KR100797175B1 - RFID-reader for offering RFID-tag related information and method thereof - Google Patents

Abstract

Provided are an RFID reader for providing RFID tag related information and a method for providing RFID tag related information thereof. The RFID reader includes a communication unit for receiving an RF signal from an RFID tag, a control unit for calculating position information of the RFID tag based on the RF signal received from the communication unit, and a position information of the RFID tag calculated by the control unit. And a display information generator for displaying on the display. Accordingly, even when several tags are located around the reader, the user can distinguish between IDs read by the readers corresponding to the IDs of the respective tags.

RFID, location information, distance information, direction information, product information

Description

RDF-reader providing RDF-tag related information and its RDF-tag related information providing method {RFID-reader for offering RFID-tag related information and method

1 shows an example of an RFID system to which the present invention is applicable;

2 is a block diagram of a reader for providing distance information of a tag and a tag according to an embodiment of the present invention;

3 is a flowchart provided to explain a method for providing distance information of a tag according to an embodiment of the present invention;

4A and 4B are views provided in detail of a method for providing distance information of a tag;

5 is a block diagram of a reader for providing direction information of a tag and a tag according to another embodiment of the present invention;

6 is a flowchart provided to explain a method for providing direction information of a tag according to another embodiment of the present invention;

7A and 7B are views provided in a description of a method of providing direction information of a tag;

8A and 8B are views provided to explain a method for providing distance information and direction information of a tag;

9 is a block diagram illustrating a reader for providing article information of a tag according to another embodiment of the present invention;

10 is a flowchart provided to explain a method for providing article information of a tag according to an embodiment of the present invention;

11A is a view provided in a description of a method of providing article information of a tag;

FIG. 11B is a diagram provided to explain a method for providing distance information and direction information of a tag and article information of a tag.

Explanation of symbols on the main parts of the drawings

100, 100-1, 100-2, 100-3: Tag 200: Reader

110: tag memory 120: tag communication unit

220: reader communication unit 230: measurement unit

240: control unit 260: display information generation unit

The present invention relates to a radio frequency identification (RFID) -reader and a method for providing RFID-tag related information. More particularly, the present invention relates to RFID-tag related information, wherein the position information of an RFID-tag and an article with an RFID-tag are attached. An RFID-reader and an RFID-tag related information providing method capable of providing information about the same.

With the development of wireless technology, a variety of RFID (Radio Frequency IDentification) systems have been used, ranging from simple prepaid bus cards to parking passes and laboratories.

RFID is basically achieved by RF signal exchange between reader and tag. That is, when the tag ID stored in the tag memory is output in the form of an RF signal, the reader receives and confirms it.

Until now, it has been common for RFID systems to have readers fixed and tags moved. In this case, only one tag is accessed by the reader at a time, so that the reader reads only one tag ID at a time. As a result, the user can clearly identify which tag is the ID read by the reader.

However, in recent years, it is possible to assume that the tag is fixed and the reader moves. In this case, when the reader moves to the point where several tags are located nearby, the reader reads several tag IDs at once. In this case, the user may not be able to distinguish the IDs read by the readers corresponding to the IDs of the respective tags.

The present invention has been made to solve the above problems, an object of the present invention, when there are a plurality of tags in the vicinity of the reader, in order to facilitate the identification of the tags, RFID-related tag information, RFID The present invention provides an RFID reader and a method for providing RFID-tag related information, which can provide a tag's position information and information on an RFID-tagged article.

According to the present invention for achieving the above object, an RFID reader comprises: a communication unit for receiving a radio frequency (RF) signal from an RFID tag; A control unit for calculating position information of the RFID tag based on the RF signal received from the communication unit; And a display information generator configured to display and process the position information of the RFID tag calculated by the controller on a display.

The position information of the RFID tag may include at least one of distance information which is information about a distance between the RFID tag and the RFID reader and direction information which is information about a direction from the RFID reader to the RFID tag. It is preferable to include.

The RFID reader may further include a measuring unit measuring a magnitude of the RF signal received by the communication unit, and the controller may further include the distance information using the magnitude of the RF signal measured by the measuring unit. And at least one of the direction information.

The controller may be further configured to calculate at least one of the distance information and the direction information by using the average of the magnitudes of the RF signals measured over a number of times.

In addition, the position information of the RFID tag, taking into account the relationship between the position of the RFID tag on the earth, the address where the RFID tag is attached, the position of the other tag existing in the vicinity of the RFID tag. At least one of an absolute position, which is an unlocated position, and a relative position in consideration of a relationship with a position with respect to another article present around the RFID-tag.

The location information of the RFID tag is stored in a memory provided in the RFID tag, and the location information of the RFID tag stored in the memory is included in the RF signal received by the communication unit.

The display information generation unit may be configured to display and display the position information of the RFID tag calculated by the controller on the display using the symbolic display of the RFID tag and the symbolic display of the RFID reader. It is preferable.

The controller extracts article information which is information about the RFID-tagged article included in the RF signal received by the communication unit, and the display information generation unit extracts the article information extracted by the controller. May be displayed on the display together with the position information of the RFID tag.

On the other hand, RFID-reader according to the present invention, the communication unit for receiving a radio frequency (RF) signal containing the item information which is information on the RFID-tag attached article from the RFID-tag; A controller which extracts the article information from the RF signal received by the communication unit; And a display information generator configured to display and process the article information extracted by the controller on a display.

The article information included in the RF signal received by the communication unit is preferably stored in a memory provided in the RFID tag.

On the other hand, according to the present invention, the RFID-tag, a memory that stores the product information that is information about the RFID-tag attached article; And a communication unit generating a radio frequency (RF) signal including the article information stored in the memory and transmitting the RF signal to the RFID reader.

The memory may further store language information of the article information, and the communication unit may generate an RF signal including the article information and the language information stored in the memory and transmit the generated RF signal to the RFID reader.

On the other hand, RFID-tag related information providing method according to the present invention, a) receiving a radio frequency (RF) signal from the RFID-tag; b) calculating position information of the RFID tag based on the received RF signal; And c) displaying the calculated position information of the RFID tag.

The position information of the RFID tag may include at least one of distance information which is information about a distance between the RFID tag and the RFID reader and direction information which is information about a direction from the RFID reader to the RFID tag. It is preferable to include.

In addition, the step b), the step of measuring the magnitude of the received RF signal; And calculating at least one of the distance information and the direction information by using the measured magnitude of the RF signal.

In the step b), it is preferable to calculate at least one of the distance information and the direction information by using the average of the magnitudes of the RF signal measured over several times.

In addition, the position information of the RFID tag, taking into account the relationship between the position of the RFID tag on the earth, the address where the RFID tag is attached, the position of the other tag existing in the vicinity of the RFID tag. At least one of an absolute position, which is an unlocated position, and a relative position in consideration of a relationship with a position with respect to another article present around the RFID-tag.

The location information of the RFID tag is stored in a memory provided in the RFID tag, and the location information of the RFID tag stored in the memory is included in the RF signal received in step a). .

In addition, the step c), by using the symbolic display of the RFID-tag and the symbolic display of the RFID-reader, it is preferable to display the position information of the RFID-tag calculated in the step b) urbanly. Do.

The RFID-tag related information providing method includes: extracting item information, which is information about an item to which the RFID tag is attached, included in the received RF signal; And displaying the extracted article information together with the position information of the RFID tag.

On the other hand, according to the present invention, a method for providing RFID-tag related information, the method comprising the steps of: receiving from the RFID-tag a Radio Frequency (RF) signal containing the article information which is information on the article attached to the RFID-tag; Extracting the article information from the received RF signal; And displaying and processing the extracted article information.

The article information included in the received RF signal is preferably stored in a memory provided in the RFID tag.

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

The RFID system to which the present invention is applicable consists of a plurality of 'RFID readers' (hereinafter abbreviated as 'leaders') and a plurality of 'RFID tags' (hereinafter abbreviated as 'tags'). do. 1 illustrates an RFID system composed of one reader 200 and three tags 100-1, 100-2, and 100-3 as an example of an RFID system to which the present invention is applicable.

The reader 200 receives IDs of the tags 100-1, 100-2, and 100-3 by transmitting and receiving tags 100-1, 100-2, and 100-3 with a radio frequency (RF) signal. You can read it and inform the user.

In addition, the reader 200 is tag related information, in which the location information of the tags 100-1, 100-2, and 100-3 and the tags 100-1, 100-2, and 100-3 are attached. Information about the items can be informed to the user. Here, the position information of the tag includes' information about the distance between the tag and the reader '(hereinafter abbreviated as' distance information of the tag') and 'information about the direction from the reader to the tag' (hereinafter, ' Direction information '.

Hereinafter, a process in which the reader 200 provides distance information of a tag as tag related information will be described in detail with reference to FIGS. 2 and 3. 2 is a block diagram of a reader and a tag providing distance information of a tag according to an embodiment of the present invention.

FIG. 2 corresponds to a block diagram illustrating the RFID system shown in FIG. 1 in more detail. However, since the configurations of the tags 100-1, 100-2, and 100-3 shown in FIG. 1 are the same, only one tag having a reference numeral '100' is shown in FIG. 2 for convenience of description. The description of the tag 100 will be replaced by the description of all the tags 100-1, 100-2, and 100-3.

Referring to FIG. 2, the tag 100 includes a tag memory 110, a tag communication unit 120, and a tag antenna 130. The tag ID 110 stores a tag ID. The tag communication unit 120 generates an RF signal including a tag ID stored in the tag memory 110 and transmits the generated RF signal to the reader 200 through the tag antenna 130.

Meanwhile, the reader 200 includes a reader antenna 210, a reader communication unit 220, a measurement unit 230, a controller 240, a reader memory 250, a display information generator 260, and a display 270. Equipped.

The reader communication unit 220 receives and demodulates the RF signal transmitted from the tag 100 through the reader antenna 210, converts the demodulated signal into a digital signal, and transmits the demodulated signal to the controller 240 to be described later.

The measurement unit 230 measures the magnitude of the RF signal received by the reader communication unit 220 and transmits the measurement result to the control unit 240.

The control unit 240 calculates distance information of the tag 100 using the measurement result received from the measuring unit 230. In addition, the controller 240 extracts the ID of the tag 100 from the output signal of the reader communication unit 220.

The display information generating unit 260 displays the distance information of the tag 100 calculated by the control unit 240 and the ID of the tag 100 extracted by the control unit 240 on the display 270, thereby providing the user with the user. to provide.

The reader memory 250 is a recording medium that stores programs, data, and the like necessary for the operation of the reader 200.

Hereinafter, a process of providing the distance information of the tag 100 by the reader 200 will be described in detail with reference to FIG. 3. 3 is a flowchart provided to explain a method of providing distance information of a tag according to an embodiment of the present invention.

Referring to FIG. 3, first, the reader communication unit 220 receives an RF signal transmitted from the tag 100 (S310). In addition, the measurement unit 230 measures the magnitude of the RF signal received by the reader communication unit 220 (S320).

Then, the control unit 240 calculates the distance information of the tag 100 using the measurement result of the measuring unit 230 (S330). Here, 'distance information of the tag 100' means 'information on the distance between the tag 100 and the reader 200' as described above.

An inverse relationship is established between the distance between the tag 100 and the reader 200 and the magnitude of the RF signal measured by the measurement unit 230. That is, the shorter the distance between the tag 100 and the reader 200, the larger the magnitude of the RF signal measured by the measurement unit 230, and the longer the distance between the tag 100 and the reader 200. The size of the RF signal measured by the measuring unit 230 is small.

The controller 240 calculates distance information of the tag 100 using the measurement result received from the measurement unit 230 based on the theoretical background. More specifically, the controller 240 may calculate distance information corresponding to the measurement result by using the 'size-distance table' previously stored in the reader memory 250. Here, the size-distance table is a table showing a one-to-one correspondence relationship between the magnitude of the RF signal measured by the measuring unit 230 and the distance between the tag 100 and the reader 200.

The controller 240 extracts the ID of the tag 100 from the output signal output after the predetermined signal processing from the reader communication unit 220 (S340).

Then, the display information generator 260 displays 'distance information of the tag 100 calculated by the controller 240' and 'ID of the tag 100 extracted by the controller 240' on the display 270. The display process (S350).

As shown in FIG. 1, assuming that three tags 100-1, 100-2, and 100-3 are positioned around the reader 200, the execution result of step S350 is illustrated in FIG. 4A. Shown. As shown in FIG. 4A, the display 270 includes ID1, ID2, and ID3 of IDs 100-1, 100-2, and 100-3, and each tag 100-1, It can be seen that '40cm, 70cm, 20cm', which is the distance information 'of 100-2 and 100-3).

On the other hand, in the display processing of the distance information ('40cm, 70cm, 20cm') of the tags and the IDs ('ID1, ID2, ID3') of the tag in step S350, the display information generation unit 260 is a tag The symbolic display of the fields 100-1, 100-2, and 100-3 and the symbolic display of the leader 200 may be used for urban display processing. According to this, the visual effect of the information provided to a user can be heightened.

In FIG. 4B, the reader 200 is symbolically displayed by a method of displaying the letter 'leader' inside the block, and the tags 100-1, 100-2, 100- are displayed by the method of displaying the ID inside the block. 3) symbolically and the distance between the symbolic display of the reader 200 and the symbolic displays of the tags (100-1, 100-2, 100-3) in proportion to the calculated distance information By displaying by the above, the result which was displayed by the urban display was shown.

As shown in FIG. 4B, it can be seen that the symbolic display of the tag 3 (100-3) located closest to the leader 200 is displayed closest to the symbolic display of the reader 200, and the leader 200 and the most. It can be seen that the symbolic display of the far away tag 2 (100-2) is displayed farthest from the symbolic display of the reader 200.

Meanwhile, steps S310 and S320 are implemented to be performed over a number of times, and in step S330, an average of the magnitudes of the RF signals found by measuring the number of times is calculated and the distance information of the tag is calculated using the average. It is of course possible to implement examples.

Hereinafter, a process in which the reader 200 provides tag direction information as tag related information will be described in detail with reference to FIGS. 5 and 6. 5 is a block diagram of a tag providing a direction information of a tag and a tag according to another exemplary embodiment of the present invention.

Since the tag 100 shown in FIG. 5 and the tag 100 shown in FIG. 2 are the same, a detailed description thereof will be omitted.

The reader 200 includes a first / second reader antenna 210-1 / 210-2, a first / second reader communication unit 220-1 / 220-2, and a first / second measurement unit 230-1. 230, a controller 240, a reader memory 250, a display information generator 260, and a display 270.

The first reader communication unit 220-1 receives and demodulates the RF signal transmitted from the tag 100 through the first reader antenna 210-1, and converts the demodulated signal into a digital signal to be described later. To pass). The first measurement unit 230-1 measures the magnitude of the RF signal received by the first reader communication unit 220-1 and transmits the measurement result to the control unit 240.

The second reader communication unit 220-2 receives and demodulates the RF signal transmitted from the tag 100 through the second reader antenna 210-2, and converts the demodulated signal into a digital signal to be described later. To pass). The second measurement unit 230-2 measures the magnitude of the RF signal received by the second reader communication unit 220-2, and transmits the measurement result to the controller 240.

The control unit 240 calculates the direction information of the tag 100 using the measurement results received from the first measuring unit 230-1 and the second measuring unit 230-2. In addition, the controller 240 extracts the ID of the tag 100 from the output signal of the first reader communication unit 220-1 or the second reader communication unit 220-2.

The display information generating unit 260 displays the direction information of the tag 100 calculated by the control unit 240 and the ID of the tag 100 extracted by the control unit 240 on the display 270, thereby providing the user with the user. to provide.

The reader memory 250 is a recording medium that stores programs, data, and the like necessary for the operation of the reader 200.

Hereinafter, a process of providing the direction information of the tag 100 by the reader 200 will be described in detail with reference to FIG. 6. 6 is a flowchart provided to explain a method of providing direction information of a tag according to another embodiment of the present invention.

Referring to FIG. 6, first, the first reader communication unit 220-1 and the second reader communication unit 220-2 receive RF signals transmitted from the tag 100, respectively (S410). In addition, the first measurement unit 230-1 and the second measurement unit 230-2 respectively measure the magnitudes of the RF signals received by the first reader communication unit 220-1 and the second reader communication unit 220-2. Measure (S420).

Then, the control unit 240 calculates the direction information of the tag 100 using the measurement results received from the first measuring unit 230-1 and the second measuring unit 230-2 (S430). Specifically, the controller 240 may calculate the direction information corresponding to the measurement result by using the 'size-direction table' pre-stored in the reader memory 250. Here, the 'size-direction table' is the 'size of the RF signal measured by the first measuring unit 230-1 and the second measuring unit 230-2' and 'direction information of the tag 100', respectively. Table showing one-to-one correspondence.

In addition, the control unit 240 extracts the ID of the tag 100 from the output signal output after the predetermined signal processing from the first reader communication unit 220-1 or the second reader communication unit 220-2 (S440).

Then, the display information generator 260 displays 'direction information of the tag 100 calculated by the controller 240' and 'ID of the tag 100 extracted by the controller 240' on the display 270. The display process (S450).

As shown in FIG. 1, assuming that three tags 100-1, 100-2, and 100-3 are positioned around the reader 200, the result of performing step S450 is shown in FIG. 7A. Shown. As shown in FIG. 7A, the display 270 includes ID1, ID2, and ID3, which are IDs of the tags 100-1, 100-2, and 100-3, and each of the tags 100-1, It can be seen that '-40 °, 40 °, and 60 °', which are directions information of 100-2 and 100-3), are displayed together.

In operation S440, in the display processing of the direction information ('-40 °, 40 °, 60 °') of the tags and the IDs ('ID1, ID2, ID3') of the tags, the display information generator 260 The symbolic display of the tags 100-1, 100-2, and 100-3 and the symbolic display of the reader may be used to display the city.

In FIG. 7B, the direction between the symbolic display of the reader 200 and the symbolic displays of the tags 100-1, 100-2, and 100-3 is displayed by a method of adjusting proportionally according to the calculated direction information. The results shown are shown in the city.

Meanwhile, steps S410 and S420 are implemented to be performed over a number of times, and in step S430, an average of the magnitudes of the RF signals found by the measurement of the number of times is calculated and the direction information of the tag is calculated using the average. It is of course possible to implement examples.

Up to now, the reader 200 has described in detail a method of providing distance information of tags or direction information of tags as tag-related information. By integrating the two methods, it is also possible to easily infer the implementation of the present invention to provide the distance information of the tags and the direction information of the tags, the detailed description of the configuration and operation will be omitted, the display 270 I will only introduce the results with two pieces of information.

As shown in FIG. 1, assuming that three tags 100-1, 100-2, and 100-3 are positioned around the reader 200, the display result is illustrated in FIG. 8A. As shown in FIG. 8A, the display 270 includes ID1, ID2, and ID3, which are IDs of the tags 100-1, 100-2, and 100-3, and each of the tags 100-1, It can be seen that '40cm / -40 °, 70cm / 40 °, 20cm / 60 °' are displayed together with distance information and direction information of 100-2 and 100-3).

Meanwhile, the distance information and the direction information ('40cm / -40 °, 70cm / 40 °, 20cm / 60 °') of the tags are displayed together with the IDs ('ID1, ID2, ID3') of the tags. Therefore, the display information generation unit 260 may perform the display processing urbanly using the symbolic display of the tags 100-1, 100-2, and 100-3 and the symbolic display of the reader.

In FIG. 8B, the distance and direction between the symbolic display of the reader 200 and the symbolic displays of the tags 100-1, 100-2, and 100-3 are displayed according to the calculated distance information and the direction information. As a result, the results displayed in the city are shown.

Hereinafter, a process in which the reader 200 provides 'information about an article to which the tag 100 is attached' (hereinafter, abbreviated as 'information information of a tag') as tag related information is illustrated in FIGS. 9 and FIG. This will be described in detail with reference to 10. 9 is a block diagram illustrating a tag providing article information of a tag and a tag according to another exemplary embodiment of the present invention.

9, the tag 100 includes a tag memory 110, a tag communication unit 120, and a tag antenna 130. The tag memory 110 stores 'tag information' in addition to the 'tag ID'. The tag communication unit 120 generates an RF signal including a tag ID stored in the tag memory 110 and article information of the tag, and transmits the generated RF signal to the reader 200 through the tag antenna 130.

Meanwhile, the reader 200 includes a reader antenna 210, a reader communication unit 220, a controller 240, a display information generator 260, and a display 270.

The reader communication unit 220 receives and demodulates the RF signal transmitted from the tag 100 through the reader antenna 210, converts the demodulated signal into a digital signal, and transmits the demodulated signal to the controller 240 to be described later.

The controller 240 extracts the tag ID and the item information of the tag from the output signal of the reader communication unit 220.

The display information generation unit 260 displays the ID of the tag 100 and the article information of the tag extracted by the control unit 240 on the display 270 to provide the user.

Hereinafter, a process in which the reader 200 provides article information of a tag will be described in detail with reference to FIG. 10. 10 is a flowchart provided to explain a method of providing article information of a tag according to an embodiment of the present invention.

Referring to FIG. 10, first, the tag communication unit 120 transmits an RF signal including a tag ID stored in the tag memory 110 and article information of a tag to the reader 200 (S510).

Then, the reader communication unit 220 receives and demodulates the RF signals transmitted from the tag 100, and converts the demodulated signal into a digital signal (S520).

Thereafter, the control unit 240 extracts the tag ID and the article information of the tag from the output signal output after the predetermined signal processing from the reader communication unit 220 (S530).

Then, the display information generation unit 260 displays the tag ID extracted by the control unit 240 and the article information of the tag on the display 270 (S540).

As shown in FIG. 1, assuming that three tags 100-1, 100-2, and 100-3 are positioned around the reader 200, the result of performing step S540 is illustrated in FIG. 11A. Shown. As shown in FIG. 11A, the display 270 includes IDs ID1, ID2, and ID3 of IDs 100-1, 100-2, and 100-3, and each tag 100-1, respectively. 100-2, 100-3) 'apple, pear, persimmon' is displayed together.

Meanwhile, the article information of the tag may be a language of different countries. To this end, in addition to the tag ID and the article information of the tag, the tag memory 110 may further store `` language information about the article information of the tag '' (hereinafter, abbreviated as "language information").

'Language information' is information indicating the language of the item information of the tag. For example, if the item information of the tag is 'Korean', the language information is 'Korean', the language if the item information of the tag is 'English' The information is 'English'.

The storage structure of the tag memory 110 in which the tag ID, the language information, and the article information of the tag are stored is shown below. As shown below, the language information and the article information of the tag are stored in the user data area, which is an area where the user can freely store and change the information.

Tag ID User data Language Information (ex Korean, English) Item information of tag (ex apple, pear, persimmon)

In this case, the tag communication unit 120 generates an RF signal including a tag ID, language information, and article information of the tag stored in the tag memory 110, and generates the RF signal through the tag antenna 130 through the reader 200. To send).

Then, the control unit 240 provided in the reader 200 decodes the article information of the tag by using the language information, thereby obtaining the article information of the tag in a language that a user can recognize.

So far, the method of providing the article information of the tags as the tag related information by the reader 200 has been described in detail. However, it can be easily inferred to implement the present invention to provide the distance information and the direction information of the tags in addition to the article information of the tags, the detailed description of the configuration and operation will be omitted, the display 270 Only the displayed results of this information will be introduced.

As shown in FIG. 1, assuming that three tags 100-1, 100-2, and 100-3 are positioned around the reader 200, the display result is illustrated in FIG. 11B.

In FIG. 11B, the reader 200 is symbolically displayed by a method of displaying the letter 'leader' inside the block, and the tag is displayed by a method of displaying 'tag information (apple, pear, persimmon) of the tag' inside the block. Fields 100-1, 100-2 and 100-3 symbolically, and the distance between the symbolic markings of the leader 200 and the symbolic markings of the tags 100-1, 100-2 and 100-3. By displaying the direction by the method of adjusting the calculated distance information and the direction information, the results displayed in the city are shown.

So far, as the position information of the tag, the description has been given taking "distance information of the tag" and "direction information of the tag" as an example. However, it is of course possible to assume the positional information of tags different from these.

As position information of the tag that can be assumed, there may be mentioned 'location on earth of tag', 'address of tag' and 'logical location of tag'. The global location of the tag, the address of the tag, and the logical location of the tag may be stored in the tag memory 110 described above, transmitted to the reader 200, and provided to the user. At this time, the global position of the tag, the address of the tag and the logical position of the tag are preferably stored in the user data area provided in the tag memory 110.

Latitude and longitude (for example, "37 degrees 34 minutes north, 126 degrees 59 minutes east") in which the tag 100 is attached as an earth position of a tag are located.

In addition, as an address of the tag, an address (eg, "Samsung Department Store" or "Samsung Department Store Food Corner") in which an article on which the tag 100 is attached is located.

In addition, the logical position of the tag may be classified into 'absolute position of the tag' and 'logical position of the tag'. The absolute position of the tag is a position that does not take into account a relationship with the position of other articles in the vicinity (eg, "second from left of display stand 1st floor"). And, the relative position of the tag is a position in consideration of the relationship with the position of other articles in the vicinity. For example, if three items are placed on the shelf, the relative position of the item on the left is 'left', and the relative position of the item on the right is 'right' and the center of the item The relative position can be assumed to be 'central'.

As described above, according to the present invention, when a plurality of tags exist around the reader, the reader may provide location information of the tags, article information of the tags, and the like as related information of the tags. Accordingly, even when multiple tags are located around the reader, the user can distinguish the IDs read by the readers corresponding to the IDs of the respective tags.

In addition, although the preferred embodiment of the present invention has been shown and described above, the present invention is not limited to the specific embodiments described above, but the technical field to which the invention belongs without departing from the spirit of the invention 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 (22)

A communication unit for receiving a radio frequency (RF) signal from an RFID tag; A measuring unit measuring the magnitude of the RF signal received from the communication unit; A control unit for calculating position information of the RFID tag based on the magnitude of the RF signal measured by the measuring unit; And And a display information generation unit for displaying and processing the position information of the RFID tag calculated by the control unit on a display. The method of claim 1, The location information of the RFID tag, And one of distance information which is information on the distance between the RFID tag and the RFID reader and direction information which is information on the direction from the RFID reader to the RFID tag. The method of claim 1, The communication unit, A first communication unit for receiving the RF signal from the RFID tag; And A second communication unit for receiving the RF signal from the RFID tag; Including. The measuring unit, A first measuring unit measuring a magnitude of the RF signal received from the first communication unit; And And a second measuring unit measuring the magnitude of the RF signal received from the second communication unit. The control unit, Distance information which is information on the distance between the RFID tag and the RFID reader using the magnitude of the RF signal measured by the first measuring unit and the second measuring unit, and the RFID tag from the RFID reader. RFID-reader, characterized in that for calculating the direction information which is information on the direction of the. The method of claim 3, wherein The control unit, And at least one of the distance information and the direction information by using the average of the magnitudes of the RF signals measured over a number of times by the measurement unit. The method of claim 1, The location information of the RFID tag, The relationship between the position of the RFID tag on the earth, the address where the RFID-tagged article is located, the absolute position in the vicinity of the RFID-tag, and the position of the other article in the vicinity of the RFID-tag. RFID-reader comprising at least one of the relative positions considered. The method of claim 5, The location information of the RFID tag is stored in a memory provided in the RFID tag, And the position information of the RFID tag stored in the memory is included in the RF signal received from the communication unit. The method of claim 1, The display information generation unit, And the positional information of the RFID tag calculated by the controller is displayed on the display by using the symbolic display of the RFID tag and the symbolic display of the RFID reader. The method of claim 1, The control unit, Extracting article information which is information on the RFID-tagged article included in the RF signal received from the communication unit, The display information generation unit, And the article information extracted by the controller is displayed on the display together with the position information of the RFID tag. delete delete delete delete a) receiving a radio frequency (RF) signal from an RFID-tag; b) measuring the magnitude of the received RF signal; c) calculating position information of the RFID tag based on the measured magnitude of the RF signal; And d) displaying the calculated position information of the RFID tag; and providing the RFID-tag related information. The method of claim 13, The location information of the RFID tag, RFID-tag related information comprising one of distance information which is information on the distance between the RFID tag and the RFID reader and direction information which is information on the direction from the RFID reader to the RFID tag. How to Provide. delete The method of claim 14, The location information calculating step, And calculating at least one of the distance information and the direction information by using an average of the magnitudes of the RF signals measured over several times. The method of claim 13, The location information of the RFID tag, A relative position in consideration of the relationship between the position of the RFID tag on the earth, the address where the RFID tag is attached, the absolute position of the RFID tag, and the position with respect to other items in the vicinity of the RFID tag. RFID-tag related information providing method comprising at least one. The method of claim 17, The location information of the RFID tag is stored in a memory provided in the RFID tag, And the position information of the RFID tag stored in the memory is included in the RF signal received in step a). The method of claim 13, C), Using the symbolic display of the RFID tag and the symbolic display of the RFID-reader, providing the RFID-tag related information characterized in that the position information of the RFID-tag calculated in the step b) is urbanized. Way. The method of claim 13, Extracting article information which is information on the RFID-tagged article included in the received RF signal; And And displaying the extracted article information together with the position information of the RFID tag. delete delete

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