KR101024075B1 - Apparatus and method for managing energy in wireless sensor network - Google Patents

Abstract

TECHNICAL FIELD The present invention relates to an apparatus and method for managing energy on a wireless sensor network, and to an apparatus and method for managing energy on a wireless sensor network that limits the propagation of queries and controls the power supply of sensor nodes.

An apparatus for managing energy in a wireless sensor network according to an embodiment of the present invention includes a control unit for controlling the sensing period of at least one sensor provided with reference to the received query message and the transmission period of sensing information sensed by the sensor; And a communication unit configured to transmit the sensing information detected in the sensing period in the transmission period according to the control result.

Wireless Sensor Network, Sensor Node, Sink Node, Query Message

Description

Apparatus and method for managing energy in wireless sensor network

The present invention relates to an apparatus and method for managing energy on a wireless sensor network, and more particularly, to an apparatus and method for managing energy on a wireless sensor network that restricts the propagation of query words and controls the power supply of sensor nodes. .

Wireless Sensor Network (WSN) is a wireless technology that can measure and detect various status and environmental information such as temperature, humidity, illuminance and pressure remotely without configuring a separate wired network. Therefore, wireless sensor networks can be used to monitor areas and objects that are difficult for human access or require constant measurement, monitoring and control, such as environmental condition monitoring, structure and building condition monitoring, volcanic activity monitoring, precise plant cultivation, and local and facility security. It can be effectively used to collect information about the system.

For remote monitoring and control of objects, many wireless sensor nodes are distributed in a certain area to form a single wireless network, which is the existing Personal Communications Services (PCS), Wireless Local Area Network (WLAN), and Digital Subscriber Line (DSL). It must be connected to a separate server through a wired or wireless network. Therefore, the user can access the server even if he or she does not go to the site, and can monitor and manage the area and the object.

The wireless sensor network consists of a sensor node including a sensor, a data processing module, and a wireless communication module. Since the power of the sensor node is limited by the use of a battery, the wireless sensor network has a low transmission power in order to maximize its operating life. It is desirable to have short radio coverage and energy efficient radio protocol capabilities.

The power consumption by the sensor node is mainly generated during sensing, processing, and communication, of which power consumption is the highest.

Therefore, the emergence of the invention to control the communication process and the sensing processor by the sensor node existing on the wireless sensor network to prevent unnecessary power consumption.

An object of the present invention is to limit the propagation of a query word on a wireless sensor network and to control the power supply of a sensor node.

The objects of the present invention are not limited to the above-mentioned objects, and other objects which are not mentioned will be clearly understood by those skilled in the art from the following description.

In order to achieve the above object, an apparatus for managing energy in a wireless sensor network according to an embodiment of the present invention includes a sensing period of at least one or more sensors provided with reference to a received query message and sensing information sensed by the sensor. And a control unit for controlling a transmission period and a communication unit for transmitting the sensing information detected in the sensing period in the transmission period according to the control result.

Method for managing energy in a wireless sensor network according to an embodiment of the present invention comprises the steps of controlling the sensing period of the at least one sensor provided with reference to the received query message and the transmission period of the sensing information sensed by the sensor and And transmitting the sensing information detected in the sensing period in the transmission period according to the control result.

Specific details of other embodiments are included in the detailed description and the drawings.

The apparatus and method for managing energy in the wireless sensor network of the present invention as described above has the advantage of preventing unnecessary power consumption by the sensor node by limiting the propagation of the query word and controlling the power supply of the sensor node.

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

1 is a conceptual diagram illustrating a wireless sensor network according to an embodiment of the present invention.

The wireless sensor network consists of a sink node 130 and sensor nodes 201, 202, 203, and 204, wherein at least one or more sensor nodes 201, 202, 203, and 204 are distributed in a wide area on the wireless sensor network.

In addition, the sensor nodes 201, 202, 203, and 204 collect environmental information of the surroundings and transmit the environmental information to the sink node 130 through wireless communication, and the sink node 130 collects data received from the sensor nodes. Save it.

The collected data is transmitted to the control server 120 through a public network, and the user 110 connects to the control server 120 using his terminal, and the sensor nodes 201, 202, and 203. It is possible to monitor the environmental information detected by, 204).

On the other hand, a large number of sensor nodes 201, 202, 203, 204 can be distributed over a large area, so it is not easy to replace the battery of the sensor node (201, 202, 203, 204) sensor Research is underway to improve the energy efficiency of the nodes 201, 202, 203, and 204.

The power consumption occupies the highest proportion among the operation by the sensor nodes 201, 202, 203, and 204, and the sensing operation and the communication operation, accordingly, the sensor nodes 201, 202, 203, and 204 according to an embodiment of the present invention. ) May perform a communication operation according to a sensing period and a transmission period set by the user 110.

For example, if the sensing period is 5 seconds, the sensor node performs a sensing operation every 5 seconds, and if the transmission period is 3 seconds, the sensor node transmits the sensing environment information (hereinafter, referred to as sensing information) every 3 seconds. do.

In addition, the sensing operation and the communication operation may be determined whether the operation is performed according to a preset condition. For example, when the sensing environment detected by the sensor nodes 201, 202, 203, and 204 is a temperature, the detected temperature is determined. The sensing operation and the communication operation may be performed by the sensor nodes 201, 202, 203, and 204 only when the temperature is higher than or equal to a specific temperature.

In addition, the sensor nodes 201, 202, 203, and 204 according to an exemplary embodiment of the present invention may operate by determining whether the power is supplied to at least one sensor provided. For example, when the sensor nodes 201, 202, 203, and 204 are equipped with the first sensor and the second sensor, the user 110 stops supplying power to the second sensor while maintaining the operation of the first sensor. The power supply of both the first sensor and the second sensor can be stopped.

1 illustrates that sensor nodes 201, 202, 203, and 204 communicate directly with sink node 130, a data path between sensor nodes may be formed in a tree structure. That is, in order for a specific sensor node to transmit sensing information to the sink node 130, at least one sensor node may receive the sensing information and transmit the sensing information to the sink node 130. Hereinafter, a sensing node that directly communicates with the sink node 130 in the top layer of the tree structure is called a top sensor node, and a sensing node that communicates with the sink node 130 through several sensor nodes in the bottom layer of the tree structure is the lowest. It is called a sensing node.

In this structure, the sensing information generated by each sensor node is transferred to the upper sensor node, and the upper sensor node aggregates the sensing information received from at least one lower sensor node and transmits the sensing information to its upper sensor node. Thus, the highest sensing node can receive the sensing information from all the sensing nodes in its lower layer and transmit it to the sink node 130.

Here, the transmitted sensing information may be delivered in a compressed form to reduce the load on the network. To this end, each sensor node may have a means for decompressing the sensed and transmitted sensing information and a means for combining and compressing a plurality of sensing information.

2 is a block diagram illustrating an apparatus for managing energy in a wireless sensor network according to an embodiment of the present invention. In the present invention, the function of the apparatus for managing energy in a wireless sensor network may be performed by a sensor node. It is referred to as a sensor node (200).

The sensor node 200 includes a communication unit 210, a storage unit 220, a control unit 230, a message generator 240, and a sensor unit 250.

The sensor unit 250 serves to detect the surrounding environment. Here, the sensing environment may include temperature, humidity, illuminance, pressure, oxygen amount, gas amount, remaining battery amount, etc. For this purpose, the sensor unit 250 may include at least one sensor. That is, each sensor can sense a different surrounding environment, for example, when the sensor unit 250 is composed of the first sensor and the second sensor, the first sensor senses the temperature and the second sensor Is to detect the amount of oxygen.

The controller 230 performs overall control of the communication unit 210, the storage unit 220, the message generator 240, and the sensor unit 250.

In addition, the controller 230 controls the sensing period of the sensor unit 250 and the transmission period of sensing information sensed by the sensor unit 250 with reference to the received query message. That is, the controller 230 controls the sensing period of each sensor constituting the sensor unit 250 and the transmission period of sensing information sensed by each sensor. In order to control the sensing period and the transmission period, the sensor node 200 may be provided with a timer (not shown).

The query message according to an embodiment of the present invention is a message for requesting a specific operation to the sensor node 200, and a cycle setting query message for requesting a sensing result of the surrounding environment, a region setting query message for setting a sensing region, and a sensor It may be one of update query messages for updating the operation of the node 200. The query message may be transmitted from the user 110 or may be automatically generated and transmitted by the control server 120.

3 is a diagram illustrating a query message according to an embodiment of the present invention, and showing a period setting query message.

The period setting query message 300 includes at least one of a target node field 310, a query type field 320, a sensing condition field 330, a sensing period field 340, and a transmission period field 350. .

The target node field 310 specifies an identifier of a node to which the query message 300 is to be received. That is, the user 110 and the control server 120 may specify the identifier of the sensor node in the target node field 310 to transmit the query message 300 to the specific sensor node.

In addition, the target node field 310 may specify a reserved word (hereinafter, referred to as a full node reserved word) indicating all sensor nodes included in the wireless sensor network as a sensor node to which the query message 300 is received. When the entire node reserved word is specified in the target node field 310 according to an embodiment of the present invention, this indicates that all sensor nodes on the corresponding wireless sensor network are to receive the query message 300. That is, the query message 300 for receiving a specific sensor node includes an identifier of a specific node, and the query message 300 for receiving all sensor nodes on a wireless sensor network includes all node reserved words. will be.

In the query type field 320, a query target is specified. That is, the sensor node 200 may include at least one or more sensors, and whether a response by at least one or more of the provided sensors may be set by the user 110 or the control server 120. In addition, an identifier of the corresponding sensor node 200 may be specified in the query type field 320. That is, the user 110 or the control server 120 may simultaneously request the identifier of the sensor node while requesting the sensing result by the sensor.

In the sensing condition field 330, a criterion for applying a sensing period is specified. FIG. 4 is a diagram illustrating a case in which a specific value is substituted into a field constituting the query message 300 of FIG. 3. The query type is temperature 410, the sensing condition is “greater than 20 degrees” 420, and the sensing is performed. A query message 300 is specified that the period is 2 seconds 430 and the transmission period is 4 seconds 440.

As illustrated in FIG. 4, when the sensing condition specified in the sensing condition field 330 is "greater than 20 degrees", the sensor monitors the temperature specified as the query target and then, if the temperature exceeds 20 degrees, the query message 300 The sensing operation is performed every two seconds according to the sensing period specified in. On the other hand, when the temperature is 20 degrees or less, that is, when the sensing conditions are not satisfied, the sensor may perform continuous temperature sensing.

Meanwhile, the transmission period may be set according to the sensing condition or may be set regardless of the sensing condition. For example, the transmission period may be set to 4 seconds only when the temperature exceeds 20 degrees, and the transmission period may be set to 4 seconds unconditionally regardless of the temperature.

The query message according to an embodiment of the present invention may be written in a structured query language (SQL) syntax, and FIG. 5 illustrates an SQL syntax 500 for expressing a period setting query message according to an embodiment of the present invention.

The SQL statement 500 for the cycle setting query message may be composed of a SELECT-FROM-WHERE clause. The SELECT statement may include the type of query, the FROM statement may include a target node, and the WHERE statement may include a sensing condition. Can be.

Here, the types of queries that may be specified in the SELECT statement may include at least one of NODEID, TEMP, OXY, and BAT, where NODEID represents an identifier of the target node, TEMP represents temperature, OXY represents oxygen, and BAT Indicates remaining battery level. For example, the user 110 or the control server 120 may request the response of the temperature together with the identifier of the target node by specifying NODEID and TEMP in the SELECT statement.

Target nodes that can be specified in the FROM statement may include node address or NETWORK, where node address represents an identifier of the target node and NETWORK represents a whole node reserved word, which is a reserved word representing all sensor nodes on the wireless sensor network. For example, the user 110 or the control server 120 can specify a node address in a FROM statement so that a query message can be sent only to a specific sensor node, and specify a NETWORK to query all sensor nodes on the wireless sensor network. You can have a message sent.

The SQL statement 500 for the period setting query message may include a SENSINGTIME statement and a SENDTIME statement, which represent a sensing period and a transmission period, respectively. The sensing period and the transmission period may be set in seconds, but are not limited thereto.

The user 110 may transmit a query message 300 only to a sensor node located in a specific area among sensor nodes on the wireless sensor network. For this purpose, the user 110 may transmit a query message 300 to a query node 300 in a specific area of the area formed by the wireless sensor network. You can specify a range.

6 is a diagram illustrating a region setting query message according to an embodiment of the present invention, wherein the region setting query message 600 includes a target node field 610, a query type field 620, a sensing condition field 630, and a sensing region. And at least one of the fields 640.

Here, since the target node field 610, the query type field 620, and the sensing condition field 630 are similar to those of the period setting query message 300, a detailed description thereof will be omitted.

In the sensing area field 640, an area where a response of sensing information is requested is specified. That is, the user 110 may receive the sensing information from the sensor node existing in the corresponding region by transmitting the region setting query message 600 in which the sensing region is specified. Here, when the sensing region is specified in the region setting query message 600, the region setting query message 600 may be transmitted only to the sensor nodes included in the specified sensing region.

Meanwhile, nothing may be specified in the target node field 610 of the region setting query message 600. If the identifier of a specific node is specified in the target node field 610, the identifier among the sensor nodes existing in the sensing area is specified. The region setting query message 600 may be transmitted only to the sensor node corresponding to the.

In addition, when all node reserved words are specified in the target node field 610 of the region setting query message 600, the region setting query message 600 may be transmitted to all sensor nodes existing in the sensing region.

7 illustrates an SQL syntax 700 for expressing a localization query message according to an embodiment of the present invention.

The SQL syntax for localized query messages (700), like the SQL syntax for periodic query messages (500), can consist of a SELECT-FROM-WHERE clause, where the SELECT statement can include the type of query and the FROM statement contains the target. Nodes can be included and WHERE statements can contain sensing conditions.

The SELECT-FROM-WHERE clause in the SQL statement 700 for a localized query message is similar to that in the SQL statement 500 for a periodic query message, and thus a detailed description thereof will be omitted.

The SQL syntax 700 for the region setting query message may include or omit at least one of a sensing period and a transmission period, and may include at least one coordinate of a region where a response of the sensing information is requested.

On the other hand, although the coordinates of the sensing area is shown as being two-dimensional, of course, it may be specified in three-dimensional.

In addition, the user 110 may transmit an update query message 800 for updating the operation of the sensor node 200. FIG. 8 illustrates an update query message 800 according to an embodiment of the present invention. As an example, the update query message 800 includes at least one of a target node field 810, an update condition field 820, and an update operation field 830.

Here, since the target node field 810 is similar to that of the period setting query message 300, a detailed description thereof will be omitted. Meanwhile, in the update condition field 820, a criterion for whether or not to perform an update operation is specified, which may be understood as similar to the sensing condition of the period setting query message 300.

In the update operation field 830, an operation requested by the sensor node 200 is specified. In the update operation field 830, transmission of sensing information is stopped, retransmission of sensing information, a sensing period, a transmission period, whether a specific sensor is operated, At least one of whether to use a residual battery may be included.

That is, the user 110 may set the sensing information to be unresponsive or responsive by transmitting the update query message 800, and may set a sensing cycle and a transmission cycle. In addition, by using the update query message 800, the user 110 may determine whether to operate a specific sensor among a plurality of sensors included in the sensor node 200, and determine whether to use a remaining battery.

9 illustrates an SQL syntax 900 for expressing an update query message in accordance with an embodiment of the present invention.

The update query message 900 includes an UPDATE statement, a SET statement, and a WHERE statement.

The UPDATE statement may include a target node, the SET statement may include an update operation, and the WHERE statement may include an update condition.

Target nodes that can be specified in the UPDATE statement may include node address or NETWORK, where node address represents the identifier of the target node and NETWORK represents the entire node reserved word.

Update operations that may be specified in the SET statement may include at least one of stop, restart, SENSINGTIME, SENDTIME, TempActCon, OxyActCon, and BatActCon, where stop indicates transmission of sensing information and restart indicates retransmission of sensing information. , SENSINGTIME indicates the sensing period, SENDTIME indicates the transmission period, TempActCon indicates whether the temperature sensor is operating, OxyActCon indicates whether the oxygen amount sensor is operating, BatActCon indicates whether the remaining battery is used.

Referring back to FIG. 2, the controller 230 may control the communication unit 210 and the sensor unit 250 to perform an operation according to the update operation.

For example, when the information on whether to transmit the sensing information is included in the update operation, the controller 230 may transmit a control command to the sensor unit 250 and the communication unit 210 to control whether the operation is performed. .

On the other hand, when the operation of the specific sensor specified in the update operation whether the power supply to the sensor, the controller 230 may determine whether to supply the power of the sensor. For example, when the power cutoff command of the temperature sensor is included in the update operation, the controller 230 cuts power to the temperature sensor.

In addition, the controller 230 may control the sensor unit 250 and the communication unit 210 according to the sensing period and the transmission period included in the update operation.

The communication unit 210 transmits the sensing information detected in the sensing period specified in the query messages 300 and 800 in the transmission period specified in the query message according to the control result of the control unit 230. In addition, as will be described later, the communication unit 210 also receives location information of the lower sensor node from the lower sensor node, and also transmits its own location information to the upper sensor node.

As described above, the user 110 may transmit an inquiry message 300, 600, 800 to a specific sensor node among sensor nodes existing on the wireless sensor network. To this end, it is preferable to secure the location information of each sensor node in the control server 120. For this purpose, all sensor nodes on the wireless sensor network can transmit their location information to the control server 120.

In the present invention, the sensor node 200 may also transmit location information of the lower sensor node in transmitting its location information. That is, the sensor node 200 transmits the position information to the upper sensor node. At this time, the sensor node 200 may also transmit the position information received from the lower sensor node.

Accordingly, the location information transmitted by the sensor node 200 may be location information of a plurality of sensor nodes. Hereinafter, data including location information of a specific sensor node is called metadata, and a plurality of metadata are accumulated. It is called a metadata table.

FIG. 10 is a diagram illustrating a metadata table according to an exemplary embodiment of the present invention. The metadata table 1000 includes a node identifier 1010, sensor information 1020, and a node location 1030.

The node identifier 1010 represents an identifier of the sensor node 200 to which its location information is to be transmitted, and the sensor information 1020 represents at least one type of at least one sensor included in the sensor node 200.

The node location 1030 may mean a specific point as spatial information on the wireless sensor network where the corresponding sensor node 200 is disposed, and may mean a specific area range.

In addition, although FIG. 10 shows that the node position 1030 consists of the X-axis and the Y-axis, the sensor node 200 arrange | positioned in the three-dimensional space has X-axis, Y-axis, and Z in order to notify its position. The sensor position configured as the axis may be included in the metadata table 1000.

Upon receiving the metadata table from the lower sensor node, the sensor node 200 may integrate the received metadata table into the metadata table including its location information. The location can be determined.

For example, on a wireless sensor network where there is a first sensor node at the top layer, a second sensor node at the middle layer, and a third sensor node at the bottom layer, the third sensor node may convert the metadata table to the second sensor node. When transmitting, the second sensor node locates the metadata including its location information above the metadata table and places the metadata including the location information of the third sensor node below the metadata table.

In addition, the second sensor node transmits a metadata table including its location information and the location information of the third sensor node to the first sensor node. The first sensor node transmits metadata including its location information. It is located above the metadata table, and the metadata of the metadata table received from the second sensor node is located below.

As the metadata table is configured according to the hierarchical ranking of the sensor nodes, a path for tracking a specific sensor node is determined. Referring to this, the user 110 queries the specific sensor node with a query message (300, 600, 800). Can be sent.

Referring back to FIG. 2, the message generator 240 generates a metadata. Here, as described above, the metadata may include the types and locations of at least one sensor included in the sensor node 200.

In generating the metadata, the message generator 240 may include information included in the metadata received from the lower sensor node in the generated metadata.

That is, the message generator 240 may integrate the received metadata table into the generated metadata table. In integrating the metadata table, each message is arranged according to the hierarchical order of sensor nodes. That can be as described above.

In addition, the message generator 240 may generate a message including the sensing information sensed by the sensor 250.

The storage unit 220 temporarily stores the received metadata table and the generated metadata table. The storage unit 220 may include a hard disk, a flash memory, a compact flash card (CF), a secure digital card (SD), a smart card (SM), a multimedia card (MMC), or a memory stick. May be provided inside the sensor node 200 as a module capable of inputting / outputting, or may be provided in a separate device.

11 is a flowchart illustrating a process of managing energy in a wireless sensor network according to an embodiment of the present invention.

When the user 110 transmits the query message 300 to efficiently manage the energy of the sensor node 200, the sensor node 200 receives it (S1110). In this case, the user 110 may transmit the query message 300 to a specific sensor node and may transmit the query message 300 to all sensor nodes on the wireless sensor network.

As the query message 300 is received, the sensor node 200 controls the sensing period of at least one or more sensors provided with reference to the query message 300 and a transmission period of sensing information sensed by the sensors (S1120, S1140).

That is, after the sensing operation by the sensor is completed, it is monitored whether it is time to perform the sensing operation again (S1120), or after the transmission of the sensing information, it is monitored whether it is time to perform the transmission operation again (S1140).

Thus, when the execution time of the new sensing operation is reached, the sensor node 200 detects the surrounding environment by the sensor (S1130) to generate sensing information, and when the execution time of the new transmission operation is reached, the sensor node 200 is reached. ) Transmits the generated sensing information (S1150).

In this case, the type of sensor for detecting the surrounding environment may be specified in the query message 300, and the sensor node 200 may control the sensing period and the transmission period only for the sensor specified in the query message 300.

Meanwhile, FIG. 11 shows that the transmission period monitoring (S1140) and the sensing information transmission (S1150) are performed after the sensing period monitoring (S1120) and the ambient environment detection (S1130) by the sensor, but this is an example. Of course, the order may be changed.

In addition, the sensing period monitoring step (S1120) and the surrounding environment sensing step (S1130) by the sensor are a series of steps (hereinafter, referred to as a sensing step) connected to each other, and a transmission cycle monitoring step (S1140) and sensing information transmitting step (S1150). ) Is also a series of steps (hereinafter referred to as a transmission step) connected to each other, the sensing step and the transmission step may be performed in parallel.

That is, the sensing step and the transmitting step may be performed separately, and the transmitting step is performed irrespective of the operation of the sensing step without the superiority of the order between the sensing step and the transmitting step, and the sensing step is performed regardless of the operation of the transmitting step. It can be.

Although embodiments of the present invention have been described above with reference to the accompanying drawings, those skilled in the art to which the present invention pertains may implement the present invention in other specific forms without changing the technical spirit or essential features thereof. You can understand that there is. It is therefore to be understood that the above-described embodiments are illustrative in all aspects and not restrictive.

1 is a conceptual diagram illustrating a wireless sensor network according to an embodiment of the present invention.

2 is a block diagram illustrating an apparatus for managing energy in a wireless sensor network according to an embodiment of the present invention.

3 is a diagram illustrating a query message according to an embodiment of the present invention.

4 is a diagram illustrating a case where a specific value is substituted into a field constituting the query message of FIG. 3.

FIG. 5 is a diagram illustrating an SQL syntax for expressing a query message of FIG. 3.

6 is a diagram illustrating a query message according to another embodiment of the present invention.

FIG. 7 is a diagram illustrating SQL syntax for expressing a query message of FIG. 6.

8 is a diagram illustrating a query message according to another embodiment of the present invention.

9 is a diagram illustrating an SQL syntax for expressing a query message of FIG. 8.

10 illustrates a metadata table according to an embodiment of the present invention.

11 is a flowchart illustrating a process of managing energy in a wireless sensor network according to an embodiment of the present invention.

<Explanation of symbols on main parts of the drawings>

210: communication unit 220: storage unit

230: control unit 240: message generating unit

250: sensor

Claims (20)

A control unit controlling a sensing period of at least one sensor provided with reference to the received query message and a transmission period of sensing information sensed by the sensor; And According to the control result includes a communication unit for transmitting the sensing information detected in the sensing period in the transmission period, And the query message is transmitted only to a specific node through a path determined according to a hierarchical ranking of sensor nodes. The method of claim 1, The query message may include a target node field in which an identifier of a node to which the query message is received is specified; A query type field in which a query target for the query message is specified; A sensing condition field in which a criterion for applying the sensing period is specified; A sensing period field in which the sensing period is specified; A transmission period field in which the transmission period is specified; And Includes at least one of the sensing area field in which the area where the response of the sensing information is requested to be specified, And said query subject comprises at least one of an identifier of said node and a type of sensor. 3. The method of claim 2, And if a reserved word indicating all nodes included in the wireless sensor network is specified in the target node field, the query message is transmitted to all nodes on the wireless sensor network. 3. The method of claim 2, And when the sensing region is specified, the query message is sent only to nodes included in the specified sensing region to manage energy on a wireless sensor network. The method of claim 1, The query message may include a target node field in which an identifier of a node to which the query message is received is specified; An update operation field specifying an operation requested by the node; And And at least one of an update condition field in which a criterion for performing the update operation is specified. The method of claim 5, The operation requested by the node may include energy on a wireless sensor network including at least one of stopping transmission of the sensing information, retransmitting the sensing information, the sensing period, the transmission period, whether a specific sensor is operated, and whether a remaining battery is used. Device to manage it. The method of claim 6, And when the operation of the specific sensor is whether or not to supply power to the specific sensor, the control unit manages energy on the wireless sensor network to determine whether to supply power to the specific sensor with reference to the operation. The method of claim 1, Apparatus for managing energy in the wireless sensor network further comprises a message generating unit for generating a first metadata including the type and location of the at least one sensor provided. The method of claim 8, And the communication unit manages energy on a wireless sensor network that transmits the first metadata to a higher node on a wireless sensor network. The method of claim 8, And the message generator includes energy included in second metadata received from a lower node on a wireless sensor network in the first metadata. Controlling a sensing period of at least one sensor provided with reference to the received query message and a transmission period of sensing information sensed by the sensor; And And transmitting the sensing information detected in the sensing period in the transmission period according to the control result. And the query message is transmitted only to a specific node through a path determined according to a hierarchical ranking of sensor nodes. The method of claim 11, The query message may include a target node field in which an identifier of a node to which the query message is received is specified; A query type field in which a query target for the query message is specified; A sensing condition field in which a criterion for applying the sensing period is specified; A sensing period field in which the sensing period is specified; A transmission period field in which the transmission period is specified; And Includes at least one of the sensing area field in which the area where the response of the sensing information is requested to be specified, And the query subject comprises at least one of an identifier of the node and a type of sensor. The method of claim 12, And if a reserved word indicating all nodes included in the wireless sensor network is specified in the target node field, the query message is transmitted to all nodes on the wireless sensor network. The method of claim 12, And when the sensing region is specified, the query message is sent only to nodes included in the specified sensing region. The method of claim 11, The query message may include a target node field in which an identifier of a node to which the query message is received is specified; An update operation field specifying an operation requested by the node; And And managing at least one of an update condition field in which a criterion for performing the update operation is specified. The method of claim 15, The operation requested by the node may include energy on a wireless sensor network including at least one of stopping transmission of the sensing information, retransmitting the sensing information, the sensing period, the transmission period, whether a specific sensor is operated, and whether a remaining battery is used. How to manage it. The method of claim 16, And determining whether to supply power to the specific sensor with reference to the operation if the operation of the specific sensor is whether or not power is supplied to the specific sensor. The method of claim 11, And generating first metadata that includes the type and location of the at least one sensor provided. The method of claim 18, Transmitting the first metadata to a higher node on a wireless sensor network. The method of claim 18, Generating the first metadata includes including in the first metadata information included in second metadata received from a lower node on a wireless sensor network. .

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