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CN-121997964-A - Communication method, device and system

CN121997964ACN 121997964 ACN121997964 ACN 121997964ACN-121997964-A

Abstract

A communication method, device and system relates to the communication field, so as to realize the dynamic sending of tag information by a radio frequency identification tag, the method is executed based on the radio frequency identification tag comprising a plurality of capacitors, and the method can comprise the following steps: the radio frequency identification tag comprises a plurality of capacitors, the radio frequency identification tag responds to the received radio frequency energy or environmental energy of a first radio frequency signal, the first capacitor of the plurality of capacitors is charged based on direct current generated by the radio frequency energy or environmental energy conversion of the first radio frequency signal, any capacitor (second capacitor) except the first capacitor of the plurality of capacitors is further charged, the capacitance of the first capacitor supports the radio frequency identification tag to transmit tag information at least once, and the tag information is information stored in the radio frequency identification tag or information obtained through perception. The scheme of the application can be widely applied to the fields of communication technology, artificial intelligence, internet of vehicles, intelligent home networking and the like.

Inventors

  • ZHENG HAINA
  • YAN SHEN

Assignees

  • 华为技术有限公司

Dates

Publication Date
20260508
Application Date
20241107

Claims (20)

  1. 1. A method of communication, characterized in that it is applied to a radio frequency identification tag comprising a plurality of capacitors, said method comprising: In response to receiving radio frequency energy of a first radio frequency signal or environmental energy, charging a first capacitor based on the radio frequency energy of the first radio frequency signal or direct current generated by the environmental energy conversion, wherein the first capacitor is one of the plurality of capacitors, the capacitance of the first capacitor supports the radio frequency identification tag to transmit tag information at least once, and the tag information is information stored in or obtained by sensing the radio frequency identification tag; And charging a second capacitor, wherein the second capacitor is any capacitor except the first capacitor in the plurality of capacitors.
  2. 2. The method of claim 1, wherein the step of determining the position of the substrate comprises, And under the condition that the energy storage energy of the first capacitor is larger than or equal to a first preset threshold value, charging the second capacitor, wherein the energy storage energy corresponding to the first preset threshold value supports the radio frequency identification tag to send the tag information once, or the energy storage energy corresponding to the first preset threshold value is the capacity of the capacitor fully charged by the first capacitor.
  3. 3. A method according to claim 1 or 2, characterized in that, The capacitance of the first capacitor is equal to the capacitance of the second capacitor, or The capacitance of the first capacitor is smaller than that of the second capacitor.
  4. 4. A method according to any one of claim 1 to 3, wherein, The radio frequency identification tag comprises a circuit management module, wherein the circuit management module is used for managing any capacitor in the plurality of capacitors.
  5. 5. The method of claim 4, wherein the circuit management module comprises a first rectifying circuit and a first switching circuit, the first switching circuit comprising a first end and a second end, the first end of the first switching circuit being coupled to the first rectifying circuit, the second end of the first switching circuit being configured to couple to any one of the plurality of capacitors, the second end of the first switching circuit being initially configured to couple to the first capacitor.
  6. 6. The method of claim 5, wherein prior to charging the second capacitor, the method further comprises: the first switch circuit detects that the stored energy of the first capacitor is greater than or equal to the first preset threshold; the first switch circuit switches the second end to be connected with the second capacitor.
  7. 7. The method according to claim 5 or 6, wherein, The charging of the first capacitor includes: the first rectifying circuit converts radio frequency energy of the first radio frequency signal or the environmental energy into direct current and transmits the direct current to the first switching circuit; the first switch circuit receives the direct current, and transmits the direct current to the first capacitor through a first passage, wherein the first passage is a passage between the second end and the first capacitor; The charging of the second capacitor includes: the first rectifying circuit converts radio frequency energy of the first radio frequency signal or the environmental energy into direct current and transmits the direct current to the first switching circuit; The first switch circuit receives the direct current, and transmits the direct current to the second capacitor through a second path, wherein the second path is a path between the second end and the second capacitor.
  8. 8. The method according to any one of claims 5-7, further comprising: the first switching circuit in the rfid tag detects the stored energy of the first capacitor, When the stored energy of the first capacitor is larger than or equal to a second preset threshold value, the radio frequency identification tag uses the stored energy of the first capacitor to send the tag information to a reader; And under the condition that the energy storage energy of the first capacitor is smaller than the second preset threshold value, the radio frequency identification tag sends the tag information to the reader by using the energy storage energy of the second capacitor.
  9. 9. The method according to any one of claims 5-8, further comprising: The second radio frequency signal is used for triggering the transmission of the tag information to a reader, and the reader is used for providing the first radio frequency signal and the second radio frequency signal for the radio frequency identification tag; When the signal intensity of the second radio frequency signal is larger than or equal to a third preset threshold value, the radio frequency identification tag sends the tag information to the reader by using the energy storage energy of the first capacitor; And under the condition that the signal intensity of the second radio frequency signal is smaller than the third preset threshold value, the radio frequency identification tag uses the energy storage energy of the second capacitor to send the tag information to the reader.
  10. 10. The method of claim 9, wherein the step of determining the position of the substrate comprises, The third preset threshold is determined according to the sensitivity of the radio frequency identification tag.
  11. 11. The method according to any one of claims 1-10, further comprising: And receiving a second radio frequency signal from a reader, wherein the second radio frequency signal is used for triggering the transmission of the tag information to the reader, and the reader is used for providing the first radio frequency signal and the second radio frequency signal for the radio frequency identification tag.
  12. 12. The method of claim 11, wherein the method further comprises: and receiving the second radio frequency signal from the reader under the condition that no signal shielding exists between the reader and the radio frequency identification tag.
  13. 13. The method according to claim 11 or 12, characterized in that the method further comprises: The second radio frequency signal is received from the reader without signal reflection between the reader and the radio frequency identification tag.
  14. 14. The method according to any one of claims 11-13, wherein, The second radio frequency signal includes any one of inventory commands, logistics tracking commands, vehicle identification requests, product requests.
  15. 15. The method according to any one of claims 1-14, further comprising: and receiving a confirmation message from the reader, wherein the confirmation message is used for indicating that the reader successfully receives the tag information.
  16. 16. A communication device comprising a radio frequency identification tag, the radio frequency identification tag comprising a first capacitor and a second capacitor; The capacitance of the first capacitor supports the radio frequency identification tag to transmit tag information at least once, wherein the tag information is information stored in the radio frequency identification tag or information obtained through perception; The second capacitor is charged under the condition that the energy storage energy of the first capacitor is larger than or equal to a first preset threshold, wherein the energy storage energy corresponding to the first preset threshold supports the radio frequency identification tag to send tag information once, or the energy storage energy corresponding to the first preset threshold is the capacity of the capacitor fully charged by the first capacitor.
  17. 17. The apparatus of claim 16, wherein the device comprises a plurality of sensors, The capacitance of the first capacitor is equal to the capacitance of the second capacitor, or The capacitance of the first capacitor is smaller than that of the second capacitor.
  18. 18. The apparatus according to claim 16 or 17, wherein, The radio frequency identification tag comprises a circuit management module, wherein the circuit management module is used for managing the first capacitor and the second capacitor.
  19. 19. The apparatus of claim 18, wherein the circuit management module comprises a first rectifying circuit and a first switching circuit, the first switching circuit comprising a first end and a second end, the first end of the first switching circuit coupled to the first rectifying circuit, the second end of the first switching circuit configured to couple to any one of the plurality of capacitors, the second end of the first switching circuit initially configured to couple to the first capacitor.
  20. 20. A communication device comprising a processor for supporting the communication device to perform the method of any of claims 1-15.

Description

Communication method, device and system Technical Field The present application relates to the field of communications, and in particular, to a communication method, device, and system. Background The radio frequency identification system (radio frequency identification, RFID) is typically composed of two parts, a reader and a radio frequency identification tag (RFID tag). The passive radio frequency identification tag can acquire radio frequency signals sent by a reader through a radio frequency energy acquisition rectifying circuit, and converts the acquired radio frequency signals into direct current to provide electric drive for the passive radio frequency identification tag. Further, the source radio frequency identification tag can be added with a power storage mechanism so as to temporarily maintain the operation of the passive radio frequency identification tag when the radio frequency signal is interrupted. Although the passive radio frequency identification tag can be driven by electric power through a radio frequency energy collection method, the efficiency of radio frequency energy collection in the radio frequency energy collection method is limited by the signal intensity of a radio frequency signal from a reader, and under the condition that the signal intensity of the radio frequency signal of the reader is low, the response speed and the reliability of the passive radio frequency identification tag can be greatly reduced. Moreover, the traditional energy storage mechanism is difficult to achieve the balance between the energy storage and the response speed of the passive radio frequency identification tag, so that the radio frequency identification technology cannot be widely used, for example, the passive radio frequency identification tag cannot be used in the scenes of high-frequency inventory, long-distance identification and the like. Therefore, the design of an efficient and flexible energy storage mechanism is a key of the radio frequency identification technology. Disclosure of Invention The embodiment of the application provides a communication method, a communication device and a communication system, which are used for dynamically transmitting tag information of a radio frequency identification tag. In order to achieve the above purpose, the application adopts the following technical scheme: In a first aspect, an embodiment of the present application provides a communication method, where the method may be performed by a radio frequency identification tag including a plurality of capacitors, or may be performed by a component of the radio frequency identification tag including a plurality of capacitors, for example, a processor, a chip, or a chip system of the radio frequency identification tag including a plurality of capacitors, or may be implemented by a logic module or software capable of implementing all or part of a function of the radio frequency identification tag including a plurality of capacitors. The method comprises the steps of responding to the received radio frequency energy or environment energy of a first radio frequency signal, charging a first capacitor based on direct current generated by radio frequency energy or environment energy conversion of the first radio frequency signal, wherein the first capacitor is one of a plurality of capacitors, charging a second capacitor which is any one of the plurality of capacitors except the first capacitor, the capacitance of the first capacitor supports the radio frequency identification tag to transmit tag information at least once, and the tag information is information stored in the radio frequency identification tag or information obtained through sensing. Based on the method of the first aspect, compared with a single-capacitor stored radio frequency energy collection method, the radio frequency identification tag comprising a plurality of capacitors can convert the received radio frequency energy of the first radio frequency signal or the direct current generated by environmental energy, and sequentially charge the plurality of capacitors in the radio frequency identification tag, so that the radio frequency identification tag can flexibly use the capacitor energy storage energy of different capacitors to provide electric drive for self operation under different scenes. In one possible design, when the stored energy of the first capacitor is greater than or equal to a first preset threshold, the second capacitor is charged, and the stored energy corresponding to the first preset threshold supports the radio frequency identification tag to send tag information once, or the stored energy corresponding to the first preset threshold is the capacity of the capacitor where the first capacitor is fully charged. Based on the possible design, the radio frequency identification tag comprises a plurality of capacitors, and the second capacitor is charged under the condition that the energy storage energy of the first capacit