KR101092779B1 - System and method for pursuit of a lost child - Google Patents

Abstract

There is provided a lost tracking system and a lost location tracking method that can generate a lost signal and provide an initial location of the missing child to quickly and accurately track the lost location. The Mia tracking system is a signal generator that acts as an end device of the ZigBee protocol and is a beacon device carried by a guardian, a beacon device carried by a custodian, or a coordinator of the ZigBee protocol. It may be configured to include an access point for collecting and transmitting information by analyzing the MIA network generation signal received from the signal generator, and a control center for storing and analyzing the information transmitted from the access point. Here, the signal generator configures a communication network with the signal receiver using a general wireless personal area network identifier (PANID), and when the signal receiver becomes incapable of communication, it is determined to be a lost situation and automatically. A communication network may be configured with the access point by using a unique radio personal area network identification number (Rescue PANID) for a lost signal.

Mia, Location Tracking, ZigBee, Wireless Personal Area Network (WPAN), PANID

Description

MIA tracking system and MIA location tracking method {SYSTEM AND METHOD FOR PURSUIT OF A LOST CHILD}

The present invention relates to a method and a system for tracking a location of a lost child, and to provide a lost child tracking system and a lost location tracking method that can be notified immediately of the occurrence of a lost child and provide the initial location of the lost child.

Recently, in order to quickly rescue a rescue requester in situations such as a lost child, abduction and distress (hereinafter referred to collectively as a lost situation) based on the development of wireless communication, the rescue requester receives a predetermined position signal from the rescue requester. A location tracking system that tracks the location of a person is becoming popular. As an example of the location tracking system, a guardian possesses a pair of signal generators carried by a guardian such as a child and a pair of signal receivers, and a lost child tracking system that informs the guardian of the guardian through a signal generator when a lost child occurs.

However, in the case of a lost child tracking system, the guardian must directly operate the signal generator in case of a lost child, so it is cumbersome to know how to use the signal generator in advance. It can be difficult to track the location of the custodian by generating a signal only after much time has elapsed. Likewise, if the guardian does not recognize the situation immediately after the occurrence of the lost child, and the situation is recognized after a certain time has elapsed, the information on the time and place of the lost child is unclear and the accuracy of tracking the location of the lost child is poor and takes a long time. .

In addition, there is a need for a positioning technology that guarantees the reliability of the generation, transmission and reception of emergency signals and the accuracy of the location of signal generation in a lost child tracking system. Currently, the positioning technology has errors ranging from tens of meters to several kilometers. The range is very large. When the positioning technology using the GPS (Global Positioning System) is used, the error is reduced to within a few meters, but it is difficult to use and reliability problem in the complex terrain where the GPS signal does not reach, or in a lot of shaded areas and high-rise buildings. In addition, the existing positioning technology needs to maintain continuous communication with the surrounding communication network, so the more the number of devices participating in the communication, the more the load increases and the processing speed of the entire communication network can be reduced, and the number of repeaters for operating the base station or sensor network increases. There is a problem that should be.

Embodiments of the present invention for solving the above-mentioned problems are to provide a tracking system and method that can generate a lost signal as soon as the lost occurs.

In addition, the present invention provides a lost tracking system and method that can be actively processed by generating a lost signal by generating a lost signal even if the guardian does not directly operate the signal generator.

In addition, it is to provide a lost tracking system and method for providing a location of the guardian when the lost occurs to accurately and quickly track the location of the lost.

According to the embodiments of the present invention for achieving the above object of the present invention, the lost tracking system that can quickly and accurately track the location of the lost by generating a lost signal immediately after the occurrence of the lost and provides the initial position of the lost A signal generator that acts as an end device of the ZigBee protocol and is carried by a guardian, a signal generator that is a beacon device carried by a custodian acting as a coordinator of the ZigBee protocol, the signal generator It may be configured to include an access point for collecting and transmitting information collected by the MIA network signal received from the control center for storing and analyzing the information transmitted from the access point. Here, the signal generator configures a communication network with the signal receiver using a general wireless personal area network identifier (PANID), and if it is determined that a lost situation occurs, the wireless personal area network unique number for the lost signal automatically occurs. A communication network can be configured with the access point using Rescue PANID.

In addition, the signal generator may be operated to enable communication with the access point by increasing a transmission output in the event of a lost event. In addition, the signal receiver measures a distance from the signal generator by using the received strength of the signal received when the communication with the signal generator is incapable, and if the measured distance is increased the control unit for determining the occurrence of the missing situation It can be provided.

The signal receiver may include an alarm unit for notifying the guardian of the occurrence of the lost child when the lost child occurs.

In addition, the access point may be operated in the form of a fixed station of a communication network or a mobile station portable by a person. For example, when the access point is operated in the form of a mobile station, an alarm unit may be provided to notify a user who operates the access point of occurrence of a lost child. The access point may operate as a Zigbee signal packet analyzer or a ZigBee protocol end device using Rescue PANID to analyze a signal generated by a MIA network using Rescue PANID to communicate with a signal generator when a lost child occurs.

On the other hand, according to other embodiments of the present invention for achieving the above object of the present invention, the lost location tracking method for generating a lost signal immediately upon occurrence of lost and provide the initial location of the lost, the general PANID of the Zigbee protocol Forming a communication network between the signal generator and the signal receiver; determining whether the signal generator and the signal receiver are lost in a communication incapacity state; and if it is determined that the lost situation occurs, the signal generator automatically uses the Rescue PANID. Forming a communication network with an access point, analyzing a signal transmitted from the access point to the signal generator, transmitting the information analyzed at the access point to a control center, and storing the information transmitted from the access point. And analyze, predict and track the position of the signal generator It can comprise the steps:

The signal generator transmits signal generator information, and the signal receiver transmits a response signal to the signal generator information. If the response signal is not received for a preset time, it may be determined that a lost situation occurs. The signal generator information may include a unique number of the signal generator and time information of transmitting and receiving the signal generator information.

The signal generator may form a communication network with the access point using the Rescue PANID for a preset time, and may attempt to recombine the communication network using the signal receiver and the general PANID.

In addition, the access point may operate as a Zigbee signal packet analyzer capable of analyzing the signal generated by the lost network so that communication with the signal generator when the lost occurs. Here, the access point, receiving the MIA network generated signal transmitted from the signal generator at a plurality of access points, collecting information recorded in the plurality of access points and the collected information and the signal generator Predicting the location and the movement path of the lost by analyzing the information contained in the signal transmitted from the.

In addition, the access point may operate as an end device of the Zigbee protocol using the Rescue PANID when a lost child occurs. The access point may include receiving a MIA network generation signal transmitted from the signal generator, transmitting a response signal to the MIA network generation signal to form a communication network, and analyzing the received MIA network generation signal. Collecting information and transmitting the collected information is performed.

As described above, according to the embodiments of the present invention, by using the signal strength according to the distance between the guardian and the child having a pair of signal generator and the signal receiver, the lost signal is generated immediately without any additional manipulation. Because of this, it can effectively cope with the occurrence of a lost child.

In addition, ZigBee can be used to form a low-power, low-cost, ultra-compact signal generator. In addition, it has a packet structure suitable for emergency signal transmission and has a high power efficiency. Effective for tracking your location.

In addition, unlike ZigBee, ZigBee enables signal generation and continuous communication regardless of where the ward is.

In addition, when a lost child is provided, a near position of the lost child is provided through a neighboring access point so that the initial position of the lost child can be effectively selected using the active position detection method, and the lost child's location is easy to track.

In addition, not all communication networks are connected as a whole, but only between the guardian and the guardian and participating in the entire network only in the event of a loss, thereby reducing the load on the communication network.

In addition, since the Mia tracking system can be operated using a relatively few access points, it is unnecessary to add a base station or repeater, and the operation efficiency and cost can be reduced.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings, but the present invention is not limited to or limited by the embodiments. In describing the present invention, a detailed description of well-known functions or constructions may be omitted for clarity of the present invention.

Hereinafter, referring to FIG. 1 to FIG. 3, the lost tracking system 100 according to an embodiment of the present invention will be described in detail. For reference, FIG. 1 is a schematic diagram of a lost child tracking system 100 according to an embodiment of the present invention. FIG. 2 is a block diagram illustrating an operation between the signal generator 110 and the signal receiver 120 for explaining the normal operation in the lost tracking system 100 of FIG. 1, and FIG. A block diagram illustrating the operation between the signal generator 110 and the access point 130 to describe the operation of the lost state in the tracking system 100.

The lost child tracking system 100 includes a signal generator 110 carried by a guardian, a signal receiver 120 carried by a guardian, an access point 130, a control center 140, and a control center 140. The tracking team 150 may be configured to track and rescue the location of the lost child at the request of.

The signal generator 110 and the signal receiver 120 are configured as a pair that communicates with each other and is a device capable of confirming whether or not a child is lost by carrying and transmitting signals to each other.

Here, the signal generator 110 operates as a coordinator of the ZigBee protocol and includes a lost signal controller 112, a signal generator 114, and an eye device modem 116. The signal receiver 120 operates as an end device of the Zigbee protocol and is configured to include a signal generator 126, a controller 124, and a guardian device modem 122. Since the signal generator 110 and the signal receiver 120 are short-range communication modules capable of communicating with peripheral devices within a predetermined distance using ZigBee, the signal generator 110 and the signal receiver 120 communicate with ZigBee communications. If you leave the available range, communication will be disabled. The lost tracking system 100 according to the present embodiment reduces the strength of the received signal when the distance between the pair of signal generators 110 and the signal receiver 120 constituted using the short range communication characteristics of Zigbee communication is increased. It is possible to determine that a lost child has occurred from being unable to communicate with each other, and whether the lost person or the guardian does not operate a separate device or not can be notified of the missing child.

Referring to FIG. 2, the signal generator 110 and the signal receiver 120 are constantly in communication with each other, and communication is performed using a general PANID. Here, the PANID is a wireless personal area network identifier (hereinafter referred to as a 'PANID') and is for transmitting a general Zigbee signal. In case of a lost child, a wireless personal area network unique number for the lost child signal (hereinafter referred to as 'Rescue PANID') is used, and communication is performed by designating a part of the PANID to be used in a lost child situation or an emergency situation. That is, the signal generator 110 may selectively participate in two networks of the signal receiver 120 and the access point 130 while switching between the general PANID and the Rescue PANID according to a situation.

In detail, when the signal generator 110 and the signal receiver 120 operate, the lost signal control unit 112 prepares to generate a communication network using a general PANID, and communicates between the signal generator 110 and the signal receiver 120. If this is formed, the signal generator 114 of the signal generator 110 generates the signal generator information T1 and the child device modem 116 transmits the signal generator information T1 to the guardian device modem 122. Here, the signal generator information T1 includes information such as a unique number and a transmission time for identifying the signal generator 110.

The signal receiver 120 uses the signal generator information T1 received from the guardian device modem 122, and the controller 124 obtains device information about the corresponding signal generator 110, and uses the received signal strength to signal The distance to the generator 110 may be determined, or information such as the presence or absence of a signal and a unique number of the signal generator 110 may be collected. If the distance measured by the control unit 124 of the signal receiver 120 is far from the received signal or if the Mia signal generator information (T1) signal does not exist for a predetermined time or more, it is determined that there is a lost situation and the child is lost. Can be informed. For example, an alarm unit (not shown) may be provided that may notify the guardian of a lost child by vibrating, sounding, and lighting or displaying a lamp.

When the signal receiver 120 receives the signal generator information T1, the signal generator 126 transmits an acknowledgment signal (ACK, acknowledge, T2) to the signal generator information T1 to the signal generator 110. Here, the lost signal controller 112 may determine that the lost signal is in a lost state when the response signal T2 is not received even though communication with the signal receiver 120 is attempted for a predetermined time. In this way, the signal generator 110 that does not receive the response signal T2 is switched to a lost state.

In a lost state, the signal generator 110 may provide a location of the lost generator by communicating with a neighboring access point 130.

Referring to FIG. 3, the signal generator 110 switched to the lost state forms a lost personal signal wireless personal area communication network using the Rescue PANID in the lost signal control unit 112, that is, the lost child communication network. 114 and the child device modem 116 send a MIA network generation signal T3 to inform this. Here, the signal generator 110 may increase and transmit the transmission output of the MIA network generation signal T3 when communicating with the access point 130.

The access point 130 continuously receives the MIA network generation signal T3, but continuously receives the MIA network generation signal T3 in the Rescue PANID region. In detail, the access point 130 may include a lost signal transceiver 132, a data detector 134, and a data transmitter 136. The lost signal transmitting / receiving unit 132 receives the lost network generating signal T3 transmitted from the child device modem 116, and when the losing network generating signal T3 is received, the data detecting unit 134 receives the lost network generating signal T3. ) May extract information such as a unique number of the signal generator 110, a transmission / reception time of the MIA generation signal T3, a unique number of the access point 130, and the like. The information extracted from the data detector 134 is transferred to the data transmitter 136 and transmitted to the control center 140 for tracking the location of the lost child using various communication methods such as a mobile communication network or a wireless local area network.

The access point 130 may be configured in the form of a Zigbee packet analyzer or an end device of the Zigbee protocol.

The access point 130 in the form of an end device, like the signal receiver 120, forms a communication network using a general PANID and receives a lost network generation signal T3 through a Rescue PANID. That is, as shown in FIG. 3, when the access point 130 is configured in the form of an end device of the Zigbee protocol, when the MIA generation signal T3 is received, the response signal T4 to the MIA generation signal T3 is received. ), The access point 130 may form a communication network for the signal generator 110 and the lost signal.

On the other hand, the access point 130 in the form of a Zigbee packet analyzer does not need to form a communication network sharing the general PANID with the signal generator 110, and may receive only a lost communication network generation signal T3 through the Rescue PANID. In addition, when the access point 130 is configured in the form of a Zigbee packet analyzer, the MIA network generation signal T3 generated by one signal generator 110 may be simultaneously received by a plurality of access points 130. In this case, a common reception range is calculated using the reception strength of the MIA network generated signal T3 received by the plurality of access points 130, and the position of the signal generator 110 within the calculated range, that is, the location of the lost child. Can be predicted. In addition, the position change of the signal generator 110, that is, the movement path of the lost child, may be analyzed through the information recorded in the plurality of access points 130.

In addition, the access point 130 may be operated in the form of a fixed station 130a or a mobile station 130b of a communication network. That is, the access point 130 may be operated in the form of a fixed station 130a such as a repeater or a base station of a communication network, or in the form of a mobile station 130b that can be carried by a safety officer or employee who manages a corresponding area. Can be operated. And when operating the access point 130 in the form of a mobile station (130b) may be provided with an alarm unit (not shown) for notifying in a manner such as vibration or sound, and lighting of the lamp to notify when the lost.

The control center 140 stores and analyzes the information transmitted from the access point 130 and transmits the information to the tracking team 150 for tracking the location of the lost child so as to track the location of the lost child.

Hereinafter, referring to FIG. 4, a lost tracking method for finding a lost location in the lost tracking system configured as described above will be described.

First, the lost signal generator 110 and the signal receiver 120 form a communication network using the general PANID (S1). Here, the step of forming the communication network is made by selecting the most appropriate frequency band according to the Zigbee protocol, the detailed technical configuration of the frequency band selection and communication method according to the Zigbee protocol can be understood from a known technique and the gist of the present invention. Since detailed descriptions and illustrations are omitted.

Next, in step S2 of determining whether a lost situation occurs, through whether the signal generator 110 has received the response signal T2 for the lost signal generator information T1 signal transmitted from the signal receiver 120. You can judge. Here, in the lost occurrence determination step (S2), when the reception strength of the response signal T2 becomes weak or communication is not possible for a predetermined time in the signal receiver 120, the lost signal control unit 112 detects the lost and normal / lost state. Determining the steps.

Here, the response signal T2 may be received again after a predetermined time, and if the response signal T2 is received after a predetermined time, the existing communication network is maintained. This is because the temporary interruption in communication may occur due to interference or radio interference in the signal generator 110 or the signal receiver 120. In this way, the temporary response signal (T2) non-receipt state due to a communication problem is not a lost situation. Therefore, after a predetermined time, communication is attempted again to check whether the response signal (T2) is received. It can be prevented that it is judged as an occurrence situation. In addition, when the communication signal is attempted again after a certain time and the response signal T2 is not received, it is determined that a lost situation occurs.

Next, when it is determined that the signal generator 110 is a lost situation, the signal generator 110 automatically transmits a lost network generated signal using the Rescue PANID (S3). The lost signal control unit 112 of the signal generator 110 transmits the lost communication network generation signal T4 to the access point 130 using the Rescue PANID by increasing the transmission output.

In this case, since the signal generator 110 becomes a lost state to increase the transmission power to participate in the communication network with the neighboring access point 130, the load added to the communication network can be reduced and the processing speed of the communication network is high. In addition, since the communication network is formed by increasing the output transmitted from the signal generator 110, the additional configuration of the access point 130 to eliminate the shadow area of the repeater is unnecessary, so that the access for the configuration of the lost tracking system 100 is eliminated. The number of operations of the point 130 can be reduced.

Next, the access point 130 continuously receives the MIA network generation signal T3 using the designated Rescue PANID (S10), and analyzes the received MIA network generation signal when the MIA network generation signal T3 is received ( S11).

Here, when the access point 130 is configured as an end device, when the MIA network generation signal T3 is received, a response signal T4 is transmitted to form the communication network. When the access point 130 is configured as a Zigbee packet analyzer, only the MIA network generation signal T3 received using the Rescue PANID transmitted from the signal generator 110 is received.

On the other hand, the signal generator 110 that transmits the MIA network generation signal (T3) for a predetermined time attempts to recombine the communication network with the signal receiver 120 provided by the guardian (S4). At this stage, if the network recombination is successful, the process of maintaining the communication network using the signal receiver and the general PANID of the step S1 is performed. If the recombination fails, the process returns to step S3 to increase the transmission power and transmit the MIA network generation signal T3 to the access point 130 again.

Next, the access point 130 receiving the MIA network generation signal T3 analyzes the received MIA network generation signal T3 (S11) to determine the unique number of the signal generator 110 and the MIA network generation signal T3. Information such as a transmission / reception time and a unique number of the access point 130 is collected. In this process, a plurality of access points 130 may participate in information collection, and the location of the signal generator 110 using a method such as triangulation using the information collected from the plurality of participating access points 130, that is, Predict the location of the lost child.

Next, the information analyzed by the access point 130 is transmitted to the control center 140 (S12). The transmission of information may be various methods such as a mobile communication network or a wireless local area network, and the present invention is not limited thereto. Substantially various communication methods for transmitting and receiving radio waves and information may be used.

Next, the control center 140 stores and analyzes the information transmitted from the access point 130 (S13), and the final reception transmitted from the signal generator 110 based on the received information and processed / stored data. The position of the signal can be determined, and the predicted position is selected as the initial position for tracking the lost position. In addition, the analyzed information may be transmitted to the tracking team 150 to track the location of the lost child at the predicted location (S14).

Here, if the signal is disconnected while the signal receiver 120 and the signal generator 110 maintain communication continuously, it is determined that a loss has occurred and immediately warns the guardian, and the signal generator 110 provided by the lost rescue PANID. By using the communication with the neighboring access point 130 to inform the initial position. Here, the access point 130, which first receives the MIA network generation signal T3 at the signal generator 110, automatically stores and records the location of the signal generator 110 and necessary information. In addition, the control center 140 and the tracking team 150 may track and rescue the lost child quickly using an additional tracking method based on the initial position.

According to embodiments of the present invention, a pair of signal receivers 120 and signal generators 110 are configured to be provided by the guardian and the guardian, respectively, using ZigBee having the characteristics of near field communication. If communication is not performed between the signal generator 110 and the signal receiver 120 by using the signal strength according to the distance between them, it is determined that the lost situation and generates a lost signal, so that the lost can be immediately known. In addition, even if the guardian or the guardian does not operate the device, it is possible to detect and track the occurrence of the missing child to effectively cope with the situation.

In addition, according to the embodiments of the present invention, the advantages of low power, low cost, and small size, which are characteristics of ZigBee, can be efficiently used, and it is easy to carry, and thus, it can be effectively used for tracking the location of lost children and lost children. By using Zigbee, it is possible to generate signals accurately even in indoor or shadowed areas where GPS cannot be used. In addition, ZigBee has a structure suitable for transmitting information configurable as a short packet such as a lost signal, and has a high power efficiency, so that it can maintain a communication state for a long time and continuously communicate until a lost child is found.

In addition, since the near point of the lost child is provided by using the access point 130 around which the lost child is located, the initial position of the missing child can be selected so that the missing child can be accurately and quickly tracked. In addition, since communication is usually performed only between the signal generator 110 and the signal receiver 120, the Mia tracking system can be configured without increasing the load on the communication network and without increasing the cost of adding a repeater.

As described above, the present invention has been described by specific embodiments such as specific components and the like, but the embodiments and the drawings are provided only to help a more general understanding of the present invention, and the present invention is limited to the above-described embodiments. In other words, various modifications and variations are possible to those skilled in the art to which the present invention pertains. Therefore, the spirit of the present invention should not be limited to the above-described embodiments, and all the things that are equivalent to or equivalent to the scope of the claims as well as the claims to be described later belong to the scope of the present invention.

1 is a schematic diagram for explaining a lost child tracking system according to an embodiment of the present invention;

FIG. 2 is a block diagram illustrating a steady state operation in the lost tracking system of FIG. 1. FIG. 2 is a block diagram illustrating an operation between a signal generator and a signal receiver.

FIG. 3 is a block diagram illustrating an operation of a lost state in the lost tracking system of FIG. 1, and a block diagram illustrating an operation between a signal generator and an access point. FIG.

4 is a flowchart illustrating a lost position tracking method according to an embodiment of the present invention.

<Explanation of symbols for the main parts of the drawings>

100: mia tracking system 110: signal generator

112: lost signal controller 114: signal generator

116: child device modem 120: signal receiver

122: guardian device modem 124: control unit

126: signal generator 130: access point

130a: fixed station 130b: mobile station

132: lost signal transceiver 134: data detector

136: data transmission unit 140: control center

150: tracking team

Claims (13)

A signal receiver operating as an end device of the ZigBee protocol and carried by a guardian; A signal generator, which is a beacon device carried by a custodian operating as a coordinator of the Zigbee protocol; An access point that collects and transmits information by analyzing a MIA network signal received by the signal generator; And A control center for storing and analyzing information transmitted from the access point; And the signal generator configures a communication network with the signal receiver using a general wireless personal area network identifier (PANID), and automatically determines that a lost situation occurs. MIA tracking system using a unique number (Rescue PANID) to form a communication network, and in the event of a lost situation increases the transmission output to form a communication network with the access point. delete The method of claim 1, The signal receiver includes a control unit for measuring a distance to the signal generator using the received strength of a signal received when the communication with the signal generator is incapable of communication, and determining that a lost situation occurs when the measured distance increases. Mia tracking system. The method of claim 1, The signal receiver has a lost tracking system having an alarm unit for notifying the guardian when the lost occurs. The method of claim 1, The access point is a missing station tracking system that operates in the form of a fixed station or a mobile station that can be carried by a person. The method of claim 5, The access point operated in the form of a mobile station is a missing track system provided with an alarm unit for notifying the user of the operation of the access point. The method of claim 1, The access point may be a Zigbee signal packet analyzer capable of analyzing a lost network generation signal using a Rescue PANID or an end device of a Zigbee protocol using a Rescue PANID to communicate with a signal generator when a lost child occurs. . Forming a communication network between the signal generator and the signal receiver using the general PANID of the Zigbee protocol; Determining whether the signal generator and the signal receiver have lost in communication failure state; Automatically establishing a communication network with an access point using the Rescue PANID in the signal generator when it is determined that a lost situation occurs; Analyzing a signal transmitted from the signal generator at the access point; Transmitting the information analyzed at the access point to a control center; And Storing and analyzing information transmitted from the access point, and predicting and tracking the position of the signal generator; Including, The signal generator transmits signal generator information and the signal receiver transmits a response signal to the signal generator information to form a communication network using a PANID. If the response signal is not received for a predetermined time, the location of the lost location tracking method. delete The method of claim 8, And the information includes a unique number of the signal generator and time information of transmitting and receiving the signal generator information. The method of claim 8, The signal generator forms a communication network with the access point using the Rescue PANID for a predetermined time, and attempts to recombine the communication network using the signal receiver and the general PANID. The method of claim 8, The access point operates as a Zigbee signal packet analyzer capable of analyzing the signal generated by the lost network to enable communication using the signal generator and the Rescue PANID when the lost occurs. Receiving, at a plurality of access points, a MIA network generated signal transmitted from the signal generator; Collecting information recorded in the plurality of access points; And Analyzing the collected information and information included in the signal transmitted from the signal generator to predict the location and movement path of the lost child; Mia location tracking method comprising a. The method of claim 8, The access point acts as an end device of the Zigbee protocol using the Rescue PANID in the event of a lost child, Receiving a MIA network generation signal transmitted from the signal generator; Transmitting a response signal to the MIA network generation signal to form a communication network; Analyzing the received MIA network generation signal and collecting information; And Transmitting the collected information; Mia location tracking method comprising a.

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