KR20050046701A - Grid-type multi smart node system and method for automatically recognizing positions of smart nodes in the same - Google Patents

Abstract

The present invention relates to a multiple smart node system in the form of a grid and a method for automatic node position recognition in the system. Each of the multiple smart node systems has information processing and display functions and network functions, and includes a plurality of smart nodes arranged in a grid form, and the plurality of smart nodes are capable of mutual communication with adjacent nodes located in a grid form. The position of the remaining smart nodes is determined based on the position of the smart node as a reference among the plurality of smart nodes, and each of the plurality of smart nodes automatically recognizes its own node position through mutual communication between the plurality of smart nodes. Characterized in that. Here, the smart node as the reference is a smart node having no smart node adjacent to the left side and the upper side among the plurality of smart nodes in the grid form. According to the present invention, the location of a plurality of smart nodes arranged in a grid form is automatically recognized, the entire location map of nodes is automatically generated, the location is automatically recognized and the location is added according to the addition of new nodes or removal of existing nodes. You can effectively update the map.

Description

GRID-TYPE MULTI SMART NODE SYSTEM AND METHOD FOR AUTOMATICALLY RECOGNIZING POSITIONS OF SMART NODES IN THE SAME}

The present invention relates to a multiple smart node system, and more particularly, to a multiple smart node system including a plurality of smart nodes arranged in a grid, and the plurality of smart nodes in the system automatically recognizes the location. It is about how to.

In general, a multi-smart node system refers to a system that performs a variety of processes using a plurality of smart nodes each having an information processing capability and a network function.

An example of such a multi-smart node system is a smart architectural surface, in which a number of cells or modules based on sensors form walls to provide various interactive interfaces to the user.

Among the multiple smart node systems, a multi-smart node system composed of a plurality of smart nodes arranged in a grid form, such as a sensor network arranged at regular intervals or an ceiling control arrangement of an office which can be individually controlled, has the following characteristics.

1. Consists of multiple smart nodes.

2. Each smart node is physically separated or in contact with nearby smart nodes.

3. Each smart node has a computing function.

4. Each smart node has data storage capability.

5. Individual communication from one smart node to up, down, left and right smart nodes is possible.

In a grid-type smart node system having such a feature, there are cases in which the smart nodes are exchanged or relocated according to the initial placement and subsequent maintenance or operation of the smart nodes. For this purpose, each smart node is associated with their physical location. Identifier must be given. This is because the system deployment scenarios in which the relative position between a specific smart node and other smart nodes becomes important when the multiple smart node systems in a grid form are arranged in a form suitable for the purpose, may be useful. This is because each smart node must be aware of.

In this grid-type multiple smart node system, one smart node can know its own location in two ways. One method is to recognize its own location through manual configuration at installation. The other is to set your location automatically while the system is running.

The method of manually setting the location of each smart node, the former method, is not only inefficient, but also less scalable and faster. In particular, in a multiple smart node system having many smart nodes, a method of automatically positioning each smart node in the system is required.

As an example of a method of automatically setting the position of the smart nodes, which is the latter method, in the case of the Z tile, the sensor node network is automatically set using a directional wired network in a sensor network physically connected in a fixed pattern. In this example, the sink node connected to the outside is set as a starting point, and the (x, y) of all connected nodes and the hop count from the sink node are automatically set. Set the routing path of. In this system, each smart node does not store a location map of the system-wide smart nodes and thus data exchange between smart nodes is not considered.

As another example, the Cricket System, developed as part of MIT's "Oxygen" project, uses a lateration technique that uses distance measurement using ultrasonic sensors to set the position of sensor nodes within an error within cm. Location infrastructure system. Here, after manually setting the position of several anchor nodes, the position is set from the node closest to the anchor nodes. Recently, a method of setting the position of an entire node by generating a flash and an ultrasonic signal externally without an anchor node has been developed.

Meanwhile, in the present invention, it is required to automatically set the position of each smart node using a method different from the method of automatically setting the position of each node in the above-described prior art.

Accordingly, an object of the present invention is a multiple smart node system in which a plurality of smart nodes arranged in a grid form automatically determine their positions through communication with adjacent smart nodes, and automatic recognition of the positions of the smart nodes in the system. To provide a way.

In order to achieve the above object, a multiple smart node system according to a feature of the present invention,

Each of which has an information processing and display function and a network function, and includes a plurality of smart nodes arranged in a grid, wherein the plurality of smart nodes are capable of mutual communication with adjacent nodes located in a grid; The position of the remaining smart nodes is determined based on the position of the smart nodes as the reference among the smart nodes of the smart nodes, so that each of the plurality of smart nodes automatically recognizes its own node position through mutual communication between the plurality of smart nodes. It features.

Here, the smart node as the reference is a smart node having no smart node adjacent to the left side and the upper side among the plurality of smart nodes in the grid form.

In addition, the smart node as the reference is characterized by calculating the location of the adjacent smart node on the basis of its node position and delivers to the corresponding smart node.

In addition, the adjacent smart node that has received the node position calculated from the smart node as the reference sets the received node position as its node position, and calculates the position of the smart node adjacent to itself based on the set node position thereof. It is characterized in that for transmitting to the smart node.

The plurality of smart nodes may generate and store a location map of all nodes based on location information of each of the smart nodes.

In addition, when a new smart node is added adjacent to a specific smart node, the node position of the added smart node is calculated based on the node position of the specific smart node, and the calculated smart node is calculated on the created location map. It is characterized in that the position of the added.

In addition, when the smart node existing adjacent to a specific smart node is removed, the removed smart node is removed from the created location map.

According to another aspect of the present invention, a method for automatically recognizing a node location in a multiple smart node system includes:

An automatic node position recognition method in a multiple smart node system including a plurality of smart nodes arranged in a grid form,

a) initializing the node location; b) determining whether the smart node is a reference; c) if it is determined in step b) that the smart node is a reference, setting the reference position as its own location; d) calculating a position of an adjacent node with reference to the set reference position and transferring the calculated position to the corresponding node; And e) if it is determined that the smart node is not the reference in step b), setting its own node location based on the location information transmitted from the adjacent node.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the present invention. As those skilled in the art would realize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present invention. In the drawings, parts irrelevant to the description are omitted in order to clearly describe the present invention. Like parts are designated by like reference numerals throughout the specification.

Hereinafter, a grid-type multiple smart node system according to an embodiment of the present invention will be described in detail.

1 is a schematic block diagram of a grid-type multiple smart node system according to an embodiment of the present invention.

As shown in FIG. 1, the multiple smart node system in a grid form according to an embodiment of the present invention includes a plurality of smart nodes 11, 12, 13, 21, 22, 23, 31, 32, and 33 arranged in a grid form. ).

The smart nodes 11, 12, 13, 21, 22, 23, 31, 32, 33 each comprise a sensor / actuator, a storage device, a communication device and a computing device. Here, since the smart nodes 11, 12, 13, 21, 22, 23, 31, 32, and 33 are all composed of the same components, the sensor / included in one smart node 11 for convenience of description. Only the actuator 111, the storage device 113, the communication device 115, and the computing device 117 will be described.

First, the sensor / actuator 111 includes various sensors for sensing an external situation and actuators for displaying various reactions to the outside according to internal commands. For example, the sensor may include an environmental sensor that measures a state of an external environment such as a temperature / humidity sensor that measures temperature / humidity, an illuminance sensor that measures illuminance, a camera that captures an external image, a microphone that receives an external voice, There may be a behavior sensor that detects a change in the external environment, such as a touch sensor that senses a touch input from the outside, or an ultrasonic sensor that senses the location of users through ultrasonic waves. In addition, the actuator may include a speaker for outputting voice or sound to the outside, a light emitting diode (LED) or a display device for displaying an internal state with various colors of light.

The storage device 113 stores various programs or data for the smart node 11 to operate. In the embodiment of the present invention, the storage device 113 is created based on the location information of the smart node 11 and the location information of all the smart nodes 11, 12, 13, 21, 22, 23, 31, 32, and 33. More location maps are stored.

The communication device 115 is a device for communicating with a smart node adjacent to the periphery. In the case of the smart node 11, since there are no smart nodes on the upper side and the left side, only the two smart nodes 12 and 21 adjacent to the right side and the lower side communicate with each other.

Various communication methods may be used as the communication device 115. For example, it may be a wired or wireless communication device. In the embodiment of the present invention, it is assumed that a short-range wireless communication method, for example, an infrared infrared (IR) method, is used for communication between smart nodes. In addition, a directional radio communication device capable of only exchanging data between two adjacent transceiver devices facing each other similarly to an infrared method may be used.

Since each smart node 11, 12, 13, 21, 22, 23, 31, 32, 33 is arranged in a grid, each smart node 11, 12, 13, 21, 22, 23, 31, 32, When 33) communicates with an adjacent smart node, it is only necessary to communicate with the smart nodes in the up, down, left and right directions. That is, each smart node (11, 12, 13, 21, 22, 23, 31, 32, 33) is provided with wireless communication input and output modules one by one in all four neighboring smart nodes arranged in their top, bottom, left and right Communicate one-on-one with In FIG. 2, an IR transceiver for short range wireless communication is attached to a smart node. Assuming the smart node 11, the communication device 115 of the smart node 11 includes four short range communication devices 115-1, 115-2, 115-3, and 115-4. The short range communication devices 115-1, 115-2, 115-3, and 115-4 communicate one-to-one with smart nodes adjacent to up, down, left, and right directions, respectively. In the case of the smart node 11, since there are no smart nodes in the up direction and the left direction, the two short-range communication devices 115-2 and 115-4 communicate with the smart nodes 21 and 12 in the down direction and the right direction. To perform.

As such, a block diagram of the smart node 11 in which the communication device 115 includes four short range communication devices 115-1, 115-2, 115-3, and 115-4 is shown in FIG. 3.

As shown in FIG. 3, the communication device 115 includes four short range communication devices 115-1, 115-2, 115-3, and 115-4 and a communication controller 115-5. The communication control unit 115-5 communicates with the corresponding smart nodes when the four short range communication devices 115-1, 115-2, 115-3, and 115-4 are adjacent to the top, bottom, left, and right sides. To control the operation. Therefore, if there are no adjacent smart nodes through the four local area communication devices 115-1, 115-2, 115-3, and 115-4, the communication controller 115-5 communicates with the corresponding local area communication devices. Control is performed so that the computing device 117 is notified of this fact.

On the other hand, the arithmetic unit 117 controls the smart node 11 to perform various operations accurately through the control of the sensor / actuator 111, the storage device 113, and the communication device 115, so that the smart node system executes the execution. Support the work you want to do. In the embodiment of the present invention, the computing device 117 communicates with the smart nodes 12 and 21 adjacent to each other through the communication device 115 to automatically set the position of the smart node 11 to which it belongs, It transmits its own location information to the adjacent smart nodes (12, 21). In addition, the arithmetic unit 117 collects the location information transmitted from the adjacent smart nodes 12 and 21, creates an entire map of the smart node system, and stores it in the storage device 113.

In addition, the computing device 117 periodically checks the state in which the smart node is added or removed through the communication device 115, calculates and transmits the position of the added smart node when added, and also adds Delivers full map information including smart nodes. In addition, when the adjacent smart node is removed, this state is checked and transmitted to neighboring adjacent smart nodes so as to be reflected in the entire map information.

Meanwhile, although only one node 11 has been described in the grid-type smart node system, the technical scope of the present invention is not limited thereto, and it can be easily applied to all other nodes by those skilled in the art. Will be understood.

Hereinafter, a method of automatically recognizing a location in a grid-type multiple smart node system according to an embodiment of the present invention will be described with reference to FIGS. 4 to 10.

First, referring to FIG. 4, each of the computing devices 117 of all the smart nodes 11, 12, 13, 21, 22, 23, 31, 32, and 33 performs initialization when power is supplied. This initialization includes general initialization, for example the initialization of the sensor / actuator 111, the storage device 113 and the communication device 115, and further includes the initialization for automatic location recognition. At the time of initialization for automatic location recognition, each smart node 11, 12, 13, 21, 22, 23, 31, 32, 33 sets the node position to (-1, -1) (S100).

Next, each smart node 11, 12, 13, 21, 22, 23, 31, 32, 33 checks whether there is a node adjacent to it (a smart node, hereinafter referred to as a "node"). (S110). That is, the computing device 117 is a node adjacent to the top, bottom, left and right through the four short-range communication devices (115-1, 115-2, 115-3, 115-4) included in the communication device 115 Check for existence.

If the node does not exist in the left direction or the upper direction (S120), that is, in the case of the node 11, it is a starting point for recognizing the position of the node. The computing device 117 of the node 11 first sets the position of its node to (0 0) newly (S130), and calculates the position of the adjacent nodes 12 and 21 (S140). That is, the position of the adjacent nodes 12 and 21 is calculated based on the position (0, 0) of the node 11 as the node 12 as (0, 1), and the position of the node 21 as (1, 0).

Next, the computing device 117 of the node 11 transfers the position information of the nodes 12 and 21 calculated as described above to the corresponding neighboring nodes 12 and 21, respectively (S150).

In this way, automatic position recognition of each node (11, 12, 13, 21, 22, 23, 31, 32, 33) is started.

On the other hand, if there is a node on the left or on the step (S120), since it is not the starting point of location recognition, it waits to receive the position information calculated position from the adjacent node (S160).

If the location information is received from the adjacent node (S160), the node that receives the location information, for example, the node 12, determines whether the received location information, that is, (0, 1) is new location information (S170). . Here, whether or not the new location information is assuming that the received location information is (x, y), the x value of the received location information is greater than the x value of the existing location information, or the y value of the received location information is existing. It is judged whether or not it is larger than the y value of the positional information, and when either one is large, it is determined that the received positional information (x, y) is new positional information. Thus, the x, y values of the newly received location information are replaced to replace the x, y values of the existing location information. That is, since the specific node receives the position information in the up direction or the left direction, respectively, in this case, since the already received position information may be repeatedly received, this step is necessary.

If the received location information is new location information, the node sets its node location to the location indicated by the received location information (S180). For example, node 12 receives location information of (0, 1) from node 11. Since the position information is position information newer than the position (-1, -1) which is initialized and set in the node 12, the position included in the received position information, that is, (0, 1), is changed to the position of the node 12. Set to position.

Next, the node having reset the position determines whether there is a node adjacent to all directions other than the direction in which its position is received (S190).

If there are nodes adjacent in all directions, the computing device of the node whose position is reset calculates a corresponding position (S200) and transfers the calculated position information to the corresponding adjacent node (S210).

In this way, the position of the node is automatically recognized and set for all nodes.

On the other hand, if there is no node adjacent to the other direction except for the node that transmitted the location information after the step (S150) and the step (S210), all nodes that automatically recognize the location create a full location map based on the recognized location (S220).

A process of creating an entire location map based on the recognized location of the node will be described with reference to FIG. 5.

First, a location map of the current node is created (S220-1).

Next, it is determined whether there are neighboring nodes that have delivered location information in the current node (S220-2). If there are neighboring nodes that deliver location information in the current node, the location map created in step S220-1 is delivered to the corresponding neighboring nodes (S220-3).

Thereafter, the current node delivers the location information of the neighboring nodes that delivered the location information determined in the step S220-2 to other neighboring nodes on the location map created in the step S220-1 (S220-4). .

Finally, neighboring nodes that have delivered the location information determined in step S220-2 are added to the location map created in step S220-1 (S220-5).

Through the above process, all the smart nodes included in the grid-type multi-node system according to an embodiment of the present invention can automatically recognize their location and create and store a location map of all nodes.

Next, after the location is automatically set for all the smart nodes as described above, each smart node periodically checks the presence of the surrounding smart nodes through the short range wireless communication device. That is, periodically checking whether there is a case where a new smart node that does not exist or a new smart node that exists does not exist.

Hereinafter, a process of creating a new smart node automatically by adding a new node in a direction that does not exist and automatically creating a whole location map with reference to FIGS. 6 to 8 will be described.

First, an operation process at a node (hereinafter referred to as a "check node") in which an adjacent node has been added will be described with reference to FIG. 6.

The computing device of the check node periodically checks that an adjacent node is added using the short range wireless communication device of the communication device (S300). For example, there was no adjacent node in the right direction of the original check node, but if a node is newly added in the right direction of the check node at this moment, this additional fact is checked by periodic check of the check node.

Next, the check node determines whether the adjacent node is added in step S300 (S310), and if the adjacent node is added, calculates the position of the added neighbor node based on its node position (S320). In step S330 and S340, the calculated location information and the total location map information already stored in the storage device are transmitted to the added neighbor node.

After that, the check node adds the node added to the location map stored in the storage device to create a location map of all new nodes and stores the location map (S350), and then passes the information of the next adjacent node to the adjacent node to add the node. Notify the fact (S360).

Next, with reference to FIG. 7, a description will be given of creating a location map in other nodes that have received the added information.

First, other nodes continue to monitor whether node additional information is received (S400), and when the node additional information is received through a neighboring node generated from the check node, the other node is added to the entire location map stored therein. It is determined whether the node exists (S410).

If the added node exists in the location map, the node does not need to be added. If the added node does not exist in the location map, the other node performs the operation of adding the node to the location map to create and save the new location map. (S420).

Thereafter, the other node transmits node additional information back to the adjacent node (S430).

Meanwhile, a node newly added to the multi-node system also needs to prepare its own node location and the entire location map. This process will be described with reference to FIG. 8.

First, the additional node monitors whether location information is received from the check node (S500), and when location information is received from the check node, sets the corresponding location information to its node location (S510).

Subsequently, while continuously monitoring whether location map information is received from the check node (S520), and when location map information is received from the check node, the node position set in step S510 is added to the received location map. By adding and generating a new location map (S530, S540), the node addition to the existing smart node system is completed.

Next, a process of removing the existing smart node and reflecting it on the entire location map will be described with reference to FIGS. 9 and 10.

First, an operation process at a node (hereinafter referred to as a "check node") that checks that an adjacent node has been removed will be described with reference to FIG. 9.

The computing device of the check node periodically checks that the neighbor node is removed using the short range wireless communication device of the communication device (S600). For example, if there was an adjacent node in the right direction of the original check node, but the node in the right direction of the check node is removed at any moment, the fact of removal is checked by the periodic check of the check node.

Next, the check node determines whether the neighboring node has been removed in step S600 (S610), and if the neighboring node has been removed, deletes the removed node from the location map stored in the storage device and maps the location of the entire new node. After creating and storing (S620), the information of the node removed is forwarded to the adjacent node and notified of the node removal (S630).

Next, with reference to FIG. 10, location map creation in other nodes that have received the information from which the node has been removed will be described.

First, other nodes continue to monitor whether node removal information is received (S700), and when the node removal information is received from a check node through an adjacent node, the other nodes are removed from the entire location map stored therein. It is determined whether the node exists (S710).

If the removed node exists in the location map, the other node generates a new location map by storing the removed node part from the location map and stores the new location map (S720). If the removed node does not exist in the location map, other nodes do not need to remove the node.

Thereafter, the other node transmits node removal information back to the adjacent node (S730).

Although the present invention has been described with reference to the most practical and preferred embodiments, the present invention is not limited to the above-described embodiments, but includes various modifications and equivalents within the scope of the following claims.

According to the present invention, identifiers, such as the location of all nodes on a sensor network arranged in a grid form at regular intervals and, if necessary, an internet address (IP), are automatically and automatically initialized regardless of the number of nodes. In the case of adding, exchanging, and removing more or more sensor nodes, it automatically detects them, automatically updates the entire location map of the sensor nodes, and positions the sensor nodes to selectively acquire sensor values of specific sensor nodes. You can provide useful information if you need to determine the and identifier.

In addition, according to the present invention, identifiers, such as the positions of all nodes on a grid-spaced actuator and output device network and, if necessary, associated Internet addresses (IPs), are automatically and automatically regardless of the number of nodes. And automatically detects the addition, exchange, and removal of one or more actuator and output device nodes, and automatically updates the entire location map of the actuator and output device nodes, as well as specific actuator and output device nodes. In order to selectively transmit control values to the controller, it is possible to provide useful information when the position and the identifier of the actuator and output device nodes need to be determined.

In addition, according to the present invention, data for transmitting data from one or a plurality of specific nodes to another or a plurality of nodes on a sensor network or an actuator and an output device network arranged in a grid at regular intervals. It is possible to provide useful information when it is necessary to determine the location and the identifier of the sensor nodes that are the target of transmission.

1 is a schematic block diagram of a grid-type multiple smart node system according to an embodiment of the present invention.

FIG. 2 is a diagram illustrating a state in which an IR transceiver for short range wireless communication is attached to a smart node shown in FIG. 1.

FIG. 3 is a detailed block diagram of the smart node shown in FIG. 1.

4 is a flowchart illustrating a method for automatically recognizing a location in a grid-type multiple smart node system according to an exemplary embodiment of the present invention.

FIG. 5 is a detailed flowchart of a location mapping process shown in FIG. 4.

6 is a flowchart illustrating an operation process of a node that checks that an adjacent node is added in a grid-type multiple smart node system according to an exemplary embodiment of the present invention.

FIG. 7 is a flowchart illustrating a process of creating a location map at another node receiving information added with neighboring nodes in a grid-type multiple smart node system according to an exemplary embodiment of the present invention.

FIG. 8 is a flowchart illustrating a process of adding a node location and a total location map of a node added in a grid-type multi-smart node system according to an exemplary embodiment of the present invention.

9 is a flowchart illustrating an operation process of a node in which a neighbor node is removed in a grid-type multiple smart node system according to an exemplary embodiment of the present invention.

FIG. 10 is a flowchart illustrating a process of creating a location map at another node receiving information from which adjacent nodes are removed in a grid-type multiple smart node system according to an exemplary embodiment of the present invention.

Claims (18)

Each of which has information processing and display functions and network functions, and includes a plurality of smart nodes arranged in a grid; The plurality of smart nodes may communicate with adjacent nodes located in a grid form. The position of the remaining smart nodes is determined based on the position of the smart node as a reference among the plurality of smart nodes, and each of the plurality of smart nodes automatically recognizes its own node position through mutual communication between the plurality of smart nodes. doing Multiple smart node system, characterized in that. The method of claim 1, The plurality of smart nodes are each, A sensor / actuator that senses an external situation and displays various reactions to the outside; A storage device for storing location information and global location map information of the smart node; A communication device capable of mutual communication with a smart node adjacent to the smart node; And A computing device that controls the sensor / actuator, the storage device, and the communication device so that the corresponding smart node automatically recognizes its node position. Multiple smart node system comprising a. The method of claim 2, The communication device is a multiple smart node system including a short-range communication device capable of short-range wireless communication with four adjacent smart nodes located in all directions of the smart node. The method of claim 1, The short-range communication device is a multi-smart node system, characterized in that the directional wireless communication device that can only exchange data between two infrared transceivers facing each other or infrared (IR) method. The method according to any one of claims 1 to 4, The smart node as the reference is a multiple smart node system, characterized in that there is no smart node adjacent to the left and the top of the plurality of smart nodes of the grid form. The method of claim 5, The smart node as the reference calculates the location of the adjacent smart node on the basis of its node position and transmits to the adjacent smart node. The method of claim 5, The adjacent smart node that has received the node position calculated from the smart node as the reference sets the received node position as its own node position, calculates the position of the smart node adjacent to itself based on its set node position, and Multiple smart node system, characterized in that for transmitting to the smart node. The method of claim 7, wherein The calculated position information is transmitted to all adjacent smart nodes except the node that has received the position information, multiple smart node system. The method of claim 5, The plurality of smart nodes is a multi-smart node system, characterized in that for creating and storing a location map of the entire node based on the location information of each smart node. The method of claim 9, When a new smart node is added adjacent to a specific smart node, the node position of the added smart node is calculated based on the node position of the specific smart node, and the calculated position of the smart node on the created location map. Multiple smart node system, characterized in that is added. The method of claim 9, When the smart node that existed adjacent to a particular smart node is removed, the removed smart node is removed from the created location map. In the node position automatic recognition method in a multiple smart node system including a plurality of smart nodes arranged in a grid form, a) initializing the node location; b) determining whether the smart node is a reference; c) if it is determined in step b) that the smart node is a reference, setting the reference position as its own location; d) calculating a position of an adjacent node with reference to the set reference position and transferring the calculated position to the corresponding node; And e) if it is determined that the smart node is not a reference in step b), setting its own node location based on location information transmitted from an adjacent node; Node location automatic recognition method in a multiple smart node system comprising a. The method of claim 12, After step e), f) creating a location map of all smart nodes based on the transmitted location information Node location automatic recognition method in a multiple smart node system further comprising. The method of claim 13, After step f), g) periodically checking neighbor nodes to determine whether neighbor nodes are added; h) if it is determined in step g) that an adjacent node has been added, calculating a location of the added node and delivering the location to the added node along with the location map created in step f); i) adding the added node to the location map created in step f); And j) notifying the adjacent node of the node addition. Node location automatic recognition method in a multiple smart node system further comprising. The method of claim 13, After step f), g) determining whether to receive node additional information; h) if it is determined that the node addition information has been received in the step, determining whether the added node exists in the location map created in step f); i) if it is determined in step h) that the added node does not exist in the location map, adding the added node to the location map; And j) notifying the adjacent node of the node addition. Node location automatic recognition method in a multiple smart node system further comprising. The method of claim 14, In step h), the added node receiving the calculated position and the created position map sets the received calculated position as its node position, and sets the set node position to the received position map. Node location automatic recognition method in multiple smart node system, characterized in that the addition. The method of claim 13, After step f), g) periodically checking neighbor nodes to determine whether neighbor nodes are removed; h) if it is determined that the adjacent node is removed in step g), deleting the removed node from the location map created in step f); And i) informing adjacent nodes of the node removal Node location automatic recognition method in a multiple smart node system further comprising. The method of claim 13, After step f), g) determining whether to receive node removal information; h) if it is determined that the node removal information has been received in the step, determining whether the removed node exists in the location map created in step f); i) if it is determined in step h) that the removed node exists in the location map, deleting the removed node from the location map; And j) notifying adjacent nodes of the node removal. Node location automatic recognition method in a multiple smart node system further comprising.