A as a transmission destination to the device state request information (step S57). Subsequently, the encapsulated control information is transmitted from the cloud server 2 to the communication control device 1A (step S58).
  • the communication control device 1A acquires the control information transmitted from the cloud server 2
  • the communication control device 1A performs a decapsulation process to remove the header information for specifying the aforementioned communication control device 1A as the transmission destination from the acquired control information. Execute (step S59).
  • the control information is then transmitted from the communication control device 1A to the device 3 based on the MAC address information and IP address information of the device 3 included therein (step S60).
  • the device 3 upon acquiring the control information, the device 3 operates based on the acquired control information (step S61).
  • the network participation notification information is sent again from the device 3 to the communication control device 1A (step S62).
  • the communication control device 1A acquires the network participation notification information, since the IP address information of the device 3 included in the filter information stored in the filter storage unit 131 has been changed, It is determined that the information is not subject to filtering (step S63).
  • the cloud server 2 stores the identification number information of the device 3 stored in the device information storage unit 231 and the IP address information assigned to the device 3. Filter update request information indicating the combination of is generated (step S38).
  • the generated filter update request information is transmitted from the cloud server 2 to the communication control device 1B that is the source of the device identification information response information (step S39).
  • the communication control device 1B acquires the filter update request information
  • the communication control device 1B updates the filter information stored in the filter storage unit 131 based on the combination of the identification number information and IP address information included in the acquired filter update request information. (Step S40).
  • step S101 determines whether network participation notification information or device status information transmitted from the device 3 has been acquired. If the message acquisition unit 111 determines that network participation information and device status information have not been acquired (step S101: No), the process of step S105, which will be described later, is executed.
  • step S101: Yes the message acquisition unit 111 transmits the acquired network participation notification information or device status information to the transmission determination unit 112. to notify.
  • the transmission determining unit 112 determines whether the network participation notification information or the device status information is subject to the above-mentioned filtering (step S102).
  • the transmission control unit 113 discards the network participation notification information or device status information ( Step S103) and step S105, which will be described later, are executed.
  • the transmission control unit 113 adds the network participation notification information or the device status information to the communication control device 1A. , 1B, and then performs encapsulation processing to add header information for specifying the cloud server 2 as the transmission destination, and then transmits it to the cloud server 2 (step S104).
  • the message acquisition unit 111 determines whether the information transmitted from the device 3 is device identification information response information (step S105). If the message acquisition unit 111 determines that the information is not device identification information response information (step S105: No), the process of step S107, which will be described later, is executed. On the other hand, if the message acquisition unit 111 determines that the message is device identification information response information (step S105: Yes), the transmission control unit 113 adds the MAC address information of the communication control devices 1A and 1B to the device identification information response information. After that, an encapsulation process is performed to add header information for specifying the cloud server 2 as the transmission destination, and then the data is transmitted to the cloud server 2 (step S106).
  • the encapsulated message acquisition unit 114 determines whether or not the encapsulated device identification information request information, device status request information, or control information whose transmission destination is the communication control devices 1A and 1B has been acquired from the cloud server 2. Determination is made (step S107). If the encapsulated message acquisition unit 114 determines that it has not acquired any of the device identification information request information, device status request information, and control information transmitted from the cloud server 2 (step S107: No), step S109 described below is performed. Processing is executed.
  • the encapsulated message acquisition unit 114 determines that it has acquired the device identification information request information, device status request information, or control information transmitted from the cloud server 2 (step S107: Yes)
  • the encapsulated message acquisition unit 114 receives the acquired device identification information request information. , notifies the message transmitter 115 of device status request information or control information. Then, the message transmitting section 115 releases the header information for specifying the communication control devices 1A and 1B as the transmission destination from the device identification information request information, device status request information, or control information notified from the encapsulated message obtaining section 114. After performing decapsulation processing, the data is transmitted to the device 3 (step S108).
  • the filter update unit 116 determines whether filter update request information has been acquired from the cloud server 2 (step S109). If the filter update unit 116 determines that the filter update request information has not been acquired (step S109: No), the process of step S101 is executed again. On the other hand, if the filter update unit 116 determines that the filter update request information has been acquired (step S109: Yes), the filter storage unit 131 stores the filter update request information based on the IP address information and identification number information included in the acquired filter update request information. The filter information to be used is updated (step S110). Subsequently, the process of step S101 is executed again.
  • step S201 determines whether information transmitted from the communication control devices 1A and 1B has been acquired.
  • step S201: No determines whether the information transmitted from the communication control devices 1A and 1B has not been acquired.
  • the encapsulated message acquisition unit 211 determines that the information transmitted from the communication control devices 1A and 1B has been acquired (step S201: Yes)
  • the encapsulated message acquisition unit 211 generates a header for specifying the cloud server 2 as the transmission destination from the acquired information.
  • a decapsulation process for releasing information is executed (step S202).
  • the message type determination unit 212 determines whether the information from which the header information has been removed is network participation notification information (step S203).
  • the message type determination unit 212 determines that the information with the header information removed is network participation notification information (step S203: Yes), it extracts the MAC address information and IP address information of the device 3 from the network participation notification information.
  • the MAC address information of the communication control devices 1A and 1B is extracted (step S204).
  • the combination determination unit 213 adds the extracted IP address information of the device 3 to the device identification information of the communication control devices 1A and 1B in the combination of IP address information and device identification information stored in the device information storage unit 231. It is determined whether there is a combination with (step S205).
  • step S205 determines that the device information storage unit 231 has stored a combination of the extracted IP address information of the device 3 and the device identification information of the communication control devices 1A and 1B (step S205: Yes) ).
  • the process of step S214 is executed.
  • the combination determination unit 213 adds the extracted IP address information of the device 3 to the device identification information of the communication control devices 1A and 1B in the combination of IP address information and device identification information stored in the device information storage unit 231.
  • step S205 No
  • the device identification information requesting unit 215 generates device identification information request information including the extracted MAC address information and IP address information of the device 3 (step S206).
  • the transmission control unit 219 executed an encapsulation process to add header information for specifying the communication control devices 1A and 1B, which are the transmission sources of the network participation notification information, as transmission destinations to the generated device identification information request information. Thereafter, the encapsulated device identification information request information is transmitted to the communication control devices 1A and 1B (step S207). Then, the process of step S214, which will be described later, is executed.
  • step S203 determines whether the device message from which header information has been removed is device identification information response information or not. It is determined whether or not (step S208).
  • step S208 it is assumed that the message type determination unit 212 determines that the device message with header information removed is device identification information response information (step S208: Yes).
  • the combination determination unit 213 has already communicated the combination of the identification number information included in the device identification information response information and the IP address information and MAC address information given to the device 3 that is the source of the device identification information response information.
  • step S209 It is determined whether the device information storage unit 231 stores the information in association with the device identification information of the control devices 1A and 1B (step S209).
  • the combination determination unit 213 determines that the device information storage unit 231 has not yet stored the combination of the above-described identification number information, IP address information, and MAC address information (step S209: No).
  • the device information update unit 214 updates the identification number information and model information included in the acquired device identification information response information with the IP address information and MAC address information assigned to the device 3 that is the source of the device identification information response information.
  • the combination is stored in the device information storage unit 231 in association with the device identification information of the communication control devices 1A and 1B (step S210). Then, the process of step S214 is executed.
  • step S209 determines that the device information storage unit 231 has already stored the combination of the above-mentioned identification number information, IP address information, and MAC address information (step S209: Yes).
  • the filter update request unit 220 generates filter update request information that includes IP address information given to the device 3 that is the source of the device identification information response information included in the acquired device identification information response information, and The filter update request information is transmitted to the communication control devices 1A and 1B that are the transmission sources of the device identification information response information (step S211). Then, the process of step S214 is executed.
  • step S212 determines whether the device message from which header information has been removed is device status information.
  • step S212 determines that the information with the header information removed is not device status information.
  • step S212: Yes the process of step S214, which will be described later, is executed.
  • step S212: Yes the message type determination unit 212 determines that the information with the header information removed is device status information.
  • the status acquisition unit 216 updates the device status information of the device 3 stored in the status storage unit 232 using the device status information notified from the message type determination unit 212 (step S213).
  • the control information generation unit 217 refers to the equipment status information stored in the status storage unit 232, and determines the control content of the equipment 3 based on the status of the equipment 3 indicated by the equipment status information. It is determined whether a control event requiring change has occurred (step S214). Here, if the control information generation unit 217 determines that a control event has not occurred (step S214: No), the process of step S218, which will be described later, is executed. On the other hand, if the control information generation unit 217 determines that a control event has occurred (step S214: Yes), it generates control information for changing the control details of the device 3 (step S215).
  • the transmission control unit 219 refers to the device identification information associated with the IP address information of the device 3 to which the device status request information is to be transmitted, which is stored in the device information storage unit 231, and determines the destination of the control information.
  • the communication control devices 1A and 1B are identified (step S216).
  • the transmission control unit 219 executes an encapsulation process that adds header information to the control information to designate the identified communication control devices 1A and 1B as the transmission destination, and sends the encapsulated control information to the communication control device. 1A and 1B (step S217).
  • the status acquisition unit 216 determines whether a preset device status acquisition time has arrived (step S218). Here, if the status acquisition unit 216 determines that the device status acquisition time has not yet arrived (step S218: No), the process of step S201 is executed again. On the other hand, if the status acquisition unit 216 determines that the device status acquisition time has arrived (step S218: Yes), it generates device status request information that requests the device 3 to transmit device status information (step S219). Next, the transmission control unit 219 transmits the device status request information by referring to the device identification information associated with the IP address information of the device 3 to which the device status request information is transmitted, which is stored in the device information storage unit 231.
  • step S220 The previous communication control devices 1A and 1B are specified (step S220).
  • the transmission control unit 219 executes an encapsulation process to add header information for specifying the specified communication control devices 1A and 1B as the transmission destination to the device state request information, and converts the encapsulated device state request information into the device state request information. is transmitted to the communication control devices 1A and 1B (step S221). After that, the process of step S201 is executed again.
  • the cloud server 2 uses the identification number information and IP address information of the device 3 to distinguish between the communication control devices 1A and 1B. If the control information is not stored in the device information storage unit 231, control information addressed to one device 3 will be transmitted to the device 3 redundantly because it passes through both the communication control devices 1A and 1B. Furthermore, if the above-mentioned device message filtering is not performed in the communication control devices 1A and 1B, the device message multicast from one device 3 (for example, the instance list notification message mentioned above) is transmitted to both communication control devices 1A and 1B. The data will be sent to the cloud server 2 via .
  • the transmission and reception of duplicate device messages for the number of communication control devices 1A, 1B occurs between the communication control devices 1A, 1B and the cloud server 2, and the transmission and reception between the communication control devices 1A, 1B and the cloud server 2 occurs.
  • the communication traffic between them will increase.
  • the device information storage unit 231 stores the identification number information and IP address information of each of the plurality of devices 3 to one of the communication control devices 1A and 1B. It is stored in association with device identification information.
  • the communication control devices 1A and 1B each receive a device 3 other than the device 3 assigned to the device 3 based on the IP address information given to the device 3 that is the source of the device message sent to the device itself. Filter (discard) device messages sent from .
  • the device message sent from the device 3 is sent to the cloud server 2 via only one of the communication control devices 1A and 1B, so the same device message is sent from the communication control devices 1A and 1B. Since leakage to the wide area network NW1 is suppressed, the amount of communication on the wide area network NW1 can be reduced accordingly.
  • the transmission determination unit 112 performs filtering of the device message based on IP address information that identifies the device 3 that is the source of the device message in the network layer. This eliminates the need for the transmission determination unit 112 to perform processing for determining the source of the device message in the application layer of the device message, thereby reducing the processing load on the communication control devices 1A and 1B.
  • the device 3 when the device 3 according to the present embodiment is newly connected to the local network NW2, or when the IP address information assigned to the device is changed, the device 3 transmits network participation notification information through communication control. Send to devices 1A and 1B. As a result, the filter information is updated each time the device 3 is newly connected to the local network NW2 or the IP address information assigned to the device 3 is changed. Communication volume can be reduced appropriately.
  • the communication control devices 1A and 1B may be gateway devices having the function of BBR8 and connected to the wide area network NW1.
  • the communication system may include a communication control device that is connected to the local network NW2 and has some of the functions of the communication control devices 1A and 1B described in the embodiment, and a communication control device 1A and 1B described in the embodiment. and a gateway device having the remaining functions.
  • the number of communication control devices connected to the local network NW2 may be three or more.
  • the device information storage unit 231 stores the IP address information and MAC address information of the device 3 and the identification number information unique to the device 3 in association with each other.
  • the present invention is not limited to this, and the device information storage unit 231 may mutually store the IP address information and MAC address information of the device 3, the model name information indicating the model name of the device 3, the serial number information indicating the manufacturing number of the device 3, etc. It may also be stored in association with each other.
  • various functions of the communication control devices 1A, 1B and cloud server 2 may be realized by software, firmware, or a combination of software and firmware.
  • the software or firmware is written as a program, and the program can be stored on a computer-readable device such as a flexible disk, CD-ROM (Compact Disc Read Only Memory), DVD (Digital Versatile Disc), MO (Magneto-Optical Disc), or flash memory.
  • a computer that can realize each of the above-mentioned functions may be configured by storing and distributing the program in a suitable recording medium and reading and installing the program into a computer.
  • OS Operating System
  • an application or by cooperation between the OS and an application, only the parts other than the OS may be stored in the recording medium.
  • each program may be posted on a bulletin board system (BBS) on a communication network and distributed via the network.
  • BSS bulletin board system
  • the above-described processes may be executed by starting these programs and executing them under the control of the OS in the same way as other application programs.
  • the present disclosure is suitable as a control device for a HEMS installed in a residence.
  • 1A, 1B Communication control device 2 Cloud server, 3 Equipment, 8 BBR, 101,201 CPU, 102,202 Main storage, 103,203 Auxiliary storage, 106,206 Communication department, 109,209 Bus, 111 Message acquisition 112 Transmission determination unit, 113, 219 Transmission control unit, 114, 211 Encapsulated message acquisition unit, 115 Message transmission unit, 116 Filter update unit, 131 Filter storage unit, 207 Time measurement unit, 212 Message type determination unit, 213 Combination Judgment unit, 214 Device information update unit, 215 Device identification information request unit, 216 Status acquisition unit, 217 Control information generation unit, 220 Filter update request unit, 231 Device information storage unit, 232 Status storage unit, NW1 Wide area network, NW2 Local network

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  • Signal Processing (AREA)
  • Automation & Control Theory (AREA)
  • Small-Scale Networks (AREA)
  • Computer And Data Communications (AREA)
PCT/JP2022/014300 2022-03-25 2022-03-25 通信システム、通信制御装置、サーバ、通信制御方法およびプログラム Ceased WO2023181339A1 (ja)

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JP2023504866A JP7325682B1 (ja) 2022-03-25 2022-03-25 通信システム、通信制御装置、サーバ、通信制御方法およびプログラム
US18/837,921 US20250158949A1 (en) 2022-03-25 2022-03-25 Communication system, communication control device, server, communication control method, and recording medium
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