KR100812929B1 - Method for construction of data packet and method for transmission and receipt of data - Google Patents

Abstract

A method for constructing a data packet and a method for transceiving data are provided to include only a valid ARG(Argument) field into the data packet according to a flag field determining the validity of the ARG field indicating a variable value of a control instruction, thereby reducing the load of a home server according to the conversion of the data packet. A method for constructing a data packet comprises the following steps of: generating at least one ARG field indicating a variable value of a control instruction; and generating a flag field indicating that the ARG field(2,5,6) is valid. The at least one ARG field indicates one of plural detailed operation states which a second device includes. The at least one ARG field is generated as much as the detailed operation states to be controlled out of the detailed operation states and is included in the data packet.

Description

Method for construction of data packet and Method for transmission and receipt of data}

1 is an exemplary diagram illustrating a home network system that uses different transmission physical media.

2 is a block diagram showing the structure of a data packet according to an embodiment of the present invention.

3 is an exemplary diagram illustrating a procedure of configuring a structure of a data packet of FIG. 2.

4 is an exemplary view showing a data transmission and reception method using a data packet according to an embodiment of the present invention.

5 is a flowchart illustrating a data transmission / reception method using a data packet according to an embodiment of the present invention.

<Description of Symbols for Main Parts of Drawings>

FLAG: Flags

ARG: argument

SC: service code

CC: command code

The present invention relates to a method for constructing a data packet and a method for transmitting and receiving data, and more particularly, using a flag (FLAG) field for determining whether an argument (ARG) field indicating a variable value of a control command is valid. The present invention relates to a method for constructing a data packet constituting an argument field region with only the argument field and a method for transmitting and receiving data packets.

Home network system is a technology that can control the home appliances, such as TV, audio, video, computer, refrigerator, washing machine, etc. installed in the home and share the content between devices using wired and wireless communication. When the home network is equipped, the user can access the home network system through a communication network and control electronic appliances in the home even from a long distance. In addition, home appliances enable Internet access, video transmission, and e-mail transmission from inside and outside the home, enabling a true cyber home.

These home network systems are connected by wired and wireless transmission physical media. Wired transmission physical media include Home Phoneline Networking Alliance (HomePNA) using telephone lines, RS-485, PLC (Power Line Communication) using power line wiring, Ethernet (Ethernet), and wireless transmission physical media. LAN, ZigBee, Bluetooth, HomeRF (Home Radio Frequency).

As such, in the home network system, a transmission physical medium for transmitting a control command for controlling and monitoring a home machine may coexist in various ways. If the transmission physical medium is different, the corresponding communication protocol is also different, and the data packet of the corresponding information is also transmitted by applying another protocol.

1 is an exemplary diagram illustrating a home network system that uses different transmission physical media.

Referring to FIG. 1, the home machines 30 and 40 of a home network system are connected through a home server 20, and the home server 20 is connected to various external service servers (not shown) to the communication network 10. Connected.

The indoor unit # 1 30 and the indoor unit # 2 40 may use different transmission physical media, and the communication protocol according to the first communication protocol 35 and the second communication protocol 45 may be different from each other. This applies.

In addition, the information exchange with the external service server is performed through the communication network 10, in general, the communication network 10 is a home server as a data packet applying the Internet standard protocol (TCP / IP, Transmission Control Protocol / Internet Protocol; 15). Exchange information with (20).

Therefore, in order to control the home office # 2 40, the data packet transmitted from the home office # 1 30 to the first communication protocol 35 and the external network 10 to the Internet standard protocol 15. One data packet should be transmitted to the home machine # 2 40 through a protocol conversion process from the home server 20 to the second communication protocol 45. The home machine # 2 40 transmits a response data packet to the second communication protocol 45 in response to the control command, and the home server 20 performs protocol conversion processing again to perform the home appliance # 1 30 and the external device. Should be transmitted to the communication network 10.

In addition, since the structure of the data packet of the control command varies between devices using the same transmission physical medium, the home server 20 must convert the data packet into an appropriate form.

As described above, as the transmission physical mediums are diversified and the number of the home machines 30 and 40 increases, the burden on the conversion of data packets increases in the home server 20.

In addition, the structure of the data packet of a certain format according to the function of the home machine (30, 40) has a problem that can not flexibly respond to the increase in the function of the home machine (30, 40).

An object of the present invention is to include a flag (FLAG) field for determining whether an argument (ARG) field indicating a variable value of a control command is valid in a data packet, thereby reducing the burden on the home server in converting the data packet. The present invention provides a method for configuring a data packet and a method for transmitting and receiving data that can flexibly respond to additional functions of a device.

In the home network system according to the present invention for achieving the above object, the structure of a data packet for transmitting a control command includes at least one argument (ARG) field and a validity of the argument field indicating a variable value of the control command. It includes a flag (FLAG) field to determine the.

The number of argument fields corresponds to the number of bits in the flag field.

The order of the argument fields corresponds to the order of the bits of the flag field. If the value of the bit is one, the corresponding argument field is valid and the value of the bit is zero. Then the corresponding argument field is invalid.

The argument field area may be configured only with the valid argument field.

In order to achieve the above object, a method of transmitting / receiving data from a first device to a second device of a home network system according to the present invention sets a flag (FLAG) field in the first device so that only the valid argument (ARRG) field is recalled. Including the data packet and transmitting the data packet; and receiving the data packet at the second device and confirming the setting of the flag field to recognize a valid argument field.

The argument field may indicate a detailed operation state of any one of the first device and the second device.

DETAILED DESCRIPTION Hereinafter, exemplary embodiments of the present invention will be described with reference to the accompanying drawings so that those skilled in the art can easily carry out the present invention.

2 is a block diagram showing the structure of a data packet according to an embodiment of the present invention.

Referring to FIG. 2, a data packet includes a start of text character (STX) field, a destination address (DA) field, a source address (SA) field, a length (LEN) field, FLAG field, service code (SC) field, command code (CC) field, argument (ARG) field, cyclic redundancy check (CRC) field and end-of-document character ( end of text character (ETX) field.

The STX field indicates that the actual message begins between the header part of the packet and the actual message, and the ETX indicates that the actual message ends. The DA field indicates the destination of the packet, and the SA field indicates the destination of the packet. The LEN field represents length information of a packet, and the CRC field is a field for detecting an error occurring in a data transmission process. The SC field represents a routine or hierarchy supporting a program, the CC field represents a control signal, and the SC field and the CC field together become a common code representing an actual control command. The ARG field is a field indicating a variable element of a control command with a variable value assigned as necessary, and the validity is determined by the FLAG field.

Here, the argument (ARG) field may be configured in plural, and the number of argument fields is determined corresponding to the number of bits of the flag FLAG field. That is, when the flag field is n bits, the data packet may have n argument fields. For example, when the flag field is 8 bits, eight argument fields may be included in the data packet.

The order of arranging the argument fields corresponds to the order of bits in the flag fields. That is, the order in which the bits of the flag field are arranged in zero or one and the order in which the argument fields are arranged in the data packet are the same. For example, if a bit in the flag field is 3 bits and the value of the bit is '010', the first '0' corresponds to the first argument field ARG (1), and the second '1' corresponds to the second argument field ARG. Corresponds to (2), and the third '0' corresponds to the third argument field ARG (3).

Here, if the value of the corresponding bit is one, the corresponding argument field is valid. If the value of the corresponding bit is zero, the corresponding argument field is invalid. That is, the argument field in which the value of the bit corresponds to one is included as a variable element of the control command, and the argument field in which the value of the bit corresponds to zero is not included as the variable element of the control command. Only valid argument fields may be included in the data packet structure, which will be described in detail with reference to FIG. 3.

As described above, since the number, arrangement order, and invalidity of the argument fields representing the variable elements of the control instruction correspond to the flag fields, the identification of the argument fields can be grasped by checking the setting state of the flag fields.

On the other hand, the argument field of the control command for controlling and monitoring the device does not exceed the size of 1 byte, but may be composed of 2 bytes or a string. Therefore, a data packet including only one byte argument field may be configured, and a data packet including only two byte argument fields may be configured. When the size of the argument field is different, it can be specified by constructing a data packet with different command codes (CC).

Hereinafter, a procedure for configuring the structure of the data packet by changing the argument field according to the setting of the flag field will be described.

3 is an exemplary diagram illustrating a procedure of configuring a structure of a data packet of FIG. 2.

Referring to FIG. 3, it is possible to determine the number of argument fields, the arrangement order, and whether the flag field of the data packet is set.

If the flag field of the data packet is one byte, that is, 8 bits, eight argument fields may be included in the data packet, from ARG (1) to ARG (8).

When the bit of the flag field is 8 bits and the bit value is '01001100', the arrangement order of the bit values and the arrangement order of the argument fields correspond identically, so that only the argument fields ARG (2), ARG (5) and ARG (6) It becomes valid and the remaining argument fields become invalid (B).

In this case, the packet may be configured to exclude an invalid argument field from the data packet. That is, depending on the setting of the flag field, the data packet may include up to eight argument fields, but only valid argument fields ARG (2), ARG (5), and ARG (6) are valid except the invalid argument fields. By including in the above, the configuration of the data packet can be simplified to include only necessary elements (C).

In this way, if only the valid argument field is included in the data packet according to the setting of the flag field, the flag field is used as a length field indicating the total length of the argument field. By adjusting the setting of the argument field, the configuration of the control command of the data packet can be diversified, and the argument field can be added to cope with the expansion of the control command for the function of the device to be added.

Meanwhile, the device for generating and transmitting the data packet may include only necessary argument fields and set and transmit a flag field. A device that receives the data packet and generates and transmits the response data packet may also check the setting of the flag field of the received data packet to generate the data packet by including only necessary argument fields. Therefore, the burden on the transmission physical medium can be reduced as compared with the transmission of the data packet including the argument field of all control commands.

In the case of the data packet including the argument field of all control commands, the configuration of the data packet should be converted according to the function of the corresponding device. However, in the case of the data packet including only the required argument field, the data packet between devices to which a single protocol is applied You can send it without having to convert it. Therefore, the home server can transfer the data packet as it is between the devices of a single protocol without conversion, thereby reducing the burden on the data conversion of the home server.

Hereinafter, a method of controlling and monitoring a home machine by transmitting and receiving data packets in a home network system will be described.

4 is an exemplary view showing a data transmission and reception method using a data packet according to an embodiment of the present invention. 5 is a flowchart illustrating a data transmission / reception method using a data packet according to an embodiment of the present invention.

4 and 5, the device a 110 transmits the data packet X to the device b 120 through the home server 100, and the device b 120 sends the response data packet Y to the home server 100. ) To the device a (110).

Here, the device a (110) may be a device capable of controlling the device b (120) using an interface device, a computer, etc. in the home, and also a portable terminal capable of controlling the device (b 120) through an external communication network; Service server or the like. Thus, the same protocol may be applied to the transmission physical medium between the device a 110 and the device b 120, or another protocol may be applied.

Device a 110 generates a data packet X to control and monitor device b 120. The data packet X sets the corresponding argument field to be valid in the flag field only for the functions to be controlled or monitored among the functions of the device b 120, and includes only the valid argument field in the data packet. In this case, the argument field indicates a detailed operation state of the device b 120, and may be a predetermined value set according to a variable value or a control manual provided for the operation of each function of the device b 120. .

For example, when the device b 120 has functions such as temperature, air volume, main wind direction, right wind direction, left wind direction, timer, and wet mode as an air conditioner, a flag of a data packet that controls only the air conditioner temperature and the right wind direction. The field is set to '10010000'. According to the flag field, only the argument fields ARG (1) and ARG (4) corresponding to the temperature and the right wind direction are included in the data packet.

The generated data packet X is transmitted to the device b 120 through the home server 100, and the device a 110 and the home server 100 and the device b 120 and the home server 100 use the same protocol. In this case, the home server 100 may transmit the data packet X directly from the device a 110 to the device b 120 without converting the data packet X (S10).

The device b 120 receives the data packet X from the home server 100. The device b 120 may check the setting of the flag field of the received data packet X and recognize a valid argument field according to the setting of the flag field of the data packet X (S20).

The device b 120 recognizes a valid argument field and controls each function of the device b 120 according to a corresponding control command.

When the device b 120 transmits the response data packet Y to the device a 110, the flag field of the response data packet Y is set according to the setting of the flag field of the received data packet X. The response data packet Y is configured by including only valid argument fields according to the setting of the flag field of the response data packet Y.

For example, as in the flag field of the data packet X received by the air conditioner, the flag field of the response data packet Y is set to '10010000'. The air conditioner adjusts the temperature and the right wind direction according to the control command, and configures the response data packet Y by including only the argument fields ARG (1) and ARG (4) corresponding to the resultant temperature and the right wind direction.

The device b 120 transmits the configured response data packet Y to the device a 110 through the home server 100. The device a 110 may receive the response data packet Y to confirm the operation state of the device b 120.

As mentioned above, preferred embodiments of the present invention have been described in detail, but those skilled in the art to which the present invention pertains should understand the present invention without departing from the spirit and scope of the present invention as defined in the appended claims. It will be appreciated that various modifications or changes can be made. Accordingly, modifications to future embodiments of the present invention will not depart from the technology of the present invention.

In the data packet, only the valid argument fields are included in the data packet according to the flag (FLAG) field that determines whether the argument (ARG) field indicating the variable value of the control command is valid. Can be reduced. In addition, by changing the setting of the flag field, it is possible to flexibly respond to control commands for functions added to the device. Furthermore, it can be a base technology that can configure the protocol of the data packet for the control command of the device in a single form.

Claims (6)

A method for configuring a data packet for transmitting a control command in a home network system in which a first device controls a second device, Generating at least one argument (ARG) field indicating a variable value of the control command; And Generating a flag (FLAG) field indicating that the argument field is valid, wherein one argument field indicates any one of a plurality of detailed operating states of the second device, and the at least one argument field And generating as many detailed operational states as control targets among the plurality of detailed operational states and included in the data packets. The method of claim 1, wherein the number of argument fields corresponds to the number of bits of the flag field. The method of claim 2, wherein the arrangement order of the argument fields corresponds to the arrangement order of the bits of the flag field, and if the value of the bit is one, the corresponding argument field is valid, and the value of the bit is If zero, the corresponding argument field is invalid. 4. A method according to claim 3, wherein an argument field area is formed only of the valid argument fields. In the method of transmitting and receiving data from the first device to the second device of the home network system, Setting a flag (FLAG) field in the first device and transmitting only a valid argument (ARG) field to the data packet; And Receiving the data packet at the second device and confirming a setting of the flag field to recognize a valid argument field, wherein one argument field indicates any one of a plurality of detailed operating states of the second device; And the valid argument field is generated in the data packet as much as a detailed operation state to be controlled among the plurality of detailed operation states, and the flag field indicates the valid argument field. 6. The method of claim 5, wherein the argument field indicates a detailed operating state of one of the first device and the second device.

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