KR100459178B1 - Network system and communication method of the same - Google Patents

Abstract

The present invention relates to a network system and a communication method for reducing a communication waiting time and preventing a communication failure from occurring by responding first according to a corresponding command. Transmitting to the receiving side, receiving the data at the receiving side and determining the type by using the type information for each command, and sending a response signal to the transmitting side and processing of the received data command according to the type determined at the receiving side. Determining the order of execution reduces the latency of the response, thereby improving the efficiency of the system, and preventing the occurrence of communication errors, thereby improving the reliability of the system.

Description

Network system and communication method of the same

The present invention relates to a network system, and more particularly, to a network system and a communication method thereof.

In the early stages of home automation, which automatically controlled home appliances at home or remotely, each device was controlled by telephone or infrared rays. A home network system is being commercialized by establishing a network between home appliances using a communication means and having a controller for controlling the network.

Looking at the schematic configuration of such a conventional home network system, as shown in Figure 1, a number of products in the home, that is, household appliances such as refrigerators, air conditioners, microwave ovens, washing machines, personal computers (PC) are connected through a communication bus The home network is formed.

1 is a case in which the microcomputers of the respective products have a serial communication function and are directly connected to the communication bus, and the microcomputers of the respective products do not have the serial communication function or when the power line is used as a communication line, separate for each product. The home network can be configured by installing the communication module.

The controller can be designated to control the network of the home network configured as described above. Since most households have a personal computer, an application program for controlling the network is provided to the personal computer without a separate controller. It can be operated as a network controller just by installing it.

The home network system according to the related art configured as described above will be described with reference to FIG. 2.

For example, suppose a network consists of N products, among which product A communicates with product B.

First, the user inputs a product B control command using the product A (S21). That is, product A, for example, product B, for example, through the input means such as a keyboard, mouse key panel, and the like to control the product (Graphic User Interface) screen of the electronic product having a monitor or display device associated with a personal computer Enter the washing instruction of the washing machine.

Subsequently, the product A transmits the control command input by the user to the product B (S22). That is, the control means of the product A controls its own transmission means (e.g., LAN / RS 232-C) or externally linked transmission means (e.g., power line communication modem) to control the user input. Is modulated to fit the communication line and then transmitted.

The product B receives the control command transmitted from the product A (S23).

Subsequently, the product B performs an operation corresponding to the control command (S24). That is, the control means of the product B recognizes the control command code according to the algorithm programmed at the time of manufacture and performs the corresponding operation.

The product B transmits the response data indicating that the product B has executed the control command (S25).

Subsequently, the product A receives the response data transmitted from the product B (S26), recognizes that the control command is normally performed, and performs the following operation.

On the other hand, if the response data is not received for a predetermined time (Tw), it performs an operation such as retransmitting a control command or ending communication.

Therefore, if the time required to execute the command is greater than the predetermined time (Tw), the product B must first perform a response before the command is performed, so that the predetermined time (Tw) is sufficiently long to receive a response regardless of the command execution time. In this case, there is a disadvantage that the waiting time for the response is too long in the device which sent the command.

In addition, according to the time required for execution, the instruction can be classified into the type that requires relatively short execution time and the type that requires long execution time.

In this case, as described above for a command requiring a relatively short execution time, there is a problem that the communication itself cannot be made when communicating in a manner of responding after performing the command.

As such, as a representative example of the command requiring a short execution time, in the case of the transmission rate change command shown in FIG. 3, the product B is required to change the transmission rate to 9600bps while the product A is set at 2400bps. Upon receiving the command, the product B receives the command of the product A, first changes its data transmission rate to 9600bps, and then transmits response data indicating that it has changed to 9600bps at the changed 9600bps rate.

However, since the product A is currently set to 2400bps, communication is lost because the product A does not receive the response data of the product B.

As another example of a command requiring a short execution time, in the case of the communication address change command shown in FIG. 4, the product A has a sender address of '0' and a receiver address of '1'. When requesting to change to 'product B', Product B receives an address change command from Product A and changes its address to '2'. Product B then transmits the response data to product A with the sender address '2' and the receiver address '0'.

However, since the product A has address '1' of the product that sent the command, the product A ignores the response data from the product whose address is '2' and communication cannot be performed.

The network system according to the prior art has the following problems.

First, the time required for executing the command is set too long, so that the device that sent the command waits for a response.

Second, since the response is transmitted after the command is executed, in case of a command having a short execution time, communication cannot be performed because the response is not received due to the change of the setting contents according to the command execution.

Accordingly, the present invention has been made in order to solve the above-mentioned problems, a network system and a communication method for reducing the response waiting time and the response is performed first according to the command to prevent the occurrence of communication failure in advance. The purpose is to provide.

1 is a block diagram showing the configuration of a home network system according to the prior art.

2 is a flowchart illustrating a communication method of a home network system according to the related art.

3 is a diagram showing an example of communication in FIG. 2;

4 is a diagram showing another communication example of FIG.

5 is a block diagram showing the configuration of the first embodiment of a home network system according to the present invention.

6 is a flowchart showing a first embodiment of a communication method of a home network system according to the present invention;

7 is a block diagram showing the configuration of a second embodiment of a home network system according to the present invention.

8 is a flowchart showing a second embodiment of a communication method of a home network system according to the present invention.

Explanation of symbols for main parts of the drawings

10, 20, 30, 40, 50, 60: products

11, 21, 41, 51: Command processing program by type

12, 22, 43, 53: transmitter / receiver

13, 23, 44, 54: control unit

42, 52: Command / Type Table

In a communication method of a network system according to the present invention, the transmitting side transmits data including type information for each command preset to the receiving side, and receives the data at the receiving side and determines the type using the type information for each command. And determining the execution order of the response signal transmission to the transmitting side and the received data command processing according to the type determined at the receiving side.

The network system according to the present invention is a network system comprising at least one transmitting device having a transmitting means for determining the type of data to be transmitted, and at least one device including the transmitting device, and the data transmitted from the transmitting device. And at least one receiving side device having transmission means for transmitting a response signal in accordance with the determined response processing sequence according to the type.

Hereinafter, the first and second embodiments of a network system and a communication method thereof according to the present invention will be described in detail with reference to the accompanying drawings.

5 is a block diagram showing a configuration of a first embodiment of a home network system according to the present invention, FIG. 6 is a flowchart showing a first embodiment of a communication method of a home network system according to the present invention, and FIG. Fig. 8 is a block diagram showing the construction of a second embodiment of a home network system according to the present invention. Fig. 8 is a flowchart showing a second embodiment of a communication method of a home network system according to the present invention.

First Embodiment

As shown in FIG. 5, the network system according to the present invention basically transmits / receives except for a product capable of transmitting only or a product capable of receiving only, that is, a product A 10. And in the case of the product B (20), the transmission / reception unit 12 (22) that performs data transmission / reception operation, the type-specific command processing program (11) (21), which determines the processing order of response and command execution by type And a control unit 13, 23 for controlling the transmitting / receiving unit 12, 22 to process the data according to the type command processing program.

For convenience of description of the present invention, as shown in Figure 5, in the network consisting of the product A (10), product B (20) and product C (30) and the communication using a direct communication or power line (power line communication modem) The product A 10 is a transmitting device and the product B 10 is a receiving device.

Product A (10) having a transmission means for determining the type of data to be transmitted, networked with at least one or more devices including the product A (10) in accordance with the type of data transmitted from the product A (10) And a product B 20 having transmission means for determining a response processing order and transmitting a response signal in accordance with the determined response processing order.

At this time, the transmission means of the product A (10) is a transmission / reception unit 12 for transmitting and receiving data, and the data containing the instructions for defining the type of each command included in the data or the type already defined is the product B (20) It includes a control unit 13 for controlling the transmission / reception unit 12 to be transmitted to.

The transmission means of the product B 20 determines the response processing order according to the transmitting / receiving unit 22 for transmitting the response signal and the type of data transmitted from the product B 20 and according to the determined response processing order. And a controller 23 for controlling the transmitter / receiver 22 to transmit a response signal to the product A 10.

A communication method of a network system according to the present invention configured as described above will be described with reference to FIG.

First, a user inputs a product B 20 control command using the product A 10 (S61). That is, product A, for example, product B, for example, through the input means such as a keyboard, mouse key panel, and the like to control the product (Graphic User Interface) screen of the electronic product having a monitor or display device associated with a personal computer Enter the address change command of the washing machine.

Subsequently, the product A 10 transmits data including the control command input by the user and the type information to the product B 20 (S62). That is, the control unit 13 of the product A 10 controls its own transmitter / receiver 12 (e.g., LAN / RS 232-C) or an externally linked transmitter (e.g., power line communication modem). By modulating the data including the control command and the rectified information input by the user to fit the communication line and transmits.

At this time, the type information is for distinguishing a command that must be made before a command is executed. The type information is programmed in the operation algorithm of the controller of the product and can be changed as necessary. The type information is classified into a first type and a second type, and the first type is defined to receive data of a transmitting side from a receiving side, perform a corresponding control command first, and then transmit response data. The receiving side is defined to receive data of the transmitting side, transmit the response data first, and then perform the corresponding control command.

The product B 20 receives the data transmitted from the product A 10 (S63).

Subsequently, the product B 20 determines the type of the corresponding data by using the type information included in the received data (S64).

As a result of the determination (S64), if the first type, the product B 20 executes a command included in the data (S65), and then transmits the response data to the product A (10) (S66).

On the other hand, if the determination result (S64), the second type of product B (20) transmits the response data indicating that the data received to the product A (10) (S67), and performs the command contained in the data ( S68).

Therefore, the product A 10 receives the response data from the product B 20 (S69) and recognizes that the transmitted command has been normally performed.

Second Embodiment

In the network system according to the present invention, as shown in FIG. 7, a product capable of transmitting / receiving except for a product capable of transmitting only or a product capable of receiving only and capable of controlling other products, that is, a product A 40. And the product B 50, the transmission / reception unit 43, 53 for performing data transmission / reception operation, the type-specific command processing programs 41 and 51 for determining the processing order of response and command execution for each type. The command / type table (42) (52) in which the type of command is defined, and the received data are compared with the command / type table (42) (52) to determine the type and process the data according to the command processing program for each type. And control units 44 and 54 for controlling the receiving units 43 and 53.

For convenience of description of the present invention, the product A (40) in the network consisting of product A (40), product B (50) and product C () and a direct communication or communication using a power line (power line communication modem) is The configuration is limited to the transmitting device and the product B 50 is the receiving device.

A product A 40 having a transmission means for transmitting data and a network with at least one or more devices including the product A 40 determine the type of data transmitted from the product A 40 and determine the type of data. And a product B 50 having transmission means for determining a response processing sequence according to the response processing sequence and transmitting a response signal according to the determined response processing sequence.

At this time, the transmission means of the product B 50 compares and determines the type of data according to a predetermined criterion with the transmitting / receiving unit 53 which transmits / receives data, and determines the response processing order according to the determined type to respond. And a controller 54 for controlling the transmitter / receiver 53 so that signals are transmitted in the corresponding order.

A communication method of a network system according to the present invention configured as described above will be described with reference to FIG. 8.

First, a user inputs a product B 50 control command using the product A 40 (S81). That is, product A, for example, product B, for example, through the input means such as a keyboard, mouse key panel, and the like to control the product (Graphic User Interface) screen of the electronic product having a monitor or display device associated with a personal computer Enter the address change command of the washing machine.

Subsequently, the product A 40 transmits data including the control command input by the user to the product B 50 (S82). That is, the controller 44 of the product A 40 controls its own transmitter / receiver 43 (e.g., LAN / RS 232-C) or an externally linked transmitter (e.g., a power line communication modem). And modulate the data including the control command input by the user to fit the communication line and transmit the data.

The product B 50 receives the data transmitted from the product A 40 (S83).

Command (command code) Command type One The first kind 2 The first kind … … … … … … N The second kind

Subsequently, the product B 50 compares the command of the received data with the command / type table shown in Table 1 to determine the command type of the corresponding data (S84).

At this time, the command / type table is stored in the controller of the corresponding product or in a separate memory, and is for distinguishing a command that should be responded first before executing the command. In this case, the first type is defined to receive data of the sender at the receiving end, perform a corresponding control command first, and then transmit response data. After sending, it is defined to execute the corresponding control command.

As a result of the determination (S84), if the first type, the product B (50) performs a command included in the data (S85), and then transmits the response data to the product A (40) (S86).

On the other hand, if the determination result (S84), the second type, the product B (50) transmits the response data indicating that the data received to the product A (40) (S87), and performs the command contained in the data ( S88).

Therefore, the product A 40 receives the response data from the product B 50 (S89) and recognizes that the transmitted command has been normally performed.

The network system and its communication method according to the present invention have the following effects.

First, the response is first performed according to the data and the corresponding command is executed, thereby reducing the response waiting time and improving the efficiency of the entire system.

Second, if a command is executed first, a response to a command that may generate a communication error is first performed to prevent a communication error from occurring, thereby improving reliability of the network system.

Third, the present invention can be applied to all types of network systems because the system can be built by simple programming and memory writing, and its use is wide. Especially, a home network system in which a small amount of data communication is performed compared to a general mass communication network. When applied to can maximize the effect.

Claims (27)

In the communication method of a network system in which at least two devices are linked, A data type determining step of determining a type of data transmitted from at least one of the two or more devices, And a response signal processing order determining step for determining a response signal processing order according to the type of data received at the data receiving side. According to claim 1, And the data includes a command to perform a predetermined operation at a corresponding receiving side. The method of claim 2, The command is a communication method of a network system, characterized in that the receiving device requires a certain time to complete a certain operation. According to claim 1, And determining the type of data at the transmitting side and transmitting the data type to the receiving side. The method of claim 4, wherein And the data transmitted from the transmitting side includes information indicating a response order of the corresponding data. According to claim 1, The data type determining step is a communication method of a network system, characterized in that for determining the type of data transmitted from the transmitting side. The method of claim 6, The determining of the type of the data transmitted from the transmitting side at the receiving side may be performed after the response according to the type and the operation according to the contents of the data are performed after a response to the transmission. And determining one of a kind of response to the network system. According to claim 1, The response signal processing order determining step may include: a comparison determination step of determining a data type by comparing a received data with a type of pre-stored data; Transmitting a response signal for the data transmitted from the transmitting side when the response is the first data type to be performed in the comparison determination step; And performing an operation specified in the data transmitted from the transmitting side. In the communication method of the network system, Transmitting, by the transmitting side, data including the type information for each command to the receiving side; Receiving the data at a receiving side and determining the type using the type information for each command; And determining the execution order of the response signal transmission to the transmitting side and the received data command processing according to the determined type at the receiving side. The method of claim 9, And setting the type information of each command for data transmission and the response signal processing order for each type of data reception for each device. The method of claim 9, If the determined type is a first type, response signal transmission is first performed; and if the second type is a second type, a data command process is performed first. The method of claim 11, wherein The first type defines a case in which the priority of response signal transmission is higher than the priority of command execution, and the second type defines a case in which the priority of command execution is higher than the priority of response signal transmission. System communication method. In the communication method of the network system, Transmitting data including a predetermined command from a transmitting side to a receiving side, Receiving the data at a receiver and determining the type of the data by referring to a preset command / type table; And determining the execution order of the response signal transmission to the transmitting side and the received data command processing according to the determined type at the receiving side. The method of claim 13, And setting a command / type table for receiving data processing and a response signal processing order for each type of received data processing for each device. The method of claim 13, If the determined type is a first type, response signal transmission is first performed; and if the second type is a second type, a data command process is performed first. The method of claim 15, The first type defines a case in which the priority of response signal transmission is higher than the priority of command execution, and the second type defines a case in which the priority of command execution is higher than the priority of response signal transmission. System communication method. At least one transmitting side apparatus having transmitting means for determining the type of data to be transmitted, And a transmitting means for establishing a network with at least one device including the transmitting device, determining a response processing order according to the type of data transmitted from the transmitting device, and transmitting a response signal according to the determined response processing order. A network system comprising at least one receiving side device. The method of claim 17, And the data transmitted from the sending device includes a command to perform a certain operation in the receiving device. The method of claim 18, The command is that the receiving device needs a certain time to complete a certain operation. The method of claim 17, And the data transmitted from the transmitting device includes the kind information of the data. The method of claim 17, The transmitting means of the transmitting device includes a transmitting unit for transmitting data; And a controller configured to control the transmitter to define a data type or to transmit data of which the type is already defined to the receiving device. The method of claim 17, The transmitting means of the receiving device includes a transmitting unit for transmitting a response signal; And a control unit for determining a response processing sequence according to the type of data transmitted from the transmitting device and controlling the transmitting unit to transmit a response signal to the transmitting side according to the determined response processing sequence. At least one transmitting side device having a transmitting means for transmitting data, Form a network with at least one device including the transmitting device, determine the type of data transmitted from the transmitting device, determine the response processing order according to the type, and transmit the response signal according to the determined response processing order. And at least one receiving side device having a transmitting means. The method of claim 23, wherein And wherein the transmitted data includes a command to perform a certain operation at a receiving device. The method of claim 23, wherein The command is that the receiving device needs a certain time to complete a certain operation. The method of claim 23, wherein The transmitting means of the receiving device includes a transmitting unit for transmitting data; And a control unit for comparing and determining the type of data according to a predetermined criterion and determining the response processing order according to the determined type to control the transmitting unit to transmit the response signal in the corresponding order. The method of claim 26, The predetermined criterion is stored in the control unit or a separate memory in a table form defining a type of each command.