WO2023179792A1 - Backscatter communication method and apparatus, and device - Google Patents

Abstract

The present application belongs to the technical field of communications. Disclosed are a backscatter communication method and apparatus, and a device. A backscatter communication method of the embodiments of the present application comprises: a first device sends a target signal to at least one second device, wherein the second device is a device for transmitting information to be sent by modulating same on a target carrier provided by another device other than the second device; and the first device receives a response signal sent by a third device, the response signal being determined by the third device according to the target signal, the response signal being used for feeding back to the first device that the third device may join a backscatter communication (BSC) group, and the third device being one of the at least one second devices.

Description

Methods, devices and equipment for backscatter communication

cross reference

This invention requires the priority of the Chinese patent application submitted to the China Patent Office on March 25, 2022, with the application number 202210303015. incorporated herein by reference.

Technical field

The present application belongs to the field of communication technology, and specifically relates to a method, device and equipment for backscatter communication.

Background technique

The future sixth generation ( ^6th Generation, 6G) communication network needs to support the Internet of Everything, and the number of IoT devices involved may reach hundreds of billions. Its connection density is compared with the fifth generation communication network ( ^5th Generation, 5G). It has been improved by 10-100 times, reaching a connection density of 10-100/ ^m2 .

Among them, cellular networking, low cost, low power consumption or even zero power consumption, and passivity are the main trends in the development of IoT devices in the future. However, taking passive terminals as an example, considering that they are limited by their own power consumption and hardware capabilities , the communication transmission distance is mostly below 10 meters, which is far from the goal of cellular coverage of 100 meters. Therefore, how to achieve effective management of IoT devices such as passive terminals has become a current problem that needs to be solved.

Contents of the invention

Embodiments of the present application provide a backscatter communication method, device and equipment, which can achieve effective management of massive Internet of Things devices.

In a first aspect, a method of backscatter communication is provided, including: a first device sending a target signal to at least one second device, wherein the second device modulates the information to be sent on a signal in addition to the second device. A device that transmits on a target carrier provided by other devices other than the device; the first device receives a response signal sent by a third device, the response signal is determined by the third device based on the target signal, and the response The signal is used to feed back to the first device that the third device can join the BSC group, and the third device belongs to the at least one second device.

In a second aspect, a method of backscatter communication is provided. The method includes: a third device receiving a target signal sent by the first device; and the third device determines to join the BSC group indicated by the target signal. In this case, a response signal is sent to the first device, wherein the third device is a device that modulates the information to be sent on a target carrier provided by a device other than the second device.

In a third aspect, a backscatter communication device is provided, including: a first sending module, For transmitting a target signal to at least one second device, wherein the second device is a device that modulates the information to be sent on a target carrier provided by another device other than the second device; the first receiving Module, configured to receive a response signal sent by a third device, where the response signal is determined by the third device based on the target signal, and the response signal is used to feed back to the first device that the third device can join In the BSC group, the third device belongs to the at least one second device.

In a fourth aspect, a device for backscatter communication is provided, including: a second receiving module for receiving a target signal sent by the first device; a second sending module for determining to add the target signal indicated by the target signal. In the case of a BSC group, a response signal is sent to the first device, where the third device is a device that modulates the information to be sent on a target carrier provided by other devices except the second device.

In a fifth aspect, a device is provided. The device includes a processor and a memory. The memory stores programs or instructions that can be run on the processor. When the program or instructions are executed by the processor, the following implementations are implemented: The steps of the method described in the first aspect or the second aspect.

In a sixth aspect, a device is provided, including a processor and a communication interface, wherein the communication interface is coupled to the processor, and the processor is used to run programs or instructions to implement the method described in the first aspect. steps, or steps for implementing the method as described in the second aspect.

In a seventh aspect, a system for backscatter communication is provided, including: a first device and a second device. The first device can be used to perform the steps of the backscatter communication method as described in the first aspect. The second device may be used to perform the steps of the method for backscatter communication as described in the second aspect.

In an eighth aspect, a readable storage medium is provided. Programs or instructions are stored on the readable storage medium. When the programs or instructions are executed by a processor, the steps of the method described in the first aspect are implemented, or the steps of the method are implemented as described in the first aspect. The steps of the method described in the second aspect.

In a ninth aspect, a chip is provided. The chip includes a processor and a communication interface. The communication interface is coupled to the processor. The processor is used to run programs or instructions to implement the method described in the first aspect. steps, or steps to implement the method described in the second aspect.

In a tenth aspect, a computer program product/program product is provided, the computer program/program product is stored in a storage medium, and the computer program/program product is executed by at least one processor to implement the first aspect or the third aspect. The steps of the method described in the second aspect.

In this embodiment of the present application, the first device can implement effective BSC group access and control management for multiple second devices by sending target signals and receiving response signals, so that the first device can perform control and management on BSC devices. Large-scale, centralized management improves the transmission efficiency of the BSC system.

Description of the drawings

Figure 1 is a schematic structural diagram of a wireless communication system provided by an exemplary embodiment of the present application.

Figure 2a is a schematic flowchart of a backscatter communication method provided by an exemplary embodiment of the present application.

Figure 2b is a schematic structural diagram of a BSC network provided by an exemplary embodiment of the present application.

Figure 3 is a schematic flowchart of a backscatter communication method provided by another exemplary embodiment of the present application.

Figure 4a is a schematic diagram of the frame structure of a target signal provided by an exemplary embodiment of the present application.

Figure 4b is a schematic diagram of the frame structure of a target signal provided by another exemplary embodiment of the present application.

Figure 4c is a schematic diagram of the frame structure of a target signal provided by yet another exemplary embodiment of the present application.

Figure 4d is a schematic diagram of the frame structure of a target signal provided by yet another exemplary embodiment of the present application.

Figure 4e is a schematic diagram of the frame structure of a target signal provided by yet another exemplary embodiment of the present application.

Figure 5 is a schematic flowchart of a backscatter communication method provided by an exemplary embodiment of the present application.

Figure 6 is a schematic structural diagram of a backscatter communication device provided by an exemplary embodiment of the present application.

FIG. 7 is a schematic structural diagram of a backscatter communication device provided by another exemplary embodiment of the present application.

Figure 8 is a schematic structural diagram of a device provided by an exemplary embodiment of the present application.

Figure 9 is a schematic structural diagram of a terminal provided by an exemplary embodiment of the present application.

Figure 10 is a schematic structural diagram of a network-side device provided by an exemplary embodiment of the present application.

Detailed ways

The technical solutions in the embodiments of the present application will be clearly described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, but not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art fall within the scope of protection of this application.

The terms "first", "second", etc. in the description and claims of this application are used to distinguish similar objects and are not used to describe a specific order or sequence. It is to be understood that the terms so used are interchangeable under appropriate circumstances so that the embodiments of the present application can be practiced in sequences other than those illustrated or described herein, and that "first" and "second" are distinguished objects It is usually one type, and the number of objects is not limited. For example, the first object can be one or multiple. In addition, "and/or" in the description and claims indicates at least one of the connected objects, and the character "/" generally indicates that the related objects are in an "or" relationship.

It is worth pointing out that the technology described in the embodiments of this application is not limited to Long Term Evolution (LTE)/LTE Evolution (LTE-Advanced, LTE-A) systems, and can also be used in other wireless communication systems, such as code Code Division Multiple Access (CDMA), Time Division Multiple Access (TDMA), Frequency Division Multiple Access (FDMA), Orthogonal Frequency Division Multiple Access, OFDMA), Single-carrier Frequency-Division Multiple Access (SC-FDMA) and other systems. Examples of this application The terms "system" and "network" in are often used interchangeably, and the techniques described can be used with both the systems and radio technologies mentioned above and with other systems and radio technologies. The following description describes a New Radio (NR) system for example purposes, and NR terminology is used in much of the following description, but these techniques can also be applied to applications other than NR system applications, such as 6th ^generation Generation, 6G) communication system.

Figure 1 shows a block diagram of a wireless communication system to which embodiments of the present application are applicable. The wireless communication system includes a terminal 11 and a network side device 12. Among them, the terminal 11 can be a mobile phone, a tablet computer (Tablet Personal Computer), a laptop computer (Laptop Computer), or a notebook computer, a personal digital assistant (Personal Digital Assistant, PDA), a handheld computer, a netbook, or a super mobile personal computer. (ultra-mobile personal computer, UMPC), mobile Internet device (Mobile Internet Device, MID), augmented reality (augmented reality, AR)/virtual reality (VR) equipment, robots, wearable devices (Wearable Device) , vehicle user equipment (VUE), pedestrian terminal (Pedestrian User Equipment, PUE), smart home (home equipment with wireless communication functions, such as refrigerators, TVs, washing machines or furniture, etc.), game consoles, personal computers (personal computer, PC), teller machine or self-service machine and other terminal-side devices. Wearable devices include: smart watches, smart bracelets, smart headphones, smart glasses, smart jewelry (smart bracelets, smart bracelets, smart rings, smart necklaces, smart anklets) bracelets, smart anklets, etc.), smart wristbands, smart clothing, etc. It should be noted that the embodiment of the present application does not limit the specific type of the terminal 11. The network side equipment 12 may include access network equipment or core network equipment, where the access network equipment 12 may also be called wireless access network equipment, radio access network (Radio Access Network, RAN), radio access network function or Wireless access network unit. The access network device 12 may include a base station, a Wireless Local Area Network (WLAN) access point or a Wireless Fidelity (WiFi) node, etc. The base station may be called a Node B, an Evolved Node B (eNB), Access point, Base Transceiver Station (BTS), radio base station, radio transceiver, Basic Service Set (BSS), Extended Service Set (ESS), home B node, home Evolved B node, Transmitting Receiving Point (TRP) or some other suitable term in the field, as long as the same technical effect is achieved, the base station is not limited to specific technical terms. It should be noted that in this article In the application embodiment, the base station in the NR system is only introduced as an example, and the specific type of the base station is not limited.

The technical solutions provided by the embodiments of the present application will be described in detail below with reference to the accompanying drawings through some embodiments and their application scenarios.

As shown in Figure 2a, it is a schematic flowchart of a backscatter communication method 200 provided by an exemplary embodiment of the present application. The method 200 can be, but is not limited to, executed by a first device, such as a terminal or a network side device. Specifically, it can be performed by an installation device. executed in hardware and/or software in the first device. In this embodiment, the method 200 may include at least the following steps.

S210: The first device sends a target signal to at least one second device.

The first device may also be called a common device (Legacy UE) or an anchor device. (Anchor UE) to effectively group access and control management of multiple BSC devices in the Backscatter Communication (BSC) group, thereby improving the transmission efficiency of the BSC network and saving deployment costs.

In this case, please refer to Figure 2b. In this embodiment, the first device independently performs BSC group management on the BSC network structure. In this architecture, the first device sends a target signal to at least one second device. , the target signal is used for each second device to determine whether to join the BSC group, thereby achieving effective group access and control management for second devices with different service types, energy storage capabilities, and wireless capabilities.

It can be understood that the first device is an ordinary device (User Equipment, UE) that supports the Third Generation Partnership Project (3GPP) protocol stack, and it itself may have a carrier generator, a power amplifier, and a frequency oscillator. wait. The second device is a device that transmits information by modulating it on a target carrier provided by another device other than the second device. In this embodiment, the second device may be a passive terminal device. , semi-passive terminal equipment, low-power terminal equipment, etc., are not limited here.

In this case, as an implementation manner, the first device may have the capability of at least one of the following (11)-(14), thereby realizing BSC devices with different service types, energy storage capabilities, and wireless capabilities. (i.e. the second device) for effective group access and control management.

(11) Radio frequency power supply capability, that is, the first device can be used as a BSC power supply device to provide at least one third device with a preconfigured signal waveform under the control of the network (such as access network equipment, core network equipment). The two devices send radio frequency signals to achieve the purpose of supplying energy to at least one second device.

Optionally, the radio frequency power supply capability may include the battery power of the first device, the waveform of the radio frequency power supply signal supported by the first device, etc.

(12) The ability to send BSC control commands, that is, the first device can be used as a BSC control device to send BSC control information and synchronization information to at least one second device to achieve information indication such as synchronization information and BSC signal transmission parameters.

Optionally, the ability to send BSC control commands may include a preamble synchronization sequence, control scheduling information framing, etc. that the first device can provide.

(13) Wireless capabilities that support BSC signal reception/transmission, that is, the first device can serve as a BSC data transceiver device to receive backscattered signals from the BSC device or send data to the BSC device.

Optionally, the wireless capabilities supporting BSC signal reception/transmission may be synchronization capabilities, BSC channel coding and decoding capabilities, BSC signal modulation and demodulation capabilities, antenna capabilities, precoding capabilities, and bandwidth portion supported by the first device ( Bandwidth Part, BWP) capabilities, etc.

(14) The ability to provide a target carrier, that is, the first device can be used as a device to provide a target carrier (or excitation signal) to the BSC device, and at least one second device can modulate its own information on the target carrier for transmission. .

Optionally, the capability of providing the target carrier may be the synchronization capability supported by the first device, BSC channel coding and decoding capabilities, BSC signal modulation and demodulation capabilities, antenna capabilities, precoding capabilities, BWP capabilities, etc.

Of course, in actual BSC network deployment, BSC energy supply equipment, BSC control equipment, equipment that provides target carriers for BSC equipment, and data transceiver equipment can be the same equipment or different equipment, so that they can be flexibly adapted to different needs. Network deployment is not limited in this embodiment.

In addition, when the first device sends the target signal, it may send it in a broadcast or multicast manner, which is not limited here.

S220: The first device receives the response signal sent by the third device.

Wherein, the response signal is determined by the third device according to the target signal, the response signal is used to feed back to the first device that the third device can join the BSC group, and the response signal is Transmitted in a backscattered manner by the third device belonging to the at least one second device.

In this embodiment, the first device can implement effective BSC group access and control management for multiple second devices by sending target signals and receiving response signals, thereby enabling the first device to perform large-scale control of BSC devices. , centralized management, improves the transmission efficiency of the BSC system and saves deployment costs.

As shown in Figure 3, a schematic flowchart of a backscatter communication method 300 is provided in an exemplary embodiment of the present application. The method 300 can be, but is not limited to, executed by a first device, such as a terminal or a network side device. Specifically, it can be performed by an installation device. executed in hardware and/or software in the first device. In this embodiment, the method may include at least the following steps.

S310: The first device sends a target signal to at least one second device.

Wherein, the second device is a device that modulates the information to be sent on a target carrier provided by a device other than the second device for transmission.

It can be understood that for the implementation process of S310, in addition to referring to the relevant description in the method embodiment 200, as a possible implementation manner, the target signal may include at least one of the following (21)-(23).

(21) Radio frequency signal, the radio frequency signal is used to supply energy to at least one of the second devices, and/or the radio frequency signal is used to provide a target carrier to at least one of the second devices. Wherein, in the case where the radio frequency signal is used to power a target carrier to the at least one second device, the radio frequency signal includes a power supply signal waveform (such as cyclic prefix-orthogonal frequency division multiplexing (Cyclic prefix Orthogonal frequency division multiplexing) frequency division multiplex, CP-OFDM) waveform, orthogonal frequency division multiplexing (Discrete Fourier Transform Spread Orthogonal frequency division multiplex, DFT-S-OFDM) waveform based on discrete Fourier transform expansion, sine wave, square wave signal, chaos signal or other signal waveform), energy supply signal length (the unit can be time slot, symbol, etc.), energy supply signal frequency information (such as center frequency band, bandwidth, etc.), energy supply signal power information.

In the case where the radio frequency signal is used to provide a target carrier to the at least one second device, the radio frequency signal includes a target carrier waveform (such as a CP-OFDM waveform, a DFT-S-OFDM waveform, At least one of the following: sine wave, square wave signal, chaotic signal or other signal waveform), target carrier length (the unit can be time slot, symbol, etc.), target carrier frequency information, and target carrier power information.

(22) Synchronization signal, also called synchronization sequence, etc. Wherein, the synchronization signal includes at least one of the type of synchronization signal (such as m sequence, Gold sequence, ZC sequence, Barker sequence, etc.), the length information of the synchronization signal (the unit can be a time slot, a symbol, etc.) .

(23)Broadcast information. Wherein, the broadcast information at least includes the group identification (ID) of the BSC group, the type of equipment allowed to access the BSC group, the corresponding backscattered signal transmission parameters when the BSC equipment sends a response signal, the BSC equipment sends a response The signal is at least one item of the corresponding backscattered scheduling indication information. The group identifier of the BSC group is used to tell the second device the identifier (Identifier, ID) information of the BSC group where the second device is located.

The type of equipment allowed to access the BSC group can be understood as the type of BSC equipment allowed to access, such as equipment identification information type, sensor data type, location information type, equipment type, capability information (such as passive , semi-passive, active), etc.

The corresponding backscattered signal transmission parameters when the BSC device sends a response signal may include: synchronization signal parameters, backscattered signal transmission parameters, etc.

Based on this, considering that radio frequency signals, synchronization signals and broadcast information can be designed in a unified way or independently, there can be multiple combinations when transmitting target signals, such as radio frequency signals, synchronization signals, broadcast information included in the target signal. Information can be sent via the same signal or via different signals to accommodate different BSC needs. It is worth noting that in this embodiment, the BSC device (or the second device) may be a passive device or a semi-passive device, and the energy source may be solar energy, thermal energy, radio frequency energy, etc., but the BSC device mainly uses the first A device that provides backscatter energy to the target carrier provided by the device. It can be understood that the target carrier itself can also be used as the energy supply signal. The method of sending the target signal will be described below with reference to Example 1 to Example 5. The content is as follows.

Example 1

The target signal includes radio frequency signal, synchronization signal and broadcast information. That is to say, the radio frequency signal, synchronization signal, and broadcast information in the target signal are sent through the same signal. Among them, as shown in Figure 4a, the radio frequency signal is used to provide the target carrier and energy supply to the second device, the synchronization signal is used to synchronize the second device with the first device, and the broadcast information is used to carry the broadcast related to the group to which the first device belongs. Information etc. After the radio frequency signal is powered, there is no need to send other power supply signals in the middle to power the second device, and the radio frequency signal is followed by the synchronization signal and the broadcast signal, which is beneficial to the synchronization stability and demodulation performance of the second device. Higher requirements. Therefore, the target signal transmission method provided in Example 1 is suitable for the second device (ie, BSC device) with strong device capabilities, high energy conversion efficiency, and stable crystal oscillator.

Example 2

The target signal includes a first signal and a second signal. The first signal includes a radio frequency signal and a synchronization signal. The second signal includes the broadcast information. The sending time of the first signal is earlier than the second signal.

In other words, Example 2 adopts a design in which radio frequency signals, synchronization signals and broadcast information are decoupled. As shown in Figure 4b, the radio frequency signal and the synchronization signal can be carried together in the first signal, and as an optional implementation, the first signal can also carry a signal for triggering the second device to receive the second signal. Triggering the broadcast reception signal is used to trigger the second device to receive the second signal.

Based on this, after sending the first signal, the first device may wait for a fixed time before sending the broadcast information carried in the second signal. This design can put public radio frequency signals and synchronization signals together, and carry broadcast information separately, making the design of broadcast information more flexible. In addition, there is a time interval between the first signal and the second signal, which allows the second device to have more time for synchronization and signal analysis; but it also means that the second device requires higher energy conversion efficiency or energy storage capacity. . Based on this, the target signal design method provided in Example 2 is suitable for semi-passive BSC or BSC equipment with high energy conversion efficiency and stable crystal oscillator for synchronization.

Example 3

The target signal includes a third signal and a fourth signal, the third signal includes a radio frequency signal and a synchronization signal, the fourth signal includes a radio frequency signal and the broadcast information, and the sending time of the third signal is earlier than the Describe the fourth signal. Optionally, in the case where the third signal includes a trigger broadcast reception signal, the trigger broadcast reception signal is used to trigger the second device to receive the fourth signal.

As shown in Figure 4c, Example 3 is similar to Example 2, except that a radio frequency signal is added in front of the fourth signal (corresponding to the second signal in Example 2) to better support the second device for storage. Capable of subsequent information demodulation and backscatter modulation. In other words, the target signal design method in Example 3 is suitable for BSC equipment that is passive or has low energy conversion efficiency, but the synchronous crystal oscillator is stable.

Example 4

The target signal includes a fifth signal and a sixth signal. The fifth signal includes a radio frequency signal and a synchronization signal. The sixth signal includes a synchronization signal and the broadcast information. The sending time of the fifth signal is earlier than the Describe the sixth signal. Optionally, in the case where the fifth signal includes a trigger broadcast reception signal, the trigger broadcast reception signal is used to trigger the second device to receive the sixth signal.

As shown in Figure 4d, Example 4 is similar to Example 2, except that a synchronization signal is added to the sixth signal (corresponding to the second signal in Example 2) where the broadcast information is located, thereby supporting BSC equipment implementation Better synchronization. The synchronization in the fifth signal is to enable the second device to receive the trigger broadcast reception signal.

Based on this, the target signal design method in Example 4 is suitable for semi-passive or second devices with high energy conversion efficiency but poor synchronization crystal oscillator performance, so synchronization signals need to be sent regularly for synchronization.

Example 5

The target signal includes a seventh signal and an eighth signal. The seventh signal includes a radio frequency signal. The eighth signal includes a synchronization signal and the broadcast information. The sending time of the seventh signal is earlier than the eighth signal. Signal.

As shown in Figure 4e, the radio frequency signal is carried alone in the seventh signal, and the synchronization signal and broadcast information are jointly carried in the eighth signal. This design method is suitable for long energy storage time or weak energy conversion efficiency. second device; and decoupling BSC communication-related signals from radio frequency signals can reduce the processing complexity of the first device and reserve more time to support the generation of radio frequency signals (such as carrier/excitation signals) and synchronization signals.

requires attention. The design method of the aforementioned target signal may be, but is not limited to, what is shown in the aforementioned Example 1 to Example 5. For example, the order of each information in the broadcast information may be different from that in the aforementioned Example 1 to Example 5.

Further, for the description of the aforementioned target signal, the first device may determine based on the acquired target configuration information, which is a configuration related to the BSC communication capability. In addition, the first device may also perform backscatter communication with at least one of the second devices according to the target configuration information.

In a possible implementation manner, the first device may acquire the target configuration information in multiple ways. The acquisition process of the target configuration information will be described below in combination with Mode 1 and Mode 2, as follows.

Method 1: When the first device is in a Radio Resource Control (RRC) connected state or an activated state, the first device obtains the target configuration information through target signaling. That is to say, the network side device (such as the base station) can send the target configuration information to the first device in the form of target signaling. Then, the first device receives the target signaling sent by the network side device, and the target signaling The command carries the target configuration information.

In this embodiment, the target signaling may include any one of the following (31)-(34).

(31) First RRC signaling; wherein the first RRC signaling may be newly introduced dedicated RRC signaling to notify and activate the target configuration information to the first device. Of course, once the first device receives the company's first RRC signaling, the first device does not need to receive the downlink control information (Downlink Control Information) in the physical downlink control channel (Physical downlink control channel, PDCCH). DCI) scheduling information.

(32) Second RRC signaling and first DCI. The second RRC signaling is semi-static signaling. The first DCI is used to activate or deactivate the target configuration information configured in the second RRC signaling. . In other words, the network side device (such as a base station) may first configure the target configuration information through the second RRC signaling, and then activate or deactivate the corresponding configuration in the target configuration information through the first DCI.

(33) Second DCI, the second DCI is the scheduling signaling in the PDCCH, used to dynamically schedule the configuration information related to the first device and the BSC; wherein the second DCI can be newly introduced or defined DCI format (format), used to indicate that the first device is used for BSC communication scheduling.

(34) First Media Access Control Control Element (MAC CE) signaling. That is, the network side device (such as a base station) indicates the target configuration information of the first device through the first MAC CE. For example, a BSC command (Command) MAC CE can be defined.

Method 2: When the first device has no network connection or coverage, the first device The device independently determines the target configuration information based on the preconfigured BSC-related configuration information.

The preconfigured BSC-related configuration information may be preconfigured by the network side device to the first device through RRC signaling when the first device is in the RRC connected state or active state, so that the first device is in the wireless state. In the case of network connection or coverage, the target configuration information is determined independently based on the preconfigured BSC-related configuration information.

Alternatively, the preconfigured BSC-related configuration information may also be preconfigured in the first device in a factory default manner, so that the first device can use the preconfigured configuration information when there is no network connection or coverage. BSC related configuration information, and independently determine the target configuration information.

Of course, the preconfigured BSC-related configuration information may be configured in a manner but is not limited to the two mentioned above.

S320: The first device receives the response signal sent by the third device.

Wherein, the response signal is determined by the third device according to the target signal, that is, when the type of the third device matches the type of device allowed to access the BSC group in the target signal sent by the first device, the response signal is determined by the third device according to the target signal. The response signal is used to feed back to the first device that the third device can join the BSC group, and the third device belongs to the at least one second device.

It can be understood that for the implementation process of S320, in addition to referring to the relevant description in the method embodiment 200, as a possible implementation manner, assuming that the target signal includes a radio frequency signal, a synchronization signal and broadcast information, then the third The process of the device confirming to join the BSC group may include the following (41)-(43).

(41) The third device stores energy according to the radio frequency signal in the target signal.

(42) Synchronize according to the synchronization signal in the target signal.

(43) The third device parses the broadcast information in the target signal to obtain the type of device allowed to access the BSC group; The type of device determines whether to join the BSC group.

Of course, in order for the first device to identify the third device, the response signal may carry identification information of the third device or other information capable of identifying the identity of the third device.

It should be noted that the response signal may be of a unified design, that is, if there are multiple third devices sending response signals, then the format of the response signals sent by different third devices is unified, and the response signals carry the third Device identification information for the device. Alternatively, the response signal may also be a signal specific to the BSC device. For example, the response signal may be a signal scrambled by the identification information of the third device.

In addition, when the third device determines to join the BSC group, it can send a response signal based on the scheduling parameters indicated by the backscattered scheduling indication information corresponding to when the BSC device sends the response signal in the broadcast information to ensure that the first device Ability to parse response signals sent by third devices.

S330: When the first device determines that the third device is allowed to join the BSC group, the first device sends a confirmation signal to the third device.

Wherein, the confirmation signal is used to notify the third device to successfully join the BSC group. True nature In an embodiment, the process by which the first device determines that the third device is allowed to join the BSC group may include: if at least one of the following (51)-(53) is satisfied, the first device determines that the third device is allowed to join the BSC group. The device determines that the third device is allowed to join the BSC group.

(51) The signal quality of the response signal sent by the third device received by the first device is not less than the first threshold. Wherein, the signal quality of the response signal can be based on signal-to-noise ratio (SNR), signal-to-noise and interference ratio (SINR), reference signal received power (reference signal received power, RSRP), reference signal received quality (RSRQ), reference signal received quality (RSRQ) at least one or more are evaluated.

(52) The number of response signals received by the first device is not greater than the second threshold.

Wherein, considering that the first device sends a target signal to at least one second device, then the first device can receive multiple response signals from multiple third devices, then, for each third device, The first device may evaluate whether to allow it to join the BSC group based on the total number of received response signals. If the number of response signals is less than the maximum number of allowed accesses, it is determined to be allowed to join the BSC group; otherwise, it is not allowed.

(53) The distance between the third device and the first device is not greater than a third threshold.

It can be understood that the first device uses which conditions in (51)-(53) to determine, which can be implemented by protocol agreement, high-level configuration or network-side configuration, and is not limited here.

Further, in an implementation manner, when the first device sends a confirmation signal to the third device, the first device may send the confirmation signal to the third device in a broadcast or multicast manner, wherein the confirmation signal including the identification information of the third device; the confirmation signal may also be sent to the third device in a unicast manner, wherein the confirmation signal is scrambled according to the identification information of the third device get.

Correspondingly, after receiving the confirmation signal, the third device confirms that it has successfully joined the BSC group; otherwise, it determines that it has failed to join the BSC group.

The solution of the present invention is mainly aimed at the deployment scenario in which the first device independently performs group management on the BSC device. By designing the signaling process and message format between the first device and the BSC device, it supports the first device to handle different business types and energy storage. BSC equipment with wireless capabilities can perform effective group access and control management, thereby enabling the first equipment to conduct large-scale and centralized management of BSC equipment, effectively improving the transmission efficiency of the BSC network and saving deployment costs.

As shown in Figure 5, it is a schematic flow chart of a method for reverse scattered device communication provided by an exemplary embodiment of the present application. This method can be, but is not limited to, executed by a third device, such as a terminal or a network-side device. Specifically, it can be installed on Hardware and/or software execution in the third device. In this embodiment, the method may include at least the following steps.

S510. The third device receives the target signal sent by the first device.

S520: The third device determines to join the BSC group indicated by the target signal (that is, the type of the third device and the target signal sent by the first device allow access to the BSC group. If the device types match), send a response signal to the first device, wherein the third device modulates the information to be sent on a target carrier provided by another device except the second device. equipment.

Optionally, the response signal carries identification information of the third device.

Optionally, the target signal includes at least one of a radio frequency signal, a synchronization signal, and broadcast information; wherein the radio frequency signal is used to supply energy to at least one second device, and/or the radio frequency signal is used to A target carrier is provided to the at least one second device to which the third device belongs.

Optionally, the target signal includes a radio frequency signal, a synchronization signal and broadcast information; or, the target signal includes a first signal and a second signal, the first signal includes a radio frequency signal and a synchronization signal, and the second signal Including the broadcast information, the sending time of the first signal is earlier than the second signal; or, the target signal includes a third signal and a fourth signal, the third signal includes a radio frequency signal and a synchronization signal, so The fourth signal includes a radio frequency signal and the broadcast information, and the sending time of the third signal is earlier than the fourth signal; or the target signal includes a fifth signal and a sixth signal, and the fifth signal includes Radio frequency signal and synchronization signal, the sixth signal includes a synchronization signal and the broadcast information, the sending time of the fifth signal is earlier than the sixth signal; or the target signal includes a seventh signal and an eighth signal , the seventh signal includes a radio frequency signal, the eighth signal includes a synchronization signal and the broadcast information, and the sending time of the seventh signal is earlier than the eighth signal.

Optionally, the first signal, the third signal, and the fifth signal may also include a trigger broadcast reception signal; wherein, in the case where the first signal includes a trigger broadcast reception signal, the trigger broadcast reception The signal is used to trigger the second device to receive a second signal; in the case where the third signal includes a trigger broadcast reception signal, the trigger broadcast reception signal is used to trigger the second device to receive a fourth signal; where When the fifth signal includes a trigger broadcast reception signal, the trigger broadcast reception signal is used to trigger the second device to receive the sixth signal.

Optionally, when the radio frequency signal is used to supply target carrier energy to the at least one second device, the radio frequency signal includes the energy supply signal waveform, the energy supply signal length, the energy supply signal frequency information, the energy supply signal frequency information, and the energy supply signal waveform. capable of at least one item of signal power information; in the case where the radio frequency signal is used to provide a target carrier to the at least one second device, the radio frequency signal includes target carrier waveform, target carrier length, target carrier frequency information, At least one item of target carrier power information.

Optionally, the synchronization signal includes at least one of a type of synchronization signal and length information of the synchronization signal.

Optionally, the broadcast information at least includes the group identifier of the BSC group, the device type allowed to access the BSC group, the corresponding backscattered signal transmission parameters when the BSC device sends a response signal, and the BSC device sends a response signal. at least one item of the corresponding backscattering scheduling indication information.

Optionally, when the third device determines to join the BSC group indicated by the broadcast information, the step of sending a response signal to the first device includes: the third device sends a response signal to the first device according to the target information. The radio frequency signal in the signal is stored and synchronized according to the synchronization signal in the target signal; the third device parses the broadcast information in the target signal to obtain the information of the device allowed to access the BSC group. Type; when the third device determines to join the BSC group based on the type of the device that is allowed to access the BSC group, it sends a response signal to the first device.

Optionally, the step of sending a response signal to the first device includes: backscattering the response signal to the first device according to the signal transmission parameters corresponding to when the second device sends the response signal included in the broadcast information. .

Optionally, after the step of sending a response signal to the first device, the method further includes: the third device receiving a confirmation signal sent by the first device, the confirmation signal being used to notify the third device of success. Join the BSC group.

It can be understood that since the method embodiment 500 has the same or corresponding technical features as the method embodiments 200-300, the implementation process of each implementation manner in the method embodiment 500 can refer to the relevant descriptions in the method embodiments 200-300. and achieve the same or corresponding technical effects. To avoid duplication, they will not be described again here.

For the backscatter communication method 200-500 provided by the embodiment of the present application, the execution subject may be a backscatter communication device. In the embodiment of the present application, the method of performing backscatter communication by a backscatter communication device is taken as an example to illustrate the backscatter communication device provided by the embodiment of the present application.

As shown in Figure 6, it is a schematic structural diagram of a backscatter communication device 600 provided by an exemplary embodiment of the present application. The device 600 includes: a first sending module 610, configured to send a target signal to at least one second device, Wherein, the second device is a device that modulates the information to be sent on a target carrier provided by a device other than the second device; the first receiving module 620 is used to receive the information sent by the third device. A response signal, the response signal is determined by the third device according to the target signal, the response signal is used to feed back to the first device that the third device can join the BSC group, the third device Belongs to the at least one second device.

Optionally, the response signal carries identification information of the third device.

Optionally, the target signal includes at least one of a radio frequency signal, a synchronization signal, and broadcast information; wherein the radio frequency signal is used to supply energy to the at least one second device, and/or the radio frequency signal Used to provide the target carrier to the at least one second device.

Optionally, the target signal includes a radio frequency signal, a synchronization signal and broadcast information; or, the target signal includes a first signal and a second signal, the first signal includes a radio frequency signal and a synchronization signal, and the second signal Including the broadcast information, the sending time of the first signal is earlier than the second signal; or, the target signal includes a third signal and a fourth signal, the third signal includes a radio frequency signal and a synchronization signal, so The fourth signal includes a radio frequency signal and the broadcast information, and the sending time of the third signal is earlier than the fourth signal; or the target signal includes a fifth signal and a sixth signal, and the fifth signal includes Radio frequency signal and synchronization signal, the sixth signal includes a synchronization signal and the broadcast information, the sending time of the fifth signal is earlier than the sixth signal; or the target signal includes a seventh signal and an eighth signal , the seventh signal includes a radio frequency signal, and the eighth signal The signal includes a synchronization signal and the broadcast information, and the sending time of the seventh signal is earlier than the eighth signal.

Optionally, when the radio frequency signal is used to supply target carrier energy to the at least one second device, the radio frequency signal includes the energy supply signal waveform, the energy supply signal length, the energy supply signal frequency information, the energy supply signal frequency information, and the energy supply signal waveform. capable of at least one item of signal power information; in the case where the radio frequency signal is used to provide a target carrier to the at least one second device, the radio frequency signal includes target carrier waveform, target carrier length, target carrier frequency information, At least one item of target carrier power information.

Optionally, the synchronization signal includes at least one of a type of synchronization signal and length information of the synchronization signal.

Optionally, the broadcast information at least includes the group identifier of the BSC group, the device type allowed to access the BSC group, the corresponding backscattered signal transmission parameters when the BSC device sends a response signal, and the BSC device sends a response signal. at least one item of the corresponding backscattering scheduling indication information.

Optionally, the first signal, the third signal, and the fifth signal may also include a trigger broadcast reception signal; wherein, in the case where the first signal includes a trigger broadcast reception signal, the trigger broadcast reception The signal is used to trigger the second device to receive the second signal; in the case where the third signal includes a trigger broadcast reception signal, the trigger broadcast reception signal is used to trigger the second device to receive the fourth signal. signal; in the case where the fifth signal includes a trigger broadcast reception signal, the trigger broadcast reception signal is used to trigger the second device to receive the sixth signal.

Optionally, the first sending module 610 is also configured to send a confirmation signal to the third device when it is determined that the third device is allowed to join the BSC group. The confirmation signal is used to notify the third device. The third device successfully joins the BSC group.

Optionally, the step of the first sending module 610 sending a confirmation signal to the third device includes any of the following: sending the confirmation signal to the third device in a broadcast or multicast manner, wherein , the confirmation signal includes the identification information of the third device; and sends the confirmation signal to the third device in a unicast manner, wherein the confirmation signal is based on the identification information of the third device. Obtained by scrambling.

Optionally, the step of the first sending module 610 determining that the third device is allowed to join the BSC group includes: determining that the third device is allowed to join the BSC group if at least one of the following is satisfied: BSC group: the signal quality of the response signal sent by the third device received by the first device is not less than the first threshold; the number of response signals received by the first device is not greater than the second threshold; the third The distance between the third device and the first device is not greater than the third threshold.

Optionally, the apparatus 600 further includes an acquisition module for acquiring target configuration information, where the target configuration information is a configuration related to the BSC communication capability; the first device determines according to the target configuration information The target signal, and/or the first device performs BSC communication with at least one of the second devices according to the target configuration information.

Optionally, the step of obtaining the target configuration information by the obtaining module includes: when the first device is in the radio resource control RRC connected state or activated state, the first device passes the target Signaling obtains the target configuration information; when the first device is without network connection or coverage, the first device independently determines the target configuration information based on preconfigured BSC communication-related configuration information.

Optionally, the step of the acquisition module obtaining target configuration information through target signaling includes: the first device receives target signaling sent by a network side device, and the target signaling carries the target configuration information; Wherein, the target signaling includes at least one of the following: first radio resource control RRC signaling; second RRC signaling and first downlink control information DCI, and the second RRC signaling is semi-static signaling, so The first DCI is used to activate or deactivate the target configuration information configured by the second RRC signaling; the second DCI is the scheduling signaling in the physical downlink control channel PDCCH and is used to dynamically schedule the third DCI. Configuration information related to communication between a device and the BSC; first media access control unit MAC CE signaling.

Optionally, the first device has at least one of the following: radio frequency power supply capability; the ability to send BSC control commands; the wireless capability to support BSC signal reception/transmission; and the ability to provide a target carrier.

As shown in Figure 7, a schematic structural diagram of a backscatter communication device 700 is provided for an exemplary implementation of the present application. The device 700 includes a second receiving module 710 for receiving the target signal sent by the first device; Module 720 is configured to send a response signal to the first device in a backscattering manner when it is determined to join the BSC group indicated by the target signal.

Optionally, the response signal carries identification information of the third device.

Optionally, the target signal includes at least one of a radio frequency signal, a synchronization signal, and broadcast information; wherein the radio frequency signal is used to supply energy to at least one second device, and/or the radio frequency signal is used to A target carrier is provided to the at least one second device to which the third device belongs.

Optionally, the target signal includes a radio frequency signal, a synchronization signal and broadcast information; or, the target signal includes a first signal and a second signal, the first signal includes a radio frequency signal and a synchronization signal, and the second signal Including the broadcast information, the sending time of the first signal is earlier than the second signal; or, the target signal includes a third signal and a fourth signal, the third signal includes a radio frequency signal and a synchronization signal, so The fourth signal includes a radio frequency signal and the broadcast information, and the sending time of the third signal is earlier than the fourth signal; or the target signal includes a fifth signal and a sixth signal, and the fifth signal includes Radio frequency signal and synchronization signal, the sixth signal includes a synchronization signal and the broadcast information, the sending time of the fifth signal is earlier than the sixth signal; or the target signal includes a seventh signal and an eighth signal , the seventh signal includes a radio frequency signal, the eighth signal includes a synchronization signal and the broadcast information, and the sending time of the seventh signal is earlier than the eighth signal.

Optionally, the first signal, the third signal, and the fifth signal may also include a trigger broadcast reception signal; wherein, in the case where the first signal includes a trigger broadcast reception signal, the trigger broadcast reception The signal is used to trigger the second device to receive the second signal; in the case where the third signal includes a trigger broadcast reception signal, the trigger broadcast reception signal is used to trigger the second device. The device is equipped to receive a fourth signal; in the case where the fifth signal includes a trigger broadcast reception signal, the trigger broadcast reception signal is used to trigger the second device to receive a sixth signal.

Optionally, when the radio frequency signal is used to supply target carrier energy to the at least one second device, the radio frequency signal includes the energy supply signal waveform, the energy supply signal length, the energy supply signal frequency information, the energy supply signal frequency information, and the energy supply signal waveform. capable of at least one item of signal power information; in the case where the radio frequency signal is used to provide a target carrier to the at least one second device, the radio frequency signal includes target carrier waveform, target carrier length, target carrier frequency information, At least one item of target carrier power information.

Optionally, the synchronization signal includes at least one of a type of synchronization signal and length information of the synchronization signal.

Optionally, the broadcast information at least includes the group identifier of the BSC group, the device type allowed to access the BSC group, the corresponding backscattered signal transmission parameters when the BSC device sends a response signal, and the BSC device sends a response signal. at least one item of the corresponding backscattering scheduling indication information.

Optionally, when the second sending module 720 determines to join the BSC group indicated by the broadcast information, the step of sending a response signal to the first device includes: the third device according to the target signal. The radio frequency signal stores energy and performs synchronization according to the synchronization signal in the target signal; the third device parses the broadcast information in the target signal to obtain the information of the second device allowed to access the BSC group. Type; when the third device determines to join the BSC group based on the type of the device that is allowed to access the BSC group, it sends a response signal to the first device.

Optionally, the step of the second sending module 720 sending the response signal to the first device includes: backscattering the response signal to the first device according to the corresponding signal transmission parameters when the BSC device sends the response signal included in the broadcast information. Describe the first device.

Optionally, the second receiving module 710 is configured to receive a confirmation signal sent by the first device, where the confirmation signal is used to notify the third device of successfully joining the BSC group.

The backscatter communication devices 600-700 in the embodiment of the present application may be terminals or network-side equipment, or may be components in terminals or network-side equipment. For example, the terminal may include, but is not limited to, the types of terminal 11 listed above, and the network side device may include, but is not limited to, the type of network side device 12 listed above, which are not specifically limited in this embodiment of the application.

The backscatter communication devices 600-700 provided by the embodiments of the present application can implement each process implemented by the method embodiments of Figures 2 to 5, and achieve the same technical effect. To avoid duplication, they will not be described again here.

Optionally, as shown in Figure 8, this embodiment of the present application also provides a communication device 800, including a processor 801 and a memory 802. The memory 802 stores programs or instructions that can be run on the processor 801, for example, When the communication device 800 is a terminal, when the program or instruction is executed by the processor 801, each step in the above method embodiments 200-500 is implemented, and the same technical effect can be achieved. When the communication device 800 is a network-side device, when the program or instruction is executed by the processor 801, each step in the above method embodiments 200-500 is implemented, and the same technical effect can be achieved. In order to avoid duplication, Again, I won’t go into details here.

Embodiments of the present application also provide a terminal, including a processor and a communication interface. The communication interface is coupled to the processor. The processor is used to run programs or instructions to implement the methods described in method embodiments 200-500. Method steps. This terminal embodiment corresponds to the above-mentioned terminal-side method embodiment. Each implementation process and implementation manner of the above-mentioned method embodiment can be applied to this terminal embodiment, and can achieve the same technical effect. Specifically, FIG. 9 is a schematic diagram of the hardware structure of a terminal that implements an embodiment of the present application.

The terminal 900 includes but is not limited to: a radio frequency unit 901, a network module 902, an audio output unit 903, an input unit 904, a sensor 905, a display unit 906, a user input unit 907, an interface unit 908, a memory 909, a processor 910, etc. at least some parts of it.

Those skilled in the art can understand that the terminal 900 may also include a power supply (such as a battery) that supplies power to various components. The power supply may be logically connected to the processor 910 through a power management system, thereby managing charging, discharging, and power consumption through the power management system. Management and other functions. The terminal structure shown in FIG. 9 does not constitute a limitation on the terminal. The terminal may include more or fewer components than shown in the figure, or may combine certain components, or arrange different components, which will not be described again here.

It should be understood that in the embodiment of the present application, the input unit 904 may include a graphics processor (Graphics Processing Unit, GPU) 9041 and a microphone 9042. The graphics processor 9041 is responsible for the image capture device (GPU) in the video capture mode or the image capture mode. Process the image data of still pictures or videos obtained by cameras (such as cameras). The display unit 906 may include a display panel 9061, which may be configured in the form of a liquid crystal display, an organic light emitting diode, or the like. The user input unit 907 includes a touch panel 9071 and at least one of other input devices 9072 . Touch panel 9071, also known as touch screen. The touch panel 9071 may include two parts: a touch detection device and a touch controller. Other input devices 9072 may include but are not limited to physical keyboards, function keys (such as volume control keys, switch keys, etc.), trackballs, mice, and joysticks, which will not be described again here.

In this embodiment of the present application, after receiving downlink data from the network side device, the radio frequency unit 901 can transmit it to the processor 910 for processing; in addition, the radio frequency unit 901 can send uplink data to the network side device. Generally, the radio frequency unit 901 includes, but is not limited to, an antenna, an amplifier, a transceiver, a coupler, a low noise amplifier, a duplexer, etc.

Memory 909 may be used to store software programs or instructions as well as various data. The memory 909 may mainly include a first storage area for storing programs or instructions and a second storage area for storing data, wherein the first storage area may store an operating system, an application program or instructions required for at least one function (such as a sound playback function, Image playback function, etc.) etc. Additionally, memory 909 may include volatile memory or nonvolatile memory, or memory 909 may include both volatile and nonvolatile memory. Among them, the non-volatile memory can be read-only memory (Read-Only Memory, ROM), programmable read-only memory (Programmable ROM, PROM), erasable programmable read-only memory (Erasable PROM, EPROM), electrically removable memory. Erase programmable read-only memory (Electrically EPROM, EEPROM) or flash memory. Volatile memory can be random access memory (Random Access memory) Memory, RAM), static random access memory (Static RAM, SRAM), dynamic random access memory (Dynamic RAM, DRAM), synchronous dynamic random access memory (Synchronous DRAM, SDRAM), double data rate synchronous dynamic random access memory Access memory (Double Data Rate SDRAM, DDRSDRAM), enhanced synchronous dynamic random access memory (Enhanced SDRAM, ESDRAM), synchronous link dynamic random access memory (Synch link DRAM, SLDRAM) and direct memory bus random access memory (Direct Rambus RAM, DRRAM). Memory 909 in embodiments of the present application includes, but is not limited to, these and any other suitable types of memory.

The processor 910 may include one or more processing units; optionally, the processor 910 integrates an application processor and a modem processor, where the application processor mainly handles operations related to the operating system, user interface, application programs, etc., Modem processors mainly process wireless communication signals, such as baseband processors. It can be understood that the above modem processor may not be integrated into the processor 910.

Among them, the radio frequency unit 901 is used to send a target signal to at least one second device, and is used to receive a response signal sent by a third device, wherein the second device modulates the information to be sent in addition to the second device. A device that transmits on a target carrier provided by other devices other than the device; the response signal is determined by the third device based on the target signal, and the response signal is used to feed back the third device to the first device. The device confirms that it can join the BSC group, and the third device belongs to the at least one second device.

Alternatively, the radio frequency unit 901 is configured to receive a target signal sent by the first device; and when it is determined to join the BSC group indicated by the target signal, send a response signal to the first device, wherein the third device is A device that performs transmission by modulating the information to be sent on a target carrier provided by a device other than the second device.

An embodiment of the present application also provides a network-side device, including a processor and a communication interface. The communication interface is coupled to the processor. The processor is used to run programs or instructions. The implementation is as described in Embodiments 200-500. steps of the method. This network-side device embodiment corresponds to the above-mentioned network-side device method embodiment. Each implementation process and implementation manner of the above-mentioned method embodiment can be applied to this network-side device embodiment, and can achieve the same technical effect.

Specifically, the embodiment of the present application also provides a network side device. As shown in Figure 10, the network side device 1000 includes: an antenna 1001, a radio frequency device 1002, a baseband device 1003, a processor 1004 and a memory 1005. Antenna 1001 is connected to radio frequency device 1002. In the uplink direction, the radio frequency device 1002 receives information through the antenna 1001 and sends the received information to the baseband device 1003 for processing. In the downlink direction, the baseband device 1003 processes the information to be sent and sends it to the radio frequency device 1002. The radio frequency device 1002 processes the received information and sends it out through the antenna 1001.

The method performed by the network side device in the above embodiment can be implemented in the baseband device 1003, which includes a baseband processor.

The baseband device 1003 may include, for example, at least one baseband board on which multiple chips are provided. As shown in FIG. 10 , one of the chips is, for example, a baseband processor, which communicates with the memory through a bus interface 1005 connection to call the program in the memory 1005 to perform the network device operations shown in the above method embodiment.

The network side device may also include a network interface 1006, which is, for example, a common public radio interface (CPRI).

Specifically, the network side device 1000 in this embodiment of the present invention also includes: instructions or programs stored in the memory 1005 and executable on the processor 1004. The processor 1004 calls the instructions or programs in the memory 1005 to execute Figure 6 or Figure 7 The execution methods of each module are shown and achieve the same technical effect. To avoid repetition, they will not be described in detail here.

Embodiments of the present application also provide a readable storage medium, with programs or instructions stored on the readable storage medium. When the program or instructions are executed by a processor, each process of the above-mentioned backscatter communication method embodiment is implemented, and can achieve the same technical effect, so to avoid repetition, we will not repeat them here.

Wherein, the processor is the processor in the terminal described in the above embodiment. The readable storage medium includes computer readable storage media, such as computer read-only memory ROM, random access memory RAM, magnetic disk or optical disk, etc.

An embodiment of the present application further provides a chip. The chip includes a processor and a communication interface. The communication interface is coupled to the processor. The processor is used to run network-side device programs or instructions to implement the above-mentioned backscatter. Each process of the communication method embodiment can achieve the same technical effect. To avoid duplication, it will not be described again here.

It should be understood that the chips mentioned in the embodiments of this application may also be called system-on-chip, system-on-a-chip, system-on-chip or system-on-chip, etc.

Embodiments of the present application also provide a computer program product. The computer program product includes a processor, a memory, and a program or instructions stored on the memory and executable on the processor. The program or instructions are used by the processor. When the processor is executed, each process of the above backscatter communication method embodiment is implemented, and the same technical effect can be achieved. To avoid repetition, the details will not be described here.

An embodiment of the present application also provides a backscatter communication system, including: a first device and a second device. The first device can be used to perform the steps of the backscatter communication method as described above. The third device Two devices may be used to perform the steps of the method of backscatter communication as described above.

It should be noted that, in this document, the terms "comprising", "comprises" or any other variations thereof are intended to cover a non-exclusive inclusion, such that a process, method, article or device that includes a series of elements not only includes those elements, It also includes other elements not expressly listed or inherent in the process, method, article or apparatus. Without further limitation, an element defined by the statement "comprises a..." does not exclude the presence of additional identical elements in a process, method, article or apparatus that includes that element. In addition, it should be pointed out that the scope of the methods and devices in the embodiments of the present application is not limited to performing functions in the order shown or discussed, but may also include performing functions in a substantially simultaneous manner or in reverse order according to the functions involved. Functions may be performed, for example, the methods described may be performed in an order different from that described, and various steps may be added, omitted, or combined. Additionally, features described with reference to certain examples may be used in other examples combination.

Through the above description of the embodiments, those skilled in the art can clearly understand that the methods of the above embodiments can be implemented by means of software plus the necessary general hardware platform. Of course, it can also be implemented by hardware, but in many cases the former is better. implementation. Based on this understanding, the technical solution of the present application can be embodied in the form of a computer software product that is essentially or contributes to the existing technology. The computer software product is stored in a storage medium (such as ROM/RAM, disk , CD), including several instructions to cause a terminal (which can be a mobile phone, computer, server, air conditioner, or network device, etc.) to execute the methods described in various embodiments of this application.

The embodiments of the present application have been described above in conjunction with the accompanying drawings. However, the present application is not limited to the above-mentioned specific implementations. The above-mentioned specific implementations are only illustrative and not restrictive. Those of ordinary skill in the art will Inspired by this application, many forms can be made without departing from the purpose of this application and the scope protected by the claims, all of which fall within the protection of this application.

Claims (30)

1. A method of backscatter communication, including:

   The first device sends a target signal to at least one second device, wherein the second device is a device that transmits the information to be sent by modulating it on a target carrier provided by a device other than the second device;

   The first device receives a response signal sent by the third device. The response signal is determined by the third device based on the target signal. The response signal is used to feed back to the first device that the third device can Joining the backscatter communication BSC group, the third device belongs to the at least one second device.
2. The method of claim 1, wherein the response signal carries identification information of the third device.
3. The method of claim 1, wherein the target signal includes at least one of a radio frequency signal, a synchronization signal, and broadcast information, wherein the radio frequency signal is used to power the at least one second device, and /Or, the radio frequency signal is used to provide a target carrier to the at least one second device.
4. The method of claim 3, wherein,

   The target signal includes radio frequency signal, synchronization signal and broadcast information;

   or,

   The target signal includes a first signal and a second signal. The first signal includes a radio frequency signal and a synchronization signal. The second signal includes the broadcast information. The sending time of the first signal is earlier than the second signal. Signal;

   or,

   The target signal includes a third signal and a fourth signal, the third signal includes a radio frequency signal and a synchronization signal, the fourth signal includes a radio frequency signal and the broadcast information, and the sending time of the third signal is earlier than the Describe the fourth signal;

   or,

   The target signal includes a fifth signal and a sixth signal, the fifth signal includes a radio frequency signal and a synchronization signal, the sixth signal includes a synchronization signal and the broadcast information, and the sending time of the fifth signal is earlier than the Describe the sixth signal;

   or,

   The target signal includes a seventh signal and an eighth signal. The seventh signal includes a radio frequency signal. The eighth signal includes a synchronization signal and the broadcast information. The sending time of the seventh signal is earlier than the eighth signal. Signal.
5. The method according to claim 3 or 4, wherein in the case where the radio frequency signal is used to power the target carrier to the at least one second device, the radio frequency signal includes an energy supply signal wave. At least one of the shape, energy supply signal length, energy supply signal frequency information, and energy supply signal power information;

   In the case where the radio frequency signal is used to provide a target carrier to the at least one second device, the radio frequency signal includes at least one of a target carrier waveform, a target carrier length, target carrier frequency information, and target carrier power information.
6. The method of claim 3 or 4, wherein the synchronization signal includes at least one of a type of synchronization signal and length information of the synchronization signal.
7. The method according to claim 3 or 4, wherein the broadcast information at least includes the group identifier of the BSC group, the type of equipment allowed to access the BSC group, and the corresponding backscattered value when the BSC equipment sends a response signal. At least one of the signal transmission parameters and the corresponding backscattered scheduling indication information when the BSC device sends a response signal.
8. The method of claim 4, wherein the first signal, the third signal, and the fifth signal may further include triggering a broadcast reception signal;

   Wherein, in the case where the first signal includes a trigger broadcast reception signal, the trigger broadcast reception signal is used to trigger the second device to receive the second signal;

   In the case where the third signal includes a trigger broadcast reception signal, the trigger broadcast reception signal is used to trigger the second device to receive the fourth signal;

   In the case where the fifth signal includes a trigger broadcast reception signal, the trigger broadcast reception signal is used to trigger the second device to receive the sixth signal.
9. The method according to any one of claims 1 to 8, wherein after the first device receives the response signal sent by the third device, the method further includes:

   When the first device determines that the third device is allowed to join the BSC group, the first device sends a confirmation signal to the third device. The confirmation signal is used to notify the third device of successfully joining the BSC. Group.
10. The method of claim 9, wherein the step of the first device sending a confirmation signal to the third device includes any of the following:

    Send the confirmation signal to the third device in a broadcast or multicast manner, wherein the confirmation signal includes identification information of the third device;

    The acknowledgment signal is sent to the third device in a unicast manner, where the acknowledgment signal is obtained by scrambling according to the identification information of the third device.
11. The method of claim 9, wherein the step of determining that the third device is allowed to join the BSC group includes:

    The first device determines that the third device is allowed to join the BSC group when at least one of the following is satisfied:

    The signal quality of the response signal sent by the third device received by the first device is not less than the first threshold;

    The number of response signals received by the first device is not greater than the second threshold;

    The distance between the third device and the first device is not greater than a third threshold.
12. The method of any one of claims 1-11, wherein the method further includes:

    The first device obtains target configuration information, where the target configuration information is a configuration related to the BSC communication capability;

    The first device determines the target signal according to the target configuration information, and/or the first device performs BSC with at least one of the second devices according to the target configuration information.
13. The method of claim 12, wherein the step of the first device obtaining target configuration information includes:

    When the first device is in the Radio Resource Control RRC connected state or active state, the first device obtains the target configuration information through target signaling;

    When the first device has no network connection or coverage, the first device independently determines the target configuration information based on preconfigured BSC communication-related configuration information.
14. The method of claim 13, wherein the step of the first device obtaining target configuration information through target signaling includes:

    The first device receives target signaling sent by a network side device, where the target signaling carries the target configuration information;

    Wherein, the target signaling includes at least one of the following:

    First radio resource control RRC signaling;

    Second RRC signaling and first downlink control information DCI. The second RRC signaling is semi-static signaling. The first DCI is used to activate or deactivate the target configuration configured by the second RRC signaling. information;

    The second DCI is the scheduling signaling in the physical downlink control channel PDCCH, which is used to dynamically schedule the configuration information related to the communication between the first device and the BSC;

    First media access control unit MAC CE signaling.
15. The method according to any one of claims 1-14, wherein the first device is equipped with at least one of the following:

    RF power supply capability;

    The ability to send BSC control commands;

    Support wireless capability for BSC signal reception/transmission;

    Provides the ability to target carriers.
16. A method of backscatter communication, the method includes:

    The third device receives the target signal sent by the first device;

    When the third device determines to join the backscatter communication BSC group indicated by the target signal, it sends a response signal to the first device, wherein the third device transmits the response signal to the first device. A device for transmitting information modulated on a target carrier provided by a device other than the second device.
17. The method of claim 16, wherein the response signal carries identification information of the third device.
18. The method of claim 16, wherein the target signal includes at least one of a radio frequency signal, a synchronization signal, and broadcast information, wherein the radio frequency signal is used to power at least one second device, and/or , the radio frequency signal is used to provide a target carrier to the at least one second device, and the third device belongs to the at least one second device.
19. The method of claim 18, wherein,

    The target signal includes radio frequency signal, synchronization signal and broadcast information;

    or,

    The target signal includes a first signal and a second signal. The first signal includes a radio frequency signal and a synchronization signal. The second signal includes the broadcast information. The sending time of the first signal is earlier than the second signal. Signal;

    or,

    The target signal includes a third signal and a fourth signal, the third signal includes a radio frequency signal and a synchronization signal, the fourth signal includes a radio frequency signal and the broadcast information, and the sending time of the third signal is earlier than the Describe the fourth signal;

    or,

    The target signal includes a fifth signal and a sixth signal, the fifth signal includes a radio frequency signal and a synchronization signal, the sixth signal includes a synchronization signal and the broadcast information, and the sending time of the fifth signal is earlier than the Describe the sixth signal;

    or,

    The target signal includes a seventh signal and an eighth signal. The seventh signal includes a radio frequency signal. The eighth signal includes a synchronization signal and the broadcast information. The sending time of the seventh signal is earlier than the eighth signal. Signal.
20. The method of claim 19, wherein the first signal, the third signal, and the fifth signal may further include triggering a broadcast reception signal;

    Wherein, in the case where the first signal includes a trigger broadcast reception signal, the trigger broadcast reception signal is used to trigger the second device to receive the second signal;

    In the case where the third signal includes a trigger broadcast reception signal, the trigger broadcast reception signal is used to trigger the second device to receive a fourth signal;

    In the case where the fifth signal includes a trigger broadcast reception signal, the trigger broadcast reception signal is used to trigger the second device to receive a sixth signal.
21. The method according to any one of claims 18-20, wherein,

    In the case where the radio frequency signal is used to supply target carrier energy to the at least one second device, the radio frequency signal includes an energy supply signal waveform, an energy supply signal length, an energy supply signal frequency information, and an energy supply signal power information. at least one of;

    In the case where the radio frequency signal is used to provide a target carrier to the at least one second device, the radio frequency signal includes at least one of a target carrier waveform, a target carrier length, target carrier frequency information, and target carrier power information.
22. The method according to any one of claims 18 to 20, wherein the synchronization signal includes at least one of a type of synchronization signal and length information of the synchronization signal.
23. The method according to any one of claims 18 to 20, wherein the broadcast information at least includes the group identifier of the BSC group, the type of equipment allowed to access the BSC group, and the corresponding BSC device when sending a response signal. At least one of the backscattered signal transmission parameters and the backscattered scheduling indication information corresponding to when the BSC device sends a response signal.
24. The method of claim 23, wherein the step of sending a response signal to the first device when the third device determines to join the BSC group indicated by the broadcast information includes:

    The third device stores energy according to the radio frequency signal in the target signal, and performs synchronization according to the synchronization signal in the target signal;

    The third device parses the broadcast information in the target signal to obtain the type of device allowed to access the BSC group;

    When the third device determines to join the BSC group based on the type of the device allowed to access the BSC group, the third device sends a response signal to the first device.
25. The method of claim 24, wherein the step of sending a response signal to the first device includes:

    According to the corresponding signal transmission parameters when the second device sends a response signal included in the broadcast information, the response signal is backscattered to the first device.
26. The method according to any one of claims 17-25, wherein after the step of sending the response signal to the first device, the method further includes:

    The third device receives the confirmation signal sent by the first device, and the confirmation signal is used to notify the third device to successfully join the BSC group.
27. A device for backscatter communication, including:

    A first sending module configured to send a target signal to at least one second device, wherein the second device modulates the information to be sent on a target carrier provided by a device other than the second device. device of;

    The first receiving module is configured to receive a response signal sent by a third device. The response signal is determined by the third device based on the target signal. The response signal is used to feed back the third device to the first device. The device may join the backscatter communication BSC group, and the third device belongs to the at least one a second device.
28. A device for backscatter communication, including:

    a second receiving module, configured to receive the target signal sent by the first device;

    The second sending module is configured to send a response signal to the first device when it is determined to join the backscatter communication BSC group indicated by the target signal, wherein the third device modulates the information to be sent in A device for transmitting on a target carrier provided by a device other than the second device.
29. A device, including a processor and a memory, the memory storing a program or instructions executable on the processor, the program or instructions implementing any one of claims 1 to 15 when executed by the processor The steps of the backscatter communication method, or the steps of implementing the backscatter communication method according to any one of claims 16 to 26.
30. A readable storage medium on which a program or instructions are stored. When the program or instructions are executed by a processor, the method for backscatter communication as claimed in any one of claims 1 to 15 is implemented. Steps, or steps of implementing the method of backscatter communication according to any one of claims 16 to 26.