A transmission method, electronic device and storage medium based on backscattering

Abstract

This application discloses a backscatter-based transmission method, comprising: a first device receiving a backscatter signal corresponding to a probe signal transmitted by a second device at a first frequency; the backscatter signal including information indicating insufficient energy for a third device or information acquired by the third device. This application also discloses another backscatter-based transmission method, device, and storage medium.

Description

Technical Field

[0001] The present application relates to the field of wireless communication technology, and in particular to a backscatter-based transmission method, electronic device, and storage medium. Background Art

[0002] In the related art, when transmitting information based on backscattering, how to effectively transmit information while simplifying the structure of the receiver has not yet been clarified. Summary of the Invention

[0003] To solve the above technical problems, the embodiments of the present application provide a backscatter-based transmission method, electronic device, and storage medium, which can effectively transmit information while simplifying the structure of the receiver.

[0004] In a first aspect, an embodiment of the present application provides a backscatter-based transmission method, comprising: a first device receives a backscatter signal, wherein the backscatter signal corresponds to a detection signal transmitted by a second device at a first frequency; the backscatter signal includes indication information indicating that a third device has insufficient energy or information obtained by the third device.

[0005] In second aspect, an embodiment of the present application provides a backscatter-based transmission method, including: a second device transmits a detection signal at a first frequency, and a backscatter signal corresponding to the detection signal is received by the first device; the backscatter signal includes indication information indicating that the third device has insufficient energy or information obtained by the third device.

[0006] In a third aspect, an embodiment of the present application provides a first device, comprising: a first receiving unit configured to receive a backscatter signal, wherein the backscatter signal corresponds to a detection signal transmitted by a second device at a first frequency; the backscatter signal includes indication information indicating that the third device has insufficient energy or information obtained by the third device.

[0007] In fourth aspect, an embodiment of the present application provides a second device, which includes: a second sending unit, configured to transmit a detection signal at a first frequency, and a backscattered signal corresponding to the detection signal is received by the first device; the backscattered signal includes indication information indicating that the third device has insufficient energy or information obtained by the third device.

[0008] In a fifth aspect, an embodiment of the present application provides a first device, comprising a processor and a memory for storing a computer program that can be run on the processor, wherein the processor, when running the computer program, executes the steps of the backscatter-based transmission method performed by the above-mentioned first device.

[0009] In a sixth aspect, an embodiment of the present application provides a second device, comprising a processor and a memory for storing a computer program that can be run on the processor, wherein the processor, when running the computer program, executes the steps of the backscatter-based transmission method performed by the above-mentioned second device.

[0010] In a seventh aspect, an embodiment of the present application provides a chip, comprising: a processor, configured to call and run a computer program from a memory, so that a device equipped with the chip executes the backscatter-based transmission method executed by the above-mentioned first device.

[0011] In an eighth aspect, an embodiment of the present application provides a chip, comprising: a processor, configured to call and run a computer program from a memory, so that a device equipped with the chip executes the backscatter-based transmission method executed by the above-mentioned second device.

[0012] In a ninth aspect, an embodiment of the present application provides a storage medium storing an executable program. When the executable program is executed by a processor, the backscatter-based transmission method performed by the above-mentioned first device is implemented.

[0013] In a tenth aspect, an embodiment of the present application provides a storage medium storing an executable program, which, when executed by a processor, implements the backscatter-based transmission method performed by the above-mentioned second device.

[0014] In an eleventh aspect, an embodiment of the present application provides a computer program product, comprising computer program instructions, which enable a computer to execute the backscatter-based transmission method performed by the above-mentioned first device.

[0015] In a twelfth aspect, an embodiment of the present application provides a computer program product, comprising computer program instructions, which enable a computer to execute the backscatter-based transmission method performed by the above-mentioned second device.

[0016] In a thirteenth aspect, an embodiment of the present application provides a computer program, which enables a computer to execute the backscatter-based transmission method performed by the above-mentioned first device.

[0017] In a fourteenth aspect, an embodiment of the present application provides a computer program, which enables a computer to execute the backscatter-based transmission method performed by the above-mentioned second device.

[0018] The backscatter-based transmission method, electronic device, and storage medium provided in embodiments of the present application include: a second device transmitting a detection signal at a first frequency; a first device receiving a backscatter signal corresponding to the detection signal; the backscatter signal including information indicating insufficient energy for a third device or information acquired by the third device; and the second device transmitting electromagnetic waves based on the backscatter signal to provide energy to the third device. By transmitting the detection signal and receiving the reflected signal corresponding to the detection signal on two independent devices, the structural complexity of the first device can be reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the structure of the communication system according to an embodiment of the present application;

[0020] Figure 2 This is a schematic diagram of an optional processing flow of the backscatter-based transmission method according to an embodiment of the present application;

[0021] Figure 3 This is a schematic diagram of another optional processing flow of the backscatter-based transmission method according to an embodiment of the present application;

[0022] Figure 4 This is a schematic diagram of the composition structure of the first device according to an embodiment of the present application;

[0023] Figure 5 This is a schematic diagram of the composition structure of the second device according to an embodiment of the present application;

[0024] Figure 6 This is a schematic diagram of the hardware structure of the electronic device according to an embodiment of the present application. DETAILED DESCRIPTION

[0025] In order to enable a more detailed understanding of the features and technical contents of the embodiments of the present application, the implementation of the embodiments of the present application is described in detail below with reference to the accompanying drawings. The attached drawings are for reference only and are not used to limit the embodiments of the present application.

[0026] In wireless communication systems, a transmitter generates a carrier wave with a specific frequency or frequencies. Useful information is superimposed on the carrier wave through amplitude, phase, and frequency offset. The carrier wave carrying this useful information is then transmitted into space via an antenna. During this process, the transmitter consumes the most energy.

[0027] A vast array of electromagnetic wave signals of various frequencies exist in the space environment. Backscatter communication is a technology that utilizes these electromagnetic waves to transmit useful information. Because backscatter communication devices lack dedicated radio frequency (RF) components to generate carrier waves, their cost, power consumption, and size are kept low. When these devices need to transmit information, they use antennas to reflect electromagnetic waves from the space environment. Using devices such as metamaterials or diodes, they can superimpose the desired information on the reflected electromagnetic waves. For example, they can modify the frequency, phase, and amplitude of the reflected electromagnetic waves to achieve the desired information transmission.

[0028] Backscatter communication technology is ideal for transmitting information from environmental sensors due to its low cost, power consumption, and device size. For example, temperature and humidity sensors scattered throughout the environment use backscatter communication to transmit collected data. These sensors are in high demand and widely distributed, so backscatter communication can significantly extend the life of sensor batteries; some designs can even eliminate the need for battery power. Therefore, backscatter communication holds great promise for application in these environmental sensors.

[0029] The above describes the basic principles of backscatter communication. The following describes energy harvesting technology combined with backscatter communication.

[0030] As mentioned above, backscatter communication is suitable for low-cost sensors. Although backscatter communication can significantly reduce the energy required for communication, sensors still require energy to collect signals. If these sensors can also obtain energy from the environment, then the sensor signal collection and transmission processes will rely solely on ambient electromagnetic waves, meaning the sensor itself is passive, which will greatly expand the application scenarios of backscatter communication.

[0031] Backscatter communication relies on electromagnetic waves in the surrounding environment. However, in some scenarios, when a sensor needs to transmit data, there may not be suitable electromagnetic waves in the surrounding environment. Although there are many sources of electromagnetic waves in the environment, the structure of devices using backscatter communication is generally simple, and their reflective antenna design is also relatively simple. If the surrounding electromagnetic waves do not match the reflective antenna of the backscatter communication device, the information collected by the backscatter communication device cannot be transmitted through the electromagnetic waves in the environment.

[0032] In order to solve the above problem, the device that receives the backscatter signal can be used to actively emit electromagnetic waves of a specific frequency; wherein, the specific frequency is the frequency that can be supported by the antenna of the device that supports backscatter communication, and by receiving the reflected signal of the above signal, the purpose of information transmission based on backscatter communication is achieved.

[0033] However, in this scheme, the transmitter that transmits the electromagnetic waves used in backscatter communication and the receiver that receives the reflected signals are located on the same device, which can cause very serious self-interference (i.e., interference from the transmitter to the receiver located on the same device). Because backscatter communication relies solely on reflected electromagnetic waves to transmit information, the transmission distance is generally limited. Using the above method, the time interval from the transmitter sending the signal to the receiver receiving the reflected signal is very short, usually on the order of less than a microsecond (us), making it impossible to use time division to avoid the strong interference of the transmitted signal on the received signal.

[0034] To mitigate the strong interference from the transmitter on the receiver, possible approaches include adding filters to the receiver front end to filter out strong interference, using digital methods to reconstruct and eliminate interference, and so on. While these methods can address the issue of strong interference from the transmitter on the receiver, they are relatively complex. Adopting any of these methods significantly increases the complexity of the receiver implementation, and thus the cost. As mentioned earlier, a major application of backscatter communication is collecting signals from low-cost environmental sensors. However, addressing the issue of strong self-interference significantly increases the cost of using backscatter communication.

[0035] When using electromagnetic waves in the surrounding environment to transmit information collected by sensors, antenna arrays can be used to acquire these waves. However, if multiple electromagnetic waves are present in the surrounding environment, the efficiency of acquiring these waves is extremely low. One reason is that the distribution of these waves is random, and another is that the efficiency of antennas that can support these waves is relatively low.

[0036] The technical solutions of the embodiments of the present application can be applied to various communication systems, such as: global system of mobile communication (GSM) system, code division multiple access (CDMA) system, wideband code division multiple access (WCDMA) system, general packet radio service (GPRS), long term evolution (LTE) system, LTE frequency division duplex (FDD) system, LTE time division duplex (TDD) system, advanced long term evolution (LTE-A) system, new radio (NR) system, NR system evolution system, LTE on unlicensed band (LTE-based access to unlicensed spectrum, LTE-U) system, NR on unlicensed band (NR-based access to unlicensed spectrum, NR-U) system, universal mobile telecommunication system (UMTS), world wide interoperability for microwave access (WMI), etc. access, WiMAX) communication system, wireless local area networks (WLAN), wireless fidelity (WiFi), next generation communication system or other communication systems, etc.

[0037] Generally speaking, traditional communication systems support a limited number of connections and are easy to implement. However, with the development of communication technology, mobile communication systems will not only support traditional communications, but will also support, for example, device-to-device (D2D) communication, machine-to-machine (M2M) communication, machine-type communication (MTC), and vehicle-to-vehicle (V2V) communication, etc. The embodiments of the present application can also be applied to these communication systems.

[0038] The system architecture and business scenarios described in the embodiments of the present application are intended to more clearly illustrate the technical solutions of the embodiments of the present application, and do not constitute a limitation on the technical solutions provided in the embodiments of the present application. Ordinary technicians in this field will know that with the evolution of network architecture and the emergence of new business scenarios, the technical solutions provided in the embodiments of the present application are also applicable to similar technical problems.

[0039] The network devices involved in the embodiments of the present application may be ordinary base stations (such as NodeB or eNB or gNB), new radio controllers (new radio controller, NR controller), centralized network elements (centralized unit), new wireless base stations, radio frequency remote modules, micro base stations, relays, distributed network elements (distributed unit), transmission reception points (TRP), transmission points (TP) or any other devices. The embodiments of the present application do not limit the specific technology and specific device form adopted by the network devices. For the convenience of description, in all embodiments of the present application, the above-mentioned devices that provide wireless communication functions for terminal devices are collectively referred to as network devices.

[0040] In the embodiments of the present application, the terminal device may be any terminal, for example, the terminal device may be a user equipment for machine type communication. That is, the terminal device may also be referred to as a user equipment UE, a mobile station (MS), a mobile terminal, a terminal, etc. The terminal device may communicate with one or more core networks via a radio access network (RAN). For example, the terminal device may be a mobile phone (or a "cellular" phone), a computer with a mobile terminal, etc. For example, the terminal device may also be a portable, pocket-sized, handheld, computer-built-in, or vehicle-mounted mobile device that exchanges language and / or data with a radio access network. This is not specifically limited in the embodiments of the present application.

[0041] Optionally, the network device and terminal device can be deployed on land, including indoors or outdoors, handheld or vehicle-mounted; can also be deployed on the water surface; can also be deployed in the air on aircraft, balloons, and artificial satellites. The embodiments of this application do not limit the application scenarios of the network device and terminal device.

[0042] Optionally, the network device and the terminal device, and the terminal device and the terminal device may communicate through a licensed spectrum (licensed spectrum), or may communicate through an unlicensed spectrum (unlicensed spectrum), or may communicate through both a licensed spectrum and an unlicensed spectrum. The network device and the terminal device, and the terminal device and the terminal device may communicate through a spectrum below 7 gigahertz (GHz), or may communicate through a spectrum above 7 GHz, or may communicate using a spectrum below 7 GHz and a spectrum above 7 GHz at the same time. The embodiments of the present application do not limit the spectrum resources used between the network device and the terminal device.

[0043] Generally speaking, traditional communication systems support a limited number of connections and are easy to implement. However, with the development of communication technology, mobile communication systems will not only support traditional communications, but will also support, for example, device-to-device (D2D) communication, machine-to-machine (M2M) communication, machine-type communication (MTC), and vehicle-to-vehicle (V2V) communication, etc. The embodiments of the present application can also be applied to these communication systems.

[0044] For example, the communication system 100 used in the embodiment of the present application is as follows: Figure 1 As shown. The communication system 100 may include a network device 110, which may be a device that communicates with a terminal device 120 (or referred to as a communication terminal, terminal). The network device 110 may provide communication coverage for a specific geographical area and may communicate with terminal devices located within the coverage area. Optionally, the network device 110 may be a base station (Base Transceiver Station, BTS) in a GSM system or a CDMA system, a base station (NodeB, NB) in a WCDMA system, an evolved base station (Evolutional Node B, eNB or eNodeB) in an LTE system, or a wireless controller in a cloud radio access network (Cloud Radio Access Network, CRAN), or the network device may be a mobile switching center, a relay station, an access point, a vehicle-mounted device, a wearable device, a hub, a switch, a bridge, a router, a network-side device in a 5G network, or a network device in a future evolved public land mobile network (Public Land Mobile Network, PLMN), etc.

[0045] The communication system 100 also includes at least one terminal device 120 located within the coverage area of ​​the network device 110. As used herein, "terminal device" includes, but is not limited to, a device that is connected via a wired line, such as a Public Switched Telephone Network (PSTN), a Digital Subscriber Line (DSL), a digital cable, a direct cable connection; and / or another data connection / network; and / or via a wireless interface, such as a cellular network, a Wireless Local Area Network (WLAN), a digital television network such as a DVB-H network, a satellite network, an AM-FM broadcast transmitter; and / or another terminal device configured to receive / send communication signals; and / or an Internet of Things (IoT) device. A terminal device configured to communicate via a wireless interface may be referred to as a "wireless communication terminal," "wireless terminal," or "mobile terminal." Examples of mobile terminals include, but are not limited to, satellite or cellular telephones; Personal Communications System (PCS) terminals that may combine cellular radiotelephones with data processing, fax, and data communications capabilities; PDAs that may include radiotelephones, pagers, Internet / Intranet access, web browsers, organizers, calendars, and / or Global Positioning System (GPS) receivers; and conventional laptop and / or palmtop receivers or other electronic devices that include radiotelephone transceivers. A terminal device may be referred to as an access terminal, user equipment (UE), a subscriber unit, a subscriber station, a mobile station, a mobile station, a remote station, a remote terminal, a mobile device, a user terminal, a terminal, a wireless communication device, a user agent, or a user device. The access terminal can be a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA), a handheld device with wireless communication capabilities, a computing device or other processing device connected to a wireless modem, an in-vehicle device, a wearable device, a terminal device in a 5G network, or a terminal device in a future evolved PLMN, etc.

[0046] Optionally, terminal devices 120 may perform device-to-device (D2D) communication with each other.

[0047] Optionally, the 5G system or 5G network may also be referred to as a New Radio (NR) system or NR network.

[0048] Figure 1 One network device and two terminal devices are shown as an example. Optionally, the communication system 100 may include multiple network devices and each network device may include another number of terminal devices within its coverage area. This embodiment of the present application does not limit this.

[0049] Optionally, the communication system 100 may further include other network entities such as a network controller and a mobility management entity, which is not limited in the embodiment of the present application.

[0050] It should be understood that the device with communication function in the network / system in the embodiment of the present application can be called a communication device. Figure 3 Taking the communication system 100 shown as an example, the communication equipment may include a network device 110 and a terminal device 120 with communication functions. The network device 110 and the terminal device 120 may be the specific devices described above and will not be repeated here; the communication equipment may also include other devices in the communication system 100, such as a network controller, a mobile management entity and other network entities, which is not limited in the embodiments of the present application.

[0051] An optional processing flow of the backscatter-based transmission method provided in the embodiment of the present application is as follows: Figure 2 As shown, the following steps are included:

[0052] Step S201: A first device receives a backscattered signal, where the backscattered signal corresponds to a detection signal transmitted by a second device at a first frequency.

[0053] In some embodiments, the first device and the second device are two independent devices; the first device transmits a detection signal at a first frequency, and a backscattered signal corresponding to the detection signal is received by the first device.

[0054] In some embodiments, when the third device has sufficient energy, the backscatter signal includes information acquired by the third device. For example, if the third device is a temperature sensor, and the temperature sensor has sufficient energy, the backscatter signal includes the temperature acquired by the temperature sensor. Of course, the backscatter signal may also include identification information of the third device and / or type information of the third device. The identification information of the third device may be the ID of the third device; the type information of the third device may be the type of the third device. For example, if the third device is a sensor, the type information of the third device may be a temperature sensor, a humidity sensor, a pressure sensor, or the like. The backscatter signal may also include the frequency of the electromagnetic wave required to provide energy to the third device.

[0055] In other embodiments, the backscatter signal includes indication information indicating that the third device has insufficient energy; wherein the third device may be a device independent of the first device and the second device, such as a sensor.

[0056] In a specific implementation, the indication information indicating insufficient energy for the third device may be a single bit of information indicating insufficient energy for the third device. Of course, the backscatter signal may also include identification information for the third device and / or type information for the third device. The identification information for the third device may be its ID; the type information for the third device may be its type. For example, if the third device is a sensor, the type information for the third device may be a temperature sensor, a humidity sensor, a pressure sensor, or the like. The backscatter signal may also include the frequency of the electromagnetic wave required to provide energy to the third device.

[0057] If the backscattered signal includes information indicating insufficient energy for the third device, the first device may have difficulty determining the transmission power when providing electromagnetic energy waves to the third device. Therefore, if the first device can obtain the location information of the third device, it can more efficiently provide energy to the third device using a beamforming method.

[0058] In order for the first device to obtain the location information of the third device, some achievable approaches are that the backscatter signal may further include: the location information of the third device.

[0059] In order for the first device to obtain the location information of the third device, another possible implementation method is that the first device determines the time when the second device transmits the detection signal and the first distance between the second device and the third device; the first device determines the second distance between the first device and the third device based on the time when the second device transmits the detection signal and the first distance; and the first device determines the location information of the third device based on the first distance and the second distance. The time when the second device transmits the detection signal and the first distance between the second device and the third device can be determined by the second device. For example, the second device can determine the first distance between the second device and the third device based on the time when it transmits the detection signal and the time when it receives the backscattered signal corresponding to the detection signal. The second device then sends the first distance and the time when the second device transmits the detection signal to the first device. The first device can determine the first distance between the first device and the third device based on the time when it receives the backscattered signal and the time when the third device transmits the backscattered signal. Based on the principle of three-point positioning, the location information of the third device can be estimated based on the first distance and the second distance.

[0060] In some embodiments, after determining the location information of the third device, the first device can estimate the maximum distance from the third device to which energy is to be harvested, thereby determining the transmission power of the electromagnetic waves emitted by the first device. The first device can also collect information from the third devices to estimate which third devices no longer require energy harvesting and adjust the first device's transmission power accordingly.

[0061] The first device can also estimate the distribution of the third device to be energy acquired. For example, if the third devices are concentrated in the first location area, the first device (multi-antenna transmission) concentrates energy to transfer energy to the first location area, thereby speeding up the energy acquisition process of the third devices in the first location area.

[0062] The first device can associate information collected by a third device with the third device's location information. For example, associating environmental information like temperature and humidity with the corresponding collection location has significant application value. For example, associating temperature information with location information can help detect regional temperature anomalies and facilitate safety monitoring; associating gas sensors with location information can help detect gas leaks at specific locations; and associating light sensors with location information can determine light or illumination conditions at different locations.

[0063] In some embodiments, when the backscatter signal includes indication information indicating that the third device has insufficient energy, the method further includes:

[0064] Step S202: the first device transmits electromagnetic waves at a second frequency.

[0065] The second frequency may be the frequency of the electromagnetic waves required to provide energy to the third device, as included in the backscattered signal received by the first device. That is, the first device transmits electromagnetic waves at the frequency indicated in the backscattered signal to provide energy to the third device. This allows the first device to accurately provide the electromagnetic waves required by the third device by knowing in advance the frequency of the electromagnetic waves required by the third device, thereby improving the efficiency of the third device in obtaining energy.

[0066] Of course, when the first device determines that it is not necessary to obtain the information collected by the third device based on the identification information of the third device and / or the type information of the third device included in the received backscatter signal, the first device may not emit electromagnetic waves.

[0067] An optional processing flow of the backscatter-based transmission method provided in the embodiment of the present application is as follows: Figure 3 As shown, the following steps are included:

[0068] Step S301: The second device transmits a detection signal at a first frequency, and a backscattered signal corresponding to the detection signal is received by the first device.

[0069] In some embodiments, the backscatter signal includes indication information indicating that the third device has insufficient energy or information acquired by the third device.

[0070] In some embodiments, the backscatter signal may further include identification information of the third device and / or type information of the third device. The identification information of the third device may be an ID of the third device; the type information of the third device may be the type of the third device. For example, if the third device is a sensor, the type information of the third device may be a temperature sensor, a humidity sensor, or a pressure sensor.

[0071] In some embodiments, when the backscatter signal includes indication information indicating that the third device is short of energy, the backscatter signal may further include the frequency of the electromagnetic wave required to provide energy to the third device.

[0072] In some embodiments, when the backscatter signal includes indication information indicating that the third device has insufficient energy, the backscatter signal also includes: location information of the third device.

[0073] In some embodiments, when the backscatter signal includes indication information indicating that the third device has insufficient energy, the method further includes:

[0074] Step S302: The second device sends the time when the second device transmits the detection signal to the first device.

[0075] Step S303: The second device receives the backscattered signal. The second device determines a first distance between the second device and the third device based on the time when the second device transmits the detection signal and the time when the second device receives the backscattered signal.

[0076] In this way, the first device can determine the location information of the third device based on the first distance and the time when the second device transmits the detection signal, and the first device can provide energy to the third device more efficiently in the form of a beam.

[0077] It should be noted that, in each embodiment of the present application, the function of the first device can be implemented by a receiver, and the function of the second device can be implemented by a transmitter.

[0078] It should be understood that in the various embodiments of the present application, the size of the serial numbers of the above-mentioned processes does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0079] In order to implement the above-mentioned backscatter-based transmission method, the embodiment of the present application provides a first device, and the optional structural diagram of the first device 400 is as follows: Figure 4 Shown, including:

[0080] A first receiving unit 401 is configured to receive a backscattered signal corresponding to a detection signal transmitted by a second device at a first frequency;

[0081] The backscatter signal includes indication information indicating that the third device has insufficient energy or information acquired by the third device.

[0082] In some embodiments, the backscatter signal further includes: identification information of the third device and / or type information of the third device.

[0083] In some embodiments, when the backscatter signal includes indication information indicating that the third device is short of energy, the backscatter signal further includes: a frequency of electromagnetic waves required to provide energy to the third device.

[0084] In some embodiments, when the backscatter signal includes indication information indicating that the third device is short of energy, the backscatter signal further includes: a frequency of electromagnetic waves required to provide energy to the third device.

[0085] In some embodiments, when the backscatter signal includes indication information indicating that the third device has insufficient energy, the backscatter signal further includes: location information of the third device.

[0086] In some embodiments, the first device 400 further includes: a first processing unit 402, configured to determine a second distance between the first device and the third device based on the time when the second device transmits the detection signal and the first distance; and determine the location information of the third device based on the first distance and the second distance.

[0087] In some embodiments, the first device 400 further includes: a first sending unit 403 configured to transmit electromagnetic waves at a second frequency.

[0088] In some embodiments, the second frequency is a frequency of electromagnetic waves included in the backscattered signal and required to provide energy to the third device.

[0089] In order to implement the above-mentioned backscatter-based transmission method, the embodiment of the present application provides a second device, and the optional structural diagram of the second device 500 is as follows: Figure 5 Shown, including:

[0090] The second sending unit 501 is configured to transmit a detection signal at a first frequency, and a backscattered signal corresponding to the detection signal is received by the first device; the backscattered signal includes indication information indicating that the third device has insufficient energy or information obtained by the third device.

[0091] In some embodiments, the backscatter signal further includes: identification information of the third device and / or type information of the third device.

[0092] In some embodiments, when the backscatter signal includes indication information indicating that the third device is short of energy, the backscatter signal further includes: a frequency of electromagnetic waves required to provide energy to the third device.

[0093] In some embodiments, when the backscatter signal includes indication information indicating that the third device has insufficient energy, the backscatter signal further includes: location information of the third device.

[0094] In some embodiments, the second sending unit 501 is further configured to send the time when the second device transmits the detection signal to the first device.

[0095] In some embodiments, the second device 500 further includes a second receiving unit 502 and a second processing unit 503;

[0096] The second receiving unit 502 is configured to receive the backscattered signal;

[0097] The second processing unit 503 is configured to determine a first distance between the second device and the third device based on a time when the second device transmits the detection signal and a time when the second device receives the backscattered signal.

[0098] In some embodiments, the second sending unit 501 is further configured to send the first distance to the first device.

[0099] An embodiment of the present application also provides a first device, comprising a processor and a memory for storing a computer program that can be run on the processor, wherein the processor is configured to execute the steps of the backscatter-based transmission method performed by the above-mentioned first device when running the computer program.

[0100] An embodiment of the present application also provides a second device, comprising a processor and a memory for storing a computer program that can be run on the processor, wherein the processor is configured to execute the steps of the backscatter-based transmission method performed by the above-mentioned second device when running the computer program.

[0101] An embodiment of the present application also provides a chip, including: a processor, configured to call and run a computer program from a memory, so that a device equipped with the chip executes the backscatter-based transmission method executed by the first device.

[0102] An embodiment of the present application also provides a chip, including: a processor, configured to call and run a computer program from a memory, so that a device equipped with the chip executes the backscatter-based transmission method executed by the second device.

[0103] An embodiment of the present application further provides a storage medium storing an executable program. When the executable program is executed by a processor, the backscatter-based transmission method performed by the above-mentioned device is implemented.

[0104] An embodiment of the present application further provides a storage medium storing an executable program. When the executable program is executed by a processor, the backscatter-based transmission method performed by the above-mentioned second device is implemented.

[0105] An embodiment of the present application also provides a computer program product, including computer program instructions, which enable a computer to execute the backscatter-based transmission method performed by the first device.

[0106] An embodiment of the present application further provides a computer program product, comprising computer program instructions, which enable a computer to execute the backscatter-based transmission method performed by the second device.

[0107] An embodiment of the present application further provides a computer program, which enables a computer to execute the backscatter-based transmission method performed by the first device.

[0108] An embodiment of the present application further provides a computer program, which enables a computer to execute the backscatter-based transmission method performed by the second device.

[0109] Figure 6 700 is a schematic diagram of the hardware structure of an electronic device (first device or second device) according to an embodiment of the present application. The electronic device 700 includes: at least one processor 701, a memory 702, and at least one network interface 704. The various components in the electronic device 700 are coupled together through a bus system 705. It can be understood that the bus system 705 is used to realize the connection and communication between these components. In addition to the data bus, the bus system 705 also includes a power bus, a control bus, and a status signal bus. However, for the sake of clarity, Figure 6 Various buses are labeled as bus system 705.

[0110] It is understood that the memory 702 can be a volatile memory or a non-volatile memory, or can include both volatile and non-volatile memories. Among them, the non-volatile memory can be ROM, programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), electrically erasable programmable read-only memory (EEPROM), magnetic random access memory (FRAM), flash memory, magnetic surface memory, optical disk, or compact disc read-only memory (CD-ROM); the magnetic surface memory can be a magnetic disk or a magnetic tape. The volatile memory can be random access memory (RAM), which is used as an external cache. By way of example and not limitation, many forms of RAM are available, such as static random access memory (SRAM), synchronous static random access memory (SSRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (SDRAM), double data rate synchronous dynamic random access memory (DDRSDRAM), enhanced synchronous dynamic random access memory (ESDRAM), synchronous link dynamic random access memory (SLDRAM), and direct rambus random access memory (DRRAM). The memory 702 described in the embodiments of the present application is intended to include, but is not limited to, these and any other suitable types of memory.

[0111] The memory 702 in the embodiment of the present application is used to store various types of data to support the operation of the electronic device 700. Examples of such data include any computer program for operating on the electronic device 700, such as the application 7022. The program for implementing the method of the embodiment of the present application may be included in the application 7022.

[0112] The methods disclosed in the above embodiments of the present application can be applied to the processor 701 or implemented by the processor 701. The processor 701 may be an integrated circuit chip with signal processing capabilities. During implementation, each step of the above method can be completed by the hardware integrated logic circuit in the processor 701 or by instructions in the form of software. The above processor 701 may be a general-purpose processor, a digital signal processor (DSP), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. The processor 701 can implement or execute the various methods, steps and logic block diagrams disclosed in the embodiments of the present application. The general-purpose processor can be a microprocessor or any conventional processor, etc. The steps of the methods disclosed in the embodiments of the present application can be directly embodied as being executed by a hardware decoding processor, or can be executed by a combination of hardware and software modules in the decoding processor. The software module can be located in a storage medium, which is located in the memory 702. The processor 701 reads the information in the memory 702 and completes the steps of the above method in combination with its hardware.

[0113] In an exemplary embodiment, the electronic device 700 can be implemented by one or more application-specific integrated circuits (ASICs), DSPs, programmable logic devices (PLDs), complex programmable logic devices (CPLDs), FPGAs, general-purpose processors, controllers, MCUs, MPUs, or other electronic components to perform the aforementioned method.

[0114] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the steps in the process. Figure 1 a process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0115] These computer program instructions may also be stored in a computer readable memory that can direct a computer or other programmable data processing device to work in a specific manner, so that the instructions stored in the computer readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 a process or multiple processes and / or boxes Figure 1 The function specified in one or more boxes.

[0116] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operational steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing the instructions executed on the computer or other programmable device for implementing the process. Figure 1 a process or multiple processes and / or boxes Figure 1 A step that specifies a function in one or more boxes.

[0117] It should be understood that the terms "system" and "network" are often used interchangeably in this application. The term "and / or" in this application simply describes a relationship between associated objects, indicating that three possible relationships exist. For example, "A and / or B" can represent: A exists alone, A and B exist simultaneously, or B exists alone. Furthermore, the character " / " in this application generally indicates that the associated objects are in an "or" relationship.

[0118] The above is only a preferred embodiment of the present application and is not intended to limit the scope of protection of the present application. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present application should be included in the scope of protection of the present application.

Claims

1. A backscatter-based transmission method, comprising: The first device receives a backscattered signal corresponding to a probe signal transmitted by the second device at the first frequency; The backscattered signal includes indication information indicating insufficient energy of the third device or information acquired by the third device; The method further comprises: The first device determines, by the first device, a time at which the second device transmits a detection signal and a first distance between the second device and the third device; determining, by the first device, a second distance between the first device and the third device based on a time when the second device transmits a detection signal and the first distance; The first device determines the location information of the third device based on the first distance and the second distance; The first device determines, based on the location information of the third device, a maximum distance from the third device from which energy is to be obtained, so that the first device determines the transmission power of the electromagnetic wave to be transmitted based on the maximum distance; Alternatively, the first device associates the information acquired by the third device with the location information of the third device based on the location information of the third device.

2. The method according to claim 1, wherein The backscattered signal also includes: Identification information of the third device and / or type information of the third device.

3. The method according to claim 1 or 2, wherein: In a case where the backscatter signal includes indication information indicating that the third device has insufficient energy, the backscatter signal further includes: The frequency of the electromagnetic waves required to provide energy to the third device.

4. The method according to claim 1 or 2, wherein: In a case where the backscatter signal includes indication information indicating that the third device has insufficient energy, the backscatter signal further includes: The location information of the third device.

5. The method according to claim 1 or 2, wherein: In a case where the backscatter signal includes indication information indicating that the third device has insufficient energy, the method further includes: The first device transmits electromagnetic waves at a second frequency.

6. The method according to claim 5, wherein: The second frequency is the frequency of the electromagnetic wave included in the backscatter signal and required to provide energy to the third device.

7. A backscatter-based transmission method, the method comprising: The second device transmits a detection signal at a first frequency, and a backscattered signal corresponding to the detection signal is received by the first device; The backscattered signal includes indication information indicating insufficient energy of the third device or information acquired by the third device; The method further comprises: The second device sends the time when the second device transmits the detection signal and the first distance between the second device and the third device to the first device, so that the first device determines the second distance between the first device and the third device based on the time when the second device transmits the detection signal and the first distance, and the position information of the third device determined based on the first distance and the second distance; so that the first device determines the farthest distance from the third device to obtain energy based on the position information of the third device, and determines the transmission power of the electromagnetic wave transmitted based on the farthest distance; or, so that the first device associates the information obtained by the third device with the position information of the third device based on the position information of the third device.

8. The method according to claim 7, wherein: The backscattered signal also includes: Identification information of the third device and / or type information of the third device.

9. The method according to claim 7 or 8, wherein In a case where the backscatter signal includes indication information indicating that the third device has insufficient energy, the backscatter signal further includes: The frequency of the electromagnetic waves required to provide energy to the third device.

10. The method according to claim 7 or 8, wherein In a case where the backscatter signal includes indication information indicating that the third device has insufficient energy, the backscatter signal further includes: The location information of the third device.

11. The method according to claim 7 or 8, wherein: The method further comprises: The second device receives the backscattered signal; The second device determines a first distance between the second device and the third device based on a time when the second device transmits the detection signal and a time when the second device receives the backscattered signal.

12. A first device, comprising: a first receiving unit configured to receive a backscattered signal corresponding to a probe signal transmitted by the second device at the first frequency; The backscattered signal includes indication information indicating insufficient energy of the third device or information acquired by the third device; a first processing unit configured to determine a time when the second device transmits a detection signal and a first distance between the second device and the third device; determining a second distance between the first device and the third device based on a time when the second device transmits a detection signal and the first distance; determining location information of the third device based on the first distance and the second distance; determining, based on the location information of the third device, a maximum distance from the third device from which energy is to be harvested, so that the first device determines the transmission power of the electromagnetic waves to be transmitted based on the maximum distance; Or, the information acquired by the third device is associated with the location information of the third device based on the location information of the third device.

13. The first device according to claim 12, wherein: The backscattered signal also includes: Identification information of the third device and / or type information of the third device.

14. The first device according to claim 12 or 13, wherein: In a case where the backscatter signal includes indication information indicating that the third device has insufficient energy, the backscatter signal further includes: The frequency of the electromagnetic waves required to provide energy to the third device.

15. The first device according to claim 12 or 13, wherein: In a case where the backscatter signal includes indication information indicating that the third device has insufficient energy, the backscatter signal further includes: The frequency of the electromagnetic waves required to provide energy to the third device.

16. The first device according to claim 12 or 13, wherein: In a case where the backscatter signal includes indication information indicating that the third device has insufficient energy, the backscatter signal further includes: The location information of the third device.

17. The first device according to claim 12 or 13, wherein: The first device further includes: The first transmitting unit is configured to transmit electromagnetic waves at a second frequency.

18. The first device according to claim 17, wherein: The second frequency is the frequency of the electromagnetic wave included in the backscatter signal and required to provide energy to the third device.

19. A second device, comprising: a second transmitting unit configured to transmit a detection signal at a first frequency, wherein a backscattered signal corresponding to the detection signal is received by the first device; The backscattered signal includes indication information indicating insufficient energy of the third device or information acquired by the third device; The second sending unit is further configured to send, to the first device, a time when the second device transmits the detection signal and a first distance between the second device and the third device, so that the first device determines a second distance between the first device and the third device based on the time when the second device transmits the detection signal and the first distance, and determines location information of the third device based on the first distance and the second distance; so that the first device determines a maximum distance from the third device to be energy-harvested based on the location information of the third device, and determines a transmission power of the electromagnetic waves to be transmitted based on the maximum distance; Or, the first device may associate the information acquired by the third device with the location information of the third device based on the location information of the third device.

20. The second device according to claim 19, wherein The backscattered signal also includes: Identification information of the third device and / or type information of the third device.

21. The second device according to claim 19 or 20, wherein: In a case where the backscatter signal includes indication information indicating that the third device has insufficient energy, the backscatter signal further includes: The frequency of the electromagnetic waves required to provide energy to the third device.

22. The second device according to claim 19 or 20, wherein: In a case where the backscatter signal includes indication information indicating that the third device has insufficient energy, the backscatter signal further includes: The location information of the third device.

23. The second device according to claim 19 or 20, wherein: The second device further includes a second receiving unit and a second processing unit; The second receiving unit is configured to receive the backscattered signal; The second processing unit is configured to determine a first distance between the second device and the third device based on a time when the second device transmits a detection signal and a time when the second device receives the backscattered signal.

24. An electronic device comprising a processor and a memory for storing a computer program capable of running on the processor, wherein: When the processor is used to run the computer program, it performs the steps of the backscatter-based transmission method according to any one of claims 1 to 6.

25. An electronic device comprising a processor and a memory for storing a computer program capable of running on the processor, wherein: When the processor is used to run the computer program, it performs the steps of the backscatter-based transmission method according to any one of claims 7 to 11.

26. A storage medium storing an executable program, wherein when the executable program is executed by a processor, the backscatter-based transmission method according to any one of claims 1 to 6 is implemented.

27. A storage medium storing an executable program, wherein when the executable program is executed by a processor, the backscatter-based transmission method according to any one of claims 7 to 11 is implemented.

28. A computer program product comprising computer program instructions, the computer program instructions causing a computer to execute the backscatter-based transmission method according to any one of claims 1 to 6.

29. A computer program product comprising computer program instructions, the computer program instructions causing a computer to execute the backscatter-based transmission method according to any one of claims 7 to 11.

30. A chip, comprising: A processor, configured to call and run a computer program from a memory, so that a device equipped with the chip executes the backscatter-based transmission method according to any one of claims 1 to 6.

31. A chip, comprising: A processor, configured to call and run a computer program from a memory, so that a device equipped with the chip executes the backscatter-based transmission method according to any one of claims 7 to 11.

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