WO2021208104A1

WO2021208104A1 - Information transmission method, electronic tag, terminal device, and storage medium

Info

Publication number: WO2021208104A1
Application number: PCT/CN2020/085443
Authority: WO
Inventors: 邵帅
Original assignee: Oppo广东移动通信有限公司
Priority date: 2020-04-17
Filing date: 2020-04-17
Publication date: 2021-10-21
Also published as: CN115362444A

Abstract

Disclosed in the embodiments of the present application are an information transmission method, an electronic tag, a terminal device, and a storage medium. The method comprises: receiving a continuous wave (CW) signal sent by a terminal device; if the signal strength of the CW signal is greater than a signal strength threshold, then waking up a backscatter modulation module, and using the backscatter modulation module to perform backscatter modulation on the CW signal to obtain Bluetooth broadcast data in response to the CW signal; and sending the Bluetooth broadcast data to the terminal device. By using the described method to implement the scheme, the electronic tag wakes up the backscatter modulation module when the signal strength of the CW signal received by the electronic tag is greater than the signal strength threshold, and the electronic tag uses the backscatter modulation module to perform backscatter modulation on the CW signal to obtain and send the Bluetooth broadcast data to the terminal device, which does not require that the electronic device always call the backscatter modulation module to perform backscatter modulation on the CW signal to obtain and send the Bluetooth broadcast data to the terminal device, thus reducing the power consumption of the electronic tag.

Description

Information transmission method, electronic label, terminal equipment, and storage medium

Technical field

This application relates to the field of communication technology, and in particular to an information transmission method, electronic tags, terminal equipment, and storage media.

Background technique

With the continuous development of communication technology, the use of electronic tags has become more and more widespread.

Nowadays, in the process of widespread use of electronic tags, when the electronic tag receives the carrier information transmitted by the terminal device, the electronic tag transmits the feedback information of the carrier information to the terminal device. If the terminal device has been receiving the carrier information transmitted by the terminal device , The electronic tag is always in the working state, and the feedback information of the carrier information is always transmitted to the terminal device. In this way, the power consumption of the electronic tag has become an urgent problem to be solved at present.

Summary of the invention

The embodiments of the present application expect to provide an information transmission method, an electronic tag, a terminal device, and a storage medium, which can reduce the power consumption of the electronic tag.

The technical solution of this application is realized as follows:

The embodiment of the present application provides an information transmission method, which is applied to an electronic tag, the electronic tag includes a backscatter modulation module, and the method includes:

Receive continuous wave CW signal sent by terminal equipment;

If the signal intensity of the CW signal is greater than the signal intensity threshold, wake up the backscatter modulation module, and use the backscatter modulation module to perform backscatter modulation on the CW signal to obtain a response to the CW signal Bluetooth broadcast data;

Sending the Bluetooth broadcast data to the terminal device.

The embodiment of the present application further provides an information transmission method, which is applied to a terminal device, and the method includes:

Sending a continuous wave CW signal to the electronic tag, and when the signal strength of the CW signal is greater than the signal strength threshold, the CW signal is used to wake up the backscatter modulation module in the electronic tag;

The Bluetooth broadcast data sent by the electronic tag is received through the Bluetooth broadcast channel, and the tag information of the electronic tag is decoded from the Bluetooth broadcast data. The Bluetooth broadcast data is used by the backscatter modulation module to perform the CW signal Backscatter modulation, the data obtained in response to the CW signal.

The embodiment of the present application provides an electronic tag, and the electronic tag includes:

The first Bluetooth antenna is used to receive a continuous wave CW signal sent by a terminal device; send Bluetooth broadcast data to the terminal device;

The backscatter modulation module is used to wake up the backscatter modulation module if the signal intensity of the CW signal is greater than the signal intensity threshold, and use the backscatter modulation module to perform backscatter modulation on the CW signal To obtain the Bluetooth broadcast data in response to the CW signal.

An embodiment of the present application provides a terminal device, and the terminal device includes:

The cellular antenna is used to send a continuous wave CW signal to the electronic tag, and when the signal strength of the CW signal is greater than the signal strength threshold, the CW signal is used to wake up the backscatter modulation module in the electronic tag;

The second Bluetooth antenna is used to receive the Bluetooth broadcast data sent by the electronic tag through the Bluetooth broadcast channel, and decode the tag information of the electronic tag from the Bluetooth broadcast data, and the Bluetooth broadcast data is the backscatter modulation The module performs backscatter modulation on the CW signal to obtain data that responds to the CW signal.

The embodiment of the present application provides a storage medium on which a computer program is stored, which is applied to an electronic tag or a terminal device, and is characterized in that, when the computer program is executed by a processor, the aforementioned application to the electronic tag is implemented Or implement the above-mentioned information transmission method applied to the terminal device.

The embodiment of the application provides an information transmission method and an electronic tag, terminal device, and storage medium, which are applied to an electronic tag, the electronic tag includes a backscatter modulation module, and the information transmission method includes: receiving a continuous wave CW signal sent by a terminal device ; If the signal strength of the CW signal is greater than the signal strength threshold, wake up the backscatter modulation module, and use the backscatter modulation module to backscatter the CW signal to obtain the Bluetooth broadcast data in response to the CW signal; send Bluetooth to the terminal device Broadcast data. With the implementation of the above method, the electronic tag wakes up the backscatter modulation module when the signal strength of the received CW signal is greater than the signal strength threshold, and uses the backscatter modulation module to perform backscatter modulation on the CW signal. Obtaining and sending Bluetooth broadcast data to the terminal device does not require the electronic device to always call the backscatter modulation module to backscatter the CW signal to obtain and send the Bluetooth broadcast data to the terminal device, reducing the power consumption of the electronic tag.

Description of the drawings

FIG. 1 is a schematic structural diagram of an exemplary electronic tag and card reader provided by an embodiment of the application;

FIG. 2 is a channel band distribution diagram of an exemplary Bluetooth broadcast channel provided by an embodiment of the application;

FIG. 3 is a first flowchart of an information transmission method provided by an embodiment of this application;

FIG. 4 is an exemplary schematic diagram of digital signal and analog signal conversion provided by an embodiment of the application;

5 is a schematic diagram 1 of the composition structure of an electronic tag provided by an embodiment of the application;

FIG. 6 is a second flowchart of an information transmission method provided by an embodiment of this application;

FIG. 7 is a schematic diagram 1 of the composition structure of a terminal device provided by an embodiment of this application;

FIG. 8 is a schematic diagram of an exemplary antenna wheel cut provided by an embodiment of the application;

FIG. 9 is a schematic structural diagram of an exemplary electronic tag and terminal device provided by an embodiment of this application;

FIG. 10 is a second schematic diagram of the composition structure of an electronic tag provided by an embodiment of the application;

FIG. 11 is a second schematic diagram of the composition structure of a terminal device according to an embodiment of the application.

Detailed ways

In order to have a more detailed understanding of the characteristics and technical content of the embodiments of the present application, the implementation of the embodiments of the present application will be described in detail below with reference to the accompanying drawings. The attached drawings are for reference and explanation purposes only, and are not used to limit the embodiments of the present application.

Electronic tag tracking technology is a technology that uses radio communication technology to track and locate electronic tags. Nowadays, the widely used electronic tag tracking technology is Ultra High Frequency (UHF) Radio Frequency Identification (RFID). Electronic tag tracking technology includes an electronic tag reader terminal (also called a card reader or terminal device) and an electronic tag to be tracked. The card reader obtains the information of the electronic label through wireless communication with the electronic label, such as the identity document (ID) of the electronic label. The card reader has independent calculation and storage functions. It can obtain the information of the electronic tag, such as the Received Signal Strength Indication (RSSI) information of the electronic tag, and the card reader uses the RSSI information to calculate the electronic tag The location information and store the location information. Electronic tags usually contain tag processing chips and tag antennas. The structure of electronic tags using different wireless transmission protocols is also different. For example, electronic tags using passive RFID technology do not require power supply. Therefore, electronic tags only consist of tag chips and tag antennas. Electronic tags using other wireless technologies also need Microprocessors, power management chips, power supplies and other components.

Electronic tag tracking technology is mainly used for item tracking. In the electronic tag tracking technology, the electronic tag can be placed on the tracked item, and the card reader can track the item by locating the electronic tag. Electronic label technology can be applied to logistics to carry out real-time positioning and tracking of goods. In recent years, consumer-level electronic tags have received widespread attention, and more mature products include Tile Tracker and Estimote.

Among them, the electronic tag tracking technology can be applied to the Internet of Things (IoT) products.

For electronic tags in the consumer market, the problem to be solved urgently is the convenience of electronic tags in use. Among them, it includes the difficulty of obtaining the card reader (whether it needs to be purchased separately) and the service life of the electronic tag. Nowadays, the widely used electronic tag tracking technology mainly includes passive RFID technology and Bluetooth-based electronic tag tracking technology. Among them, passive RFID electronic tags do not require batteries, and the electronic tags can be used all the time, and passive RFID readers require Professional reader card, and the reader card is inconvenient to carry around; the Bluetooth-based electronic tag needs a battery when in use, the service life of the electronic tag is affected by the battery capacity, under normal circumstances, the service life of the electronic tag is 3 In 2009, Bluetooth-based card readers can be smart terminals, and no professional card readers are required.

1. Passive RFID electronic tag tracking technology

The electronic tag of the passive RFID electronic tag tracking technology is an electronic tag that does not require a power source. The electronic tag relies on collecting the radio frequency energy emitted by the reader of the passive RFID electronic tag tracking technology to supply power to the electronic tag. Therefore, the electronic tag only consists of a tag antenna and a tag chip, and does not require a battery. When the electronic tag is not physically damaged, the electronic tag can be used all the time. However, the card reader necessary for the current passive RFID electronic tag tracking technology is still a special device. There is no wireless transmission protocol such as Bluetooth and WIFI, and it cannot be realized by consumer electronic terminals, such as smart phones and tablets. In addition, the card reader in passive RFID electronic tag tracking technology is relatively large and expensive, and is not suitable for consumer-level applications. Therefore, passive RFID electronic tag tracking technology is widely used in enterprises, such as item tracking in logistics.

2. Bluetooth-based electronic tag tracking technology

For Bluetooth-based electronic tag tracking technology, Bluetooth low energy (Bluetooth Low Energy, BLE) technology is mainly used. BLE technology is a low-power application technology in Bluetooth technology. Compared with traditional Bluetooth technology, BLE technology can be used differently. The channel, codec and decoding reduce the power consumption of the chip. However, its use time is still 2-3 years, and its use time is far less than that of passive RFID electronic tag tracking technology electronic tags. BLE technology is widely used in consumer electronic terminals, such as smart phones and tablets. For example, the Find X2 smart phone launched in 2020 has adopted Bluetooth 5.1 technology.

3. Bluetooth-based zero power consumption technology

In the Bluetooth zero-power electronic tag, Bluetooth reception still requires a BLE transmitter/receiver, which increases the power consumption of the electronic tag based on the Bluetooth zero-power technology. The passive collection of radio frequency (RF) energy is adopted, and BLE broadcast information can be transmitted only when the collected energy exceeds the energy requirement of the BLE transmitter. This working mode is not suitable for electronic tag tracking system. The electronic tag tracking system needs a stable and predictable information interaction between the reader and the tag, that is, when the reader needs to communicate with the tag information, as long as the tag is within the reading range, the reader can obtain this Information in the label. The architecture design of the Bluetooth-based zero-power technology relies on the time of energy harvesting, so it cannot provide a stable connection.

In the interactive process of Bluetooth BLE broadcast information implemented by backscatter technology, there are obvious shortcomings for consumer-level applications, such as independent continuous wave (Continuous Wave, CW) signal transmission hardware, which is responsible for transmitting CW signals , CW signal is used for the carrier signal of the backscatter of the electronic tag. Compared with RFID card readers, this kind of hardware system is simpler. However, consumers still need to purchase and carry this hardware, which brings inconvenience to consumers. On the electronic tag, the microprocessor and oscillator in the electronic tag are always working. Although the use of backscattering from the efficiency of transmitting BLE signals saves 5-6 times the energy of traditional BLE transmitters, the electronic tag is always in the active state, and the power consumption in the transmitting state is averaged with the power consumption in the idle state. The power consumption of the electronic tag of the traditional BLE beacon is relatively large.

4. Backscattering technology

Backscatter technology is a wireless technology that realizes signal transmission and coding without a transmitter. Backscatter technology is similar to the principle of radar. Part of the electromagnetic wave will be reflected when the electromagnetic wave hits the surface of the object. The strength of the reflected electromagnetic wave signal depends on the shape, material and distance of the object. From the perspective of the radar, each object has a radar cross section (RCS) . In the backscatter system, the electronic tag realizes the encoding of the reflected signal by changing its RCS. As shown in Figure 1, in an electronic tag, the card reader transmits a CW signal to the electronic tag as a carrier wave. The electronic tag realizes the encoding of the reflected signal by switching the matching impedance frequency of the antenna, and sends Bluetooth broadcast data to the reader, such as passive UHF RFID.

5. Overview of Bluetooth BLE

Bluetooth 4.0 and the newer Bluetooth technology include the function of BLE. BLE technology is used as a beacon, which transmits broadcast signals without actively connecting with the card reader, so that it can be found by the card reader. The power consumption of classic Bluetooth is about 1W, and the power consumption of BLE is 10-500mW.

BLE can be understood as one-way communication, using Gaussian Frequency Shift Keying (GFSK) modulation for one-way communication. BLE is divided into 40 channels, each with a bandwidth of 2MHz. As shown in Figure 2 on the Nth channel of BLE. Fc is the center frequency of the channel. When the frequency is between Fc-1MHz and Fc-185KHz, this signal is defined as "0", when the frequency is between Fc+185KHz and Fc+1MHz, this signal is defined as "1". The channels used to transmit broadcast signals are CH37 (2402MHz), CH38 (2462, 2426MHz), and CH39 (2480MHz).

The problems existing in the above-mentioned technology can be specifically solved by the following embodiments.

Example one

The embodiment of the present application provides an information transmission method, which is applied to electronic tags. FIG. 3 is a flowchart 1 of an information transmission method provided by an embodiment of the application. As shown in FIG. 3, the information transmission method may include:

S100. Receive a continuous wave CW signal sent by a terminal device.

The information transmission method provided in the embodiment of the present application is applicable to a scenario where a terminal device communicates with an electronic tag.

In the embodiment of the present application, the electronic tag may use the first Bluetooth antenna to receive the CW signal transmitted by the terminal device.

In the embodiment of the present application, the electronic tag further includes a rectification module connected to the backscatter modulation module. When the electronic tag receives the continuous wave CW signal sent by the terminal device, the electronic tag transfers the AC energy of the CW signal through the rectification module Converted into DC energy, the electronic tag uses the DC energy as the signal strength of the CW signal.

In the embodiment of this application, the AC energy of the CW signal can be the AC current of the CW signal or the AC voltage of the CW signal. In the case that the electronic tag uses the rectifier module to convert the AC energy of the CW signal into DC energy, the The DC energy of the CW signal is correspondingly converted into a DC voltage or a DC current, which can be specifically determined according to actual conditions, which is not limited in the embodiment of the present application.

In the embodiment of the present application, the CW signal received by the antenna may be an analog signal or a digital signal, and the specific may be determined according to actual conditions, which is not limited in the embodiment of the present application.

In the embodiment of this application, if the CW signal received by the antenna can be an analog signal, the electronic tag can use a rectifier to convert the CW signal in the form of analog signal into a CW signal in the form of digital signal. When the microprocessor obtains the tag information At this time, the electronic tag controls the oscillator to use the tag information to backscatter the CW signal, that is, the tag information is loaded on the CW signal, and the CW signal loaded with the tag information is digital-to-analog converted, so as to obtain the Bluetooth in the form of an analog signal. Broadcast data.

In the embodiment of the present application, the electronic tag includes a rectifier module, the rectifier module may be a rectifier circuit with a rectification function formed by using electronic components, and the rectifier module may also be an electronic product with a rectifier function, which may be specifically based on actual conditions. To make a determination, the embodiment of the present application does not limit this.

In the embodiments of the present application, the electronic tag can configure the signal strength threshold by using a microprocessor, and the electronic tag can also determine the signal strength threshold according to the parameter value of the diode and the parameter value of the capacitor, which can be specifically determined according to the actual situation. The embodiment of the application does not limit this.

In the embodiment of the present application, the rectifier module includes a diode, a capacitor, and a ground point. The electronic tag also includes a signal strength threshold. The electronic tag can determine the signal strength threshold according to the parameter value of the diode and the parameter value of the capacitor.

It should be noted that the parameter value of the diode includes the maximum rectified current value of the diode, the reverse current value, the maximum reverse working voltage, the dynamic resistance value, the maximum operating frequency, etc.; the parameter value of the capacitor includes the capacity value of the capacitor and the resistance of the capacitor Voltage value, leakage current of capacitor, etc.

In the embodiment of the present application, the electronic tag can determine the signal strength threshold according to a parameter value of the diode and a parameter value of the capacitance; the electronic tag can also determine the signal strength according to multiple parameter values of the diode and multiple parameter values of the capacitance Threshold; the electronic tag can also determine the signal strength threshold according to a parameter value of the diode and multiple parameter values of the capacitor; the electronic tag can also determine the signal strength threshold according to multiple parameter values of the diode and a parameter value of the capacitor, the specific It can be determined according to the actual situation, which is not limited in the embodiment of the present application.

In the embodiment of the present application, the electronic tag can also configure the signal intensity threshold through the microprocessor in the scattering modulation module.

It should be noted that the microprocessor can be used to configure the signal strength threshold. The way the electronic tag configures the signal strength threshold can be that the electronic tag receives the information transmitted by other devices to configure the signal strength threshold, and the electronic tag can also use the preset signal strength threshold. The signal strength threshold is configured in a configuration manner, which can be specifically determined according to actual conditions, which is not limited in the embodiment of the present application.

In the embodiment of the present application, the electronic tag includes a first Bluetooth antenna, the electronic tag can receive the CW signal transmitted by the terminal device through the first Bluetooth antenna, and the electronic tag can also use the first Bluetooth antenna to send information to the terminal device.

In the embodiments of this application, the electronic tag can always receive the CW signal sent by the terminal device; the electronic tag can also receive the CW signal sent by the terminal device within a preset time period, which can be determined according to the actual situation. The implementation of this application The example does not limit this.

It should be noted that the preset time period may be 2 s, and the preset time period may also be 50 ms, which can be specifically determined according to actual conditions, which is not limited in the embodiment of the present application.

S300. If the signal strength of the CW signal is greater than the signal strength threshold, wake up the backscatter modulation module, and use the backscatter modulation module to perform backscatter modulation on the CW signal to obtain Bluetooth broadcast data in response to the CW signal.

In the embodiment of this application, after the electronic tag uses the rectifier module to obtain the signal strength of the CW signal, the electronic tag uses the rectifier module to compare the signal strength of the CW signal with the signal strength threshold, and the signal strength of the CW signal is determined on the electronic tag When it is greater than the signal strength threshold, the electronic tag wakes up the backscatter modulation module.

In the embodiment of the present application, the signal strength of the CW signal can be determined based on the voltage of the CW signal; the signal strength of the CW signal can be determined based on the current of the CW signal; the signal strength of the CW signal can also be determined based on the power of the CW signal. The details can be determined according to actual conditions, which are not limited in the embodiments of the present application.

In the embodiments of this application, the tag information can be the location data information of the electronic tag, it can also be the ID data information of the electronic tag, or other data information of the electronic tag. The specific information can be determined according to the actual situation. The implementation of this application The example does not limit this.

In the embodiment of the present application, if the signal intensity of the CW signal is less than the signal intensity threshold, the electronic tag does not wake up the backscatter modulation module, that is, the backscatter modulation module is still in a sleep state.

In the embodiment of the present application, the backscatter modulation module includes a microprocessor and an oscillator connected to the microprocessor, and the electronic tag wakes up the backscatter modulation module, specifically including the electronic tag wakes up the microprocessor, and uses the microprocessor The device wakes up the oscillator.

In the embodiment of the present application, the electronic tag may first wake up the microprocessor, and then use the microprocessor to wake up the oscillator.

In the embodiment of the present application, the electronic tag uses the backscatter modulation module to perform backscatter modulation on the CW signal to obtain the Bluetooth broadcast data in response to the CW signal. Specifically, the electronic tag obtains the CW signal by demodulating the CW signal. According to the request information, the electronic tag searches for the tag information corresponding to the request information, and the electronic tag performs backscatter modulation on the CW signal according to the tag information to obtain Bluetooth broadcast data.

In the embodiment of the present application, the electronic tag can search for the tag information corresponding to the request information from the microprocessor, and the electronic tag can also search for the tag information corresponding to the request information from the memory. The specific information can be determined according to the actual situation. The application embodiment does not limit this.

It should be noted that the request information is carried in the CW signal. The request information can be the location information of the requested electronic tag. The request information can also be the information requesting the ID of the electronic tag. The specific information can be determined according to the actual situation. The embodiment does not limit this.

In the embodiment of this application, the way for the electronic tag to identify the request information carried in the CW signal can be that the electronic tag obtains the request information by demodulating the CW signal, which can be specifically determined according to the actual situation. There is no restriction on this.

In the embodiment of the present application, after the electronic tag uses the microprocessor to identify the request information carried in the CW signal, the electronic tag searches the microprocessor for the tag information corresponding to the request information.

In the embodiment of the present application, the backscatter modulation module further includes: a FET switch connected to the oscillator. The electronic tag performs backscatter modulation on the CW signal according to the tag information to obtain Bluetooth broadcast data. The process includes: The tag information undergoes digital-to-analog conversion to obtain an analog signal corresponding to the tag information, and the electronic tag controls the FET switch to adjust the impedance matching of the first Bluetooth antenna according to the analog signal to obtain Bluetooth broadcast data.

It should be noted that the FET switch can switch the first Bluetooth antenna between grounded and ungrounded states. The electronic tag adjusts the impedance matching of the first Bluetooth antenna by using an analog signal to control the FET switch to adjust the state when the first Bluetooth antenna is grounded and when the first Bluetooth antenna is not grounded to obtain Bluetooth broadcast data.

In the embodiment of the present application, the microprocessor controls the oscillator to oscillate at different frequencies by changing the oscillation frequency of the oscillator, so as to realize the conversion of a digital signal into an analog signal.

In the embodiment of the present application, the process of obtaining an analog signal corresponding to the tag information by performing digital-to-analog conversion on the tag information for the electronic tag specifically includes: sequentially generating the frequency sequence corresponding to the digital signal of the tag information to obtain the analog signal.

It should be noted that the frequency sequence includes a first frequency corresponding to a 0 digital signal and a second frequency corresponding to a 1 data signal.

In the embodiment of the present application, when the digital signal of the frequency sequence is 0, the controller controls the oscillator to oscillate at the first frequency, and when the digital signal of the frequency sequence is 1, the controller controls the oscillation The electronic tag oscillates at the second frequency. The electronic tag oscillates according to the frequency sequence corresponding to the digital signal of the tag information by invoking the microprocessor and using the oscillator, so that the electronic tag obtains the analog signal including the first frequency and the second frequency. .

Exemplarily, as shown in FIG. 4, the digital signals are all signal sequences of digital signals obtained by arranging the 0 and 1 signals according to a time length of T period, wherein the 0 in the digital signal corresponds to the first frequency, and the digital signal 1 corresponds to the second frequency, the first frequency in Fig. 4 is f _c2 , _{the cosine signal corresponding to f c2} can be expressed as cos(2πf _c2 t), the second frequency in Fig. 4 is f _c1 , and the cosine corresponding to _{f c1} signal can be expressed as cos (2πf _c1 t), a first and a second frequency f _c2 frequency f _c1 sorted by signal sequences of digital signals, to obtain a serial digital signal corresponding to the frequency, i.e., to obtain a f _c1 and f _c2 Represents the analog signal.

In the embodiment of the present application, the lower limit value of the frequency difference between the first frequency and the second frequency is 370KHZ; the upper limit value of the frequency difference between the first frequency and the second frequency is 2MHZ.

In the embodiment of the present application, the frequency difference between the first frequency and the second frequency is specifically the absolute value of the difference between the first frequency and the second frequency.

Exemplarily, formula (1) can be used to express:

370KHz<|f ₁ -f ₂ |<2MHz (1)

In the embodiment of the present application, f ₁ is the first frequency, f ₂ is the second frequency, and the first frequency and the second frequency are used to generate a 0 signal and a 1 signal.

In the embodiment of the present application, the electronic tag controls the oscillator to convert the digital signal of the tag information into the analog signal of the tag information, and then the electronic tag uses the analog signal of the tag information to control the FET switch to change the impedance matching of the first Bluetooth antenna to obtain Bluetooth broadcast data.

It should be noted that the electronic tag changes the impedance matching of the first Bluetooth antenna by controlling the switching frequency of the FET switch, thereby loading the analog signal on the CW signal, and obtaining the Bluetooth broadcast data.

Exemplarily, as shown in FIG. 5, the electronic tag includes an antenna, a rectifier module, a microprocessor, an oscillator, a FET switch, a power management circuit, and a power supply. The rectifier module includes a diode, a capacitor, and a ground point, and the antenna is specifically the first Bluetooth antenna. The power supply provides electrical energy for the electronic tag. The power management circuit is used to convert the electrical energy in the power supply into voltage or current to supply power to other modules in the electronic tag. The antenna is used to receive the CW signal sent by the terminal device, and the rectifier module is used for the CW. The signal strength of the signal is judged. When the signal strength of the CW signal is greater than the signal strength threshold, the microprocessor is awakened, and the microprocessor recognizes the request information carried in the CW signal, and searches for the label information corresponding to the request information. The device wakes up the oscillator and controls the oscillator to convert the digital signal of the tag information into the analog signal of the tag information. The electronic tag uses the analog signal of the tag information to control the FET switch to change the impedance matching of the first Bluetooth antenna to obtain the Bluetooth broadcast data and pass The first antenna sends Bluetooth broadcast data to the terminal device.

In the embodiment of this application, the power consumption of the oscillator in the electronic tag depends on the oscillation frequency of the oscillator. In order to reduce the power consumption of the electronic tag in this application, the oscillator in this application is an oscillation with a lower oscillation frequency. Device.

S500: Send Bluetooth broadcast data to the terminal device.

In the embodiment of the present application, when the electronic tag obtains Bluetooth broadcast data, the electronic tag sends the Bluetooth broadcast data to the terminal device.

It should be noted that the Bluetooth broadcast data includes the tag information of the electronic tag. The electronic tag transmits the tag information to the terminal device by carrying the tag information in the Bluetooth broadcast data, so that the terminal device, when the Bluetooth broadcast data is obtained, The terminal device can obtain the tag information of the electronic tag from the Bluetooth broadcast data by decoding the Bluetooth broadcast data.

In the embodiment of the present application, the electronic tag includes a first Bluetooth antenna, and the electronic tag can send Bluetooth broadcast data to the terminal device through the first Bluetooth antenna.

It is understandable that when the signal strength of the CW signal received by the electronic tag is greater than the signal strength threshold, the electronic tag wakes up the backscatter modulation module, and uses the backscatter modulation module to backscatter the CW signal to obtain And send Bluetooth broadcast data to the terminal device, without the need for the electronic device to always call the backscatter modulation module to perform backscatter modulation on the CW signal, obtain and send the Bluetooth broadcast data to the terminal device, reducing the power consumption of the electronic tag.

Example two

The embodiment of the application provides an information transmission method, which is applied to terminal equipment. FIG. 6 is a second flowchart of an information transmission method provided by an embodiment of the application. As shown in FIG. 6, the information transmission method may include:

S200: Send a continuous wave CW signal to the electronic tag, and when the signal strength of the CW signal is greater than the signal strength threshold, the CW signal is used to wake up the backscatter modulation module in the electronic tag.

In the embodiments of the present application, the terminal device may be implemented in various forms. For example, the terminal devices described in this application may include smart phones, tablet computers, notebook computers, palmtop computers, personal digital assistants (Personal Digital Assistant, PDA), portable media players (Portable Media Player, PMP), navigation devices, etc. , Wearable devices, smart bracelets, pedometers and other devices, as well as devices such as digital TVs, desktop computers and other devices.

In the embodiment of this application, the terminal device can always broadcast the CW signal to the electronic tag after the terminal device is started. The terminal device can also broadcast the CW signal to the electronic tag when receiving the tracking instruction of the electronic tag. Broadcasting the CW signal to the electronic tag within a preset time period can be specifically determined according to the actual situation, which is not limited in the embodiment of the present application.

Exemplarily, the frequency of the CW signal may be 2496 MHz, and the frequency of the CW signal may be 2350-2395 MHz, which can be specifically determined according to actual conditions, which is not limited in the embodiment of the present application.

In the embodiment of the present application, the terminal device includes a cellular antenna, and the terminal device transmits a CW signal through the cellular antenna.

In the embodiment of the present application, as shown in FIG. 7, the terminal device includes a processor, a cellular radio frequency module, and a Bluetooth transceiver module. The processor controls the cellular radio frequency module and the Bluetooth transceiver module to implement communication with the electronic tag. . The cellular radio frequency module includes a modem for cellular network information transmission, a cellular radio frequency front end and a cellular antenna. The cellular radio frequency module realizes the transmission of CW signal through the modem, the cellular radio frequency front end and the cellular antenna. Among them, the modem is used to modulate the CW signal, the cellular radio frequency front end is used to preprocess the CW signal, and the cellular antenna is used to transmit the CW signal. The Bluetooth transceiver module includes a Bluetooth transceiver, a Bluetooth modem and a Bluetooth antenna. The Bluetooth transceiver module realizes the transmission of Bluetooth broadcast data through a Bluetooth transceiver, a Bluetooth modem and a Bluetooth antenna. Among them, the Bluetooth antenna and the Bluetooth transceiver are used to receive Bluetooth broadcast data, and the Bluetooth modem is used to demodulate the Bluetooth broadcast data.

It is understandable that when the terminal device is a smart phone, since the smart phone is equipped with a cellular radio frequency module and a Bluetooth transceiver module, the electronic tag can directly use the cellular radio frequency module and the Bluetooth transceiver module in the smart phone. To realize the information transmission with the electronic tag, there is no need to add new hardware to the smart phone, and the smart phone can be directly used to communicate with the electronic tag, which improves the convenience of using the electronic tag.

It should be noted that the preprocessing can be a processing method for power amplification of the CW signal, or a filter processing method for the CW signal, and the preprocessing can also be other processing methods. The specific can be determined according to the actual situation. The application embodiment does not limit this.

In the embodiment of the present application, the terminal device includes multiple cellular antennas, and the terminal device transmits the CW signal by performing antenna wheel switching on the multiple cellular antennas.

In the embodiment of the present application, the cellular radio module supports 1T4R or 2T4R antenna wheel cut, and the terminal can switch the antenna that transmits CW signals to any antenna that supports the CW signal frequency band through the antenna wheel cut.

In the embodiment of the present application, the 5G NR network is supported and the 5G frequency band is the signal of the n40 frequency band, which can realize the data transmission and reception of 4 antennas. The terminal device can alternately transmit the CW signal on the 4 antennas.

As shown in FIG. 8, the terminal equipment includes an AP1 cellular antenna, an AP2 cellular antenna, an AP3 cellular antenna, and an AP4 cellular antenna. The terminal equipment can transmit CW signals by performing round-switching on the four cellular antennas. The way the terminal device performs the round-cutting of the four cellular antennas can be that the terminal device uses the preset cellular antenna transmission sequence to sequentially send the CW signal for the preset time period on each cellular antenna. Exemplarily, the preset cellular antenna transmission sequence may be AP1 cellular antenna, AP2 cellular antenna, AP3 cellular antenna, and AP4 cellular antenna, and the preset time period may be 2s, then the terminal device uses the AP1 cellular antenna to send the CW signal after 2s The terminal equipment then uses the AP2 cellular antenna to send the CW signal for 2s, and then the terminal equipment uses the AP3 cellular antenna to send the CW signal for 2s, and then the terminal equipment uses the AP4 cellular antenna to send the CW signal for 2s, and the terminal equipment follows the preset cellular antenna transmission sequence , Perform round-cutting of each cellular antenna to send CW signals until the end of the transmission.

It is understandable that the terminal device sends CW signals by collecting multiple cellular antennas and performing antenna wheel cutting, which increases the diversity when the terminal sends CW signals and improves the information transmission capability of the terminal device.

In the embodiment of the present application, the terminal device supports a 4G Long Term Evolution (LTE) type network and/or a 5G New Radio (NR) type network.

In the embodiment of the present application, the terminal device determines the frequency of the CW signal and the Bluetooth broadcast channel according to the network supported by the terminal device.

In the embodiment of this application, the Bluetooth broadcast channels CN37, CN38, and CN39. In 4G networks, the B40 frequency band corresponds to the Bluetooth broadcast channel CN37, the B41 frequency band corresponds to the Bluetooth broadcast channel CN39, and in the 5G network, the n40 frequency band corresponds to the Bluetooth broadcast channel. Channel CN37, the Bluetooth broadcast channel CN39 corresponding to the n41 frequency band.

In the embodiment of the present application, in order to reduce the power consumption of the electronic tag, the frequency at which the terminal device sends the CW signal needs to be accurately selected. If the 4G network of the terminal device is within the B40 frequency band, the frequency of the CW signal determined by the terminal device is (2400-f ₀ ) MHz, and the range of the _{first frequency f 1} _{is (f 0} +1) MHz<f ₁ <( f ₀ +2-0.185)MHz, the range of the _{second frequency f 2} _{is (f 0} +2+0.185)MHz<f ₂ <(f ₀ +3)MHz, and the Bluetooth broadcast channel is CN37; if the terminal device has a 4G network In the B41 frequency band, the frequency of the CW signal determined by the terminal equipment is 2496MHz, _{the range of the first frequency f 1} is (16+0.185)MHz<f ₁ <17MHz, and the range of the _{second frequency f 2} _{is 15MHz<f 2} <(16-0.185)MHz, the Bluetooth broadcast channel is CN39.

In the embodiment of this application, if the 5G network of the terminal device is in the n40 frequency band, the frequency of the CW signal determined by the terminal device is (2400-f ₀ ) MHz, and the range of the _{first frequency f 1} _{is (f 0} +1 )MHz<f ₁ <(f ₀ +2-0.185)MHz, the range of the _{second frequency f 2} _{is (f 0} +2+0.185)MHz<f ₂ <(f ₀ +3)MHz, and the Bluetooth broadcast channel is CN37 ; If the 5G network of the terminal device is in the n41 frequency band, the frequency of the CW signal determined by the terminal device is 2496MHz, _{the range of the first frequency f 1} is (16+0.185)MHz<f ₁ <17MHz, and the second frequency f ₂ The range is 15MHz<f ₂ <(16-0.185)MHz, and the Bluetooth broadcast channel is CN39.

In the present application embodiment, the frequency range f ₀ is 5MHz <f ₀ <50MHz.

S400. Receive the Bluetooth broadcast data sent by the electronic tag through the Bluetooth broadcast channel, and decode the tag information of the electronic tag from the Bluetooth broadcast data. The Bluetooth broadcast data is the response obtained by backscattering the CW signal by the backscatter modulation module. CW signal data.

In the embodiment of this application, the terminal device can transmit Bluetooth broadcast data on the CN37 Bluetooth broadcast channel, the terminal device can also transmit Bluetooth broadcast data on the CN38 Bluetooth broadcast channel, and the terminal device can also transmit Bluetooth broadcast data on the CN39 Bluetooth broadcast channel The terminal device can also transmit Bluetooth broadcast data on at least two channels of CN37, CN38, and CN39, and the specifics can be determined according to actual conditions, which are not limited in the embodiment of this application.

In the embodiment of the present application, the terminal device receives the Bluetooth broadcast data in response to the CW signal from the electronic tag, and determines the tag information of the electronic tag from the Bluetooth broadcast data, including the terminal device decoding the Bluetooth broadcast data to obtain the decoded data Bluetooth broadcast data.

In the embodiment of the present application, the terminal device decodes the Bluetooth broadcast data, and after obtaining the decoded Bluetooth broadcast data, the terminal device obtains the tag information of the electronic tag from the decoded Bluetooth broadcast data.

In the embodiment of the present application, the terminal device further includes a second Bluetooth antenna, and the terminal device receives the Bluetooth broadcast data transmitted in the Bluetooth broadcast channel through the second Bluetooth antenna.

Exemplarily, as shown in Figure 9, the terminal device broadcasts the CW signal to the electronic tag. When the electronic tag determines that the signal strength of the CW signal is greater than the signal strength threshold, the electronic tag wakes up the backscatter modulation module and uses the reverse The scattering modulation module performs backscatter modulation on the CW signal to obtain Bluetooth broadcast data in response to the CW signal; and sends the Bluetooth broadcast data to the terminal device.

It is understandable that the terminal device sends a CW signal to the electronic tag for the electronic tag to determine the signal strength of the CW signal. If the signal strength of the CW signal is greater than the signal strength threshold, the electronic tag wakes up the backscatter modulation module , And use the backscatter modulation module to backscatter the CW signal to obtain and send Bluetooth broadcast data to the terminal device, without the need for electronic equipment to always call the backscatter modulation module to perform backscatter modulation on the CW signal, and get the The terminal device sends the Bluetooth broadcast data, which reduces the power consumption of the electronic tag.

Example three

Based on the same inventive concept of the first embodiment, the embodiment of the present application provides an electronic label 1, which corresponds to an information transmission method applied to the electronic label; FIG. 10 is a composition structure of an electronic label provided by an embodiment of the application In schematic diagram 2, the electronic label 1 may include:

The first Bluetooth antenna 11 is used for receiving a continuous wave CW signal sent by a terminal device; sending Bluetooth broadcast data to the terminal device;

The backscatter modulation module 12 is configured to, if the signal intensity of the CW signal is greater than the signal intensity threshold, wake up the backscatter modulation module, and use the backscatter modulation module to backscatter the CW signal Modulate to obtain the Bluetooth broadcast data in response to the CW signal.

In some embodiments of the present application, the backscatter modulation module 12 includes a microprocessor and an oscillator connected to the microprocessor;

The backscatter modulation module 12 is used to wake up the microprocessor, and use the microprocessor to wake up the oscillator.

In some embodiments of the present application, the backscatter modulation module 12 is configured to obtain the request information in the CW signal by demodulating the CW signal; according to the request information, find the corresponding request information The tag information; according to the tag information, the CW signal is backscattered and modulated to obtain the Bluetooth broadcast data.

In some embodiments of the present application, the backscatter modulation module further includes: an FET switch connected to the oscillator;

The backscatter modulation module 12 is configured to obtain an analog signal corresponding to the tag information by performing digital-to-analog conversion on the tag information; control the FET switch to adjust the impedance matching of the first Bluetooth antenna according to the analog signal , To obtain the Bluetooth broadcast data.

In some embodiments of the present application, the backscatter modulation module 12 is configured to sequentially generate the frequency sequence corresponding to the tag information to obtain the analog signal, and the frequency sequence includes the first digital signal corresponding to 0. The second frequency corresponding to the frequency and 1 data signal.

In some embodiments of the present application, the lower limit of the frequency difference between the first frequency and the second frequency is 370KHZ; the upper limit of the frequency difference between the first frequency and the second frequency is The limit is 2MHZ.

In some embodiments of the present application, the electronic tag further includes a rectification module connected to the backscatter modulation module, and the rectification module is configured to convert the AC energy of the CW signal into DC energy; use the DC energy as the signal strength of the CW signal.

In some embodiments of the present application, the rectifier module further includes a diode and a capacitor, wherein the method further includes:

The microprocessor is configured to determine the signal strength threshold value according to the parameter value of the diode and the parameter value of the capacitance.

In some embodiments of the present application, the signal intensity threshold is configured by a microprocessor in the backscatter modulation module.

It should be noted that in practical applications, the above-mentioned first Bluetooth antenna 11 and backscatter modulation module 12 can be implemented by a microprocessor on the electronic tag 1, specifically a CPU (Central Processing Unit), MPU (Microprocessor) Unit, microprocessor), DSP (Digital Signal Processing, digital signal processor) or Field Programmable Gate Array (FPGA, Field Programmable Gate Array), etc.; the above-mentioned data storage can be realized by the memory on the electronic tag 1.

In practical applications, the above-mentioned memory may be a volatile memory (volatile memory), such as a random-access memory (Random-Access Memory, RAM); or a non-volatile memory (non-volatile memory), such as a read-only memory ( Read-Only Memory (ROM), flash memory (flash memory), hard disk (Hard Disk Drive, HDD) or solid-state drive (Solid-State Drive, SSD); or a combination of the above types of memory, and provide it to the microprocessor Instructions and data.

The embodiment of the present application provides a computer-readable storage medium having a computer program thereon, and when the program is executed by a microprocessor, the above-mentioned information transmission method applied to an electronic tag is realized.

Example four

Based on the same inventive concept of the second embodiment, the embodiment of the application provides a terminal device 2 corresponding to an information transmission method applied to the terminal device; FIG. 11 is a composition structure of a terminal device provided by an embodiment of the application In schematic diagram 2, the terminal device 2 may include:

The cellular antenna 21 is used to send a continuous wave CW signal to the electronic tag, and when the signal strength of the CW signal is greater than the signal strength threshold, the CW signal is used to wake up the backscatter modulation module in the electronic tag;

The second Bluetooth antenna 22 is used to receive the Bluetooth broadcast data sent by the electronic tag through the Bluetooth broadcast channel, and decode the tag information of the electronic tag from the Bluetooth broadcast data, and the Bluetooth broadcast data is the backscatter The modulation module performs backscatter modulation on the CW signal to obtain data that responds to the CW signal.

In some embodiments of the present application, the cellular antenna 21 is used to transmit the CW signal.

In some embodiments of the present application, the terminal device includes multiple cellular antennas;

The multiple cellular antennas are used to transmit the CW signal in turn.

In some embodiments of the present application, the second Bluetooth antenna 22 is used to receive the Bluetooth broadcast data transmitted in the Bluetooth broadcast channel.

In some embodiments of the present application, the terminal device supports a 4G long-term evolution LTE type network and/or a 5G new air interface NR type network.

In some embodiments of the present application, the processor is configured to determine the frequency of the CW signal and the Bluetooth broadcast channel according to the network supported by the terminal device.

It should be noted that in practical applications, the aforementioned cellular antenna 21 and the second Bluetooth antenna 22 can be implemented by a processor on the terminal device 2, specifically a CPU (Central Processing Unit), MPU (Microprocessor Unit, micro-processing unit). DSP (Digital Signal Processing, Digital Signal Processor), Field Programmable Gate Array (FPGA, Field Programmable Gate Array), etc.; the above-mentioned data storage can be realized by the memory on the terminal device 2.

In practical applications, the above-mentioned memory may be a volatile memory (volatile memory), such as a random-access memory (Random-Access Memory, RAM); or a non-volatile memory (non-volatile memory), such as a read-only memory ( Read-Only Memory, ROM), Flash memory, Hard Disk Drive (HDD) or Solid-State Drive (SSD); or a combination of the above types of memory, and provide instructions to the processor And data.

The embodiment of the present application provides a computer-readable storage medium having a computer program thereon, and when the program is executed by a processor, the above-mentioned information transmission method applied to a terminal device is implemented.

Those skilled in the art should understand that the embodiments of the present application can be provided as methods, systems, or computer program products. Therefore, this application may adopt the form of hardware embodiments, software embodiments, or embodiments combining software and hardware. Moreover, this application may adopt the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, optical storage, etc.) containing computer-usable program codes.

This application is described with reference to flowcharts and/or block diagrams of methods, devices (systems), and computer program products according to embodiments of this application. It should be understood that each process and/or block in the flowchart and/or block diagram, and the combination of processes and/or blocks in the flowchart and/or block diagram can be realized by computer program instructions. These computer program instructions can be provided to the processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing equipment to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing equipment are used to generate It is a device that realizes the functions specified in one process or multiple processes in the flowchart and/or one block or multiple blocks in the block diagram.

These computer program instructions can also be stored in a computer-readable memory that can guide a computer or other programmable data processing equipment to work in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture including the instruction device. The device implements the functions specified in one process or multiple processes in the flowchart and/or one block or multiple blocks in the block diagram.

These computer program instructions can also be loaded on a computer or other programmable data processing equipment, so that a series of operation steps are executed on the computer or other programmable equipment to produce computer-implemented processing, so as to execute on the computer or other programmable equipment. The instructions provide steps for implementing the functions specified in one process or multiple processes in the flowchart and/or one block or multiple blocks in the block diagram.

The above are only preferred embodiments of the present application, and are not used to limit the protection scope of the present application.

Industrial applicability

The embodiments of this application provide an information transmission method, electronic tags, terminal equipment, and storage media. Using the information transmission scheme in this application, the electronic tag receives a CW signal with a signal strength greater than the signal strength threshold. Then the backscatter modulation module is awakened, and the CW signal is backscattered and modulated by the backscatter modulation module to obtain and send Bluetooth broadcast data to the terminal device. There is no need for electronic equipment to always call the backscatter modulation module to reverse the CW signal. To obtain and send the bluetooth broadcast data to the terminal device, the power consumption of the electronic tag is reduced.

Claims

An information transmission method is applied to an electronic tag, the electronic tag includes a backscatter modulation module, and the method includes:

Receive continuous wave CW signal sent by terminal equipment;

If the signal intensity of the CW signal is greater than the signal intensity threshold, wake up the backscatter modulation module, and use the backscatter modulation module to perform backscatter modulation on the CW signal to obtain a response to the CW signal Bluetooth broadcast data;

Sending the Bluetooth broadcast data to the terminal device.
The method according to claim 1, wherein the backscatter modulation module includes a microprocessor and an oscillator connected to the microprocessor, and the waking up the backscatter modulation module includes:

The microprocessor is awakened, and the oscillator is awakened by the microprocessor.
The method according to claim 2, wherein said using said backscatter modulation module to perform backscatter modulation on said CW signal to obtain Bluetooth broadcast data in response to said CW signal comprises:

Obtaining request information in the CW signal by demodulating the CW signal;

Searching for label information corresponding to the request information according to the request information;

Perform backscatter modulation on the CW signal according to the tag information to obtain the Bluetooth broadcast data.
The method according to claim 3, wherein the backscatter modulation module further comprises: a FET switch connected to the oscillator, and the CW signal is backscattered and modulated according to the tag information to obtain The Bluetooth broadcast data includes:

Obtaining an analog signal corresponding to the tag information by performing digital-to-analog conversion on the tag information;

According to the analog signal, the FET switch is controlled to adjust the impedance matching of the first Bluetooth antenna to obtain the Bluetooth broadcast data.
The method according to claim 4, wherein said obtaining the analog signal corresponding to the label information by performing digital-to-analog conversion on the label information comprises:

The analog signal is obtained by sequentially generating the frequency sequence corresponding to the tag information, and the frequency sequence includes a first frequency corresponding to a 0 digital signal and a second frequency corresponding to a 1 data signal.
The method according to claim 5, wherein the method further comprises:

The lower limit of the frequency difference between the first frequency and the second frequency is 370KHZ;

The upper limit of the frequency difference between the first frequency and the second frequency is 2 MHz.
The method according to claim 1, wherein the electronic tag further comprises a rectification module connected to the backscatter modulation module, and the method further comprises:

Converting the AC energy of the CW signal into DC energy through the rectifier module;

The direct current energy is used as the signal strength of the CW signal.
The method according to claim 1, wherein the rectification module further comprises a diode and a capacitor, wherein the method further comprises:

The signal strength threshold is determined according to the parameter value of the diode and the parameter value of the capacitor.
The method according to claim 1, wherein the method further comprises:

The signal intensity threshold is configured by the microprocessor in the backscatter modulation module.
An information transmission method, applied to a terminal device, the method including:

Sending a continuous wave CW signal to the electronic tag, and when the signal strength of the CW signal is greater than the signal strength threshold, the CW signal is used to wake up the backscatter modulation module in the electronic tag;

The Bluetooth broadcast data sent by the electronic tag is received through the Bluetooth broadcast channel, and the tag information of the electronic tag is decoded from the Bluetooth broadcast data. The Bluetooth broadcast data is used by the backscatter modulation module to perform the CW signal Backscatter modulation, the data obtained in response to the CW signal.
The method according to claim 10, wherein the method further comprises:

The CW signal is transmitted through the cellular antenna.
The method according to claim 10, wherein the terminal device includes a plurality of cellular antennas, and the method further comprises:

The CW signal is transmitted by performing antenna wheel switching on the multiple cellular antennas.
The method according to claim 10, wherein the terminal device comprises a second Bluetooth antenna, and the method further comprises:

Receiving the Bluetooth broadcast data transmitted in the Bluetooth broadcast channel through the second Bluetooth antenna.
The method according to any one of claims 10-13, wherein the method further comprises:

The terminal equipment supports a 4G long-term evolution LTE network and/or a 5G new air interface NR network.
The method according to claim 14, wherein the method further comprises:

Determine the frequency of the CW signal and the Bluetooth broadcast channel according to the network supported by the terminal device.
An electronic tag, the electronic tag comprising:

The first Bluetooth antenna is used to receive a continuous wave CW signal sent by a terminal device; send Bluetooth broadcast data to the terminal device;

The backscatter modulation module is used to wake up the backscatter modulation module if the signal intensity of the CW signal is greater than the signal intensity threshold, and use the backscatter modulation module to perform backscatter modulation on the CW signal To obtain the Bluetooth broadcast data in response to the CW signal.
A terminal device, the terminal device includes:

The cellular antenna is used to send a continuous wave CW signal to the electronic tag, and when the signal strength of the CW signal is greater than the signal strength threshold, the CW signal is used to wake up the backscatter modulation module in the electronic tag;

The second Bluetooth antenna is used to receive the Bluetooth broadcast data sent by the electronic tag through the Bluetooth broadcast channel, and decode the tag information of the electronic tag from the Bluetooth broadcast data, and the Bluetooth broadcast data is the backscatter modulation The module performs backscatter modulation on the CW signal to obtain data that responds to the CW signal.
A storage medium on which a computer program is stored, applied to an electronic tag or terminal device, and when the computer program is executed by a processor, the method according to any one of claims 1 to 9 or any one of claims 10 to 15 is implemented .