TWI645338B - An operation method of radio frequency identification reader - Google Patents

Abstract

A method for operating a reader for radio frequency identification, the reader comprising a processor, a storage module and a Bluetooth module, and the Bluetooth module is configured to continuously receive multiple data transmitted by other readers A packet, each data packet including a priority value and a corresponding reader state. Therefore, the reader can determine whether the tag can be read according to the received multiple data packets to avoid the occurrence of a reader collision.

Description

Method of operation for a radio frequency identification reader

The present invention relates to a method of operating a radio frequency identification reader, and more particularly to an operation method for avoiding collision of a radio frequency identification reader.

Radio Frequency Identification (RFID) is a wireless communication technology that uses radio waves to transmit information and is widely used in different industries. Although radio frequency identification brings a lot of conveniences, there are also many restrictions in its use. For example, in a storage environment or an airport management environment, multiple readers are arranged in one space, and it is easy to occur more than two times. The readers cause overlapping reading ranges within the read range of each other, which is referred to as a dense reader environment. In the dense reader environment, it is easy to cause the same tag to be read by multiple readers at the same time, that is, RFID reader collision. Reader collisions can cause some readers to fail to read the target tag, so how to effectively solve the RFID reader collision is a very important issue.

In order to solve the above drawbacks, the present invention provides a method for operating a reader for radio frequency identification, the reader comprising a processor, a storage module, and a Bluetooth module. The processor is electrically connected to the storage module and the Bluetooth module, and the Bluetooth module is configured to continuously receive a plurality of data packets transmitted by other readers, each data packet including a priority value and a corresponding reader status. The data packet is stored and stored in the storage module, and the step includes: the processor determining, according to the received data packet, whether the priority value is greater than the priority value of the reader and the state is other readers in the reading; If not, make the status of the reader read, the Bluetooth module and broadcast the status of the reader; the reader reads the RFID tag; the status of the reader is the end of the reading, the Bluetooth module Group and broadcast the status of the reader.

The method of operation of the RFID reader of the present invention not only gives the reader different priorities, but also allows each reader to instantly receive the status and priority values of other readers within the read range. By this means, each reader can effectively determine whether there are other readers located in the reading range that are currently reading the label, so that multiple readers can be read simultaneously in the reading range. In addition, the existing reader can effectively reduce the collision of the reader by the operation method of the invention without additional external control system, and can effectively reduce the cost of the implementation and increase the value of the commercial application.

The above and other objects, features and advantages of the present invention will become more apparent and understood.

100, 100a, 100b, 100c‧‧ ‧ reader

10‧‧‧ processor

20‧‧‧Read module

30‧‧‧Blue Bud Module

40‧‧‧ storage module

Steps 201-210, 206a, 208a‧‧

1A is a schematic diagram of an architectural embodiment of a reader.

FIG. 1B is a schematic diagram of a reader configuration embodiment.

2 is a schematic diagram of an embodiment of an operation method of the present invention.

3 is a schematic diagram of another architectural embodiment of a reader of the present invention.

4 is a schematic diagram of another embodiment of an operation method for operating according to an embodiment of the architecture of the reader of FIG. 3 according to the present invention.

Please refer to FIG. 1A . FIG. 1A is a schematic diagram of an architecture embodiment of a reader 100. The reader 100 includes a processor 10, a reading module 20, a Bluetooth module 30, and a storage module 40. The processor 10 reads and reads The module 20, the Bluetooth module 30 and the storage module 40 are electrically connected. The reading module 20 is configured to read the tag information of the radio frequency identification tag, and the Bluetooth module 30 is configured to continuously receive the data packet broadcast by the other reader 100, and the information contained in the data packet is used by The processor 10 is stored in the storage module 40. The Bluetooth module 30 is also used to broadcast the data packet of the reader 100 itself. The data packet includes related information and priority of the reader 100, for example, blue. The bud identification information, the execution status tag, the read status tag, and the priority value, and each reader 100 has different Bluetooth identification information and an initial priority value. The processor 100 is configured to process or transfer the received information, and is configured to set an execution status tag, a read status tag, and a priority value corresponding to the state of the reader 100, and the processor 100 generates the data packet corresponding to the received data packet. The time stamp generates a information table according to the received data packet and its time stamp, and stores the information table to the storage module 40. The time stamp represents the time when the reader 100 receives the data packet, and the unit is, for example, micro. Seconds, but not limited to this. The storage module 40 is configured to store a plurality of data tables corresponding to different readers 100. The storage module 40 simultaneously records the execution status label, the read status label, and the priority value of the reader 100.

Please refer to FIG. 1B. FIG. 1B is a schematic diagram of a configuration of the reader 100. The reader 100a, the reader 100b, and the reader 100c are exemplified in FIG. 1B, but not limited thereto. . In FIG. 1B, a broken line indicates the reading range of each reader 100, and it can be seen in this embodiment that the reading ranges of the reader 100a, the reader 100b, and the reader 100c partially overlap each other. In the conventional technique, this case will easily occur as described above.

Please refer to FIG. 2. FIG. 2 is a schematic diagram of an embodiment of the operation method of the present invention. The reader 100a of FIG. 1B is taken as an example for description. At step 201, the processor 10 sets the execution status tag of the reader 100a to an initial state, which represents that the reader 100a is ready to enter the read program.

In step 202, the processor 10 determines, based on the received data packet, whether there is a priority value greater than the priority value of the reader 100a and whose state is the other reader 100 in the reading. Further, in this step, the processor 10 reads a plurality of information forms stored in the storage module 40 and determines whether the information stored in the information tables is valid. For example, the processor 10 can use each information. The timestamp stored in the table determines whether the information table is valid. If the time difference between the timestamp and the current time exceeds a threshold, it represents the other reader 100 corresponding to the information table (such as the reader 100b of FIG. 1B or The reader 100c has stopped updating its state, and the processor 10 determines that the information table is invalid. The threshold is, for example, 10 seconds, but is not limited thereto. The processor 10 then reads the priority values stored in the valid data table and the execution status tag, thereby determining the status of the other readers 100 in the vicinity. If the determination in step 202 is YES, the representative processor 10 determines, based on the plurality of valid data tables, that there is currently a reader 100 whose priority value is higher than the reader 100a and whose execution status tag is in reading, so the steps are continued. 202 to detect the status of the other readers 100, and vice versa, proceed to step 203.

At step 203, the processor 10 sets the read status tag of the reader 100a to be readable. The execution status tag is ready to read, and the Bluetooth module 30 broadcasts the status of the reader 100a. Further, the processor 10 sets the read status tag of the reader 100a to be readable, on behalf of the reader 100a, can perform a subsequent read process, and the processor 10 causes the read status of the reader 100a to be ready for reading. In response, the current state of the reader 100a is ready for reading, and the processor 10 updates the data packet to cause the Bluetooth module 30 to broadcast with the updated data packet, and other readers 100 located within the reading range. Therefore, the updated state of the reader 100a can be received.

In step 204, after the processor 10 delays the reader 100a for a first time, the processor 10 determines, according to the accepted data packet, whether the priority value is greater than the priority value of the reader 100 and the state is in the reading. Other readers. Further, after waiting for the first time length, the processor 10 reads the plurality of information tables stored in the storage module 40 again, and determines, according to the valid information table, whether the priority value is higher than the reader 100 itself. The execution status tag is the reader 100 in the reading. When the determination is yes, the process proceeds to step 205, and vice versa. It should be noted that the purpose of performing step 204 is to prevent the reader 100a from having the priority value of the other reader 100 higher than the reader 100 itself and the execution status label is read when the step 100 is performed. Therefore, the state of the plurality of readers 100 located within the reading range is again confirmed by performing step 204 to avoid occurrence of a reader collision. In addition, the higher the priority value of the reader 100, the shorter the first time corresponding to the reader 100, and the collision of the reader can be effectively avoided.

In step 205, the priority value of the reader 100a is incremented so that the execution status tag is in the initial state, and the Bluetooth module 30 broadcasts the execution status tag of the reader 100a. Further, since step 204 judges that the priority value of other readers 100 is higher than the reader 100a and its execution status tag is in the reading, the reader 100a gives up this time. Read. The processor 10 increases the priority value of the reader 100a, and makes the read status label unreadable, causes the execution status label to be the initial state, and the processor 10 updates the data packet so that the Bluetooth module 30 will update the data. The packet is broadcast, so that other readers 100 in the read range can know that the reader 100a will not perform the reading process.

In step 206, since the reader 100a is the reader with the highest priority value, the program can be read. Therefore, the processor 10 causes the execution state of the reader 100a to be read, and the processor 10 updates the data packet. Thereafter, the Bluetooth module 30 broadcasts the updated data packet so that the other readers 100 in the reading range can know that the reader 100a has entered the reading state.

In step 207, the processor 10 causes the reading module 20 to read a radio frequency identification tag. After the reading is completed, step 208 is performed. In step 208, the processor 10 causes the state of the reader 100a to be the end of reading, and the Bluetooth module 30 broadcasts the state of the reader 100a. Further, since the reader 100a has completed the process of reading the radio frequency identification tag, the processor 10 sets the execution status tag of the reader 100a to the end of reading, and the processor 10 updates the data packet to make the blue The bud module 30 broadcasts the updated data packet, and the other readers 100 in the reading range can know that the reader 100a has finished reading.

In step 209, the state of the reader 100a is made to sleep, and the Bluetooth module 30 is broadcasted to the state of the reader. Further, the processor 10 sets the read status label of the reader 100a to be unreadable, and the execution status label is set to sleep. After the processor 10 updates the data package, the Bluetooth module 30 causes the updated data packet to be encapsulated by the Bluetooth module 30. Broadcasting, other readers 100 in the read range can know that the reader 100a is no longer readable and is in a sleep state.

In step 210, after delaying a second time, the execution status label of the reader is initially Start state. Further, after the reader 100a waits for the second time, the processor 10 causes the execution status label to be in an initial state, that is, the reader 100a is ready for the next reading, after completing step 209 and returning to step 202, For the next reading. The length of the second time can be adjusted according to the number of readers 100 and the requirements.

FIG. 3 is a schematic diagram of another architecture embodiment of the reader 100 of the present invention. The difference between this embodiment and the embodiment of FIG. 1A is that the reader 100 of FIG. 3 further includes a switching module 50 and a plurality of reading modules 20. In this embodiment, the reader 100 includes a reading module. The group 20a and the reader 20b are taken as an example, but are not limited thereto. The switching module 50 is electrically connected between the processor 10 and the plurality of reading modules 20. The switching module 50 is configured to switch between the plurality of reading modules 20. The switching module 50 can be implemented by a multiplexer, but Not limited to this. In this embodiment, the storage module 40 further stores a number value corresponding to each of the reading modules 20 and a reading module number label. Therefore, when reading the radio frequency identification tag, the processor 10 can borrow The switching module 50 is switched to the corresponding reading module 20 by reading the current number value of the module number label, and then one of the reading modules 20 is read.

Please refer to FIG. 4. FIG. 4 is a schematic diagram of another embodiment of an operation method for operating according to an embodiment of the architecture of the reader 100 of FIG. The difference between FIG. 4 and FIG. 2 is that step 206a and step 207 further have step 206a, and step 208 and step 209 further have step 208a. In step 206a, the processor 10 switches the switching module 50 to the corresponding reading module 20 according to the number value of the reading module number tag, for example, the reading module 20a in FIG. 3, and the processor 10 The reading module 20a is driven to read the radio frequency identification tag. Therefore, in step 207, the radio frequency identification tag is read by the reading module 20a. In step 208a, processor 10 replaces the read module number. The number value of the tag is replaced by the number value of the corresponding reading module 20a, for example, by the number of the corresponding reading module 20b. Therefore, in the next reading cycle, the reader 100 will use the reading module 20b. Read it.

The method of operation of the RFID reader of the present invention gives readers different priorities, while allowing each reader to instantly receive read status tags, execution status tags, and other readers within the read range. Priority value. By this means, each reader can effectively determine whether there are other readers located in the reading range that are currently reading the label, so that multiple readers can be read simultaneously in the reading range. In addition, the existing reader can effectively reduce the collision of the reader by the operation method of the present invention without additionally adding an external control system, and the single reader can be provided with multiple reading modules, which can effectively reduce the implementation. The cost of consumption increases the value of business applications.

Although the present invention has been disclosed in the above embodiments, it is not intended to limit the present invention. Any one skilled in the art can make some modifications and retouchings without departing from the spirit and scope of the present invention. The scope is subject to the definition of the patent application scope.

Claims (10)

A method for operating a reader for a radio frequency identification, the reader comprising a processor, a storage module, a reading module, and a Bluetooth module, the processor, the storage module, the The reading module and the Bluetooth module are electrically connected, and the Bluetooth module continuously receives a plurality of data packets transmitted by the reader, each of the data packets including a priority value and a corresponding reader a state, the data is encapsulated and stored in the storage module, and the steps include: (a) the processor determines, according to the received data packets, whether the priority value is greater than the priority value of the reader and The state is the other reader in the reading; (b) when the determination is no, the state of the reader is read, the Bluetooth module broadcasts the state of the reader; (c) The reading module reads a radio frequency identification tag; and (d) causes the state of the reader to be the end of reading, and the Bluetooth module broadcasts the state of the reader. The method of claim 1, wherein the step of: causing the state of the reader to be an initial state before the step (a). The method of claim 2, the step comprising: after the step (a), (a1) making the state of the reader ready for reading, the Bluetooth module and broadcasting the reader status. The method of operation of claim 3, the steps comprising: After the step (a1), after (a2) is delayed by a first time, the processor determines, according to the received data packets, whether the priority value is greater than the priority value of the reader and the state is The other reader in the read. The method of operation of claim 4, wherein when the reader has a relatively high priority value, the first time of the delay is relatively short relative to the other time of the other reader. The operation method of claim 4, the step comprising: (e) after the step (d), (e) making the state of the reader sleep, and causing the Bluetooth module to broadcast the state of the reader . The operation method of claim 6, the step comprising: after the step (e), (f) delaying a second time, causing the execution status label of the reader to be an initial state. The operation method of claim 7, the step comprising: in the step (a) or (a2), when the determination is yes, increasing the priority value of the reader, so that the execution status label is an initial state The Bluetooth module broadcasts the execution status tag of the reader. The operating method of claim 2, wherein the reader further comprises a switching module and a plurality of the reading modules, the switching module being electrically connected between the processor and the reading module, Each of the read modules individually corresponds to a number value, and the step includes: after the step (b), (b1) driving the corresponding read module according to a read module number label. The method of operation of claim 9, wherein the steps include: After the step (d), (d1) replaces the number value stored in the read module number tag.