JP2006340048A - Tag system, ic tag, ic tag control method, program, and recording medium - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a tag system and an IC tag which reduces collision probability of signals by increase of density of IC tags, reduces consumption power of the IC tags, furthermore, can issue a quick warning if a security service is required. <P>SOLUTION: In a tag system, a tag reader 100 periodically issues a beacon signal including a command or ID (identification) to an IC tag 10, the IC tag 10 detects the command or the ID included in the received beacon signal from the tag reader 100, discriminates an operating condition by the command or the ID, and changes operation of the IC tag 10 itself (for example, a starting period). <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a tag system, an IC tag, an IC tag control method, a program, and a recording medium, and in particular, can reduce a signal collision probability due to an increase in the density of the IC tag and reduce power consumption of the IC tag. , Tag system, IC tag, IC tag control method, program, and recording medium.

  So far, services for managing articles (assets) by attaching IC tags such as RFID (Radio Frequency Identification) have been provided.

  In this article management service, an RFID IC tag is attached to each article, and a signal is periodically sent to the tag reader to estimate the location of the article from the presence of the article and the position information of the tag reader that received the signal. Was.

  However, since the signal transmission interval from the IC tag is constant so far, there is a problem that the probability of signal collision increases as the density of the IC tag increases, and the power consumption of the IC tag because it is necessary to periodically transmit the signal. There was a problem such as large. Furthermore, in the case of a security service that monitors the taking-out of articles from an area using the function of the IC tag, a prompt warning is issued if the IC tag is periodically activated at the same cycle in any area. There was a problem that could not.

There is a conventional technique using RFID (for example, see Patent Documents 1 and 2).
The RFID monitoring system described in Patent Document 1 can record initial information and individual usage information on an object to be attached, can be easily detected with strong resistance to unauthorized access, and the initial information is concealed. An object of the present invention is to provide an RFID tag that can be used. For this reason, initial information unique to the article is recorded in the non-rewritable ROM, and individual use information that is erased or updated with the transfer of management of the article is recorded in the rewritable ROM. In addition, after the individual usage information is recorded in the empty value of the rewritable ROM, reading of the initial information is stopped.

  However, the RFID monitoring system disclosed in Patent Document 1 is intended to increase resistance to unauthorized access to RFID, and the problem of an increase in signal collision probability due to an increase in the density of IC tags and an increase in power consumption of IC tags. It is not intended to solve this problem.

  Moreover, the position information search system described in Patent Document 2 is intended to search for position information of a moving body even when the mobile communication device is not operating. For this purpose, a short-range communication device (RFID or the like) that performs wireless communication with other mobile communication devices is mounted on the mobile device and used. In the position information search system, the identification ID related to the communication device to which the short-range wireless communication device (RFID or the like) is attached is transmitted from the short-range wireless communication device (RFID or the like) that received the interrogation radio wave to another communication device. The identification ID is transmitted to the position information database together with the position information generated in the position information generation unit of the other communication device. The user inputs the identification ID using the search terminal, and acquires position information related to the communication apparatus to which the short-range wireless communication apparatus (RFID) is attached from the position information database.

However, the position information retrieval system of Patent Document 2 is intended to retrieve the position information of a moving body even when the mobile communication device is not operating, and the probability of signal collision increases due to the increase in the density of IC tags. It is not intended to solve the above problem and the problem of increase in power consumption of the IC tag.
JP 2004-102370 A JP 2003-78474 A

  As described above, in an article management service system using a conventional IC tag, if the density of the IC tag increases, the probability of signal collision increases, and the IC tag needs to transmit signals periodically. When the security service for monitoring the taking-out of an article from an area using the IC tag function is performed, the IC tag has the same cycle in any area. When periodic activation is repeated, there is a problem that a prompt warning cannot be issued.

  The present invention has been made to solve such a problem, and its object is to reduce the probability of signal collision due to an increase in the density of the IC tag, to reduce the power consumption of the IC tag, and to provide a security service. It is an object of the present invention to provide a tag system, an IC tag, an IC tag control method, a program, and a recording medium that can issue a quick warning when necessary.

The present invention has been made to solve the above-described problems. In the tag system of the present invention, a tag reader of an IC tag periodically transmits a beacon signal, and the IC tag is periodically activated to start from the tag reader. In a tag system having a function of receiving a beacon signal and transmitting a response signal to the tag reader, the IC tag detects a command or ID included in the beacon signal received from the tag reader, and an operation condition is determined by the command or ID. It is characterized by comprising an operation changing means for changing the operation of the IC tag itself by determining the above.
As a result, for example, the activation period of the IC tag can be changed as necessary according to the surrounding conditions, the signal collision probability due to the increase in the density of the IC tag can be reduced, and the power consumption of the IC tag can be reduced.

In the tag system according to the present invention, the IC tag detects a command or ID included in a beacon signal received from the tag reader, and determines an operating condition based on the command or ID, whereby the activation period of the IC tag itself is determined. It is characterized by comprising a starting cycle changing means for changing.
As a result, the activation period of the IC tag can be changed as necessary according to the surrounding conditions, the signal collision probability due to the increase in the density of the IC tag can be reduced, and the power consumption of the IC tag can be reduced.

In the tag system of the present invention, the tag reader includes beacon signal transmitting means for transmitting a beacon signal including security level information, and the IC tag has a security level included in the beacon signal received from the tag reader. It is characterized by comprising an activation period changing means for detecting information and changing the activation period according to the security level.
Thereby, for example, in the area where the security level is low, the activation cycle can be lengthened, and in the area where the security level is high, the activation cycle can be shortened. A quick warning can be issued.

  In the tag system of the present invention, the IC tag detects security level storage means for storing data indicating a correspondence relationship between the ID and the security level, and information on the ID included in the beacon signal received from the tag reader. And an activation period changing means for reading out the security level associated with the ID and stored in the security level storage means and changing the activation period in accordance with the security level. Thereby, for example, in the area where the security level is low, the activation cycle can be lengthened, and in the area where the security level is high, the activation cycle can be shortened. A quick warning can be issued.

In the IC tag of the present invention, the tag reader of the IC tag periodically transmits a beacon signal, the IC tag is periodically activated to receive a beacon signal from the tag reader, and transmits a response signal to the tag reader. The IC tag in a tag system having a function, wherein the operation of the IC tag itself is changed by detecting a command or ID included in a beacon signal received from the tag reader and determining an operation condition based on the command or ID The operation changing means is provided.
As a result, for example, the activation period of the IC tag can be changed as necessary according to the surrounding conditions, the signal collision probability due to the increase in the density of the IC tag can be reduced, and the power consumption of the IC tag can be reduced.

In addition, the IC tag of the present invention detects the command or ID included in the beacon signal received from the tag reader, and determines the operating condition based on the command or ID, thereby enabling the IC tag's own activation cycle. It is characterized by comprising a starting cycle changing means for changing.
As a result, the activation period of the IC tag can be changed as necessary according to the surrounding conditions, the signal collision probability due to the increase in the density of the IC tag can be reduced, and the power consumption of the IC tag can be reduced.

In addition, the IC tag of the present invention is characterized in that it includes an activation period changing means for detecting information on a security level included in a beacon signal received from the tag reader and changing an activation period in accordance with the security level.
Thereby, for example, in the area where the security level is low, the activation cycle can be lengthened, and in the area where the security level is high, the activation cycle can be shortened. A quick warning can be issued.

Further, the IC tag of the present invention detects ID information included in the beacon signal received from the tag reader, reads the security level stored in the storage unit in association with the ID, and starts according to the security level An activation period changing means for changing the period is provided.
Thereby, for example, in the area where the security level is low, the activation cycle can be lengthened, and in the area where the security level is high, the activation cycle can be shortened. A quick warning can be issued.

Further, the IC tag of the present invention receives a beacon signal from the tag reader and transmits a response signal to the tag reader when it is determined by the beacon signal that it is within the reception range of the same tag reader. A response signal pause means for pause is provided.
As a result, the probability of signal collision due to an increase in the density of the IC tag can be reduced, and the power consumption of the IC tag can be reduced.

The IC tag according to the present invention includes a sensor for detecting a movement state, the movement state detecting means for detecting a movement or stop state of the IC tag itself based on a signal of the sensor, and the movement The apparatus includes a startup cycle changing unit that changes the startup cycle in accordance with the movement or stop state of the IC tag detected by the state detection unit.
As a result, the probability of signal collision due to an increase in the density of the IC tag can be reduced, and the power consumption of the IC tag can be reduced.

In addition, the IC tag of the present invention has a program for changing the operation of the IC tag itself in the storage unit, and determines the operation condition based on the command or ID included in the beacon signal received from the tag reader. And an operation changing means for executing the program and changing the operation.
As a result, the activation period of the IC tag can be changed as necessary according to the surrounding conditions, the signal collision probability due to the increase in the density of the IC tag can be reduced, and the power consumption of the IC tag can be reduced.

Further, the IC tag of the present invention, the IC tag receives a program to be executed by the IC tag transmitted from the tag reader by being included in the beacon signal, and receives program holding means for holding the program in a storage device; And a reception program executing means for changing the operation of the IC tag itself by executing the reception program held in the storage unit.
Thereby, the operation of the IC tag can be controlled from the tag reader, and the IC tag only needs to execute the received program, and the IC tag itself does not need to determine the operation condition.

In the IC tag control method of the present invention, the tag reader of the IC tag periodically transmits a beacon signal, the IC tag is periodically activated to receive a beacon signal from the tag reader, and sends a response signal to the tag reader. A method of controlling an IC tag in a tag system having a function of transmitting, wherein the IC tag detects a command or ID included in a beacon signal received from the tag reader and determines an operation condition based on the command or ID. Thus, the method includes the step of changing the operation of the IC tag itself.
As a result, for example, the activation period of the IC tag can be changed as necessary according to the surrounding conditions, the signal collision probability due to the increase in the density of the IC tag can be reduced, and the power consumption of the IC tag can be reduced.

In the IC tag control method of the present invention, the IC tag detects a command or ID included in a beacon signal received from the tag reader, and determines an operation condition based on the command or ID, whereby the IC tag itself The method includes a step of changing the activation cycle.
As a result, the activation period of the IC tag can be changed as necessary according to the surrounding conditions, the signal collision probability due to the increase in the density of the IC tag can be reduced, and the power consumption of the IC tag can be reduced.

  In the computer program of the present invention, the tag reader of the IC tag periodically transmits a beacon signal, the IC tag is periodically activated to receive a beacon signal from the tag reader, and transmits a response signal to the tag reader. By detecting a command or ID included in a beacon signal received from the tag reader in a computer in the IC tag in the tag system having a function, and determining an operation condition based on the command or ID, the activation cycle of the IC tag itself This is a program for executing the step of changing the.

  In the computer-readable recording medium of the present invention, the tag reader of the IC tag periodically transmits a beacon signal, the IC tag is periodically activated to receive the beacon signal from the tag reader, and responds to the tag reader. By detecting a command or ID included in a beacon signal received from the tag reader in a computer in the IC tag in a tag system having a function of transmitting a signal and determining an operation condition based on the command or ID, the IC tag It is a computer-readable recording medium recording a program for executing a step of changing its own start cycle.

  In the tag system of the present invention, the tag reader periodically transmits a beacon signal including a command or ID to the IC tag, and the IC tag detects the command or ID included in the beacon signal received from the tag reader, Since the operation condition is determined based on the command or ID and the operation of the IC tag itself is changed, for example, the activation cycle of the IC tag can be changed as necessary according to the surrounding situation, and the density of the IC tag can be changed. It is possible to reduce the probability of signal collision due to the increase in the power consumption of the IC tag.

  In the tag system of the present invention, the IC tag detects a command or ID included in the beacon signal received from the tag reader, determines an operating condition based on the command or ID, and changes the activation cycle of the IC tag itself. Since it did in this way, the starting period of an IC tag can be changed as needed by the surrounding situation, the collision probability of the signal by the increase in the density of an IC tag can be reduced, and the power consumption of an IC tag can be reduced.

  In the tag system of the present invention, the tag reader transmits the beacon signal including the security level information, and the IC tag detects the security level information included in the beacon signal received from the tag reader, and the security level is detected. As a result, the activation cycle is changed depending on the situation, so that, for example, the activation cycle can be lengthened in an area with a low security level, and the activation cycle can be shortened in an area with a high security level. A quick warning can be issued when an article is illegally taken out.

  In the IC tag of the present invention, the IC tag detects a command or ID included in the beacon signal received from the tag reader, determines an operation condition based on the command or ID, and changes the operation of the IC tag itself. Thus, for example, the activation period of the IC tag can be changed as necessary according to the surrounding conditions, the probability of signal collision due to an increase in the density of the IC tag can be reduced, and the power consumption of the IC tag can be reduced.

  In the IC tag of the present invention, the IC tag detects a command or ID included in the beacon signal received from the tag reader, determines an operating condition based on the command or ID, and changes the activation cycle of the IC tag itself. Since it did in this way, the starting period of an IC tag can be changed as needed by the surrounding situation, the collision probability of the signal by the increase in the density of an IC tag can be reduced, and the power consumption of an IC tag can be reduced.

  In the IC tag of the present invention, the IC tag detects the security level information included in the beacon signal received from the tag reader, and changes the activation cycle according to the security level. For example, the start cycle can be lengthened in areas with a low security level, and the start cycle can be shortened in an area with a high security level, so that a quick warning can be given when an article with an IC tag is illegally taken out. Can be issued.

  In the IC tag of the present invention, when the IC tag receives a beacon signal from the tag reader and determines that the beacon signal is within the reception range (area) of the same tag reader by the beacon signal, Since transmission is paused, the probability of signal collision due to an increase in the density of the IC tag can be reduced, and the power consumption of the IC tag can be reduced.

  In the IC tag of the present invention, the IC tag is provided with a sensor for detecting the movement state, the IC tag itself detects the movement or stop state, and is activated in response to the movement or stop state of the IC tag. Since the period is changed, it is possible to reduce the signal collision probability due to the increase in the density of the IC tag and to reduce the power consumption of the IC tag.

  In the IC tag of the present invention, the IC tag stores a program for changing the operation of the IC tag itself in the storage unit, and determines the operation condition based on the command or ID included in the beacon signal received from the tag reader. As a result, the activation period of the IC tag can be changed as necessary according to the surrounding conditions, the signal collision probability due to the increase in the density of the IC tag is reduced, and the power consumption of the IC tag Can be reduced.

  In the IC tag of the present invention, the IC tag receives a program to be executed by the IC tag transmitted from the tag reader in the beacon signal, holds the program in a storage device, and executes the reception program As a result, the operation of the IC tag itself is changed, so that the operation of the IC tag can be controlled from the tag reader, and the IC tag only needs to execute the received program. There is no need to determine the conditions.

  In the IC tag control method of the present invention, the tag reader periodically transmits a beacon signal including a command or an ID to the IC tag, and the IC tag transmits a command or a beacon signal received from the tag reader. Since the ID is detected, the operation condition is determined based on the command or ID, and the operation of the IC tag itself is changed, for example, the activation cycle of the IC tag can be changed as necessary according to the surrounding situation, The probability of signal collision due to an increase in the density of the IC tag can be reduced, and the power consumption of the IC tag can be reduced.

  In the IC tag control method of the present invention, the IC tag detects a command or ID included in the beacon signal received from the tag reader, determines an operating condition based on the command or ID, and activates the IC tag itself. As a result, it is possible to change the start cycle of the IC tag as necessary according to the surrounding conditions, reduce the signal collision probability due to the increase in the density of the IC tag, and reduce the power consumption of the IC tag it can.

  Next, the best mode for carrying out the present invention will be described with reference to the drawings.

  FIG. 1 is a diagram for explaining the outline of the tag system of the present invention. As shown in FIG. 1, in the tag system of the present invention, a plurality of tag readers 100 are installed in a factory, a warehouse, or the like, and an area 1 in which the tag reader 100 communicates with the IC tag 10 is centered on each tag reader 100. Is set. The IC tag 10 is a non-contact IC tag 10 such as an RFID, and communicates with the tag reader 100 by radio waves. The IC tag 10 is used by being attached to an article such as a product.

  The tag reader 100 broadcasts a beacon signal periodically. Further, the IC tag 10 is normally in a sleeping state (resting state), and has a function of periodically starting up, receiving a beacon signal, and transmitting a response signal to the tag reader 100.

  In this case, the IC tag 10 detects the signal strength of the beacon signal received from the tag reader 100, the command, ID, security level information, etc. included in the beacon signal, estimates the presence position of the IC tag 10 itself, and based on this To change the next startup interval. In addition to the above, the method for detecting the security level information includes, for example, a table in which the IC tag 10 indicates the correlation between the ID and the security level in the storage unit, and detects the ID included in the beacon signal, The security level associated with the ID and recorded in the table may be detected.

  For example, in the case of a security service, a security level is set for each area 1 and the activation period of the IC tag 10 is changed according to the estimated security level of the existing location. That is, if the IC tag 10 is in a place with a low security level, its activation cycle is long, and if it is in a place with a high security level, its activation cycle is short, so that the tag system can issue a quick warning. It becomes like this.

  For example, FIG. 2 is a diagram showing an example of the movement trajectory of the IC tag. As shown in FIG. 2, the area 1 centering on the tag reader 100 has three security levels A (low) and security level B (medium). , Security level C (high) is classified, and it is assumed that the security level is set higher in the area closer to the entrance 2. In this state, for example, it is assumed that the IC tag 10 moves to the entrance / exit 2 via points A, B, and C.

  FIG. 3 is a diagram illustrating an example of a change in the activation cycle of the IC tag. As shown in FIG. 3, when the IC tag 10 is present at the point A, the security level is the lowest, and the activation is repeated at the time interval of the activation cycle A. When you come to point B. The activation cycle is set short (activation cycle B). When it comes to point C, the security level is the highest and it is continuously activated.

  The IC tag 10 is for grasping its own position (point). The ID (ID of the tag reader 100) or the security level information included in the signal from the tag reader 100 is used. Note that the tag reader 100 broadcasts a beacon signal almost continuously so that the IC tag 10 that starts intermittently can receive a signal from the tag reader 100.

  In order to prevent collision of signals from the tag reader 100, each tag reader 100 synchronizes time using a communication network such as a wired network, and transmits a beacon signal by time division multiplexing on the same channel. The IC tag 10 transmits a response signal to the transmission source tag reader 100 of the received signal, so that the tag reader 100 knows the position of the IC tag 10 and an article with the IC tag 10 attached is illegally taken out. Can be monitored (warning).

  When a beacon signal is received from the tag reader 100 when the IC tag 10 is activated, if the tag reader 100 is the same as the source tag reader 100 that was activated last time and received the beacon signal, the IC tag 10 is the tag reader. By canceling transmission to 100, it is possible to reduce signal collision and power consumption in the IC tag 10.

  Further, when monitoring the behavior pattern of the same IC tag 10, the IC tag 10 includes a sensor such as an accelerometer (see FIG. 7), and the IC tag 10 can know its own status (stop / moving state). This can also be dealt with by changing the activation cycle according to the status.

  FIG. 4 is a diagram showing an example of the movement state and activation cycle of the IC tag. As shown in FIG. 4, the activation cycle X is long when the IC tag 10 is stopped, and the activation cycle Y is short when moving. .

  FIG. 5 is a diagram illustrating a calculation example of power consumption when the activation period of the IC tag is changed. FIG. 5A shows the relationship between the travel time ratio (horizontal axis) and the battery life (horizontal axis: year unit). Here, the IC tag 10 can know its own status (stop / move), and the activation interval at the time of movement is shortened to one-sixth of that at the time of stop, and as long as it exists in the same tag reader 100, the IC tag 10 shows the relationship between the ratio of travel time to the total time (travel time + stop time) and battery life when no signal is transmitted from 10.

  The battery life calculation formula is shown in FIG. 5B, and the parameters used in the battery life calculation formula are shown in FIG. 5C.

  As described above, the IC tag 10 changes the activation cycle in accordance with its own status, so that the battery life can be significantly extended when the frequency of movement is low.

Next, a configuration example of the tag system of the present invention will be described.
FIG. 6 is a block diagram showing a first configuration example of the tag system of the present invention, and shows only the portion directly related to the present invention.

  The IC tag 10 shown in FIG. 6 is an example of an IC tag using RFID (Radio Frequency Identification) technology. The IC tag 10 includes an antenna 11 and an IC chip unit 12 including an IC chip and peripheral circuits. It is embedded and communicates with the tag reader 100 using electromagnetic waves as a medium.

  Further, in the IC chip unit 12, a power supply unit 13, a transmission / reception unit 14, a control unit 15 including a CPU, and a storage unit 16 including a ROM and a RAM are provided. The power supply unit 13 may be a battery or may rectify electromagnetic waves received by the antenna 11 and supply necessary power to the IC chip unit 12. The transmission / reception unit 14 is a processing unit that transmits / receives data to / from the tag reader 100 using electromagnetic waves. The control unit 15 controls the overall operation of the IC chip unit 12. The storage unit 16 stores processing programs and data necessary for realizing the functions of the IC tag 10.

  The processing function unit 20 is a block diagram showing processing functions executed by the IC tag 10. This process is realized by the control unit 15 reading and executing the processing program stored in the storage unit 16.

The beacon signal detection processing unit 21 in the processing function unit 20 performs processing to detect a command, ID (tag reader ID), security level information, and the like included in the beacon signal received by the transmission / reception unit 14.
The response signal transmission processing unit 22 performs a process of receiving a beacon signal from the tag reader 100 and transmitting a response signal to the tag reader 100.
The operation change processing unit (operation change unit) 23 detects information (for example, command, ID, and security level information) included in the beacon signal detected by the beacon signal detection processing unit 21, and the IC tag 10 A processing program to be executed is selected, and processing for changing the operation of the IC tag 10 itself is performed. The operation change processing unit 23 includes an activation cycle change processing unit 24.
The activation cycle change processing unit (activation cycle changing means) 24 performs processing for changing the activation cycle of the IC tag 10 itself.

  Further, when receiving a beacon signal from the tag reader 100, the response signal pause processing unit (response signal pause means) 25 determines that the beacon signal continues to exist within the reception range (area) of the same tag reader 100. In such a case, processing for stopping transmission of the response signal to the tag reader 100 is performed.

  The tag reader 100 transmits a beacon signal and also controls the overall transmission / reception unit 101 for receiving a response signal from the IC tag 10, the communication interface 102 for connecting the tag reader 100 to the communication network 3, and the entire tag reader. It comprises a control unit 103, a storage unit 104 for storing data necessary for tag reader processing, and a processing program unit 110 for executing processing necessary for the tag reader. Each tag reader 100 is connected to the upper server 4 via the communication network 3.

In order to prevent beacon signals from colliding, the signal synchronization processing unit 111 in the processing program unit 110 synchronizes the time using the communication network 3 such as a wired network, and transmits the beacon signal by time division multiplexing on the same channel. It is a processing part.
The beacon signal transmission processing unit 112 generates a beacon signal including the tag reader ID of the local station and transmits the beacon signal via the transmission / reception unit 101.
The IC tag signal reception processing unit 113 detects the response signal received from the IC tag 10, detects the ID of the IC tag 10, etc., and recognizes and registers the IC tag 10 existing in the area of the own station. Do.

  The storage unit 104 stores the ID of the tag reader itself, information on the security level, information on IC tags existing in the area, and the like.

  FIG. 7 is a block diagram showing a second configuration example of the tag system of the present invention, which is a configuration example in which an acceleration sensor 17 is added to the IC tag 10 shown in the first configuration example shown in FIG. . As a result, a movement state detection processing unit (movement state detection means) 26 is added to the processing function unit 20, and the movement state detection processing unit 26 determines the status (stop / movement state) of the IC tag 10 from the signal of the acceleration sensor 17. A process of instructing the activation cycle change processing unit 24 to detect and change the activation cycle according to the state of movement / stop is performed.

  FIG. 8 is a block diagram showing a third configuration example of the tag system of the present invention. When a beacon signal is transmitted from the tag reader 100 to the IC tag 10, the tag reader 100 is stored in the storage unit 104. In this example, the IC tag program 104a is read, and the IC tag program 104a is included in the beacon signal and transmitted to the IC tag 10.

  In the IC tag 10, the reception program holding processing unit (reception program holding means) 27 in the processing function unit 20 holds the IC tag program detected by the beacon signal detection processing unit 21 in the storage unit 16 and also receives the reception program. The execution processing unit (reception program execution means) 28 executes the IC tag program, and as a result, the operation of the IC tag 10 is changed. The other reference numerals in FIG. 8 are the same as those in FIG.

  Although the embodiment of the present invention has been described above, the tag system, IC tag, and tag reader of the present invention are not limited to the above illustrated examples, and various modifications can be made without departing from the gist of the present invention. Of course, can be added.

  Since the present invention reduces the signal collision probability due to the increase in the density of the IC tag, reduces the power consumption of the IC tag, and has the effect that a prompt warning can be issued when a security service is required. The present invention is useful for a tag system, an IC tag, an IC tag control method, a program, a recording medium, and the like.

It is a figure for demonstrating the outline | summary of the tag system of this invention. It is a figure which shows the example of the movement locus | trajectory of an IC tag. It is a figure which shows the example of a change of the starting period of an IC tag. It is a figure which shows the example of the movement state of an IC tag, and a starting period. It is a figure which shows the example of calculation of the power consumption when the starting period of an IC tag is changed. It is a block diagram which shows the 1st structural example of the tag system of this invention. It is a block diagram which shows the 2nd structural example of the tag system of this invention. It is a block diagram which shows the 3rd structural example of the tag system of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Tag reader area 2 Entrance / exit 3 Communication network 4 Server 10 IC tag 11 Antenna 12 IC chip part 13 Power supply part 14 Transmission / reception part 15 Control part 16 Storage part 20 Processing function part 21 Beacon signal detection processing part 22 Response signal transmission process part 23 Operation | movement Change processing unit 24 Start cycle change processing unit 25 Response signal pause processing unit 26 Moving state detection processing unit 27 Received program holding processing unit 28 Received program execution processing unit 100 Tag reader 101 Transmission / reception unit 102 Communication interface 103 Control unit 104 Storage unit 104a IC Tag program 110 Processing program unit 111 Signal synchronization processing unit 112 Beacon signal transmission processing unit 113 IC tag signal reception processing unit

Claims (16)

In a tag system having a function that a tag reader of an IC tag periodically transmits a beacon signal, the IC tag is periodically activated to receive a beacon signal from the tag reader, and a response signal is transmitted to the tag reader.
The IC tag includes an operation changing unit that detects a command or ID included in a beacon signal received from the tag reader and determines an operation condition based on the command or ID to change an operation of the IC tag itself. Characteristic tag system. The IC tag includes a start period changing unit that detects a command or ID included in a beacon signal received from the tag reader and determines an operation condition based on the command or ID, thereby changing a start period of the IC tag itself. The tag system according to claim 1. The tag reader comprises a beacon signal transmission means for transmitting a beacon signal including security level information,
2. The IC tag according to claim 1, further comprising activation period changing means for detecting information on a security level included in a beacon signal received from the tag reader and changing an activation period in accordance with the security level. Item 3. The tag system according to Item 2. The IC tag is
Security level storage means for storing data indicating a correspondence relationship between the ID and the security level;
Information on the ID included in the beacon signal received from the tag reader is detected, the security level stored in the security level storage means in association with the ID is read, and an activation cycle is set according to the security level. A starting cycle changing means to be changed;
The tag system according to claim 1, further comprising: The tag reader of an IC tag periodically transmits a beacon signal, the IC tag is periodically activated to receive a beacon signal from the tag reader, and the IC tag in a tag system having a function of transmitting a response signal to the tag reader Because
An IC tag comprising: an operation changing unit that detects a command or ID included in a beacon signal received from the tag reader and determines an operation condition based on the command or ID to change an operation of the IC tag itself. . The IC tag includes a start period changing unit that detects a command or ID included in a beacon signal received from the tag reader and determines an operation condition based on the command or ID, thereby changing a start period of the IC tag itself. The IC tag according to claim 5. The said IC tag is provided with the starting period change means which detects the information of the security level contained in the beacon signal received from the said tag reader, and changes a starting period according to this security level. Item 7. The IC tag according to Item 6. The IC tag detects ID information included in the beacon signal received from the tag reader, reads the security level stored in the storage unit in association with the ID, and changes the activation cycle according to the security level. The IC tag according to claim 5, further comprising a start cycle changing unit. The IC tag includes a response signal pause unit that receives a beacon signal from the tag reader and pauses transmission of a response signal to the tag reader when the beacon signal is determined to be within the reception range of the same tag reader. The IC tag according to any one of claims 5 to 8, wherein: The IC tag includes a sensor for detecting a movement state, and a movement state detection unit that detects a movement or stop state of the IC tag itself based on a signal of the sensor;
10. The apparatus according to claim 5, further comprising: an activation cycle changing unit that changes an activation cycle in response to the movement or stop state of the IC tag detected by the movement state detection unit. IC tag. The IC tag stores a program for changing the operation of the IC tag itself in the storage unit, determines an operation condition based on a command or ID included in the beacon signal received from the tag reader, executes the program, and operates. The IC tag according to any one of claims 5 to 10, further comprising: an operation changing unit that changes. The IC tag receives a program to be executed by an IC tag transmitted from a tag reader by being included in a beacon signal, and receives program holding means for holding the program in a storage device;
The IC tag according to any one of claims 5 to 10, further comprising: a reception program executing unit that changes an operation of the IC tag itself by executing the reception program held in the storage unit. The tag reader of the IC tag periodically transmits a beacon signal, and the IC tag is periodically activated to receive a beacon signal from the tag reader and transmit a response signal to the tag reader. A control method,
The IC tag includes a step of detecting a command or ID included in a beacon signal received from the tag reader and changing an operation of the IC tag itself by determining an operation condition based on the command or ID. IC tag control method. The IC tag includes a step of detecting a command or ID included in a beacon signal received from the tag reader and changing an activation period of the IC tag itself by determining an operation condition based on the command or ID. The IC tag control method according to claim 13. The tag reader of an IC tag periodically transmits a beacon signal, the IC tag is periodically activated to receive a beacon signal from the tag reader, and the IC tag in a tag system having a function of transmitting a response signal to the tag reader On the computer in
A program for detecting a command or ID included in a beacon signal received from the tag reader and determining an operating condition based on the command or ID, thereby executing a step of changing the activation cycle of the IC tag itself. The tag reader of an IC tag periodically transmits a beacon signal, the IC tag is periodically activated to receive a beacon signal from the tag reader, and the IC tag in a tag system having a function of transmitting a response signal to the tag reader On the computer in
A computer recording a program for detecting a command or ID contained in a beacon signal received from the tag reader and determining an operating condition based on the command or ID, thereby executing a step of changing the activation cycle of the IC tag itself A readable recording medium.

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