JP2005268837A - Radio tag, transmitter/receiver and management device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prolong the service life of a battery by preventing useless consumption of power. <P>SOLUTION: The radio tag performs radio reception of downstream data to be downloaded from a transmitter/receiver for only a predetermined time every time it performs radio wave reception of data to be uploaded to the transmitter/receiver one time (or predetermined time). In this way, since the radio tag does not perform reception operation in a time of performing a transmission operation and does not perform transmission operation in the time of performing the reception operation, the power is prevented from being uselessly consumed and the service life of the battery can be prolonged. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a wireless tag, a transmission / reception device, and a management device. More specifically, the wireless tag prevents wasteful consumption of power and extends battery life, and communicates with the wireless tag. The present invention relates to a transmission / reception device and a management device.

Conventionally, a transmission circuit that transmits uplink data to a transmission / reception device, a reception circuit that receives downlink data from the transmission / reception device, a processing circuit that performs processing corresponding to the received downlink data, and a specific radio wave There is known a radio tag including a tuning circuit and a switching circuit that supplies power from a battery to a transmission circuit, a reception circuit, and a processing circuit for a predetermined time when a specific radio wave is received by the tuning circuit (for example, Patent Documents). 1).
JP 2001-6061 A ([0023])

In the conventional wireless tag, if the upstream data including the identification information is transmitted from the wireless tag every predetermined time (for example, 1 minute) and the downstream data is received, the transmitting / receiving device is performed every predetermined time (for example, 1 minute). A specific radio wave may be emitted from. Then, since power is supplied from the battery of the wireless tag to the transmission circuit and the reception circuit for a predetermined time after the specific radio wave is emitted, the wireless tag can transmit upstream data and receive downstream data.
However, since power is supplied from the battery to the transmitting circuit and the receiving circuit all at once, power is consumed by the receiving circuit even when only the transmitting circuit needs to operate, and only the receiving circuit needs to operate. In addition, there is a problem that power is consumed in the transmission circuit, and power is wasted.
SUMMARY OF THE INVENTION An object of the present invention is to provide a wireless tag capable of preventing wasteful consumption of power and extending battery life, a transmission / reception device and a management device communicating with the wireless tag. is there.

In a first aspect, the present invention provides intermittent transmission means for intermittently repeating uplink data wireless transmission, and reception means for performing downlink data wireless reception for a predetermined time every time the wireless transmission is performed once or a predetermined number of times. Provided is a wireless tag comprising processing means for performing processing according to the content of the downlink data, and a battery for supplying power to each means.
In the wireless tag according to the first aspect, the wireless reception of the downlink data is performed for a predetermined time every time wireless data transmission of the upstream data is performed once or a predetermined number of times. The transmission circuit does not consume power during the time when only the receiving means needs to operate without consuming power, and the battery life can be extended without wasting power.

In a second aspect, the present invention provides a wireless tag characterized in that, in the wireless tag configured as described above, the receiving means extends a time for performing wireless reception according to the content of received downlink data.
The wireless tag according to the second aspect requires a reception time longer than the predetermined time even if the predetermined time is set to a shortest time until it is possible to determine whether or not it is necessary to extend the time for wireless reception. It becomes possible to cope with long downlink data.

In a third aspect, the present invention provides the wireless tag configured as described above, wherein the processing means stores n pieces of divided data when the received downlink data is divided data obtained by dividing the whole into n (≧ 2) pieces. Provided is a wireless tag characterized in that it is combined into one data after reception.
The wireless tag according to the third aspect can cope with long downlink data that cannot be received within the predetermined time even if the predetermined time is set short until the shortest time during which one piece of divided data can be received.

In a fourth aspect, the present invention provides a wireless tag characterized in that in the wireless tag configured as described above, the wireless tag includes reply means for wirelessly transmitting uplink data according to the content of downlink data received by the receiving means. provide.
In the wireless tag according to the fourth aspect, it is possible to confirm that downlink data has been received by the wireless tag on the transmission / reception device or management device side that communicates with the wireless tag.

In a fifth aspect, the present invention provides the wireless tag characterized in that, in the wireless tag configured as described above, the receiving means shortens the time for performing wireless reception according to the content of the received downlink data.
In the wireless tag according to the fifth aspect, even if the predetermined time is set longer, the reception can be stopped in a time shorter than the predetermined time, so that power is not wasted and battery life is extended. I can do it.

In a sixth aspect, the present invention provides a wireless tag characterized in that in the wireless tag configured as described above, a notification means for performing a notification operation according to the content of downlink data received by the reception means is provided.
In the wireless tag according to the sixth aspect, a signal can be sent from the transmitting / receiving device that communicates with the wireless tag or the management device to the operator who owns the wireless tag.

In a seventh aspect, the present invention provides a wireless tag characterized in that, in the wireless tag having the above-described configuration, the uplink data includes identification information of the wireless tag.
In the wireless tag according to the seventh aspect, it is possible to determine from which wireless tag the uplink data is transmitted / received and the management device side communicating with the wireless tag.

In an eighth aspect, the present invention provides a wireless tag characterized in that, in the wireless tag having the above-described configuration, the downlink data includes wireless tag identification information.
In the wireless tag according to the eighth aspect, it is possible to determine whether or not downlink data from a transmission / reception device or a management device that communicates with the wireless tag is addressed to the wireless tag.

In a ninth aspect, the present invention provides a wireless tag characterized in that, in the wireless tag having the above-described configuration, the frequency of the radio wave corresponding to the uplink data is different from the frequency of the radio wave corresponding to the downlink data.
In the wireless tag according to the ninth aspect, when a plurality of wireless tags exist close to each other, the uplink data wirelessly transmitted from another wireless tag is mistaken for the downlink data wirelessly transmitted from the transmission / reception device. Can be reliably prevented.

In a tenth aspect, the present invention is characterized by comprising receiving means for receiving uplink data wirelessly transmitted from a wireless tag, and transmitting means for wirelessly transmitting downlink data immediately after receiving the uplink data. Provided is a transmission / reception device.
The transmission / reception apparatus according to the tenth aspect can preferably communicate with the wireless tag having the above configuration.

In an eleventh aspect, the present invention relates to a receiving unit that receives radio data transmitted from a radio tag and includes identification information of the radio tag transmitted, and a radio that transmits the uplink data immediately after receiving the uplink data. There is provided a transmission / reception apparatus comprising transmission means for wirelessly transmitting downlink data including tag identification information.
In the transmission / reception apparatus according to the eleventh aspect, it is possible to preferably communicate with the wireless tag having the above configuration. Further, even when a plurality of wireless tags are present close to each other, it is possible to preferably communicate with each wireless tag.

In a twelfth aspect, the present invention provides a transmission / reception apparatus characterized in that, in the transmission / reception apparatus configured as described above, a frequency of a radio wave corresponding to the uplink data is different from a frequency of a radio wave corresponding to the downlink data.
In the transmission / reception device according to the twelfth aspect, when a plurality of wireless tags exist in close proximity, the wireless tag transmits uplink data wirelessly transmitted from another wireless tag to downlink transmission wirelessly transmitted from the transmission / reception device. It can be prevented from being mistaken for data.

In a thirteenth aspect, the present invention is a management device having an information processing device and a plurality of transmission / reception devices connected to the information processing device via a network, wherein the information processing device is connected to the information processing device via the network. The wireless tag identification information sent from the transmission / reception device and the storage means for storing the identification information of the transmission / reception device in association with each other, and the transmission / reception corresponding to the data to be sent to the wireless tag storing the identification information in the storage means Data transmitting means for sending to the apparatus via the network, wherein each transmitting / receiving apparatus wirelessly transmits from the wireless tag and receives upstream data including identification information of the wireless tag, and the received upstream data Included in the received upstream data and data sending means for sending the identification information of the wireless tag contained in the information processing apparatus to the information processing apparatus via the network. Wireless tag identification information and storage means for storing data sent from the information processing apparatus via the network in association with the wireless tag identification information; and wireless tag identification information included in the received upstream data Is a wireless tag identification information stored in the storage means, and a transmission means for wirelessly transmitting the corresponding stored data as downlink data is provided.
In the management device according to the thirteenth aspect, a large number of wireless tags can be managed by a plurality of transmission / reception devices that are shared by the communication areas of the transmission / reception devices under the control of the information processing device.

In a fourteenth aspect, the present invention relates to the management device configured as described above, wherein each of the transmission and reception devices reports to the information processing device via the network when receiving the uplink data corresponding to a reply to the downlink data. A management device is provided.
In the management device according to the fourteenth aspect, the information processing device can manage from which wireless tag the uplink data is received.

In a fifteenth aspect, the present invention provides the management device having the above-described configuration, wherein each of the transmission and reception devices wirelessly divides divided data obtained by dividing one data into n (≧ 2) pieces into n times as one downlink data. Provided is a management device characterized by transmitting.
In the management device according to the fifteenth aspect, even if a predetermined time is set to a shortest time until a wireless tag can receive one piece of divided data, long downlink data that cannot be received within the predetermined time can be transmitted to the wireless tag. Become.

In a sixteenth aspect, the present invention provides a management device characterized in that, in the management device configured as described above, a frequency of a radio wave corresponding to the uplink data is different from a frequency of a radio wave corresponding to the downlink data.
In the transmission / reception device according to the sixteenth aspect, when a plurality of wireless tags exist close to each other, the wireless tag transmits the uplink data wirelessly transmitted from another wireless tag to the downlink transmitted wirelessly from the transmission / reception device. It can be prevented from being mistaken for data.

  According to the wireless tag, the transmission / reception apparatus, and the management apparatus of the present invention, the reception means does not consume power when only the transmission means needs to operate, and the transmission circuit does not consume power when only the reception means needs to operate. The battery life can be extended without wasting power.

  Hereinafter, the present invention will be described in more detail with reference to the embodiments shown in the drawings. Note that the present invention is not limited thereby.

FIG. 1 is a block diagram of the wireless tags 1 to 6 and the management device 100 according to the first embodiment.
The management device 100 includes an information processing device 51 such as a computer and a plurality of transmission / reception devices 31 to 33 connected to the information processing device 51 via a network 52.

FIG. 2 is a block diagram showing the configuration of the wireless tag 1.
The wireless tag 1 includes a processing unit 1p such as a microprocessor, a transmission unit 1s that transmits uplink data by radio wave under the control of the processing unit 1p, a receiving unit 1r that receives radio data of downlink data under the control of the processing unit 1p, A notification unit 1d that visually or audibly notifies the holder of the wireless tag 1 under the control of the processing unit 1p, and a button battery 1b that supplies power to each unit are provided.
The frequency of the transmission radio wave is, for example, 1 GHz, and the frequency of the reception radio wave is, for example, 1 MHz.
The wireless tag 1 will be described as a representative, but the other wireless tags 2 to 6 have the same configuration as the wireless tag 1.

FIG. 3 is a block diagram illustrating a configuration of the transmission / reception device 31.
The transmission / reception device 31 includes a control unit 31c such as a microprocessor, a reception unit 31r that receives uplink data as radio waves under the control of the control unit 31c, a transmission unit 31s that transmits downlink data as radio waves under the control of the control unit 31c, The control unit 31 c includes a line unit 31 n for communicating with the information processing apparatus 51 via the network 52. Electric power to the transmission / reception device 31 is supplied from a commercial power source.
The frequency of the received radio wave is, for example, 1 GHz, and the frequency of the transmitted radio wave is, for example, 1 MHz.
Although the transmission / reception device 31 will be described as a representative, the other transmission / reception devices 32 and 33 have the same configuration as the transmission / reception device 31.

  FIG. 4 is a flowchart illustrating the operation of the wireless tag 1 according to the first embodiment. This operation is started by setting the button battery 1b to the wireless tag 1.

In step S1, the process waits until a predetermined transmission cycle T2 (see (a) in FIG. 7) or more has elapsed since the start of the previous uplink data transmission, and then proceeds to step S2 (promptly proceeds to step S2 at the time of activation).
In step S2, as shown to (a) of FIG. 7, the transmission part 1s is made into an operation state (on).
In step S3, as shown in FIG. 7 (b), ID data (data for identifying the wireless tag 1) is transmitted as radio data from the transmitter 1s as uplink data.
In step S4, as shown to (a) of FIG. 7, the transmission part 1s is made into a dormant state (off).
In step S5, as shown in (c) of FIG. 7, the receiving unit 1r is set in an operating state (ON).
In step S6, the time elapses with the reception timer.

In step S7, if the receiving unit 1r has not received downlink data addressed to itself, the process proceeds to step S8. If downlink data addressed to itself is received, the process proceeds to step S10. Whether or not it is downlink data addressed to itself is determined by whether or not its own identification information is included in the header portion at the head of the downlink data.
In step S8, if the reception timer has not reached the predetermined reception time T3 (see (c) in FIG. 7), the process returns to step S7, and if it has reached the reception time T3, the process proceeds to step S9.
In step S9, as shown in (c) of FIG. 7, the receiving unit 1r is put into a dormant state (off). Then, the process returns to step S1.

  Here, the operations in steps S1 to S9 represent basic operations in which uplink data is repeatedly transmitted in the transmission cycle T2 and downlink data can be received for the reception time T3 for each transmission. Note that the number of transmissions may be counted so that downlink data can be received for the reception time T3 every several transmissions.

In step S10, reception is continued until reception of downlink data addressed to itself is completed.
In step S11, the receiving unit 1r is put into a dormant state (off).

  Here, the operations of steps S10 and S11 shorten the reception time if the reception of the downlink data addressed to itself is completed in a time shorter than the predetermined reception time T3 (see FIG. 7C), and the predetermined reception time T3. This represents an operation of extending the reception time (see (c) of FIG. 8) when reception of the downlink data addressed to itself is completed in a longer time.

In step S12, as shown to (a) of FIG. 7 or FIG. 8, the transmission part 1s is made into an operation state (on).
In step S13, as shown in FIG. 7 or FIG. 8B, reply data (data for confirming that downlink data has been received) is transmitted as radio data from the transmitter 1s as uplink data.
In step S14, as shown to (a) of FIG. 7 or FIG. 8, the transmission part 1s is made into a dormant state (off).

In step S19, the content of the received downlink data is determined. If it is not a notification command, the process proceeds to step S20, and if it is a notification command, the process proceeds to step S21.
In step S20, processing other than notification is performed. Then, the process returns to step S1.

  In step S21, notification is performed by the notification unit 1d. For example, an LED is turned on, a buzzer is sounded, and a message is displayed on the LCD. Then, the process returns to step S1.

  FIG. 5 is a flowchart illustrating the operation of the transmission / reception device 31 according to the first embodiment. This operation is started by turning on the power of the transmission / reception device 31.

  In step R1, communication with the information processing apparatus 51 via the network 52 is established by the line unit 31n.

In step R2, when data to be transmitted to the wireless tag is sent from the information processing apparatus 51 via the network 52, the data is stored in association with the identification information of the wireless tag.
In step R3, it is determined whether the reception unit 31r has received uplink data. If received, the process proceeds to step R4. If not received, the process proceeds to step R8.

In step R4, it is checked whether the data to be sent to the wireless tag that has transmitted the received uplink data is stored. If stored, the process proceeds to step R5, and if not stored, the process proceeds to step R6.
In step R5, the stored data is wirelessly transmitted as downlink data from the transmission unit 31s. Delete transmitted data.

In step R6, identification information included in the received uplink data is sent to the information processing device 51.
In step R7, identification information and reception time included in the received uplink data are stored (if the identification information is already stored, the reception time is updated).

  In step R8, it is searched whether there is a reception time that is more than a predetermined time (for example, 5 minutes) before the present from the stored reception times. If so, the process proceeds to step R9;

In step R9, the identification information of the reception time before a certain time before the present is deleted.
In step R10, the deleted identification information is sent to the information processing apparatus 51.

In step R11, it is determined whether the receiving unit 31r has received reply data. If received, the process proceeds to step R12. If not received, the process returns to step R2.
In step R12, the response data is received and the identification information of the wireless tag of the transmission source is sent to the information processing apparatus 51. Then, the process returns to step R2.

  FIG. 6 is a flowchart illustrating the operation of the information processing apparatus 51 according to the first embodiment. This operation is started by turning on the information processing apparatus 51.

In Step P1, if the identification information of the wireless tags 1 to 6 is received from the transmission / reception devices 31 to 33 via the network 52, the process proceeds to Step P2, and if not received, the process proceeds to Step P3.
In step P2, the identification information of the wireless tags 1 to 6 and the identification information of the transmission / reception devices 31 to 33 that have sent them are stored in association with each other.

In step P3, if the identification information of the wireless tags 1 to 6 deleted from the transmission / reception devices 31 to 33 is received via the network 52, the process proceeds to step P4. If not received, the process proceeds to step P5.
In step P4, the identification information of the wireless tags 1 to 6 is deleted in correspondence with the identification information of the transmission / reception devices 31 to 33 that have sent the identification information of the deleted wireless tags 1 to 6.

  Here, by steps P1 to P4, the information processing apparatus 51 can manage the presence / absence and location (communication areas E1 to E3) of the worker who has the wireless tags 1 to 6.

  In Step P5, if there is data to be sent to any one of the wireless tags storing the identification information, the process proceeds to Step P6, and if there is not, the process proceeds to Step P7.

  In step P6, the data is sent to the transmitting / receiving device corresponding to the identification information of the wireless tag to which the data is to be sent.

  Here, by steps P5 and P6, the information processing apparatus 51 can issue data that causes the wireless tags 1 to 6 to perform a notification operation to call an operator, for example. Further, if the reply data is not returned from the wireless tags 1 to 6, it is possible to instruct the transmission / reception devices 31 to 33 to retransmit the downlink data.

In step P7, if the report having received the reply data is received from the transmission / reception devices 31 to 33 via the network 52, the process proceeds to step P8, and if not, the process proceeds to step P9.
In step P8, the data corresponding to the reply data is deleted.

In step P9, search is made for data that has been sent to the transmission / reception device but has not received a report of receiving reply data even if a certain time (for example, 5 minutes) has passed since the sending, and if there is no progress to step P10 If so, the process returns to Step P1.
In step P10, the corresponding data is retransmitted to the corresponding transmitting / receiving device. When the number of retransmissions reaches a certain number (for example, 10 times), some error processing is performed. Then, the process returns to Step P1.

According to the wireless tags 1 to 6 and the management device 100 of the first embodiment, every time wireless transmission of uplink data is performed once (or a predetermined number of times), downlink data is wirelessly received for a predetermined time, so that only the transmission unit 1s operates. The receiver 1r does not consume power during the time required, and the transmitter 1s does not consume power during the time when only the receiver 1r needs to operate. The battery 1b does not waste power. Can extend the lifespan.
When the downlink data is long, the reception time of the wireless tags 1 to 6 can be extended for reception.

  FIG. 10 is a flowchart illustrating the operation of the wireless tag 1 according to the second embodiment. This operation is started by setting the button battery 1b to the wireless tag 1.

In step S1, the process waits until a predetermined transmission cycle T2 (see (a) in FIG. 7) or more has elapsed since the start of the previous uplink data transmission, and then proceeds to step S2 (promptly proceeds to step S2 at the time of activation).
In step S2, as shown to (a) of FIG. 7, the transmission part 1s is made into an operation state (on).
In step S3, as shown in FIG. 7 (b), ID data (data for identifying the wireless tag 1) is transmitted as radio data from the transmitter 1s as uplink data.
In step S4, as shown to (a) of FIG. 7, the transmission part 1s is made into a dormant state (off).
In step S5, as shown in (c) of FIG. 7, the receiving unit 1r is set in an operating state (ON).
In step S6, the time elapses with the reception timer.

In step S7, if the receiving unit 1r has not received downlink data addressed to itself, the process proceeds to step S8. If downlink data addressed to itself is received, the process proceeds to step S10. Whether or not it is downlink data addressed to itself is determined by whether or not its own identification information is included in the header portion at the head of the downlink data.
In step S8, if the reception timer has not reached the predetermined reception time T3 (see (c) in FIG. 7), the process returns to step S7, and if it has reached the reception time T3, the process proceeds to step S9.
In step S9, as shown in (c) of FIG. 7, the receiving unit 1r is put into a dormant state (off). Then, the process returns to step S1.

  Here, the operations in steps S1 to S9 represent basic operations in which uplink data is repeatedly transmitted in the transmission cycle T2 and downlink data can be received for the reception time T3 for each transmission. Note that the number of transmissions may be counted so that downlink data can be received for the reception time T3 every several transmissions.

In step S10, reception is continued until reception of downlink data addressed to itself is completed.
In step S11, the receiving unit 1r is put into a dormant state (off).

  Here, the operations in steps S10 and S11 represent operations for shortening the reception time (see FIG. 7 or FIG. 11 (c)) if the reception of the downlink data addressed to itself is completed in a time shorter than the predetermined reception time T3. ing.

In step S12, as shown to (a) of FIG. 7 or FIG. 11, the transmission part 1s is made into an operation state (on).
In step S13, as shown in FIG. 7 or FIG. 11B, reply data (data for confirming that downlink data has been received) is transmitted as radio data from the transmitter 1s as uplink data.
In step S14, as shown to (a) of FIG. 7 or FIG. 11, the transmission part 1s is made into a dormant state (off).

In step S15, if the received downlink data is divided data, the process proceeds to step S16, and if not, the process proceeds to step S19. Whether or not the data is divided data is determined based on whether or not division information is included in the header portion at the head of the downlink data.
In step S16, if the received divided data is not the last divided data, the process proceeds to step S17, and if it is the last divided data, the process proceeds to step S18. Whether or not it is the end of the divided data is determined based on the division information included in the header portion at the head of the downlink data.
In step S17, the divided data is stored. Then, the process returns to step S1.

  In step S18, the divided data stored so far up to the last divided data that has been received are combined into one data.

In step S19, the content of the downlink data that is not divided data or the data obtained by combining a plurality of divided data is determined. If it is not a notification command, the process proceeds to step S20, and if it is a notification command, the process proceeds to step S21.
In step S20, processing other than notification is performed. Then, the process returns to step S1.

  In step S21, notification is performed by the notification unit 1d. For example, an LED is turned on, a buzzer is sounded, and a message is displayed on the LCD. Then, the process returns to step S1.

  FIG. 10 is a flowchart illustrating the operation of the transmission / reception device 31 according to the second embodiment. This operation is started by turning on the power of the transmission / reception device 31.

Except for step R2 ′, the process is the same as that of FIG.
In step R2 ′, data to be sent from the information processing apparatus 51 to the wireless tag is obtained and stored. At this time, in the case of long data in which the downlink data cannot be transmitted within the reception time T3 of the wireless tags 1 to 6, n (≧ 2) divisions that can be transmitted within the reception time T3 of the wireless tags 1 to 6 Divide and store data into data.
In step R5, the stored data is wirelessly transmitted as downlink data from the transmission unit 31s. However, if the data is divided and stored, one divided data is wirelessly transmitted as downlink data at a time.

  The operation of the information processing apparatus 51 is the same as that of the first embodiment.

According to the wireless tags 1 to 6 and the management device 100 of the second embodiment, the wireless reception of the downlink data is performed for a predetermined time every time wireless data transmission of the upstream data is performed once (or a predetermined number of times), so that only the transmission unit 1s operates. The receiver 1r does not consume power during the time required, and the transmitter 1s does not consume power during the time when only the receiver 1r needs to operate. The battery 1b does not waste power. Can extend the lifespan.
If the downlink data is long, the downlink data can be divided and transmitted.

  The wireless tag, the transmission / reception device, and the management device of the present invention can be used for managing the attendance of workers.

1 is a block diagram illustrating a wireless tag and a management device according to Embodiment 1. FIG. It is a block diagram which shows the structure of a wireless tag. It is a block diagram which shows the structure of a transmission / reception apparatus. FIG. 6 is a flowchart illustrating the operation of the wireless tag according to the first embodiment. FIG. 3 is a flowchart illustrating the operation of the transmission / reception apparatus according to the first embodiment. FIG. 3 is a flowchart illustrating the operation of the information processing apparatus according to the first embodiment. 6 is a time chart illustrating an operation of the wireless tag according to the first embodiment or the second embodiment. 3 is a time chart illustrating an operation of the wireless tag according to the first embodiment. FIG. 10 is a flowchart illustrating the operation of the wireless tag according to the second embodiment. FIG. 10 is a flowchart illustrating the operation of the transmission / reception device according to the second embodiment. 10 is a time chart illustrating an operation of the wireless tag according to the second embodiment.

Explanation of symbols

1-6 Radio tag 1p processing unit 1s transmission unit 1r reception unit 1d notification unit 31-33 transmission / reception device 31c control unit 31s transmission unit 31r reception unit 31n line unit 51 information processing device 52 network 100 management device E1, E2, E3 communication area

Claims (16)

  Intermittent transmission means for intermittently transmitting upstream data wirelessly, receiving means for performing wireless reception of downstream data for a predetermined time every time the wireless transmission is performed once or a predetermined number of times, and processing according to the content of the downstream data A wireless tag comprising processing means for performing and a battery for supplying power to each means.   2. The wireless tag according to claim 1, wherein the receiving unit extends a time for performing wireless reception in accordance with the content of the received downlink data.   3. The wireless tag according to claim 1, wherein when the received downlink data is divided data obtained by dividing the entire downlink data into n (≧ 2) pieces, the processing unit is configured to receive n pieces of divided data after receiving the divided data. A wireless tag characterized by combining two data.   4. The wireless tag according to claim 1, further comprising a reply unit configured to wirelessly transmit uplink data according to the content of downlink data received by the receiving unit. 5.   5. The wireless tag according to claim 1, wherein the receiving unit shortens a time for performing wireless reception in accordance with the content of the received downlink data.   6. The wireless tag according to claim 1, further comprising notification means for performing a notification operation according to the content of downlink data received by the reception means.   The wireless tag according to any one of claims 1 to 6, wherein the upstream data includes identification information of a wireless tag.   The wireless tag according to any one of claims 1 to 7, wherein the downlink data includes identification information of a wireless tag.   9. The wireless tag according to claim 1, wherein a frequency of a radio wave corresponding to the uplink data is different from a frequency of a radio wave corresponding to the downlink data.   A transmission / reception apparatus comprising: reception means for receiving uplink data wirelessly transmitted from a wireless tag; and transmission means for wirelessly transmitting downlink data immediately after receiving the uplink data.   A receiving unit that wirelessly transmits from the wireless tag and receives upstream data including identification information of the transmitted wireless tag, and wirelessly transmits downstream data including identification information of the wireless tag that transmitted the upstream data immediately after receiving the upstream data. A transmission / reception apparatus comprising a transmission means for transmitting.   12. The transmission / reception device according to claim 10 or 11, wherein a frequency of a radio wave corresponding to the uplink data is different from a frequency of a radio wave corresponding to the downlink data. A management device having an information processing device and a plurality of transmission / reception devices connected to the information processing device via a network,
The information processing device stores the identification information of the wireless tag transmitted from the transmission / reception device via the network in association with the identification information of the transmission / reception device, and stores the identification information in the storage unit. Data sending means for sending data to be sent to the wireless tag to the corresponding transmitting / receiving device via the network,
Each of the transmission / reception devices receives reception data that is wirelessly transmitted from a wireless tag and includes identification information of the wireless tag, and wireless network identification information included in the received upstream data to the information processing device. The data sending means for sending via the network, and the identification information of the wireless tag included in the received uplink data and the data sent from the information processing device via the network are stored in correspondence with the identification information of the wireless tag A storage unit, and a transmission unit that wirelessly transmits the data stored in correspondence as downlink data if the identification information of the wireless tag included in the received upstream data is one of the identification information of the wireless tag stored in the storage unit. The management apparatus characterized by comprising.   14. The management apparatus according to claim 13, wherein each transmitting / receiving apparatus reports to the information processing apparatus via the network when receiving uplink data corresponding to a reply to the downlink data.   15. The management device according to claim 13, wherein each transmitting / receiving device wirelessly transmits divided data obtained by dividing one piece of data into n (≧ 2) pieces as n pieces of downlink data. Management device characterized by.   16. The management apparatus according to claim 13, wherein a frequency of a radio wave corresponding to the uplink data is different from a frequency of a radio wave corresponding to the downlink data.

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