WO2020170780A1 - Dispositif passerelle, procédé de communication, et programme informatique - Google Patents

Dispositif passerelle, procédé de communication, et programme informatique Download PDF

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Publication number
WO2020170780A1
WO2020170780A1 PCT/JP2020/003875 JP2020003875W WO2020170780A1 WO 2020170780 A1 WO2020170780 A1 WO 2020170780A1 JP 2020003875 W JP2020003875 W JP 2020003875W WO 2020170780 A1 WO2020170780 A1 WO 2020170780A1
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WIPO (PCT)
Prior art keywords
communication
communication protocol
unit
request
gateway
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PCT/JP2020/003875
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English (en)
Japanese (ja)
Inventor
順一 古川
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パナソニックＩｐマネジメント株式会社
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Priority to JP2021501808A priority Critical patent/JP7113319B2/ja
Publication of WO2020170780A1 publication Critical patent/WO2020170780A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
    • H04L9/40—Network security protocols
    • 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]
    • H04L12/46—Interconnection of networks

Definitions

  • the present disclosure relates to communication technology, and particularly to a gateway device, a communication control method, and a computer program.
  • IoT Internet of Things
  • the interface (in other words, communication path) of multiple devices installed in a house etc. may not be one, and the communication protocol used by each device may be different. Under such circumstances, it is required to efficiently link a plurality of devices installed in a house or the like.
  • the present disclosure has been made in view of such circumstances, and one object thereof is to preferably realize cooperation of a plurality of devices connected to different interfaces and operating with different protocols.
  • a gateway device provides a plurality of communication units corresponding to different types of communication protocols and a communication protocol used by each of a plurality of devices connected to the device.
  • a storage unit for storing and a control unit are provided.
  • the plurality of communication units include a first communication unit that communicates with the first device according to the first communication protocol and a second communication unit that communicates with the second device according to a second communication protocol different from the first communication protocol. And a communication unit.
  • the control unit refers to the storage unit when the request transmitted from the first device to the second device and the request complying with the first communication protocol is accepted by the first communication unit, A process of identifying the second communication protocol as a communication protocol used by the second device and transmitting a request to the second device to the second communication unit corresponding to the second communication protocol among the plurality of communication units. Delegate.
  • Another aspect of the present invention is a communication method.
  • This method is a method executed by the gateway device, and the gateway device uses a plurality of communication units corresponding to a plurality of different types of communication protocols and a communication protocol used by each of a plurality of devices connected to the device. And a storage unit for storing.
  • the plurality of communication units include a first communication unit that communicates with the first device according to the first communication protocol and a second communication unit that communicates with the second device according to a second communication protocol different from the first communication protocol. And a communication unit.
  • the second device is referred to by referring to the storage unit.
  • the second communication protocol is identified as the communication protocol used by, and the process of transmitting the request to the second device is delegated to the second communication unit corresponding to the second communication protocol among the plurality of communication units.
  • the subject of the device or method according to the present disclosure includes a computer.
  • the functions of the subject of the apparatus or method according to the present disclosure are realized by the computer executing the program.
  • the computer includes a processor that operates according to a program as a main hardware configuration.
  • the processor may be of any type as long as it can realize the function by executing the program.
  • the processor is composed of a semiconductor integrated circuit (IC) or one or more electronic circuits including an LSI (large scale integration). Although IC or LSI here, they may be called system LSI, VLSI (very large scale integration) or USLI (ultra large scale integration) depending on the degree of integration.
  • a field programmable gate array (FPGA) that is programmed after the LSI is manufactured, or a reconfigurable logic device that can reconfigure the junction relation inside the LSI or set up the circuit section inside the LSI can be used for the same purpose.
  • FPGA field programmable gate array
  • the plurality of electronic circuits may be integrated on one chip or may be provided on the plurality of chips.
  • the plurality of chips may be integrated in one device or may be provided in the plurality of devices.
  • the program is recorded in a non-transitory recording medium such as a computer-readable ROM, an optical disk, a hard disk drive.
  • the program may be stored in the recording medium in advance, or may be supplied to the recording medium via a wide area communication network such as the Internet.
  • FIG. 1 shows the configuration of a communication system 10 of the embodiment.
  • the communication system 10 is built in a building such as a house, and includes a plurality of interfaces (in other words, communication paths) and a plurality of devices.
  • the plurality of devices are so-called IoT devices connected to a network, and include, for example, home electric appliances such as air conditioners and lights, information devices such as smartphones, and household equipment devices such as solar power generators and power storage devices.
  • the interface 1 is an IP network, and the communication protocol is Echonet Lite (“Echonet” is a registered trademark).
  • the device 11, the device 12, the controller 20, and the router 22 are connected to the interface 1.
  • the controller 20 is a device that controls the operation of each device in the communication system 10.
  • the controller 20 is a HEMS (Home Energy Management System) controller.
  • the router 22 is connected to the server 24 on the cloud.
  • the communication protocol of the interface 2 is BLE (Bluetooth Low Energy, "Bluetooth” is a registered trademark).
  • the device 13 and the device 14 are connected to the interface 2.
  • the communication protocol of the interface 3 is serial communication.
  • a device 15 is connected to the interface 3.
  • the communication protocol of the interface 4 is a specific low power radio (920 MHz band radio or the like).
  • the device 16 and the device 17 are connected to the interface 4.
  • the communication system 10 does not have one type of interface to which a plurality of devices are connected, and does not have one type of communication protocol used by each device.
  • the communication system 10 is provided with a gateway 26 in order to link devices having different communication protocols on different interfaces.
  • the gateway 26 is a communication device that absorbs a difference in interface and a difference in communication protocol between a plurality of devices and relays data transmitted and received between the plurality of devices.
  • FIG. 2 is a block diagram showing functional blocks of the gateway 26 of FIG.
  • Each block shown in the block diagram of the present disclosure can be realized by an element such as a CPU/memory of a computer or a mechanical device in terms of hardware, and by a computer program or the like in terms of software.
  • the functional blocks realized by their cooperation are drawn. Those skilled in the art will understand that these functional blocks can be realized in various ways by combining hardware and software.
  • the gateway 26 includes a communication unit 30, an access control unit 32, and an object database 34.
  • a computer program including a plurality of modules in which the functions of the plurality of functional blocks illustrated in FIG. 2 are implemented may be stored in a recording medium and installed in the storage of the gateway 26 via the recording medium. Alternatively, the above computer program may be installed in the storage of the gateway 26 via a communication network.
  • the CPU of the gateway 26 may perform the function of each functional block by reading the computer program into the main memory and executing the computer program.
  • the communication unit 30 communicates with an external device and transmits/receives data to/from the external device.
  • the communication unit 30 includes a first communication unit 40, a second communication unit 42, a third communication unit 44, and a fourth communication unit 46 that support different types of communication protocols.
  • the first communication unit 40, the second communication unit 42, the third communication unit 44, and the fourth communication unit 46 are collectively referred to as a communication unit.
  • the first communication unit 40 is connected to the interface 1 and communicates with the controller 20, the router 22, the device 11, and the device 12 according to the Echonet Lite protocol.
  • the second communication unit 42 is connected to the interface 2 and communicates with the device 13 and the device 14 in accordance with the BLE protocol.
  • the third communication unit 44 is connected to the interface 3 and communicates with the device 15 according to the serial communication protocol.
  • the fourth communication unit 46 is connected to the interface 4 and communicates with the device 16 and the device 17 in accordance with the protocol of extra small radio.
  • Each of the first communication unit 40, the second communication unit 42, the third communication unit 44, and the fourth communication unit 46 includes a plurality of functions (API (Application (Application Programming Interface)).
  • FIG. 3 shows a function implemented in each communication unit. Among the functions shown in FIG. 3, “init”, “get”, and “set” are functions called from an external device, and “tx” and “rx” are functions called from the access control unit 32.
  • the object database 34 holds in memory a plurality of virtual objects corresponding to a plurality of devices connected to the gateway 26.
  • the object database 34 stores a virtual object corresponding to the device 11, a virtual object corresponding to the device 13, and a virtual object corresponding to the device 15.
  • the virtual object of the embodiment includes identification information of the corresponding device (for example, a class ID and an object ID described later) and information indicating the state of the corresponding device.
  • the access control unit 32 executes processing for relaying data between multiple devices.
  • the access control unit 32 includes a routing table 50, a notification unit 51, a search unit 52, a specifying unit 54, a transfer unit 56, and an updating unit 58.
  • the routing table 50 stores, for each of a plurality of devices connected to the gateway 26, information about a communication protocol used by each device for communication.
  • the routing table 50 stores a correspondence relationship between a plurality of devices, an interface to which each device is connected, and a communication protocol used by each device.
  • the routing table 50 may store a correspondence relationship between a plurality of devices and communication units (the first communication unit 40, the second communication unit 42,%) Connected to the respective devices.
  • FIG. 4 shows an example of the routing table.
  • the routing table in the figure shows a routing table for the device 13.
  • Data related to the actual device 13 is stored in the real object column of the routing table.
  • the interface/protocol type of the real object sequence the type of communication protocol used by the device 13 is recorded.
  • the interface/protocol type is associated with any of the plurality of communication units in advance. Therefore, the interface/protocol type is information that can identify the communication unit connected to the interface to which the device 13 is connected. For example, when the interface/protocol type is BLE, the second communication unit 42 is specified.
  • the address and the length of the device 13 in the interface (that is, the interface 2) to which the device 13 is connected are recorded.
  • the class ID and the object ID of the real object sequence include data for uniquely identifying the device 13 in the communication system 10 (in the system of Echonet Lite in the embodiment), in other words, a unique ID indicating the device 13. Will be recorded.
  • the virtual object column of the routing table stores data related to a virtual object (a virtual object in Echonet Lite in the embodiment) corresponding to the device 13. Echonet write is recorded in the interface/protocol type of the virtual object sequence. In the address length and address of the virtual object sequence, the address and the length of the device 13 in the calling side interface (interface 1 in the embodiment) are recorded.
  • the class ID and the object ID of the virtual object sequence include data for uniquely identifying the device 13 in the communication system 10 (in the Echonet Lite system in the embodiment), in other words, a unique ID indicating the device 13. Will be recorded.
  • a device that uses the first communication protocol is referred to as a first device
  • a device that uses a second communication protocol different from the first communication protocol is referred to as a second device.
  • the first communication protocol may be Echonet Lite and the first device may be the controller 20.
  • the second communication protocol may be BLE, and the second device may be the device 13 and the device 14.
  • the notification unit 51 uses the device information including the information of the second device as the information of the device capable of communicating using the first communication protocol when the predetermined notification condition is satisfied. Notify to.
  • the notification condition may be that the first device has started up, or that the first device has notified that the first device has started up. Further, the notification unit 51 may notify each device connected to the gateway 26 of the latest device information when a predetermined time has passed from the previous notification, that is, periodically.
  • the device information may include information on a virtual object corresponding to the second device, and may include, for example, a set of a class ID and an object ID of each of one or more second devices.
  • the search unit 52 searches the object database 34 and determines the request destination. Confirm that the second device is connected. In other words, the search unit 52 confirms whether or not a virtual object corresponding to the second device exists in the object database 34.
  • the specifying unit 54 refers to the routing table 50 and specifies the interface to which the second device is connected and the communication protocol used by the second device.
  • the identifying unit 54 identifies the interface/protocol type of the real object sequence by referring to the routing table 50 regarding the second device.
  • the specifying unit 54 holds the correspondence between the interface/protocol type and the communication unit.
  • the identifying unit 54 further identifies the interface to which the second device is connected and the communication unit corresponding to the communication protocol used by the second device (that is, one of the first communication unit 40 to the fourth communication unit 46). To do.
  • the transfer unit 56 delegates the process of transmitting the request to the communication unit corresponding to the interface and the communication protocol of the request destination second device, which is specified by the specifying unit 54.
  • the updating unit 58 When the response to the request is received from the second device, the updating unit 58, based on the content of the response, the virtual object corresponding to the second device among the virtual objects stored in the object database 34. To update.
  • FIG. 5 is a sequence diagram showing the operation of the communication system 10.
  • FIG. 5 shows an operation when writing data from the controller 20 that uses Echonet Write as a communication protocol to the device 13 that uses BLE as a communication protocol.
  • the following write request may be data for instructing lighting.
  • the notification unit 51 of the gateway 26 determines a device that can communicate using the communication protocol of the interface 1 when a predetermined condition is satisfied, such as when the activation of the controller 20 is detected.
  • the device information shown is notified to the controller 20 via the first communication unit 40.
  • the device information includes, for example, information on the device 13, the device 14, the device 15, and the like as devices that can communicate with Echonet Lite.
  • the controller 20 can be made to recognize that the device 13, the device 14, the device 15 and the like can be accessed by Echo Net Write (in other words, the communication protocol used by the controller 20).
  • the controller 20 sends to the interface 1 a write request to the device 13 that complies with Echonet Write (S10).
  • the write request conforming to Echonet Write is a write request conforming to the format and procedure defined by Echonet Write. For example, it is a write request in which the class ID and the object ID of the device 13 notified in advance are specified as the object of Echonet Light.
  • the write request calls “set” among the functions (FIG. 3) disclosed by the first communication unit 40 of the gateway 26, and specifies the device 13 (class ID and object ID) of the write destination and the write content as parameters. It may be one that does.
  • the first communication unit 40 of the gateway 26 receives the write request transmitted from the controller 20 via the interface 1 (S12).
  • the first communication unit 40 transmits a write request to the virtual object corresponding to the device 13 to the access control unit 32 based on the received write request (S14).
  • the search unit 52 of the access control unit 32 Upon receiving the write request to the virtual object corresponding to the device 13, the search unit 52 of the access control unit 32 confirms whether the virtual object corresponding to the device 13 is stored in the object database 34 (S16). If the virtual object including the set of the class ID and the object ID designated by the write request is stored in the object database 34, the search unit 52 determines that the virtual object corresponding to the writing destination device is stored. In other words, it is determined that the writing destination device is connected.
  • the access control unit 32 continues the process of transmitting the write request to the device 13. On the other hand, if the virtual object corresponding to the device 13 is not stored in the object database 34, the access control unit 32 stops the process of transmitting the write request to the device 13.
  • the identifying unit 54 of the access control unit 32 identifies the actual interface and communication protocol of the device 13 with reference to the routing table 50, and communicates with the interface and the communication module (the second communication unit 42 in this example). ) Is specified (S18).
  • the identifying unit 54 refers to the routing table 50 and identifies the data of the real object having the combination of the class ID and the object ID designated by the write request to the virtual object corresponding to the device 13,
  • the interface/protocol type “BLE” set in the data of the real object may be specified.
  • the specifying unit 54 may specify the second communication unit 42, which is a communication module preliminarily associated with the BLE.
  • the transfer unit 56 of the access control unit 32 delegates the process of transmitting the write request to the device 13 to the second communication unit 42 specified by the specifying unit 54 (S20). Specifically, the transfer unit 56 calls “tx” in the function (FIG. 3) disclosed by the second communication unit 42, and writes the address of the device 13 of the writing destination (the real address of the device 13 set in the routing table). ) And the contents to be written may be specified as parameters (eg, arguments).
  • the tx function of the second communication unit 42 is implemented so as to transmit data according to the BLE protocol (format, procedure, etc.).
  • the second communication unit 42 executes the tx function and transmits a write request to the device 13 via the interface 2 according to the BLE protocol (S22).
  • the device 13 updates its own data in response to the write request (S24). For example, when the device 13 is a lighting device, the lighting is turned on.
  • the device 13 transmits a BLE response message indicating the completion of writing to the interface 2 (S26).
  • the second communication unit 42 of the gateway 26 receives the BLE response message transmitted from the device 13 via the interface 2 (S28).
  • the second communication unit 42 transmits a request to update the virtual object corresponding to the device 13 (here, a request to write the response content) to the access control unit 32 based on the received response message (S30).
  • the updating unit 58 of the access control unit 32 updates the data of the virtual object corresponding to the device 13 stored in the object database 34 based on the response content from the device 13. For example, when the response content from the device 13 indicates the latest state of the device 13 (for example, lighting), the update unit 58 writes the latest state in the virtual object.
  • the gateway 26 of the embodiment it is possible to absorb the interface difference and communication protocol difference between a plurality of devices and facilitate the cooperation of the plurality of devices. For example, as shown in FIG. 1, even when there are a plurality of devices that operate with a plurality of types of protocols, the protocol used on the main interface (for example, Echonet Lite, etc.) is used to perform the plurality of devices. Can be controlled. As a result, it is possible to promote automatic control of equipment installed in a residential building, management of equipment status, and visualization of equipment information.
  • the protocol used on the main interface for example, Echonet Lite, etc.
  • the data of the virtual object stored in the object database 34 of the gateway 26 may be set manually or automatically.
  • the gateway 26 may further include an object setting unit.
  • the object setting unit uses the device information to acquire the data of the virtual object corresponding to the external device. May be set and stored in the object database 34. At that time, the object setting unit may give a unique class ID and object ID to the external device.
  • the data of the routing table stored in the routing table 50 of the gateway 26 may be set manually or automatically.
  • the gateway 26 may further include a routing table setting unit.
  • the routing table setting unit sets the data of the routing table related to the external device based on the device information. However, it may be stored in the routing table 50.
  • the routing table setting unit may set the value of the real object column of the routing table based on the interface/protocol type, address, etc. indicated by the device information transmitted from the external device. At this time, the routing table setting unit may give a unique class ID and object ID to the external device and set the external device in the routing table. In addition, the routing table setting unit may set virtual object information in the routing table according to the communication protocol (eg, Echonet Write) of the request source for the external device.
  • the virtual object automatic setting and the routing table automatic setting may be executed as a series of processes.
  • the second modification will be described.
  • the controller 20 on the interface 1 (Echonet Lite) controls devices connected to other than the interface 1
  • the server 24 connected to the interface 1 connects to a device other than the interface 1.
  • the same processing sequence as that of the embodiment is applied to the case of controlling the device (for example, acquisition or setting of data).
  • the former device is the first device and the latter device is the second device.
  • the processing sequence is similar to that of the embodiment.
  • the storage unit (50) is referred to identify the second communication protocol as the communication protocol used by the second device, and the second communication protocol of the plurality of communication units (30) Delegating a process of transmitting the request to the second device to a second communication unit (42) corresponding to a communication protocol, A gateway device (26).
  • the difference in communication protocol between the first device and the second device can be absorbed, and the first device and the second device can be made to cooperate with each other.
  • each communication unit corresponding to each communication protocol executes the process of actually communicating with the external device. As a result, the control unit does not need to implement processing according to each communication protocol, and the implementation cost of the control unit can be reduced.
  • a second storage unit (34) for storing a plurality of objects corresponding to a plurality of devices connected to the apparatus,
  • the first communication unit (40) receives a request sent from the first device to the second device
  • the first communication unit (40) sends a request to an object corresponding to the second device to the control unit ( 32)
  • the control unit (32) continues the process for transmitting the request to the second device when an object corresponding to the second device exists.
  • the gateway device (26) according to item 1. According to this gateway device, the interfaces of the communication unit and the control unit can be unified, and it is possible to prevent a request from being sent to an unconnected device.
  • the second communication unit (42) receives a response to the request from the second device, transmits a request to update an object corresponding to the second device to the control unit (32), The control unit (32) updates the object corresponding to the second device based on the content of the response, The gateway device (26) according to item 2.
  • the state of the second device after the request process can be reflected in the object corresponding to the second device, and the relay process according to the state of the second device after the request process is executed. be able to.
  • the gateway device (26) according to any one of Items 1 to 3.
  • the first device recognizes that the second device is a device that can communicate using the first communication protocol.
  • the first communication protocol is Echonet Lite
  • the second communication protocol is different from Echonet Lite.
  • the gateway device (26) according to any one of Items 1 to 4. According to this gateway device, it is possible to control a device using a communication protocol different from that of Echonet Lite by using Echonet Lite used on the main interface.
  • the storage unit (50) is referred to
  • the second communication protocol is identified as the communication protocol used by the second device
  • the second communication protocol of the plurality of communication modules (30) is identified. Delegating a process of transmitting the request to the second device to a second communication module (42) corresponding to a communication protocol.
  • Computer program According to this computer program, the same effect as item 1 can be obtained.
  • the present disclosure can be applied to a communication gateway device.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Computer Security & Cryptography (AREA)
  • Computer And Data Communications (AREA)
  • Small-Scale Networks (AREA)
  • Communication Control (AREA)

Abstract

L'invention concerne une première unité de communication 40 qui communique avec un premier appareil conformément à un premier protocole de communication. Une seconde unité de communication 42 communique avec un second appareil conformément à un second protocole de communication. Une unité de commande d'accès 32, lorsqu'une demande transmise du premier appareil au second appareil et conforme au premier protocole de communication a été reçue par la première unité de communication 40, se réfère à une table de routage 50 et identifie le second protocole de communication en tant que protocole de communication utilisé par le second appareil. L'unité de commande d'accès 32 délègue, à la seconde unité de communication 42 correspondant au second protocole de communication, un processus de transmission de la demande au second appareil.
PCT/JP2020/003875 2019-02-22 2020-02-03 Dispositif passerelle, procédé de communication, et programme informatique WO2020170780A1 (fr)

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JP2019-030889 2019-02-22

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007036937A (ja) * 2005-07-29 2007-02-08 Mitsubishi Electric Corp プロトコル変換プログラム作成支援装置及び作成支援プログラム
JP2008294612A (ja) * 2007-05-23 2008-12-04 Toshiba Corp 制御装置
JP2010097275A (ja) * 2008-10-14 2010-04-30 Toshiba Corp ネットワーク家電制御システム

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007036937A (ja) * 2005-07-29 2007-02-08 Mitsubishi Electric Corp プロトコル変換プログラム作成支援装置及び作成支援プログラム
JP2008294612A (ja) * 2007-05-23 2008-12-04 Toshiba Corp 制御装置
JP2010097275A (ja) * 2008-10-14 2010-04-30 Toshiba Corp ネットワーク家電制御システム

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