WO2020105765A1

WO2020105765A1 - Method and system for linking to m2m platform using lora communication

Info

Publication number: WO2020105765A1
Application number: PCT/KR2018/014536
Authority: WO
Inventors: 송민환; 이상신; 원광호; 권영민; 이승우
Original assignee: 전자부품연구원
Priority date: 2018-11-23
Filing date: 2018-11-23
Publication date: 2020-05-28
Also published as: KR102108651B1

Abstract

Provided is a method and system for linking to an M2M platform using LoRa communication. A method according to an embodiment of the present invention may comprise the steps of: receiving a first message from an IOT terminal by a gateway; converting, by the gateway, the first message into a second message according to a possessed message format; and transferring, by the gateway, the converted second message to an IOT server, wherein the second message includes a payload shortened from a payload of the first message. By the present invention, M2M-based IOT data can be transmitted through LoRa communication in which long range communication is possible but transmittable data capacity is limitative, so as to enable stable and effective response to a network change and failure in an industrial site.

Description

M2M platform interworking method and system using LoRa communication

The present invention relates to an M2M platform interworking method and system, and more particularly, to a method and system interworking with an M2M platform using LoRa communication.

1 is a diagram schematically showing the configuration of an IoT system. As illustrated in FIG. 1, the IoT system is a structure in which an IoT server is located in an upper layer, IoT terminals are located in a lower layer, and gateways relay an IoT terminal and an IoT server in the middle layer.

Conventionally, such an IoT terminal can create / review / modify / delete resources through HTTP to exchange information with an IoT server, and mainly uses Ethernet and WiFi for HTTP protocol transmission.

In particular, the Ethernet and WiFi network environments are very important for IoT terminals applied to industrial sites to reliably transmit data to IoT servers. However, data transmission is interrupted when the network environment is unstable due to various variables in the industrial site. do.

The present invention has been devised to solve the above problems, and an object of the present invention is to provide an M2M platform interworking method and system capable of stably transmitting M2M-based IoT data using LoRa communication.

According to an embodiment of the present invention for achieving the above object, the M2M platform interworking method using LoRa communication comprises: a gateway receiving a first message from an IoT terminal; Converting the first message into a second message according to the message format retained by the gateway; And transmitting, by the gateway, the converted second message to the IoT server, wherein the second message may have a payload that is shorter than the payload of the first message.

In addition, the message format is any one of C (create), R (read), U (update), D (delete) data processing instruction, application resource, container resource, content instance resource, dictionary, content format It can consist of one command and payload.

And, in the message format, when generating a dictionary, original text and abbreviated text corresponding to the original text may be designated.

In addition, in the message format, when creating a content format, using the Jason format, an order of attributes of a plurality of contents to be sequentially recorded may be designated.

And, in the message format, an application resource name of an IoT server in which resource data included in the second message will be stored may be designated.

Further, in the message format, a container resource name of an IoT server in which resource data included in the second message will be stored may be designated.

In addition, in the second message, the attribute is omitted, and a plurality of contents composed only of value values may be sequentially recorded in the order of the attribute.

In addition, according to an embodiment of the present invention, the M2M platform interworking method using LoRa communication comprises: the gateway requesting a message format from the IoT server; And the gateway receiving and retaining the message format from the IoT server.

And according to an embodiment of the present invention, the M2M platform interworking method using LoRa communication includes the steps of the gateway requesting a message format for an added IoT terminal or an IoT terminal with a data structure or resource structure changed; Can be.

On the other hand, according to another embodiment of the present invention, the M2M platform interworking system using LoRa communication includes a first communication unit that receives a first message from an IoT terminal; A processor that converts the first message into a second message according to a message format held; And a second communication unit that delivers the converted second message to the IoT server. The second message may have a reduced payload than the payload of the first message.

On the other hand, according to another embodiment of the present invention, the M2M platform interworking method using LoRa communication, the gateway receives the message format from the IoT server and holds it, or adds the received message format to the existing message format, Or a message format management step of replacing the existing message format with the received message format; The gateway receiving a first message from the IoT terminal; The gateway converting the first message to a second message according to the message format; And transmitting, by the gateway, the converted second message to the IoT server, wherein the second message may have a payload that is shorter than the payload of the first message.

On the other hand, according to another embodiment of the present invention, the M2M platform interworking system using LoRa communication includes a first communication unit that receives a first message from an IoT terminal; Through the first communication unit, a message format is received and retained, the received message format is added to an existing message format, or an existing message format is replaced with the received message format, and the message A processor that converts the first message into a second message according to a format; And a second communication unit that delivers the converted second message to the IoT server. The second message may have a reduced payload than the payload of the first message.

As described above, according to embodiments of the present invention, long-distance communication is possible, but M2M-based IoT data can be transmitted through LoRa communication, which has a limited capacity of transmittable data, so that it is stable in network changes and failures in industrial sites. And can respond effectively.

1 schematically shows the configuration of an IoT system,

2 is a view provided in the description of the M2M platform interworking method using LoRa communication according to an embodiment of the present invention,

3 is a diagram illustrating a message format,

FIG. 4 is a diagram provided for the additional explanation of the second message,

5 is a diagram illustrating a dictionary payload format,

6 is a diagram illustrating a content format payload format,

7 is a diagram illustrating an application resource payload format,

8 is a diagram illustrating a container resource payload format,

9 is a diagram illustrating a first format of a content instance resource Payload;

10 is a diagram illustrating a second format of a content instance resource Payload,

11 is a view provided in the description of the M2M response request command using Class A of LoRa communication, and

12 is a block diagram of a gateway according to another embodiment of the present invention.

Hereinafter, the present invention will be described in more detail with reference to the drawings.

2 is a view provided for explaining the M2M platform interworking method using LoRa communication according to an embodiment of the present invention. 2, in the IoT environment, the gateway 200 requests a message format from the IoT server 300 (①), receives and holds the message format from the IoT server 300 (②), and the lower IoT terminal 100 The process of receiving a first message from (③), converting the first message into a second message according to the message format (④), and passing the second message to the IoT server 300 (⑤) is shown. .

That is, the gateway 200 according to an embodiment of the present invention uses the secured message format to transmit the first message through the secured message format in order to interwork with the M2M platform using LoRa communication with a limited data transmission / reception capacity of the transmitted message. It can be converted into a second message having a payload that is shorter than the payload.

And the M2M platform interworking method using LoRa communication according to an embodiment of the present invention relates to the IoT terminal 100 to which the gateway 200 is added or the changed IoT terminal 100 when the data structure or resource structure is changed. By requesting a message format, the changed message format is received from the IoT server 300 to add the received message format to the existing message format, or the existing message format can be replaced with the received message format. .

In addition, as shown in FIG. 1, it is common for a plurality of IoT terminals 100 to be subordinate to one gateway 200 and a plurality of gateways 200 to one IoT server 300. , The IoT environment applied to the embodiment of the present invention is also the same, but in FIG. 2, it should be noted that for convenience of description, one IoT terminal 100 and one gateway 200 are illustrated.

Here, the message format is illustrated in FIG. 3. As illustrated, the message format is one of Create, Read, Update, Delete data processing instructions, application resource (AE Resource), container resource (Container Resource), and content. Any one of the instance resource (ContentInstance Resource), the dictionary (Dictionary), and the content format (ContentFormat), and a payload are sequentially configured.

FIG. 4 is a diagram provided for the additional explanation of the second message. The second message converted to the message format includes one of information on the content format among information on application resources, information on container resources, information on content instance resources, and information on dictionaries.

When information about an application resource is included in the second message, an application resource name (AE Name) that is information for designating an application resource of the IoT server 300 may be included as information about the application resource.

And when the information about the container resource is included in the second message, the container names ("Voltage") are information for designating containers in which contents constituting the resource data included in the second message are to be stored, as information about the container resource. "," on / off "," dimming level ") may be included.

In addition, when information on the content instance resource is included in the second message, information on the order of attributes of a plurality of contents to be sequentially recorded as information on the content instance resource may be included.

On the other hand, in order to interwork with the M2M platform using LoRa communication where the data transmission and reception capacity of the transmitted message is limited, the message format according to an embodiment of the present invention includes the original text and the abbreviated text corresponding to the original text when the dictionary is generated. Can be specified.

The dictionary payload format is illustrated in FIG. 5. The message format "C, 4, LS, Lightsensor" shown in FIG. 5 contains information for generating a dictionary designating the original text of 'Lightsensor' as an abbreviated text of 'LS'.

That is, whenever a content instance for transmitting information collected through the IoT terminal 100 is generated, a dictionary is generated without using an application resource name and a container resource name, and the abbreviated text can be utilized to waste LoRa data packets. Can be prevented.

The content format can be used when transmitting the content of the content instance resource in JSON format.

The format of this content format payload is illustrated in FIG. 6. The content format payload “C, 5, 1, voltage, on / off, dimming_level” shown in FIG. 6 is the number 1 content format in which attributes of a plurality of contents to be sequentially recorded are designated in the order of voltage, on / off, and dimming_level Contains information for generating.

That is, in the message format, when the content format is generated, using the Jason format, the order of attributes of a plurality of contents to be sequentially recorded is specified, and in the resource data, the attribute is omitted, and a plurality of contents composed only of value values These can be listed sequentially in the order of the attributes.

Meanwhile, the message format may allow the application resource name of the IoT server 300 to store the resource data included in the second message. The format of the application resource payload is illustrated in FIG. 7. The application resource payload "C, 1, J, LightSensor" shown in FIG. 7 contains information for generating an application resource with an application resource name of 'LightSensor'.

In the message format, if a dictionary is created that specifies the original text of 'Lightsensor' as an abbreviated text of 'LS', to generate an application resource with the application resource name of 'LightSensor', the application resource payload "C, 1, J , LightSensor "may be included as" C, 1, J, [LS] ".

In addition, the message format may allow a container resource name of the IoT server 300 to store resource data included in the second message to be designated. The format of the container resource payload is illustrated in FIG. 8.

Container resource payload "C, 2, J, Lightsensor, VoltageStatus, S0000001" shown in FIG. 8 is information for generating a container having a container name of 'VoltageStatus' under an application resource having an application resource name of 'LightSensor'. Is recorded. Here, J is a code indicating whether to send in JSON format or XML format, and S0000001 is a resource ID.

On the other hand, as described above, when creating a content format, using the Jason format, a sequence of attributes of a plurality of contents to be sequentially recorded is designated. At this time, in the resource data, the attribute is omitted, and the value value A plurality of contents composed of only can be sequentially recorded in the order of attributes.

The format of the content instance resource payload can be applied to either the first format or the second format, and each format is illustrated in FIGS. 9 and 10.

As shown in FIG. 9, the content instance resource payload "C, 3, J, Lightsensor, VoltageStatus, S0000001, 12.5748" written in the first format is called 'VoltageStatus' under the application resource having an application resource name of 'LightSensor'. Under the container having a container name, information for creating a content instance resource '12 .5748 'is included.

In addition, as shown in FIG. 10, the content instance resource payload "C, 3, J, Lightsensor, LightStatus, S0000001, CF, 1, 12.5748, on, 70" written in the second format is an application resource name called 'LightSensor'. Information for transmitting 12.5748, on, and 70 as a value of Content Format 1 (Voltage, on / off, dimming_level) is contained in a container under the container name of 'VoltageStatus' under the application resource having. Here, 1 is a serial number of a pre-registered content format.

11 is a view provided for explanation of an M2M response request command using Class A of LoRa communication. The M2M platform interworking system according to an embodiment of the present invention may receive a response of an M2M request using Class A of LoRa communication.

At this time, since the LoRa Class A supports a method of confirming data to be received simultaneously while transmitting data, the IoT server 300 uses a Response request command called 'RES' to request M2M using Class A of LoRa communication. Response can be received.

As illustrated in FIG. 11, a response request command according to an application resource request having HTTP Response Code '201' and Resource ID 'S0000001' may be written as "201, S0000001", and a container having HTTP Response Code '500' The response request command according to the resource request may be written as “500”, and the response request command according to the HTTP Response Code '201' content instance resource request may be written as “201”.

12 is a block diagram of a gateway 200 according to another embodiment of the present invention. As illustrated in FIG. 12, the gateway 200 according to an embodiment of the present invention includes a wireless communication unit 210, an Internet interface 220, a processor 230, and a storage unit 240.

The wireless communication unit 210 is a communication means for wirelessly communicating with the IoT terminal 100 to receive a first message, and the Internet interface 220 accesses the Internet to transmit a second message to the IoT server 300 It is a means of communication.

The processor 230 secures a message format according to the method illustrated in FIG. 2 described above, converts a first message into a second message using the secured message format, and converts device data into resource data.

The storage unit 240 is a storage medium that stores a message format and provides necessary storage space for the processor 230 to operate.

On the other hand, the technical idea of the present invention can be applied to a computer-readable recording medium containing a computer program that performs functions of the apparatus and method according to the present embodiment. Further, the technical idea according to various embodiments of the present invention may be implemented in the form of computer-readable codes recorded on a computer-readable recording medium. The computer-readable recording medium can be any data storage device that can be read by a computer and stores data. Of course, the computer-readable recording medium can be a ROM, RAM, CD-ROM, magnetic tape, floppy disk, optical disk, hard disk drive, and the like. In addition, computer-readable codes or programs stored on a computer-readable recording medium may be transmitted through a network connected between computers.

In addition, although the preferred embodiments of the present invention have been illustrated and described above, the present invention is not limited to the specific embodiments described above, and the technical field to which the present invention pertains without departing from the gist of the present invention claimed in the claims. In addition, various modifications can be implemented by those skilled in the art, and these modifications should not be individually understood from the technical idea or prospect of the present invention.

Claims

The gateway, receiving the first message from the IoT terminal;

Converting the first message into a second message according to the message format retained by the gateway; And

It includes; the gateway, passing the converted second message to the IoT server;

The second message,

M2M platform interworking method, characterized in that it retains a payload that is shorter than the payload of the first message.
The method according to claim 1,

The message format is:

C (create), R (read), U (update), D (delete) data processing instruction, application resource, container resource, content instance resource, dictionary, content format command and payload. M2M platform interworking method using LoRa communication, characterized in that configured.
The method according to claim 2,

The message format is:

When generating a dictionary, the M2M platform interworking method using LoRa communication, characterized in that an original text and an abbreviated text corresponding to the original text are designated.
The method according to claim 2,

The message format is:

When creating a content format, using Jason format, a method of interworking with M2M platform using LoRa communication, characterized in that an order of attributes of a plurality of contents to be sequentially recorded is specified.
The method according to claim 4,

The message format is:

M2M platform interworking method using LoRa communication, characterized in that the application resource name of the IoT server in which the resource data included in the second message is to be stored is designated.
The method according to claim 4,

The message format is:

M2M platform interworking method using LoRa communication, characterized in that the container resource name of the IoT server in which the resource data included in the second message is to be stored is designated.
The method according to claim 4,

In the second message,

M2M platform interworking method using LoRa communication, characterized in that the attributes are omitted, and a plurality of contents composed only of value values are sequentially recorded in the order of the attributes.
The method according to claim 1,

Requesting, by the gateway, a message format to the IoT server; And

The gateway, receiving and retaining the message format from the IoT server; M2M platform interworking method using LoRa communication further comprising.
The method according to claim 8,

The gateway, requesting a message format for the added IoT terminal or the IoT terminal with a data structure or resource structure changed; further comprising: M2M platform interworking method using LoRa communication.
A first communication unit for receiving a first message from the IoT terminal;

A processor that converts the first message into a second message according to a message format held; And

Includes; a second communication unit for transmitting the converted second message to the IoT server,

The second message,

M2M platform interworking system using LoRa communication, characterized in that it retains a payload that is shorter than the payload of the first message.
A message format management step in which the gateway receives and retains a message format from the IoT server, adds the received message format to an existing message format, or replaces an existing message format with the received message format. ;

The gateway receiving a first message from the IoT terminal;

The gateway converting the first message to a second message according to the message format; And

It includes; the gateway, passing the converted second message to the IoT server;

The second message,

M2M platform interworking method using LoRa communication, characterized in that it retains a payload that is shorter than the payload of the first message.
A first communication unit for receiving a first message from the IoT terminal;

Through the first communication unit, a message format is received and retained, the received message format is added to an existing message format, or an existing message format is replaced with the received message format, and the message A processor that converts the first message into a second message according to a format; And

Includes; a second communication unit for transmitting the converted second message to the IoT server,

The second message,

M2M platform interworking system using LoRa communication, characterized in that it retains a payload that is shorter than the payload of the first message.