Signal transmission method and device, communication equipment and storage medium

Abstract

The invention discloses a signal transmission method and device, communication equipment and a storage medium, and belongs to the technical field of communication, and the signal transmission method comprises the steps that first communication equipment obtains perception demand information, and the perception demand information is perception information needed by a perception service initiator; the first communication equipment determines first information under the condition that the first condition is met, and the first information is used for indicating the second communication equipment to switch transmission configuration information; the first communication device sends the first information. Another signal transmission method provided by the embodiment of the invention comprises the following steps: switching transmission configuration information under the condition that the second communication equipment receives the first information or meets a second condition; and the second communication equipment sends the first signal based on the switched transmission configuration information.

Description

Technical Field

[0001] This application belongs to the field of communication technologies, and particularly relates to a signal transmission method, apparatus, communication device, and storage medium. Background Art

[0002] Backscatter Communication (BSC) refers to that a backscatter communication device uses radio frequency signals in other devices or the environment for signal modulation to transmit its own information. Backscatter communication devices have characteristics such as low cost, low power consumption, and small size, and can be widely applied to scenarios such as warehousing logistics, industrial manufacturing, smart cities, and smart homes, such as scenarios of goods inventory and tracking, personal item searching, vehicle positioning in parking lots, store positioning in shopping malls, and exhibition stand positioning in museums.

[0003] Installing a backscatter communication device on a sensing target or placing it beside the sensing target can assist a sensing node in sensing the sensing target. Backscatter communication devices include various types, such as passive devices, semi-passive devices, and active devices. Among them, passive devices or semi-passive devices can correspond to a passive transmission mode, and active devices can correspond to an active transmission mode. When a backscatter communication device assists in sensing, its sensing performance is related to the transmission parameters or transmission mode of the backscatter communication device. There is currently no clear solution on how to multiplex multiple capabilities or multiple transmission modes of a backscatter communication device to improve sensing performance and sensing reliability. Summary of the Invention

[0004] Embodiments of this application provide a signal transmission method, apparatus, communication device, and storage medium, which can improve sensing performance and sensing reliability.

[0005] In a first aspect, a signal transmission method is provided, including:

[0006] A first communication device obtains sensing requirement information, where the sensing requirement information is sensing information required by a sensing service initiator;

[0007] When the first communication device meets a first condition, it determines first information, where the first information is used to instruct a second communication device to switch transmission configuration information;

[0008] The first communication device sends the first information;

[0009] Wherein, the first condition includes at least one of the following:

[0010] The first signal sent by the second communication device is not detected within a first duration;

[0011] During N sensing measurements, the first signal is not detected, where N is greater than or equal to 1;

[0012] The interference measurement of the coexisting device of the second communication device is greater than or equal to a first threshold;

[0013] The sensing cascade channel quality of the second communication device participating in sensing is less than or equal to a second threshold;

[0014] The sensing index is less than or equal to a third threshold;

[0015] The measurement of the reference signal reported by the second communication device is less than or equal to a fourth threshold;

[0016] The insufficient energy information reported by the second communication device is received;

[0017] It is determined that the second communication device needs to adjust the transmission power according to the power headroom report;

[0018] The sensing requirement information changes;

[0019] The sensing parameter configuration information changes.

[0020] In a second aspect, a signal transmission method is provided, including:

[0021] The second communication device switches the transmission configuration information when receiving the first information or satisfying the second condition;

[0022] The second communication device sends a first signal based on the switched transmission configuration information;

[0023] Wherein, the second condition includes at least one of the following:

[0024] Control information is not received within a second duration;

[0025] The measurement of the reference signal is less than or equal to a fifth threshold;

[0026] The energy of the energy storage capacitor is less than or equal to a sixth threshold.

[0027] In a third aspect, a signal transmission device is provided, including:

[0028] An obtaining module, configured to obtain sensing requirement information, where the sensing requirement information is the sensing information required by a sensing service initiator;

[0029] A determining module, configured to determine first information when a first condition is satisfied, where the first information is used to instruct the second communication device to switch the transmission configuration information;

[0030] A first sending module, configured to send the first information;

[0031] Among them, the first condition includes at least one of the following:

[0032] The first signal sent by the second communication device is not detected within the first time period;

[0033] The first signal is not detected during N sensing measurements, where N is greater than or equal to 1;

[0034] The interference measurement of the coexisting device of the second communication device is greater than or equal to the first threshold;

[0035] The sensing cascade channel quality in which the second communication device participates in sensing is less than or equal to the second threshold;

[0036] The sensing index is less than or equal to the third threshold;

[0037] The measurement of the reference signal reported by the second communication device is less than or equal to the fourth threshold;

[0038] The insufficient energy information reported by the second communication device is received;

[0039] It is determined that the second communication device needs to adjust the transmission power according to the power headroom report;

[0040] The sensing demand information changes;

[0041] The sensing parameter configuration information changes.

[0042] In a fourth aspect, a signal transmission device is provided, including:

[0043] A switching module, configured to switch the transmission configuration information when receiving the first information or satisfying the second condition;

[0044] A second transmission module, configured to transmit a first signal based on the switched transmission configuration information;

[0045] Among them, the second condition includes at least one of the following:

[0046] Control information is not received within the second time period;

[0047] The measurement of the reference signal is less than or equal to the fifth threshold;

[0048] The energy of the energy storage capacitor is less than or equal to the sixth threshold.

[0049] In a fifth aspect, a communication device is provided, which includes a processor and a memory. The memory stores a program or instruction that can run on the processor. When the program or instruction is executed by the processor, the steps of the method described in the first aspect or the second aspect are implemented.

[0050] In a sixth aspect, a communication device is provided, including a processor and a communication interface, where the communication interface is coupled to the processor, and the processor is configured to run a program or instructions to implement the steps of the method as described in the first aspect or the second aspect.

[0051] In a sixth aspect, a readable storage medium is provided, where a program or instructions are stored on the readable storage medium, and when the program or instructions are executed by a processor, the steps of the method as described in the first aspect or the second aspect are implemented.

[0052] In a seventh aspect, a wireless communication system is provided, including: a first communication device and a second communication device, where the first communication device is configured to execute the steps of the method as described in the first aspect, and the second communication device is configured to execute the steps of the method as described in the second aspect.

[0053] In an eighth aspect, a chip is provided, where the chip includes a processor and a communication interface, the communication interface is coupled to the processor, and the processor is configured to run a program or instructions to implement the steps of the method as described in the first aspect or the second aspect.

[0054] In a ninth aspect, a computer program / program product is provided, where 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 steps of the method as described in the first aspect or the second aspect.

[0055] In an embodiment of the present application, after the first communication device obtains the sensing requirement information, when the first condition is satisfied, the first information is determined and sent, and the first information is used to instruct the second communication device to perform a handover of transmission configuration information. In this way, in the same sensing process, the second communication device can switch the transmission configuration information, so that the switched transmission configuration information is better adapted to the current sensing environment, which helps to improve the sensing performance and enhance the sensing reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0056] Figure 1 It is a block diagram of a wireless communication system applicable to an embodiment of the present application;

[0057] Figure 2 It is a schematic structural diagram of a backscatter communication device in the related art;

[0058] Figure 3 It is a schematic structural diagram of a reading and writing device in the related art;

[0059] Figure 4 It is a schematic diagram of a backscatter communication modulation principle in the related art;

[0060] Figure 5 It is a schematic diagram of the relationship between a reading and writing device and a backscatter communication device in the related art;

[0061] Figure 6 It is the first topological structure diagram of the backscatter communication system in the related art;

[0062] Figure 7 It is the second topological structure diagram of the backscatter communication system in the related art;

[0063] Figure 8 It is the third topological structure diagram of the backscatter communication system in the related art;

[0064] Figure 9 It is the fourth topological structure diagram of the backscatter communication system in the related art;

[0065] Figure 10 It is the fifth topological structure diagram of the backscatter communication system in the related art;

[0066] Figure 11 It is the schematic diagram of the first communication and sensing architecture in the related art;

[0067] Figure 12 It is the schematic diagram of the second communication and sensing architecture in the related art;

[0068] Figure 13 It is the schematic diagram of the third communication and sensing architecture in the related art;

[0069] Figure 14 It is the schematic diagram of the fourth communication and sensing architecture in the related art;

[0070] Figure 15 It is the implementation flowchart of a signal transmission method in the embodiments of the present application;

[0071] Figure 16 It is the implementation flowchart of another signal transmission method in the embodiments of the present application;

[0072] Figure 17 In the embodiments of the present application, it is related to Figure 15 The corresponding structural schematic diagram of the signal transmission device;

[0073] Figure 18 In the embodiments of the present application, it is related to Figure 16 The corresponding structural schematic diagram of the signal transmission device;

[0074] Figure 19 It is the structural schematic diagram of a communication device in the embodiments of the present application;

[0075] Figure 20 It is the structural schematic diagram of a terminal in the embodiments of the present application;

[0076] Figure 21 It is the structural schematic diagram of a network-side device in the embodiments of the present application. Detailed implementation manners

[0077] The following will clearly describe the technical solutions in the embodiments of the present application 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, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application fall within the scope of protection of the present application.

[0078] The terms "first", "second", etc. in the present application are used to distinguish similar objects, rather than to describe a specific order or sequence. It should be understood that such terms can be interchanged under appropriate circumstances so that the embodiments of the present application can be implemented in an order other than those illustrated or described herein, and the objects distinguished by "first" and "second" are usually of the same category, and the number of objects is not limited. For example, the first object can be one or multiple. In addition, "or" in the present application means at least one of the connected objects. For example, "A or B" covers three scenarios, namely, Scenario 1: including A and not including B; Scenario 2: including B and not including A; Scenario 3: including both A and B. The character " / " generally indicates an "or" relationship between the associated objects before and after.

[0079] The term "indication" in the present application can be either a direct indication (or an explicit indication) or an indirect indication (or an implicit indication). Among them, a direct indication can be understood as that the sender clearly informs the receiver of specific information, operations to be performed, or request results, etc. in the sent indication; an indirect indication can be understood as that the receiver determines the corresponding information according to the indication sent by the sender, or makes a judgment and determines the operations to be performed or request results, etc. according to the judgment result.

[0080] It should be noted that the technology described in the embodiments of this application is not limited to the Long Term Evolution (LTE) / LTE-Advanced (LTE-A) system, and can also be used in other wireless communication systems, such as 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), or other systems. The terms "system" and "network" in the embodiments of this application are often used interchangeably, and the described technology can be used not only in the systems and radio technologies mentioned above, but also in other systems and radio technologies. The following description describes the New Radio (NR) system for example purposes, and the NR terminology is used in most of the following descriptions, but these technologies can also be applied to systems other than the NR system, such as the 6th Generation (6G) communication system. th Generation, 6G) communication system.

[0081] Figure 1Block diagram of a wireless communication system to which embodiments of the present application can be applied. 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 personal computer, a laptop computer, a notebook computer, a personal digital assistant (PDA), a handheld computer, a netbook, an ultra-mobile personal computer (UMPC), a mobile internet device (MID), an augmented reality (AR), a virtual reality (VR) device, a robot, a wearable device, a flight vehicle, a vehicle user equipment (VUE), a shipborne device, a pedestrian user equipment (PUE), a smart home (home devices with wireless communication functions, such as refrigerators, TVs, washing machines, or furniture, etc.), a game console, a personal computer (PC), a teller machine, or a self-service machine, etc. Wearable devices include: smart watches, smart bracelets, smart earphones, smart glasses, smart jewelry (smart bracelets, smart bracelets, smart rings, smart necklaces, smart anklets, smart ankle chains, etc.), smart wristbands, smart clothing, etc. Among them, the vehicle user equipment can also be called a vehicle terminal, a vehicle controller, a vehicle module, a vehicle component, a vehicle chip, or a vehicle unit, etc. It should be noted that the specific type of the terminal 11 is not limited in the embodiments of the present application. The network-side device 12 can include an access network device or a core network device. Among them, the access network device can also be called a radio access network (RAN) device, a radio access network function, or a radio access network unit. The access network device can include a base station, a wireless local area network (WLAN) access point (AP), or a wireless fidelity (WiFi) node, etc.Among them, the base station can be referred to as Node B (NB), Evolved Node B (eNB), the next generation Node B (gNB), New Radio Node B (NR Node B), access point, Relay Base Station (RBS), Serving Base Station (SBS), Base Transceiver Station (BTS), radio base station, radio transceiver, Basic Service Set (BSS), Extended Service Set (ESS), home Node B (HNB), home evolved Node B, Transmission Reception Point (TRP), or some other suitable term in the art. 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 the embodiments of the present application, only the base station in the NR system is taken as an example for introduction, and the specific type of the base station is not limited.

[0082] For ease of understanding, the related technologies and concepts involved in the embodiments of the present application are introduced first.

[0083] I. Ultra-low power communication

[0084] The typical technologies of ultra-low power communication systems are Ambient Internet of Things (AIoT) technology or backscatter communication technology, and their terminal devices are called ultra-low power terminals, AIoT devices, or backscatter communication devices.

[0085] Among them, backscatter communication refers to that backscatter communication devices use radio frequency signals in other devices or the environment for signal modulation to transmit their own information.

[0086] Backscatter communication devices can include the following types:

[0087] One type is a passive device, such as the tag device in traditional Radio Frequency Identification (RFID), which belongs to passive Internet of Things (IoT) devices. This type of backscatter communication device does not have an energy storage capacitor or battery, or has a small-capacity energy storage capacitor, and relies on Radio Frequency (RF) signals for power supply. The received RF signal is the power supply signal for the rectifier. It does not have the ability to generate a carrier wave and has the lowest power consumption;

[0088] Another type is a semi-passive device. This type of backscatter communication device has an energy storage capacitor or battery and relies on non-RF signals for energy storage. Optionally, this type of backscatter communication device is configured with a Power Amplifier (PA), a Low Noise Amplifier (LNA), or other active devices, and its downlink reception or uplink reflection has a certain amplification ability. It does not have the ability to generate a carrier wave and has the second lowest power consumption;

[0089] Yet another type is an active device, such as an active tag. This type of backscatter communication device has the ability to actively transmit, is configured with an energy storage capacitor or battery, and relies on non-RF signals for power supply. It can send information to the reader device without relying on the reflection of the incident signal, has the ability to generate a carrier wave, and has the highest power consumption.

[0090] In a backscatter communication system, a backscatter communication device, such as a tag device, can receive control signals or carrier signals from a reader device, such as a reader, and modulate the data to be transmitted onto the carrier signal according to the instructions and send it out. Backscatter communication devices generally include passive devices or semi-passive devices, and can use RF signals from other devices or the environment for signal modulation to transmit their own information. That is, passive devices or semi-passive devices are devices that modulate and reflect based on downlink RF signals. For active devices, they can either generate their own carrier signals and modulate information based on the generated carrier signals, or, like passive devices or semi-passive devices, use RF signals from other devices or the environment for modulation.

[0091] Figure 2 It is a schematic diagram of the structure of a backscatter communication device, and its basic constituent modules and main functions include:

[0092] Antenna unit: for receiving incident RF signals, control signaling, and for transmitting modulated backscatter signals;

[0093] Energy Harvester module or Battery module: for the backscatter communication device to perform RF energy harvesting, or other energy harvesting, including but not limited to solar energy, kinetic energy, mechanical energy, thermal energy, etc. In addition to the energy harvesting module, a battery power supply module may also be included, in which case the backscatter communication device is a semi-passive device. The Energy Harvester module or Battery module powers all other modules in the device;

[0094] Micro-controller: for controlling baseband signal processing, energy storage or data scheduling status, switch switching, system synchronization, etc.;

[0095] Information Receiver module: for demodulating control signaling or data sent by the reader-writer device or other network nodes;

[0096] Channel Coding&Modulation Block: for performing channel coding and signal modulation under the control of the micro-controller, and for implementing modulation by selecting different load impedances through a selection switch under the control of the micro-controller;

[0097] Memory or sensing module: for storing the device's ID information, location information, or sensing data, etc.

[0098] In addition to the above typical constituent modules, the backscatter communication device can also integrate a tunnel diode amplifier module, a low-noise amplifier module, etc., for improving the receiving sensitivity and transmitting power of the backscatter communication device.

[0099] Figure 3 For the structural schematic diagram of the reader-writer device, in a traditional RFID system, the reader-writer device can be a reader or a transceiver, and its basic constituent modules and main functions include:

[0100] Antenna unit: for receiving modulated backscatter signals;

[0101] Backscatter signal detection module: It is used to detect the backscatter signals sent by the backscatter communication device, such as Amplitude Shift Keying (ASK) detection, Phase Shift Keying (PSK) detection, Frequency Shift Keying (FSK) detection, or Quadrature Amplitude Modulation (QAM) detection, etc. The detection process may include processes such as envelope averaging, threshold calculation, and comparison;

[0102] Demodulation&Decoder module: It is used to demodulate the detected signals to recover the original information stream, that is, the original data.

[0103] Figure 4 The following shows the schematic diagram of the backscatter communication modulation principle. The backscatter communication device controls the reflection coefficient Γ of the circuit by adjusting its internal impedance, thereby changing the amplitude, frequency, phase, etc. of the incident signal to achieve signal modulation.

[0104] The reflection coefficient of the signal can be characterized as:

[0105]

[0106] where Z0 is the antenna characteristic impedance and Z1 is the load impedance. Assuming the incident signal is S in (t), then the output signal is Therefore, by reasonably controlling the reflection coefficient (Γ T =Γ0, Γ T =Γ1, Γ T =Γ2, ……, Γ T =Γ n ), corresponding amplitude modulation, frequency modulation, or phase modulation can be achieved by using the channel coding and modulation module.

[0107] The controller can control the reflection coefficient according to the following relationship:

[0108] Symbol 0 corresponds to impedance 0;

[0109] Symbol 1 corresponds to impedance 1;

[0110] Symbol 2 corresponds to impedance 2;

[0111] ……

[0112] The symbol n corresponds to the impedance n.

[0113] II. Information transmission between a reader / writer device, such as a base station or a reader, and a backscatter communication device, such as a tag device, in a backscatter communication system

[0114] Such as Figure 5 As shown, the reader / writer device can send instructions of types such as Select, Inventory, and Access to the backscatter communication device, and the states on the backscatter communication device side can include Ready, Arbitrate, Reply, Acknowledged, Open, Secured, Killed, etc.

[0115] In the inventory mode, the reader / writer device selects a backscatter communication device. After sending a Query instruction, the backscatter communication device replies, that is, generates a 16-bit random number for the reader / writer device. Then the reader / writer device sends this random number sequence to the backscatter communication device through an ACK (Acknowledgment) instruction, and the backscatter communication device sends relevant data to the reader / writer device, such as Protocol Control (PC), Extended Protocol Control (XPC), Electronic Product Code (EPC), Packet Cyclic Redundancy Check (Packet CRC), etc. If the EPC is valid, the reader / writer device can send a QueryRep (Repeat Query) instruction or other commands. If the EPC is invalid, the reader / writer device can send a NAK (Negative Acknowledgment). The process from the reader / writer device sending a Query instruction to the reader / writer device receiving the relevant data sent by the backscatter communication device is the response process of a single backscatter communication device.

[0116] III. Sensing based on backscatter communication

[0117] Install the backscatter communication device on the sensing target or deploy it in the area near the sensing target. The receiving device (receiver) of the backscatter communication system can perform a series of operations such as detecting the backscatter signal of the backscatter communication device, signal classification, and sensing parameter estimation to achieve the purpose of sensing or integrated communication and sensing.

[0118] The sensing or integrated communication and sensing based on backscatter has the following advantages:

[0119] (1) Different backscatter communication devices are installed on or around different sensing targets respectively, enabling the sensing or integrated sensing and communication receiver to distinguish different sensing targets according to the different signal characteristics backscattered by different backscatter communication devices, and achieving accurate association between sensing targets and sensing data in multi-target sensing. In addition, the backscatter communication device can also obtain sensing target information, such as target type information, motion state information, internal sensor information, etc., and realize information interaction through backscatter communication, thereby achieving low-cost and low-power integrated sensing and communication;

[0120] (2) By integrating a power amplifier on the backscatter communication device or using multi-antenna beamforming design, the signal strength of the backscattered signal of the backscatter communication device can be enhanced, the sensing signal-to-noise ratio or communication signal-to-noise ratio can be improved, and thus the reliability of sensing or integrated sensing and communication can be enhanced. For the decoupled sensing of devices that do not use backscatter technology, the reflection characteristics of the sensing target are related to the size, material, shape, orientation, etc. of the sensing target, and its reflection characteristics are uncontrollable, while the sensing based on backscatter can solve this problem by flexibly controlling the antenna array gain of the backscatter communication device;

[0121] (3) For the sensing of weak signals in an interference environment, such as human respiration, object vibration, liquid droplet velocity monitoring, etc., the sensing based on backscatter has obvious advantages compared with the sensing not based on backscatter. By reasonably designing the signal processing flow, the amplification of weak signals and the effective suppression or elimination of environmental interference can be achieved, improving the sensitivity and anti-interference ability of the sensing system;

[0122] (4) Utilizing the characteristics of low cost, low power consumption, small size, and easy deployment of the backscatter communication device, by deploying multiple backscatter communication devices in the environment, such as near the sensing target, and performing joint sensing processing on the backscattered signals of multiple backscatter communication devices at different positions, the sensing range can be increased, that is, the physical sensing distance and physical angle range can be increased, and the sensing network density can be increased. In addition, the sensing signal-to-noise ratio can be improved, the sensing resolution can be improved, and the sensing error can be reduced.

[0123] Some common sensing services are shown in Table 1:

[0124]

[0125]

[0126] Table 1

[0127] IV. Backscatter Communication Positioning Technology

[0128] The backscatter communication device features low cost, low power consumption, and small size, and can be widely applied in scenarios such as warehousing logistics, industrial manufacturing, smart cities, and smart homes. For example, it can be used for goods inventory and tracking, personal item finding, vehicle positioning in parking lots, store positioning in shopping malls, and museum platform positioning. Table 2 takes the backscatter communication device as the tag device as an example, and shows the service types, index requirements, etc. involved in several typical positioning scenarios based on backscatter communication from different dimensions. The positioning types based on backscatter communication can be divided into tag device self-positioning and tag device assisted positioning. Among them, tag device self-positioning generally requires the tag device to be bound to an object, and the positioning of the object is achieved by positioning the tag device; tag device assisted positioning is generally based on the tag device to assist the positioning of other reading and writing devices. When positioning the tag device, the positioning device for calculation, coordination, and management can be a base station or an access point (AP), or other devices such as a terminal.

[0129]

[0130] Table 2

[0131] The measurement parameters required to support backscatter communication positioning include received signal strength (RSS), received signal strength indicator (RSSI), direction of arrival (DOA), phase information, time of arrival (TOA) or round-trip time (RTT), time difference of arrival (TDOA), arrival phase difference, etc.

[0132] Considering that the transmission power of the device is known, the RSS / RSSI parameters can be used to estimate the absolute distance between the reader-writer device and the tag device. However, this method has drawbacks such as being vulnerable to environmental interference and having low accuracy. The performance of the DOA-based estimation method is better than that of the RSS / RSSI method, but this method requires the reader-writer device to be configured with multiple receiving antennas, and the measured phase is susceptible to the influence of non-line-of-sight (NLOS) paths, environmental noise, etc. The TOA- or RTT-based estimation method needs to use the propagation time of the signal in the air interface to calculate the distance between the anchor device and the tag device. This method requires the transmitted signal to carry timestamps to assist in the measurement, and strict clock synchronization is required between the anchor device and the tag device. The TDOA-based estimation method locates by the difference in the propagation time of the measurement signals of multiple anchor devices, but the positioning accuracy is also affected by the clock synchronization error between different network devices.

[0133] Generally speaking, the current backscatter communication positioning methods are divided into distance-based methods and distance-independent methods. Among them, the distance-based methods include ranging, angle measurement, etc.; the distance-independent methods include fingerprint recognition and non-fingerprint recognition, etc. Table 3 summarizes several typical backscatter communication-based positioning methods with the backscatter communication device as the tag device. Since non-ideal factors such as the mobility of the tag device, the hardware capabilities of the transceiver devices, and the wireless channel environment will all affect the positioning accuracy of the tag device, when positioning the tag device by methods such as angle measurement, ranging, or non-fingerprint recognition, the influence of non-ideal factors such as the multipath environment, thermal noise, and synchronization error between different devices needs to be considered. For the tag device, the frequency deviation caused by poor crystal oscillator stability needs to be eliminated; for the receiving device, that is, the reader-writer device, the sampling timing error and sampling frequency error introduced by the hardware, as well as the phase shift introduced by thermal noise, need to be eliminated; in addition, the influence of the multipath effect caused by the superposition of the received phase due to the existence of line-of-sight (LOS) paths and NLOS paths in the environment also needs to be considered.

[0134]

[0135] Table 3

[0136] Limited by the hardware capabilities of the backscatter communication device and objective environmental factors such as strong signal attenuation and signal interference in the two-way channel, backscatter communication-based positioning generally has problems such as low positioning accuracy and poor stability. In addition, the mobility of the backscatter communication device is also a key factor affecting positioning accuracy and stability.

[0137] In addition to the measurement errors introduced by low signal-to-noise ratio (SNR) and the mobility of backscatter communication devices, the following technical difficulties also exist in the positioning technology based on backscatter communication:

[0138] (1) Non-ideal factors: The non-ideal factors of the backscatter communication system affect the positioning performance of backscatter communication devices. For example, for positioning based on TOA or TDOA, it is necessary to eliminate the carrier frequency offset (CFO) on the backscatter communication device side, the sampling time offset (STO) on the transceiver side, and the influence of CFO; while for positioning based on PDOA, the influence of CFO on the backscatter communication device side can be ignored, and issues such as the deterioration of phase measurement accuracy caused by STO and CFO on the transceiver side need to be focused on;

[0139] (2) Narrow channel bandwidth: Limited by the switching rate of the load impedance switch in the modulation circuit, the bandwidth of backscatter signals is usually small, which affects the positioning accuracy under ranging methods such as TOA, TDOA, and RTT;

[0140] (3) Few antennas: Limited by hardware cost, power consumption, and volume, backscatter communication devices do not integrate too many antennas, thus affecting the positioning accuracy under angle measurement methods such as AOA and DOA. Most related technologies use multiple antennas on the base station side to assist in measuring the incident angle of backscatter signals, but the robustness of this scheme is poor.

[0141] V. Network Architecture Based on Backscatter Communication

[0142] The network topology of the backscatter communication system is as Figures 6 to 10 shown.

[0143] Figure 6 The topology structure shown is also called the monostatic backscatter communication system (MBCS) architecture, that is, the monostatic architecture. The traditional RFID system is a typical MBCS. MBCS includes backscatter communication devices and reading and writing devices. Backscatter communication devices are such as tag devices, and reading and writing devices are such as base stations. In this architecture, the backscatter communication device directly communicates with the network-side device acting as a reading and writing device, such as a base station, and the network-side device may have a functional module with a frequency division duplexing (FDD) full-duplex architecture. In Figure 6In the topology shown, the device that sends control signaling to the backscatter communication device is the same device as the device that receives the backscatter signal, and the device that sends the RF carrier signal can be the same device as the aforementioned device or a different device.

[0144] In Figure 7 the topology shown, an intermediate node is deployed between the network-side device, such as a base station, and the backscatter communication device. The backscatter communication device communicates bidirectionally with the intermediate node, and the intermediate node communicates with the network-side device through the Uu interface of the air interface to transmit information between the network-side device and the backscatter communication device. The backscatter communication device receives the control signaling and carrier signal sent by the intermediate node, and the control signaling is indicated by the network-side device through the intermediate node. The intermediate node can be a terminal, a repeater, an Integrated Access Backhaul (IAB) node, etc. The intermediate node can also act as a relay to forward AIoT data to the network-side device.

[0145] In Figure 8 the topology shown, the backscatter communication device sends AIoT data / uplink signaling to the network-side device, such as a base station, and receives data / signaling from an assisting node; in Figure 9 the topology shown, the backscatter communication device receives data / signaling from the network-side device, such as a base station, and sends AIoT data / uplink signaling to the assisting node. In Figure 8 , Figure 9 the topology shown, the assisting node communicates with the network-side device through the Uu interface, and the assisting node can be an IAB, a terminal, a repeater, etc. Figure 8 , Figure 9 the topology shown can be called a Bistation Backscatter Communication System (BBCS) architecture, that is, a bistation architecture. Different from the MBCS system, the RF radio frequency source, the transmitting device of the backscatter communication system, and the receiving device of the backscatter communication system in the BBCS are all separate.

[0146] In Figure 10 the topology shown, the terminal acts as a reading and writing device to communicate bidirectionally with the backscatter communication device. This architecture also belongs to the MBCS architecture, but the difference is that the reading and writing device here is the terminal, rather than the network-side device.

[0147] VI. Sensing and communication architecture based on backscatter communication

[0148] Based on several network architectures of backscatter communication systems, different sensing architectures are given in the case of decoupling / coupling between backscatter communication devices and sensing targets. Among them, the first device is the initiator of sensing services with sensing requirements, and the sensing nodes are the nodes participating in sensing. Sensing node A and sensing node B can be devices such as base stations, terminals, dedicated readers, etc., and no specific distinction is made here. In addition, the radio frequency source device and the device for sending control signaling can also be intermediate nodes / auxiliary nodes such as repeaters, IABs, etc.

[0149] Figure 11 The shown communication and sensing architecture is a bistatic architecture with A transmitting and B receiving. This architecture considers the coupling between the backscatter communication device and the sensing target. The backscatter communication device receives the control signaling and carrier signal sent by sensing node A, and sends the uplink preamble and backscatter signal to sensing node B.

[0150] Figure 12 The shown communication and sensing architecture is a monostatic architecture with A transmitting and A receiving. This architecture considers the coupling between the backscatter communication device and the sensing target. The backscatter communication device receives the control signaling and carrier signal sent by sensing node A, and sends the uplink preamble and backscatter signal to sensing node A.

[0151] Figure 13 The shown communication and sensing architecture is a bistatic architecture with A transmitting and B receiving. This architecture considers the decoupling between the backscatter communication device and the sensing target. The backscatter communication device receives the control signaling and carrier signal CW1 sent by sensing node A, and receives the carrier signal CW2 reflected by the sensing target. Sensing node B receives the uplink preamble and backscatter signal sent by the backscatter communication device, and receives the signal reflected by the sensing target.

[0152] Figure 14 The shown communication and sensing architecture is a monostatic architecture with A transmitting and A receiving. This architecture considers the decoupling between the backscatter communication device and the sensing target. The backscatter communication device receives the control signaling, CW1 sent by sensing node A, and CW2 reflected by the sensing target, and sends the uplink preamble and backscatter signal to sensing node A. At the same time, the sensing target will also receive the uplink backscatter signal of the backscatter communication device and reflect this backscatter signal to sensing node A.

[0153] The relevant technologies and concepts related to the embodiments of the present application are introduced above. Next, in combination with the accompanying drawings, the signal transmission method provided by the embodiments of the present application will be described in detail through some embodiments and their application scenarios.

[0154] See Figure 15 As shown, it is the implementation flowchart of a signal transmission method provided by the embodiments of the present application. This method includes the following steps:

[0155] S1510: The first communication device obtains sensing requirement information;

[0156] The sensing requirement information is the sensing information required by the sensing service initiator;

[0157] S1520: When the first communication device meets the first condition, it determines first information, where the first information is used to instruct the second communication device to perform a handover of transmission configuration information;

[0158] S1530: The first communication device sends the first information;

[0159] Among them, the first condition includes at least one of the following:

[0160] The first signal sent by the second communication device is not detected within the first time period;

[0161] During N sensing measurement processes, the first signal is not detected, where N is greater than or equal to 1;

[0162] The interference measurement value of the coexisting device of the second communication device is greater than or equal to the first threshold;

[0163] The sensing cascade channel quality in which the second communication device participates in sensing is less than or equal to the second threshold;

[0164] The sensing index is less than or equal to the third threshold;

[0165] The measurement value of the reference signal reported by the second communication device is less than or equal to the fourth threshold;

[0166] An energy shortage message reported by the second communication device is received;

[0167] It is determined according to the power headroom report that the second communication device needs to adjust its transmission power;

[0168] The sensing requirement information changes;

[0169] The sensing parameter configuration information changes.

[0170] By applying the method provided in the embodiments of the present application, after the first communication device obtains the sensing requirement information, when the first condition is met, it determines and sends the first information, where the first information is used to instruct the second communication device to perform a handover of transmission configuration information, so that in the same sensing process, the second communication device can switch the transmission configuration information, making the switched transmission configuration information better applicable to the current sensing environment, which helps to improve the sensing performance and enhance the sensing reliability.

[0171] The technical solution provided by the embodiments of the present application can be applied to scenarios where backscatter communication devices participate in sensing. For example, it can be applied to scenarios such as item inventory, logistics inventory, fire warning, etc. For another example, it can be applied to scenarios such as RFID dedicated readers, WiFi transmission scenarios, gNB transmission scenarios, or next-generation mobile communication scenarios, etc.

[0172] The technical solution provided by the embodiments of the present application can be applied in a bistatic architecture or a monostatic architecture. The first communication device can be a base station, a reader, a relay, a terminal, etc., and the second communication device is a backscatter communication device, which can be a tag device, a terminal, etc. According to the spatial state of the second communication device and the sensing target, two auxiliary sensing methods can be divided. One is that the second communication device is decoupled from the sensing target, that is, the second communication device is located beside the sensing target. In this case, the second communication device is generally stationary. The other is that the second communication device is coupled to the sensing target, that is, the second communication device is attached to the sensing target, and the motion state of the second communication device changes with the change of the sensing target.

[0173] The second communication device can have multiple capabilities or multiple transmission modes. The transmission mode can include an active transmission mode or a passive transmission mode. Among them, the active transmission mode means that the second communication device independently generates a carrier signal, modulates the information to be transmitted onto the independently generated carrier signal, generates a first signal, and sends the first signal. The passive transmission mode means that the second communication device receives a second signal generated by other communication devices, modulates the information to be transmitted onto the second signal, generates a first signal, and sends the first signal.

[0174] In the bistatic architecture, the first communication device can include Figure 11 or Figure 13 the sensing node A or the sensing node B in

[0175] 1) The first communication device is the sensing node A, including an RF radio frequency source. The third communication device is the sensing node B. The sensing node A can determine whether the first condition is satisfied through the sensing node B. In the case of satisfying the first condition, determine the first information, and send the first information to the second communication device;

[0176] 2) The first communication device is the sensing node B, and the third communication device is the sensing node A, including an RF radio frequency source. The sensing node B determines whether the first condition is satisfied. In the case of satisfying the first condition, determine the first information, and send the first information to the second communication device, or send the first information to the sensing node A, and the sensing node A sends it to the second communication device.

[0177] Among them, the sensing node A can be a base station, a reader, or a relay, and the sensing node B can be a terminal. For the bistatic architecture with A transmitting and B receiving, the sensing node A and the sensing node B are not the same device, and their physical positions are separated.

[0178] In a monostatic architecture, the first communication device can be Figure 12 or Figure 14 the sensing node A in , and there are the following situations:

[0179] 1) The first communication device is a base station, a reader, or a relay, and the second communication device is a tag device;

[0180] 2) The first communication device is a terminal, and the second communication device is a tag device;

[0181] 3) The first communication device is a base station or a relay, and the second communication device is a terminal.

[0182] For the monostatic architecture of A transmitting and A receiving, the sensing node A transmits and receives by itself, and the sensing signal transmission and reception are performed by the same device. The sensing node A performs sensing by receiving the first signal.

[0183] The first communication device can obtain sensing requirement information and perform sensing operations based on the sensing requirement information. The sensing requirement information is the sensing information required by the sensing service initiator, and can include environmental information within the sensing range or characteristic information of the sensing target within the sensing range. The sensing service initiator can be Figures 11 to 14 the first device in , and can include third-party devices, application services, core network devices, etc.

[0184] Among them, the environmental information within the sensing range can include, but is not limited to, the spatial map, humidity, temperature, brightness, atmospheric pressure, air quality, weather conditions, topography, building / vegetation distribution, population statistics, crowd density, vehicle density, etc. within the sensing range;

[0185] The characteristic information of the sensing target within the sensing range refers to the information that can reflect the attributes or the state of the sensing target, and can include, but is not limited to, the spatial coordinates of the sensing target, the distance of the sensing target, the speed of the sensing target, the acceleration of the sensing target, the time delay of the sensing target, the Doppler of the sensing target, the angle of the sensing target, the material of the sensing target, the shape of the sensing target, the category of the sensing target, the radar cross section (RCS) of the sensing target, the state of the sensing target, such as the monitored health state (blood pressure, heart rate, body temperature), etc.

[0186] When the first communication device meets the first condition, it can determine and send the first information, and the first information is used to instruct the second communication device to switch the transmission configuration information. After receiving the first information, the second communication device can switch the transmission configuration information according to the first information and send the first signal based on the switched transmission configuration information.

[0187] Optionally, the transmission configuration information may include transmission parameters or a transmission mode;

[0188] Wherein, the transmission parameters may include at least one of energy storage parameters, amplification parameters, frequency shifting parameters, self-sensing parameters, sideband suppression parameters, measurement parameters, duplex parameters, and antenna parameters, and the transmission parameters correspond to the capability information of the second communication device;

[0189] The transmission mode may include a passive transmission mode or an active transmission mode.

[0190] In the embodiments of the present application, the first condition is related to sensing performance such as sensing reliability, sensing efficiency, and sensing accuracy, and may include at least one of the following:

[0191] 1) The first signal sent by the second communication device is not detected within the first time period;

[0192] If the first signal sent by the second communication device is not detected within the first time period, it is considered that there may be a problem with the signal transmission of the second communication device. In this case, it can be considered that the first condition is satisfied, and the first information is determined to instruct the second communication device to switch the transmission configuration information, such as switching the amplification parameters, through the first information. The first time period may be predefined by the protocol or configured by the network-side device through high-layer signaling. The first signal may be actively generated by the second communication device, or the first signal is generated based on the second signal, and the second signal is a carrier signal sent by the first communication device or the third communication device. The first signal may be sent by the second communication device based on different capabilities, such as different frequency shifting capabilities, different amplification capabilities, etc.

[0193] 2) The first signal is not detected during N sensing measurement processes, where N is greater than or equal to 1;

[0194] If the first signal sent by the second communication device is not detected during all N sensing measurement processes, it is considered that there may be a problem with the signal transmission of the second communication device. In this case, it can be considered that the first condition is satisfied, and the first information is determined to instruct the second communication device to switch the transmission configuration information, such as switching the amplification parameters, through the first information. N may be predefined by the protocol or configured by the network-side device through high-layer signaling. The first signal may be actively generated by the second communication device or generated based on the second signal, and the second signal is a carrier signal sent by the first communication device or the third communication device.

[0195] 3) The interference measurement value of the coexisting device of the second communication device is greater than or equal to the first threshold;

[0196] The second communication device may coexist with other devices. For example, in a scenario where a backscatter communication system coexists with a broadband communication / sensing system, the second communication device coexists with the devices in the broadband communication / sensing system. The signal modulation of the second communication device may introduce interference to the coexisting devices. For example, when the Equivalent Isotropic Radiated Power (EIRP) of the first signal is greater than or equal to a certain threshold, interference will be caused to the coexisting devices, such as co-channel interference or image interference or harmonic interference in the in-band, out-of-band, and spurious regions.

[0197] The coexisting device may report the interference measurement quantity to the first communication device. If the interference measurement quantity of the coexisting device of the second communication device is greater than or equal to the first threshold, it can be considered that the second communication device causes relatively large interference to the coexisting device. In this case, it can be considered that the first condition is satisfied, and the first information can be determined to indicate the second communication device to switch the transmission configuration information, such as switching the frequency shift parameter.

[0198] The first threshold is related to the regulation of RF Emission and can be predefined by the protocol or configured by the network-side device through high-layer signaling.

[0199] 4) The cascaded channel quality of the second communication device participating in sensing is less than or equal to the second threshold;

[0200] The cascaded channel quality of the second communication device participating in sensing may change. For example, when the second communication device is stationary, such as when the second communication device is decoupled from the sensing target, the second communication device is stationary, the sensing target moves, or when the second communication device is coupled with the sensing target, both the second communication device and the sensing target are in a stationary state, mainly considering the dynamic change of the channel resulting in the change of the cascaded channel quality. When the second communication device is moving, in addition to the wireless environment may affect the change of the cascaded channel quality, the movement of the second communication device may also affect the cascaded channel quality, such as Doppler frequency shift, and the influence of the distance between the second communication device and the sensing node on the channel measurement parameters.

[0201] If the cascaded channel quality of the second communication device participating in sensing deteriorates, such as the cascaded channel quality of the second communication device participating in sensing is less than or equal to the second threshold, it can be considered that the first condition is satisfied, and the first information can be determined to indicate the second communication device to switch the transmission configuration information, such as switching the measurement parameters.

[0202] The second threshold can be predefined by the protocol or configured by the network-side device through high-layer signaling.

[0203] 5) The sensing metric is less than or equal to the third threshold;

[0204] Optionally, the sensing metric may include at least one of the following:

[0205] Sensing Signal-to-Noise Ratio (SNR); Sensing Signal to Interference plus Noise Ratio (SINR); Sensing Reference Signal Received Power (RSRP); Sensing Received Signal Strength Indicator; Sensing Reference Signal Receiving Quality (RSRQ); Sensing sensitivity.

[0206] Among them, the specific values of the third thresholds corresponding to different sensing metrics may be the same or different. The third threshold may be predefined by the protocol or configured by the network-side device through high-layer signaling.

[0207] The sensing sensitivity may include sensing Residual Self-Interference Cancellation (RSIC) or Residual Interference Cancellation (RIC), or, in a bistatic architecture, the sensitivity calculated based on Transmitter leakage RSIC (Tx leakage RSIC) and Receiver blocking RSIC (Rx blocking RSIC).

[0208] During the sensing signal measurement process of the first communication device, if the sensing metric is less than or equal to the third threshold, it can be considered that the first condition is satisfied, and the first information can be determined to indicate the second communication device to switch the transmission configuration information, such as switching the sensing parameters.

[0209] 6) The measurement quantity of the reference signal reported by the second communication device is less than or equal to the fourth threshold;

[0210] If the second communication device has the measurement capability, the second communication device can measure the reference signal and report the measurement quantity of the reference signal. If the measurement quantity of the reference signal reported by the second communication device is less than or equal to the fourth threshold, it can be considered that the first condition is satisfied, and the first information can be determined to indicate the second communication device to switch the transmission configuration information, such as switching the amplification parameters.

[0211] The fourth threshold may be predefined by the protocol or configured by the network-side device through high-layer signaling.

[0212] 7) Receiving the energy shortage information reported by the second communication device;

[0213] If the energy shortage information reported by the second communication device is received, it can be considered that the energy of the energy storage capacitor of the second communication device is insufficient to maintain subsequent auxiliary sensing, which will cause the sensing to be interrupted forcedly. In this case, it can be considered that the first condition is satisfied, and the first information can be determined to instruct the second communication device to switch the transmission configuration information, such as switching the energy storage parameters.

[0214] Of course, in addition to reporting the measurement of the reference signal or the energy shortage information, the second communication device can also report other auxiliary sensing information to determine whether the first condition is satisfied based on the auxiliary sensing information reported by the second communication device, so as to timely instruct the second communication device to switch the transmission configuration information when the first condition is satisfied.

[0215] 8) Determine that the second communication device needs to adjust the transmission power according to the Power Headroom Report (PHR);

[0216] Optionally, the power headroom report can be determined according to at least one of the equivalent isotropic radiated power of the first signal sent by the second communication device, the received power of the reference signal of the second signal measured by the second communication device, and the device parameters of the second communication device. The device parameters of the second communication device can include the amplification factor of the reflection amplifier, the frequency translation level, etc.

[0217] If it is determined according to the power headroom report that the second communication device needs to adjust the transmission power, it can be considered that the first condition is satisfied, and the first information can be determined to instruct the second communication device to switch the transmission configuration information, such as switching the transmission power.

[0218] 9) The sensing requirement information changes;

[0219] The sensing requirement information includes the environmental information within the sensing range or the characteristic information of the sensing target within the sensing range. If the sensing requirement information changes, it can be considered that the first condition is satisfied, and the first information can be determined to instruct the second communication device to switch the transmission configuration information through the first information. For example, if the sensing requirement information includes ranging, the second communication device can be instructed to switch to the passive transmission mode through the first information to be able to utilize the double-sideband signal of the backscattered signal. Another example is that if the sensing requirement information includes speed measurement, the second communication device can be instructed to switch to the active transmission mode through the first information.

[0220] 10) The sensing parameter configuration information changes.

[0221] Optionally, the sensing parameter configuration information can include at least one of the following:

[0222] Sensing resources; sensing waveforms; sub-carrier spacing (SCS); cyclic prefix duration (CP duration); modulation rate; coding rate; modulation and coding strategy (MCS), such as an MCS table.

[0223] Among them, the sensing resources may include sensing time-domain resources, sensing frequency-domain resources, sensing space-domain resources, etc.;

[0224] The sensing waveform may include a single-frequency signal waveform or a wide-frequency signal waveform. The wide-frequency signal waveform such as an orthogonal frequency division multiplexing (OFDM) signal waveform, a chirp signal waveform, etc., may also include other new waveforms.

[0225] When the sensing parameter configuration information changes, it can be considered that the first condition is met, and the first information can be determined to instruct the second communication device to switch the transmission configuration information through the first information. For example, if the sensing waveform is a single-frequency signal waveform, the second communication device can be instructed to switch to the passive transmission mode through the first information. If the sensing waveform is an OFDM signal waveform or a chirp signal waveform, the second communication device can be instructed to switch to the active transmission mode through the first information.

[0226] It should be noted that the first condition may include any one or a combination of the above items. When the first communication device meets the first condition, it determines the first information to timely instruct the second communication device to switch the transmission configuration information, improve the sensing performance, and enhance the sensing reliability.

[0227] In some embodiments of the present application, before the first communication device determines the first information, the method may further include the following steps:

[0228] The first communication device receives the capability information of the second communication device.

[0229] In the embodiments of the present application, the second communication device may report the capability information of the second communication device. Optionally, the second communication device may report the capability information of the second communication device to the first communication device, or the second communication device may report the capability information of the second communication device to the third communication device, and the third communication device forwards it to the first communication device.

[0230] The first communication device may receive the capability information of the second communication device from the second communication device or the third communication device.

[0231] The capability information of the second communication device may include at least one of the following:

[0232] 1) Energy storage capacity information;

[0233] The energy storage capacity information may include information for indicating whether there is an energy storage capacity, or, in the case of having an energy storage capacity, information on the energy storage size.

[0234] 2) Amplification capacity information;

[0235] The amplification capacity information may include information for indicating whether there is an amplification capacity, or, in the case of having an amplification capacity, information on the supported amplification factor. The amplification capacity may include a downlink amplification capacity, an uplink amplification capacity, or a reflection amplification capacity, such as being configured with a reflection amplifier.

[0236] 3) Frequency shifting capacity information;

[0237] The frequency shifting capacity information may include KHz-level frequency shifting capacity information or MHz-level frequency shifting capacity information.

[0238] 4) Self-sensing capacity information;

[0239] The self-sensing capacity information may include information for indicating whether there is a self-sensing capacity. If there is a self-sensing capacity, the antenna and circuit impedance may vary with time.

[0240] 5) Sideband suppression capacity information;

[0241] The sideband suppression capacity information may include information for indicating whether there is a sideband suppression capacity, or, in the case of having a sideband suppression capacity, having an upper sideband suppression capacity or a lower sideband suppression capacity. If there is an upper sideband suppression capacity, the backscatter signal is only transmitted in the lower sideband, and if there is a lower sideband suppression capacity, the backscatter signal is only transmitted in the upper sideband.

[0242] 6) Carrier generation capacity information;

[0243] The carrier generation capacity information may include information for indicating whether there is a carrier generation capacity.

[0244] 7) Measurement capacity information;

[0245] The measurement capacity information may include information for indicating whether there is a measurement capacity, or, in the case of having a measurement capacity, whether it has a simple measurement capacity or a strong measurement capacity.

[0246] 8) Duplex capacity information;

[0247] The duplex capacity information may include information for indicating whether there is a duplex capacity, or information for indicating only supporting the half-duplex mode, or information for indicating supporting the full-duplex mode, or information for indicating supporting the sub-band full-duplex mode.

[0248] 9) Antenna capability information.

[0249] The antenna capability information may include information for indicating the number of antennas or the gain.

[0250] The first communication device receives the capability information of the second communication device, and then determines the first information based on the capability information of the second communication device, which can make the determined first information better match the capability of the second communication device, and helps to improve the switching success rate of the transmission configuration information.

[0251] In some embodiments of the present application, the first communication device sending the first information may include the following steps:

[0252] The first communication device indicates the first information in a predefined manner, or indicates the first information through control information, or indicates the first information in an implicit manner;

[0253] Among them, the predefined manner includes sensing a change in the parameter configuration information or a change in the modulation mode of the second communication device;

[0254] The implicit manner includes at least one of the following:

[0255] Modulation and coding strategy, carrier type, sequence type, preamble type, preamble length, power level.

[0256] In an embodiment of the present application, the first communication device sends the first information, and the first information is used to indicate the second communication device to perform a handover of transmission configuration information.

[0257] The first information may be indicated in a predefined manner. For example, it can be indicated by sensing a change in the parameter configuration information, such as sensing a change in the waveform. Or it can be indicated by a change in the modulation mode of the second communication device, such as the second communication device changing from total reflection to non-total reflection, or from non-total reflection to total reflection, or the mutual change between amplitude, phase, and frequency modulation of the second communication device.

[0258] The first information may also be indicated in an explicit manner. For example, it can be indicated through control information.

[0259] The first information can also be indicated implicitly. For example, it can be indicated by modulation and coding strategies, such as coding rate, symbol rate, data rate, modulation rate, coding length, etc. The coding rate can include Miller carrier coefficient, convolutional code rate, etc. Or it can be indicated by carrier type, such as single-frequency signal, OFDM signal, chirp signal, etc. Or it can be indicated by sequence type, such as ZC (Zadoff-Chu) sequence, M sequence, etc. Or it can be indicated by preamble type, such as whether there is a section separator, calibration symbol, etc. Or it can be indicated by preamble length. Or it can be indicated by power level.

[0260] The first communication device can timely indicate the first information to the second communication device through at least one of the above methods, so that the second communication device can timely switch the transmission configuration information.

[0261] In some embodiments of the present application, the method may further include the following steps:

[0262] The first communication device sends second information, and the second information is used to indicate that there is a conflict between the second communication device and other communication devices.

[0263] In the embodiments of the present application, when considering multiple backscatter communication devices participating in sensing, if multiple backscatter communication devices send the first signal using the same transmission resource, such as RN16 in RFID, or Msg 1 or Msg A in NR, it will cause the sensing node to detect a conflict.

[0264] The first communication device is the sensing node A or the sensing node B. A possible implementation is that if multiple first signals are detected on the same time-frequency resource, it is determined as a conflict. The first communication device can determine whether the conflict needs to be resolved according to the actual situation.

[0265] When the first communication device detects a conflict, if the first signals of multiple conflicting backscatter communication devices do not carry modulated data, for example, multiple backscatter communication devices perform total reflection, then there is no need to resolve the conflict, and the multiple first signals can assist the first communication device to eliminate non-ideal factors at the transceiver or enhance the sensing SNR.

[0266] When the first communication device detects a conflict, if the first signals of multiple conflicting backscatter communication devices carry modulated data, such as using On-Off-Keying (OOK) modulation to modulate the identifier of the backscatter communication device, then the first communication device may not send the second information, that is, it does not indicate the existence of a conflict to the conflicting backscatter communication devices, and these conflicting backscatter communication devices can determine whether to switch the transmission configuration information by themselves.

[0267] When the first communication device detects a collision, if the first signals of multiple colliding backscatter communication devices carry modulated data, the first communication device may send second information to the colliding backscatter communication devices, indicating that there is a collision with other communication devices. That is, if the second communication device has a collision with other communication devices, the first communication device may send the second information to the second communication device, or send the second information to the third communication device, and the third communication device sends it to the second communication device, indicating that the second communication device has a collision with other communication devices.

[0268] After the second communication device receives the second information, the second communication device may re-compete for access to participate in sensing. For example, the second information carries a Q value related to the number of colliding backscatter communication devices. Based on this Q value, the second communication device may generate a random number of 2^Q - 1 and participate in sensing in a Time Division Multiple Access (TDMA) manner.

[0269] Optionally, the second information may include the first information. That is, when the first communication device sends the second information for indicating a collision, it may carry the first information for indicating a switch of transmission configuration information. For example, the first communication device sends different Backscatter Link Frequency (BLF) binding information under different identifiers. When the second communication device receives the second information, it obtains the BLF for sending the first signal again to resolve the collision. Or, different backscatter communication devices may also be distinguished by configuring different Random Access Channel Occasions (ROs), spreading code sequences, different powers, etc.

[0270] In some embodiments of the present application, the second communication device may switch the transmission configuration information when receiving the first information or meeting the second condition, and then send the first signal based on the switched transmission configuration information;

[0271] wherein, the second condition may include at least one of the following:

[0272] No control information is received within the second time period;

[0273] The measured value of the reference signal is less than or equal to the fifth threshold;

[0274] The energy of the energy storage capacitor is less than or equal to the sixth threshold.

[0275] In an embodiment of the present application, the first information is used to instruct a second communication device to perform a handover of transmission configuration information. If the second communication device receives the first information, the second communication device may, according to the first information, perform a handover of transmission configuration information and send a first signal based on the handovered transmission configuration information. The second communication device may send the first signal to the first communication device or the third communication device.

[0276] The second communication device may also perform a handover of transmission configuration information when a second condition is met. The second condition may be defined according to whether the second communication device has measurement capabilities. For example, if the second communication device does not have measurement capabilities, when no control information is received within a second duration, it is considered that there is a problem with the information transmission of the first communication device or the third communication device, and a handover of transmission configuration information may be performed, such as switching to an active transmission mode. Another example is that if the second communication device has measurement capabilities, when the measurement quantity of a reference signal, such as RSRP, is less than or equal to a fifth threshold, a handover of transmission configuration information may be performed, such as switching the amplification parameter. Another example is that when the energy of the energy storage capacitor is less than or equal to a sixth threshold, it is considered that the energy of the energy storage capacitor is insufficient to assist sensing, and a handover of transmission configuration information may be performed, switching to an energy storage state.

[0277] The fifth threshold is greater than or equal to the reception sensitivity of the second communication device. The second duration, the fifth threshold, and the sixth threshold may be predefined by the protocol or configured by a network-side device through high-layer signaling. The control information may include the first information, or the second information, or information for activation or deactivation.

[0278] When the second communication device performs a handover of transmission configuration information upon receiving the first information or when the second condition is met and sends a first signal based on the handovered transmission configuration information, the handovered transmission configuration information can better adapt to the current sensing environment, which helps to improve sensing performance and sensing reliability.

[0279] In some embodiments of the present application, after the second communication device switches the transmission configuration information when the second condition is met, the second communication device may report the handovered transmission configuration information. For example, send the handovered transmission configuration information to the first communication device or the third communication device.

[0280] The second communication device reports the handovered transmission configuration information, so that the sensing node can perform sensing measurements on the resources corresponding to the handovered transmission configuration information, which helps to improve sensing efficiency and sensing reliability.

[0281] In some embodiments of the present application, after the second communication device receives the second information, if the second communication device does not receive the first information within the third time period, then the second communication device switches the transmission configuration information when the second condition is met. That is, when the second communication device receives the second information and determines that there is a conflict with other communication devices, if it does not receive the first information within the third time period, the second communication device can independently determine whether the second condition is met, and when the second condition is met, perform the switching of the transmission configuration information to resolve the conflict in a timely manner.

[0282] For ease of understanding, the technical solutions provided by the embodiments of the present application will be further described below through specific examples.

[0283] In the following examples, the first communication device is taken as a sensing node, and the second communication device is taken as a backscatter communication device as an example.

[0284] Example 1: The sensing node instructs the backscatter communication device to switch transmission parameters or transmission modes

[0285] In this example, the sensing node instructs the backscatter communication device to switch transmission parameters or transmission modes according to the first condition and the capability information of the backscatter communication device. The transmission parameters include parameters bound to the capabilities of the backscatter communication device. For example, parameters corresponding to uplink / downlink amplification capabilities, such as the size of the radar cross-section (RCS), parameters corresponding to carrier generation capabilities, parameters corresponding to frequency shifting capabilities, parameters corresponding to self-sensing capabilities, and so on. Whether in an indoor or outdoor scenario, when the backscatter communication device assists sensing, if the backscatter communication device integrates different capabilities, it can be instructed to switch according to the first condition to meet the sensing metrics.

[0286] Method 1: A transmits and A receives

[0287] The sensing node A is responsible for sending the sensing signal and receiving the first signal. According to the first condition, the sensing node A sends the first information to the backscatter communication device to instruct the backscatter communication device to switch to the corresponding transmission parameters or transmission modes.

[0288] The sensing node A first receives the sensing demand information sent by the first device. The first device includes third-party devices, application servers, core network devices, etc. The sensing demand information includes, but is not limited to, environmental information within the sensing range or characteristic information of the sensing target within the sensing range.

[0289] The sensing node A sends the first information to the backscatter communication device according to the first condition. The first condition can be predefined and has been described in detail in the previous embodiments, so it will not be elaborated here.

[0290] The sensing node A receives the first signal sent by the backscatter communication device:

[0291] If the backscatter communication device switches from the passive transmission mode to the active transmission mode, the first signal is actively generated by the backscatter communication device;

[0292] If the backscatter communication device switches from the active transmission mode to the passive transmission mode, the first signal is modulated and reflected based on the second signal.

[0293] Optionally, the backscatter communication device may report its capability information. This has been described in detail in the previous embodiments and will not be elaborated here.

[0294] Method 2: A sends and B receives

[0295] The sensing node A is responsible for sensing the signal transmission, and the sensing node B is responsible for receiving the first signal. The sensing node A or the sensing node B sends the first information to the backscatter communication device according to the first condition to instruct the backscatter communication device to switch to the corresponding transmission parameter or transmission mode.

[0296] The sensing node A receives the sensing requirement information sent by the first device, or the sensing node B receives the sensing requirement information sent by the first device, or the sensing node A forwards the sensing requirement information sent by the first device to the sensing node B after receiving it, or the sensing node B forwards the sensing requirement information sent by the first device to the sensing node A after receiving it.

[0297] The sensing node A or the sensing node B sends the first information to the backscatter communication device according to the first condition.

[0298] The sensing node B receives the first signal sent by the backscatter communication device:

[0299] If the backscatter communication device switches from the passive transmission mode to the active transmission mode, the first signal is actively generated by the backscatter communication device;

[0300] If the backscatter communication device switches from the active transmission mode to the passive transmission mode, the first signal is modulated and reflected based on the second signal.

[0301] Optionally, the backscatter communication device may report its capability information to the sensing node A or the sensing node B.

[0302] Example 2: The backscatter communication device switches the transmission parameter or transmission mode according to the second condition

[0303] The backscatter communication device switches the transmission parameters or transmission mode according to the second condition and the capability information (also known as device parameters or device capabilities). Determining whether to switch is an implementation behavior of the backscatter communication device. However, after the backscatter communication device determines to switch the transmission parameters or transmission mode, it will choose to feedback or not feedback its switched transmission parameters or transmission mode to sensing node A or sensing node B.

[0304] Optionally, after the backscatter communication device switches the transmission parameters or transmission mode, it reports its switched transmission parameters or transmission mode to sensing node A or sensing node B. This way helps to ensure that the first signal is successfully received by sensing node A or sensing node B.

[0305] Optionally, after the backscatter communication device switches the transmission parameters or transmission mode, it does not report its switched transmission parameters or transmission mode to sensing node A or sensing node B, but sends the first signal through a resource competition method. Optionally, sensing node A or sensing node B blindly detects the first signal in the predefined resources. For example, the backscatter communication device actively increases the BLF according to the second condition, and the sensing node blindly searches for the backscattered signal after frequency shifting.

[0306] Method 1: Trigger of Device-originated (DO)-Device-originated-Auto (DOA)

[0307] DO means that the data stream originates from the backscatter communication device (such as the tag device in RFID);

[0308] Device-terminated (DT) means that the data stream is transmitted to the backscatter communication device.

[0309] For the data whose data stream originates from the backscatter communication device, that is, DO data, it can be further classified as:

[0310] DOA, that is, the backscatter communication device autonomously initiates an uplink session.

[0311] DO data transmission triggered by DT (Device-originated-device-terminated triggered, DO-DTT), that is, a downlink-triggered uplink session.

[0312] For the DO-DOA service scenario, it is required that the backscatter communication device can autonomously generate a carrier signal. For example, connect a large number of various sensors, and these sensors collect and actively report information about the environment, devices, and organisms when necessary.

[0313] If the backscatter communication device is currently in the passive transmission mode, the backscatter communication device switches to the active transmission mode and corresponding transmission parameters according to the second condition. For example, it switches the parameters corresponding to the uplink amplification ability and sends a first signal to sensing node A or sensing node B.

[0314] If the backscatter communication device is currently in the active transmission mode, the backscatter communication device switches to the corresponding transmission parameters according to the second condition. For example, it switches to the parameters corresponding to the uplink / downlink amplification ability and sends a first signal to sensing node A or sensing node B.

[0315] For the second condition, a detailed description has been given in the previous embodiments and will not be repeated here.

[0316] Method 2: Transmission parameter switching or transmission mode switching

[0317] Method 1 stipulates that the switched transmission mode is the active transmission mode, which is applicable to scenarios where the backscatter communication device has self-sensing capabilities. Method 2 considers a more flexible switching method.

[0318] 1) The backscatter communication device has measurement capabilities

[0319] The backscatter communication device receives control information or a second signal and measures the control information or the second signal. If the RSRP of the control information or the second signal measured by the backscatter communication device is lower than the threshold value, then a transmission parameter or transmission mode switch is performed. This includes but is not limited to switching from the passive transmission mode to the active transmission mode and switching from the modulation state to the energy storage state (for example, the backscatter communication device performs a full absorption operation).

[0320] 2) The backscatter communication device does not have measurement capabilities

[0321] When the backscatter communication device does not receive control information or the second information, or the activation / deactivation information within a specified time, the backscatter communication device can switch its state. For example, it switches from not connecting to the downlink LNA to connecting to the downlink LNA to improve the downlink reception sensitivity or the backscatter sensitivity.

[0322] In the embodiments of this application, for the same backscatter communication device with different capabilities (such as different uplink signal amplification capabilities, active carrier generation capabilities) or different transmission modes (such as passive transmission mode, active transmission mode) participating in sensing, the transmission configuration information can be switched in the same sensing process, enabling different capabilities and different transmission modes of the backscatter communication device to be applicable to different sensing scenarios, which helps to improve the sensing performance of the backscatter communication device during assisted sensing, improve the sensing efficiency or sensing accuracy, and ensure sensing reliability.

[0323] Corresponding to the above method embodiments, the embodiments of the present application further provide a signal transmission method, as Figure 16 shown. The method includes the following steps:

[0324] S1610: When the second communication device receives the first information or meets the second condition, switch the transmission configuration information;

[0325] S1620: The second communication device sends the first signal based on the switched transmission configuration information;

[0326] Wherein, the second condition includes at least one of the following:

[0327] No control information is received within the second time period;

[0328] The measurement of the reference signal is less than or equal to the fifth threshold;

[0329] The energy of the energy storage capacitor is less than or equal to the sixth threshold.

[0330] Applying the method provided by the embodiments of the present application, when the second communication device receives the first information or meets the second condition, it switches the transmission configuration information and sends the first signal based on the switched transmission configuration information. In this way, in the same sensing process, the second communication device can switch the transmission configuration information, so that the switched transmission configuration information is better adapted to the current sensing environment, which helps to improve the sensing performance and the sensing reliability.

[0331] In some embodiments of the present application, after the second communication device switches the transmission configuration information when meeting the second condition, the method further includes:

[0332] The second communication device reports the switched transmission configuration information.

[0333] In some embodiments of the present application, before the second communication device switches the transmission configuration information when receiving the first information, the method further includes:

[0334] The second communication device reports the capability information of the second communication device.

[0335] In some embodiments of the present application, the capability information of the second communication device includes at least one of the following:

[0336] Energy storage capability information;

[0337] Amplification capability information;

[0338] Frequency shifting capability information;

[0339] Self-sensing capability information;

[0340] Sideband suppression capability information;

[0341] Carrier generation capability information;

[0342] Measurement capability information;

[0343] Duplex capability information;

[0344] Antenna capability information.

[0345] In some embodiments of the present application, the first information is indicated by a predefined method, or by control information, or by an implicit method;

[0346] Among them, the predefined method includes sensing a change in the configuration information of the parameter or a change in the modulation method of the second communication device;

[0347] The implicit method includes at least one of the following:

[0348] Modulation and coding strategy, carrier type, sequence type, preamble type, preamble length, power level.

[0349] In some embodiments of the present application, the transmission configuration information includes transmission parameters or a transmission mode;

[0350] Among them, the transmission parameters include at least one of energy storage parameters, amplification parameters, frequency shifting parameters, self-sensing parameters, sideband suppression parameters, measurement parameters, duplex parameters, and antenna parameters;

[0351] The transmission mode includes a passive transmission mode or an active transmission mode.

[0352] In some embodiments of the present application, the first signal is actively generated by the second communication device, or the first signal is generated by the second communication device based on the received second signal.

[0353] In some embodiments of the present application, before the second communication device switches the transmission configuration information when receiving the first information or meeting the second condition, the method further includes:

[0354] The second communication device receives second information, and the second information is used to indicate that there is a conflict between the second communication device and other communication devices.

[0355] In some embodiments of the present application, after the second communication device receives the second information, the method further includes:

[0356] The second communication device re-competes for access and participates in sensing.

[0357] In some embodiments of the present application, the second information includes the first information.

[0358] In some embodiments of the present application, when the second communication device receives the first information or meets the second condition, it switches the transmission configuration information, including:

[0359] If the second communication device does not receive the first information within the third duration, the second communication device switches the transmission configuration information when it meets the second condition.

[0360] The signal transmission method provided by the embodiments of the present application can achieve Figure 15 each process implemented by the method embodiment shown, and achieve the same technical effects. To avoid repetition, it will not be elaborated here.

[0361] For the signal transmission method provided by the embodiments of the present application, the execution subject can be a signal transmission device. In the embodiments of the present application, taking the signal transmission device executing the signal transmission method as an example, the signal transmission device provided by the embodiments of the present application is described.

[0362] As Figure 17 shown, the signal transmission device 1700 includes the following modules:

[0363] An obtaining module 1710, configured to obtain sensing requirement information, where the sensing requirement information is the sensing information required by the sensing service initiator;

[0364] A determining module 1720, configured to determine the first information when meeting the first condition, where the first information is used to instruct the second communication device to switch the transmission configuration information;

[0365] A first sending module 1730, configured to send the first information;

[0366] Wherein, the first condition includes at least one of the following:

[0367] The first signal sent by the second communication device is not detected within the first duration;

[0368] The first signal is not detected during N sensing measurement processes, where N is greater than or equal to 1;

[0369] The interference measurement of the coexisting device of the second communication device is greater than or equal to the first threshold;

[0370] The sensing cascade channel quality of the second communication device participating in sensing is less than or equal to the second threshold;

[0371] The sensing index is less than or equal to the third threshold;

[0372] The measurement of the reference signal reported by the second communication device is less than or equal to the fourth threshold;

[0373] The insufficient energy information reported by the second communication device is received;

[0374] Determine that the second communication device needs to adjust its transmission power according to the power margin report;

[0375] Sense that the demand information has changed;

[0376] Sense that the parameter configuration information has changed.

[0377] By applying the method provided in the embodiments of the present application, after obtaining the sensing demand information, and when the first condition is satisfied, determine and send the first information, which is used to instruct the second communication device to perform a handover of the transmission configuration information. In this way, in the same sensing process, the second communication device can switch the transmission configuration information, so that the switched transmission configuration information is better adapted to the current sensing environment, which helps to improve the sensing performance and the sensing reliability.

[0378] In some embodiments of the present application, the sensing metrics include at least one of the following:

[0379] Sensing signal-to-noise ratio; Sensing signal power to interference plus noise ratio; Sensing reference signal received power; Sensing received signal strength indication; Sensing reference signal received quality; Sensing sensitivity.

[0380] In some embodiments of the present application, the power margin report is determined according to at least one of the effective isotropic radiated power of the second communication device for sending the first signal, the reference signal received power of the second communication device for measuring the second signal, and the device parameters of the second communication device, where the second signal is a carrier signal sent by the first communication device or the third communication device.

[0381] In some embodiments of the present application, the sensing demand information includes environmental information within the sensing range or characteristic information of the sensing target within the sensing range.

[0382] In some embodiments of the present application, the sensing parameter configuration information includes at least one of the following:

[0383] Sensing resources; Sensing waveforms; Subcarrier spacing; Cyclic prefix duration; Modulation rate; Coding rate; Modulation and coding strategy.

[0384] In some embodiments of the present application, the signal transmission device 1700 further includes a first receiving module, which is used for:

[0385] Before determining the first information, receive the capability information of the second communication device;

[0386] Wherein, the capability information includes at least one of the following:

[0387] Energy storage capability information;

[0388] Amplification capability information;

[0389] Frequency shifting capability information;

[0390] Self - sensing ability information;

[0391] Sideband suppression ability information;

[0392] Carrier generation ability information;

[0393] Measurement ability information;

[0394] Duplex ability information;

[0395] Antenna ability information.

[0396] In some embodiments of the present application, the first transmission module 1730 is specifically configured to:

[0397] Indicate the first information in a predefined manner, or indicate the first information through control information, or indicate the first information in an implicit manner;

[0398] Wherein, the predefined manner includes a change in sensing parameter configuration information or a change in the modulation method of the second communication device;

[0399] The implicit manner includes at least one of the following:

[0400] Modulation and coding strategy, carrier type, sequence type, preamble type, preamble length, power level.

[0401] In some embodiments of the present application, the transmission configuration information includes transmission parameters or a transmission mode;

[0402] Wherein, the transmission parameters include at least one of energy storage parameters, amplification parameters, frequency shifting parameters, self - sensing parameters, sideband suppression parameters, measurement parameters, duplex parameters, and antenna parameters;

[0403] The transmission mode includes a passive transmission mode or an active transmission mode.

[0404] In some embodiments of the present application, the first signal is actively generated by the second communication device, or the first signal is generated based on a second signal, and the second signal is a carrier signal sent by the first communication device or the third communication device.

[0405] In some embodiments of the present application, the first transmission module 1730 is further configured to:

[0406] Send second information, and the second information is used to indicate that there is a conflict between the second communication device and other communication devices.

[0407] In some embodiments of the present application, the second information includes the first information.

[0408] The information transmission device 1700 provided by the embodiments of the present application can achieve Figure 15The various processes implemented by the method embodiments shown achieve the same technical effects. To avoid repetition, they will not be elaborated here.

[0409] As Figure 18 shown, the information transmission device 1800 includes the following modules:

[0410] A switching module 1810, configured to switch the transmission configuration information when receiving the first information or satisfying the second condition;

[0411] A second sending module 1820, configured to send a first signal based on the switched transmission configuration information;

[0412] Wherein, the second condition includes at least one of the following:

[0413] Not receiving control information within a second duration;

[0414] The measurement of the reference signal is less than or equal to a fifth threshold;

[0415] The energy of the energy storage capacitor is less than or equal to a sixth threshold.

[0416] Applying the device provided by the embodiments of the present application, when receiving the first information or satisfying the second condition, the transmission configuration information is switched, and a first signal is sent based on the switched transmission configuration information. In this way, in the same sensing process, the transmission configuration information can be switched, so that the switched transmission configuration information is better adapted to the current sensing environment, which helps to improve the sensing performance and enhance the sensing reliability.

[0417] In some embodiments of the present application, the second sending module 1820 is further configured to:

[0418] After switching the transmission configuration information when satisfying the second condition, report the switched transmission configuration information.

[0419] In some embodiments of the present application, the second sending module 1820 is further configured to:

[0420] Before switching the transmission configuration information when receiving the first information, report the capability information of the second communication device.

[0421] In some embodiments of the present application, the capability information of the second communication device includes at least one of the following:

[0422] Energy storage capability information;

[0423] Amplification capability information;

[0424] Frequency shifting capability information;

[0425] Self-sensing capability information;

[0426] Sideband suppression capability information;

[0427] Carrier generation capability information;

[0428] Measurement capability information;

[0429] Duplex capability information;

[0430] Antenna capability information.

[0431] In some embodiments of the present application, the first information is indicated by a predefined method, or by control information, or by an implicit method;

[0432] Among them, the predefined method includes sensing changes in parameter configuration information or changes in the modulation method of the second communication device;

[0433] The implicit method includes at least one of the following:

[0434] Modulation and coding strategy, carrier type, sequence type, preamble type, preamble length, power level.

[0435] In some embodiments of the present application, the transmission configuration information includes transmission parameters or a transmission mode;

[0436] Among them, the transmission parameters include at least one of energy storage parameters, amplification parameters, frequency shifting parameters, self-sensing parameters, sideband suppression parameters, measurement parameters, duplex parameters, and antenna parameters;

[0437] The transmission mode includes a passive transmission mode or an active transmission mode.

[0438] In some embodiments of the present application, the first signal is actively generated by the second communication device, or the first signal is generated by the second communication device based on the received second signal.

[0439] In some embodiments of the present application, the information transmission device 1800 further includes a second receiving module for:

[0440] Before switching the transmission configuration information when receiving the first information or satisfying the second condition, receive the second information, where the second information is used to indicate that there is a conflict between the second communication device and other communication devices.

[0441] In some embodiments of the present application, the information transmission device 1800 further includes a competition module for:

[0442] After receiving the second information, re-compete for access to participate in sensing.

[0443] In some embodiments of the present application, the second information includes the first information.

[0444] In some embodiments of the present application, the switching module 1810 is specifically configured to:

[0445] If the first information is not received within the third time period, then the transmission configuration information is switched when the second condition is satisfied.

[0446] The information transmission device 1800 provided by the embodiments of the present application can implement Figure 16 each process implemented by the method embodiments shown and achieve the same technical effects. To avoid repetition, it will not be elaborated here.

[0447] As Figure 19 shown, the embodiments of the present application further provide a communication device 1900, including a processor 1901 and a memory 1902. A program or instruction that can run on the processor 1901 is stored on the memory 1902. For example, when the communication device 1900 is the first communication device, when the program or instruction is executed by the processor 1901, it implements the above Figure 15 each step of the method embodiment shown and can achieve the same technical effects. When the communication device 1900 is the second communication device, when the program or instruction is executed by the processor 1901, it implements the above Figure 16 each step of the method embodiment shown and can achieve the same technical effects. To avoid repetition, it will not be elaborated here.

[0448] The embodiments of the present application further provide a terminal, including a processor and a communication interface. The communication interface is coupled to the processor. The processor is used to run a program or instruction to implement as Figure 15 or Figure 16 shown in the steps of the method embodiment. This terminal embodiment corresponds to the method embodiment when the above first communication device is a terminal or the method embodiment when the second communication device is a terminal. Each implementation process and implementation manner of the above method embodiment can be applied to this terminal embodiment and can achieve the same technical effects.

[0449] Specifically, Figure 20 is a schematic structural diagram of a terminal for implementing the embodiments of the present application.

[0450] The terminal 2000 includes, but is not limited to, at least some components such as a radio frequency unit 2001, a network module 2002, an audio output unit 2003, an input unit 2004, a sensor 2005, a display unit 2006, a user input unit 2007, an interface unit 2008, a memory 2009, and a processor 2010.

[0451] Those skilled in the art can understand that the terminal 2000 may further include a power source (such as a battery) for supplying power to each component. The power source can be logically connected to the processor 2010 through a power management system, so as to implement functions such as management of charging, discharging, and power consumption management through the power management system. Figure 20 The terminal structure shown in Figure 20 does not limit the terminal. The terminal may include more or fewer components than shown in the figure, or combine some components, or have different component arrangements, which will not be elaborated here.

[0452] It should be understood that in the embodiments of the present application, the input unit 2004 may include a Graphics Processing Unit (GPU) 20041 and a microphone 20042. The graphics processor 20041 processes the image data of static pictures or videos obtained by an image capture device (such as a camera) in a video capture mode or an image capture mode. The display unit 2006 may include a display panel 20061, and the display panel 20061 may be configured in the form of a liquid crystal display, an organic light-emitting diode, etc. The user input unit 2007 includes at least one of a touch panel 20071 and other input devices 20072. The touch panel 20071 is also called a touch screen. The touch panel 20071 may include two parts: a touch detection device and a touch controller. The other input devices 20072 may include, but are not limited to, a physical keyboard, function keys (such as volume control keys, switch keys, etc.), a trackball, a mouse, a joystick, which will not be elaborated here.

[0453] In the embodiments of the present application, after receiving downlink data from a network-side device, the radio frequency unit 2001 can transmit it to the processor 2010 for processing; in addition, the radio frequency unit 2001 can send uplink data to the network-side device. Generally, the radio frequency unit 2001 includes, but is not limited to, an antenna, an amplifier, a transceiver, a coupler, a low-noise amplifier, a duplexer, etc.

[0454] The memory 2009 can be used to store software programs or instructions as well as various data. The memory 2009 may mainly include a first storage area for storing programs or instructions and a second storage area for storing data. Among them, the first storage area may store an operating system, application programs or instructions required for at least one function (such as a sound playback function, an image playback function, etc.). In addition, the memory 2009 may include a volatile memory or a non-volatile memory. Among them, the non-volatile memory may be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), or a flash memory. The volatile memory may be a random access memory (RAM), a static random access memory (SRAM), a dynamic random access memory (DRAM), a synchronous dynamic random access memory (SDRAM), a double data rate synchronous dynamic random access memory (DDR SDRAM), an enhanced synchronous dynamic random access memory (ESDRAM), a synchronous link dynamic random access memory (SLDRAM), and a direct rambus random access memory (DRRAM). The memory 2009 in the embodiments of the present application includes but is not limited to these and any other suitable types of memories.

[0455] The processor 2010 may include one or more processing units; optionally, the processor 2010 integrates an application processor and a modem processor. Among them, the application processor mainly processes operations related to the operating system, user interface, and application programs, etc., and the modem processor mainly processes wireless communication signals, such as a baseband processor. It can be understood that the above modem processor may not be integrated into the processor 2010 either.

[0456] Among them, the radio frequency unit 2001 is used to obtain sensing requirement information, and the sensing requirement information is the sensing information required by the sensing service initiator;

[0457] The processor 2010 is used to determine first information under the condition of satisfying the first condition, and the first information is used to instruct the second communication device to perform a handover of transmission configuration information;

[0458] The radio frequency unit 2001 is further used to send the first information;

[0459] Among them, the first condition includes at least one of the following:

[0460] The first signal sent by the second communication device is not detected within the first time period;

[0461] The first signal is not detected during N sensing measurements, where N is greater than or equal to 1;

[0462] The interference measurement amount of the co-existing device of the second communication device is greater than or equal to the first threshold;

[0463] The sensing cascade channel quality in which the second communication device participates in sensing is less than or equal to the second threshold;

[0464] The sensing index is less than or equal to the third threshold;

[0465] The measurement amount of the reference signal reported by the second communication device is less than or equal to the fourth threshold;

[0466] The insufficient energy information reported by the second communication device is received;

[0467] It is determined that the second communication device needs to adjust the transmission power according to the power headroom report;

[0468] The sensing demand information changes;

[0469] The sensing parameter configuration information changes.

[0470] Alternatively, the processor 2010 is configured to switch the transmission configuration information when the first information is received or the second condition is satisfied;

[0471] The radio frequency unit 2001 is configured to send the first signal based on the switched transmission configuration information;

[0472] Among them, the second condition includes at least one of the following:

[0473] The control information is not received within the second time period;

[0474] The measurement amount of the reference signal is less than or equal to the fifth threshold;

[0475] The energy of the energy storage capacitor is less than or equal to the sixth threshold.

[0476] It can be understood that the implementation processes of the various implementation manners mentioned in this embodiment can refer to the relevant descriptions of the method embodiment and achieve the same or corresponding technical effects. To avoid repetition, they will not be elaborated here.

[0477] This application embodiment also provides a network-side device, including a processor and a communication interface. The communication interface is coupled to the processor, and the processor is configured to run programs or instructions to implement as Figure 15Steps of the method embodiments shown. This network-side device embodiment corresponds to the method embodiments when the above-mentioned first communication device is a network-side device. Each implementation process and implementation method of the above method embodiments can be applied to this network-side device embodiment, and the same technical effects can be achieved.

[0478] Specifically, an embodiment of the present application further provides a network-side device. As Figure 21 shown, the network-side device 2100 includes: an antenna 2101, a radio frequency device 2102, a baseband device 2103, a processor 2104, and a memory 2105. The antenna 2101 is connected to the radio frequency device 2102. In the uplink direction, the radio frequency device 2102 receives information through the antenna 2101 and sends the received information to the baseband device 2103 for processing. In the downlink direction, the baseband device 2103 processes the information to be sent and sends it to the radio frequency device 2102. After processing the received information, the radio frequency device 2102 sends it out through the antenna 2101.

[0479] The method executed by the network-side device in the above embodiments can be implemented in the baseband device 2103, and the baseband device 2103 includes a baseband processor.

[0480] The baseband device 2103 may include, for example, at least one baseband board, and multiple chips are provided on the baseband board. As Figure 21 shown, one of the chips is, for example, a baseband processor, which is connected to the memory 2105 through a bus interface to call the program in the memory 2105 and execute the operations of the network-side device shown in the above method embodiments.

[0481] The network-side device may further include a network interface 2106, and this interface is, for example, a Common Public Radio Interface (CPRI).

[0482] Specifically, the network-side device 2100 in the embodiment of the present application further includes: instructions or programs stored on the memory 2105 and executable on the processor 2104. The processor 2104 calls the instructions or programs in the memory 2105 to execute Figure 17 the methods executed by the shown modules and achieve the same technical effects. To avoid repetition, it will not be elaborated here.

[0483] The embodiment of the present application further provides a readable storage medium, and programs or instructions are stored on the readable storage medium. When the programs or instructions are executed by a processor, the various processes of the method embodiments shown above are implemented, and the same technical effects can be achieved. To avoid repetition, it will not be elaborated here. Figure 15 or Figure 16 The various processes of the method embodiments shown above, and the same technical effects can be achieved. To avoid repetition, it will not be elaborated here.

[0484] Among them, the processor is the processor in the terminal described in the above embodiments. The readable storage medium includes computer-readable storage media, such as computer read-only memory ROM, random access memory RAM, magnetic disks, or optical discs, etc. In some examples, the readable storage medium may be a non-transitory readable storage medium.

[0485] Another embodiment of the present application provides a chip, which includes a processor and a communication interface. The communication interface is coupled to the processor, and the processor is configured to run programs or instructions to implement the above Figure 15 or Figure 16 each process of the method embodiment shown, and can achieve the same technical effects. To avoid repetition, it will not be elaborated here.

[0486] It should be understood that the chip mentioned in the embodiments of the present application may also be referred to as a system-on-chip, system chip, chip system, or system-on-chip, etc.

[0487] Another embodiment of the present application provides a computer program / program product. 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 above Figure 15 or Figure 16 each process of the method embodiment shown, and can achieve the same technical effects. To avoid repetition, it will not be elaborated here.

[0488] The embodiment of the present application further provides a wireless communication system, including: a first communication device and a second communication device. The first communication device can be used to execute Figure 15 the steps of the method embodiment shown, and the second communication device can be used to execute Figure 16 the steps of the method embodiment shown.

[0489] It should be noted that in this article, the term "including", "comprising", or any other variation thereof is intended to cover non-exclusive inclusion, so that a process, method, article, or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or further includes elements inherent to such process, method, article, or device. Without further limitation, an element defined by the statement "including a..." does not exclude the existence of additional identical elements in the process, method, article, or device including that element. In addition, it should be pointed out that the methods and devices in the embodiments of the present application are not limited to performing functions in the order shown or discussed. They may also include performing functions in a substantially simultaneous manner or in the reverse order according to the functions involved. For example, the described methods may be performed in an order different from that described, and various steps may be added, omitted, or combined. Additionally, the features described with reference to certain examples may be combined in other examples.

[0490] Through the description of the above embodiments, those skilled in the art can clearly understand that the above embodiment methods can be implemented by means of computer software products plus the necessary general hardware platforms, and of course, they can also be implemented by hardware. The computer software products are stored in storage media (such as ROM, RAM, magnetic disks, optical disks, etc.), and include several instructions for enabling the terminal or the network-side device to execute the methods described in various embodiments of the present application.

[0491] 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 specific embodiments. The above specific embodiments are merely illustrative rather than restrictive. Under the inspiration of the present application, those of ordinary skill in the art can also make many forms of embodiments without departing from the purpose of the present application and the scope protected by the claims. These embodiments are all within the protection scope of the present application.

Claims

1. A signal transmission method, characterized in that, Including: A first communication device obtains sensing requirement information, where the sensing requirement information is sensing information required by a sensing service initiator; When the first communication device meets a first condition, it determines first information, where the first information is used to instruct a second communication device to perform a handover of transmission configuration information; The first communication device sends the first information; Wherein, the first condition includes at least one of the following: The first signal sent by the second communication device is not detected within a first duration; The first signal is not detected during N sensing measurement processes, where N is greater than or equal to 1; An interference measurement quantity of a coexisting device of the second communication device is greater than or equal to a first threshold; A sensing cascaded channel quality in which the second communication device participates in sensing is less than or equal to a second threshold; A sensing metric is less than or equal to a third threshold; A measurement quantity of a reference signal reported by the second communication device is less than or equal to a fourth threshold; An energy shortage information reported by the second communication device is received; Determine a transmit power to be adjusted for the second communication device according to a power headroom report; The sensing requirement information changes; The sensing parameter configuration information changes.

2. The method according to claim 1, wherein The sensing metric includes at least one of the following: Sensing signal-to-noise ratio; sensing signal power to interference plus noise ratio; sensing reference signal received power; sensing received signal strength indication; sensing reference signal received quality; sensing sensitivity.

3. The method according to claim 1 or 2, characterized in that, The power headroom report is determined according to at least one of an equivalent isotropic radiated power of the second communication device for sending the first signal, a reference signal received power of the second communication device for measuring a second signal, and device parameters of the second communication device, where the second signal is a carrier signal sent by the first communication device or a third communication device.

4. The method according to any one of claims 1 to 3, characterized in that, The sensing requirement information includes environmental information within a sensing range or characteristic information of a sensing target within the sensing range.

5. The method according to any one of claims 1 to 4, characterized in that, The sensing parameter configuration information includes at least one of the following: Sensing resources; sensing waveforms; subcarrier spacing; cyclic prefix duration; modulation rate; coding rate; modulation and coding strategy.

6. The method according to any one of claims 1 to 5, characterized in that, Before the first communication device determines the first information, the method further includes: The first communication device receives capability information of the second communication device; Wherein, the capability information includes at least one of the following: Energy storage capability information; Amplification capability information; Frequency translation capability information; Self-sensing capability information; Sideband suppression capability information; Carrier generation capability information; Measurement capability information; Duplex capability information; Antenna capability information.

7. The method according to any one of claims 1 to 6, characterized in that The first communication device sending the first information includes: The first communication device indicates the first information in a predefined manner, or indicates the first information through control information, or indicates the first information in an implicit manner; Wherein, the predefined manner includes a change in sensing parameter configuration information or a change in a modulation mode of the second communication device; The implicit manner includes at least one of the following: Modulation and coding strategy, carrier type, sequence type, preamble type, preamble length, power level.

8. The method according to any one of claims 1 to 7, characterized in that The transmission configuration information includes transmission parameters or a transmission mode; Among them, the transmission parameters include at least one of energy storage parameters, amplification parameters, frequency shifting parameters, self-sensing parameters, sideband suppression parameters, measurement parameters, duplex parameters, and antenna parameters; The transmission mode includes a passive transmission mode or an active transmission mode.

9. The method according to any one of claims 1 to 8, characterized in that, The first signal is actively generated by the second communication device, or the first signal is generated based on a second signal, and the second signal is a carrier signal sent by the first communication device or the third communication device.

10. The method according to any one of claims 1 to 9, characterized in that, The method further includes: The first communication device sends second information, and the second information is used to indicate that there is a conflict between the second communication device and other communication devices.

11. The method according to claim 10, wherein The second information includes the first information.

12. A signal transmission method, characterized in that, It includes: The second communication device switches the transmission configuration information when receiving the first information or meeting the second condition; The second communication device sends a first signal based on the switched transmission configuration information; Among them, the second condition includes at least one of the following: No control information is received within a second time period; The measured value of the reference signal is less than or equal to a fifth threshold; The energy of the energy storage capacitor is less than or equal to a sixth threshold.

13. The method according to claim 12, characterized in that After the second communication device switches the transmission configuration information when meeting the second condition, the method further includes: The second communication device reports the switched transmission configuration information.

14. The method according to claim 12, wherein Before the second communication device switches the transmission configuration information when receiving the first information, the method further includes: The second communication device reports the capability information of the second communication device.

15. The method according to claim 14, characterized in that, The capability information of the second communication device includes at least one of the following: Energy storage capability information; Amplification capability information; Frequency shifting capability information; Self-sensing capability information; Sideband suppression capability information; Carrier generation capability information; Measurement capability information; Duplex capability information; Antenna capability information.

16. The method according to any one of claims 12 to 15, characterized in that The first information is indicated by a predefined method, or by control information, or by an implicit method; Among them, the predefined method includes a change in sensing parameter configuration information or a change in the modulation method of the second communication device; The implicit method includes at least one of the following: Modulation and coding strategy, carrier type, sequence type, preamble type, preamble length, power level.

17. The method according to any one of claims 12 to 16, characterized in that, The transmission configuration information includes transmission parameters or a transmission mode; Among them, the transmission parameters include at least one of energy storage parameters, amplification parameters, frequency shifting parameters, self-sensing parameters, sideband suppression parameters, measurement parameters, duplex parameters, and antenna parameters; The transmission mode includes a passive transmission mode or an active transmission mode.

18. The method according to any one of claims 12 to 17, characterized in that, The first signal is actively generated by the second communication device, or the first signal is generated by the second communication device based on the received second signal.

19. The method according to any one of claims 12 to 18, characterized in that, Before the second communication device switches the transmission configuration information when receiving the first information or meeting the second condition, the method further includes: The second communication device receives second information, and the second information is used to indicate that there is a conflict between the second communication device and other communication devices.

20. The method according to claim 19, wherein After the second communication device receives the second information, the method further includes: The second communication device re-competes for access and participates in sensing.

21. The method according to claim 19, wherein The second information includes the first information.

22. The method according to claim 19, wherein When the second communication device receives the first information or meets the second condition, it switches the transmission configuration information, including: If the second communication device does not receive the first information within a third time period, the second communication device switches the transmission configuration information when it meets the second condition.

23. A signal transmission device, characterized in that, Including: An obtaining module, configured to obtain sensing requirement information, where the sensing requirement information is the sensing information required by the sensing service initiator; A determining module, configured to determine first information when a first condition is met, where the first information is used to instruct the second communication device to switch the transmission configuration information; A first sending module, configured to send the first information; Wherein, the first condition includes at least one of the following: The first signal sent by the second communication device is not detected within a first time period; The first signal is not detected during N sensing measurement processes, where N is greater than or equal to 1; The interference measurement amount of the coexisting device of the second communication device is greater than or equal to a first threshold; The sensing cascaded channel quality in which the second communication device participates is less than or equal to a second threshold; The sensing index is less than or equal to a third threshold; The measurement amount of the reference signal reported by the second communication device is less than or equal to a fourth threshold; The insufficient energy information reported by the second communication device is received; It is determined that the second communication device needs to adjust the transmission power according to the power headroom report; The sensing requirement information changes; The sensing parameter configuration information changes.

24. The device according to claim 23, characterized in that, The signal transmission device further includes a first receiving module, configured to: Receive the capability information of the second communication device before determining the first information; Wherein, the capability information includes at least one of the following: Energy storage capability information; Amplification capability information; Frequency shifting capability information; Self-sensing capability information; Sideband suppression capability information; Carrier generation capability information; Measurement capability information; Duplex capability information; Antenna capability information.

25. The device according to claim 23 or 24, characterized in that, The first sending module is specifically configured to: Indicate the first information in a predefined manner, or indicate the first information through control information, or indicate the first information in an implicit manner; Wherein, the predefined manner includes a change in the sensing parameter configuration information or a change in the modulation mode of the second communication device; The implicit manner includes at least one of the following: Modulation and coding strategy, carrier type, sequence type, preamble type, preamble length, power level.

26. The device according to any one of claims 23 to 25, characterized in that, The first sending module is further configured to: Send second information, where the second information is used to indicate that the second communication device has a conflict with other communication devices.

27. A signal transmission device, characterized in that, Including: A switching module, configured to switch the transmission configuration information when receiving the first information or meeting the second condition; A second sending module, configured to send a first signal based on the switched transmission configuration information; Wherein, the second condition includes at least one of the following: The control information is not received within a second time period; The measurement amount of the reference signal is less than or equal to a fifth threshold; The energy of the energy storage capacitor is less than or equal to a sixth threshold.

28. The device according to claim 27, wherein The second sending module is further configured to: After switching the transmission configuration information when the second condition is met, report the switched transmission configuration information.

29. The device according to claim 27, wherein The second sending module is further configured to: report the capability information of the second communication device before switching the transmission configuration information when the first information is received.

30. The device according to any one of claims 27 to 29, characterized in that, The information transmission device further includes a second receiving module, configured to: receive second information before switching the transmission configuration information when the first information is received or the second condition is satisfied, where the second information is used to indicate that there is a conflict between the second communication device and other communication devices.

31. The device according to claim 30, characterized in that, The information transmission device further includes a contention module, configured to: re-contend for access participation sensing after receiving the second information.

32. A communication device, characterized in that, comprising a processor and a memory, the memory stores programs or instructions that can be run on the processor, and when the programs or instructions are executed by the processor, the steps of the signal transmission method according to any one of claims 1 to 22 are implemented.

33. A readable storage medium, characterized in that, Programs or instructions are stored on the readable storage medium, and when the programs or instructions are executed by the processor, the steps of the signal transmission method according to any one of claims 1 to 22 are implemented.

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