RFID tag pairing method and device and application method

Abstract

The invention discloses an RFID tag pairing method and device and an application method, and relates to the technical field of RFID tag communication, and the RFID tag pairing method comprises the steps: transmitting a pairing signal to a corresponding slave tag through each master tag; the slave tag is a tag physically connected with the master tag; each master tag is physically connected with one slave tag; traversing to obtain master label information and slave label information, and pairing the master label and the slave label which return the label information in the same time slice; and the master tag and the corresponding slave tag realize communication in the same communication time slice in a time sequence collaboration mode. According to the invention, the reader-writer communicates with the master tag and the slave tag in one communication time slice, so that the communication efficiency is greatly improved, and the time complexity in a tag pairing process is effectively reduced.

Description

Technical Field

[0001] The present application relates to the field of RFID tag communication technology, and in particular to an RFID tag pairing method, device and application method. Background Art

[0002] RFID uses a wireless communication method between a reader and multiple tags. The tags are in a passive working state. The power supply and commands come from the electromagnetic waves emitted by the reader. The tags transmit their own information to the reader by reflecting the electromagnetic waves of the reader.

[0003] It is necessary to find a tag among many RFID tags to be paired with another tag. However, the tag's card search process is random. The tag will send the tag information to the card machine only when the random number is loaded into the slot counter and the slot counter is decremented to zero according to the card machine command. It is impossible to obtain all the tag information and confirm the pairing relationship between the tags at the same time.

[0004] The current solution is to generate a high voltage through the main tag. After the slave tag detects the high voltage, it changes the internal information of the slave tag. The slave tag informs the card machine of the changed information, so that the card machine confirms the pairing relationship between the two tags. This solution is relatively inefficient and requires repeated card searches.

[0005] The specific existing solution is that, assuming there are N master tags, each corresponding to N slave tags; the reader first traverses the N master tags, selects a current master tag and sends a handshake high level to the slave tag physically connected to it; the reader then traverses the N slave tags and reads the level information received by the slave tag. If it is high, this slave tag is matched with the master tag, and the system associates the master tag with this slave tag and records it. The time complexity of this method is relatively high. Summary of the invention

[0006] The purpose of this application is to provide an RFID tag pairing method, device and application method, which can effectively reduce the time complexity of the tag pairing process.

[0007] To achieve the above objectives, this application provides the following solutions: In a first aspect, the present application provides an RFID tag pairing method, the RFID tag pairing method comprising: Send a pairing signal to the corresponding slave tag through each master tag; the slave tag is a tag physically connected to the master tag; each master tag is physically connected to a slave tag; Traverse and obtain the master tag information and the slave tag information, and pair the master tag and the slave tag that return the tag information in the same communication time slice; the master tag and the corresponding slave tag communicate with the reader / writer in the same communication time slice through timing coordination.

[0008] Optionally, each communication time slice includes two stages; the master tag and the corresponding slave tag communicate with the reader / writer in the same communication time slice by means of timing coordination, specifically including: In each communication process, the first stage of the communication time slice is for the reader to communicate with the master tag through the Select / Query / Ack command to obtain the master tag information; the second stage of the communication time slice is for the reader to communicate with the slave tag through the Req_Rn / Read command to obtain the slave tag information.

[0009] Optionally, the communication content of the first stage includes: identity information of the master tag; and the communication content of the second stage includes: identity information of the slave tag.

[0010] Optionally, sending a pairing signal to a corresponding slave tag through each master tag specifically includes: Each master tag changes the handshake signal between it and the corresponding slave tag.

[0011] In a second aspect, the present application provides an RFID tag pairing device, the RFID tag pairing device comprising: a reader / writer, a plurality of master tags and a plurality of slave tags; each of the master tags is physically connected to a slave tag; The reader / writer is used for: Sending a pairing signal to a corresponding slave tag through each of the master tags; the slave tag is a tag physically connected to the master tag; Traverse and obtain the master tag information and the slave tag information, and pair the master tag and the slave tag that return the tag information in the same communication time slice; the master tag and the corresponding slave tag communicate with the reader / writer in the same communication time slice through timing coordination.

[0012] Optionally, both the master tag and the slave tag are RFID tags; The reader / writer is an RFID reader / writer.

[0013] Optionally, the RFID tag is connected to the reader / writer via electromagnetic waves.

[0014] Optionally, the RFID tag is powered by the reader / writer and receives commands from the reader / writer.

[0015] Optionally, the RFID tag transmits its own information to the reader / writer by reflecting the electromagnetic waves of the reader / writer.

[0016] In a third aspect, the present application provides an application method of an RFID tag pairing device, the application method of the RFID tag pairing device comprising: Attach the master tag and the slave tag to the network port and the network cable respectively; the number of the network ports is several; the number of the network cables is several; Physically connecting the master tag and the slave tag on the corresponding network port and network cable respectively; A reader is used to send a pairing signal to a corresponding slave tag through each master tag; the slave tag is a tag physically connected to the master tag; the pairing signal is a level handshake signal sent from the master tag to the slave tag through a physical connection; The master tag information and the slave tag information are traversed and acquired by using the reader / writer, and the master tag and the slave tag that return the tag information in the same communication time slice are paired to obtain the pairing information; the master tag and the corresponding slave tag communicate with the reader / writer in the same communication time slice by means of timing coordination; A pairing relationship between the network port and the network cable is determined according to the pairing information.

[0017] According to the specific embodiments provided in this application, this application discloses the following technical effects: The present application provides an RFID tag pairing method, device and application method, the RFID tag pairing method comprising: sending a pairing signal to a corresponding slave tag through each master tag; the slave tag is a tag physically connected to the master tag; each master tag is physically connected to a slave tag; Traverse and obtain the master tag information and the slave tag information, and pair the master tag and the slave tag that return the tag information in the same communication time slice; the master tag and the corresponding slave tag communicate with the reader / writer in the same communication time slice through timing coordination. In this application, the reader / writer communicates with the master tag and the slave tag in one communication time slice, thereby greatly improving the communication efficiency and effectively reducing the time complexity of the tag pairing process. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 A schematic diagram of the communication process between a tag and a reader provided in Example 1 of the present application; Figure 2 A schematic diagram of the physical wiring pairing connection of two chips provided in Example 1 of the present application; Figure 3 A schematic diagram of a handshake level signal provided in Example 1 of the present application; Figure 4 The chip appearance and pad schematic diagram provided in Example 1 of the present application; Figure 5 A schematic diagram of a label structure provided in Example 1 of the present application; Figure 6 A schematic diagram of an existing standard communication protocol provided in Example 1 of the present application; Figure 7 A schematic diagram of the combined communication method used in this embodiment provided in Example 1 of the present application; Figure 8 A schematic diagram of actual waveforms of communication between a reader and a tag using air-eavesdropping equipment provided in the first embodiment of the present application; Fig. 9 A schematic diagram of identifying and obtaining the main tag information provided in Example 1 of the present application; Fig.10 The master tag provided in the first embodiment of the present application informs the slave tag via a physical connection line, and the slave tag then sends its own tag information schematic diagram to the card machine. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0021] In the existing scheme, suppose there are N master tags, each corresponding to N slave tags. The reader first traverses the N master tags, selects a current master tag and sends a handshake high level to the slave tag physically connected to it. The reader then traverses the N slave tags and reads the level information received by the slave tag. If it is high, then this slave tag is matched with the master tag. The system associates the master tag with this slave tag and records it. The reader selects the next master tag and repeats the above two steps. It can be seen that its time complexity is O(n 2 ).

[0022] The present application can increase the efficiency of obtaining tag pairing information. The application fields of the present application include but are not limited to: the associated pairing of cables, optical fibers, network cables and device interfaces, and the associated pairing between two items.

[0023] The specific meanings of the abbreviations used in the embodiments and drawings of this application are as follows: Abbreviated terms, instructions and notes: RFID: It is the abbreviation of Radio Frequency Identification, which means radio frequency identification. The principle is contactless data communication between the reader and the tag to achieve the purpose of identifying the target.

[0024] EPC: It is the abbreviation of Electronic product code, which means electronic product identification code.

[0025] DFN: It is the abbreviation of Dual Flat No-leads Package, which is an advanced packaging technology.

[0026] SOT: is a type of integrated circuit package.

[0027] CW: It is the abbreviation of Continuous wave, which means continuous carrier.

[0028] Q: Slot counter parameter.

[0029] Handle: handle, which is a 16-bit random number.

[0030] Select: Select command.

[0031] Query: card search command.

[0032] Queryrep: One of the group read card search instructions, used to decrement the slot counter.

[0033] Queryadjust: One of the group reading and card searching instructions, used to adjust the Q value.

[0034] Ack: Response command.

[0035] Req_rn: Request random number instruction.

[0036] Read: read instruction.

[0037] PC: It is the abbreviation of Protocol control, which means the protocol control bit and is used to determine the EPC length.

[0038] RN16: 16-bit random number.

[0039] CRC16: 16-bit cyclic redundancy check code.

[0040] Data: Data.

[0041] GND: Ground wire.

[0042] RF: It is the abbreviation of Radio Frequency, which means radio frequency.

[0043] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, the present application is further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0044] Embodiment 1 In an exemplary embodiment, a RFID tag pairing method is provided, comprising the following steps: S1. Send a pairing signal to a corresponding slave tag through each master tag; the slave tag is a tag physically connected to the master tag; each master tag is physically connected to one slave tag.

[0045] The sending of a pairing signal from each master tag to the corresponding slave tag specifically includes: each master tag changes the handshake signal between itself and the corresponding slave tag. The communication process between the tag and the reader is as follows: Figure 1 shown.

[0046] See also Figure 2 and Figure 3 In this embodiment, a handshake is first achieved through a physical connection between two labels. The physical connection between the two labels means that when this embodiment is applied to pairing between a network cable and a network port, since on-site operators may arbitrarily insert multiple network cables into different network ports, the network cable and the network port need to be paired. The master label and the slave label are respectively attached to the network cable and the corresponding network port, and a handshake is achieved through a physical connection between the two labels.

[0047] The tag is invertedly packaged with the antenna through conductive glue (common forms, but not limited to, gold wire binding, DFN, SOT, etc., in this embodiment, a special clamp can be used to attach them to items that need to be paired, such as network cables and network ports, and the two are plugged together, and the dual chips are interconnected into a combination to achieve reliable electrical interconnection and communication conditions). Figure 4 and Figure 5 As shown, Figure 5 In the chip pad diagram, B is the common ground gnd of the two tags, and A is the communication port of the two tags. For the master tag, A is the output level signal, and for the slave tag, A is the receiving level signal.

[0048] S2. Traverse and obtain the master tag information and the slave tag information, and pair the master tag and the slave tag that return the tag information in the same communication time slice; the master tag and the corresponding slave tag communicate with the reader / writer in the same communication time slice through timing coordination.

[0049] Each communication time slice includes two stages; the master tag and the corresponding slave tag communicate with the reader / writer in the same communication time slice by means of timing coordination, specifically including: In each communication process, the first phase of the communication time slice is for the reader to communicate with the master tag through commands such as Select (select) / Query (search for card) / Ack (answer) to obtain the master tag information; the second phase of the communication time slice is for the reader to communicate with the slave tag through commands such as Req_Rn (request random number) / Read (read) to obtain the slave tag information. The communication content of the first phase includes: the identity information of the master tag; the communication content of the second phase includes: the identity information of the slave tag.

[0050] In this embodiment, handshake is achieved through the physical connection between two tags, that is, when the card machine selects a tag through the card search instruction and obtains the detailed information of this tag, when one of the tags is found by the card machine (the master tag), it notifies the paired tag (the slave tag) through the physical connection, that is, this tag will change the level signal in the physical connection (this level signal is the handshake signal between the two tags), and the other tag connected to this physical connection will take over the communication with the card machine after detecting the change of the level signal on this physical connection (sending its own tag information to the card machine during this period), until the next communication time slice ends the communication with the card machine. In this way, the association of the information returned by the two tags is achieved, that is, the tag information of the two tags is obtained in the same communication time slice, and finally the pairing of the two tags is achieved. And the next communication time slice starts the pairing of the next pair of tags, and the pairing of multiple pairs of tags is achieved in the same inventory cycle.

[0051] The associated communication process is described as follows: See also Figure 6 The existing native standard communication protocol is as follows: the reader communicates with the master tag 1 (tag 1) and the slave tag 2 (tag 2) in different time slices. In the same communication time slice, the reader communicates with only one tag. When multiple tags communicate with the reader concurrently, the time slice selection of the tag session is random. Therefore, the order and position of the communication time slices of the master tag 1 and the slave tag 2 are uncertain.

[0052] For more detailed protocols, please refer to EPC ® Radio-Frequency Identity Generation-2 UHFRFID Standard Release 3.0, Ratified, Jan 2024, download link EPC UHF Gen2 AirInterface Protocol | GS1, Section 6.3.1.6 Link timing.

[0053] The existing pairing scheme is limited by the native standard communication protocol. In the inventory cycle of the master tag Tag1, the handshake signal A is set to high, and then all the slave tags are polled. When the reader polls the slave tag Tag2 and reads that its input level is high, it can determine that it corresponds to the master tag Tag1. When there are multiple master tags and multiple slave tags, the time complexity is O(n 2 ).

[0054] like Figure 7 As shown, in this embodiment, in the session of the main tag tag1, through the handshake signal A, the previous commands are all the communication between the main tag tag1 and the reader / writer, and the slave tag tag2 takes over the communication with the reader / writer in the subsequent Req_RN and Read commands, and at this time the main tag tag1 no longer communicates with the reader / writer. At this time, the effect of the two tags working together is no different from the communication with a single tag from the reader / writer's perspective. Because EPC carries the identity coding information of the main tag tag1, and Data carries the identity coding information of the slave tag tag2, the two are in the same session, indicating the binding relationship between the two. In this way, the efficiency of the reader / writer in obtaining the binding relationship is greatly improved, and only one traversal is required, and the time complexity is O(n). Among them, Req_RN is the command name of the protocol, requesting a random number. The Read command is a read command. EPC is a unique item identifier. Data is data. Handle is a handle. For ease of understanding, the actual waveform of the communication between the reader / writer and the tag using the device's air interception is attached, as shown Figure 8 shown.

[0055] This combination of two tags also communicates with the reader separately during the communication process (the reader does not distinguish the two tags by which tag antenna returns, but by the return sequence and the random number handle of the tag to define the tag individual communicating with it), but the collaborative communication effect is manifested as a single tag, which is innovative, so that the reader can quickly determine the binding association between the two. This embodiment can also be regarded as a hack of the native communication protocol, achieving an effect that was not expected when the native communication protocol was first formulated.

[0056] Simply put, in this embodiment, when one of the tags is found by the card machine, it notifies the paired tag through the physical connection, and the handshake is realized through the physical connection between the two tags, that is, when the card machine selects a tag as the main tag through card search polling and obtains the detailed information of this tag, this main tag will change the level signal in the physical connection (this level signal is the handshake signal between the two tags), and transmit this level signal as a handshake signal to the slave tag. After receiving the handshake signal, the slave tag of the physical connection takes over the subsequent communication between the master tag and the reader, and returns its own tag information to the reader, realizing the associated sending of the information returned by the two tags, thereby achieving the pairing of the two tags.

[0057] This embodiment is not limited to the communication protocols and command types shown in the figure, and the focus is on the timing and mechanism of the combination working in coordination like a tag through the connecting line.

[0058] In simple terms, in this embodiment, the reader / writer identifies and obtains the master tag information from a large number of tags. The master tag informs the slave tag through a physical connection line, and the slave tag then sends its own tag information to the card reader, so that the card reader obtains the pairing relationship between the master tag and the slave tag. Fig. 9 and Fig.10 shown.

[0059] Embodiment 2 In an exemplary embodiment, an RFID tag pairing device is provided, including: a reader / writer, a plurality of master tags and a plurality of slave tags; each of the master tags is physically connected to a slave tag.

[0060] The reader / writer is used for: Sending a pairing signal to a corresponding slave tag through each of the master tags; the slave tag is a tag physically connected to the master tag; Traverse and obtain the master tag information and the slave tag information, and pair the master tag and the slave tag that return the tag information in the same communication time slice; the master tag and the corresponding slave tag communicate with the reader / writer in the same communication time slice through timing coordination.

[0061] The master tag and the slave tag are both RFID tags; the reader / writer is an RFID reader / writer.

[0062] The RFID tag is connected to the reader / writer via electromagnetic waves.

[0063] The RFID tag is powered by the reader / writer and receives commands from the reader / writer.

[0064] The RFID tag transmits its own information to the reader / writer by reflecting the electromagnetic waves of the reader / writer.

[0065] Embodiment 3 In an exemplary embodiment, a method for applying an RFID tag pairing device is provided, comprising: A1. Attach the master tag and the slave tag to the network port and the network cable respectively; the number of the network ports is several; the number of the network cables is several.

[0066] A2. Physically connect the master tag and the slave tag on the corresponding network port and network cable respectively.

[0067] A3. Use a reader / writer to send a pairing signal to a corresponding slave tag through each master tag; the slave tag is a tag physically connected to the master tag; the pairing signal is a level handshake signal sent by the master tag to the slave tag through a physical connection.

[0068] A4. Use the reader / writer to traverse and obtain the master tag information and the slave tag information, and pair the master tag and the slave tag that return the tag information in the same communication time slice to obtain the pairing information; the master tag and the corresponding slave tag communicate with the reader / writer in the same communication time slice through timing coordination.

[0069] Those skilled in the art can understand that all or part of the processes in the above-mentioned embodiment methods can be completed by instructing the relevant hardware through a computer program, and the computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, any reference to the memory, database or other medium used in the embodiments provided in this application can include at least one of non-volatile and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetoresistive random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory can include random access memory (RAM) or external cache memory, etc. By way of illustration and not limitation, RAM may be in various forms, such as Static Random Access Memory (SRAM) or Dynamic Random Access Memory (DRAM).

[0070] The database involved in each embodiment provided in this application may include at least one of a relational database and a non-relational database. The non-relational database may include a distributed database based on blockchain, etc., but is not limited thereto. The processor involved in each embodiment provided in this application may be a general-purpose processor, a central processing unit, a graphics processor, a digital signal processor, a programmable logic device, a data processing logic device based on quantum computing, etc., but is not limited thereto.

[0071] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0072] This article uses specific examples to illustrate the principles and implementation methods of this application. The description of the above embodiments is only used to help understand the method and core ideas of this application. At the same time, for those skilled in the art, according to the ideas of this application, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting this application.

Claims

1. A RFID tag pairing method, characterized in that: The RFID tag pairing method comprises: Send a pairing signal to the corresponding slave tag through each master tag; the slave tag is a tag physically connected to the master tag; each master tag is physically connected to a slave tag; Traverse and obtain the master tag information and the slave tag information, and pair the master tag and the slave tag that return the tag information in the same communication time slice; the master tag and the corresponding slave tag communicate with the reader / writer in the same communication time slice through timing coordination.

2. The RFID tag pairing method according to claim 1, characterized in that: Each communication time slice includes two stages; the master tag and the corresponding slave tag communicate with the reader / writer in the same communication time slice by means of timing coordination, specifically including: In each communication process, the first stage of the communication time slice is for the reader to communicate with the master tag through the Select / Query / Ack command to obtain the master tag information; the second stage of the communication time slice is for the reader to communicate with the slave tag through the Req_Rn / Read command to obtain the slave tag information.

3. The RFID tag pairing method according to claim 2, characterized in that: The communication content of the first phase includes: the identity information of the master tag; the communication content of the second phase includes: the identity information of the slave tag.

4. The RFID tag pairing method according to claim 1, characterized in that: The sending of a pairing signal to a corresponding slave tag through each master tag specifically includes: Each master tag changes the handshake signal between it and the corresponding slave tag.

5. An RFID tag pairing device, characterized in that: The RFID tag pairing device includes: a reader / writer, a plurality of master tags and a plurality of slave tags; each of the master tags is physically connected to a slave tag; The reader / writer is used for: Sending a pairing signal to a corresponding slave tag through each of the master tags; the slave tag is a tag physically connected to the master tag; Traverse and obtain the master tag information and the slave tag information, and pair the master tag and the slave tag that return the tag information in the same communication time slice; the master tag and the corresponding slave tag communicate with the reader / writer in the same communication time slice through timing coordination.

6. The RFID tag pairing device according to claim 5, characterized in that: The master tag and the slave tag are both RFID tags; The reader / writer is an RFID reader / writer.

7. The RFID tag pairing device according to claim 6, characterized in that: The RFID tag is connected to the reader / writer via electromagnetic waves.

8. The RFID tag pairing device according to claim 6, characterized in that: The RFID tag is powered by the reader / writer and receives commands from the reader / writer.

9. The RFID tag pairing device according to claim 6, characterized in that: The RFID tag transmits its own information to the reader / writer by reflecting the electromagnetic waves of the reader / writer.

10. An application method of an RFID tag pairing device, characterized in that: The application method of the RFID tag pairing device includes: Attach the master tag and the slave tag to the network port and the network cable respectively; the number of the network ports is several; the number of the network cables is several; Physically connecting the master tag and the slave tag on the corresponding network port and network cable respectively; A reader is used to send a pairing signal to a corresponding slave tag through each master tag; the slave tag is a tag physically connected to the master tag; the pairing signal is a level handshake signal sent from the master tag to the slave tag through a physical connection; The master tag information and the slave tag information are traversed and acquired by using the reader / writer, and the master tag and the slave tag that return the tag information in the same communication time slice are paired to obtain the pairing information; the master tag and the corresponding slave tag communicate with the reader / writer in the same communication time slice by means of timing coordination; A pairing relationship between the network port and the network cable is determined according to the pairing information.

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