CN112528688B - Radio frequency tag control method, response method and device, storage medium, reader and radio frequency tag - Google Patents
Radio frequency tag control method, response method and device, storage medium, reader and radio frequency tag Download PDFInfo
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- CN112528688B CN112528688B CN201910887805.5A CN201910887805A CN112528688B CN 112528688 B CN112528688 B CN 112528688B CN 201910887805 A CN201910887805 A CN 201910887805A CN 112528688 B CN112528688 B CN 112528688B
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
- G06K7/10—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation
- G06K7/10009—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves
- G06K7/10158—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves methods and means used by the interrogation device for reliably powering the wireless record carriers using an electromagnetic interrogation field
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
- G06K7/10—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation
- G06K7/10009—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
- G06K7/10—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation
- G06K7/10009—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves
- G06K7/10297—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves arrangements for handling protocols designed for non-contact record carriers such as RFIDs NFCs, e.g. ISO/IEC 14443 and 18092
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Abstract
A radio frequency tag control method, a response method and a device, a storage medium, a reader and a radio frequency tag, wherein the radio frequency tag control method comprises the following steps: a first instruction is sent, so that a first radio frequency tag receiving the first instruction detects electric quantity; transmitting a second instruction so that a second radio frequency tag receiving the second instruction transmits a first response; transmitting a third instruction so that a third radio frequency tag receiving the third instruction transmits a second response in response to the third instruction; at least when the tag electric quantity is larger than a preset threshold value, a fourth instruction is sent to the third radio frequency tag, so that the third radio frequency tag receiving the fourth instruction enables a power supply module to supply power; and sending refreshing data to the third radio frequency tag. The technical scheme of the invention can manage the power supply of the tag and realize effective interaction of data.
Description
Technical Field
The present invention relates to the field of radio frequency technologies, and in particular, to a radio frequency tag control method, a response method, a device, a storage medium, a reader, and a radio frequency tag.
Background
Radio frequency identification (Radio Frequency Identification, RFID) is a non-contact automatic identification technology, which automatically identifies a target object through radio frequency signals and acquires related data, and the identification work does not need manual intervention and can work in various severe environments. The RFID can identify high-speed moving objects and simultaneously identify a plurality of electronic tags, and is rapid and convenient to operate.
An RFID system is a simple wireless system with only two basic devices for controlling, detecting and tracking objects. An RFID system consists of an interrogator (also called reader) and a number of transponders (also called or electronic tags). The RFID is divided into Low Frequency (LF), high Frequency (HF), ultra High Frequency (UHF) and Microwave (MW) according to different application frequencies, and corresponding representative frequencies are respectively: low frequency below 135KHz, high frequency 13.56MHz, ultra-high frequency 860M-960MHz, microwave 2.4GHz and 5.8GHz.
Electronic tags (tags) are typically composed of a coupling element and a chip of radio frequency tags, each having a unique electronic code, attached to an object to identify a target object; a Reader (Reader) device for reading (or sometimes writing) electronic tag information, which may be designed to be handheld or stationary; an Antenna (Antenna) transmits radio frequency signals between the electronic tag and the reader. The basic working principle of the RFID technology is not complex, after the electronic Tag enters a magnetic field, the electronic Tag receives a radio frequency signal sent by a reader, and the product information (Passive Tag or Passive Tag) stored in a chip of the radio frequency Tag is sent out by the energy obtained by virtue of the induction current; or actively transmitting a signal (Active Tag, active Tag or Active Tag) of a certain frequency; the reader reads the information and decodes the information, and then sends the information to the central information system for relevant data processing.
The reader may be a read or read/write device, depending on the architecture and technology used, and is an RFID system information control and processing center. The reader is generally composed of a coupling module, a transceiver module, a control module and an interface unit. The reader and transponder generally exchange information in a half duplex communication mode, and the reader provides energy and time sequence for the passive transponder through coupling. In practical applications, the management functions of collecting, processing, remote transmitting and the like of the object identification information can be further realized through Ethernet (Ethernet), wireless local area network (Wireless Local Area Network, WLAN) and the like. Transponders are information carriers of RFID systems, which are nowadays mostly passive units composed of coupling elements (coils, microstrip antennas, etc.) and chips of micro radio frequency tags.
However, with the development of RFID technology, the trend of the RFID tag gradually changes from a closed loop system to an intermediate node of a passive wireless scheme, that is, the RFID tag can provide energy to the third device, implement data interaction with the third device, and return an interaction result to the reader. In the above scenario, how to manage the power supply of the tag to realize effective interaction of data is a problem to be solved.
Disclosure of Invention
The invention solves the technical problem of managing the power supply of the tag so as to realize effective interaction of data.
In order to solve the above technical problems, an embodiment of the present invention provides a radio frequency tag control method, where the radio frequency tag control method includes: a first instruction is sent, so that a first radio frequency tag receiving the first instruction detects electric quantity; transmitting a second instruction to enable a second radio frequency tag receiving the second instruction to transmit a first response, wherein the first response comprises handshake authentication information; transmitting a third instruction to enable a third radio frequency tag receiving the third instruction to respond to the third instruction and transmit a second response, wherein the second response comprises identification information of the radio frequency tag and detected tag electric quantity, and the third instruction comprises handshake authentication information; at least when the tag electric quantity is larger than a preset threshold value, a fourth instruction is sent to the third radio frequency tag, so that the third radio frequency tag receiving the fourth instruction enables a power supply module to supply power; and sending refreshing data to the third radio frequency tag.
Optionally, the sending the second instruction includes: transmitting a first sub-instruction to enable a second radio frequency tag receiving the first sub-instruction to generate a random number; transmitting a second sub-instruction, so that a second radio frequency tag receiving the second sub-instruction divides the random number by 2; and sending a third sub-instruction so that the second radio frequency tag receiving the third sub-instruction subtracts one from the random number.
Optionally, the third radio frequency tag sending a second response in response to the third instruction means that the second response is sent when the random number is 0.
Optionally, before sending the first instruction, the method further includes: transmitting a carrier without signal modulation and maintaining a first preset time period; after the first instruction is sent, and before the second instruction is sent, the method further comprises the following steps: transmitting a carrier without signal modulation and maintaining a second preset time period; after the second instruction is sent, and before the third instruction is sent, the method further comprises: transmitting a carrier without signal modulation and maintaining a third preset time period; after the third instruction is sent, and before the fourth instruction is sent, the method further comprises: and transmitting the carrier without signal modulation and maintaining the fourth preset time period.
Optionally, the sending the refresh data to the third radio frequency tag includes: and transmitting the refresh data in a fifth preset time period.
Optionally, before sending the first instruction, the method includes: receiving a to-be-refreshed list, wherein the to-be-refreshed list comprises a plurality of identifiers of radio frequency tags to be refreshed and refresh data corresponding to each radio frequency tag to be refreshed; the sending the refresh data to the third radio frequency tag includes: searching refreshing data corresponding to the third radio frequency tag in the to-be-refreshed list according to the identifier of the third radio frequency tag; and sending the refresh data corresponding to the third radio frequency tag.
Optionally, the radio frequency tag control method further includes: and if the refresh data corresponding to the third radio frequency tag is successfully sent, removing the identification of the third radio frequency tag from the to-be-refreshed list.
Optionally, the sending a fourth instruction to the third radio frequency tag at least when the tag electric quantity is greater than a preset threshold value includes: and when the tag electric quantity is larger than the preset threshold value and the identifier of the third radio frequency tag is positioned in the list to be refreshed, sending the fourth instruction to the third radio frequency tag.
Optionally, the first instruction, the second instruction, the third instruction and the fourth instruction are selected from an instruction set in EPC C1G2 protocol, wherein the first instruction, the second instruction, the third instruction and the fourth instruction are respectively different instructions in the instruction set.
Optionally, the instruction set includes a select instruction, a query instruction, a query_adj instruction, a query_rep instruction, and an ACK.
In order to solve the technical problems, the embodiment of the invention also discloses a response method, which comprises the following steps: receiving a first instruction from a reader, and detecting electric quantity after receiving the first instruction; receiving a second instruction from the reader, and sending a first response after receiving the second instruction, wherein the first response comprises handshake authentication information; receiving a third instruction from the reader, and responding to the third instruction to send a second response after receiving the third instruction, wherein the second response comprises identification information of the radio frequency tag and the detected tag electric quantity, and the third instruction comprises the handshake authentication information; if the electric quantity of the tag is larger than a preset threshold value, a fourth instruction from the reader is received, and the power supply module is enabled to supply power after the fourth instruction is received; and receiving refresh data from the reader.
In order to solve the technical problem, the embodiment of the invention also discloses a radio frequency tag control device, which is used for a reader, and the radio frequency tag control device comprises: the first instruction sending module is used for sending a first instruction so that a first radio frequency tag receiving the first instruction detects electric quantity; the second instruction sending module is used for sending a second instruction so that a second radio frequency tag receiving the second instruction sends a first response, and the first response comprises handshake authentication information; a third instruction sending module, configured to send a third instruction, so that a third radio frequency tag that receives the third instruction sends a second response in response to the third instruction, where the second response includes identification information of the radio frequency tag and detected tag electric quantity, and the third instruction includes the handshake authentication information; the fourth instruction sending module is used for sending a fourth instruction to the third radio frequency tag at least when the tag electric quantity is larger than a preset threshold value, so that the third radio frequency tag receiving the fourth instruction enables the power supply module to supply power; and the refreshing data transmitting module is used for transmitting refreshing data to the third radio frequency tag.
In order to solve the technical problem, the embodiment of the invention also discloses a response device, which is used for the radio frequency tag and comprises: the electric quantity detection module is used for receiving a first instruction from the reader and detecting electric quantity after receiving the first instruction; the authentication information sending module is used for receiving a second instruction from the reader and sending a first response after receiving the second instruction, wherein the first response comprises handshake authentication information; the electric quantity sending module is used for receiving a third instruction from the reader, responding to the third instruction after receiving the third instruction, and sending a second response, wherein the second response comprises identification information of the radio frequency tag and the detected tag electric quantity, and the third instruction comprises the handshake authentication information; the enabling power supply module is used for receiving a fourth instruction from the reader when the electric quantity of the tag is larger than a preset threshold value and enabling the power supply module to supply power after receiving the fourth instruction; and refreshing the data receiving module. To receive refresh data from the reader.
The embodiment of the invention also discloses a reader, which comprises a memory and a processor, wherein the memory stores computer instructions capable of running on the processor, and the processor executes the steps of the radio frequency tag control method when running the computer instructions.
The embodiment of the invention also discloses a radio frequency tag which comprises a memory and a processor, wherein the memory stores computer instructions capable of running on the processor, and the processor executes the steps of the response method when running the computer instructions.
The embodiment of the invention also discloses a storage medium, wherein the storage medium is stored with computer instructions, and the computer instructions execute the steps of the radio frequency tag control method or execute the steps of the response method when running.
Compared with the prior art, the technical scheme of the embodiment of the invention has the following beneficial effects:
according to the technical scheme, the first instruction is sent, so that the first radio frequency tag which receives the first instruction detects electric quantity; transmitting a second instruction to enable a second radio frequency tag receiving the second instruction to transmit a first response, wherein the first response comprises handshake authentication information; transmitting a third instruction to enable a third radio frequency tag receiving the third instruction to respond to the third instruction and transmit a second response, wherein the second response comprises identification information of the radio frequency tag and detected tag electric quantity, and the third instruction comprises handshake authentication information; at least when the tag electric quantity is larger than a preset threshold value, a fourth instruction is sent to the third radio frequency tag, so that the third radio frequency tag receiving the fourth instruction enables a power supply module to supply power; and sending refreshing data to the third radio frequency tag. According to the technical scheme, the reader can respond to different instructions to execute different actions by sending different instructions to the radio frequency tag, specifically, the method can detect electric quantity, send tag electric quantity and the like, and when the tag electric quantity is enough, the reader can conduct data interaction with the radio frequency tag so as to ensure that refresh data can be successfully received by the radio frequency tag, avoid invalid data transmission between the reader and the radio frequency tag and further improve efficiency of radio frequency data interaction.
Drawings
FIG. 1 is a flowchart of a control method of a radio frequency tag according to an embodiment of the present invention;
FIG. 2 is a flow chart of one embodiment of step S102 shown in FIG. 1;
FIG. 3 is a flowchart of another RFID tag control method according to an embodiment of the present invention;
FIG. 4 is a flowchart of another radio frequency tag control method according to an embodiment of the present invention;
FIG. 5 is a flow chart of a response method according to an embodiment of the invention;
fig. 6 is a schematic structural diagram of a radio frequency tag control device according to an embodiment of the present invention;
fig. 7 is a schematic structural diagram of a response device according to an embodiment of the present invention.
Detailed Description
As described in the background art, how to manage the power supply of the tag in the passive tag or the passive tag scene, so as to realize effective interaction of data is a problem to be solved.
According to the technical scheme, the reader can respond to different instructions to execute different actions by sending different instructions to the radio frequency tag, specifically, the method can detect electric quantity, send tag electric quantity and the like, and when the tag electric quantity is enough, the reader can conduct data interaction with the radio frequency tag so as to ensure that refresh data can be successfully received by the radio frequency tag, avoid invalid data transmission between the reader and the radio frequency tag and further improve efficiency of radio frequency data interaction.
In order that the above objects, features and advantages of the invention will be readily understood, a more particular description of the invention will be rendered by reference to specific embodiments thereof which are illustrated in the appended drawings.
Fig. 1 is a flowchart of a radio frequency tag control method according to an embodiment of the present invention.
The radio frequency tag control method can be used on the reader side, i.e. the reader can execute the steps of the method shown in fig. 1.
The radio frequency tag control method may include the steps of:
step S101: a first instruction is sent, so that a first radio frequency tag receiving the first instruction detects electric quantity;
step S102: transmitting a second instruction to enable a second radio frequency tag receiving the second instruction to transmit a first response, wherein the first response comprises handshake authentication information;
step S103: transmitting a third instruction to enable a third radio frequency tag receiving the third instruction to respond to the third instruction and transmit a second response, wherein the second response comprises identification information of the radio frequency tag and detected tag electric quantity, and the third instruction comprises handshake authentication information;
step S104: at least when the tag electric quantity is larger than a preset threshold value, a fourth instruction is sent to the third radio frequency tag, so that the third radio frequency tag receiving the fourth instruction enables a power supply module to supply power;
Step S105: and sending refreshing data to the third radio frequency tag.
It should be noted that the serial numbers of the steps in the present embodiment do not represent a limitation on the execution sequence of the steps.
The first instruction, the second instruction, the third instruction, and the fourth instruction in this embodiment are different instructions.
Because the short-range communication is performed between the reader and the chip of the radio frequency tag, in the implementation of step S101, after the reader sends the first instruction, the radio frequency tag within the communication distance range of the reader can receive the first instruction. The first radio frequency tag is a radio frequency tag which receives a first instruction.
The first radio frequency tag can execute the operation of detecting the electric quantity in response to the first instruction, namely the first radio frequency tag detects the own tag electric quantity.
It should be noted that, the specific implementation manner of the radio frequency tag for detecting the electric quantity may refer to the prior art, and the embodiment of the present invention is not limited thereto.
In an implementation of step S102, the reader may send a second instruction. The second instruction is sent after the first instruction is sent by the reader.
The second radio frequency tag is a radio frequency tag which receives a second instruction. The second radio frequency tag may send a first response in response to the second instruction, the first response including handshake authentication information. The handshake authentication information is used to establish a secure communication connection between the radio frequency tag and the reader.
Specifically, the handshake authentication information may be a random number generated inside the second radio frequency tag. For example, a 16-bit random number.
In a specific implementation of step S103, the reader may send a third instruction, where the third instruction includes the handshake authentication information. The third instruction is sent after the reader sends the second instruction.
The third radio frequency tag is a radio frequency tag which receives a third instruction and sends a second response. The third radio frequency tag may send a second response in response to the third instruction, the second response including identification information of the radio frequency tag and the detected tag power.
Specifically, after receiving the third instruction, the third radio frequency tag may verify a priori whether the handshake authentication information in the third instruction is consistent with the handshake authentication information generated and sent before. If so, a second response is sent, otherwise, the second response is not sent.
In a specific embodiment of the present invention, the third radio frequency tag transparently transmits the refresh data to a third party device, and the third party device receives the refresh data and feeds back a refresh flag level to the third radio frequency tag after the refresh is successful, and the third radio frequency tag carries the refresh flag level in a second response sent next time. Specifically, after the data refreshing is completed, the radio frequency tag does not return the refreshing mark level to the reader immediately, but records the refreshing mark level in the radio frequency tag, and the refreshing mark level is carried in the next second response of the radio frequency tag and returns to the reader. If the refresh flag level in the second response returned by the radio frequency tag indicates that the data refresh has been completed, the reader considers that the radio frequency tag has successfully completed the refresh, and the enabling, data transmitting and refreshing steps are not further implemented.
Specifically, the third party device may be an ink screen, an intelligent unlocking device, or the like, which is not limited by the embodiment of the present invention.
In another embodiment of the present invention, when the reader determines that the tag electric quantity of the radio frequency tag is greater than the preset threshold, it may determine that the radio frequency tag can successfully transmit the refresh data, that is, when the reader determines that the tag electric quantity of the radio frequency tag is greater than the preset threshold, it may determine that the refresh of the refresh data is successful.
In the implementation of step S104, the reader may receive the second response sent by the third radio frequency tag, and determine whether the tag electric quantity in the second response is greater than a preset threshold. And when the electric quantity of the tag is larger than a preset threshold value, the reader can send a fourth instruction to the third radio frequency tag.
Each radio frequency tag can internally comprise a power supply module, and the power supply module can provide power for the radio frequency tag. The third radio frequency tag can receive the fourth instruction and enable the power supply module to supply power in response to the fourth instruction. In this case, the third radio frequency tag starts to operate.
Further in the implementation of step S105, the reader may send refresh data to the third radio frequency tag. Since the third radio frequency tag has enabled power to the third party device, the refresh data may be effectively received by the third party device after transmission out of the third radio frequency tag.
In the embodiment of the invention, the reader can respond to different instructions to execute different actions by sending different instructions to the radio frequency tag, specifically can detect electric quantity, send tag electric quantity and the like, and can perform data interaction with the radio frequency tag when the tag electric quantity is enough so as to ensure that refresh data can be successfully received by the radio frequency tag, avoid invalid data transmission between the reader and the radio frequency tag and further improve the efficiency of radio frequency data interaction.
As mentioned above, when the tag electric quantity is greater than the preset threshold, the reader sends a fourth instruction to the third radio frequency tag. And when the electric quantity of the tag does not reach the preset threshold value, the reader continuously sends the second instruction.
The embodiments of the present invention are not limited with respect to the number of times the second instruction is repeatedly sent.
In a non-limiting embodiment of the present invention, the first instruction, the second instruction, the third instruction and the fourth instruction may be custom control instructions, and specific content and form may be set according to an actual application environment, which is not limited by the embodiment of the present invention.
In another non-limiting embodiment of the present invention, the first instruction, the second instruction, the third instruction, and the fourth instruction are selected from a set of instructions in an EPC C1G2 protocol, wherein the first instruction, the second instruction, the third instruction, and the fourth instruction are each different instructions in the set of instructions.
In the embodiment of the invention, the EPC C1G2 protocol (class 1 and 2 generation UHF RFID 860 MHz-960 MHz communication protocol) is multiplexed, and the instruction set in the protocol can also be called ISO18000-6C protocol, so that the modification of the bottom layer architecture of the reader can be avoided, and the application range of the technical scheme of the invention is enlarged.
Further, the instruction set includes a select instruction, a query instruction, a query_adj instruction, a query_rep instruction, an ACK.
In a specific application scenario, the first instruction may be an instruction Select, where a Target (Target) parameter in the first instruction selects one of 0x101, 0x110, and 0x 111; the second instruction may be an instruction Query; the third instruction may be an instruction query_adj; the fourth instruction may be an instruction query_rep; the fifth instruction may be an instruction ACK; the sixth instruction may be an instruction Select, and the Target (Target) parameter in the sixth instruction selects one of 0x101, 0x110, 0x 111. More specifically, the Target parameters in the first instruction and the sixth instruction are different, for example, the Target parameter of the first instruction is 0x101, and the Target parameter of the sixth instruction is 0x110.
Wherein, the instruction Select, the instruction Query, the instruction query_adj, the query_rep and the instruction ACK are all standard commands under EPC C1G2 protocol
Accordingly, the first response may be a standard response under the EPC C1G2 protocol and the second response may be a standard ACK response under the EPC C1G2 protocol.
In a non-limiting embodiment of the present invention, referring to fig. 2, step S102 shown in fig. 1 may include the following steps:
step S201: transmitting a first sub-instruction to enable a second radio frequency tag receiving the first sub-instruction to generate a random number;
step S202: transmitting a second sub-instruction, so that a second radio frequency tag receiving the second sub-instruction divides the random number by 2;
step S203: and sending a third sub-instruction so that the second radio frequency tag receiving the third sub-instruction subtracts one from the random number.
In particular implementations, the second instruction may include a plurality of sub-instructions, namely a first sub-instruction, a second sub-instruction, and a third sub-instruction. The second radio frequency tag may perform different operations in response to different sub-instructions.
It should be noted that, in practical applications, one of steps S202 and S203 may be selectively performed.
In this embodiment, the reader may cause the radio frequency tag to perform different actions and generate different random numbers by sending different sub-commands. The third device tag transmits a second response only when the random number reaches a certain value. Under the scene of multiple tags, namely when a plurality of radio frequency tags are arranged in the communication range of the reader, the mode can avoid that the radio frequency tags simultaneously send the second response, so that the collision of data sent by the tags is avoided, and the efficiency of radio frequency interaction is further improved.
In a specific application scenario, after receiving the first sub-instruction, the radio frequency tag in the field generates a random number, and under the adjustment of the second sub-instruction and the third sub-instruction, the radio frequency tag reaches a state of internal random number=0 in a staggered sequence. For any radio frequency tag with a random number=0, a second response is returned, and after the reader determines the second response, the reader determines whether to continue to apply the fourth instruction and data or to continue to repeat the process of sending the second sub-instruction and the third sub-instruction. Thus, even if there are a large number of rf tags in the field region, and at the same time the capability of the rf tags in the field region to receive wireless energy varies greatly (even if a part of the tags cannot always receive enough energy), the mechanism can give priority to sensitivity, and at the same time, the mechanism of random anti-collision in the rf tag set with the same level of sensitivity can realize refreshing of the maximum number of tags in the shortest time.
Further, the third radio frequency tag sending a second response in response to the third instruction means that the second response is sent when the random number is 0.
Specifically, the random number may be directly generated by the second radio frequency tag when the first sub-instruction is received, may be calculated when the second sub-instruction is received, or may be calculated when the third sub-instruction is received.
In one non-limiting embodiment of the present invention, referring to fig. 3, the method may comprise the steps of:
step S301: and transmitting the carrier without signal modulation and maintaining the first preset time period.
In this embodiment, since the rf tag needs the rf energy around it to charge, before the reader sends the first command, the carrier without signal modulation with the holding time being the first preset period of time may be sent. The radio frequency tags within communication range of the reader can be charged by using the radio frequency energy of the carrier wave.
Step S302: transmitting a carrier without signal modulation and maintaining a second preset time period;
step S303: transmitting a carrier without signal modulation and maintaining a third preset time period;
step S304: and transmitting the carrier without signal modulation and maintaining the fourth preset time period.
In this embodiment, since the radio frequency tag has a reset function, reset occurs when the signal with the reader is interrupted, in order to ensure continuous and effective communication between the reader and the radio frequency tag, a carrier wave without signal modulation needs to be transmitted between the reader and the first, second, third and fourth instructions, so as to ensure that the radio frequency tag does not have power-down reset between every two instructions.
In addition, when the radio frequency tag responds to each instruction to execute the action, the reader can send a carrier wave without signal modulation in the time period to ensure the communication continuity because a certain time is required for executing the action. That is, the time lengths of the second preset time period, the third preset time period, and the fourth preset time period may be set with reference to the time required for the rfid tag to respond to the instruction to perform the action, which is not limited in the embodiment of the present invention.
In one non-limiting embodiment of the present invention, step S105 shown in fig. 1 may include the steps of:
step S305: and transmitting the refresh data in a fifth preset time period.
In consideration of the possible difference in the amount of the refresh data transmitted from the reader to each radio frequency tag, the present embodiment may transmit the refresh data within a fixed length of time period, that is, within a fifth preset time period
In a non-limiting embodiment of the present invention, referring to fig. 4, the following steps may be included before step S101 shown in fig. 1:
step S401: and receiving a to-be-refreshed list, wherein the to-be-refreshed list comprises a plurality of identifiers of radio frequency tags to be refreshed and refresh data corresponding to each radio frequency tag to be refreshed.
In this embodiment, the to-be-refreshed list may be preset by the user. The to-be-refreshed list comprises identifiers of a plurality of to-be-refreshed radio frequency tags and refresh data corresponding to each to-be-refreshed radio frequency tag.
It will be appreciated that the refresh data in the to-be-refreshed list may be the same or different.
Further, when the reader sends the refresh data, the refresh data can be sent to all the radio frequency tags, and the radio frequency tags can determine whether the corresponding refresh data is the corresponding refresh data according to the identification of the radio frequency tags in the list to be refreshed.
Step S105 shown in fig. 1 may include the steps of:
step S402: searching refreshing data corresponding to the third radio frequency tag in the to-be-refreshed list according to the identifier of the third radio frequency tag;
step S403: and sending the refresh data corresponding to the third radio frequency tag.
If the identifier of the third radio frequency tag exists in the to-be-refreshed list, after the reader sends the refresh data corresponding to the identifier to all the radio frequency tags, only the third radio frequency tag can receive the refresh data so as to ensure the receiving order of the refresh data.
Further, the method may further comprise the steps of: step S404: and if the refresh data corresponding to the third radio frequency tag is successfully sent, removing the identification of the third radio frequency tag from the to-be-refreshed list.
In this embodiment, in order to ensure accuracy of data transmission, after the transmission of the refresh data is successful, the identifier of the third radio frequency tag may be removed from the to-be-refreshed list, so as to avoid repeated data transmission to the third radio frequency tag.
Further, step S104 shown in fig. 1 may include the following steps: and when the tag electric quantity is larger than the preset threshold value and the identifier of the third radio frequency tag is positioned in the list to be refreshed, sending the fourth instruction to the third radio frequency tag.
The fourth instruction is to control the power supply module of the radio frequency tag to supply power, and the radio frequency tag starts to work. And when the electric quantity of the tag is larger than the preset threshold value and the identifier of the third radio frequency tag is positioned in the to-be-refreshed list, the radio frequency tag can start working and needs to receive data, and a fourth instruction is sent to the third radio frequency tag so as to control the third radio frequency tag to start working.
If the tag electric quantity is greater than the preset threshold value but the identifier of the third radio frequency tag is not located in the to-be-refreshed list, which means that the third radio frequency tag can work but does not have data to be received, the third radio frequency tag can not be started under the condition so as to avoid wasting the electric quantity of the radio frequency tag. If the tag electric quantity is not greater than the preset threshold value but the identifier of the third radio frequency tag is located in the to-be-refreshed list, the third radio frequency tag is indicated to have data to be received but not be capable of working, and in this case, the third radio frequency tag may not be started.
In a specific application scenario of the present invention, the reader transmits a carrier without signal modulation to the field, maintaining the first preset time period T1. Thereafter, the reader modulates the first command 1 to the carrier wave to be transmitted to the field region. After the radio frequency tag is powered on, a first instruction 1 is received, and a chip of the radio frequency tag starts to implement electric quantity detection.
After the first instruction 1 is sent, the reader continues to send the carrier without signal modulation, and maintains the second preset time period T2. Thereafter, the reader modulates the first sub-command 2 to the carrier wave to be transmitted to the field region. The radio frequency tag receives the first sub-instruction 2 and internally generates a random number controlled by the parameters of the first sub-instruction 2.
After the first sub-command 2 is sent, the reader maintains the carrier for a third preset period of time T3. The reader may choose to send the second sub-instruction 3 for a time T4 or choose to send the third sub-instruction 4 for a time T5. When the radio frequency tag receives the second sub-instruction 3, dividing the internal random number by 2; when the radio frequency tag receives the third sub-instruction 4, the internal random number is decremented by 1. When the random number in the radio frequency tag is equal to 0, the tag transmits a first response 1. The first response 1 comprises handshake authentication information.
Specifically, the reader may repeatedly send the second sub-instruction 3 and the third sub-instruction 4 a plurality of times; the radio frequency tag may respond to any one of the first sub-instruction 2, the second sub-instruction 3, and the third sub-instruction 4.
After the reader receives the first response 1 of any radio frequency tag, the reader sends a third instruction 5 to the radio frequency tag. The radio frequency tag receives the third instruction 5, and verifies that the third instruction 5 contains the correct verification information of the first response 1 sent by the tag itself, and the radio frequency tag sends the second response 2. The second response 2 includes at least the ID of the radio frequency tag and the current tag power.
When the reader receives the response (marked as a second response 2) of the third instruction 5 from the radio frequency tag within the fourth preset time period T5, the reader verifies and parses the content of the second response 2. The reader verifies the tag ID and judges the tag electric quantity information. If the tag ID passes the verification and the tag power is greater than the preset threshold, the reader continues to send a fourth command 6 to the radio frequency tag. The radio frequency tag receives the fourth instruction 6, and outputs an enabling signal as a trigger for starting other modules (such as a power supply module) of the tag except the chip of the radio frequency tag.
Then the reader sends one or more pieces of refreshing data to the radio frequency tag after a fifth preset time period T6; each segment of data comprises a preamble, a data body and a termination code. The data preamble must be distinguished from all instruction codes supported by the chip of the radio frequency tag, so as to avoid chip error response of the radio frequency tag. The radio frequency tag receives the refreshing data, the data pin of the radio frequency tag works in a transparent transmission mode, and the pin outputs the data received by the chip of the radio frequency tag from the reader in a transparent transmission mode. And after the radio frequency tag is powered down, the radio frequency tag is restored to the initial state.
The reader continues to maintain the carrier for the T7 time. The reader continues to repeat the transmission of the second sub-instruction 3 and the third sub-instruction 4 until a new tag response is provided or the number of transmissions of the second sub-instruction 3 and the third sub-instruction 4 has reached an upper limit of the defined value. If a new tag response is present, a third instruction 5 is sent to the new tag until T7. The reader repeatedly transmits the second sub-instruction 3 and the third sub-instruction 4. If the number of the second sub-command 3 and the third sub-command 4 reaches the upper limit of the preset value, the reader closes the carrier wave and commands to end.
Referring to fig. 5, the embodiment of the present invention further discloses a response method for the radio frequency tag side, that is, the radio frequency tag may execute each step of the method shown in fig. 5.
The response method may include the steps of:
step S501: receiving a first instruction from a reader, and detecting electric quantity after receiving the first instruction;
step S502: receiving a second instruction from the reader, and sending a first response after receiving the second instruction, wherein the first response comprises handshake authentication information;
step S503: receiving a third instruction from the reader, and responding to the third instruction to send a second response after receiving the third instruction, wherein the second response comprises identification information of the radio frequency tag and the detected tag electric quantity, and the third instruction comprises the handshake authentication information;
Step S504: if the electric quantity of the tag is larger than a preset threshold value, a fourth instruction from the reader is received, and the power supply module is enabled to supply power after the fourth instruction is received;
step S505: and receiving refresh data from the reader.
For more specific embodiments of the response method, please refer to the related descriptions in fig. 1 to 4, and the detailed description is omitted herein.
Referring to fig. 6, the embodiment of the present invention further discloses a radio frequency tag control device 60, where the radio frequency tag control device 60 includes:
the first instruction sending module 601 is configured to send a first instruction, so that a first radio frequency tag that receives the first instruction detects electric quantity;
a second instruction sending module 602, configured to send a second instruction, so that a second radio frequency tag that receives the second instruction sends a first response, where the first response includes handshake authentication information;
a third instruction sending module 603, configured to send a third instruction, so that a third radio frequency tag that receives the third instruction sends a second response in response to the third instruction, where the second response includes identification information of the radio frequency tag and the detected tag electric quantity, and the third instruction includes the handshake authentication information;
A fourth instruction sending module 604, configured to send a fourth instruction to the third radio frequency tag at least when the tag electric quantity is greater than a preset threshold, so that the third radio frequency tag that receives the fourth instruction enables a power supply module to supply power;
and the refresh data transmitting module 605 is configured to transmit refresh data to the third radio frequency tag.
For more details of the working principle and the working manner of the radio frequency tag control device 60, reference may be made to the related descriptions in fig. 1 to fig. 4, which are not repeated here.
Referring to fig. 7, the embodiment of the present invention further discloses a response device 70, where the response device 70 includes:
the electric quantity detection module 701 is configured to receive a first instruction from the reader, and detect an electric quantity after receiving the first instruction;
an authentication information sending module 702, configured to receive a second instruction from the reader, and send a first response after receiving the second instruction, where the first response includes handshake authentication information;
the power transmission module 703 is configured to receive a third instruction from the reader, and after receiving the third instruction, send a second response in response to the third instruction, where the second response includes identification information of the radio frequency tag and the detected tag power, and the third instruction includes the handshake authentication information;
The power enabling module 704 is configured to receive a fourth instruction from the reader when the tag electric quantity is greater than a preset threshold, and enable the power providing module to perform power supply after receiving the fourth instruction;
the refresh data receiving module 705. To receive refresh data from the reader.
For more details of the working principle and the working manner of the response device 70, reference may be made to the related descriptions in fig. 1 to fig. 4, which are not repeated here.
The embodiment of the invention also discloses a storage medium, on which computer instructions are stored, which when run can execute the steps of the methods shown in fig. 1 to 5. The storage medium may include ROM, RAM, magnetic or optical disks, and the like. The storage medium may also include a non-volatile memory (non-volatile) or a non-transitory memory (non-transitory) or the like.
The embodiment of the invention also discloses a reader, which can comprise a memory and a processor, wherein the memory stores computer instructions capable of running on the processor. The processor, when executing the computer instructions, may perform the steps of the methods shown in fig. 1-4.
The embodiment of the invention also discloses a radio frequency tag, which can comprise a memory and a processor, wherein the memory stores computer instructions capable of running on the processor. The processor, when executing the computer instructions, may perform the steps of the method shown in fig. 5.
Although the present invention is disclosed above, the present invention is not limited thereto. Various changes and modifications may be made by one skilled in the art without departing from the spirit and scope of the invention, and the scope of the invention should be assessed accordingly to that of the appended claims.
Claims (17)
1. A radio frequency tag control method for a reader, comprising:
receiving a to-be-refreshed list, wherein the to-be-refreshed list comprises a plurality of identifiers of radio frequency tags to be refreshed and refresh data corresponding to each radio frequency tag to be refreshed;
transmitting a first instruction to enable a first radio frequency tag receiving the first instruction to detect electric quantity, wherein the first radio frequency tag is the radio frequency tag receiving the first instruction;
transmitting a second instruction to enable a second radio frequency tag receiving the second instruction to transmit a first response, wherein the first response comprises handshake authentication information, and the second radio frequency tag is the radio frequency tag receiving the second instruction;
transmitting a third instruction to enable a third radio frequency tag receiving the third instruction to verify that handshake authentication information included in the third instruction is consistent with handshake authentication information included in the first response, and transmitting a second response, wherein the second response comprises identification information of the radio frequency tag and detected tag electric quantity, and the third radio frequency tag is a radio frequency tag receiving the third instruction and transmitting the second response;
At least when the tag electric quantity is larger than a preset threshold value, a fourth instruction is sent to the third radio frequency tag, so that the third radio frequency tag receiving the fourth instruction enables a power supply module to supply power;
sending refreshing data to the third radio frequency tag;
the sending a fourth instruction to the third radio frequency tag at least when the tag electric quantity is greater than a preset threshold value includes:
and when the tag electric quantity is larger than the preset threshold value and the identifier of the third radio frequency tag is positioned in the list to be refreshed, sending the fourth instruction to the third radio frequency tag.
2. The radio frequency tag control method according to claim 1, wherein the transmitting the second instruction includes:
transmitting a first sub-instruction to enable a second radio frequency tag receiving the first sub-instruction to generate a random number; transmitting a second sub-instruction, so that a second radio frequency tag receiving the second sub-instruction divides the random number by 2;
and sending a third sub-instruction so that the second radio frequency tag receiving the third sub-instruction subtracts one from the random number.
3. The radio frequency tag control method according to claim 2, wherein the third radio frequency tag transmitting a second response in response to the third instruction means transmitting the second response when the random number is 0.
4. The radio frequency tag control method according to claim 1, wherein before the sending the first instruction, further comprises:
transmitting a carrier without signal modulation and maintaining a first preset time period;
after the first instruction is sent, and before the second instruction is sent, the method further comprises the following steps:
transmitting a carrier without signal modulation and maintaining a second preset time period;
after the second instruction is sent, and before the third instruction is sent, the method further comprises:
transmitting a carrier without signal modulation and maintaining a third preset time period;
after the third instruction is sent, and before the fourth instruction is sent, the method further comprises:
and transmitting the carrier without signal modulation and maintaining the fourth preset time period.
5. The radio frequency tag control method according to claim 1, wherein the transmitting refresh data to the third radio frequency tag comprises:
and transmitting the refresh data in a fifth preset time period.
6. The radio frequency tag control method according to claim 1, wherein the transmitting refresh data to the third radio frequency tag comprises:
searching refreshing data corresponding to the third radio frequency tag in the to-be-refreshed list according to the identifier of the third radio frequency tag;
And sending the refresh data corresponding to the third radio frequency tag.
7. The radio frequency tag control method according to claim 6, further comprising:
and if the refresh data corresponding to the third radio frequency tag is successfully sent, removing the identification of the third radio frequency tag from the to-be-refreshed list.
8. The method according to claim 1, wherein the third radio frequency tag transparently transmits the refresh data to a third party device, the third party device receives the refresh data and feeds back a refresh flag level to the third radio frequency tag after the refresh is successful, and the third radio frequency tag carries the refresh flag level in a second response to be sent next time.
9. The radio frequency tag control method according to claim 1, further comprising:
and when the label electric quantity does not reach the preset threshold value, continuing to send the second instruction.
10. The radio frequency tag control method of claim 1, wherein the first instruction, the second instruction, the third instruction, and the fourth instruction are selected from an instruction set in EPC C1G2 protocol, wherein the first instruction, the second instruction, the third instruction, and the fourth instruction are each different instructions in the instruction set.
11. The radio frequency tag control method of claim 10, wherein the instruction set includes a select instruction, a query instruction, a query_adj instruction, a query_rep instruction, and an ACK.
12. A response method for a radio frequency tag, comprising:
receiving a first instruction from a reader, and detecting electric quantity after receiving the first instruction;
receiving a second instruction from the reader, and sending a first response after receiving the second instruction, wherein the first response comprises handshake authentication information;
receiving a third instruction from the reader, verifying that handshake authentication information included in the third instruction is consistent with handshake authentication information included in the first response after the third instruction is received, and sending a second response, wherein the second response comprises identification information of the radio frequency tag and detected tag electric quantity, and the third instruction comprises the handshake authentication information;
if the electric quantity of the tag is larger than a preset threshold value and the identification of the radio frequency tag is located in a to-be-refreshed list, a fourth instruction from the reader is received, and a power supply module is enabled to supply power after the fourth instruction is received, wherein the to-be-refreshed list comprises the identification of a plurality of radio frequency tags to be refreshed and refresh data corresponding to each radio frequency tag to be refreshed;
And receiving refresh data from the reader.
13. A radio frequency tag control apparatus for a reader, comprising:
the module is used for receiving a to-be-refreshed list, and the to-be-refreshed list comprises a plurality of identifiers of radio frequency tags to be refreshed and refresh data corresponding to each radio frequency tag to be refreshed;
the first instruction sending module is used for sending a first instruction so that a first radio frequency tag receiving the first instruction detects electric quantity, wherein the first radio frequency tag is the radio frequency tag receiving the first instruction;
the second instruction sending module is used for sending a second instruction so that a second radio frequency tag receiving the second instruction sends a first response, wherein the first response comprises handshake authentication information, and the second radio frequency tag is a radio frequency tag receiving the second instruction;
a third instruction sending module, configured to send a third instruction, so that a third radio frequency tag that receives the third instruction verifies that handshake authentication information included in the third instruction is consistent with handshake authentication information included in the first response, and sends a second response, where the second response includes identification information of the radio frequency tag and detected tag electric quantity, and the third radio frequency tag receives the third instruction and sends the second response;
The fourth instruction sending module is used for sending a fourth instruction to the third radio frequency tag at least when the tag electric quantity is larger than a preset threshold value, so that the third radio frequency tag receiving the fourth instruction enables the power supply module to supply power;
the refreshing data sending module is used for sending refreshing data to the third radio frequency tag;
the fourth instruction sending module is further configured to send the fourth instruction to the third radio frequency tag when the tag electric quantity is greater than the preset threshold and the identifier of the third radio frequency tag is located in the to-be-refreshed list.
14. A response device for a radio frequency tag, comprising:
the electric quantity detection module is used for receiving a first instruction from the reader and detecting electric quantity after receiving the first instruction;
the authentication information sending module is used for receiving a second instruction from the reader and sending a first response after receiving the second instruction, wherein the first response comprises handshake authentication information;
the electric quantity sending module is used for receiving a third instruction from the reader, verifying that handshake authentication information included in the third instruction is consistent with handshake authentication information included in the first response after receiving the third instruction, and sending a second response, wherein the second response comprises identification information of the radio frequency tag and detected tag electric quantity, and the third instruction comprises the handshake authentication information; the enabling power supply module is used for receiving a fourth instruction from the reader when the electric quantity of the tag is larger than a preset threshold value and the identification of the radio frequency tag is located in a to-be-refreshed list, and enabling the power supply module to supply power after receiving the fourth instruction, wherein the to-be-refreshed list comprises the identification of a plurality of radio frequency tags to be refreshed and refresh data corresponding to each radio frequency tag to be refreshed;
And the refreshing data receiving module is used for receiving refreshing data from the reader.
15. A reader comprising a memory and a processor, the memory having stored thereon computer instructions executable on the processor, wherein the processor, when executing the computer instructions, performs the steps of the radio frequency tag control method of any one of claims 1 to 11.
16. A radio frequency tag comprising a memory and a processor, said memory having stored thereon computer instructions executable on said processor, wherein said processor executes said computer instructions to perform the steps of the response method of claim 12.
17. A storage medium having stored thereon computer instructions which, when executed by a processor, perform the steps of the radio frequency tag control method of any of claims 1 to 11 or the steps of the response method of claim 12.
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| CN201910887805.5A CN112528688B (en) | 2019-09-19 | 2019-09-19 | Radio frequency tag control method, response method and device, storage medium, reader and radio frequency tag |
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| CN114330625B (en) * | 2021-11-18 | 2024-01-23 | 北京智芯微电子科技有限公司 | Passive radio frequency tag verification system and control method thereof |
| CN116227513B (en) * | 2022-12-29 | 2023-10-27 | 深圳市铨顺宏科技有限公司 | Tag communication method, device, equipment and storage medium based on ultrahigh frequency |
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