KR20030045576A - Data packet recording media, management method thereof and bi-directional communication method applying on power line communication - Google Patents

Abstract

PURPOSE: A data packet recorded medium applied to a power line communication method, an operating method and a bidirectional communication method are provided to continuously respond to an ACK signal with 2 bits on a back end of a command transmitted by a master, without packet-processing the ACK signal for bidirectional communication, thereby remarkably reducing data traffic at a high speed. CONSTITUTION: When power is supplied, a transmission equipment enters a standby state(900). If a host directs to start finding a home code(902), the equipment transmits an optional home code with a home code hail request signal(904). All receiving equipments receiving the home code hail request signal decide whether received home code data are the same as self home codes. If so, each receiving equipment immediately transmits a hail NAK signal(906). If the home code data are not the same, each receiving equipment does not respond to the data, and transmits a hail ACK signal(910). The transmission equipment deletes the transmitted home code, and transmits the home code hail request signal again with new home code data(908). If none of the receiving equipments transmits the hail NAK signal, the transmission equipment completes a home code finding process, and reports a finally-received home code to the host, to be assigned with the home code(912).

Description

Data packet recording media, management method and bi-directional communication method applied to power line communication method {Data packet recording media, management method, etc. and bi-directional communication method applying on power line communication}

The present invention relates to a data packet recording medium applied to power line communication, an operation method thereof, and a response method for bidirectional communication. More particularly, the present invention relates to a data packet recording medium that extends conventional X-10 based power line communication. A method of operation and a response method for bidirectional communication applied to a physical layer of a signal.

In general, in order to remotely control a large number of devices or devices provided in a home, an office, or a factory, a control method using power line communication has recently been widely used due to its convenience.

In general, data communication at a zero cross point on a power line is performed in units of one cycle of power frequency for each data bit, and indicates data bits according to positions of carrier signals per half cycle. That is, according to the conventional X-10 based communication method, a signal is generated while generating a 120KHz power line signal for 1 ms at a zero cross point of the power line's power level, and power line communication is performed by combining these data.

1A and 1B are waveform diagrams showing data bits in a data communication method using zero cross points of a general power line.

As shown in FIGS. 1A and 1B, when a carrier signal is present as 'ON' and when there is no 'OFF', the data bit '1' is displayed as a carrier signal 'OFF' in the carrier signal 'ON'. The data bit '0' is indicated by the carrier signal 'on' from the carrier signal 'off'.

Data communication using a zero cross point of a power line is based on this definition, in which control devices transmit and receive data to and from each other using the power line.

For the data communication method using the existing zero cross point, the present inventors have already applied for and registered the 'remote control apparatus using bidirectional power line communication and its control method' (Publication No. 10-2000-002198) and the Priority data communication method using zero cross point '(published number: 10-1999-053820) is described in detail, and this power line communication method utilizes an X-10 based communication method.

The X-10 based communication method is as follows.

FIG. 2A is a data structure diagram illustrating a starting point of a conventional X-10 based protocol, and FIG. 2B is a waveform diagram illustrating the data structure illustrated in FIG. 2A as a waveform.

First, as shown in FIG. 2A, the X-10-based protocol start point includes two cycles of 'Start Code', four cycles of 'House Code', and five cycles of 'Number Code' or 'Function Code'. Send the signal twice in succession. At this time, 'Start Code' exists only 1110, and one data is transmitted in 1/2 cycle, and other codes are data of 1 and 0 if data is L1 because one cycle means 1 bit of data. Is extended and transmitted, and if L0, it is extended to 0 and 1 and sent. This is illustrated in Figure 2b.

Meanwhile, L1 and L0 are defined as follows.

If the carrier frequency is present at the zero cross point, it is defined as '1', and if it is not present, it is defined as '2', and 'logical 1 (L1)' is defined as '1' where the carrier frequency is present at the zero cross point and not present. 0 is a combination, and 'logical 0 (L0)' means a carrier frequency does not exist at a zero cross point and a carrier frequency exists at a next zero cross point, that is, a combination of 0 and 1.

Therefore, according to FIG. 2B, 'Start Code' is '1110', 'House Code' is 'L0, L0, L0, L1', and 'Number / Function Code' is 'L0, L0, L0, L1, L1'. do.

Recently, SMPS (Switching Mode Power Supply) is used as a power supply unit of almost all home appliances, and the noise generated from these SMPSs is generated from household electrical appliances such as air conditioners, vacuum cleaners, mixers, and the like. Due to the noise, the reliability of the power line communication method is increasingly threatened. Therefore, there is a problem that it is difficult to secure the reliability of the communication contents with the conventional carrier detection method and the one-way communication system.

An object of the present invention for solving the problems of the prior art as described above is a response for bidirectional communication applied to the data packet recording medium, its operation method and the physical layer of the signal to further extend the conventional X-10 based powerline communication. It is to provide a method.

1A and 1B are waveform diagrams showing data bits in a data communication method using zero cross points of a general power line,

Figure 2a is a data structure diagram showing the starting point of the conventional X-10 based protocol,

FIG. 2B is a waveform diagram showing a waveform of the data structure shown in FIG. 2A;

3 is a view showing a data flow of the Z256 protocol according to an embodiment of the present invention,

4A and 4B are data structure diagrams illustrating an RHC standard packet structure according to an embodiment of the present invention.

5A is a structural diagram of an RHC command packet according to an embodiment of the present invention;

5B is a packet structure diagram when an address of a Z256 device turns on unit 1;

6A is a packet structure diagram of an RHC response command,

6B is a diagram illustrating definition according to a packet value of an RHC response command.

7A is a structural diagram of an RHC result packet according to an embodiment of the present invention,

7B is a diagram illustrating a definition according to a list of result commands.

7C is a structural diagram of an RHC result packet when an address of a Z256 device turns on unit 1;

8A is a structural diagram of an RHC collision packet according to an embodiment of the present invention;

8B is a structural diagram of a data transmission cancellation packet according to an embodiment of the present invention;

9 is a flowchart illustrating a home code search process according to an embodiment of the present invention;

10 is a flowchart illustrating a home code setting process according to an embodiment of the present invention.

11 is a flowchart illustrating a home code deletion process according to an embodiment of the present invention.

12 is a flowchart illustrating an address searching process according to an embodiment of the present invention;

13 is a flowchart illustrating an address modification process according to an embodiment of the present invention;

14 is a flowchart illustrating a power-on reset notification process of devices according to an embodiment of the present invention.

15 is a waveform diagram illustrating a concept of a bidirectional ACK communication method according to an embodiment of the present invention.

In order to achieve the above object, according to the present invention, a computer-readable recording medium that records a data packet applied between an RS232c host of a power line communication and a power line communication device, comprising: inputting, modifying, inquiring and A start area that can be deleted; A packet length area for inputting, modifying, and deleting a length of the data packet; A command code area for entering, modifying, querying, and deleting command codes for the powerline communication device; A message data area for inputting, modifying, inquiring, and deleting an address and actual command contents for a target power line communication device in said command code; And a checksum area for inputting, modifying, querying, and deleting an exclusive logical sum (XOR) of the start area, packet length area, command code area, and message data area values. Wherein the packet length region is a sum of the lengths of the command code region, the message data region, and the checksum region. The computer-readable recording data packet applied between the RS232c host and the powerline communication device of the powerline communication may be used. A recording medium is provided.

A computer-readable recording medium having recorded a command packet for controlling the power line communication device via RS232c from an RS232c host bound to a power line to a power line communication device, comprising: inputting, modifying, A start area for viewing and deleting; A packet length area for inputting, modifying, and deleting a length of the data packet; A command code area for entering, modifying, querying, and deleting command codes for the powerline communication device; A message data area for inputting, modifying, inquiring, and deleting information about an address for a target power line communication device in said command code; And a checksum area for inputting, modifying, querying, and deleting an exclusive logical sum (XOR) of the start area, packet length area, command code area, and message data area values. Wherein the packet length region is a sum of the lengths of the command code region, the message data region, and the checksum region, and the lengths of all the regions consist of 1 byte. A computer readable recording medium having recorded a command packet for controlling the power line communication device via RS232c to a power line communication device is provided.

In addition, a computer-readable recording medium recording a response command packet of the power line communication device receiving a command packet, the response command capable of inputting, modifying, inquiring, and deleting a response to a command received by the power line communication device. The response command area can be input, modified, inquired, and deleted in three cases: RS232c communication is successful, a packet error occurs during RS232c communication, and a packet cannot be transmitted to the current power line. There is provided a computer-readable recording medium having recorded thereon a response command packet of the power line communication device which has received a command packet.

A computer-readable recording medium having recorded a result packet of the power line communication device receiving a command packet, the computer-readable recording medium comprising: a start area for inputting, modifying, inquiring, and deleting information about a communication start; A packet length area for inputting, modifying, and deleting a length of the data packet; A command code area for entering, modifying, querying, and deleting command codes for the powerline communication device; A message data area for inputting, modifying, inquiring, and deleting information about an address for a target power line communication device in said command code; And a checksum area for inputting, modifying, querying, and deleting an exclusive logical sum (XOR) of the start area, packet length area, command code area, and message data area values. The command code area may be divided into a case in which the current state is OFF, the present state is ON, the target device for the command code of claim 4 does not exist, and the state does not exist. And a computer readable recording medium having recorded thereon a result packet of the powerline communication device that has received the command packet, which can be deleted.

In addition, when the power line communication device connected to the RS232c host and the RS232c attempts to transmit data to the power line, other data is already being transmitted on the power line or data to be transmitted by collision detection (C / D: Collision Detect). A computer readable recording medium recording a collision packet to be used when the transmission priority is low due to a low priority, comprising: a start area for inputting, modifying, inquiring, and deleting information about a communication start; A packet length area for inputting, modifying, and deleting a length of the data packet; A command code area for entering, modifying, querying, and deleting command codes for the powerline communication device; A message data area for inputting, modifying, inquiring, and deleting information about an address for a target power line communication device in said command code; And a checksum area for inputting, modifying, querying, and deleting an exclusive logical sum (XOR) of the start area, packet length area, command code area, and message data area values. And the command code area is capable of recording a message indicating that data transmission is canceled. A computer readable recording medium having recorded thereon a collision packet is provided.

Further, in the home code setting method of power line communication using a hale communication method, when a host instructs to start a home code search among power line communication devices, the transmitting device wants to use any home with a home code hale request signal. A first step of transmitting a code; If the received home code data is different from its home code, a second step of performing power line communication by transmitting a hale ACK signal by not responding to each receiving device; All receiving devices that have received the home code hale request signal determine whether the received home code data is the same as their own home code, and if they are identical to their own home code, each receiving device transmits a hale NAK signal. A third step of doing; And a fourth step of, upon receiving the hale NAK signal, the transmitting device deletes the previously transmitted home code, transmits a home code hale request signal together with new home code data, and then returns to the second step. Provided is a home code setting method of power line communication using a hale communication method including a.

Also, in the power line communication system, a device having a home code set an address by using a hale communication method. When the host instructs to perform an initialization operation, the device wants to use the address along with an address hale request signal. A first step of transmitting the address of; If the received address data is different from its own address, each receiving device makes no response, thereby transmitting a hale ACK signal to allow use of the received address data; A third step in which each receiving device immediately transmits a Hale NAK signal if the receiving device has the same address data received by the receiving device; And a fourth step of, when receiving the Hale NAK signal, the transmitting device again transmits an Address Hale Request signal together with new address data and then returns to the second step; There is provided an address setting method comprising a.

A method of updating an address by an address change request after an address is set, the method comprising: a first step of, when a host instructs address modification, the device receiving the command transmits an address to be used with an address hale request signal; If the received address data is different from its own address, each receiving device makes no response, thereby transmitting a hale ACK signal to allow use of the received address data; If the received address data is identical to its own address, each receiving device immediately sends a Hale NAK signal; Upon receiving the Hale NAK signal, the transmitting device transmits the Address Hale Request signal again with the new address data, and then returns to the second step.

In the bidirectional power line communication method, when a master transmits a packet to a power line communication device, the power line communication device receiving the packet adds a state (ACK message) to the end of the received packet. The ACK message is transmitted to the master, and the ACK message is divided into two states: when the state of the received power line communication device is On, when the state of the received power line communication device is Off, and when there is no state of the received power line communication device. A bidirectional power line communication method is provided.

Hereinafter, referring to the accompanying drawings, a response for bidirectional communication applied to a data packet recording medium, a method of operating the same, and a physical layer of a signal, which further extends conventional X-10 based powerline communication according to an embodiment of the present invention. The method will be described in more detail.

1. Z256 communication method and packet structure applied thereto

The communication packet and communication protocol (hereinafter referred to as Z256) used in the power line communication method applied to the present invention will be described as follows.

Z256 communication basically uses CSMA (Carrier Sense Multiple Access) / CDCA (Collision Detection CollisionAvoidance) communication method for bidirectional communication. It is also designed to be compatible. While the Z256 is compatible with the X10, there are a number of complements to the X10 that make it a complete bidirectional communication method, multiple access and monitoring that could not be achieved in the X10.

In addition, the PLC (Power Line Communication) protocol according to Z256 is mainly focused on power line control by low-speed communication, and the communication method proposed in the present invention is applied to a PLT-10 PLC transceiver. do.

Z256 has sub-protocols of RHC (Rs232c Hic Communication) protocol and H2C (Hic Tohic Communication) protocol as shown in Table 1 below. The RHC protocol is a protocol for the interface between the Z256 device and the RS232c Host, and the H2C protocol is a protocol for PLC communication between the Z256 devices.

TABLE 1

Item Description Remark RHC RS232c HIC Communication RS232c interface protocol between RS232c host and Z256 device H2C HIC To HIC Communication PLC communication protocol between Z256 device and Z256 device

3 is a diagram illustrating a data flow of the Z256 protocol according to an embodiment of the present invention.

As shown in Figure 3, the RHC protocol is a communication protocol between the RS232c host and the Z256 device.

The RHC protocol is managed by the RS232c host and corresponds to the rules for configuring RHC packets to send signals to the powerline.

First, when the RS232c host sends an RHC packet composed of a command (CMD: Command) to the Z256 device side, the Z256 device transmits an RHC Response CMD corresponding to a command to the RS232c host and at the same time the Z256 device. Receives an RHC packet composed of the command, transmits a packet (PLC Tx End) that inquires a message end point to the RS232c host to determine where the end point of the command is, and the RS232c host makes a response. (RHC Response CMD)

Meanwhile, the Z256 device interprets the command, transmits the command packet to another Z256 device corresponding thereto (H2C Packet), and then receives a corresponding ACK message (H2C Status ACK). The protocol in this case corresponds to the H2C protocol defined above.

4A and 4B are data structure diagrams illustrating an RHC standard packet structure according to an embodiment of the present invention.

As shown in Figs. 4A and 4B, an RHC packet includes one byte of STX (Start code), one byte of Len.P (packet length), one byte of CMD (command code), n bytes of MSG (message data) and C / S. (Checksum) It consists of 1 byte.

In addition, the MSG is an area in which an address or data is recorded. When only an address is present, only 1 byte of the address is recorded. When the address and data exist simultaneously, up to 8 bytes are recorded.

On the other hand, the value of STX is recorded as FEh, which means the start of a packet.

In addition, the value of Len.P is recorded as Hex, and means the sum of the lengths of CMD, MSG, and C / S.

In addition, the value of CMD is recorded as Hex, and means an RHC command code.

In addition, the value of MSG is recorded in Hex and is limited to a maximum of 8 bytes.

In addition, the value of C / S is recorded as Hex, and means an exclusive OR of STX to MSG values.

5A is a structural diagram of an RHC command packet according to an embodiment of the present invention, and FIG. 5B is a packet structural diagram when an address of a Z256 device turns on unit one.

As shown in Fig. 5A, the structure of the RHC command packet is composed of 1 byte of STX area, 1 byte of Len.P area, 1 byte of CMD area, 1 byte of MSG area and 1 byte of C / S area.

The RHC command packet is a packet used to control a Z256 device bound to a power line, and is transmitted through RS232c from an RS232c host to a Z256 device.

On the other hand, the CMD area consists of one byte of command code, and the MSG area consists of one byte of the target address. The addresses available on the Z256 device are 00h through 3Fh, and address 00h is a reserved address that specifies all devices.

On the other hand, when the address of the Z256 device turns on unit 1, FEh is recorded in the STX area, 03h is recorded in the Len.P area, 34h is recorded in the CMD area, and 01h is recorded in the MSG area. , C8S is recorded in the C / S area.

6A is a diagram illustrating a packet structure of an RHC response command, and FIG. 6B is a diagram illustrating a definition according to a packet value of an RHC response command.

As shown in Figs. 6A and 6B, the RHC response command packet is composed of one byte of the response CMD area.

In addition, the 'ACK' list means that the RS232c communication was successful, the 'NAK' list means that a packet error occurred during RS232c communication, and the 'Busy' list means that the packet cannot be transmitted to the current power line. .

RHC communication transmits a response CMD within 10ms when the RHC packet is received. The RHC communication compares the C / S values and transmits them according to the state of the modem. In addition, when receiving the MSG from the H2C during the RHC communication, the RHC transmits the 'NAK' to the RS232c host, and then transmits the MSG to be received from the H2C to the RS232c host.

At this time, the RHC communication is not obliged to retransmit the 'NAK' signal or timeout.

On the other hand, if the response CMD is Busy, data cannot be transmitted to the power line due to collision or the like on the power line. If the data is canceled, a separate packet (hereinafter referred to as RHC collision packet) can be processed. Design to be possible.

FIG. 7A is a structural diagram of an RHC result packet according to an embodiment of the present invention, FIG. 7B is a diagram illustrating a definition according to a list of result commands, and FIG. 7C shows an address of a Z256 device turning unit 1 on. Structure diagram of RHC result packet in case.

As shown in Fig. 7A, the structure of the RHC result packet is composed of 1 byte of STX area, 1 byte of Len.P area, 1 byte of CMD area, 1 byte of MSG area and 1 byte of C / S area.

After the command packet is transmitted from the RS232c host, the state of the Z256 device is received as an RHC result packet, and the CMD region is composed of one byte of the result command.

7B is a diagram showing the definition according to the result of the command list, 'Status OFF' list means that the current state is OFF state, 'Status ON' list means that the current state is ON state, 'Status Fail' The list means that the device could not be found, and the 'Status Nothing' list means that there is no Z256 device.

In addition, as shown in FIG. 7C, when the address of the Z256 device turns on unit 1, the structure of the RHC result packet is recorded with FEh in the STX area, 03h in the Len.P area, and 3Bh in the CMD area. Is recorded, 01h is recorded in the MSG area, and C7h is recorded in the C / S area.

8A is a structural diagram of an RHC collision packet according to an embodiment of the present invention, and FIG. 8B is a structural diagram of a data transmission cancellation packet according to an embodiment of the present invention.

The Z256 device, which is connected to an RS232c host and an RS232c, is set to powerline monitoring mode and can see what data is sent to the powerline via the RHC protocol.

In the monitoring mode, when the Z256 device attempts to transmit data to the power line, other data is already being transmitted on the power line, or the data to be transmitted by C / D (collision detection) is low and cannot be transmitted. If so, the RHC collision packet is used to indicate that it has not yet transmitted its data to the power line. This RHC collision packet is composed of STX area, 1 byte of Len.P area, CMD area, 1 byte of MSG area and 1 byte of C / S area.

To receive an RHC collision packet from the RS232c host and cancel the data transmission over the powerline, send a data transmission cancel packet. This data transmission cancellation packet is composed of an STX area, Len.P area 1 byte, CMD area, MSG area 1 byte, and C / S area 1 byte.

On the other hand, in power line communication, a host and a client, or a master and a client are not absolutely distinguished. That is, this division is a relative concept in power line communication, in which all power line communication devices may be masters or clients.

2. How to set device home code in Z256

The power line communication method using the above-described Z256 data packet structure will be described below.

First, a hale communication method used in the present invention is defined as follows.

The hale communication method is not a communication method having a source and a destination, but a method in which source data is transmitted from one source device and all devices receive and process it. (Broadcast method: Broadcast )

There are two types of Hale communication methods: Hale Request and Hale Acknowledge.

The Hale Request method is a method in which a source device having data generates a hale and requests a response from all devices. If the received device accepts the received data, it responds with no response. Answer If the source device transmits a hale and receives no response within the Acknowledge Time, it acknowledges with permission and performs it, and upon receipt of the Hale NAK, it destroys its data.

The hale acknowledgment method is a method in which a source device having data generates a hale and transmits it to all devices. The source device that generated the hale does not have a one-way transmission and waits for a response, and the received devices only receive and process the received data.

The home code is a code that makes a communication distinction between power line devices installed in other homes. A home code is a unique group code that solves communication interference and prevents hacking from other users.

The home code setting method of the power line communication device is automatically assigned by using the hale communication method, and a user's arbitrary code cannot be given and can be set again. In the present invention, there are three types of signals transmitted and received using hale communication.

Hale Request: A signal that a device with data to broadcast for all devices generates a hale and requests a response from all devices.

Hale ACK (Acknowledge): Signal indicating the permission for the content when the device receiving the broadcast data according to the hale request is the content corresponding to the content. The Hale ACK signal takes the form of no response to the Hale Request.

Hale NAK (No Acknowledge): A signal indicating that the device receiving the broadcast data according to the Hale Request indicates a negative for the content when the content of the received data corresponds to the content thereof. The Hale NAK signal is transmitted continuously without delay at the end of the received data, ie as soon as the received data is received.

In the initial conditions when the devices are first installed and powered up, the home code address is 'FFFFh', which is without a home code. There are three home code settings, which are divided into the following.

(1) home code search status

9 is a flowchart illustrating a home code search process.

The home code search state is a process for assigning a home code by a user when a power line communication device is first installed, and searches for an unused home code by searching for another home or an entire area where communication is possible. If a host exists among several devices, the home code search state is applied to only the host device and executed. In a preferred embodiment, the device operating as the host device is the same as the transmitting device, and the home code search module loaded in the transmitting device performs the host function. However, in another embodiment, the user may artificially operate the transmitting device by pressing a button on the remote control or the device as a host. In the latter case, a button of a device or a device operation control unit and a program of the present invention are linked by an API (Application Program Interface) operating as middleware.

First, after the power line communication device is first installed, when power is supplied, the transmitting device enters a standby state (step 900). When the host instructs to start home code search (step 902), the transmitting device transmits any home code that it wants to use with the home code hale request signal (step 904).

Every receiving device that receives the home code hale request signal determines whether the received home code data is the same as its own home code. If the received home code data is the same as its home code, each receiving device immediately transmits a Hale NAK signal (step 906). On the other hand, when the received home code data is different from its home code, each receiving device transmits a hale ACK signal by not responding at all (step 910).

Upon receiving the Hale NAK signal, the transmitting device deletes the previously transmitted home code and transmits a home code hale request signal again with the new home code data (step 908). This process is repeated until no Hale NAK signal is received from any receiving device or until a preset search time expires.

If none of the receiving devices that receive the Home Code Hale Request signal transmit a Hale NAK, the sending device considers the Hale ACK, terminates the home code search process, reports the last transmitted home code to the host, Assign a home code (step 912).

(2) Home code setting status

10 is a flowchart illustrating a home code setting process.

In the state where the home code is set for the host device, the user or the program may instruct to set the home code assigned to the host device to all other devices (step 920).

When the transmitting device broadcasts home code information for all devices (step 922), receiving devices without a home code assign the received home code to their home code (step 922), and host this state. Notify the device. Accordingly, if there is more than one device assigned a home code, the home code information is broadcasted to all devices that have not been assigned a home code at one time, so that even if the device is continuously connected, the home code is assigned in one operation. You can do it. As described above, when the host device exists, the home code setting process is applied only to the host device.

(3) home code deletion status

11 is a flowchart illustrating a home code deletion process.

If the device to be installed is a device that has been used elsewhere, or if the device being used is transferred, it is necessary to change the home code of all devices or reset the home code of a specific device. When the host instructs to delete the home code (step 960), the device receiving the command changes its home code to an initial value (FFFFh) and then notifies it (step 962).

3. Device address setting by Hale (plug and play)

A device having a home code may be automatically assigned an address by using a hale communication method, and may be assigned or reset by an arbitrary user address.

The device can set an address group according to the type, and the address can be used repeatedly.

(1) Plug and Play Address Search Status

The initial address of the device whose address is not set is set to 'FFh', and this state is without an address. The device without an address automatically issues a plug and play address hale request and acquires and sets its address the first time a specific operation (function) is started after the power is turned on. Address setting by plug and play does not allow duplication of addresses.

12 is a flowchart illustrating an address searching process.

First, when the device is powered on, the transmitting device enters the standby state, and when the host instructs to perform the initialization operation (step 1000), the device transmits an arbitrary address to be used with the address hale request signal. (Step 1002). If the received address data is the same as its own address, each receiving device immediately transmits a Hale NAK signal (step 1004). On the other hand, if the received address data is different from its own address, each receiving device does not respond at all, thereby transmitting a hale ACK signal to allow use of the received address data (step 1008).

Upon receiving the Hale NAK signal, the transmitting device again transmits the Address Hale Request signal together with the new address data (step 1006). This process is repeated until no Hale NAK signal is received from any receiving device or until a preset search time expires. If none of the receiving devices that have received the address Hale Request signal transmit a Hale NAK, the sending device considers the Hale ACK, terminates the address search process, reports the last transmitted home code to the host, and sends it to its own address. Assignment (step 1010).

(2) Address modification status

When resetting the address of a used device, setting a duplicate address for synchronous control, or changing an address for releasing synchronous control, it is necessary to correct the address of the used device. .

13 is a flowchart illustrating an address modification process.

If the host instructs the address modification (step 1050), the device receiving the command transmits an address to be used with the address hale request signal (step 1052). If the received address data is the same as its own address, each receiving device immediately transmits a Hale NAK signal (step 1054). On the other hand, if the received address data is different from its own address, each receiving device does not respond at all, thereby transmitting a hale ACK signal to allow use of the received address data (step 1056).

Upon receiving the Hale NAK signal, the transmitting device again transmits the Address Hale Request signal together with the new address data (step 1058). This process is repeated until no Hale NAK signal is received from any receiving device or until a preset search time expires. If none of the receiving devices that have received the address Hale Request signal transmit a Hale NAK, the sending device considers the Hale ACK, terminates the address search process, reports the last transmitted home code to the host, and sends it to its own address. (Step 1060).

(3) Power-on reset notification of devices

In each of the devices to which the home code and the address are assigned, when the power is applied again after the power is removed, the device broadcasts the information of the device to inform other devices that the device is activated.

14 is a flowchart illustrating a power-on reset notification process of devices.

Immediately after the user inputs power to the device (step 1070), if the device is given a home code and address, the device broadcasts that the other device is activated (step 1072).

4. Improved Bidirectional ACK Communication Method in Z256

15 is a waveform diagram illustrating a concept of a bidirectional ACK communication method according to an embodiment of the present invention.

In general, the conventional two-way power line communication method is a method that can determine whether the execution of the command issued by the master (Master), and provides a method for packet processing the ACK signal.

However, in the present invention, it is possible to ensure the reliability of the communication by informing the master whether or not the command issued by the ACK, in the present invention, when the sender gives a command, the device receiving the command This communication reliability is secured by re-transmitting the state performed by the end of the received packet immediately.

That is, the transmitting side can receive the ACK (response) to know whether the operation and status.

There are three types of retransmissions (2 bit ACK message).

1,0: On (when the status of the receiving device is On)

0,1: Off (When the state of the receiving device is Off)

0,0: No state (when there is no state of the receiving device)

As shown in FIG. 15, the device receiving the command adds an ACK packet to the end of the transmission packet and transmits the ACK packet to the master, which shows cases of 'On', 'Off', and 'No state'.

While the invention has been described above based on the preferred embodiments thereof, these embodiments are intended to illustrate rather than limit the invention. It will be apparent to those skilled in the art that various changes, modifications, or adjustments to the above embodiments can be made without departing from the spirit of the invention. Therefore, the protection scope of the present invention will be limited only by the appended claims, and should be construed as including all such changes, modifications or adjustments.

As described above, the present invention provides a more flexible power line communication method by providing a packet structure of Z256 in which the conventional X-10 is improved.

In addition, according to the present invention, when the power line communication device is installed, the user can easily set and change the home code or device address of each device easily and propagate the setting / change contents to other devices. This method is not only convenient to use, but also prevents hacking from the outside, and can be easily plug and play in small devices such as home appliances requiring small software programs.

In addition, since ACK is continuously responded with 2 bits after the command sent by the master without packet processing the ACK signal for realizing bidirectional communication, data traffic is much faster and faster than when the ACK is processed as a packet for the master command. There is a significant effect to reduce.

Claims (21)

A computer-readable recording medium having recorded a data packet applied between an RS232c host of a power line communication and a power line communication device, A start area for inputting, modifying, inquiring, and deleting information about communication start; A packet length area for inputting, modifying, and deleting a length of the data packet; A command code area for entering, modifying, querying, and deleting command codes for the powerline communication device; A message data area for inputting, modifying, inquiring, and deleting an address and actual command contents for a target power line communication device in said command code; And A checksum area for inputting, modifying, querying, and deleting an exclusive logical sum (XOR) of the start area, packet length area, command code area and message data area values; Including, And said packet length area is the sum of the lengths of said command code area, message data area and checksum area. A computer-readable recording medium having recorded thereon a data packet applied between an RS232c host and a power line communication device of power line communication. The method of claim 1, And the start area is recorded as FEh, and the remaining area is recorded as Hex. A computer readable recording medium having recorded thereon a data packet applied between an RS232c host and a power line communication device of power line communication. The method of claim 1, If only the address exists, the message data area is composed of 1 byte of address. If the address and data exist at the same time, the combined value of the address and data is recorded up to 8 bytes. And the remaining area is composed of 1 byte. A computer-readable recording medium having recorded a command packet for controlling the power line communication device via RS232c from an RS232c host bound to a power line to a power line communication device, A start area for inputting, modifying, inquiring, and deleting information about communication start; A packet length area for inputting, modifying, and deleting a length of the data packet; A command code area for entering, modifying, querying, and deleting command codes for the powerline communication device; A message data area for inputting, modifying, inquiring, and deleting information about an address for a target power line communication device in said command code; And A checksum area for inputting, modifying, querying, and deleting an exclusive logical sum (XOR) of the start area, packet length area, command code area and message data area values; Including, The packet length region is a sum of the lengths of the command code region, the message data region, and the checksum region, and the lengths of all the regions consist of 1 byte. The power line communication device of the RS232c host bound to the power line. And a computer-readable recording medium having recorded thereon a command packet for controlling the power line communication device via RS232c. A computer-readable recording medium having recorded a response command packet of the power line communication device receiving the command packet of claim 4, comprising: A response command area for inputting, modifying, inquiring, and deleting a response to a command received by the powerline communication device; The response command area can be input, modified, inquired, and deleted by dividing into three cases: when a RS232c communication is successful, a packet error occurs during RS232c communication, and a packet cannot be transmitted to the current power line. A computer-readable recording medium having recorded a response command packet of the power line communication device receiving the command packet. A computer-readable recording medium having recorded a result packet of the power line communication device receiving the command packet of claim 4, comprising: A start area for inputting, modifying, inquiring, and deleting information about communication start; A packet length area for inputting, modifying, and deleting a length of the data packet; A command code area for entering, modifying, querying, and deleting command codes for the powerline communication device; A message data area for inputting, modifying, inquiring, and deleting information about an address for a target power line communication device in said command code; And A checksum area for inputting, modifying, querying, and deleting an exclusive logical sum (XOR) of the start area, packet length area, command code area and message data area values; Including, The command code area can be input, modified, inquired, and deleted when the current state is OFF, when the current state is ON, when the target device for the command code of claim 4 does not exist, and when there is no state. And a resultant packet of the power line communication device receiving the command packet. When a power line communication device connected to an RS232c host and an RS232c attempts to transmit data to the power line, other data is already being transmitted on the power line, or priority of data to be transmitted by collision detection (C / D: Collision Detect). In a computer-readable recording medium that records a collision packet to be used when the transmission is low due to low ranking, A start area for inputting, modifying, inquiring, and deleting information about communication start; A packet length area for inputting, modifying, and deleting a length of the data packet; A command code area for entering, modifying, querying, and deleting command codes for the powerline communication device; A message data area for inputting, modifying, inquiring, and deleting information about an address for a target power line communication device in said command code; And A checksum area for inputting, modifying, querying, and deleting an exclusive logical sum (XOR) of the start area, packet length area, command code area and message data area values; Including, And the command code area can record a message indicating that data transmission is canceled. In the home code setting method of power line communication using a Hale communication method, When the host instructs the home code search start of the power line communication device, the transmitting device transmits any home code desired to be used with the home code hale request signal; If the received home code data is different from its home code, a second step of performing power line communication by transmitting a hale ACK signal by not responding to each receiving device; All receiving devices that have received the home code hale request signal determine whether the received home code data is the same as their own home code, and if they are identical to their own home code, each receiving device transmits a hale NAK signal. A third step of doing; And Receiving a hale NAK signal, the transmitting device deletes a previously transmitted home code, transmits a home code hale request signal again with new home code data, and then returns to the second step; Home code setting method of power line communication using a Hale (Hail) communication method comprising a. The method of claim 8, The above steps are repeated until no Hale NAK signal is received from any receiving device or until a preset search time expires, wherein the home code setting of the power line communication using the Hale communication method is performed. Way. The method of claim 8, If none of the receiving devices that receive the Home Code Hale Request signal transmit a Hale NAK, the sending device considers the Hale ACK, terminates the home code search process, reports the last transmitted home code to the host, The method of claim 1, further comprising assigning a home code. The method according to any one of claims 8 to 10, After the home code setting is completed, instructing all other devices to set a home code assigned to the host device; And When the home code setting command is input, when the transmitting device broadcasts home code information to all devices, receiving devices having no home code assign the received home code to their home code; Including, When there is more than one device assigned a home code, the home code setting of the power line communication using the hale communication method characterized by broadcasting the home code information to all devices not assigned the home code at once. Way. The method of claim 11, If the host command to delete the home code, the device receiving the command further comprises the step of changing its home code to the initial value home code setting method of the power line communication using the Hale (Hail) communication method. A method in which a device having a home code set in a power line communication system sets an address using a hale communication method, If the host instructs the initialization operation to perform, the device transmits an arbitrary address that it wants to use with an address hale request signal; If the received address data is different from its own address, each receiving device makes no response, thereby transmitting a hale ACK signal to allow use of the received address data; A third step in which each receiving device immediately transmits a Hale NAK signal if the receiving device has the same address data received by the receiving device; And A fourth step of, upon receiving the Hale NAK signal, the transmitting device again transmits an Address Hale Request signal together with new address data, and then returns to the second step; Address setting method comprising a. The method of claim 13, Wherein the steps are repeated until no Hale NAK signal is received from any receiving device or until a preset search time expires. The method of claim 13, If none of the receiving devices that have received the address Hale Request signal transmit a Hale NAK, the transmitting device considers the Hale ACK, terminates the address searching process, reports the last transmitted home code to the host, and sends its own address. And assigning to the address. The method of claim 13, Immediately after the user powers on the device, if the device has been given a home code and address, the device further comprises broadcasting to other devices that it has been activated. A method of updating an address by an address change request after the address is set by any one of claims 13 to 16, If the host commands an address modification, the first device sends the address with the address hale request signal that it wants to use; If the received address data is different from its own address, each receiving device makes no response, thereby transmitting a hale ACK signal to allow use of the received address data; If the received address data is identical to its own address, each receiving device immediately sends a Hale NAK signal; And upon receiving the Hale NAK signal, the transmitting device returns to the second step after transmitting the Address Hale Request signal together with the new address data. The method of claim 17, Wherein said steps are repeated until no Hale NAK signal is received from any receiving device or until a preset search time expires. The method of claim 17, If none of the receiving devices that have received the address Hale Request signal transmit a Hale NAK, the transmitting device considers the Hale ACK, terminates the address search process, reports the last transmitted home code to the host, and sends its own address. The method of claim 1, further comprising assigning an address to the address. In the two-way power line communication method, When the master transmits a packet to the power line communication device, the power line communication device receiving the packet adds a state (ACK message) to the end of the received packet to transmit to the master. The ACK message is recorded when the state of the received power line communication device is On, the state of the received power line communication device is Off, and when the state of the received power line communication device is not recorded. . The method of claim 20, The ACK message, 10 means that the state of the received device is On, 01 means that the received device is Off. If 00, it means that there is no state of the device received.