KR20170124055A - APPARATUS FOR COMPATIBILITY BETWEEN ZIGBEE AND CoAP - Google Patents

APPARATUS FOR COMPATIBILITY BETWEEN ZIGBEE AND CoAP Download PDF

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Publication number
KR20170124055A
KR20170124055A KR1020160071075A KR20160071075A KR20170124055A KR 20170124055 A KR20170124055 A KR 20170124055A KR 1020160071075 A KR1020160071075 A KR 1020160071075A KR 20160071075 A KR20160071075 A KR 20160071075A KR 20170124055 A KR20170124055 A KR 20170124055A
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South Korea
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coap
layer
zigbee
sensor node
request
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KR1020160071075A
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Korean (ko)
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최중덕
이현찬
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주식회사 맥스포
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L67/00—Network arrangements or protocols for supporting network services or applications
    • H04L67/01—Protocols
    • H04L67/02—Protocols based on web technology, e.g. hypertext transfer protocol [HTTP]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L67/00—Network arrangements or protocols for supporting network services or applications
    • H04L67/01—Protocols
    • H04L67/12—Protocols specially adapted for proprietary or special-purpose networking environments, e.g. medical networks, sensor networks, networks in vehicles or remote metering networks
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
    • H04L69/16—Implementation or adaptation of Internet protocol [IP], of transmission control protocol [TCP] or of user datagram protocol [UDP]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/80—Services using short range communication, e.g. near-field communication [NFC], radio-frequency identification [RFID] or low energy communication

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Health & Medical Sciences (AREA)
  • Computing Systems (AREA)
  • General Health & Medical Sciences (AREA)
  • Medical Informatics (AREA)
  • Computer Security & Cryptography (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)

Abstract

The present invention relates to a linkage system and a linkage device between a ZigBee and a constrained application protocol (CoAP), which make a sensor node connected based on a ZigBee compatible with an internet environment using a CoAP, and a method for controlling sensor node using the same. The linkage system between a ZigBee and a CoAP according to an embodiment of the present invention comprises: a sensor node in which a ZigBee physical layer, a ZigBee link layer, and a ZigBee network layer for ZigBee communication are defined and a CoAP layer for linking with a CoAP environment is defined; and a gateway in which the ZigBee physical layer, the ZigBee link layer, the ZigBee network layer, and the CoAP layer are defined for ZigBee communication by being compatible with the sensor node, and an Ethernet layer, a UDP/IP layer, and a CoAP layer are defined for communication with a web server connected through an IP-based communication network, and which allocates a virtual IP address to the sensor node, receives a request from the web server based on the virtual IP address to convert the request into a format adequate for the CoAP, transmits the converted request to the sensor node connected through ZigBee communication, and converts data received from the sensor node into a format adequate for the CoAP to transmit the same to the web server.

Description

TECHNICAL FIELD [0001] The present invention relates to a system and an apparatus for interworking between a ZigBee and a CoAP,

The present invention relates to an interworking system and apparatus capable of interworking a non-IP-based object Internet environment based on, for example, a Zigbee communication, and a CoAP-based object Internet environment, and a control method of a sensor node using the same.

Recently, the expectation and interest of Internet of Things (IoT) is increasing. In order for various devices to be connected to the Internet, a lightweight and fast communication protocol is needed, which can also use nodes with low memory and low processing power. The International Internet Standardization Organization (IETF) has defined a CoAP (Constructed Application Protocol, hereinafter referred to as 'CoAP') as a web protocol for nodes with constraints, and has developed oneM2M, ETSI, Other standards bodies such as the Mobile Alliance (OMA) have adopted CoAP. As a result, in recent Internet environments, CoAPs that utilize low power and HTTP support have been widely used. However, there are many cases where Zigbee communication is used in the Internet environment of objects, so that HTTP communication can not be performed.

For this reason, as a part of the standard development for CoAP, researches on IP support method to support object internet environment using CoAP in ZigBee communication (non-IP network) which does not include IP are underway .

Korean Registered Patent No. 10-157928 (December 17, 2015)

The present invention provides a system and an apparatus for interworking between a ZigBee and a CoAP for interoperating a sensor node connected on a ZigBee basis to an Internet environment using a CoAP, and a method of controlling the sensor node using the same.

In addition, according to the present invention, a virtual IP address is assigned to a ZigBee-based sensor node, and a table is generated by mapping information of the virtual node and the sensor node. Based on the table, ZigBee CoAP interworking system, apparatus, and method of controlling a sensor node using the same.

In order to solve the problem to be solved, the ZigBee communication and CoAP interworking system according to the embodiment of the present invention defines a ZigBee physical layer, a ZigBee link layer and a ZigBee network layer for ZigBee communication, and cooperates with the CoAP environment A ZigBee network layer, a ZigBee network layer, and a CoAP layer for ZigBee communication, which are compatible with the sensor node, and are connected through an IP-based communication network; A UDP / IP layer and a CoAP layer are defined for the communication of the sensor node, and a virtual IP address is allocated to the sensor node, and a request is received from the web server based on the virtual IP address, Converts the converted request into a suitable form, transmits the converted request to a sensor node connected via a zigbee communication, It may convert the data received from a node into a form suitable for CoAP comprise a gateway for transmitting to the web server.

In order to solve the problem to be solved, the Zigbee communication and CoAP interworking apparatus according to an embodiment of the present invention includes a ZigBee physical layer for ZigBee communication, a ZigBee link layer, a ZigBee network layer, a CoAP layer, A link layer, a ZigBee network layer, and a CoAP layer for ZigBee communication with the sensor node; and a communication module for communicating with the web server through the HTTP protocol An application layer for converting a request received from the web server into a form suitable for the CoAP or converting data received from the sensor node into a form suitable for the CoAP, .

According to an embodiment of the present invention, the interworking device manages a table storing data in which the virtual IP address and the information of the sensor node are mapped, and transmits the request or the received data to a CoAP A processor for generating a radio signal based on the request converted by the CoAP processor and transmitting the generated radio signal to a sensor node corresponding to information of a sensor node mapped to the virtual IP address, An RF module for receiving the data in response to the request and providing the data to the CoAP processor; and a controller for analyzing the request received from the web server by performing communication with the web server, And a TCP / IP module for generating a packet for communication with the web server and transmitting the packet to the web server.

According to an embodiment of the present invention, the request may be a Get-type request message for receiving a sensor value sensed by the sensor node.

According to the embodiment of the present invention, the request may be a Get-type request message including a control parameter for controlling the sensor node.

According to an embodiment of the present invention, there is provided a method of controlling a sensor node using a Zigbee communication device and a CoAP interworking device according to an embodiment of the present invention includes a ZigBee physical layer, a ZigBee link layer, a ZigBee network layer, A link layer, a ZigBee network layer, and a CoAP layer for Zigbee communication with the sensor node, and includes an Ethernet layer, a UDP / IP layer for communication over the HTTP protocol with the web server, A method for controlling a sensor node in an interworking device including an IP layer and a COAP layer and including an application layer for data conversion on an uppermost layer, the method comprising: allocating a virtual IP address to the sensor node, It creates a table by mapping address and sensor node information, and provides it to the web server. Receiving a request based on a virtual IP address in a table from the web server, extracting a virtual IP address through analysis of the request, and converting the in-request data into a form suitable for CoAP Transmitting the converted in-request data to a sensor node corresponding to information of a sensor node mapped to the extracted virtual IP address, and transmitting the received data to a sensor node corresponding to information of a sensor node mapped to the extracted virtual IP address, And transmitting the converted data to the web server.

According to an embodiment of the present invention, the step of receiving the request may receive a request message of a Get method for receiving the sensor value sensed by the sensor node.

According to an embodiment of the present invention, the step of receiving the request may receive a request message of a Get method including control parameters for controlling the sensor node.

According to an embodiment of the present invention, the step of transmitting to the sensor node includes generating a radio signal based on the request converted by the CoAP processor and transmitting the generated radio signal to the sensor node corresponding to the information of the sensor node mapped to the virtual IP address, As shown in Fig.

According to embodiments of the present invention, the present invention provides an interworking device between a ZigBee and a CoAP for interoperating a sensor node connected on a ZigBee basis to an Internet environment using a CoAP, It is possible to enable communication to the sensor node.

According to the embodiments of the present invention, a virtual IP address is assigned to a ZigBee-based sensor node, and a table is generated by mapping the information of the sensor node and the virtual IP address. Based on this, communication between the web server and the sensor node , It is possible to provide compatibility with CoAP to Zigbee communication without IP, and it is not necessary to replace the Zigbee communication environment with a new CoAP environment through the provision of the interworking device between ZigBee and CoAP. Cost can be reduced.

FIG. 1 is a diagram illustrating an interworking system for supporting the environment of the object Internet using CoAP in Zigbee communication according to an embodiment of the present invention. Referring to FIG.
2 is a block diagram illustrating a detailed configuration of a gateway according to an embodiment of the present invention.
3 is a flowchart illustrating a process of controlling a specific sensor node by a gateway according to an embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings, which will be readily apparent to those skilled in the art. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. In order to clearly illustrate the present invention, parts not related to the description are omitted, and similar parts are denoted by like reference characters throughout the specification.

Throughout the specification of the present invention, when a part is referred to as "including " an element, it is understood that it may include other elements as well, without excluding other elements unless specifically stated otherwise.

The terms "about "," substantially ", etc. used to the extent that they are used throughout the present disclosure are used in their numerical value or in close proximity to their numerical values when the manufacturing and material tolerances inherent in the stated meanings are presented, Accurate or absolute numbers are used to prevent unauthorized exploitation by unauthorized intruders of the referenced disclosure. The word " step (or step) "or" step "used in the specification of the present invention does not mean" step for.

In this specification, the term " part " includes a unit realized by hardware, a unit realized by software, and a unit realized by using both. Further, one unit may be implemented using two or more hardware, or two or more units may be implemented by one hardware. In the present description, some of the operations or functions described as being performed by a terminal, a device, or a device may be performed instead in a server connected to the terminal, device, or device. Likewise, some of the operations or functions described as being performed by the server may also be performed in a terminal, device or device connected to the server. Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a diagram illustrating an interworking system for supporting the environment of the object Internet using CoAP in Zigbee communication according to an embodiment of the present invention. Referring to FIG.

1, the interworking system includes a sensor node 100 and a gateway 110 connected to each other through a non-IP communication system, for example, a Zigbee communication system, and a gateway 110 connected to the gateway 110 through a communication network such as the Internet 120 And may include a web server 130.

The sensor node 100 may output the sensor value through sensing of the surroundings or may be controlled according to an external control request through the gateway 110. [ For this, the sensor node 100 may include a protocol stack having a plurality of layers. Specifically, the protocol stack of the sensor node 100 has a physical layer (PHY layer) and a link layer (Mac sub-layer), and may have a ZigBee network layer and an application layer as an upper layer of the link layer.

In particular, the protocol stack of the sensor node according to the embodiment of the present invention includes CoAP (CoAP) between the ZigBee network layer and the application layer to support communication with the gateway 110, Layer. ≪ / RTI > Specifically, the sensor node 100 receives data converted from the gateway 110 to CoAP, for example, data for requesting a sensor value and control parameters for control through zigbee communication, To the gateway 110 via communication.

The gateway 110 is connected to the sensor node 100 by the Zigbee communication method and is connected to the web server 130 by using the virtual IP address assigned to the sensor node 100. Based on the request of the web server 130, An interworking device for controlling the node 100 or receiving a sensor value from the sensor node 100 and transmitting the sensor value to the web server 130. The interworking device includes a web server 130 and a specific sensor node 100), and transmits a request for a sensor value or data in a control request to a form suitable for a CoAP, and transmits the converted data to a specific sensor node 100 through zigbee communication have.

To this end, the protocol stack of the gateway 110 may include a CoAP layer, a ZigBee network layer, a ZigBee physical layer, and a link layer sequentially defined from the lower layer for the Zigbee communication with the sensor node 100. The protocol stack of the gateway 110 may include an Ethernet layer, a UDP / IP layer, and a CoAP layer sequentially defined from a lower layer for communication with the web server 130.

Meanwhile, the protocol stack of the gateway 110 may further include an application layer for converting data, for example, a request message, to the uppermost layer.

The web server 130 may transmit a request message including a request, for example, data through an IP-based communication with the gateway 110, and may receive a response to the request message. Specifically, the web server 130 manages the virtual IP address and the information of the sensor node 100 allocated to the sensor node 100, and transmits a control request or sensor value request to the specific sensor node 100, The gateway 100 may transmit a request message to the gateway 110 using the virtual IP address assigned to the node 100 and receive a response to the request message.

Meanwhile, the web server 130 transmits a request message to the gateway 110 in a Get manner, and receives a response to the request message.

The detailed configuration of the gateway 110 as described above will be described with reference to FIG.

2 is a block diagram illustrating a detailed configuration of a gateway 110 according to an embodiment of the present invention.

2, the gateway 110 may include a CoAP processor 200, an RF module 210, a TCP / IP module 220, and the like.

The CoAP processor 200 allocates a virtual IP address to the sensor nodes 100 connected to the ZigBee communication in order to support the object Internet environment using the CoAP, maps the allocated virtual IP address and the information of the sensor node 100 The table 205 can be generated and managed.

The CoAP processor 200 may transmit information in the table 205 to the web server 130 so that the web server 130 can control the specific sensor node 100 based on the IP communication.

Meanwhile, when a request for the specific sensor node 100 using the virtual IP address is received from the web server 130, the CoAP processor 200 transmits data including request data, for example, data for requesting a sensor value, and control parameters CoAP, and transmit it to the sensor node 100 corresponding to the virtual IP address through the RF module 210.

The CoAP processor 200 receives the sensor value from the sensor node 100 through the RF module 210 and converts the sensor value into a form suitable for the CoAP. The converted sensor value is transmitted to the TCP / IP module 220 To the web server 130.

The RF module 210 connects the gateway 110 to the sensor node 100 through Zigbee communication and transmits data converted into a form suitable for the CoAP to the sensor node 100 or a sensor Value to the CoAP processor 200. < RTI ID = 0.0 >

The TCP / IP module 220 provides the CoAP processor 200 with a control or sensor value request for the specific sensor node 100 through analysis of the received request message through communication with the web server 130, The CoAP processor 200 converts the converted data into a form suitable for HTTP and transmits the converted data to the web server 130.

A process of controlling the specific sensor node 100 by the interworking system as described above will be described with reference to FIG.

3 is a flowchart illustrating a process of the gateway 110 controlling a specific sensor node 100 according to an embodiment of the present invention.

3, the gateway 110 receives a request using the virtual IP address assigned to the specific sensor node 100 from the web server 130 (S300).

Accordingly, the gateway 110 extracts the information of the sensor node 100 corresponding to the virtual IP address, for example, the network ID of the sensor node 100, using the CoAP processor 200, (S302).

Then, the gateway 110 sets the network ID of the sensor node 100 as a destination address, and transmits the wireless signal including the converted data through the RF module 210 (S304).

Accordingly, the gateway 110 receives "Ask ", e.g., a control result or sensor value for the wireless signal from the sensor node 100 having the network ID (S306).

The gateway 110 converts the control result or sensor value into a form suitable for the CoAP using the CoAP processor 200 and provides the TCP / IP module 220 with the TCP / IP module 220. The TCP / The result or the sensor value is generated in a form suitable for HTTP communication, that is, the web server 130 is set as the destination address, and the control result or the sensor value is used as the data, and then the packet is transmitted to the web server 130 (S308).

Meanwhile, the sensor node transmits the CoAP data generated by the CoAP layer to the gateway through the Zigbee communication. In the gateway, the Zigbee protocol stack like the sensor node is placed and the data sent from the sensor node is received in CoAP format.

 The control method for controlling the sensor node 100 as described above may also be implemented in the form of a recording medium including instructions executable by a computer such as a program module executed by a computer. Computer readable media can be any available media that can be accessed by a computer and includes both volatile and nonvolatile media, removable and non-removable media. In addition, the computer-readable medium may include both computer storage media and communication media. Computer storage media includes both volatile and nonvolatile, removable and non-removable media implemented in any method or technology for storage of information such as computer readable instructions, data structures, program modules or other data. Communication media typically includes any information delivery media, including computer readable instructions, data structures, program modules, or other data in a modulated data signal such as a carrier wave, or other transport mechanism.

It will be understood by those skilled in the art that the foregoing description of the present invention is for illustrative purposes only and that those of ordinary skill in the art can readily understand that various changes and modifications may be made without departing from the spirit or essential characteristics of the present invention. will be. It is therefore to be understood that the above-described embodiments are illustrative in all aspects and not restrictive. For example, each component described as a single entity may be distributed and implemented, and components described as being distributed may also be implemented in a combined form.

The scope of the present invention is defined by the appended claims rather than the detailed description and all changes or modifications derived from the meaning and scope of the claims and their equivalents are to be construed as being included within the scope of the present invention do.

100: sensor node
110: Gateway
120: Internet
130: Web server
200: CoAP processor
210: RF module
220: TCP / IP module

Claims (9)

A sensor node in which a ZigBee physical layer for ZigBee communication, a ZigBee link layer, and a ZigBee network layer are defined, a CoAP layer for cooperating with a CoAP environment is defined,
A ZigBee link layer, a ZigBee network layer, and a CoAP layer for the ZigBee communication for the ZigBee communication compatible with the sensor node, and an Ethernet layer, a UDP / IP layer for communication with the web server connected through the IP- An IP layer and a CoAP layer are defined, and after assigning a virtual IP address to the sensor node, receiving a request based on a virtual IP address from the web server, converting the request into a form suitable for CoAP, To a sensor node connected via a ZigBee communication, and converting the data received from the sensor node into a form suitable for the CoAP and transmitting the converted data to the web server.
1. A linking device for linking a sensor node having a Zigbee physical layer for ZigBee communication, a ZigBee link layer, a ZigBee network layer, a CoAP layer, and an application layer with a web server using an HTTP protocol,
An interworking device for interworking a sensor node having a Zigbee physical layer for ZigBee communication, a ZigBee link layer, a ZigBee network layer, a CoAP layer, and an application layer with a web server using HTTP protocol, A ZigBee physical layer, a link layer, a ZigBee network layer and a CoAP layer,
An Ethernet layer, a UDP / IP layer and a CoAP layer for communication via the HTTP protocol with the web server,
And an application layer for converting a request received from the web server into a form suitable for the CoAP or converting data received from the sensor node into a form suitable for the CoAP.
3. The method of claim 2,
The interlocking device comprises:
A CoAP processor which manages a table storing data in which the virtual IP address and the information of the sensor node are mapped and converts the request or the received data into a form suitable for CoAP;
And a controller for generating a radio signal based on the request converted by the CoAP processor and transmitting the generated radio signal to a sensor node corresponding to the information of the sensor node mapped to the virtual IP address, An RF module for receiving received data and providing the received data to the CoAP processor;
Analyzes the request received from the web server by performing communication with the web server, generates a packet for communication with the web server based on the data converted by the CoAP processor, and transmits the packet to the web server Interworking device between ZigBee and CoAP, including TCP / IP module.
3. The method of claim 2,
The request includes:
And a request message for receiving the sensor value sensed by the sensor node.
3. The method of claim 2,
The request includes:
And a linkage between the ZigBee and the CoAP, which is a Get-type request message including control parameters for controlling the sensor node.
A sensor node having a Zigbee physical layer for ZigBee communication, a ZigBee link layer, a ZigBee network layer, a CoAP layer, and an application layer, and a ZigBee physical layer, a link layer, a ZigBee network layer, and a CoAP layer for Zigbee communication with the sensor node A method for controlling a sensor node in an interworking device including an Ethernet layer, a UDP / IP layer and a COAP layer for communication via the HTTP protocol with the web server and an application layer for data conversion in an uppermost layer, ,
Assigning a virtual IP address to the sensor node, mapping the allocated virtual IP address and information of the sensor node to generate a table, and providing the table to the web server;
Receiving a request based on a virtual IP address in a table from the web server;
Extracting a virtual IP address through analysis of the request and converting the data in the request into a form suitable for CoAP;
Transmitting the converted in-request data to a sensor node corresponding to information of a sensor node mapped to the extracted virtual IP address,
And receiving the data from the sensor node, converting the received data into a form suitable for CoAP, and transmitting the converted data to the web server.
The method according to claim 6,
Wherein the receiving the request comprises:
And controlling the sensor node using the interworking device between the ZigBee and the CoAP to receive the Get-type request message for receiving the sensed sensor value from the sensor node.
The method according to claim 6,
Wherein the receiving the request comprises:
And a control method for controlling the sensor node using the interworking device between the ZigBee and the CoAP receiving the Get-type request message including the control parameter for controlling the sensor node.
The method according to claim 6,
Wherein the step of transmitting to the sensor node comprises:
A control method of a sensor node using an interlock device between a ZigBee and a CoAP for generating a wireless signal based on a request converted by the CoAP processor and transmitting the generated wireless signal to a sensor node corresponding to the sensor node mapped to the virtual IP address .
KR1020160071075A 2016-04-29 2016-06-08 APPARATUS FOR COMPATIBILITY BETWEEN ZIGBEE AND CoAP KR20170124055A (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20180031520A (en) * 2016-09-20 2018-03-28 한림대학교 산학협력단 Gateway and group communications method using the same
CN109257272A (en) * 2018-09-07 2019-01-22 华南理工大学广州学院 A kind of Ethernet radio network gateway based on ZigBee
KR20190062921A (en) * 2017-11-29 2019-06-07 국민대학교산학협력단 Underwater communication apparatus using seamless DTN (Delay Tolerant Network) protocol and method thereof
CN112202732A (en) * 2020-09-14 2021-01-08 中标慧安信息技术股份有限公司 Protocol conversion method for ZigBee access to Ethernet
CN112423410A (en) * 2020-12-09 2021-02-26 广州视声智能股份有限公司 KNX and Zigbee fuse equipment

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20180031520A (en) * 2016-09-20 2018-03-28 한림대학교 산학협력단 Gateway and group communications method using the same
KR20190062921A (en) * 2017-11-29 2019-06-07 국민대학교산학협력단 Underwater communication apparatus using seamless DTN (Delay Tolerant Network) protocol and method thereof
CN109257272A (en) * 2018-09-07 2019-01-22 华南理工大学广州学院 A kind of Ethernet radio network gateway based on ZigBee
CN112202732A (en) * 2020-09-14 2021-01-08 中标慧安信息技术股份有限公司 Protocol conversion method for ZigBee access to Ethernet
CN112202732B (en) * 2020-09-14 2021-07-27 中标慧安信息技术股份有限公司 Protocol conversion method for ZigBee access to Ethernet
CN112423410A (en) * 2020-12-09 2021-02-26 广州视声智能股份有限公司 KNX and Zigbee fuse equipment

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