KR200361351Y1 - Dual band terminal for possessor search in a area - Google Patents

Abstract

The present invention relates to a hybrid dual-band portable terminal for searching for a location of a user in a space, and has a tag type mobile terminal that periodically outputs a radio recognition frequency to a user entering a specific space in which a plurality of cell antennas are installed. By capturing the output signal of the mobile terminal through the antennas, it analyzes and calculates the current position of the mobile terminal holder through the installation position and signal acquisition time of the cell antennas, and the mobile terminal directly detects the situation where the mobile terminal is lost from the holder. It is possible to detect the lost situation of the terminal immediately to the control center is characterized in that it is possible to immediately deal with the situation.

Description

DUAL BAND TERMINAL FOR POSSESSOR SEARCH IN A AREA

The present invention relates to a hybrid dual-band portable terminal for searching a user's location in a space. More specifically, a tag type mobile terminal for periodically outputting a radio recognition frequency to a user entering a specific space having a plurality of cell antennas installed therein. By carrying out and capturing the output signal of the mobile terminal through the cell antennas to analyze and calculate the current position of the mobile terminal holder through the installation position and the signal acquisition time of the cell antenna, but the situation that the mobile terminal is lost from the holder The present invention relates to a hybrid dual-band portable terminal for detecting a user's location in a space that enables the portable terminal to directly detect a lost situation of the terminal and immediately notify the control center.

Radio frequency identification (RFID) technology integrates the use of electromagnetic or electrostatic coupling within the radio frequency of the electromagnetic spectrum to identify objects, animals or humans, and does not require direct contact or scanning in the visible band. Due to the lack of an advantage, it is increasingly used in the industry as a technology to replace the barcode.

This RFID system consists of three components: an antenna transceiver and a tag, also called a transponder. The antenna uses radio frequency propagation to carry a signal to activate the transponder. When the transponder is activated, the transponder transmits the data it has to the antenna. This process can range from as simple as passing through a door to something as complex as a database-driven sales transaction.

Depending on the frequency used, low frequency RFID systems using 30KHz to 500KHz are used in short transmission areas of about 1.8m or less.

On the other hand, in modern society, families often go out on weekends, holidays, and vacations, or they often find crowded places such as amusement parks, parks and department stores. In crowded places such as these, it is not uncommon to find a child accompanied by some careless care of parents.

Indeed, because children are curious and not fully formed, their perceptions are easily out of the caregiver's reach in places where a large number of crowds gather at once or in places unfamiliar to them, and many children become lost.

Currently, there are various ways to find a lost child to guardian in case of such a lost child. In this way, the method of detecting the location of the user's mobile phone through GPS technology is actually implemented. have.

However, the biggest problem of the GPS method is that the GPS system cannot detect this when the user's mobile phone is located indoors in actual application, and thus many restrictions are applied to the application of the system.

In other words, the outdoor space can exhibit the function to some extent, but it is true that the use of the location detection function is insufficient in the indoor or outdoor complex space or the fully closed indoor space.

In addition, in the location search method using such a mobile phone, if the infant child who may be the main target of the location search service loses the mobile phone in the space, the location search data itself becomes meaningless. May occur frequently, but due to the characteristics of the service system subject, it is impossible to prepare a special countermeasure, which causes a great problem that users' trust in the location search service is lowered.

The present invention is to solve the above problems, its purpose is to carry a tag type mobile terminal that periodically outputs a radio recognition frequency to a user entering a specific space where a plurality of cell antennas are installed and through the cell antennas By capturing the output signal of the mobile terminal, it analyzes and calculates the current position of the mobile terminal holder through the installation location and signal acquisition time of the cell antennas, but the mobile terminal can directly detect the situation where the mobile terminal is lost from the mobile terminal holder. It is to provide a hybrid dual-band mobile terminal for detecting the location of the user in the space to immediately notify the control center of the terminal loss situation to enable immediate response.

1 is an exemplary view showing a system environment to which a mixed dual band portable terminal according to the present invention is applied.

2 is a view showing a first embodiment of a hybrid dual band portable terminal according to an embodiment of the present invention.

3 is a view showing a second embodiment of a hybrid dual band portable terminal according to an embodiment of the present invention;

Figure 4 is a view showing a variety of uses of the hybrid dual-band portable terminal according to the present invention.

5 is a first conceptual diagram of a system environment to which a mixed dual band portable terminal of the present invention is applied.

6 is a second conceptual diagram of a system environment to which a mixed dual band portable terminal of the present invention is applied.

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

10: mobile terminal 11: control unit

12: status display LED 13: passive tag

14: active RF transceiver 15: battery

17: loss detection unit 17a: infrared transmitter

17b: infrared receiver 17c: optical fiber cable

17d: contact switch 17e: lead connection

17f: current detector 20: access registration terminal

30: cell antenna 40: location display terminal

50: operation management server

In order to achieve the above object, a hybrid dual-band portable terminal for searching a location of a user in a space according to an aspect of the present invention is configured to provide a location search service for searching a location of a user in a space through a plurality of cell antennas. In the mobile terminal for user's own handset, which performs data transmission and reception for registration of unique tag ID through local area communication and periodically transmits a tag location signal by an internal RF transmission / reception antenna to a driving power of its own battery for long distance communication. A passive tag (13) for transmitting and receiving data related to registration of a tag ID and function control data relating to starting of a position signal transmitting function and starting of a loss detection function through communication; Loss detection unit for detecting a situation in which the user's wearing state of the mobile terminal is released through the user holding means of the mobile terminal using the internal power source according to the function control data received from the passive tag, and generating a loss detection signal ( 17); In response to the function control data received from the passive tag, periodically transmits a tag position signal indicating its position through long-distance communication, and outwardly through long-distance communication when a loss detection signal is generated from the loss detection unit periodically. An active RF transceiver 14 for transmitting and receiving tag state control data from the cell antenna; A status display LED (12) flashing to indicate a lost state, a group departure or a group call state of the portable terminal according to the tag state control data received from the active RF transceiver; A control unit (11) for performing a function control by connecting the passive tag (13), the loss detecting unit (17), the active RF transceiver (14), and the status display LED (12); And a battery 15 for providing driving power for performing the functions of the units 11, 12, 13, 14, and 17. Characterized in that it comprises a.

Preferably, the loss detection unit 17, the infrared transmission unit 17a for generating a predetermined infrared ray continuously or at a predetermined interval using the power of the battery 15; An optical fiber cable (17c) connected to the infrared receiver to guide the propagation of the infrared rays, and exposed to the outside and used as a holding means for carrying the portable terminal by the holder of the portable terminal; And an infrared receiver 17b which receives the infrared rays transmitted from the infrared transmitter through the optical fiber cable, and generates a loss detection signal for a lost situation of the user's portable terminal when the set infrared rays are not received. Characterized in that it comprises a.

More preferably, the loss detection unit 17 includes: a contact switch 17d for extracting a predetermined current directly from the battery 15; A wire connection portion 17e connected to the contact switch to form a closed circuit for the progress of the current, and exposed to the outside and used as a holding means for carrying the portable terminal by the holder of the portable terminal; And a current detector 17f that detects a current progression state that progresses through the wire connection unit 17e and generates a loss detection signal for a lost state of the portable terminal of the user if the current progression that is set is not detected. Characterized in that it comprises a.

More preferably, the holding means of the loss detecting unit 17 is configured by any one of a wristband method, a neckline method and a fastener method to detect a loss situation of the portable terminal according to whether the holding means is damaged. do.

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

Hereinafter, the present invention possesses a tag type mobile terminal that periodically outputs a wireless recognition frequency to a user who enters a specific space where a plurality of cell antennas are installed, and captures an output signal of the mobile terminal through the cell antennas. Analyze and calculate the current position of the mobile terminal holder through the installation location and signal acquisition time of the mobile terminal, but the mobile terminal can directly detect the situation that the mobile terminal is lost from the holder to immediately report the departure of the terminal to the control center. It will be described as a preferred embodiment of a hybrid dual-band portable terminal for detecting the user location in the space to enable immediate situation response, but the technical spirit of the present invention is not limited or limited to this and various modifications will be made by those skilled in the art Of course it can.

1 is an exemplary view showing a system environment to which a mixed dual band portable terminal according to the present invention is applied, and FIG. 2 is an exemplary view showing a mixed dual band portable terminal according to an embodiment of the present invention.

The system environment to which the present invention is applied to the hybrid dual-band portable terminal for searching a user's location in a space includes a mobile terminal 10, an access registration terminal 20, a cell antenna 30, a location display terminal 40 and an operation management server. It consists of 50.

Referring to Figure 1 in more detail with respect to the system environment to which the hybrid dual-band mobile terminal for the user location search in the space according to an embodiment of the present invention in more detail, the space to which the present invention is applied to enter the corresponding It can be applied to a variety of amusement parks, amusement parks, golf courses, department stores, stadiums, swimming pools, construction sites that move freely within the space.

The mobile terminal 10 is a device having a unique and non-replicable ID which is a personal wearable device which is to be carried by each person entering the space. Unlike the conventional tag device, the mobile terminal 10 is a dual-band tag device that extends the output of a transmission signal in a non-contact manner by using a function of repeatedly transmitting a predetermined signal at a predetermined time and using an HF or UHF band. Compatible with passive RFID tags.

As illustrated in FIGS. 2 and 3, the portable terminal 10 includes a passive tag 13 for transmitting and receiving data and function control data related to registration of a tag ID through short-range communication in an HF or UHF band, and a UHF band. It transmits a tag position signal including a tag ID and related data periodically indicating its location through a long-distance communication of the loss and a loss detection signal indicating a user loss of the corresponding mobile terminal and tag state control data from the cell antenna 30 to be described later Active RF transceiver 14 for receiving the state and the state of the RFID tag 10 in accordance with the tag state control data received from the RF transceiver 14 (where the state of the mobile terminal is a group leaving state or a group call state or A state indicating a lost state of the portable terminal and a detailed description thereof will be described later. A loss detection unit 17 for actively detecting a loss situation of the holder of the large terminal 10 and generating a loss detection signal according to the loss situation of the portable terminal; and each of the units 12, 13, 14, and 17. It includes a control unit 11 and the battery 15 to control.

The tag location signal transmitted to the outside through the active RF transceiver 14 to inform the current location of the mobile terminal 10 includes the corresponding tag ID and related data, and starts transmission at regular intervals. And the stop operation is repeatedly performed. The output frequency of the tag position signal is determined through the function control data received through the passive tag 13 and is individually applied according to the environment of the space where the system is installed. In this embodiment, the tag position signal is output at a long distance through the power of its own battery every 10 seconds. However, the present invention is not limited to the illustrated output frequency.

In addition, the RF transceiver 14 receives the function control data for call back transmitted through the cell antennas 30 from an external control system and transmits it to the controller 11 according to the corresponding function control data. Functions such as signal transmission, status display, loss detection, etc. of the mobile terminal 10 can be controlled in real time.

Power for outputting the long-range tag position signal periodically transmitted to the active RF transceiver 14 to the outside is provided by itself by the drive power of the battery 15 of course.

In addition, the loss detection unit 17 detects a loss situation of the mobile terminal 10 and transmits it to the outside through the active RF transceiver 14, and the loss detection unit detects such a loss situation by itself. 2, as shown in FIG. 2, the first embodiment includes an infrared transmitter 17a, an infrared receiver 17b, and an optical fiber cable 17c.

That is, according to the first embodiment of the hybrid dual-band portable terminal of the present invention, the infrared transmitter 17a and the infrared receiver 17b are operated by the power supply from the battery 15, the infrared transmitter 17a ) And the infrared receiver 17b are connected through the optical fiber cable 17c, and the infrared transmitter 17a continuously generates the predetermined infrared rays through the optical fiber cable 17c or at predetermined intervals with the start of operation of the portable terminal. In this case, the infrared receiver 17b connected to the optical fiber cable 17c receives the transmitted infrared rays.

At this time, the optical fiber cable 17c is used as a holding means for the mobile terminal holder to carry the mobile terminal 10 to the body stably so that the infrared reception through the optical fiber cable 17c is no longer an infrared receiver ( If it is not detected at 17b), the portable terminal 10 recognizes the situation as a cut state of the optical fiber cable 17c, that is, a lost status of the portable terminal of the user.

On the other hand, according to the second embodiment of the hybrid dual-band portable terminal of the present invention, the loss detection unit 17 comprises a contact switch 17d, a conductor connecting portion 17e and a current sensor 17f, The contact switch 17d receives a predetermined power supply from the power supply battery 15 and the conducting line connecting portion 17e connecting the same forms a closed circuit, and the corresponding conducting line connecting portion 17e and the contacting switch start with the operation of the portable terminal. The predetermined current flows continuously through 17d.

At this time, the wire connecting portion 17e is used as a holding means for the mobile terminal holder to carry the mobile terminal 10 to the body stably so that the current flow through the wire connecting portion 17e is no longer a current detector 17f. If not sensed through), the portable terminal 10 recognizes the situation as the open state of the wire connecting portion 17e, that is, the lost situation of the user's portable terminal.

In the above-described embodiments and drawings, the loss detection unit 17 of the hybrid dual-band portable terminal of the present invention has been described and illustrated as an infrared transmission / reception method and a closed wire method, but the principle of the present invention is not limited thereto.

Meanwhile, various examples of the portable terminal having such a loss detector 17 are shown in FIG. 4.

Referring to FIG. 4A, a configuration example of reducing the possibility of loss by wearing the portable terminal 10 on a user's wrist is illustrated. At this time, the wristband worn on the wrist 10 includes the optical fiber cable 17c of the first embodiment or the conducting wire connecting portion 17e of the second embodiment. The lost situation of the portable terminal can be immediately detected by itself.

Referring to FIG. 4B, a configuration example of reducing the possibility of loss by hanging the portable terminal 10 on the user's neck is illustrated. At this time, the portable terminal 10 includes the optical fiber cable 17C of the first embodiment or the conducting wire connecting portion 17e of the second embodiment, which is included in the neckline hanging around the neck. The lost situation of the portable terminal can immediately detect itself.

Referring to FIG. 4C, a configuration example of reducing the possibility of loss by attaching the mobile terminal 10 to a user's clothes is illustrated. At this time, the portable terminal 10 is cut off by fixing the clothes pin or the fixing ring attached to the clothes by including the optical fiber cable 17c of the first embodiment or the conducting wire connecting portion 17e of the second embodiment. Through the status, the lost situation of the mobile terminal can be immediately detected by itself.

In the above-described embodiments and drawings, the external configuration of the loss detection unit 17 of the hybrid dual-band portable terminal of the present invention has been described and illustrated in an accessory-type wristband method and a neckband method and a fastener method that are easy to carry by the user. The principle of the invention is not limited thereto.

On the other hand, the access registration terminal 20 is a device that is installed in the entrance that is in charge of the entrance to the space, the passive tag of the portable terminal 10 when entering and exiting the user having the portable terminal 10 ( 13) by contactlessly receiving the tag ID from the user in charge of the registration setting and registration registration of the user, while entering the function control data for transmitting the tag position signal and the function control data for the loss detection to the corresponding mobile terminal (10) By transmitting the tag position signal transmission function of the mobile terminal 10 to be periodically turned on, while the loss detection function of the corresponding mobile terminal 10 is to be started, the tag position signal transmission function of the mobile terminal 10 also when exiting To turn off.

That is, the entrance registration terminal 20 receives the tag ID and the related data in a non-contact manner from the passive tag 13 of the portable terminal 10 through the band of the HF or UHF when the user enters the portable terminal 10. Register and transmit it to the operation management server 50 to be described later to notify the entrance of the mobile terminal 10 in the space, and when the user exits from the passive tag 13 of the mobile terminal 10 of the HF or UHF The tag ID and the related data are received in a non-contact manner through the band to release the registration of the corresponding mobile terminal 10 and transmit the same to the operation management server 50 to notify the exit of the portable terminal 10 in the space.

At this time, the access registration terminal 20 is set to the group ID registration by setting the tag ID of the user and the tag ID of the entrance party of the user at the same time when entering the group, for example, of the family user In this case, all of the family members are set as a group, and the tag IDs of all the families are set as one group, and the plurality of portable sets set as a group by transmitting information about the tag group setting to the operation management server 50 as well. Management of the terminal 10 can be made.

In addition to the illustrated family group, such a group may be variously applied to a friend group, a visiting group group, a cheering group, a shopping group, a work team group, etc. according to the environment to which the present invention is applied.

On the other hand, the cell antenna 30 is a device that receives the tag position signal from the mobile terminal 10 that initiated the periodic tag position signal transmission operation through the access registration terminal 20 to the size of the space installed According to the present invention, the cell antenna 30 receives a tag position signal transmitted by the active RF transceiver 14 of the mobile terminal 10 through its RF transceiver antenna and includes the tag position signal in a corresponding tag position signal. The extracted tag ID is added to the tag ID signal, and the acquisition time data obtained by capturing the corresponding tag position signal and the antenna ID of the cell antenna itself are added, and the radio is transmitted to the operation management server 50 as tag capture information.

That is, the cell antenna 30 receives the tag position signal of the mobile terminal 10 that is periodically transmitted, extracts the tag ID, and adds the signal acquisition time data and the acquisition antenna ID to configure tag acquisition information. Transmitting to the operation management server 50 performs a data collection operation to be utilized in the user location search of the operation management server 50.

In addition, when the portable terminal 10 recognizes a lost situation of the portable terminal 10 through the loss detector 17, the portable terminal 10 transmits a loss detection signal according to a corresponding lost situation through an active RF transceiver 14. By transmitting, the surrounding cell antenna 30 receives the corresponding loss detection signal, extracts the tag ID, and adds the signal acquisition time data and the acquisition antenna ID to configure the loss detection information. The loss detection information is transmitted to the operation management server 50.

That is, the operation management server 50 can grasp in real time the loss of the user's mobile terminal, which may be a vulnerability of the location search function, through such loss detection information, and inform the lost situation of the lost or lost party of the mobile terminal in advance. This can significantly reduce the possibility of location search failure due to the loss of a mobile terminal in case of an emergency such as a lost child and can improve the service reliability of the location search service to space users.

At this time, the cell antenna 30 should be able to capture the tag position signal transmitted from the active RF transceiver 14 of the portable terminal 10 or a signal according to the loss situation, the corresponding portable terminal in the installation In consideration of the signal reaching distance and interference phenomenon of (10), the maximum separation distance between cell antennas is preferably within at least 50m.

An example of the configuration of the cell antenna 30 is shown in FIGS. 5 and 6.

5 is an example of the cell antenna 30 installation configuration in an environment having an irregular and wide application space, such as an amusement park or an amusement park, and FIG. 6 in an environment having a regular and standardized indoor space such as a department store. The example of the cell antenna 30 installation structure is shown.

In addition, when the cell antenna 30 is installed outdoors such as an amusement park or an amusement park, it is preferable that the cell antenna 30 is additionally installed in a street lamp in a space for ease of power supply.

The operation management server 50 collects and manages location data of the mobile terminal 10 that flows through the cell antenna 30 through the cell antenna 30, and detects departure of the user's entrance group through the location information of the users. In addition, this information is notified to the location display terminal 40 and the departed user, and the tag acquisition information of the cell antenna 30 accumulated when the group defector location search request is made through the location display terminal 40 to be described later. Search for the location of the defector and perform the function of providing the location information of the defector through the position display terminal 40.

In addition, the operation management server 50 receives the lost situation of the mobile terminal 10 in the space through the cell antenna 30 and informs the collecting agent in the space or the location display terminal 40 to be described later, It performs a function of providing the location information of the collected terminal when the request of the search for the lost terminal through the location display terminal 40.

That is, the operation management server 50 continuously receives and accumulates acquisition information from the cell antennas 30, and is currently present through acquisition time information, acquisition tag ID information, and acquisition cell antenna information included in the acquisition information. It functions to determine the location of the mobile terminal (10).

In addition, by analyzing the location of each of the identified mobile terminal 10 to recognize a situation that a particular user falls more than a predetermined distance from the user's entrance group and treats this situation information as a group departure predictor, the location display terminal 40 The management personnel can promptly monitor the situation and respond to the situation, and in addition, the tag state control data is transmitted through the cell antenna 30 so that the group departure predictor can recognize the group departure situation. And transmits the status display LED 12 of the user's portable terminal 10 to blink.

Further, upon requesting a location search for the group defector from the location display terminal 40, the current location information of the group members is transmitted to the location display terminal 40 according to the tag ID of the search requester.

On the other hand, the location display terminal 40 is a component that is applied to the MIA or unmanned kiosk in the space, when the space users lost their party (entrance group members) in the space of the location display terminal 40 When the portable terminal 10 is close to the RFID transceiver, the position display terminal 40 receives the tag ID and related data from the portable terminal 10 through the short-range communication method, and connects it to the operation management server 50 connected thereto. And transmits the location information of the group defector retrieved from the operation management server 50 to the search requester, while the lost or lost entry group member of the mobile terminal is lost to the location display terminal 40. When requesting the location information of the portable terminal 10, the location of the lost portable terminal 10 retrieved from the operation management server 50 This function provides the beam to the search requester.

Looking at the function of the operation management server 50 in response to the group departure search request, the operation management server 50 receives the tag ID information of the search requester requesting a group departure search from the position display terminal 40 The tag IDs of the party set as the search requester and the group are extracted, and through this, the current location information (location information of the mobile terminal possessed by members) of the entrance group members to which the search requester belongs is extracted and the corresponding location display terminal 40 Will be sent to.

In addition, when looking at the function of the operation management server 50 in response to the mobile terminal lost or lost mobile terminal search request of the entry group member of the lost, the operation management server 50 is lost terminal from the position display terminal 40 When receiving the identification information of the lost person requesting the search or receiving the tag ID information of the member of the loss group, the current location information of the lost terminal is directly extracted or the search requester (provided the tag ID information) belongs. The current location information of the portable terminals possessed by the members of the admission group is extracted and transmitted to the corresponding location display terminal 40.

As described above, the method of calculating the current location of the continuously moving users by using the position and the capturing time of the cell antenna 30 capturing the mobile terminal 10 possessed by the users in the space first captures the corresponding user at the same time. By applying the principles of triangulation and proximity to the position of the cell antenna 30 as shown in Figs. 5 and 6, it is possible to first estimate the approximate location of the user.

Next, in the cell antennas 30 which respectively capture the same tag position signal of the user portable terminal 10, the degree of difference in the acquisition time is substituted by calculating the proximity of each cell antenna of the user to calculate which cell the actual user uses. Accurate distance data can be calculated regarding whether the antenna is located closer to the antenna.

The present invention described above is possible to those skilled in the art to which the present invention belongs, various substitutions, modifications and changes can be made within the scope without departing from the spirit of the present invention and the above-described embodiments and attached It is not limited to drawing.

As described above, the hybrid dual-band portable terminal for detecting a user's location in a space according to the present invention uses a passive tag and a UHF band capable of transmitting / receiving data through contactless local area communication of an HF or UHF band using its own battery power source. It is equipped with an active RF transceiver that performs long-distance function of self ID replication position signal through it.It is possible to set and change the position signal transmission function using the corresponding passive tag, and to periodically repeat self ID replication position signal through active RF transceiver. By making the transmission, it is possible to immediately apply to the location search service through the antenna, there is an effect that can be freely and easily set the transmission setting of the various position signals for each application type.

In addition, when the user of the mobile terminal possesses a loss detection unit for recognizing the lost situation of the mobile terminal of the holder itself through the loss detection information to identify the user's mobile terminal loss that may be a vulnerability of the location search function in real time In addition, it can notify the lost or lost party of the mobile terminal in advance, which can significantly reduce the possibility of the location search failure due to the loss of the mobile terminal in case of emergency such as a lost child. It also has the effect of improving service reliability.

In addition, the loss detection unit can be implemented in the form of an infrared transmission / reception through a fiber optic cable and a closed circuit through a current flow, so that the user's possession of the portable terminal can be variously configured in the form of a necklace, a wristband, or a fixture. According to the propensity of the location search space to which the portable terminal is applied, there is an effect of providing various spatial matching portable terminals.

Claims (4)

For location search service to search the user's location in space through multiple cell antennas, it performs data transmission and reception for registration of unique tag ID through short-range communication of internal tag and internally by driving power of its own battery for long distance communication. In a mobile terminal for user possession that periodically transmits a tag position signal by the RF transmitting and receiving antenna of, A passive tag (13) for transmitting and receiving data related to registration of a tag ID and function control data relating to starting of a position signal transmitting function and starting of a loss detection function through near field communication; Loss detection unit for detecting a situation in which the user's wearing state of the mobile terminal is released through the user holding means of the mobile terminal using the internal power source according to the function control data received from the passive tag, and generating a loss detection signal ( 17); In response to the function control data received from the passive tag, periodically transmits a tag position signal indicating its position through long-distance communication, and outwardly through long-distance communication when a loss detection signal is generated from the loss detection unit periodically. An active RF transceiver 14 for transmitting and receiving tag state control data from the cell antenna; A status display LED (12) flashing to indicate a lost state, a group leaving or a group calling state of a corresponding mobile terminal according to the tag state control data received from the active RF transceiver; A control unit (11) for performing a function control by connecting the passive tag (13), the loss detecting unit (17), the active RF transceiver (14), and the status display LED (12); And A battery 15 providing driving power for functioning of each of the units 11, 12, 13, 14, 17; Including, including the passive tag 13 for short-range communication 13 and the active RF transceiver 14 for long-distance communication at the same time, the dual-band mixed dual band for the user location search in the space, it is possible to communicate appropriately with the outside Mobile terminal. The method of claim 1, The loss detection unit 17, An infrared ray transmitter 17a for generating predetermined infrared rays continuously or at predetermined intervals using the power of the battery 15; An optical fiber cable (17c) connected to the infrared receiver to guide the propagation of the infrared rays, and exposed to the outside and used as a holding means for carrying the portable terminal by the holder of the portable terminal; And An infrared receiver 17b which receives the infrared rays transmitted from the infrared transmitter through the optical fiber cable, and generates a loss detection signal for a lost situation of the user's portable terminal when the set infrared rays are not received; Mixed dual-band portable terminal for user location search in the space comprising a. The method of claim 1, The loss detection unit 17, A contact switch 17d for extracting a predetermined current directly from the battery 15; A wire connection portion 17e connected to the contact switch to form a closed circuit for the progress of the current, and exposed to the outside and used as a holding means for carrying the portable terminal by the holder of the portable terminal; And A current detector 17f that detects a current progression state that is conducted through the wire connection unit 17e and generates a loss detection signal for a loss state of the portable terminal of the user if the current progression that is set is not detected; Mixed dual-band portable terminal for user location search in the space comprising a. The method according to any one of claims 1 to 3, The holding means of the loss detecting unit 17 is an accessory form, consisting of one of the wristband method, the neckline method and the fastener method, characterized in that the space to detect the lost situation of the portable terminal according to the damage of the possession means Hybrid dual band handset for searching my user location.