KR20060093588A - Control method of home-network system - Google Patents

Abstract

The present invention is to control any home appliance in a home network system, to this end, the present invention, a conventional method for transmitting and receiving only data when controlling a home appliance using a ZigBee in a home network system connected to a plurality of home appliances Unlike, when a mobile server of a home network system in which a plurality of home appliances are connected, a key input for controlling any home appliance is generated, a connection confirmation message including a first sequence code is generated and transmitted to the corresponding home appliance. After analyzing the connection confirmation message and checking the corresponding sequence code, a response message including the next prescribed sequence code corresponding to the corresponding sequence code is generated and transmitted to the mobile server. After checking that sequence code, the corresponding sequence code corresponding to the next sequence code By generating a request message including an order sequence code and transmitting the request message to the corresponding home appliance as many times as necessary to control the operation of the home appliance, the messages including the respective sequence codes defined in the home network system are repeated. By transmitting, you can effectively solve security problems.

Description

Control method of home network system {CONTROL METHOD OF HOME-NETWORK SYSTEM}

1 is a block diagram of a home network system for controlling a plurality of home appliances using ZigBee according to the present invention;

2 is a block diagram illustrating a mobile server-side first ZigBee module unit in a home network system that controls a plurality of home appliances using ZigBee according to the present invention;

3 is a block diagram of an arbitrary home appliance-side second ZigBee module unit in a home network system that controls a plurality of home appliances using ZigBee according to the present invention;

4 is a diagram illustrating a message structure including an arbitrary sequence code in a home network system that controls a plurality of home appliances using ZigBee according to the present invention;

5 is a flowchart illustrating a process of controlling a plurality of home appliances using ZigBee in a home network system according to an embodiment of the present invention.

<Description of the symbols for the main parts of the drawings>

100: internet 102: removable server

104: ZigBee 106 / 1-106 / N: home appliances

200: first ZigBee module unit 202: key input unit

204: First control unit 206: First transmission / reception unit

208: display unit 300: second ZigBee module unit

302: second transmission and reception unit 304: second control unit

The present invention relates to a method of controlling a home appliance in a home network system, and more particularly, to a control method of a home network system suitable for controlling a home appliance using ZigBee in a home network system to which a plurality of home appliances are connected. will be.

As is well known, early home networking meant a range of home automation and home control systems that automatically controlled home security, lighting, and temperature.

Since then, as the number of households with multiple PCs and peripherals in a home has increased, networking technologies have emerged to connect them efficiently, and the Home Networking Kit has been introduced to support them. It began to be used in earnest.

In addition, with the development of advanced transmission media technologies such as telephone lines, power lines, and wireless, and broadband networks of subscriber networks such as DSL and Cable Modem, the high-speed Internet is rapidly expanding, and not only PCs but also various digital information terminals have appeared in homes. Intelligent communication is now possible by providing access to the external Internet network as well as providing a path through which digital information can exchange data between electrical devices.

Meanwhile, in a home network system that controls a plurality of wirelessly connected home appliances, a plurality of home appliances in the home are wirelessly connected using protocols such as Bluetooth, HomeRF, and wireless 1394. Control home appliances.

Here, Bluetooth is a low-power, low-cost wireless communication technology, started for the purpose of replacing wireless wired cable complex, and is used for transmitting and receiving multimedia data between devices such as personal digital devices, personal mobile communication devices, computers, etc. HomeRF uses the Wireless Wireless Access Protocol (SWAP) to access the wireless Internet access in the home using the 2.4 GHz frequency band, cordless telephones, FAX, automatic routing to family members' voice mailboxes, and voice accumulated on cordless terminals. Wireless 1394 is a wireless application of wired IEEE1394 technology. It connects digital home appliances such as PC, HDTV, home theater, and digital camcorder, which are terminal devices of a home network, to a single network. It can be applied to construct a network.

In recent years, a technology for applying ZigBee, which has features such as lower price, longer transmission distance, lower data rate, and lower power, compared to Bluetooth, and which can be applied to a plurality of network topologies, is being developed.

Here, ZigBee is a standardized work based on IEEE 802.15.4, which is a short-range wireless method, and simplifies the configuration of a wireless transmit / receive circuit by adopting a simple modulation method based on a direct spread spectrum technology. 250 kbps, 1 It uses less than mW transmit power and supports 16 channels in the 2.4 GHz frequency band to accommodate more users in the same band.

In addition, ZigBee operates based on an 8-bit microcontroller and the communication mode is based on master-slave, but it is possible to do point-to-point networking called 'Mesh Mode' and coordinator a device in the network. By minimizing power consumption by adopting a method of changing nodes in sleep mode to active state only when sending / receiving activity is required.

On the other hand, when controlling any home appliance using ZigBee in a home network system including a plurality of home appliances connected wirelessly, messages transmitted and received for operation control between the server side and any home appliance are malicious from outside If it is changed for the purpose, it causes a serious risk, and if only the request message sent from the server side to any home appliance is encrypted in the home, the same request message is more likely to cause an operation error of another home appliance. It has not been suggested yet.

Accordingly, the present invention is to solve the above problems of the prior art, when controlling a home appliance using a ZigBee in a home network system connected to a plurality of home appliances necessary for operation control in the mobile server and the home appliance It is an object of the present invention to provide a control method of a home network system that can solve a security problem by checking each sequence code transmitted after generating and transmitting messages including each sequence code.

In order to achieve the above object, the present invention provides a method for controlling the operation of a home appliance in a home network system to which a plurality of home appliances are connected, and includes a first sequence code when there is a key input for controlling any home appliance in a mobile server. A first process of generating a connection confirmation message including the first message and transmitting the same to the home appliance; a second process of analyzing the transmitted connection confirmation message and checking a corresponding sequence code; A third process of generating a response message including an order sequence code and transmitting the generated response message to the mobile server, a fourth process of analyzing the transmitted response message and checking a corresponding sequence code, and corresponding to the next sequence code Generating a request message including a prescribed next sequence code and transmitting the request message to the home appliance; Provided is a control method of a home network system including a sixth process of repeatedly performing the second to fifth processes as many times as necessary for controlling the operation of a home appliance.

The above and other objects and various advantages of the present invention will become more apparent from the preferred embodiments of the present invention described below with reference to the accompanying drawings by those skilled in the art.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

A key technical aspect of the present invention is to provide a home network system in which a plurality of home appliances are connected, unlike a conventional method of transmitting and receiving data only when controlling a home appliance using ZigBee in a home network system to which a plurality of home appliances are connected. When the mobile server has a key input for controlling any household appliance, a connection confirmation message including the first sequence code is generated and transmitted to the household appliance, and the corresponding connection sequence message is checked by analyzing the transmitted connection confirmation message. After that, a response message including the next prescribed sequence code corresponding to the corresponding sequence code is generated and transmitted to the mobile server. The response message is analyzed and the corresponding sequence code is checked. Generate a request message containing the corresponding prescribed next sequence code to the appliance The step of transmitting to that repeated any number of times required for the operation control of the appliance, through such a technical means can easily attain the bar for the purpose of the present invention.

1 is a block diagram of a home network system for controlling a plurality of home appliances using ZigBee according to the present invention, the Internet 100, a mobile server 102, ZigBee 104 and home appliances (106 / 1-) 106 / N).

Referring to FIG. 1, the mobile server 102 stores and processes external data transmitted to a home through broadcasting, a telephone, and the Internet 100, and, as necessary, the home appliances 106/1-106 / N in the home. A mobile home server for controlling redistribution to a home, for example, a robot, etc., which is responsible for the control and management of various home appliances (106 / 1-106 / N) in the home, and two or more in the home or office. It is an information terminal that can share, control, and manage devices, software, and storage devices by integrating computers or home appliances.

In addition, ZigBee 104 is a communication protocol that connects and transmits and receives control data between the mobile server 102 and the home appliance 106 / 1-106 / N in a home network system, which is cheaper than Bluetooth. Longer transmission distance, lower data rate, and low power.

In addition, the home appliances (106 / 1-106 / n) refers to a computer, a printer, a washing machine, a refrigerator, a TV, etc. existing in a home in a home network system, and are portable when transmitting and receiving control data with the mobile server 102. Control data is transmitted and received from the server 102 through the ZigBee (104).

FIG. 2 is a block diagram illustrating a mobile server-side first ZigBee module unit in a home network system which controls a plurality of home appliances using ZigBee according to the present invention. The first ZigBee module unit 200, a key input unit 202, A first control unit 204, a first transceiver 206 and a display unit 208, Figure 3 is any home appliance in a home network system that controls a plurality of home appliances using ZigBee according to the present invention A block configuration diagram of a side second ZigBee module unit includes a second ZigBee module unit 300, a second transceiver unit 302, and a second control unit 304.

2 and 3, the key input unit 202 is for generating an operation signal for controlling the mobile server 102 and the home appliances 106 / 1-106 / n. For example, the mobile server ( Input through the keypad, a remote controller, and the like provided in 102. These manipulation signals are transmitted to the first control unit 204 of the first ZigBee module unit 200 on the mobile server 102 side.

In addition, the first control unit 204 performs a general operation control of the mobile server 102 including, for example, a microprocessor, and when the control operation signal is transmitted from the key input unit 202, the corresponding control unit accordingly. After generating the connection confirmation message including the sequence code, it is encrypted and transmitted to the first transceiver 206.

In addition, a response message from the second ZigBee module unit 300 of the home appliance (106 / 1-106 / n) transmitted from the first transmitter 206 is received and analyzed, and the corresponding sequence code is checked to normal order. In the case of a column code, a request message (that is, a control command for controlling the operation of the home appliance) including a next sequence code corresponding to the sequence code is generated, and then encrypted and transmitted to the first transmitter 206. In response to an error message from the second ZigBee module unit 300 of the home appliance 106 / 1-106 / n transmitted from the first transmitter 206, a control signal for displaying this is provided to the display unit 208. do.

Here, as shown in FIG. 4, the structure of the message including any sequence code includes an 8-bit sequence, an 8-bit address, an 8-bit command, and a 4-bit value. It consists of a value type and an 8-bit value. Here, the sequence code means a sequence and an address.

The sequence is a sequence that increases according to the communication order between the home appliances 106 / 1-106 / N and the mobile server 102, and each home appliance 106 is included in the home appliances 106 / 1-106 / N. The sequence that defines / 1-106 / N) is stored, respectively, and the mobile server 102 stores all the sequence that defines all the home appliances 106 / 1-106 / N. The address refers to a code of the home appliance 106 / N, and the command refers to control data and data transmitted to the home appliance 106 / N. The value type indicates the type of value field.

After generating a message having this structure, the message is encrypted using a public key or symmetric key encryption method and then transmitted to the first transceiver 206.

In addition, the first transceiver unit 206 is connected to the home appliance (106 / 1-106 / N) side and the Universal Asynchronous Receiver Transmitter (UART) interface to the second home ZigBee module (106 / 1-106 / N) side. Perform wireless communication through the second transceiver 302 of the unit 300, transmit a connection confirmation message, a request message, etc. from the first controller 204, and the home appliance 106 / 1-106 / N A response message, an error message, and the like from the second ZigBee module unit 300 are received and transmitted to the first control unit 204.

On the other hand, the display unit 208 displays an error message or the like on the home appliance 106 / 1-106 / N side in accordance with a control signal from the first control unit 204 through means such as a liquid crystal panel. Here, of course, the error message can be output through the speaker.

The second transceiver 302 of the second ZigBee module 300 is connected to the mobile server 102 through wireless communication with the first transceiver 206 of the first ZigBee module 200 of the mobile server 102. The first ZigBee module 200 receives a connection confirmation message, a request message, and the like from the second ZigBee module 200 to the second control unit 304, and transmits a response message, an error message, and the like from the second control unit 304.

In addition, the second control unit 304 performs overall operation control of the home appliance 106 / 1-106 / N including, for example, a microprocessor, and is provided from the second transmission / reception unit 302. Receive and analyze the connection confirmation message and the request message to check the corresponding sequence code, and if it is a normal sequence code, generates a response message including the next sequence code corresponding to the sequence code, encrypts it, and then 2 transmits to the transceiver 302 or controls the home appliance 106 / 1-106 / N according to the request message, generates an error message if it is not a normal sequence code, and encrypts the second transceiver. Forward to 302.

Next, when controlling any home appliance using ZigBee in the home network system having the above-described configuration, generates and transmits a message including each sequence code between the mobile server and the home appliance, Analyzing this, the corresponding sequence code will be checked, and if a normal sequence code is described, a process of controlling an arbitrary household appliance will be described.

5 is a flowchart illustrating a process of controlling a plurality of home appliances using ZigBee in a home network system according to an embodiment of the present invention.

Referring to FIG. 5, in the standby mode of a home network system in which a plurality of home appliances 106 / 1-106 / n are wirelessly connected (step 502), the first ZigBee module unit 200 of the mobile server 102 may be configured. The first control unit 204 checks whether there is an operation signal generated from the key input unit 202 when the user inputs a control key through an input unit (not shown), for example, a keypad or a remote controller (step 504). .

In addition, the first controller 204 generates a connection confirmation message including the first sequence code, encrypts it using an encryption method such as a symmetric key, a public key method, and then, via the first transceiver 206. The second transmission / reception unit 302 of the second ZigBee module unit 300 of the home appliance 106 / 1-106 / n is transmitted (step 506).

Here, when the response message corresponding to the connection confirmation message from the home appliance is not received for a preset time (for example, 5 seconds, 10 seconds, etc.), an error message is generated and displayed on the display unit 208. .

The second transmitter 302 receives the connection confirmation message and transfers it to the second control unit 304, and the second control unit 304 checks whether the corresponding sequence sequence code is analyzed by analyzing the transferred connection confirmation message (step 508). , 510).

If the result of the check in step 510 is a corresponding sequence code, that is, a connection confirmation message having a normal sequence code, a response message including a prescribed next sequence code corresponding to the sequence code is generated. After encrypting the data using an encryption method such as a symmetric key and a public key method, the second transceiver 302 passes through the second transceiver 302 to the first transceiver 204 of the first ZigBee module 200 of the mobile server 102. Transmit (step 512).

The first transmitter 206 receives the response message and transfers it to the first controller 204, and the first controller 204 analyzes the response message and checks whether the corresponding sequence code is present (steps 514 and 516). ).

If the result of the check in step 516 is a corresponding sequence code, i.e., a response message with a normal sequence code, the request message (i.e., includes a next defined sequence code corresponding to the sequence code) A control command for controlling the operation of the home appliance, and encrypts the same by using a symmetric key and a public key encryption method, and then the home appliance 106 / 1-106 /. n) transmits to the second transceiver 302 of the second ZigBee module unit 300 (step 518).

Thereafter, according to the request message transmitted, the second control unit 304 performs operation control of the home appliance, and the steps 508 to 518 may be performed any number of times necessary to perform such operation control. Repeat it.

On the other hand, if the result of the check in step 510 is not a corresponding sequence code, that is, if it is not a connection confirmation message having a normal sequence code, the second controller 304 includes an error message including a prescribed sequence code. And encrypt the data using an encryption method such as a symmetric key and a public key method, and then, the first transceiver of the first ZigBee module 200 of the mobile server 102 side through the second transceiver 302. Transmit to step 204 (step 520).

Next, the first transceiver 204 receives the error message and transmits it to the first controller 204. The first controller 204 analyzes the error message and displays the error message according to the corresponding sequence code. The control signal is provided to the display unit 208, thereby displaying an error message through display means such as a liquid crystal panel (step 528).

In addition, when the check result of the step 516 is not the corresponding sequence code, that is, if the response message does not have a normal sequence code, the first controller 204 analyzes the response message and then displays an error message. The control signal is provided to the display unit 208, thereby displaying an error message through display means such as a liquid crystal panel (step 528).

Therefore, when controlling a home appliance using ZigBee in a home network system to which a plurality of home appliances are connected, messages having an order sequence code defined between the mobile server side and the home appliance are encrypted, and then encrypted. By transmitting the security problem can be solved to control the home appliance.

As described above, the present invention is different from the conventional method of transmitting and receiving data only when controlling a certain home appliance using ZigBee in a home network system to which a plurality of home appliances are connected. When the mobile server has a key input for controlling any household appliance, a connection confirmation message including the first sequence code is generated and transmitted to the household appliance, and the corresponding connection sequence message is checked by analyzing the transmitted connection confirmation message. After that, a response message including the next prescribed sequence code corresponding to the corresponding sequence code is generated and transmitted to the mobile server. The response message is analyzed and the corresponding sequence code is checked. Generate a request message containing the corresponding prescribed next sequence code; By repeatedly performing the processes of transmitting the number of times necessary for controlling the operation of the home appliance, it is possible to effectively solve the security problem by transmitting the messages including the respective sequence codes defined in the home network system.

Claims (5)

A method of controlling the operation of a home appliance in a home network system to which a plurality of home appliances are connected, A first process of generating a connection confirmation message including a first sequence code and transmitting the same to the home appliance when a mobile server has a key input for controlling a home appliance; A second process of analyzing the transmitted connection confirmation message and checking a corresponding sequence code; Generating a response message including a prescribed next sequence code corresponding to the sequence code and transmitting the generated response message to the mobile server; A fourth step of analyzing the transmitted response message to check a corresponding sequence code; Generating a request message including a prescribed next sequence code corresponding to the next sequence code and transmitting the generated request message to the home appliance; A sixth process of repeating the second to fifth processes any number of times necessary for controlling the operation of the home appliance; Control method of a home network system comprising a. The method of claim 1, The control method, Displaying an error message when there is no response message for a preset time from the home appliance after performing the first step Control method of a home network system further comprising. The method of claim 1, The control method, After performing the second process, generating an error message and transmitting the generated error message to the mobile server if it is not the corresponding sequence code; Receiving and displaying the error message Control method of a home network system further comprising. The method of claim 1, The control method, After performing the fourth process, if it is not the corresponding sequence code, an error message is generated and displayed. Control method of a home network system further comprising. The method according to any one of claims 1 to 4, The control method is a control method of a home network system, characterized in that for transmitting the encrypted message.

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