CN116918262A - Wireless communication method, terminal equipment and network equipment - Google Patents

Abstract

A wireless communication method, terminal equipment and network equipment are beneficial to reducing the backscattering communication time limit of the terminal equipment and reducing communication delay. The method includes: a first terminal receiving a first signal sent by a network device, where the first signal is a modulated signal; the first terminal modulating the first signal to obtain a second signal; A terminal sends the second signal to the network device.

Description

Wireless communication method, terminal equipment and network equipment Technical field

Embodiments of the present application relate to the field of communications, and specifically relate to a wireless communication method, terminal equipment, and network equipment.

Background technique

With the development of science and technology, the application of zero-power devices is becoming more and more widespread. A typical zero-power device is a tag in radio frequency identification (Radio Frequency Identification, RFID) technology. The tag transmits the unmodulated The carrier signal (i.e., the energy supply signal) is modulated to carry information and is sent to the reader.

When zero-power devices are used in the cellular passive Internet of Things, the zero-power devices can collect energy and backscatter through the energy supply signal sent by the base station to achieve information transmission. However, the energy supply signal sent by the base station is not always an unmodulated carrier signal. It is often modulated by the information that the base station needs to send. In this case, how the zero-power terminal sends information to the base station is an urgent solution. The problem.

Contents of the invention

The present application provides a wireless communication method, terminal equipment and network equipment, which is beneficial to reducing the time limit for the terminal equipment to perform backscatter communication and reducing the communication delay of the terminal equipment.

In a first aspect, a wireless communication method is provided, including: a first terminal receiving a first signal sent by a network device, where the first signal is a modulated signal; the first terminal Modulation is performed to obtain a second signal; the first terminal sends the second signal to the network device.

In a second aspect, a wireless communication method is provided, including: a first terminal receiving a first signal sent by a network device; the first terminal determining whether the first signal has been modulated, and determining whether the first signal has been modulated. The target modulation method used for modulation; the first terminal modulates the first signal to obtain a second signal; the first terminal backscatters the second signal to the network device.

In a third aspect, a wireless communication method is provided, including: a network device sends a first signal to a first terminal, where the first signal is a modulated signal; the network device receives a signal sent by the first terminal. The second signal is obtained by modulating the first signal by the first terminal.

A fourth aspect provides a terminal device for executing the method in any one of the above-mentioned first to second aspects or respective implementations thereof. Specifically, the terminal device includes a functional module for executing any one of the above-mentioned first to second aspects or the method in each implementation thereof.

A fifth aspect provides a network device for performing the method in the above third aspect or its respective implementations. Specifically, the network device includes a functional module for executing the method in the above third aspect or its respective implementations.

In a sixth aspect, a terminal device is provided, including a processor and a memory. The memory is used to store computer programs, and the processor is used to call and run the computer programs stored in the memory, and execute any one of the above-mentioned first to second aspects or the methods in their respective implementations.

A seventh aspect provides a network device, including a processor and a memory. The memory is used to store computer programs, and the processor is used to call and run the computer programs stored in the memory, and execute the method in the above third aspect or its respective implementations.

An eighth aspect provides a chip for implementing any one of the above-mentioned first to third aspects or the method in each implementation manner thereof. Specifically, the chip includes: a processor, configured to call and run a computer program from a memory, so that the device installed with the device executes any one of the above-mentioned first to third aspects or implementations thereof. method.

A ninth aspect provides a computer-readable storage medium for storing a computer program, the computer program causing the computer to execute any one of the above-mentioned first to third aspects or the method in each implementation thereof.

In a tenth aspect, a computer program product is provided, including computer program instructions that enable a computer to execute any one of the above-mentioned first to third aspects or the methods in each implementation thereof.

An eleventh aspect provides a computer program that, when run on a computer, causes the computer to execute any one of the above-mentioned first to third aspects or the method in each implementation thereof.

Through the above technical solution, the first terminal can use the modulated signal sent by the network device to perform backscatter communication, so that the first terminal does not have to wait to receive an unmodulated signal before performing backscatter communication, which is beneficial to reducing the burden on the terminal. Limit the time the device can perform backscatter communication to reduce the communication delay of the terminal device.

Description of the drawings

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

FIG. 2 is a schematic diagram of a zero-power communication system according to an example of the present application.

Figure 3 is a schematic diagram of backscatter communication.

Figure 4 is a schematic diagram of energy harvesting.

Figure 5 is the circuit schematic diagram of resistive load modulation.

Figure 6 is a schematic interaction diagram of a wireless communication method provided according to an embodiment of the present application.

Figure 7 is a schematic interaction diagram of backscatter communication based on an embodiment of the present application.

Figure 8 is a schematic interaction diagram of a wireless communication method according to an embodiment of the present application.

Figure 9 is a schematic interaction diagram of a wireless communication method according to another embodiment of the present application.

Figure 10 is a schematic interaction diagram of another wireless communication method provided according to an embodiment of the present application.

Figure 11 is a schematic block diagram of a terminal device provided according to an embodiment of the present application.

Figure 12 is a schematic block diagram of another terminal device provided according to an embodiment of the present application.

Figure 13 is a schematic block diagram of a network device provided according to an embodiment of the present application.

Figure 14 is a schematic block diagram of a communication device provided according to an embodiment of the present application.

Figure 15 is a schematic block diagram of a chip provided according to an embodiment of the present application.

Figure 16 is a schematic block diagram of a communication system provided according to an embodiment of the present application.

Detailed ways

The technical solutions in the embodiments of the present application will be described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, but not all of the embodiments. Regarding the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the scope of protection of this application.

The technical solutions of the embodiments of the present application can be applied to various communication systems, such as: Global System of Mobile communication (GSM) system, Code Division Multiple Access (Code Division Multiple Access, CDMA) system, broadband code division multiple access (Wideband Code Division Multiple Access, WCDMA) system, General Packet Radio Service (GPRS), Long Term Evolution (LTE) system, Advanced long term evolution (LTE-A) system , New Radio (NR) system, evolution system of NR system, LTE (LTE-based access to unlicensed spectrum, LTE-U) system on unlicensed spectrum, NR (NR-based access to unlicensed spectrum) unlicensed spectrum (NR-U) system, Non-Terrestrial Networks (NTN) system, Universal Mobile Telecommunication System (UMTS), Wireless Local Area Networks (WLAN), wireless fidelity (Wireless Fidelity, WiFi), fifth-generation communication (5th-Generation, 5G) system, cellular Internet of Things system, cellular passive Internet of Things system or other communication systems, etc.

Generally speaking, traditional communication systems support a limited number of connections and are easy to implement. However, with the development of communication technology, mobile communication systems will not only support traditional communication, but also support, for example, Device to Device (Device to Device, D2D) communication, Machine to Machine (M2M) communication, Machine Type Communication (MTC), Vehicle to Vehicle (V2V) communication, or Vehicle to everything (V2X) communication, etc. , the embodiments of the present application can also be applied to these communication systems.

Optionally, the communication system in the embodiment of the present application can be applied to a carrier aggregation (Carrier Aggregation, CA) scenario, a dual connectivity (Dual Connectivity, DC) scenario, or a standalone (Standalone, SA) deployment scenario. Internet scene.

Optionally, the communication system in the embodiment of the present application can be applied to the unlicensed spectrum, where the unlicensed spectrum can also be considered as a shared spectrum; or the communication system in the embodiment of the present application can also be applied to the licensed spectrum, where, Licensed spectrum can also be considered as unshared spectrum.

The embodiments of this application describe various embodiments in combination with network equipment and terminal equipment. The terminal equipment may also be called user equipment (User Equipment, UE), access terminal, user unit, user station, mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, terminal, wireless communication equipment, user agent or user device, etc.

In this embodiment of the present application, the network device may be a device used to communicate with mobile devices, and the network device may be an Access Point (AP) in WLAN, or a Base Station (Base Transceiver Station, BTS) in GSM or CDMA. , it can also be a base station (NodeB, NB) in WCDMA, or an evolutionary base station (Evolutional Node B, eNB or eNodeB) in LTE, or a relay station or access point, or a vehicle-mounted device, a wearable device, and an NR network Network equipment (gNB) or network equipment in the cellular Internet of Things, or network equipment in the cellular passive Internet of Things, or network equipment in the future evolved PLMN network or network equipment in the NTN network, etc.

As an example and not a limitation, in the embodiment of the present application, the network device may have mobile characteristics, for example, the network device may be a mobile device. Optionally, the network device can be a satellite or balloon station. For example, the satellite may be a low earth orbit (LEO) satellite, a medium earth orbit (MEO) satellite, a geostationary earth orbit (GEO) satellite, or a high elliptical orbit (HEO) satellite. ) satellite, etc. Optionally, the network device may also be a base station installed on land, water, or other locations.

In this embodiment of the present application, network equipment can provide services for a cell, and terminal equipment communicates with the network equipment through transmission resources (for example, frequency domain resources, or spectrum resources) used by the cell. The cell can be a network equipment ( For example, a cell corresponding to a base station). The cell can belong to a macro base station or a base station corresponding to a small cell. The small cell here can include: urban cell (Metro cell), micro cell (Micro cell), pico cell ( Pico cell), femto cell (Femto cell), etc. These small cells have the characteristics of small coverage and low transmission power, and are suitable for providing high-rate data transmission services.

The terminal device can be a station (STATION, ST) in the WLAN, and can be a cellular phone, a cordless phone, a Session Initiation Protocol (Session Initiation Protocol, SIP) phone, a wireless local loop (Wireless Local Loop, WLL) station, or a personal digital assistant. (Personal Digital Assistant, PDA) devices, handheld devices with wireless communication capabilities, computing devices or other processing devices connected to wireless modems, vehicle-mounted devices, wearable devices, next-generation communication systems such as terminal devices in NR networks, or in the future Terminal equipment in the evolved Public Land Mobile Network (PLMN) network, terminal equipment in the cellular Internet of Things, terminal equipment in the cellular passive Internet of Things, etc.

In the embodiment of this application, the terminal device can be deployed on land, including indoor or outdoor, handheld, wearable or vehicle-mounted; it can also be deployed on water (such as ships, etc.); it can also be deployed in the air (such as aircraft, balloons and satellites). superior).

In the embodiment of this application, the terminal device may be a mobile phone (Mobile Phone), a tablet computer (Pad), a computer with wireless transceiver function, a virtual reality (Virtual Reality, VR) terminal device, or an augmented reality (Augmented Reality, AR) terminal. Equipment, wireless terminal equipment in industrial control, wireless terminal equipment in self-driving, wireless terminal equipment in remote medical, wireless terminal equipment in smart grid , wireless terminal equipment in transportation safety, wireless terminal equipment in smart city, or wireless terminal equipment in smart home, etc.

As an example and not a limitation, in this embodiment of the present application, the terminal device may also be a wearable device. Wearable devices can also be called wearable smart devices. It is a general term for applying wearable technology to intelligently design daily wear and develop wearable devices, such as glasses, gloves, watches, clothing and shoes, etc. A wearable device is a portable device that is worn directly on the body or integrated into the user's clothing or accessories. Wearable devices are not just hardware devices, but also achieve powerful functions through software support, data interaction, and cloud interaction. Broadly defined wearable smart devices include full-featured, large-sized devices that can achieve complete or partial functions without relying on smartphones, such as smart watches or smart glasses, and those that only focus on a certain type of application function and need to cooperate with other devices such as smartphones. Use, such as various types of smart bracelets, smart jewelry, etc. for physical sign monitoring.

Exemplarily, the communication system 100 applied in the embodiment of the present application is shown in Figure 1 . The communication system 100 may include a network device 110, which may be a device that communicates with a terminal device 120 (also referred to as a communication terminal or terminal). The network device 110 can provide communication coverage for a specific geographical area and can communicate with terminal devices located within the coverage area.

Figure 1 exemplarily shows one network device and two terminal devices. Optionally, the communication system 100 may include multiple network devices and the coverage of each network device may include other numbers of terminal devices. This application The embodiment does not limit this.

Optionally, the communication system 100 may also include other network entities such as a network controller and a mobility management entity, which are not limited in this embodiment of the present application.

It should be understood that in the embodiments of this application, devices with communication functions in the network/system may be called communication devices. Taking the communication system 100 shown in Figure 1 as an example, the communication device may include a network device 110 and a terminal device 120 with communication functions. The network device 110 and the terminal device 120 may be the specific devices described above, which will not be described again here. ; The communication device may also include other devices in the communication system 100, such as network controllers, mobility management entities and other network entities, which are not limited in the embodiments of this application.

It should be understood that the terms "system" and "network" are often used interchangeably herein. The term "and/or" in this article is just an association relationship that describes related objects, indicating that three relationships can exist. For example, A and/or B can mean: A exists alone, A and B exist simultaneously, and they exist alone. B these three situations. In addition, the character "/" in this article generally indicates that the related objects are an "or" relationship.

It should be understood that the "instruction" mentioned in the embodiments of this application may be a direct instruction, an indirect instruction, or an association relationship. For example, A indicates B, which can mean that A directly indicates B, for example, B can be obtained through A; it can also mean that A indirectly indicates B, for example, A indicates C, and B can be obtained through C; it can also mean that there is an association between A and B. relation.

In the description of the embodiments of this application, the term "correspondence" can mean that there is a direct correspondence or indirect correspondence between the two, it can also mean that there is an associated relationship between the two, or it can mean indicating and being instructed, configuration and being. Configuration and other relationships.

In the embodiment of this application, "predefinition" can be achieved by pre-saving corresponding codes, tables or other methods that can be used to indicate relevant information in devices (for example, including terminal devices and network devices). This application is specific to its The implementation method is not limited. For example, predefined can refer to what is defined in the protocol.

In the embodiment of this application, the "protocol" may refer to a standard protocol in the communication field, which may include, for example, LTE protocol, NR protocol, and related protocols applied in future communication systems. This application does not limit this.

In order to facilitate understanding of the technical solutions of the embodiments of the present application, the relevant technologies of the present application will be described.

1. Zero power consumption equipment

A typical zero-power device is an RFID tag. RFID technology is a technology that uses the spatial coupling of radio frequency signals to achieve contactless automatic transmission and identification of tag information. RFID tags are also called "radio frequency tags" or "electronic tags". The types of electronic tags classified according to different power supply methods may include, for example, active electronic tags, passive electronic tags and semi-passive electronic tags. Active electronic tags, also known as active electronic tags, mean that the energy for the operation of the electronic tag is provided by the battery. The battery, memory and antenna together constitute an active electronic tag. Different from the passive radio frequency activation method, it passes through the battery until the battery is replaced. Set the frequency band to send messages. Passive electronic tags, also known as passive electronic tags, do not support built-in batteries. When a passive electronic tag is close to a reader, the tag is within the near field range formed by the radiation of the reader's antenna. The electronic tag antenna generates an induced current through electromagnetic induction. , the induced current drives the electronic tag chip circuit. The chip circuit sends the identification information stored in the tag to the reader through the electronic tag antenna. Semi-active electronic tags inherit the advantages of passive electronic tags such as small size, light weight, low price and long service life. The built-in battery only provides power for a few circuits in the chip when there is no reader/writer access. When the reader is accessing, the built-in battery supplies power to the RFID chip to increase the reading and writing distance of the tag and improve the reliability of communication.

As shown in Figure 2, the most basic RFID system includes electronic tags (TAG) and readers/writers (Reader/Writer). The electronic tag is composed of coupling components and chips. For example, the electronic tag can include an energy collection module, a backscatter communication module, a low-power computing module and a sensor module. Each electronic tag has a unique electronic code and is placed on the target to mark the target object. The reader/writer can not only read the information on the electronic tag, but also write the information on the electronic tag, and at the same time provide the electronic tag with the energy required for communication. as shown in picture 2. After the electronic tag enters the electromagnetic field, it receives the radio frequency signal from the reader. Passive or semi-passive electronic tags can use the energy obtained from the electromagnetic field generated in space to transmit the information stored in the electronic tag. The reader reads the electronic tag. The information transmitted by the tag is decoded to identify the electronic tag.

2. Zero-power communication

In the embodiments of this application, communication based on zero-power consumption devices is referred to as zero-power communication (or battery-free communication). The following describes the key technologies in zero-power communication.

1. Back Scattering

As shown in Figure 3, the zero-power device (backscatter tag in Figure 3) receives the carrier signal sent by the backscatter reader, collects energy through the energy collection module, and then passes the low-power processing module (in the figure) Logic processing module) modulates the incoming wave signal and performs backscattering.

The main characteristics of backscatter communication are as follows:

(1) The terminal does not actively transmit signals and achieves backscattering communication by modulating the incoming wave signal;

(2) The terminal does not rely on traditional active power amplifier transmitters and uses low-power computing modules to greatly reduce hardware complexity;

(3) Battery-free communication can be achieved when combined with the energy harvesting module.

2. Energy Harvesting (RF Power Harvesting)

Figure 4 is a schematic diagram of energy harvesting. The energy collection module is used to collect space electromagnetic wave energy through electromagnetic induction, and then drive the load circuit (low-power computing, sensors, etc.), thereby achieving battery-free communication.

3. Load modulation

Load modulation is a method often used by electronic tags to transmit data to readers. Load modulation adjusts the electrical parameters of the electronic tag's oscillation circuit according to the rhythm of the data flow, so that the size and phase of the electronic tag's impedance change accordingly, thereby completing the modulation process. Load modulation technology mainly includes resistive load modulation and capacitive load modulation.

Figure 5 is a schematic diagram of resistive load modulation. In resistive load modulation, the load is connected in parallel with a resistor, called the load modulation resistor, which is turned on and off according to the clock of the data flow. The on and off of the switch S is controlled by binary data encoding.

In capacitive load modulation, a capacitor is connected in parallel with the load, replacing the load modulation resistor controlled by a binary data encoding in Figure 5.

4. Encoding

The data transmitted by electronic tags can use different forms of codes to represent binary "1" and "0". Radio frequency identification systems usually use one of the following encoding methods: reverse non-return to zero (NRZ) encoding, Manchester encoding, unipolar return to zero (Unipolar RZ) encoding, differential biphase (DBP) encoding, Miller encoding spread dynamic encoding. Generally speaking, different pulse signals are used to represent 0 and 1.

3. Cellular Passive IoT

With the increase in 5G industry applications, there are more and more types and application scenarios of connected things, and there will be higher requirements for the cost and power consumption of communication terminals. The application of battery-free, low-cost passive IoT devices has become a growing trend in cellular The key technologies of the Internet of Things will enrich the type and number of 5G network link terminals and truly realize the interconnection of all things.

In RFID technology, backscatter communication means that the tag modulates the unmodulated carrier signal sent by the reader to carry information and sends it to the reader. The unmodulated carrier signal is a continuous wave (CW), such as a sine wave. After being modulated by the tag, the amplitude or phase of the CW changes according to the specific modulation method to carry the information. During the information interaction process between the reader and the tag, the modulation of the CW by the reader and the modulation of the CW by the tag do not occur at the same time, that is, the information interaction between the two occurs alternately in time. That is, the tag modulates the unmodulated carrier wave sent by the reader to carry the information to be sent.

However, when zero-power devices are used in cellular passive IoT, the zero-power devices can harvest and backscatter energy through the energy supply signal sent by the base station. But the power supply signal sent by the base station is not always an unmodulated carrier signal. The energy supply signal sent by the base station serves the zero-power consumption equipment of the cell. It is often modulated by the information that the base station needs to send. If the modulated energy supply signal cannot be used for backscatter communication of zero-power consumption equipment, This will cause greater restrictions on the backscatter communication of zero-power devices. For example, zero-power devices cannot transmit information simultaneously with the base station. In this case, how the zero-power device sends information to the network device is an issue that needs to be solved urgently.

The technical solutions of the present application are described in detail below through specific examples. The above related technologies can be arbitrarily combined with the technical solutions of the embodiments of the present application as optional solutions, and they all fall within the protection scope of the embodiments of the present application. The embodiments of this application include at least part of the following contents.

Figure 6 is a schematic interaction diagram of a wireless communication method 200 according to an embodiment of the present application. As shown in Figure 6, the method 200 includes the following content:

S201. The first terminal receives the first signal sent by the network device, where the first signal is a modulated signal;

S202: The first terminal modulates the first signal to obtain a second signal;

S203: The first terminal sends the second signal to the network device.

In some embodiments, the first terminal may communicate with the network device through a zero-power communication method.

Optionally, the zero-power communication may include backscatter communication, or may include other passive or semi-passive communication methods, and the application is not limited thereto.

In some embodiments, the first terminal is a zero-power consumption terminal, or other terminal that does not actively transmit signals but uses signals sent by network devices to carry information.

In some embodiments, the power supply mode of the first terminal may be a passive or semi-passive mode.

In some embodiments, the zero-power consumption terminal may be based on the aforementioned RFID technology, or may also be based on other related or technologies introduced in subsequent standard evolutions for zero-power communication or low-power communication. Hereinafter, the terminal The device communicates with the network device through backscatter communication as an example for description, but the application is not limited to this.

In some embodiments, the first terminal uses the signal modulated by the network device to perform backscatter communication to carry the information to be sent.

In this embodiment of the present application, the first signal may also be called an energy supply signal or an incoming wave signal, that is, the first signal may be used to supply energy to the first terminal so that the first terminal supplies energy to the network. The device sends backscattered signals to transmit information.

In some embodiments, the network device may refer to a base station, or may also be a smartphone, a smart gateway, a charging station, a micro base station, etc.

In some embodiments, the first signal may be a low frequency signal, an intermediate frequency signal or a high frequency signal.

In some embodiments, the first signal may be modulated by signals such as Zhengxuan wave, square wave, triangle wave, pulse or rectangular wave.

In some embodiments, the first signal may be a continuous wave or a discontinuous wave.

In some embodiments, the first signal may be any signal or channel, such as a Sounding Reference Signal (SRS), a Physical Random Access Channel (PRACH), or a Physical Uplink Control Channel. (Physical Uplink Control Channel, PUCCH), Physical Uplink Shared Channel (PUSCH), Physical Downlink Control Channel (Physical Downlink Control Channel, PDCCH), Physical Downlink Shared Channel (PDSCH), physical layer Broadcast Channel (Physical Broadcast Channel, PBCH), etc.

It should be understood that the embodiments of the present application can be applied to cellular IoT systems, such as cellular passive IoT systems, or can also be applied to other scenarios where terminal devices send information to network devices through zero-power communication or battery-free communication. The application is not limited to this.

In some embodiments, the first terminal may determine whether the first signal is a modulated signal according to the received first signal. For example, the first terminal may determine whether the first signal is a modulated signal based on at least one of envelope information, frequency information and phase information of the first signal.

As an example, the first terminal may detect envelope information of the first signal and determine whether the first signal is ASK modulated.

As another example, the first terminal may detect the frequency information of the first signal and determine whether the first signal is FSK modulated.

As another example, the first terminal may detect the phase information of the first signal and determine whether the first signal is PSK modulated.

In other embodiments, the first terminal may also determine whether the first signal is a modulated signal according to the indication information of the network device. For example, the network device may indicate a certain time range to the first terminal. Whether the signal sent within is modulated.

It should be understood that in this embodiment of the present application, when the first signal is a modulated signal, the modulation method used by the first terminal to modulate the first signal needs to meet certain constraints. , or certain constraints need to be met between the modulation mode used by the first terminal to modulate the first signal and the modulation mode used by the network device to obtain the first signal, so that the first The second signal backscattered by the terminal can be correctly demodulated by the network device.

The method for determining the target modulation method used by the first terminal to modulate the first signal will be described below with reference to specific embodiments.

Example 1:

The first terminal may determine the target modulation mode used by the first terminal to modulate the first signal according to the modulation mode used by the network device to obtain the first signal.

In this embodiment of the present application, the first terminal may modulate the first signal using the target modulation method to carry information to be sent by the first terminal to the network device.

It should be understood that the modulation methods in the embodiments of this application include but are not limited to amplitude keying (ASK), frequency shift keying (FSK), phase shift keying (PSK), or may also include other modulations introduced in the evolution of standards. method, this application is not limited to this.

In some embodiments, if the first signal is modulated by the network device using a first modulation method, the first terminal may determine the second modulation method as the modulation method used to modulate the first signal. Target modulation method. That is, the first terminal may use the second modulation method to modulate the first signal to obtain the second signal.

In some embodiments, the second modulation method satisfies the following constraints: the network device demodulates the second signal based on the demodulation method corresponding to the second modulation method to obtain the content carried in the second signal. information.

In some embodiments, the second modulation method is different from the first modulation method. For example, the first modulation mode is a modulation mode that is not used by the first terminal, or a modulation mode that is not supported.

In some embodiments, the first modulation mode and the second modulation mode are associated. The association between the first modulation mode and the second modulation mode may be predefined, or may be configured by a network device. .

In some embodiments, the first terminal determines the target modulation mode according to the modulation mode used by the network device to obtain the first signal and the first association relationship. Wherein, the first association relationship may be an association relationship between a modulation mode used by a network device and a modulation mode used by a terminal device, or an association relationship between a modulation mode used by a network device and a modulation mode used by a zero-power terminal, or, The relationship between the modulation scheme used by network equipment and the modulation scheme used for backscatter communications.

In some embodiments, the first association relationship may be predefined, or may be configured by a network device.

Optionally, in the first association relationship, the modulation mode used by the network device and the modulation mode used by the terminal device may be in one-to-one correspondence, or may be one-to-many, or many-to-one. There are no restrictions on this application. Table 1 is an example of the first association relationship according to the present application.

Table 1

Modulation method used by network equipment Modulation method used by terminal equipment ASK PSK PSK ASK FSK ASK ASK FSK

As an example, the first modulation method is ASK, and the second modulation method is PSK or FSK.

As another example, the first modulation method is PSK, and the second modulation method is ASK.

Figure 7 shows that the network device uses the ASK modulation method to modulate the first signal, and the first terminal further uses the FSK modulation method to modulate the first signal to obtain a second signal, and sends the second signal to the network device. schematic diagram.

In some embodiments of the present application, the method 200 further includes:

The first terminal determines the modulation mode used by the network device to obtain the first signal.

Method 1: The first terminal determines the modulation mode used by the network device to obtain the first signal based on the received first signal.

In some embodiments, the first terminal may determine the modulation used by the network device to obtain the first signal based on at least one of envelope information, frequency information and phase information of the received first signal. Way.

For example, the first terminal may detect the envelope information of the first signal and determine whether the first signal is ASK modulated.

For another example, the first terminal may detect the frequency information of the first signal and determine whether the first signal is FSK modulated.

For another example, the first terminal may detect the phase information of the first signal and determine whether the first signal is PSK modulated.

In some other embodiments, the first terminal demodulates the first signal according to demodulation modes corresponding to multiple modulation modes, and demodulates the first signal according to the demodulation modes corresponding to the multiple modulation modes. The demodulation result of the signal determines the modulation method used by the network device to obtain the first signal.

That is, the first terminal can blindly demodulate the first signal to determine the modulation mode corresponding to the first signal.

Method 2: The first terminal determines the modulation mode used by the network device to obtain the first signal according to the first indication information sent by the network device, wherein the first indication information is used to indicate the The modulation method used by network equipment.

In some embodiments, the first indication information is received by the first terminal before receiving the first signal. That is, before sending the first signal, the network device may indicate, through the first indication information, the modulation method used for subsequent signals to be sent.

Optionally, the first indication information may also be used to indicate a time range corresponding to the modulation mode adopted by the network device, that is, the network device adopts the modulation mode within this time range. Then, all signals received by the first terminal within this period of time can be considered to be modulated by the network device using this modulation method.

In some embodiments, the modulation method used by the network device to carry the signal of the first indication information may be a predefined modulation method, or a default modulation method.

In some embodiments, the network device and the first terminal use a predefined modulation method during initial communication. For example, the first indication information may be sent by the network device and the first terminal during initial communication.

In some embodiments, the initial communication may include the first terminal entering the coverage area of the network device and communicating with the network device for the first time, or may also include the first terminal interrupting and the network device After communicating with the device, communicate with the network device again.

Method 3: The first terminal determines that the network device modulates the first signal using a third modulation method, and the third modulation method is a predefined modulation method.

In some embodiments, the first terminal determines that the first signal sent by the network device is modulated using a predefined modulation method during initial communication.

Optionally, the number of the predefined modulation modes may be one, or may be multiple.

In some embodiments, the third modulation method is designed to be: a signal modulated by the third modulation method, and then a signal modulated and backscattered by any modulation method supported by the first terminal, and the network The equipment is capable of demodulating the backscattered signal.

In summary, as shown in Figure 8, Embodiment 1 may include the following steps:

S211. The network device sends the first signal to the first terminal.

S212. The first terminal determines the modulation mode used by the network device to obtain the first signal.

For example, the first terminal may determine the modulation method used by the network device to obtain the first signal according to the aforementioned method 1, method 2 or method 3.

S213: The first terminal determines the target modulation mode used by the first terminal to modulate the first signal according to the modulation mode used by the network device to obtain the first signal.

For example, if the network device obtains the first signal using the ASK modulation method, the first terminal may determine to use the FSK modulation method or the PSK modulation method to modulate the first signal.

S214: The first terminal modulates the first signal using the target modulation method to obtain a second signal. For example, the first terminal uses the target modulation method to modulate the first signal to obtain the second signal carrying information to be sent.

S215: The first terminal sends the second signal to the network device.

Further, the network device demodulates the second signal to obtain the information to be sent carried in the second signal.

Example 2:

The first terminal determines the target modulation mode used to modulate the first signal according to the second instruction information of the network device.

In some embodiments, the second indication information is used to indicate the modulation mode adopted by the first terminal and/or the time information of using the modulation mode. Alternatively, the second indication information is used to indicate the modulation mode used by the first terminal to perform backscatter communication and/or the time information of using the modulation mode.

Optionally, the time information of the modulation mode may include the start usage time and/or usage duration information of the modulation mode. That is, the time period during which the first terminal uses the modulation method can be determined based on the time information of the modulation method. For example, the first terminal may use the modulation method indicated by the second indication information to modulate the modulated signal sent by the network device within the time period corresponding to the modulation method.

In some embodiments of the present application, the method 200 further includes:

The first terminal reports first capability information to the network device, where the first capability information is used to indicate a modulation mode supported by the first terminal, or a modulation mode expected to be used by the first terminal.

In some embodiments, the first capability information may be sent by the network device and the first terminal during initial communication.

In some embodiments, the second indication information is determined by the network device based on the first capability information reported by the terminal device.

For example, if the network device supports ASK, PSK and FSK modulation modes, and the first terminal supports ASK and PSK modulation modes, the second indication information may be used to instruct the first terminal to adopt the ASK modulation mode and use the ASK modulation mode. time period, or the first terminal may also be instructed to adopt the PSK modulation method and the time period during which the PSK modulation method is used.

In some embodiments, during the time period corresponding to the modulation mode indicated by the second indication information, the network device does not use this modulation mode to modulate the energy supply signal to avoid the network device from demodulating the backscattered signal. affect. That is to say, the modulation method used by the network device based on the instruction of the first terminal and the modulation method used by the network device in the same time period do not affect the demodulation of the backscattered signal by the network device.

In some embodiments, the second indication information may be sent by the network device and the first terminal during initial communication.

In summary, as shown in Figure 9, Embodiment 2 may include the following steps:

S220: The first terminal reports the first capability information to the network device.

Further, the network device determines second indication information according to the first capability information.

S221. The network device sends second indication information to the first terminal.

S222. The network device sends the first signal to the first terminal.

S223: The first terminal determines the target modulation method used to modulate the first signal according to the second indication information.

For example, if the second indication information indicates that the first terminal adopts the ASK modulation mode, the first terminal may determine that the target modulation mode used to modulate the received modulated energy supply signal sent by the network device is ASK. Modulation.

S224: The first terminal modulates the first signal using the target modulation method to obtain a second signal. For example, the first terminal uses the target modulation method to modulate the first signal to obtain the second signal carrying information to be sent.

S225: The first terminal sends the second signal to the network device.

Further, the network device demodulates the second signal to obtain the information to be sent carried in the second signal.

Embodiment 3: The first terminal determines a fourth modulation mode as the target modulation mode used to modulate the first signal, and the fourth modulation mode is a predefined modulation mode.

In some embodiments, the first signal is modulated by the network device using a third modulation method, and the third modulation method is a predefined modulation method.

In some embodiments, the third modulation mode and the fourth modulation mode have an associated relationship, for example, at least one of the associated relationships in Table 1 is satisfied.

In some embodiments, the third modulation method and the fourth modulation method are designed such that the network device modulates the first modulation method using the third modulation method based on the demodulation method corresponding to the fourth modulation method. The signal is further modulated using the fourth modulation method and the second signal obtained is demodulated, so that the information carried in the second signal can be obtained.

In some embodiments of the present application, the method 200 includes:

The first terminal receives a third signal sent by the network device, where the third signal is an unmodulated signal;

The first terminal determines a target modulation method used to modulate the third signal;

The first terminal modulates the third signal to obtain a fourth signal, and backscatters the fourth signal to the network device.

For example, the first terminal may determine whether the third signal has been modulated according to envelope information, phase information or frequency information of the third signal.

In some embodiments, the first terminal may also determine whether the third signal has been modulated according to the indication information of the network device. For example, the network device may indicate to the first terminal that the network device is in a certain state. Whether the signal sent within the time range is modulated.

In some embodiments, when the signal sent by the network device received by the first terminal is an unmodulated signal, the first terminal may determine any of the multiple modulation modes supported by the first terminal. A modulation method or a specific modulation method is used as the target modulation method used to modulate the third signal.

In some embodiments, the specific modulation method is configured by the network device or is predefined.

In some embodiments, the specific modulation mode is configured by the network device according to the first capability information reported by the first terminal, wherein the first capability information is used to indicate the modulation supported by the first terminal. Way.

In some embodiments, the specific modulation scheme is a modulation scheme not used by the network device.

In summary, in the embodiment of the present application, the first terminal can use the modulated energy supply signal sent by the network device to perform backscattering communication, so that the first terminal does not have to wait to receive an unmodulated signal before performing backscattering. Communication can reduce the limitation of backscatter communication time and reduce communication delay.

The wireless communication method according to one embodiment of the present application is described above with reference to FIGS. 6 to 9 . The wireless communication method according to another embodiment of the present application is described below with reference to FIG. 10 .

Figure 10 is a schematic flowchart of a wireless communication method 300 according to another embodiment of the present application. The method 300 can be executed by the network device in the communication system shown in Figure 1. As shown in Figure 3, the method 300 includes The following content:

S301. The first terminal receives the first signal sent by the network device;

S302: The first terminal determines the target modulation method used to modulate the first signal based on whether the first signal has been modulated;

S303: The first terminal modulates the first signal to obtain a second signal;

S304: The first terminal backscatters the second signal to the network device.

In some embodiments, the first terminal may communicate with the network device through a zero-power communication method.

Optionally, the zero-power communication may include backscatter communication, or may include other passive or semi-passive communication methods, and the application is not limited thereto.

In some embodiments, the first terminal is a zero-power consumption terminal, or other terminal that does not actively transmit signals but uses signals sent by network devices to carry information.

In some embodiments, the power supply mode of the first terminal may be a passive or semi-passive mode.

In some embodiments, the zero-power consumption terminal may be based on the aforementioned RFID technology, or may also be based on other related or technologies introduced in subsequent standard evolutions for zero-power communication or low-power communication. Hereinafter, the terminal The device communicates with the network device through backscatter communication as an example for description, but the application is not limited to this.

It should be understood that the embodiments of the present application can be applied to cellular IoT systems, such as cellular passive IoT systems, or can also be applied to other scenarios where terminal devices send information to network devices through zero-power communication or battery-free communication. The application is not limited to this.

In this embodiment of the present application, the first signal may also be called an energy supply signal or an incoming wave signal, that is, the first signal may be used to supply energy to the first terminal so that the first terminal supplies energy to the network. The device sends backscattered signals to transmit information.

In some embodiments, the first terminal may determine whether the first signal is a modulated signal according to the received first signal. For example, the first terminal may determine whether the first signal is a modulated signal based on at least one of envelope information, frequency information and phase information of the first signal.

As an example, the first terminal may detect envelope information of the first signal and determine whether the first signal is ASK modulated. As another example, the first terminal may detect the frequency information of the first signal and determine whether the first signal is FSK modulated. As another example, the first terminal may detect the phase information of the first signal and determine whether the first signal is PSK modulated.

In other embodiments, the first terminal may also determine whether the first signal is a modulated signal according to the indication information of the network device. For example, the network device may indicate a certain time range to the first terminal. Whether the signal sent within is modulated.

It should be understood that in this embodiment of the present application, when the first signal is a modulated signal, the modulation method used by the first terminal to modulate the first signal needs to meet certain constraints. , or certain constraints need to be met between the modulation mode used by the first terminal to modulate the first signal and the modulation mode used by the network device to obtain the first signal, so that the first The second signal backscattered by the terminal can be correctly demodulated by the network device.

In the following, with reference to Embodiment 1 and Embodiment 2, respectively, in the case where the first signal is a modulated signal and the first signal is an unmodulated signal, the first terminal responds to the third signal. A method of determining the target modulation method used to modulate a signal.

Embodiment 1: The first signal is a modulated signal.

In this case, as Embodiment 1-1, the first terminal may determine the modulation method used by the first terminal to modulate the first signal based on the modulation method used by the network device to obtain the first signal. target modulation method.

In this embodiment of the present application, the first terminal may modulate the first signal using the target modulation method to carry information to be sent by the first terminal to the network device.

It should be understood that the modulation methods in the embodiments of this application include but are not limited to amplitude keying (ASK), frequency shift keying (FSK), phase shift keying (PSK), or may also include other modulations introduced in the evolution of standards. method, this application is not limited to this.

In some embodiments, if the first signal is modulated by the network device using a first modulation method, the first terminal may determine the second modulation method as the modulation method used to modulate the first signal. Target modulation method. That is, the first terminal may use the second modulation method to modulate the first signal to obtain the second signal.

In some embodiments, the second modulation method satisfies the following constraints: the network device demodulates the second signal based on the demodulation method corresponding to the second modulation method to obtain the content carried in the second signal. information.

In some embodiments, the second modulation method is different from the first modulation method. For example, the first modulation mode is a modulation mode that is not used by the first terminal, or a modulation mode that is not supported.

In some embodiments, the first modulation mode and the second modulation mode are associated. The association between the first modulation mode and the second modulation mode may be predefined, or may be configured by a network device. .

In some embodiments, the first terminal determines the target modulation mode according to the modulation mode used by the network device to obtain the first signal and the first association relationship. Wherein, the first association relationship may be an association relationship between a modulation mode used by a network device and a modulation mode used by a terminal device, or an association relationship between a modulation mode used by a network device and a modulation mode used by a zero-power terminal, or, The relationship between the modulation scheme used by network equipment and the modulation scheme used for backscatter communications.

In some embodiments, the first association relationship may be predefined, or may be configured by a network device.

Optionally, in the first association relationship, the modulation mode used by the network device and the modulation mode used by the terminal device may be in one-to-one correspondence, or may be one-to-many, or many-to-one. There are no restrictions on this application. Table 2 is an example of the first association relationship according to the present application.

Table 2

Modulation method used by network equipment Modulation method used by terminal equipment ASK PSK PSK ASK FSK ASK ASK FSK

As an example, the first modulation method is ASK, and the second modulation method is PSK or FSK.

As another example, the first modulation method is PSK, and the second modulation method is ASK.

In some embodiments of the present application, the method 300 further includes:

The first terminal determines the modulation mode used by the network device to obtain the first signal.

Method 1: The first terminal determines the modulation mode used by the network device to obtain the first signal based on the received first signal.

In some embodiments, the first terminal may determine the modulation used by the network device to obtain the first signal based on at least one of envelope information, frequency information and phase information of the received first signal. Way.

For example, the first terminal may detect the envelope information of the first signal and determine whether the first signal is ASK modulated. For another example, the first terminal may detect the frequency information of the first signal and determine whether the first signal is FSK modulated. For another example, the first terminal may detect the phase information of the first signal and determine whether the first signal is PSK modulated.

In other embodiments, the first terminal demodulates the first signal according to demodulation methods corresponding to multiple modulation modes, and demodulates the first signal according to the demodulation modes corresponding to the multiple modulation modes. The demodulation result of the signal determines the modulation method used by the network device to obtain the first signal.

That is, the first terminal can blindly demodulate the first signal to determine the modulation mode corresponding to the first signal.

Method 2: The first terminal determines the modulation mode used by the network device to obtain the first signal according to the first indication information sent by the network device, wherein the first indication information is used to indicate the The modulation method used by network equipment.

In some embodiments, the first indication information is received by the first terminal before receiving the first signal. That is, before sending the first signal, the network device may indicate, through the first indication information, the modulation method used for subsequent signals to be sent.

Optionally, the first indication information may also be used to indicate a time range corresponding to the modulation mode adopted by the network device, that is, the network device adopts the modulation mode within this time range. Then, all signals received by the first terminal within this period of time can be considered to be modulated by the network device using this modulation method.

In some embodiments, the modulation method used by the network device to carry the signal of the first indication information may be a predefined modulation method, or a default modulation method.

In some embodiments, the network device and the first terminal use a predefined modulation method during initial communication. For example, the first indication information may be sent by the network device and the first terminal during initial communication.

In some embodiments, the initial communication may include the first terminal entering the coverage area of the network device and communicating with the network device for the first time, or may also include the first terminal interrupting and the network device After communicating with the device, communicate with the network device again.

Method 3: The first terminal determines that the network device modulates the first signal using a third modulation method, and the third modulation method is a predefined modulation method.

In some embodiments, the first terminal determines that the first signal sent by the network device is modulated using a predefined modulation method during initial communication.

Optionally, the number of the predefined modulation modes may be one, or may be multiple.

In some embodiments, the third modulation method is designed to be: a signal modulated by the third modulation method, and then a signal modulated and backscattered by any modulation method supported by the first terminal, and the network The equipment is capable of demodulating the backscattered signal.

Embodiment 1-2: The first terminal determines the target modulation mode used to modulate the first signal according to the second instruction information of the network device.

In some embodiments, the second indication information is used to indicate the modulation mode adopted by the first terminal and/or the time information of using the modulation mode. Alternatively, the second indication information is used to indicate the modulation mode used by the first terminal to perform backscatter communication and/or the time information of using the modulation mode.

Optionally, the time information of the modulation mode may include the start usage time and/or usage duration information of the modulation mode. That is, the time period during which the first terminal uses the modulation method can be determined based on the time information of the modulation method. For example, the first terminal may use the modulation method indicated by the second indication information to modulate the modulated signal sent by the network device within the time period corresponding to the modulation method.

In some embodiments of the present application, the method 300 further includes:

The first terminal reports first capability information to the network device, where the first capability information is used to indicate a modulation mode supported by the first terminal, or a modulation mode expected to be used by the first terminal.

In some embodiments, the first capability information may be sent by the network device and the first terminal during initial communication.

In some embodiments, the second indication information is determined by the network device based on the first capability information reported by the terminal device.

For example, if the network device supports ASK, PSK and FSK modulation modes, and the first terminal supports ASK and PSK modulation modes, the second indication information may be used to instruct the first terminal to adopt the ASK modulation mode and use the ASK modulation mode. time period, or the first terminal may also be instructed to adopt the PSK modulation method and the time period during which the PSK modulation method is used.

In some embodiments, during the time period corresponding to the modulation mode indicated by the second indication information, the network device does not use this modulation mode to modulate the energy supply signal to avoid the network device from demodulating the backscattered signal. affect. That is to say, the modulation method used by the network device based on the instruction of the first terminal and the modulation method used by the network device in the same time period do not affect the demodulation of the backscattered signal by the network device.

In some embodiments, the second indication information may be sent by the network device and the first terminal during initial communication.

Embodiment 1-3: The first terminal determines a fourth modulation method as the target modulation method used to modulate the first signal, and the fourth modulation method is a predefined modulation method.

In some embodiments, the first signal is modulated by the network device using a third modulation method, and the third modulation method is a predefined modulation method.

In some embodiments, the third modulation mode and the fourth modulation mode have an associated relationship, for example, at least one of the associated relationships in Table 1 is satisfied.

In some embodiments, the third modulation method and the fourth modulation method are designed such that the network device modulates the first modulation method using the third modulation method based on the demodulation method corresponding to the fourth modulation method. The signal is further modulated using the fourth modulation method and the second signal obtained is demodulated, so that the information carried in the second signal can be obtained.

Embodiment 2: The first signal is an unmodulated signal

In some embodiments, when the signal sent by the network device received by the first terminal is an unmodulated signal, the first terminal may determine any of the multiple modulation modes supported by the first terminal. A modulation method or a specific modulation method is used as the target modulation method used to modulate the first signal.

In some embodiments, the specific modulation method is configured by the network device or is predefined.

In some embodiments, the specific modulation mode is configured by the network device according to the first capability information reported by the first terminal, wherein the first capability information is used to indicate the modulation supported by the first terminal. Way.

In some embodiments, the specific modulation scheme is a modulation scheme not used by the network device.

In summary, in the embodiment of the present application, the first terminal can use the network device to send any signal for backscattering communication, and the first terminal can determine the modulation used for backscattering based on whether the signal sent by the network device has been modulated. This method is conducive to avoiding the first terminal's modulation of the energy supply signal sent by the network device, which affects the network device's demodulation of the backscattered signal, hiding it, and the first terminal does not have to wait to receive the unmodulated signal before performing reverse operation. Scattering communication can reduce the time limit of backscattering communication and reduce communication delay.

The method embodiments of the present application are described in detail above with reference to Figures 6 to 10. The device embodiments of the present application are described in detail below with reference to Figures 11 to 14. It should be understood that the device embodiments and the method embodiments correspond to each other, and are similar to The description may refer to the method embodiments.

Figure 11 shows a schematic block diagram of a terminal device 400 according to an embodiment of the present application. As shown in Figure 11, the terminal device 400 includes:

The communication unit 410 is configured to receive the first signal sent by the network device, where the first signal is a modulated signal;

The processing unit 420 is used to modulate the first signal to obtain a second signal;

The communication ticket number 410 is also used to send the second signal to the network device.

In some embodiments, the processing unit 420 is also used to:

Determine a target modulation method used to modulate the first signal.

In some embodiments, the processing unit 420 is also used to:

According to the modulation mode used by the network device to obtain the first signal, a target modulation mode used to modulate the first signal is determined.

In some embodiments, the processing unit 420 is also used to:

If the first signal is modulated by the network device using a first modulation method, determine the second modulation method as the target modulation method used to modulate the first signal, wherein the first modulation method has a correlation relationship with the second modulation method.

In some embodiments, the association relationship is predefined or configured by the network device.

In some embodiments, the processing unit 420 is also used to:

Determine the modulation mode used by the network device to obtain the first signal.

In some embodiments, the processing unit 420 is also used to:

According to the received first signal, the modulation mode used by the network device to obtain the first signal is determined.

In some embodiments, the processing unit 420 is also used to:

The modulation mode used by the network device to obtain the first signal is determined according to the first indication information sent by the network device, where the first indication information is used to indicate the modulation mode used by the network device.

In some embodiments, the first indication information is received by the terminal device before receiving the first signal.

In some embodiments, the processing unit 420 is also used to:

It is determined that the network device uses a third modulation method to obtain the first signal, and the third modulation method is a predefined modulation method.

In some embodiments, the processing unit 420 is also used to:

Determine the target modulation mode used to modulate the first signal according to the second indication information of the network device, wherein the second indication information is used to indicate the mode used by the terminal device to perform backscatter communication. Modulation method and/or time information using said modulation method.

In some embodiments, the communication unit 410 is also used to:

Report first capability information to the network device, where the first capability information is used to indicate a modulation mode supported by the terminal device.

In some embodiments, the second indication information is determined by the network device based on the first capability information reported by the terminal device.

In some embodiments, the processing unit 420 is also used to:

The fourth modulation mode is determined as the target modulation mode used to modulate the first signal, wherein the fourth modulation mode is a predefined modulation mode.

In some embodiments, the first signal is modulated by the network device using a third modulation method, wherein the third modulation method is a predefined modulation method, and the third modulation method and the third modulation method are The four modulation modes are related.

In some embodiments, the communication unit 410 is also used to:

Receive a third signal sent by the network device, where the third signal is an unmodulated signal;

The processing unit 420 is also used to:

Determine the target modulation method used to modulate the third signal;

The third signal is modulated to obtain a fourth signal, and the fourth signal is backscattered toward the network device.

In some embodiments, the processing unit 420 is also used to:

Among the multiple modulation modes supported by the terminal device, any modulation mode or a specific modulation mode is determined as the target modulation mode used to modulate the third signal.

In some embodiments, the specific modulation method is configured by the network device or is predefined.

In some embodiments, the specific modulation mode is configured by the network device according to the first capability information reported by the terminal device, where the first capability information is used to indicate the modulation mode supported by the terminal device.

In some embodiments, the terminal device is a zero-power consumption terminal.

In some embodiments, the communication unit 410 is also used to:

The second signal is sent by backscattering.

Optionally, in some embodiments, the above-mentioned communication unit may be a communication interface or transceiver, or an input/output interface of a communication chip or a system on a chip. The above-mentioned processing unit may be one or more processors.

It should be understood that the terminal device 400 according to the embodiment of the present application may correspond to the first terminal in the method embodiment of the present application, and the above and other operations and/or functions of the various units in the terminal device 400 are respectively to implement FIG. 6 to FIG. The corresponding process of the first terminal in the method 200 shown in 9 is not repeated here for the sake of simplicity.

Figure 12 shows a schematic block diagram of a terminal device 800 according to an embodiment of the present application. As shown in Figure 12, the terminal device 800 includes:

Communication unit 810, used to receive the first signal sent by the network device;

The processing unit 820 is configured to determine the target modulation method used to modulate the first signal according to whether the first signal has been modulated, and modulate the first signal to obtain a second signal;

The communication unit 810 is also configured to backscatter the second signal to the network device.

In some embodiments, the processing unit 820 is also used to:

In the case where the first signal is an unmodulated signal, any modulation mode or a specific modulation mode is determined as the target modulation mode among multiple modulation modes supported by the first terminal.

In some embodiments, the specific modulation method is configured by the network device or is predefined.

In some embodiments, the communication unit 810 is also used to:

Report first capability information to the network device, where the first capability information is used to indicate a modulation mode supported by the first terminal.

In some embodiments, the specific modulation mode is configured by the network device according to the first capability information reported by the first terminal.

In some embodiments, the processing unit 820 is also used to:

When the first signal is a modulated signal, the target modulation method used to modulate the first signal is determined according to the modulation method used by the network device to obtain the first signal.

In some embodiments, the processing unit 820 is also used to:

If the first signal is modulated by the network device using a first modulation method, determine the second modulation method as the target modulation method used to modulate the first signal, wherein the first modulation method has a correlation relationship with the second modulation method.

In some embodiments, the association relationship is predefined or configured by the network device.

In some embodiments, the processing unit 820 is also used to:

In the case where the first signal is a modulated signal, the target modulation method used to modulate the first signal is determined according to the second indication information of the network device, wherein the second indication The information is used to indicate the modulation mode used by the first terminal to perform backscatter communication and/or the time information of using the modulation mode.

In some embodiments, the processing unit 820 is also used to:

The fourth modulation mode is determined as the target modulation mode used to modulate the first signal, wherein the fourth modulation mode is a predefined modulation mode.

In some embodiments, the first signal is modulated by the network device using a third modulation method, wherein the third modulation method is a predefined modulation method, and the third modulation method and the third modulation method are The four modulation modes are related.

Optionally, in some embodiments, the above-mentioned communication unit may be a communication interface or transceiver, or an input/output interface of a communication chip or a system on a chip. The above-mentioned processing unit may be one or more processors.

It should be understood that the terminal device 800 according to the embodiment of the present application may correspond to the first terminal in the method embodiment of the present application, and the above and other operations and/or functions of each unit in the terminal device 800 are respectively intended to implement what is shown in Figure 10 The corresponding process of the first terminal in method 300 will not be described again for the sake of simplicity.

Figure 13 is a schematic block diagram of a network device according to an embodiment of the present application. The network device 500 of Figure 13 includes:

The communication unit 510 is configured to send a first signal to a first terminal, where the first signal is a modulated signal; and receive a second signal sent by the first terminal, where the second signal is the first signal. The terminal modulates the first signal.

In some embodiments, the communication unit 510 is also used to:

The network device sends first indication information to the first terminal, where the first indication information is used to indicate the modulation mode used in the signal sent by the network device.

In some embodiments, the first indication information is sent before the network device sends the first signal.

In some embodiments, the communication unit 510 is also used to:

The network device sends second indication information to the first terminal, where the second indication information is used to indicate the modulation mode used by the first terminal for backscatter communication and/or the time for using the modulation mode. information.

In some embodiments, the communication unit 510 is also used to:

Receive first capability information reported by the first terminal, where the first capability information is used to indicate a modulation method supported by the first terminal;

The network equipment also includes:

A processing unit configured to determine the second indication information according to the first capability information.

In some embodiments, the first signal is modulated by the network device using a first modulation method, and the first modulation method is a predefined modulation method.

In some embodiments, the second signal is modulated by the first terminal using a second modulation method, the second modulation method is a predefined modulation method, and the first modulation method and the second modulation method are Modulation methods are related.

Optionally, in some embodiments, the above-mentioned communication unit may be a communication interface or transceiver, or an input/output interface of a communication chip or a system on a chip. The above-mentioned processing unit may be one or more processors.

It should be understood that the network device 500 according to the embodiment of the present application may correspond to the network device in the method embodiment of the present application, and the above and other operations and/or functions of each unit in the network device 500 are respectively to implement Figures 6 to 10 The corresponding process of the network device in the method shown is not repeated here for the sake of simplicity.

Figure 14 is a schematic structural diagram of a communication device 600 provided by an embodiment of the present application. The communication device 600 shown in Figure 14 includes a processor 610. The processor 610 can call and run a computer program from the memory to implement the method in the embodiment of the present application.

Optionally, as shown in Figure 14, the communication device 600 may further include a memory 620. The processor 610 can call and run the computer program from the memory 620 to implement the method in the embodiment of the present application.

The memory 620 may be a separate device independent of the processor 610 , or may be integrated into the processor 610 .

Optionally, as shown in Figure 14, the communication device 600 may also include a transceiver 630, and the processor 610 may control the transceiver 630 to communicate with other devices. Specifically, it may send information or data to other devices, or receive other devices. Information or data sent by the device.

Among them, the transceiver 630 may include a transmitter and a receiver. The transceiver 630 may further include an antenna, and the number of antennas may be one or more.

Optionally, the communication device 600 may specifically be a network device according to the embodiment of the present application, and the communication device 600 may implement the corresponding processes implemented by the network device in the various methods of the embodiment of the present application. For the sake of brevity, details will not be repeated here. .

Optionally, the communication device 600 may be a mobile terminal/terminal device according to the embodiment of the present application, such as a first terminal, and the communication device 600 may implement the methods implemented by the mobile terminal/terminal device in the embodiments of the present application. The corresponding process will not be repeated here for the sake of brevity.

Figure 15 is a schematic structural diagram of a chip according to an embodiment of the present application. The chip 700 shown in Figure 15 includes a processor 710. The processor 710 can call and run a computer program from the memory to implement the method in the embodiment of the present application.

Optionally, as shown in FIG. 15 , the chip 700 may also include a memory 720 . The processor 710 can call and run the computer program from the memory 720 to implement the method in the embodiment of the present application.

The memory 720 may be a separate device independent of the processor 710 , or may be integrated into the processor 710 .

Optionally, the chip 700 may also include an input interface 730. The processor 710 can control the input interface 730 to communicate with other devices or chips. Specifically, it can obtain information or data sent by other devices or chips.

Optionally, the chip 700 may also include an output interface 740. The processor 710 can control the output interface 740 to communicate with other devices or chips. Specifically, it can output information or data to other devices or chips.

Optionally, the chip can be applied to the network device in the embodiment of the present application, and the chip can implement the corresponding processes implemented by the network device in the various methods of the embodiment of the present application. For the sake of brevity, the details will not be described again.

Optionally, the chip can be applied to the mobile terminal/terminal device in the embodiment of the present application, such as the first terminal, and the chip can implement the corresponding processes implemented by the mobile terminal/terminal device in the various methods of the embodiment of the present application, For the sake of brevity, no further details will be given here.

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

Figure 16 is a schematic block diagram of a communication system 900 provided by an embodiment of the present application. As shown in FIG. 16 , the communication system 900 includes a terminal device 910 and a network device 920 .

Among them, the terminal device 910 can be used to implement the corresponding functions implemented by the first terminal in the above method, and the network device 920 can be used to implement the corresponding functions implemented by the network device in the above method. For the sake of brevity, no more details are provided here. Repeat.

It should be understood that the processor in the embodiment of the present application may be an integrated circuit chip and has signal processing capabilities. During the implementation process, each step of the above method embodiment can be completed through an integrated logic circuit of hardware in the processor or instructions in the form of software. The above-mentioned processor can be a general-purpose processor, a digital signal processor (Digital Signal Processor, DSP), an application specific integrated circuit (Application Specific Integrated Circuit, ASIC), an off-the-shelf programmable gate array (Field Programmable Gate Array, FPGA) or other available processors. Programmed logic devices, discrete gate or transistor logic devices, discrete hardware components. Each method, step and logical block diagram disclosed in the embodiment of this application can be implemented or executed. A general-purpose processor may be a microprocessor or the processor may be any conventional processor, etc. The steps of the methods disclosed in conjunction with the embodiments of the present application can be directly implemented by a hardware decoding processor, or executed by a combination of hardware and software modules in the decoding processor. The software module can be located in random access memory, flash memory, read-only memory, programmable read-only memory or electrically erasable programmable memory, registers and other mature storage media in this field. The storage medium is located in the memory, and the processor reads the information in the memory and completes the steps of the above method in combination with its hardware.

It can be understood that the memory in the embodiment of the present application may be a volatile memory or a non-volatile memory, or may include both volatile and non-volatile memories. Among them, the non-volatile memory can be read-only memory (Read-Only Memory, ROM), programmable read-only memory (Programmable ROM, PROM), erasable programmable read-only memory (Erasable PROM, EPROM), electrically removable memory. Erase programmable read-only memory (Electrically EPROM, EEPROM) or flash memory. The volatile memory may be random access memory (RAM), which is used as an external cache. By way of illustration, but not limitation, many forms of RAM are available, such as static random access memory (SRAM), dynamic random access memory (Dynamic RAM, DRAM), synchronous dynamic random access memory (Synchronous DRAM, SDRAM), double data rate synchronous dynamic random access memory (Double Data Rate SDRAM, DDR SDRAM), enhanced synchronous dynamic random access memory (Enhanced SDRAM, ESDRAM), synchronous link dynamic random access memory (Synchlink DRAM, SLDRAM) ) and direct memory bus random access memory (Direct Rambus RAM, DR RAM). It should be noted that the memory of the systems and methods described herein is intended to include, but is not limited to, these and any other suitable types of memory.

It should be understood that the above memory is illustrative but not restrictive. For example, the memory in the embodiment of the present application can also be static random access memory (static RAM, SRAM), dynamic random access memory (dynamic RAM, DRAM), Synchronous dynamic random access memory (synchronous DRAM, SDRAM), double data rate synchronous dynamic random access memory (double data rate SDRAM, DDR SDRAM), enhanced synchronous dynamic random access memory (enhanced SDRAM, ESDRAM), synchronous connection Dynamic random access memory (synch link DRAM, SLDRAM) and direct memory bus random access memory (Direct Rambus RAM, DR RAM) and so on. That is, memories in embodiments of the present application are intended to include, but are not limited to, these and any other suitable types of memories.

Embodiments of the present application also provide a computer-readable storage medium for storing computer programs.

Optionally, the computer-readable storage medium can be applied to the network device in the embodiment of the present application, and the computer program causes the computer to execute the corresponding processes implemented by the network device in the various methods of the embodiment of the present application. For the sake of simplicity, here No longer.

Optionally, the computer-readable storage medium can be applied to the mobile terminal/terminal device in the embodiment of the present application, and the computer program causes the computer to execute the corresponding processes implemented by the mobile terminal/terminal device in the various methods of the embodiment of the present application. , for the sake of brevity, will not be repeated here.

An embodiment of the present application also provides a computer program product, including computer program instructions.

Optionally, the computer program product can be applied to the network device in the embodiment of the present application, and the computer program instructions cause the computer to execute the corresponding processes implemented by the network device in the various methods of the embodiment of the present application. For the sake of brevity, they are not included here. Again.

Optionally, the computer program product can be applied to the mobile terminal/terminal device in the embodiment of the present application, such as the first terminal, and the computer program instructions cause the computer to perform the various methods in the embodiment of the present application by the mobile terminal/terminal device. The corresponding process of implementation will not be repeated here for the sake of brevity.

An embodiment of the present application also provides a computer program.

Optionally, the computer program can be applied to the network device in the embodiment of the present application. When the computer program is run on the computer, it causes the computer to execute the corresponding processes implemented by the network device in each method of the embodiment of the present application. For the sake of simplicity , which will not be described in detail here.

Optionally, the computer program can be applied to the mobile terminal/terminal device in the embodiment of the present application, such as the first terminal. When the computer program is run on the computer, it causes the computer to execute the various methods in the embodiment of the present application by the mobile terminal. The corresponding process for terminal/terminal equipment implementation will not be described here for the sake of simplicity.

Those of ordinary skill in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented with electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Skilled artisans may implement the described functionality using different methods for each specific application, but such implementations should not be considered beyond the scope of this application.

Those skilled in the art can clearly understand that for the convenience and simplicity of description, the specific working processes of the systems, devices and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be described again here.

In the several embodiments provided in this application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the device embodiments described above are only illustrative. For example, the division of the units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components may be combined or can be integrated into another system, or some features can be ignored, or not implemented. On the other hand, the coupling or direct coupling or communication connection between each other shown or discussed may be through some interfaces, and the indirect coupling or communication connection of the devices or units may be in electrical, mechanical or other forms.

The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place, or they may be distributed to multiple network units. Some or all of the units can be selected according to actual needs to achieve the purpose of this embodiment.

In addition, each functional unit in each embodiment of the present application can be integrated into one processing unit, each unit can exist physically alone, or two or more units can be integrated into one unit.

If the functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application is essentially or the part that contributes to the existing technology or the part of the technical solution can be embodied in the form of a software product. The computer software product is stored in a storage medium, including Several instructions are used to cause a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in various embodiments of this application. The aforementioned storage media include: U disk, mobile hard disk, read-only memory (ROM), random access memory (RAM), magnetic disk or optical disk and other media that can store program code. .

The above are only specific embodiments of the present application, but the protection scope of the present application is not limited thereto. Any person familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present application. should be covered by the protection scope of this application. Therefore, the protection scope of this application should be determined by the protection scope of the claims.

Claims (90)

A method of wireless communication, characterized in that the method includes: The first terminal receives the first signal sent by the network device, where the first signal is a modulated signal; The first terminal modulates the first signal to obtain a second signal; The first terminal sends the second signal to the network device. The method of claim 1, further comprising: The first terminal determines a target modulation mode used to modulate the first signal. The method according to claim 2, wherein the first terminal determines a target modulation method used to modulate the first signal, including: The first terminal determines a target modulation mode used to modulate the first signal according to the modulation mode used by the network device to obtain the first signal. The method of claim 3, wherein the first terminal determines the target modulation method used to modulate the first signal based on the modulation method used by the network device to obtain the first signal. ,include: If the first signal is modulated by the network device using a first modulation method, determine the second modulation method as the target modulation method used to modulate the first signal, wherein the first modulation method has a correlation relationship with the second modulation method. The method of claim 4, wherein the association relationship is predefined or configured by the network device. The method according to any one of claims 3-5, characterized in that the method further includes: The first terminal determines the modulation mode used by the network device to obtain the first signal. The method of claim 6, wherein the first terminal determines the modulation method used by the network device to obtain the first signal, including: The first terminal determines the modulation mode used by the network device to obtain the first signal based on the received first signal. The method of claim 6, wherein the first terminal determines the modulation method used by the network device to obtain the first signal, including: The first terminal determines the modulation mode used by the network device to obtain the first signal according to the first indication information sent by the network device, wherein the first indication information is used to indicate the modulation mode used by the network device. The modulation method used. The method of claim 8, wherein the first indication information is received by the first terminal before receiving the first signal. The method of claim 6, wherein the first terminal determines the modulation method used by the network device to obtain the first signal, including: The first terminal determines that the network device uses a third modulation method to obtain the first signal, and the third modulation method is a predefined modulation method. The method according to claim 2, wherein the first terminal determines a target modulation method used to modulate the first signal, including: The first terminal determines the target modulation mode used to modulate the first signal according to the second instruction information of the network device, wherein the second instruction information is used to instruct the first terminal to perform reverse operation. The modulation scheme used for scatter communication and/or the time information using the modulation scheme. The method according to claim 11, characterized in that, the method further includes: The first terminal reports first capability information to the network device, where the first capability information is used to indicate a modulation mode supported by the first terminal. The method according to claim 12, wherein the second indication information is determined by the network device based on the first capability information reported by the terminal device. The method according to claim 2, wherein the first terminal determines a target modulation method used to modulate the first signal, including: The first terminal determines a fourth modulation mode as a target modulation mode used to modulate the first signal, wherein the fourth modulation mode is a predefined modulation mode. The method of claim 14, wherein the first signal is modulated by the network device using a third modulation method, wherein the third modulation method is a predefined modulation method, and the third modulation method is a predefined modulation method. The three modulation modes have a correlation relationship with the fourth modulation mode. The method according to any one of claims 1-15, characterized in that the method includes: The first terminal receives a third signal sent by the network device, where the third signal is an unmodulated signal; The first terminal determines a target modulation method used to modulate the third signal; The first terminal modulates the third signal to obtain a fourth signal, and backscatters the fourth signal to the network device. The method of claim 16, wherein the first terminal determines a target modulation method used to modulate the third signal, including: Among the multiple modulation modes supported by the first terminal, any modulation mode or a specific modulation mode is determined as the target modulation mode used to modulate the third signal. The method according to claim 17, characterized in that the specific modulation mode is configured by the network device or is predefined. The method according to claim 17 or 18, characterized in that the specific modulation mode is configured by the network device according to the first capability information reported by the first terminal, wherein the first capability information is used for Indicates the modulation mode supported by the first terminal. The method according to any one of claims 1-19, characterized in that the first terminal is a zero-power consumption terminal. The method according to any one of claims 1-20, characterized in that the first terminal sending the second signal to the network device includes: the first terminal sending the second signal through backscattering. Describe the second signal. A method of wireless communication, characterized in that the method includes: The first terminal receives the first signal sent by the network device; The first terminal determines a target modulation method used to modulate the first signal according to whether the first signal has been modulated; The first terminal modulates the first signal to obtain a second signal; The first terminal backscatters the second signal to the network device. The method according to claim 22, characterized in that the first terminal determines the target modulation method used to modulate the first signal according to whether the first signal has been modulated, including: When the first signal is an unmodulated signal, the first terminal determines any modulation method or a specific modulation method as the target modulation method among multiple modulation methods supported by the first terminal. . The method according to claim 23, characterized in that the specific modulation mode is configured by a network device or is predefined. The method of claim 24, further comprising: The first terminal reports first capability information to the network device, where the first capability information is used to indicate a modulation mode supported by the first terminal. The method according to claim 25, characterized in that the specific modulation mode is configured by the network device according to the first capability information reported by the first terminal. The method according to claim 22, characterized in that the first terminal determines the target modulation method used to modulate the first signal according to whether the first signal has been modulated, including: When the first signal is a modulated signal, the first terminal determines the modulation method used to modulate the first signal according to the modulation method used by the network device to obtain the first signal. Target modulation method. The method according to claim 27, characterized in that the first terminal determines the target modulation method used to modulate the first signal according to the modulation method used by the network device to obtain the first signal. ,include: If the first signal is modulated by the network device using a first modulation method, determine the second modulation method as the target modulation method used to modulate the first signal, wherein the first modulation method has a correlation relationship with the second modulation method. The method according to claim 28, characterized in that the association relationship is predefined or configured by the network device. The method according to claim 22, characterized in that the first terminal determines the target modulation method used to modulate the first signal according to whether the first signal has been modulated, including: In the case where the first signal is a modulated signal, the first terminal determines the target modulation method used to modulate the first signal according to the second instruction information of the network device, wherein, The second indication information is used to indicate the modulation mode adopted by the first terminal for backscatter communication and/or the time information of using the modulation mode. The method according to claim 30, wherein the first terminal determines the target modulation method used to modulate the first signal according to whether the first signal has been modulated, including: The first terminal determines a fourth modulation mode as a target modulation mode used to modulate the first signal, wherein the fourth modulation mode is a predefined modulation mode. The method of claim 31, wherein the first signal is modulated by the network device using a third modulation method, wherein the third modulation method is a predefined modulation method, and the third modulation method is a predefined modulation method. The three modulation modes have a correlation relationship with the fourth modulation mode. A method of wireless communication, characterized in that the method includes: The network device sends a first signal to the first terminal, where the first signal is a modulated signal; The network device receives a second signal sent by the first terminal, where the second signal is obtained by modulating the first signal by the first terminal. The method of claim 33, further comprising: The network device sends first indication information to the first terminal, where the first indication information is used to indicate the modulation mode used in the signal sent by the network device. The method of claim 34, wherein the first indication information is sent before the network device sends the first signal. The method according to any one of claims 33-35, characterized in that the method further includes: The network device sends second indication information to the first terminal, where the second indication information is used to indicate the modulation mode used by the first terminal for backscatter communication and/or the time for using the modulation mode. information. The method of claim 36, further comprising: The network device receives first capability information reported by the first terminal, where the first capability information is used to indicate a modulation mode supported by the first terminal; The network device determines the second indication information according to the first capability information. The method according to claim 33, characterized in that the first signal is modulated by the network device using a first modulation method, and the first modulation method is a predefined modulation method. The method according to claim 38, characterized in that the second signal is modulated by the first terminal using a second modulation method, the second modulation method is a predefined modulation method, and the first The modulation mode and the second modulation mode have a correlation relationship. The method according to claim 39, characterized in that the association relationship is predefined or configured by a network device. A terminal device, characterized by including: A communication unit, configured to receive a first signal sent by a network device, where the first signal is a modulated signal; A processing unit configured to modulate the first signal to obtain a second signal; and Send the second signal to the network device. The terminal device according to claim 41, characterized in that the processing unit is also used to: Determine a target modulation method used to modulate the first signal. The terminal device according to claim 42, characterized in that the processing unit is also used to: According to the modulation mode used by the network device to obtain the first signal, a target modulation mode used to modulate the first signal is determined. The terminal device according to claim 43, characterized in that the processing unit is also used to: If the first signal is modulated by the network device using a first modulation method, determine the second modulation method as the target modulation method used to modulate the first signal, wherein the first modulation method has a correlation relationship with the second modulation method. The terminal device according to claim 44, wherein the association relationship is predefined or configured by the network device. The terminal device according to any one of claims 43-45, wherein the processing unit is further configured to determine the modulation method used by the network device to obtain the first signal. The terminal device according to claim 46, characterized in that the processing unit is also used to: According to the received first signal, the modulation mode used by the network device to obtain the first signal is determined. The terminal device according to claim 46, characterized in that the processing unit is also used to: The modulation mode used by the network device to obtain the first signal is determined according to the first indication information sent by the network device, where the first indication information is used to indicate the modulation mode used by the network device. The terminal device according to claim 48, wherein the first indication information is received by the terminal device before receiving the first signal. The terminal device according to claim 46, characterized in that the processing unit is further configured to: determine that the network device obtains the first signal using a third modulation method, and the third modulation method is a predefined modulation method. The terminal device according to claim 42, characterized in that the processing unit is also used to: Determine the target modulation mode used to modulate the first signal according to the second indication information of the network device, wherein the second indication information is used to indicate the mode used by the terminal device to perform backscatter communication. Modulation method and/or time information using said modulation method. The terminal device according to claim 51, characterized in that the communication unit is also used for: Report first capability information to the network device, where the first capability information is used to indicate a modulation mode supported by the terminal device. The terminal device according to claim 52, wherein the second indication information is determined by the network device based on the first capability information reported by the terminal device. The terminal device according to claim 42, characterized in that the processing unit is also used to: The fourth modulation mode is determined as the target modulation mode used to modulate the first signal, wherein the fourth modulation mode is a predefined modulation mode. The terminal device according to claim 54, wherein the first signal is modulated by the network device using a third modulation method, wherein the third modulation method is a predefined modulation method, and the The third modulation method and the fourth modulation method have a correlation relationship. The terminal device according to any one of claims 41-55, characterized in that the communication unit is further configured to: receive a third signal sent by the network device, the third signal being an unmodulated Signal; The processing unit is further configured to: determine a target modulation method used to modulate the third signal, and modulate the third signal to obtain a fourth signal; The communication unit is further configured to backscatter the fourth signal to the network device. The terminal device according to claim 56, characterized in that the processing unit is also used to: Among the multiple modulation modes supported by the terminal device, any modulation mode or a specific modulation mode is determined as the target modulation mode used to modulate the third signal. The terminal device according to claim 57, wherein the specific modulation mode is configured by the network device or is predefined. The terminal device according to claim 57 or 58, characterized in that the specific modulation mode is configured by the network device according to the first capability information reported by the terminal device, wherein the first capability information is used for Indicates the modulation method supported by the terminal device. The terminal device according to any one of claims 41-59, characterized in that the terminal device is a zero-power consumption terminal. The terminal device according to any one of claims 41-60, characterized in that the processing unit is also used to: The second signal is sent by backscattering. A terminal device, characterized by including: A communication unit, configured to receive the first signal sent by the network device; A processing unit configured to determine the target modulation method used to modulate the first signal according to whether the first signal has been modulated, and to modulate the first signal to obtain a second signal; The communication unit is also configured to backscatter the second signal to the network device. The terminal device according to claim 62, characterized in that the processing unit is also used to: In the case where the first signal is an unmodulated signal, any modulation mode or a specific modulation mode is determined as the target modulation mode among multiple modulation modes supported by the terminal device. The terminal device according to claim 63, characterized in that the specific modulation mode is configured by a network device or is predefined. The terminal device according to claim 64, characterized in that the communication unit is also used for: Report first capability information to the network device, where the first capability information is used to indicate a modulation mode supported by the terminal device. The terminal device according to claim 65, wherein the specific modulation mode is configured by the network device according to the first capability information reported by the terminal device. The terminal device according to claim 62, characterized in that the processing unit is also used to: When the first signal is a modulated signal, the target modulation method used to modulate the first signal is determined according to the modulation method used by the network device to obtain the first signal. The terminal device according to claim 67, characterized in that the processing unit is also used to: If the first signal is modulated by the network device using a first modulation method, determine the second modulation method as the target modulation method used to modulate the first signal, wherein the first modulation method has a correlation relationship with the second modulation method. The terminal device according to claim 68, wherein the association relationship is predefined or configured by the network device. The terminal device according to claim 62, characterized in that the processing unit is also used to: In the case where the first signal is a modulated signal, the target modulation method used to modulate the first signal is determined according to the second indication information of the network device, wherein the second indication The information is used to indicate the modulation mode used by the terminal device for backscatter communication and/or the time information of using the modulation mode. The terminal device according to claim 70, characterized in that the processing unit is also used to: The fourth modulation mode is determined as the target modulation mode used to modulate the first signal, wherein the fourth modulation mode is a predefined modulation mode. The terminal device according to claim 71, wherein the first signal is modulated by the network device using a third modulation method, wherein the third modulation method is a predefined modulation method, and the The third modulation method and the fourth modulation method have a correlation relationship. A network device, characterized by including: a communication unit, configured to send a first signal to a first terminal, where the first signal is a modulated signal; and receive a second signal sent by the first terminal, where the second signal is a modulated signal obtained by modulating the first signal. The network device according to claim 73, characterized in that the communication unit is also used for: Send first indication information to the first terminal, where the first indication information is used to indicate the modulation mode used for signals sent by the network device. The network device according to claim 74, wherein the first indication information is sent before the network device sends the first signal. The network device according to any one of claims 73-75, characterized in that the communication unit is also used for: Send second indication information to the first terminal, where the second indication information is used to indicate the modulation mode used by the first terminal for backscatter communication and/or time information for using the modulation mode. The network device according to claim 76, characterized in that the communication unit is also used for: Receive first capability information reported by the first terminal, where the first capability information is used to indicate a modulation mode supported by the first terminal; The network device further includes: a processing unit configured to determine the second indication information according to the first capability information. The network device according to claim 73, wherein the first signal is modulated by the network device using a first modulation method, and the first modulation method is a predefined modulation method. The network device according to claim 78, wherein the second signal is modulated by the first terminal using a second modulation method, the second modulation method is a predefined modulation method, and the second signal is modulated by the first terminal using a second modulation method. A modulation method has an associated relationship with the second modulation method. The network device according to claim 79, wherein the association relationship is predefined or configured by the network device. A terminal device, characterized in that it includes: a processor and a memory, the memory is used to store a computer program, the processor is used to call and run the computer program stored in the memory, and execute any of claims 1 to 21 The method according to one of the preceding claims, or the method according to any one of claims 22 to 32. A chip, characterized in that it includes: a processor for calling and running a computer program from a memory, so that a device equipped with the chip executes the method according to any one of claims 1 to 21, or as The method of any one of claims 22 to 32. A computer-readable storage medium, characterized in that it is used to store a computer program, the computer program causing the computer to perform the method as described in any one of claims 1 to 21, or as any one of claims 22 to 32 method described in the item. A computer program product, characterized by comprising computer program instructions, the computer program instructions causing the computer to perform the method as described in any one of claims 1 to 21, or as described in any one of claims 22 to 32 Methods. A computer program, characterized in that the computer program causes the computer to perform the method according to any one of claims 1 to 21, or the method according to any one of claims 22 to 32. A network device, characterized in that it includes: a processor and a memory, the memory is used to store a computer program, the processor is used to call and run the computer program stored in the memory, and execute any of claims 33 to 40. The method described in one item. A chip, characterized in that it includes: a processor, configured to call and run a computer program from a memory, so that a device equipped with the chip executes the method according to any one of claims 33 to 40. A computer-readable storage medium, characterized in that it is used to store a computer program, the computer program causing the computer to execute the method according to any one of claims 33 to 40. A computer program product, characterized by comprising computer program instructions, the computer program instructions causing a computer to execute the method according to any one of claims 33 to 40. A computer program, characterized in that the computer program causes a computer to perform the method according to any one of claims 33 to 40.