KR101185378B1 - The portable device for caching RF-ID tag data and method thereof - Google Patents

Abstract

A portable device capable of reading an RF-ID tag is disclosed. The portable device includes an RF-ID reader unit for detecting tag information stored in an RF-ID tag, a memory unit for storing tag information detected by the RF-ID reader unit, and an RF-ID tag with valid tag information. When the reading command is input, the tag information stored in the memory unit is read and provided. When the RF-ID tag reading command is input while the tag information is invalid, the RF-ID reader unit is controlled to read the RF-ID tag again. It includes a control unit. The controller may determine whether tag information is valid based on time and location. As a result, unnecessary tag reading work can be reduced, power consumption can be prevented, and tag information checking time can be shortened.

RF-ID tag, tag information, memory part, valid time, effective distance

Description

Portable device for caching RF-ID tag information and method thereof {The portable device for caching RF-ID tag data and method}

1 is a schematic diagram illustrating an RF-ID reading process according to movement of a portable device in an environment in which a plurality of RF-ID tags exist;

2 is a block diagram for explaining the configuration of a portable device according to the present invention;

3 to 5 are block diagrams illustrating the configuration of a portable device according to various embodiments of the present disclosure, respectively.

6 is a schematic diagram illustrating a case where the RF-ID reader unit is implemented as a separate reader chip;

7 is a schematic diagram illustrating an example of a software structure of a control unit used in the portable device of FIG. 2;

8 is a flowchart illustrating a method of reading an RF-ID tag in a portable device according to an embodiment of the present invention;

9 is a flowchart illustrating a method of reading an RF-ID tag in a portable device according to another embodiment of the present invention.

Explanation of symbols on the main parts of the drawing

100: portable device 110, 210, 310, 410: RF-ID reader unit

120, 220, 320, 420: memory unit 130, 230, 330, 430: control unit

240, 340, 440: input unit 250, 450: timer unit

350, 460: distance measuring unit 470: communication unit

480: display unit

The present invention relates to a portable device and a method for caching RF-ID tag information. More particularly, the tag information detected when a reading command is re-input within a predetermined time while the reading tag information is stored. The present invention relates to a portable device and a method of using the detected tag information as it is if valid.

With the development of wireless technology, various RF-ID (Radio Frequency IDentification) systems have been used, ranging from simple prepaid bus cards to parking passes and laboratories. RF-ID systems were developed due to changes in production methods, changes in consumer consciousness, advances in culture and technology, and the elimination of shortcomings of barcodes and magnetic cards. The RF-ID system basically consists of an RF-ID tag and an RF-ID reader. RF-ID tags are a type of contactless card. In other words, unlike a contact card, the user does not need to insert a tag into a reader. Accordingly, since there is no mechanical contact, there is no friction or damage, and there is little pollution or environmental influence.

The types of RF-ID system are the active type which supplies power to the battery embedded in the tag, and the electromagnetic wave transmitted from the RF-ID reader according to the method of driving the IC embedded in the tag. ) Can be divided into passive type to induce induced current. In addition, the RF-ID system may be divided into a high frequency system and a low frequency system according to the frequency band used. Low frequency systems use frequency signals in the tens of megahertz bands. Therefore, it has a short read distance of about 10 to 15 cm. High frequency systems, on the other hand, use frequency signals in the vicinity of the 900 MHz band. Therefore, the read distance is increased to about 1 ~ 4 m.

Meanwhile, in recent years, efforts have been made to increase the usability of portable devices by adding RF-ID reader functions to portable devices such as mobile phones, PDAs, notebook PCs, and the like. According to this, it is possible to simply check the data stored in the various RF-ID tag existing in the vicinity using their mobile phone. For example, in a department store, if each product is attached with an RF-ID tag that stores product information, price, and manufacturer information, people who want to shop can use their mobile phones to display each RF-ID tag. You can check tag information. In order to use the RF-ID system in this way, the read distance must be guaranteed at least several meters. Therefore, it is desirable to implement a high frequency system.

On the other hand, in the conventional portable device to which the RF-ID reading function is added, if a reading command for a previously read RF-ID tag is input again during execution of a predetermined application program, the corresponding RF-ID tag should be read again. That is, by driving the RF-ID reader chip provided in the portable device, and transmits electromagnetic waves to the surroundings. Each RF-ID tag present within a predetermined distance around the portable device generates an induced current when electromagnetic waves are received. The IC in the RF-ID tag is driven by the generated induction current to transmit predetermined tag information. However, the positional change of the portable device is generally slow. Therefore, within a predetermined time, the possibility of reading the same RF-ID tag increases. That is, when a reading command is input again within a predetermined time, an unnecessary reading process may be performed. As a result, when trying to check tag information of the RF-ID tag read before the predetermined time again, there is a problem that the tag information checking time becomes longer according to unnecessary tag reading.

In particular, when implemented as a high-frequency RF-ID system as described above, power consumption is large in the process of transmitting and receiving electromagnetic waves. Accordingly, there is a problem in that battery consumption increases due to unnecessary reading processes. This problem can be a fatal defect in portable devices where the available battery capacity is limited.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problem, and an object of the present invention is to prevent unnecessary RF-ID tag reading from being repeated by caching and using detected RF-ID tag information. In addition, the present invention provides a portable device and a method for reducing power consumption and shortening tag information provision time.

In order to achieve the above object, a portable device according to an embodiment of the present invention, the RF-ID reader unit for detecting tag information stored in the RF-ID tag, the tag information detected by the RF-ID reader unit And a controller configured to read and provide the tag information stored in the memory unit when a reading command for the RF-ID tag is input while the tag information is valid.

Preferably, the apparatus may further include an input unit for receiving a reading command for the RF-ID tag.

In this case, if a reading command for the RF-ID tag is input while the tag information is not valid, the controller controls the RF-ID reader to re-detect tag information stored in the RF-ID tag.

The controller may discard the redetected tag information when the redetected tag information is overlapped with tag information previously stored in the memory, and store the redetected tag information in the memory if not. have.

In addition, if it is determined that the tag information is valid, the controller may determine the validity level of the tag information and provide the tag information together with the tag information.

More preferably, the portable device may further include a display unit which displays a message corresponding to the validity level and the tag information.

On the other hand, the control unit may determine that the tag information is in a valid state if a predetermined validity time elapses from the time when the tag information is detected.

Specifically, the portable device may further include a timer that counts a time that elapses from the time when the RF-ID reader detects the tag information. In this case, if the counted time exceeds the valid time, the controller controls the RF-ID reader to redetect the tag information of the RF-ID tag in response to the reading command, and the counted time is If it is less than or equal to the valid time, the tag information stored in the memory unit may be detected in response to the reading command.

In this case, if the counted time is less than or equal to the valid time, the controller may determine the validity degree by using a difference between the counted time and the valid time.

Also preferably, the control unit may determine that the tag information is valid when the current position is within a predetermined effective distance from the point where the tag information is detected.

Specifically, the portable device may further include a distance measuring unit that measures a moving distance from the point at which the tag information is detected to the point at which the reading command is input. In this case, when the movement distance exceeds the effective distance, the controller controls the RF-ID reader to redetect the tag information of the RF-ID tag in response to the reading command, and the movement distance is valid. If the distance is less than or equal to, the tag information stored in the memory unit may be detected in response to the reading command.

In this case, if the moving distance is less than or equal to the effective distance, the controller may determine the validity degree by using a difference between the moving distance and the effective distance.

More preferably, the portable device further performs a wireless communication with a server corresponding to the tag information to receive a predetermined data and a display unit for displaying data received by the communication unit under control of the controller. It may also include.

Meanwhile, when storing the tag information, the memory unit may additionally store information about a time point and a point where the tag information is detected.

The memory unit may delete the stored tag information when a predetermined time elapses after the tag information is stored.

Meanwhile, when the reading command is input, the RF-ID reader unit may detect tag information of all RF-ID tags existing within a read distance for a predetermined time.

Preferably, when the reading command is input through the input unit while a predetermined application program is being executed, the controller is configured to selectively detect only tag information of the RF-ID tag corresponding to the application program. The ID reader may also be controlled.

On the other hand, the portable device according to another embodiment of the present invention, the RF-ID reader unit for detecting the tag information stored in the RF-ID tag, the tag information detected by the RF-ID reader unit and the RF-ID tag reading And a memory unit for storing additional information related to a job, and a controller for selecting and deleting invalid tag information among tag information stored in the memory unit according to the additional information.

In this case, the additional information may include at least one or more information of a time, a location, an effective time, and an effective distance of detecting the tag information from the RF-ID.

Preferably, the control unit is further configured to, when the time elapsed from the tag information detection time of the additional information exceeds the valid time, and the distance from the tag information detection position to the current position among the additional information is effective. If at least one or more of the cases exceeding the distance occurs, it may be determined that the tag information is invalid.

On the other hand, the RF-ID tag reading method of a portable device according to an embodiment of the present invention, (a) when a reading command is input, determining whether the tag information previously detected and stored is valid and (b) the tag If the information is valid, providing the stored tag information.

Preferably, (c) if it is determined that the tag information is in an invalid state, reading the RF-ID tag, and detecting and providing tag information stored in the RF-ID tag.

Preferably, the method may further include (d) discarding the redetected tag information when the detected tag information is duplicated with previously stored tag information, and storing the redetected tag information when the detected tag information is not duplicated. .

Meanwhile, in step (a), it may be determined whether the tag information is valid using a time elapsed from when the tag information is detected.

In this case, the step (a) includes the steps of counting time elapsed from the point of time when the tag information is detected, comparing the counted time with a predetermined valid time, and if the counted time is less than or equal to the valid time. And determining that the tag information is valid, and determining that the tag information is invalid when the counted time exceeds the valid time.

More preferably, when it is determined that the tag information is valid, the method may further include determining and providing an effective degree of the tag information by using a difference between the counted time and the valid time.

Meanwhile, in step (a), it may be determined whether the tag information is valid by using the distance from the point where the tag information is detected to the current position.

In this case, the step (a) may include measuring the moving distance from the point at which the tag information is detected to the point at which the reading command is input and the tag information is valid if the moving distance is less than a predetermined effective distance. And determining that the tag information is invalid when the moving distance exceeds the effective distance.

More preferably, when it is determined that the tag information is valid, the method may further include determining and providing an effective degree of the tag information by using a difference between the moving distance and the effective distance.

The RF-ID tag reading method may further include receiving data and displaying the received data by performing wireless communication with a server corresponding to the tag information.

The method may further include storing information on a time point and a point of detecting the tag information.

More preferably, the method may further include deleting the stored tag information when a predetermined time elapses after the tag information is stored.

On the other hand, in step (c), it is possible to detect the tag information of all (RF) ID tag existing within the read distance.

In addition, in the step (c), when the reading command is input while a predetermined application program is being executed, only tag information of the RF-ID tag corresponding to the application program may be selectively detected.

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

1 is a schematic diagram showing the configuration of an RF-ID system according to an embodiment of the present invention. According to FIG. 1, the RF-ID system includes a plurality of RF-ID tags 10, 20, 30, and a portable device 100. Each RF-ID tag 10, 20, 30 may be attached to a movie poster, various products, food, and the like.

The portable device 100 includes an RF-ID reading chip (not shown) capable of reading an RF-ID tag. Accordingly, tag information stored in the RF-ID tag existing within a predetermined read distance may be checked. As shown in FIG. 1, when the user of the portable device 100 inputs a reading command at a point (a) where the tag 1 10 and the tag 20 20 are within the read distance, the portable device 100 moves around the electromagnetic wave. By transmitting the information of the tag 1, 2 (10, 20) is read. The read tag information is provided to an application program currently running in the portable device 100. Meanwhile, the read tag information is stored in a memory inside the portable device 100.

After that, when the portable device 100 moves in the direction of the arrow to reach the point (b), the tags 1, 2 (10, 20) still exist within the read distance at the point (b). Therefore, when the reading command is input again at the point (b), the tag information is read and provided to the application program without having to transmit electromagnetic waves to the surroundings.

On the other hand, when the portable device 100 continuously moves and reaches point (c), tags 2 and 3 (20 and 30) are present within the read distance. Therefore, when the reading command is input at the point (c), it is preferable to transmit the electromagnetic wave to the surrounding area, newly detect the tag information, and then provide the tag information to the application program.

In this case, the predetermined valid time may be set in consideration of the moving speed of the portable device 100. Accordingly, if a reading command is input within the valid time, it is assumed that the tag existing within the read distance is the same as before, and the read information may be used as it is. On the other hand, if the expiration time is exceeded, there is a possibility that a new tag exists within the read distance, and therefore, it is preferable to newly read the surrounding RF-ID tag.

Meanwhile, the user of the portable device 100 may stop moving around the RF-ID tag or roam around the tag. Therefore, by setting a predetermined effective distance, it is possible to implement to determine whether to re-detect tag information compared to the moving distance from the point where the RF-ID tag previously read. That is, if the tag is moved within the effective distance from the point where the RF-ID tag was previously read, the stored tag information may be used as it is. On the other hand, if the effective distance is off, the tag information can be newly detected and used. On the other hand, as a prerequisite for considering the effective distance as described above, the portable device 100 should be provided with a position reading device such as a GPS (Global Positioning System).

2 is a block diagram showing the configuration of the present portable device 100. According to FIG. 2, the portable device 100 includes an RF-ID reader 110, a memory 120, and a controller 130.

The RF-ID reader 110 reads tag information recorded in the RF-ID tag within the read distance.

The controller 130 stores and manages tag information read by the RF-ID reader 110 in the memory 120.

In this case, in addition to the tag information, the memory unit 120 may further store additional information about a time, a location, an effective time, an effective distance, etc., which read the RF-ID tag.

The controller 130 checks the additional information stored in the memory unit 120, determines whether the tag information is valid, and manages the tag information according to the determination result. Specifically, if it is determined to be valid tag information, it is kept as it is. If it is determined to be invalid tag information, the tag information is deleted. In addition, when tag information read by the RF-ID reader unit 110 overlaps with tag information previously stored in the memory unit 120, the tag information is discarded without changing the tag information. The validity of the tag information may be determined based on time or distance. On the other hand, if the tag information is valid, the controller 130 can determine the validity degree and provide it with the tag information. The degree of validity can be determined by comparing the detection time or detection position of tag information with the tag reading command input time or input position. Specific validity determination method will be described later.

FIG. 3 is a block diagram illustrating a configuration of a portable device according to an embodiment of determining whether tag information is valid based on time. The portable device according to FIG. 3 includes an RF-ID reader 210, a memory 220, a controller 230, an input 240, and a timer 250.

The input unit 240 serves to receive a reading command from the outside. That is, the user may input a reading command by selecting a reading menu for reading a peripheral tag in a process of executing a predetermined application program on the portable device or by manipulating a predetermined button provided in the portable device main body.

When the reading command is input, the RF-ID reader unit 210 reads tag information recorded in the RF-ID tag within the read distance. To this end, the RF-ID reader 210 may include an antenna (not shown), a demodulation circuit (demodulation circuit), and the like. That is, when a reading command is input, after outputting the electromagnetic wave through the antenna, the electromagnetic wave output from the RF-ID tag is received. The demodulation circuit demodulates the received electromagnetic wave to detect tag information.

On the other hand, the application program may be provided from various operators such as mobile communication providers (SKT, KTF, etc.), retailers (Lotte Department Store, Wal-Mart, etc.), product manufacturers (LG, Samsung, etc.). Therefore, when a reading command is input on a predetermined application program, it may be designed to read only the RF-ID tag provided by the provider who provided the corresponding program. In this case, by checking the identifier of the received tag information, it is possible to selectively detect only predetermined tag information.

The controller 230 stores the tag information read by the RF-ID reader 210 in the memory 220. Thereafter, the controller 230 may directly display the tag information on the screen or provide the tag information to a predetermined application program. The controller 230 may control the timer 250 to detect information about a time point at which the tag information is read, and then store the information about the information in the memory unit 220.

The memory unit 220 may be implemented as a cache memory. The cache memory refers to a high-speed special memory designed to smoothly transmit instructions or data frequently processed by a predetermined computer processor. When a predetermined time elapses after the tag information is stored, the memory unit 220 may delete the tag information under the control of the controller 230.

Meanwhile, the timer 250 counts the time that elapses from the tag reading time.

In this state, when the reading command is re-input through the input unit 240, the controller 230 determines whether the time counted by the timer unit 250 exceeds a preset valid time. If less than the valid time, the controller 230 determines that the tag information is valid. Accordingly, the tag information stored in the memory unit 220 is read and used.

On the other hand, if the valid time is exceeded, the controller 230 determines that the corresponding tag information is not valid. Accordingly, the RF-ID reader unit 210 is controlled to read the RF-ID tag again and redetect the tag information.

Meanwhile, when the tag information is valid, the controller 230 determines the validity degree of the tag information. Specifically, the validity level is determined using the difference between the time counted by the timer 250 and the valid time. That is, assuming that the valid time is 5 seconds, if the counted time is 1 second, it is determined to be very valid tag information, and if the counted time is 5 seconds, it is relatively less valid tag information. In this case, the controller 230 may divide the difference from the valid time into a plurality of sections and provide the validity corresponding to each section together with the tag information. That is, when the difference from the effective time is 5 ~ 3sec, it is good, when it is between 3 ~ 2 sec, and when it is between 2 ~ 0 sec, it is regarded as bad and a text message or graphic image corresponding thereto is provided. Can be.

4 is a block diagram illustrating a configuration of a portable device according to an embodiment of determining whether tag information is valid based on a distance. According to FIG. 4, the portable device includes an RF-ID reader 310, a memory 320, a controller 330, an input 340, and a distance measurer 350.

The distance measuring unit 350 serves to measure the distance moved from the tag reading point using the location information. Specifically, the distance measuring unit 350 may be implemented to measure a moving distance by receiving and comparing location information from a GPS satellite using a GPS location reader.

The controller 330 stores the information on the reading point in the memory unit 320 when the RF-ID tag reading is performed according to the reading command. In such a state, when the reading command is re-entered, it is determined whether the tag information is valid by checking whether the moving distance between the previous point and the local point is less than the effective distance. Specifically, if the effective distance is exceeded, it is determined that the tag information is not valid and the reading operation is newly performed. If it is less than the effective distance, the stored tag information is determined to be valid, and the stored tag information is used as it is.

Even in this case, when the tag information is valid, the validity level can be determined and provided. That is, assuming that the effective distance is 5m, when the moving distance is 1m, the difference from the effective distance is 4m. On the other hand, if the moving distance is 4.5m, the difference from the effective distance is 0.5m. The controller 330 may divide the difference from the effective distance into a plurality of sections and provide an effective degree corresponding to the corresponding section together with the tag information. That is, when the difference between the effective distance is 5 to 3m, it is good, when it is between 3 to 2m, and when it is between 2 to 0m, it is regarded as bad and a text message or graphic image corresponding thereto can be provided. .

Operation of the remaining components except for the distance measuring unit 350 and the control unit 330 is the same as the embodiment of FIG. 3, and thus, further description thereof will be omitted.

5 is a block diagram showing a configuration of a portable device according to another embodiment of the present invention. According to FIG. 5, the portable device includes an RF-ID reader unit 410, a memory unit 420, a controller 430, an input unit 440, a timer unit 450, a distance measuring unit 460, and a communication unit 470. ) And the display unit 480.

The operations of the RF-ID reader unit 410, the memory unit 420, the control unit 430, the input unit 440, the timer unit 450, and the distance measuring unit 460 are described in the embodiments of FIGS. 3 and 4. Therefore, duplicate description is omitted.

The communication unit 470 serves to communicate with a predetermined server. In detail, the communication unit 470 may perform communication according to a Bluetooth, WLAN, and UWB standard. That is, when tag information is detected from the RF-ID tag, the data request packet is transmitted to the server corresponding to the tag information. The server transmits predetermined data corresponding to the tag information to the communication unit 470 according to the data request packet. The server can be a web server operated by each tag manufacturer. Accordingly, the data transmitted from the server may be information on price information, manufacturer information, expiration date information, handling precautions, and the like for the tagged product.

The display 480 serves to display data received by the communication unit 470 under the control of the controller 430. That is, when tag information is detected while executing a predetermined application program, the controller 430 receives data from a server corresponding to the tag information, and then displays an application window including the corresponding data. RF-ID tags are small and low cost, so there is a hardware limitation that can not store a large amount of data. Therefore, it is desirable to store only minimal tag-specific information in the RF-ID tag and to provide various other data from a separate server to display on the screen.

In addition, the display unit 480 may also provide a text message or a graphic image for displaying the validity determined by the controller 430 together with the tag information. Since the effective degree grasping method has been described above, duplicate descriptions are omitted.

Meanwhile, according to the above embodiments, the RF-ID reader unit 110, 210, 310, 410, the memory unit 120, 220, 320, 420, and the controller 130, 230, 330, 430 are one portable. It is described as included within the device, in which case the portable device 100 may be implemented with an RF-ID reader chip.

Alternatively, the portable device 100 may be implemented as a portable communication device such as a mobile phone. In this case, the RF-ID reader unit 110, 210, 310, 410 is implemented as a separate reader chip itself, the control unit 130, 230, 330, 430 is a microprocessor inside a portable device such as a mobile phone Can be implemented. Accordingly, the reader chip may be used in the form of being connected to the portable device.

The memory units 120, 220, 320, and 420 may be provided on the reader chip side or on the portable device side according to various embodiments of the present disclosure.

6 is a schematic diagram for explaining an embodiment of a form used in connection with an external reader chip. According to FIG. 6, the external reader chip 510 includes an RF-ID reader 511 and a memory 512, and may be coupled to the portable device 520. The connection between the reader chip 510 and the portable device 520 may be implemented as a USB interface, a parallel interface, or the like.

When the reading command is input through various input means included in the portable device 520 while the reader chip 510 is connected, the tag information stored in the RF-ID tag within the read distance is detected as described above. The detected tag information may be displayed through various display means provided in the portable device 520.

In this case, if valid tag information is stored in the memory unit 512 provided in the reader chip 510, the portable device 520 may use the tag information stored in the memory unit 512 as it is. Same as the examples.

7 is a schematic diagram illustrating a software structure of the controller 130, 230, 330, 430 according to an embodiment of the present invention. According to FIG. 7, the software structures of the controllers 130, 230, 330, and 430 include an RFID reader interface 710, an RFID reader protocol 720, an RFID middleware 730, and the like. RFID application (RFID: 740) can be divided.

The RFID reader interface 710 receives tag information detected by the RF-ID readers 110, 210, 310, and 410. The RFID reader protocol 720 manages the memory units 120, 220, 320, and 420 to record, read, and filter tag information. The valid time and the effective distance may also be recorded in the memory unit 120, 220, 320, 420 by the RFID reader protocol 720. The RFID middleware 730 provides a function of managing tag information detected by the RF-ID reader unit 110, 210, 310, and 410, and serves to associate with the RFID application 740. That is, as described above, when a reading command is input through the RFID application 740, the tag information corresponding to the RFID application 740 is detected, and then the tag information is corresponding to the tag information using the communication unit 470. The predetermined data is received from the server and provided to the RFID application 740 together with the tag information. The RFID application 740 performs various functions by using tag information transmitted through the RFID middleware 730.

8 is a flowchart illustrating a RF-ID tag reading method of a portable device according to an embodiment of the present invention. Referring to FIG. 8, when a reading command for the RF-ID tag is input (S810), the tag information is detected by reading the RF-ID tag in the surrounding read distance (S820). Next, the detected tag information is stored (S830) and then provided to the application program corresponding to the tag information (S840).

In this state, when the reading command is input again (S850), it is determined whether the tag information is valid. In this case, the validity of the tag information may be determined based on time or distance.

Specifically, first, it is determined whether the time elapsed from the previous detection time of the tag information to the present exceeds the valid time (S850). If it is less than the valid time, it is determined that the stored tag information is valid, and the tag information is provided to the application program as it is (S890).

On the other hand, if the effective time is exceeded, it is again determined whether the effective distance is exceeded (S870). If the effective distance is less than the stored tag information is provided to the application program (S890), if the effective distance is exceeded by reading the RF-ID tag to detect the tag information. Accordingly, the newly detected tag information is provided to the application program (S880).

9 is a flowchart illustrating a method of reading an RF-ID tag in a portable device according to another embodiment of the present invention. According to FIG. 9, when an RF-ID tag reading command is input (S910) and tag information is detected (S920), the detected information is stored (S930).

Next, the predetermined data corresponding to the detected tag information is received from the predetermined server corresponding to the detected tag information (S940). Accordingly, a predetermined application program is executed to display the received data (S950).

After that, when the reading command is input again (S960), the valid time is exceeded (S970), the effective distance is exceeded (S975), and the RF-ID tag is read again (S980) or the previously stored tag information is read. It becomes (S985). Since the process after re-input of the reading command is the same as that of FIG. 8, a detailed description thereof will be omitted. As a result, data corresponding to the tag information is displayed using a predetermined application program (S990).

8 and 9, the validity of the tag information is determined in consideration of the effective distance as well as the effective time. However, depending on the characteristics of the portable device to be implemented, it may be determined whether to re-detect tag information by considering only one of the valid time and the effective distance.

As described above, according to the present invention, after storing the tag information detected previously, if a tag information reading command is input, it is determined whether the tag information is redetected using at least one of an effective time and an effective distance, and thus unnecessary tags. Information detection can be prevented. Thus, power consumption of the portable device can be reduced. In addition, since the time required for redetection can be reduced, the tag information can be provided to the application program in a short time.

In addition, although the preferred embodiments of the present invention have been shown and described above, the present invention is not limited to the specific embodiments described above, and the technical field to which the present invention pertains without departing from the gist of the present invention as claimed in the claims. Of course, various modifications can be made by those skilled in the art, and these modifications should not be individually understood from the technical spirit or the prospect of the present invention.

Claims (34)

An RF-ID reader unit for detecting tag information stored in an RF-ID tag; A memory unit for storing tag information detected by the RF-ID reader unit; And And a controller configured to read and provide the tag information stored in the memory unit when a reading command for the RF-ID tag is input while the tag information is valid. The controller may detect the tag information stored in the RF-ID tag by controlling the RF-ID reader if a reading command for the RF-ID tag is input while the tag information is invalid. Portable devices. The method of claim 1, And an input unit configured to receive a reading command for the RF-ID tag. delete The method of claim 1, The control unit, And if the redetected tag information is duplicated with tag information previously stored in the memory unit, discarding the redetected tag information, and if not, storing the redetected tag information in the memory unit. . 5. The method of claim 4, The control unit, And determining the validity of the tag information and providing the tag information together with the tag information when it is determined that the tag information is valid. Claim 6 has been abandoned due to the setting registration fee. The method of claim 5, And a display unit for displaying the message and the tag information corresponding to the validity level. The method of claim 5, The control unit, And if the predetermined validity time elapses from the time when the tag information is detected, determining that the tag information is valid. The method of claim 7, wherein And a timer unit for counting a time elapsed from the time point at which the RF-ID reader detects the tag information. The control unit controls the RF-ID reader unit to redetect tag information of the RF-ID tag in response to the reading command if the counted time exceeds the valid time, and the counted time is the valid time. The portable device according to claim 1, further comprising detecting tag information stored in the memory unit in response to the reading command. Claim 9 has been abandoned due to the setting registration fee. 9. The method of claim 8, The control unit, And if the counted time is less than or equal to the valid time, determining the validity degree by using a difference between the counted time and the valid time. The method of claim 5, The control unit, And if the current position is within a predetermined effective distance from the point where the tag information is detected, determining that the tag information is valid. The method of claim 10, And a distance measuring unit configured to measure a moving distance from the point at which the tag information is detected to the point at which the reading command is input. If the moving distance exceeds the effective distance, the controller controls the RF-ID reader to redetect the tag information of the RF-ID tag in response to the reading command, and if the moving distance is less than or equal to the effective distance, And tag information stored in the memory unit in response to the reading command. Claim 12 is abandoned in setting registration fee. 12. The method of claim 11, The control unit, And when the moving distance is less than or equal to the effective distance, determining the validity degree by using a difference between the moving distance and the effective distance. Claim 13 was abandoned upon payment of a registration fee. The method of claim 1, A communication unit which performs wireless communication with a server corresponding to the tag information and receives predetermined data; And And a display unit configured to display data received by the communication unit under the control of the controller. Claim 14 has been abandoned due to the setting registration fee. The method of claim 1, The memory unit, Claim 15 is abandoned in the setting registration fee payment. The method of claim 1, The memory unit, And when the predetermined time elapses after the tag information is stored, deleting the stored tag information. Claim 16 has been abandoned due to the setting registration fee. 3. The method of claim 2, The RF-ID reader unit, And when the reading command is input, detects tag information of all RF-ID tags existing within a read distance for a predetermined time. Claim 17 has been abandoned due to the setting registration fee. 3. The method of claim 2, The control unit, When the reading command is input through the input unit while a predetermined application program is being executed, the RF-ID reader unit is controlled to selectively detect only tag information of the RF-ID tag corresponding to the application program. Portable device. An RF-ID reader unit for detecting tag information stored in an RF-ID tag; A memory unit for storing tag information detected by the RF-ID reader unit and additional information related to the RF-ID tag reading operation; And And a controller configured to select and delete invalid tag information among tag information stored in the memory unit according to the additional information. The additional information includes at least one or more information of time, location, valid time, valid distance at which the tag information is detected from the RF-ID, The controller may be configured to: when the time elapsed from the tag information detection time of the additional information exceeds the valid time, and the distance from the tag information detection position to the current position among the additional information exceeds the effective distance. And if at least one or more of the cases occur, the tag information is determined to be invalid. delete delete In the RF-ID tag reading method of a portable device, (a) if a reading command is input, determining whether previously detected and stored tag information is valid; (b) if the tag information is valid, providing the stored tag information; And (c) if it is determined that the tag information is not valid, reading the RF-ID tag, and detecting and providing tag information stored in the RF-ID tag. Tag reading method. delete Claim 23 has been abandoned due to the setting registration fee. 22. The method of claim 21, (d) discarding the detected tag information when the detected tag information is duplicated with previously stored tag information, and storing the detected tag information when the detected tag information is not duplicated. Reading method. Claim 24 is abandoned in setting registration fee. 22. The method of claim 21, The step (a) And determining whether the tag information is valid by using a time elapsed from when the tag information is detected. Claim 25 is abandoned in setting registration fee. 25. The method of claim 24, The step (a) Counting a time elapsed from the time point of detecting the tag information; Comparing the counted time with a predetermined validity time; And And determining that the tag information is valid when the counted time is less than or equal to the valid time, and determining that the tag information is invalid when the counted time is greater than the valid time. Tag reading method. Claim 26 is abandoned in setting registration fee. 26. The method of claim 25, If it is determined that the tag information is valid, using the difference between the counted time and the valid time, grasping and providing a validity level of the tag information; RF-ID tag reading method further comprising: . Claim 27 was abandoned upon payment of a registration fee. 22. The method of claim 21, The step (a) And determining whether the tag information is valid by using a distance from the point where the tag information is detected to the current position. Claim 28 has been abandoned due to the set registration fee. The step (a) Measuring a moving distance from a point at which the tag information is detected to a point at which the reading command is input; And And determining that the tag information is valid when the moving distance is less than or equal to a predetermined effective distance, and determining that the tag information is invalid when the moving distance is greater than the valid distance. Reading method. Claim 29 has been abandoned due to the setting registration fee. The method of claim 28, If it is determined that the tag information is valid, using the difference between the moving distance and the effective distance to determine the degree of validity of the tag information and providing; RF-ID tag reading method further comprising. Claim 30 has been abandoned due to the set registration fee. 22. The method of claim 21, Receiving data by performing wireless communication with a server corresponding to the tag information; And Displaying the received data; RF-ID tag reading method further comprising. Claim 31 has been abandoned due to the setting registration fee. 22. The method of claim 21, Claim 32 is abandoned due to the set registration fee. 22. The method of claim 21, And deleting the stored tag information when a predetermined time has elapsed after the tag information is stored. Claim 33 was abandoned upon payment of a registration fee. 22. The method of claim 21, In step (c), RF-ID tag reading method characterized by detecting the tag information of all RF-ID tag existing within the read distance. Claim 34 was abandoned upon payment of a registration fee. 22. The method of claim 21, Step (c) is, If the reading command is input while a predetermined application program is being executed, RF-ID tag reading method, characterized in that selectively detecting only the tag information of the RF-ID tag corresponding to the application program.

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