WO2023000231A1

WO2023000231A1 - Wireless communication method, terminal device, and network device

Info

Publication number: WO2023000231A1
Application number: PCT/CN2021/107709
Authority: WO
Inventors: 崔胜江; 徐伟杰; 贺传峰; 左志松; 胡荣贻; 邵帅; 张治�
Original assignee: Oppo广东移动通信有限公司
Priority date: 2021-07-21
Filing date: 2021-07-21
Publication date: 2023-01-26
Also published as: CN117204115A

Abstract

Embodiments of the present application provide a wireless communication method, a terminal device, and a network device. The method comprises: determining a data transmission rate of a terminal device for backscatter communication; and sending backscatter signals on the basis of the data transmission rate. In the present application, the introduction of the data transmission rate for the terminal device for backscatter communication can not only enable application of zero-power consumption terminals to the cellular Internet of Things, but also increase the types and number of link terminals in the network, thereby truly realizing the interconnection of all things and improving data transmission performance.

Description

Wireless communication method, terminal device and network device

technical field

The embodiments of the present application relate to the communication field, and more specifically, to a wireless communication method, a terminal device, and a network device.

Background technique

With the increase of application demand in the fifth-generation mobile communication technology (5-Generation, 5G) industry, there are more and more types of connected objects and application scenarios, and there will be higher requirements for the price and power consumption of communication terminals. The application of batteries and low-cost passive IoT devices has become the key technology of cellular IoT, which can enrich the types and quantities of terminals in the network, and then truly realize the Internet of Everything. Among them, passive IoT devices can be based on radio frequency identification (Radio Frequency Identification, RFID) zero-power consumption terminals, and extended on this basis to be suitable for cellular IoT.

Therefore, how to apply the zero-power consumption terminal to the cellular Internet of Things is a technical problem that needs to be solved urgently in this field.

Contents of the invention

The embodiment of the present application provides a wireless communication method, terminal equipment, and network equipment, which can not only apply zero-power consumption terminals to the cellular Internet of Things, so as to enrich the types and numbers of link terminals in the network, but also truly realize the Internet of Everything. It can also improve data transmission performance.

In a first aspect, the present application provides a wireless communication method, including:

Determine the data transfer rate used by the end device for backscatter communications;

A backscatter signal is sent based on the data transmission rate.

In a second aspect, the present application provides a wireless communication method, including:

A backscatter signal is received based on the data transmission rate.

In a third aspect, the present application provides a terminal device configured to execute the method in the foregoing first aspect or various implementation manners thereof. Specifically, the terminal device includes a functional module configured to execute the method in the foregoing first aspect or its various implementation manners.

In an implementation manner, the terminal device may include a processing unit configured to perform functions related to information processing. For example, the processing unit may be a processor.

In an implementation manner, the terminal device may include a sending unit and/or a receiving unit. The sending unit is used to perform functions related to sending, and the receiving unit is used to perform functions related to receiving. For example, the sending unit may be a transmitter or transmitter, and the receiving unit may be a receiver or receiver. For another example, the terminal device is a communication chip, the sending unit may be an input circuit or interface of the communication chip, and the sending unit may be an output circuit or interface of the communication chip.

In a fourth aspect, the present application provides a network device configured to execute the method in the foregoing second aspect or various implementation manners thereof. Specifically, the network device includes a functional module configured to execute the method in the above second aspect or each implementation manner thereof.

In an implementation manner, the network device may include a processing unit configured to perform functions related to information processing. For example, the processing unit may be a processor.

In an implementation manner, the network device may include a sending unit and/or a receiving unit. The sending unit is used to perform functions related to sending, and the receiving unit is used to perform functions related to receiving. For example, the sending unit may be a transmitter or transmitter, and the receiving unit may be a receiver or receiver. For another example, the network device is a communication chip, the receiving unit may be an input circuit or interface of the communication chip, and the sending unit may be an output circuit or interface of the communication chip.

In a fifth aspect, the present application provides a terminal device, including a processor and a memory. The memory is used to store a computer program, and the processor is used to call and run the computer program stored in the memory, so as to execute the method in the above first aspect or each implementation manner thereof.

In an implementation manner, there are one or more processors, and one or more memories.

In an implementation manner, the memory may be integrated with the processor, or the memory may be separated from the processor.

In an implementation manner, the terminal device further includes a transmitter (transmitter) and a receiver (receiver).

In a sixth aspect, the present application provides a network device, including a processor and a memory. The memory is used to store a computer program, and the processor is used to call and run the computer program stored in the memory, so as to execute the method in the above second aspect or each implementation manner thereof.

In one implementation, the network device further includes a transmitter (transmitter) and a receiver (receiver).

In a seventh aspect, the present application provides a chip, which is used to implement any one of the above first to second aspects or the method in each implementation manner. Specifically, the chip includes: a processor, configured to call and run a computer program from the memory, so that the device installed with the chip executes any one of the above-mentioned first to second aspects or various implementations thereof method in .

In an eighth aspect, the present application provides a computer-readable storage medium for storing a computer program, and the computer program enables the computer to execute any one of the above-mentioned first to second aspects or the method in each implementation manner thereof .

In a ninth aspect, the present application provides a computer program product, including computer program instructions, the computer program instructions cause a computer to execute any one of the above first to second aspects or the method in each implementation manner.

In a tenth aspect, the present application provides a computer program, which, when run on a computer, causes the computer to execute any one of the above-mentioned first to second aspects or the method in each implementation manner.

Based on the above scheme, this application introduces the data transmission rate used in backscatter communication for terminal equipment, which can not only apply zero-power consumption terminals to the cellular Internet of Things, so as to enrich the types and quantities of link terminals in the network, but also enable Realizing the Internet of Everything can also improve data transmission performance. Exemplarily, by introducing the data transmission rate, it is beneficial to adjust the data transmission rate based on actual conditions such as channel conditions, channel interference conditions, or the distance between the zero-power terminal device and the network device, and based on the adjusted Data transmission rate for backscatter communication can improve data transmission performance.

Description of drawings

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

Fig. 2 is a schematic diagram of a zero-power communication system provided by the present application.

Fig. 3 is a schematic diagram of the energy harvesting provided by the embodiment of the present application.

Fig. 4 is a schematic diagram of backscatter communication provided by the present application.

Fig. 5 is a circuit schematic diagram of resistive load modulation provided by an embodiment of the present application.

Fig. 6 is a schematic flowchart of a wireless communication method provided by an embodiment of the present application.

Fig. 7 is a schematic diagram of subcarrier modulation provided by an embodiment of the present application.

FIG. 8 is a schematic block diagram of performing backscatter communication based on a data transmission rate determined by a coding method according to an embodiment of the present application.

FIG. 9 is a schematic block diagram of performing backscatter communication based on a data transmission rate determined by a symbol length provided by an embodiment of the present application.

Fig. 10 is another schematic flowchart of the wireless communication method provided by the embodiment of the present application.

FIG. 11 is a schematic block diagram of a terminal device provided by an embodiment of the present application.

Fig. 12 is a schematic block diagram of a network device provided by an embodiment of the present application.

Fig. 13 is a schematic block diagram of a communication device provided by an embodiment of the present application.

Fig. 14 is a schematic block diagram of a chip provided by an embodiment of the present application.

detailed description

The technical solutions in the embodiments of the present application will be described below with reference to the 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. With regard to the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection 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 describing associated objects, which means that there can be three relationships, for example, A and/or B can mean: A exists alone, A and B exist simultaneously, and there exists alone B these three situations. In addition, the character "/" in this article generally indicates that the contextual objects are an "or" relationship.

In the description of the embodiments of the present application, the term "corresponding" may indicate that there is a direct or indirect correspondence between the two, or that there is an association between the two, or that it indicates and is indicated, configuration and is configuration etc.

Embodiments of the present application can be applied to various communication systems, such as: Global System of Mobile communication (GSM) system, Code Division Multiple Access (CDMA) system, Wideband Code Division Multiple Access (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 wireless (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, NR-U) system, Universal Mobile Telecommunication System (UMTS), Wireless Local Area Networks (WLAN), Wireless Fidelity (WiFi), next generation communication system, zero power consumption communication system , cellular Internet of Things, cellular passive Internet of Things or other communication systems, etc.

Among them, the cellular Internet of Things is the development product of the combination of the cellular mobile communication network and the Internet of Things. The cellular passive Internet of Things is also called the passive cellular Internet of Things, which is composed of network devices and passive terminals. In the cellular passive Internet of Things, passive terminals can communicate with other passive terminals through network devices. Alternatively, the passive terminal can communicate in a device-to-device (D2D) communication manner, and the network device only needs to send a carrier signal, that is, an energy supply signal, to supply energy to the passive terminal.

Generally speaking, the number of connections supported by traditional communication systems is limited and easy to implement. However, with the development of communication technology, mobile communication systems will not only support traditional communication, but also support, for example, D2D communication, machine-to-machine (Machine to Machine, M2M) communication, machine type communication (Machine Type Communication, MTC), and vehicle to vehicle (Vehicle to Vehicle, V2V) 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 may be applied to a carrier aggregation (Carrier Aggregation, CA) scenario, may also be applied to a dual connectivity (Dual Connectivity, DC) scenario, and may also be applied to an independent (Standalone, SA) deployment Web scene.

The embodiment of the present application does not limit the applied frequency spectrum. For example, the embodiments of the present application may be applied to licensed spectrum, and may also be applied to unlicensed spectrum.

Exemplarily, a communication system 100 applied in this embodiment of the application is shown in FIG. 1 . The communication system 100 may include a network device 110, and the network device 110 may be a device for communicating with a terminal device 120 (or called a communication terminal, terminal). The network device 110 can provide communication coverage for a specific geographical area, and can communicate with terminal devices located in the coverage area.

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

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

It should be understood that a device with a communication function in the network/system in the embodiment of the present application may be referred to as a communication device. Taking the communication system 100 shown in FIG. 1 as an example, the communication equipment may include a network equipment 110 and a terminal equipment 120 with communication functions. The network equipment 110 and the terminal equipment 120 may be the specific equipment described above, and will not be repeated 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 this embodiment of the present application.

Embodiments of the present application describe various embodiments in conjunction with terminal equipment and network equipment, wherein: the network equipment may be a device for communicating with mobile equipment, and the network equipment may be an access point (Access Point, AP) in WLAN, GSM or A base station (Base Transceiver Station, BTS) in CDMA, a base station (NodeB, NB) in WCDMA, or an evolved base station (Evolutional Node B, eNB or eNodeB) in LTE, or a relay station or access point , or vehicle-mounted devices, wearable devices, and network devices (gNB) in NR networks or network devices in PLMN networks that will evolve in the future.

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

In this embodiment of the present application, a terminal device (User Equipment, UE) may also be referred to as a user equipment, an access terminal, a user unit, a user station, a mobile station, a mobile station, a remote station, a remote terminal, a mobile device, a user terminal, Terminal, wireless communication device, user agent or user device, etc. The terminal device can be a station (STAION, ST) in the WLAN, a cellular phone, a cordless phone, a Session Initiation Protocol (Session Initiation Protocol, SIP) phone, a wireless local loop (Wireless Local Loop, WLL) station, a personal digital processing (Personal Digital Assistant, PDA) devices, handheld devices with wireless communication functions, computing devices or other processing devices connected to wireless modems, vehicle-mounted devices, wearable devices, and next-generation communication systems, such as terminal devices in NR networks or Terminal devices in the future evolution of the Public Land Mobile Network (PLMN) network, or zero-power devices.

As an example but 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, which is a general term for the application of wearable technology to intelligently design daily wear and develop wearable devices, such as glasses, gloves, watches, clothing and shoes. 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 only a hardware device, but also achieve powerful functions through software support, data interaction, and cloud interaction. Generalized wearable smart devices include full-featured, large-sized, complete or partial functions without relying on smart phones, such as smart watches or smart glasses, etc., and only focus on a certain type of application functions, and need to cooperate with other devices such as smart phones Use, such as various smart bracelets and smart jewelry for physical sign monitoring.

It should be understood that a zero-power consumption device may be understood as a device whose power consumption is lower than a preset power consumption. For example, it includes passive terminals and even semi-passive terminals.

Exemplarily, the zero-power consumption device is a radio frequency identification (Radio Frequency Identification, RFID) tag, which is a technology for realizing non-contact automatic transmission and identification of tag information by means of spatial coupling of radio frequency signals. RFID tags are also called "radio frequency tags" or "electronic tags". According to the different power supply methods, the types of electronic tags can be divided into active electronic tags, passive electronic tags and semi-passive electronic tags. Active electronic tags, also known as active electronic tags, means that the energy of the electronic tags is provided by the battery. The battery, memory and antenna together constitute an active electronic tag, which is different from the passive radio frequency activation method. Set the frequency band to send information. Passive electronic tags, also known as passive electronic tags, do not support built-in batteries. When passive electronic tags are close to the reader, the tags are in the near-field range formed by the radiation of the reader antenna. The electronic tag antenna generates an induced current through electromagnetic induction. , the induced current drives the chip circuit of the electronic label. The chip circuit sends the identification information stored in the tag to the reader through the electronic tag antenna. Semi-passive electronic tags, also known as semi-active electronic tags, inherit the advantages of passive electronic tags such as small size, light weight, low price, and long service life. When the built-in battery is not accessed by a reader, It only provides power for a few circuits in the chip, and the built-in battery supplies power to the RFID chip only when the reader is accessing, so as to increase the reading and writing distance of the tag and improve the reliability of communication.

An RFID system is a wireless communication system. The RFID system is composed of two parts: an electronic tag (TAG) and a reader/writer (Reader/Writer). Electronic tags include coupling components and chips, and each electronic tag has a unique electronic code, which is placed on the target to achieve the purpose of marking the target object. The reader 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.

Zero-power communication uses energy harvesting and backscatter communication technologies. In order to facilitate understanding of the technical solutions of the embodiments of the present application, related technologies of zero power consumption are described.

As shown in Figure 2, the zero-power communication system consists of network equipment and zero-power terminals. The network equipment is used to send wireless power supply signals to zero-power terminals, downlink communication signals and receive backscattered signals from zero-power terminals. . A basic zero-power terminal includes an energy harvesting module, a backscatter communication module, and a low-power computing module. In addition, the zero-power consumption terminal can also have a memory or a sensor for storing some basic information (such as item identification, etc.) or obtaining sensing data such as ambient temperature and ambient humidity.

Zero-power communication can also be called communication based on zero-power terminals. The key technologies of zero-power communication mainly include radio frequency energy harvesting and backscatter communication.

1. Energy harvesting (RF Power Harvesting).

Figure 3 is a schematic diagram of the energy harvesting provided by the embodiment of the present application.

As shown in Figure 3, the radio frequency energy collection module realizes the collection of space electromagnetic wave energy based on the principle of electromagnetic induction, and then obtains the energy required to drive zero-power terminals, such as driving low-power demodulation and modulation modules, sensors and memory read, etc. Therefore, zero-power terminals do not require conventional batteries.

2. Back Scattering.

As shown in Figure 4, the zero-power communication terminal receives the wireless signal sent by the network, modulates the wireless signal, loads the information to be sent, and radiates the modulated signal from the antenna. This information transmission process is called for backscatter communication.

It should be noted that the principle of backscatter communication shown in Figure 4 is illustrated through zero-power consumption devices and network devices. In fact, any device with a backscatter communication function can implement backscatter communication.

Backscatter communication and load modulation functions are inseparable. Load modulation adjusts and controls the circuit parameters of the oscillation circuit of the zero-power terminal according to the beat of the data flow, so that the magnitude and phase of the impedance of the zero-power device change accordingly, thereby completing the modulation process. The load modulation technology mainly includes resistive load modulation and capacitive load modulation.

As shown in Figure 5, in resistive load modulation, a resistor is connected in parallel with the load, which is called a load modulation resistor. The resistor is turned on or off based on the control of the binary data flow. Amplitude keying modulation (ASK), that is, the modulation and transmission of the signal is realized by adjusting the amplitude of the backscattered signal of the zero-power terminal. Similarly, in capacitive load modulation, the circuit resonant frequency can be changed by switching on and off the capacitor, and frequency keying modulation (FSK) can be realized, that is, the modulation of the signal can be realized by adjusting the working frequency of the backscattering signal of the zero-power consumption terminal with transmission.

Since the zero-power consumption terminal performs information modulation on the incoming wave signal by means of load modulation, the backscatter communication process is realized. Therefore, zero-power terminals have significant advantages:

1. The terminal equipment does not actively transmit signals, and realizes backscatter communication by modulating the incoming wave signal.

2. Terminal equipment does not rely on traditional active power amplifier transmitters, and uses low-power computing units at the same time, which greatly reduces hardware complexity.

3. Combined with energy harvesting, battery-free communication can be realized.

It should be understood that the above-mentioned terminal device may be a zero-power consumption device (such as a passive terminal, or even a semi-passive terminal), and even the terminal device may be a non-zero power consumption device, such as an ordinary terminal, but the ordinary terminal may be in some backscatter communication.

In a specific implementation, the data transmitted by the terminal device may use different forms of codes to represent binary "1" and "0". RFID systems typically 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 coding and differential coding. In layman's terms, it is to use different pulse signals to represent 0 and 1.

Exemplarily, zero-power terminals can be divided into the following types based on the energy sources and usage methods of zero-power terminals:

1. Passive zero power consumption terminal.

The zero-power terminal does not need a built-in battery. When the zero-power terminal is close to a network device (such as a reader of an RFID system), the zero-power terminal is within the near-field range formed by the antenna radiation of the network device. Therefore, the antenna of the zero-power terminal generates an induced current through electromagnetic induction, and the induced current drives the low-power chip circuit of the zero-power terminal. Realize the demodulation of the forward link signal and the signal modulation of the backward link. For the backscatter link, the zero-power terminal uses the backscatter implementation to transmit signals.

It can be seen from this that the passive zero-power terminal does not need a built-in battery to drive it, whether it is a forward link or a reverse link, and is a real zero-power terminal. Passive zero-power terminals do not require batteries, and the RF circuit and baseband circuit are very simple, such as low-noise amplifier (LNA), power amplifier (PA), crystal oscillator, ADC, etc., so it has small size, light weight, and very low price. Cheap, long service life and many other advantages.

2. Semi-passive zero-power consumption terminal.

The semi-passive zero-power terminal itself does not install a conventional battery, but it can use the RF energy harvesting module to collect radio wave energy, and store the collected energy in an energy storage unit (such as a capacitor). After the energy storage unit obtains energy, it can drive the low-power chip circuit of the zero-power terminal. Realize the demodulation of the forward link signal and the signal modulation of the backward link. For the backscatter link, the zero-power terminal uses the backscatter implementation to transmit signals.

It can be seen from this that the semi-passive zero-power terminal does not need a built-in battery to drive either the forward link or the reverse link. Although the energy stored in the capacitor is used in the work, the energy comes from the energy collected by the energy harvesting module. radio energy, so it is also a true zero-power consumption terminal. Semi-passive zero-power terminals inherit many advantages of passive zero-power terminals, so they have many advantages such as small size, light weight, very cheap price, and long service life.

3. Active zero-power consumption terminal.

In some scenarios, the zero-power terminal used can also be an active zero-power terminal, and this type of terminal can have a built-in battery. The battery is used to drive the low-power chip circuit of the zero-power terminal. Realize the demodulation of the forward link signal and the signal modulation of the backward link. But for the backscatter link, the zero-power terminal uses the backscatter implementation to transmit the signal. Therefore, the zero power consumption of this type of terminal is mainly reflected in the fact that the signal transmission of the reverse link does not require the power of the terminal itself, but uses backscattering. That is to say, the active zero-power terminal supplies power to the RFID chip through a built-in battery, so as to increase the reading and writing distance of the zero-power terminal and improve the reliability of communication. Therefore, it can be applied in some scenarios that require relatively high communication distance and read delay.

Exemplarily, the zero-power consumption terminal may perform energy collection based on the energy supply signal.

Optionally, from the energy supply signal carrier, the energy supply signal may be a base station, a smart phone, an intelligent gateway, a charging station, a micro base station, and the like.

Optionally, in terms of frequency band, the energy supply signal may be a low-frequency, medium-frequency, high-frequency signal, etc.

Optionally, in terms of waveform, the energy supply signal may be a sine wave, a square wave, a triangle wave, a pulse, a rectangular wave, and the like.

Optionally, the energy supply signal may be a continuous wave or a discontinuous wave (that is, a certain time interruption is allowed).

Optionally, the energy supply signal may be a certain signal specified in the 3GPP standard. For example, SRS, PUSCH, PRACH, PUCCH, PDCCH, PDSCH, PBCH, etc.

It should be noted that, since the carrier signal sent by the foregoing network device can also be used to provide energy to the zero-power consumption device, the carrier signal may also be referred to as an energy supply signal.

Exemplarily, the zero-power terminal can perform backscatter communication based on the received trigger signal. Optionally, the trigger signal may be used to schedule or trigger backscatter communication of the zero-power terminal. Optionally, the trigger signal carries scheduling information of the network device, or the trigger signal is a scheduling signaling or a scheduling signal sent by the network device.

Optionally, from the energy supply signal carrier, the trigger signal can be a base station, a smart phone, an intelligent gateway, etc.;

Optionally, from the frequency band, the trigger signal may be a low-frequency, medium-frequency, high-frequency signal, etc.

Optionally, in terms of waveform, the trigger signal may be a sine wave, a square wave, a triangle wave, a pulse, a rectangular wave, and the like.

Optionally, the trigger signal may be a continuous wave or a discontinuous wave (that is, a certain time interruption is allowed).

Optionally, the trigger signal may be a certain signal specified in the 3GPP standard. For example, SRS, PUSCH, PRACH, PUCCH, PDCCH, PDSCH, PBCH, etc.; it may also be a new signal.

It should be noted that the energy supply signal and the trigger signal may be one signal, or two independent signals, which are not specifically limited in this application.

With the increase of application demand in the 5G industry, there are more and more types of connected objects and application scenarios, and there will be higher requirements for the price and power consumption of communication terminals. The application of battery-free and low-cost passive IoT devices It has become a key technology of the cellular Internet of Things, which can enrich the types and quantities of terminals in the network, and then can truly realize the Internet of Everything. Among them, passive IoT devices can be based on existing zero-power consumption devices, such as Radio Frequency Identification (RFID) technology, and extended on this basis to be suitable for cellular IoT.

In actual network deployment, a technical bottleneck faced by passive zero-power communication technology is the limited coverage distance of the forward link. The signal strength of the signal, based on the above implementation process, a general zero-power terminal needs to consume 10 microwatts (uw) of power to drive a low-power circuit. This means that the signal power reaching the zero power terminal needs to be at least -20dBm. Limited by the requirements of radio regulation, the transmission power of network equipment should generally not be too large. For example, in the ISM frequency band where RFID works, the maximum transmission power is 30dBm. Therefore, considering the radio propagation loss in space, the transmission distance of the passive zero-power terminal is generally in the range of 10m to tens of meters.

The semi-passive zero-power terminal has the potential to significantly extend the communication distance, because the semi-passive zero-power terminal can use the RF energy harvesting module to collect radio waves, so it can continuously obtain radio energy and store it in the energy storage unit middle. After the energy storage unit obtains enough energy, it can drive the low power consumption circuit to work for the signal demodulation of the forward link and the signal modulation of the reverse link. Therefore, at this time, the semi-passive zero-power terminal is equivalent to an active terminal, and its downlink coverage depends on the receiver sensitivity of the downlink signal (usually much lower than the RF energy harvesting threshold). Based on the current technology, the energy harvesting module can perform energy harvesting and input electric energy to the energy storage unit when the received radio signal strength is not lower than -30dBm. Therefore, the coverage of the forward link of the semi-passive zero-power terminal depends on the RF energy collection threshold (such as -30dBm). Compared with the passive zero-power terminal, the received radio signal strength is relaxed from -20dBm to -30dBm, so A link budget gain of 10dB can be obtained, so the downlink coverage can be improved by more than 3 times. However, while improving forward link coverage, semi-passive zero-power terminals also face the problem of reduced charging efficiency. As the received signal strength decreases, the energy that can be harvested and stored by the energy harvesting module is greatly reduced. For example, when the received signal strength is -30dBm, that is, 1 microwatt hour, the energy that can be collected and stored is far less than 1 microwatt (the efficiency of energy collection is greatly reduced).

On the other hand, as mentioned earlier, the low-power circuit of the zero-power terminal may need to consume an average power of 10uw.

From two aspects, it can be seen that since the terminal equipment needs to perform energy collection, and the distance between the terminal equipment and the network equipment is relatively long, the speed of obtaining and storing energy through energy collection is very slow. In addition, for a terminal device that is closer to the network device, even if it performs backscatter communication at a higher rate, the performance of its data transmission can be guaranteed; however, for a terminal device that is farther away from the network device, if it also uses the Backscatter communication at a higher rate will lead to an excessive block error rate (BLER), which in turn increases the number of Hybrid Automatic Repeat Request (HARQ) transmissions and ultimately reduces data transmission. performance.

Based on this, the embodiment of the present application provides a wireless communication method, terminal equipment, and network equipment, which can not only apply zero-power consumption terminals to the cellular Internet of Things, so as to enrich the types and numbers of link terminals in the network, but also truly realize The Internet of Everything can also improve data transmission performance.

FIG. 6 is a schematic flowchart of a wireless communication method 200 provided by an embodiment of the present application. The method 200 can be executed by a terminal device. Terminal device 120 as shown in FIG. 1 . Another example is the zero-power consumption terminal.

As shown in FIG. 6, the method 200 may include:

S210, determine the data transmission rate used when the terminal device performs backscatter communication;

S220. Send a backscatter signal based on the data transmission rate.

In this application, this application introduces the data transmission rate used in backscatter communication for terminal equipment, which can not only apply zero-power consumption terminals to the cellular Internet of Things to enrich the types and quantities of link terminals in the network, but also enable Realizing the Internet of Everything can also improve data transmission performance. Exemplarily, by introducing the data transmission rate, it is beneficial to adjust the data transmission rate based on actual conditions such as channel conditions, channel interference conditions, or the distance between the zero-power terminal device and the network device, and based on the adjusted Data transmission rate for backscatter communication can improve data transmission performance.

Exemplarily, for a terminal device with poor channel conditions, high channel interference intensity or far away from the network device, if the backscatter communication is performed at a higher rate, the BLER will be too large, thereby increasing the number of HARQ transmissions, Ultimately, the energy efficiency of zero-power terminals and the reliability of data transmission are reduced. However, if backscatter communication is performed based on a smaller rate, it is equivalent to reducing BLER, thereby reducing the number of HARQ transmissions, and improving The energy usage efficiency of zero-power terminals and the reliability of data transmission are improved, that is to say, the data transmission rate used for backscatter communication is introduced for terminal devices, which can improve the performance of data transmission.

It should be noted that the data transmission rate used by the terminal device involved in this application to perform backscatter communication is different from the rate used to control data transmission in the NR system.

On the one hand, the design requirements for the data transmission rate are different from the design requirements for controlling the data transmission rate in the NR system. Specifically, due to the relatively simple structure, small size, and low cost of the zero-power consumption device, it is usually Use a simpler encoding method instead of the encoding method in the NR system. Since the rate adjustment of data transmission will be affected by the encoding method, the design scheme for controlling the rate of data transmission in the NR system is not suitable for zero power consumption. equipment. On the other hand, the influencing factors of the data transmission rate used by the terminal device for backscatter communication are different from those used to control the rate of data transmission in the NR system. In zero-power communication, the channel environment is different and the interference is different. The distance between the terminal and the network nodes is also different. It is necessary to set the data transmission rate that matches the specific channel and business, that is, it is necessary to design a corresponding data transmission rate adjustment mechanism for zero-power communication. For example, when the channel condition is poor, the interference is strong, or the distance between the zero-power terminal device and the network device is relatively long, the transmission rate can be appropriately reduced to ensure or improve the data transmission performance.

In a cellular network, since zero-power devices are not powered by batteries, network devices need to provide energy supply signals for zero-power devices to obtain energy for corresponding communication processes. Wherein, the signal used for energy supply (i.e. the energy supply signal) and the signal used for information transmission (i.e. the trigger signal) may be two signals or one signal. In the RFID technology, the energy supply signal and the trigger signal may be one signal, and in the cellular passive Internet of Things technology, the energy supply signal and the trigger signal may be two independent signals. These two signals may not be sent in the same frequency band. For example, network devices continuously or intermittently send energy supply signals in a certain frequency band, zero-power devices collect energy, and after zero-power devices obtain energy, they can perform corresponding communication processes, such as measurement, channel/signal reception, channel / signal transmission, etc.

When sending a signal, the zero-power device may send on a preset resource, or send based on the scheduling of the network device (that is, receive a trigger signal and send based on the scheduling of the trigger signal).

When performing zero-power communication, the data transfer rate can be adjusted.

In one implementation, when the zero-power device sends a backscatter signal at the first rate, if the network device cannot decode it correctly, the zero-power device needs to perform the backscatter signal at a lower second rate. Transmission of scattered signals. Alternatively, a zero-power device that is closer to the network device can support a higher data transmission rate, while a zero-power device that is farther away from the network device can support a lower data transmission rate.

It should be understood that the data transmission rate used when the terminal device performs backscatter communication may also be referred to simply as a backscatter rate or a scatter rate, which is not specifically limited in this application.

Since zero-power devices cannot generate high-frequency signals, subcarriers are used for modulation in the reverse link. Fig. 7 is a schematic diagram of subcarrier modulation provided by an embodiment of the present application. As shown in Figure 7, the zero-power device first generates a low-frequency subcarrier, and then modulates the encoded baseband coded data stream on the low-frequency subcarrier to obtain a modulated subcarrier; The modulated subcarrier is modulated on a high frequency carrier to obtain a modulated high frequency subcarrier.

In some embodiments, the method 200 also includes:

receiving first indication information, where the first indication information is used to indicate the data transmission rate.

In other words, after receiving the first indication information, the terminal device determines the rate indicated by the first indication information as the data transmission rate.

Optionally, the first indication information is acquired when energy collection is completed or charging is completed.

In other words, the first indication information may be carried in a signal received after the terminal device completes energy collection or charging. For example, the first indication information is carried in a trigger signal. Specifically, when the network device sends the trigger signal for triggering the terminal device to perform backscatter communication, it may indicate the rate used by the terminal device by carrying the first indication information, that is, the data transmission rate . For the terminal device, the terminal device may obtain the first indication information from the trigger signal received for the first time after the terminal equipment completes energy collection or charging, and stores the first indication information The indicated rate is determined as the data transfer rate. Of course, the terminal device may also obtain the first indication information from the latest received trigger signal after the terminal device completes energy collection or charging, and determines the rate indicated by the first indication information as The data transmission rate is not specifically limited in this application.

Optionally, the first indication information is acquired during energy collection or charging.

In other words, the first indication information may be carried in a signal received by the terminal device during energy harvesting or charging. For example, the first indication information is carried in an energy supply signal. Specifically, the network device may send the first indication information periodically or aperiodically when sending the power supply signal. Correspondingly, the terminal device may determine the rate indicated by the first indication information received for the first time as the data transmission rate, or the terminal device may determine the rate indicated by the first indication information received last time as the data transmission rate. rate is determined as the data transfer rate.

It should be noted that the term "indication" involved in the embodiments of the present application may be a direct indication, may also be an indirect indication, and may also mean that there is 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 indicate that A indirectly indicates B, for example, A indicates C, and B can be obtained through C; it can also indicate that there is an association between A and B relation. In combination with the solution of the present application, A may be the first indication information, and B may be the data transmission rate.

In some embodiments, the S210 may include:

The data transmission rate is determined based on the strength of the first signal measured by the terminal device.

For the first signal sent by the network device, as the distance increases, the strength of the first signal gradually decreases; at the same time, the farther the terminal device is from the network device, the corresponding rate should be smaller. In this embodiment, different rates may be determined based on different signal strengths. In a specific implementation, multiple rates can be preset, and different rates are associated with energy supply signals of different signal strengths. Correspondingly, when receiving the first signal, the terminal device may detect the signal strength of the first signal, and determine a corresponding rate as the data transmission rate based on the strength of the first signal.

Optionally, the first signal is a trigger signal or an energy supply signal.

Of course, in other alternative embodiments, the first signal may also be another type of downlink signal, which is not specifically limited in the present application.

Optionally, the data transmission rate increases as the strength of the first signal increases.

Optionally, the data transmission rate decreases as the strength of the first signal decreases.

Optionally, determine a first strength class to which the strength of the first signal belongs; and determine a rate corresponding to the first strength class as the data transmission rate.

In other words, the strength of the first signal may be graded, and each grade corresponds to a rate. For example, a signal whose strength is between P1 and P2 is a first-level signal, and its signal strength is the lowest, and the first-level signal corresponds to the smallest rate, and a signal whose strength is between P2 and P3 is a second-level signal, With the next lowest signal strength, the level 2 signal is associated with the next smallest rate, and so on, up to the highest rate.

Optionally, determine a first ratio between the strength of the first signal and the strength when the network device sends the first signal, the first ratio belongs to a first ratio range; the rate corresponding to the first ratio range , determined as the data transfer rate.

In other words, according to the ratio of the strength of the first signal received by the terminal device to the strength of the first signal sent by the network device, different ratio ranges are associated with different rates. For example, the ratio between k1 and k2 belongs to the first-level ratio range, indicating that the signal strength of the first signal is the lowest, and the first-level ratio range corresponds to the smallest rate, and the ratio between k2 and k3 is the second-level ratio range, indicating that the signal strength of the first signal is the second lowest, and the second-level ratio range is associated with the second smallest rate, and so on until it is associated with the maximum rate.

In some embodiments, the S210 may include:

The data transmission rate is determined based on a first length of energy collection time or charging time of the terminal device.

In other words, for the energy supply signal sent by the network device, as the distance increases, the signal strength gradually weakens; the weaker the signal strength, the longer it takes for the terminal device to collect energy and complete charging. At the same time, the farther the terminal device is from the network device, the corresponding rate should be smaller. In this embodiment, different rates may be determined based on different charging time lengths. In the specific implementation, multiple rates can be preset, and different lengths of charging time are associated with different rates. When the terminal device receives the energy supply signal, it can perform energy collection and calculate the time required from the start of energy collection to the completion of charging. , the longer it takes from the start of energy harvesting to the completion of charging, the smaller the associated rate.

Optionally, the data transmission rate decreases as the first length increases.

Optionally, the data transmission rate increases as the first length decreases.

Optionally, determine a first length class to which the first length belongs; and determine a rate corresponding to the first length class as the data transmission rate.

In other words, the length of the energy harvesting time or charging time of the terminal device can be graded, and each level corresponds to a rate: for example, the length between t1 and t2 is the length of the first level, and the charging speed is the fastest at this time , the level 1 signal corresponds to the maximum rate. The length between t2 and t3 is the second-level length, at which time the charging speed is the second fastest, and the second-level length is associated with the second largest rate, and so on until it is associated with the smallest rate.

Optionally, determining a second ratio of the first length to a preset length, the second ratio belonging to a second ratio range; determining a rate corresponding to the second ratio range as the data transmission rate.

In other words, the ratio between the charging completion time of the terminal device and a preset charging time may be calculated, and different ratios are associated with different rates. For example, the ratio less than or equal to k1 belongs to the ratio range of the first level, and the charging speed is the fastest at this time, and the ratio range of the first level corresponds to the maximum rate. The ratio between k1 and k2 belongs to the second level ratio range, in which case the charging speed is second fastest, said second level ratio range is associated with the next highest rate, and so on, until it is associated with the smallest rate.

In some embodiments, the method 200 may also include:

The encoding mode corresponding to the data transmission rate is determined as the first encoding mode used by the terminal device.

In other words, the terminal device can support multiple encoding modes, and different encoding modes are associated with different rates. In other words, the data transmission rate can be changed by controlling the coding mode adopted by the terminal device.

In some embodiments, the method 200 may also include:

The symbol length corresponding to the data transmission rate is determined as the first symbol length used by the terminal device.

In other words, the terminal device can support multiple symbol lengths, and different symbol lengths are associated with different rates. In other words, the data transmission rate can be changed by controlling the symbol length used by the terminal equipment.

It should be noted that this application does not specifically limit the first encoding manner. Exemplarily, the first encoding manner includes, but is not limited to: several common encoding algorithms mentioned above. For example, NRZ coding, unipolar return-to-zero coding, Manchester coding, Miller coding, DBP coding, differential coding, PIE coding, etc.

In addition, the symbol length involved in this embodiment of the present application may be a time length, that is, a time length corresponding to one symbol. Optionally, the length corresponding to one symbol may refer to the length of a symbol used to carry one bit of information. For example, taking Fig. 7 as an example, the length of one symbol may refer to the time length of one bit of information on the baseband coded data stream, the time length corresponding to one bit of information on the modulated subcarrier, or the time length of the modulated high frequency The length of time on a carrier corresponding to one bit of information. For another example, for the PIE encoding method, the number of symbols used for different bits of information is different; in other words, when PIE encoding is used, the rate of the backscatter signal is low. Of course, in other alternative embodiments, the symbol may also be called a chip, symbol or frame, or the symbol length may also be called a symbol time length, which is not specifically limited in the present application.

In some embodiments, the S210 may include:

Determine a first symbol length and/or a first coding method used by the terminal device; determine the data transmission rate based on the first symbol length and/or the first coding method.

Optionally, a rate corresponding to the first symbol length is determined as the data transmission rate.

Optionally, a rate corresponding to the first encoding mode is determined as the data transmission rate.

Optionally, a rate corresponding to the first symbol length and the first coding mode is determined as the data transmission rate.

In other words, the data transmission rate may be determined only by the first symbol length or the first coding method, or the data transmission rate may be determined by the first symbol length and the first coding method rate. For example, the data transmission rate may be obtained from the rate corresponding to the first coding mode and the rate corresponding to the first symbol length.

A related solution for the terminal device to determine the first symbol length and/or the first coding mode will be described below.

In some embodiments, second indication information is received, where the second indication information is used to indicate the first symbol length and/or the first coding mode.

In other words, the terminal device determines the symbol length indicated by the second indication information as the first symbol length, and/or, the terminal device determines the coding mode indicated by the second indication information as the first symbol length. 1. Encoding method.

Optionally, the second indication information is acquired when energy collection is completed or charging is completed.

In other words, the second indication information may be carried in a signal received when the terminal device completes energy collection or charging. For example, the second indication information is carried in a trigger signal. Specifically, the network device may use the second indication information to indicate the first symbol length and/or the first encoding when sending the trigger signal for triggering the terminal device to perform backscatter communication. Way. For the terminal device, the terminal device may acquire the second indication information from the trigger signal received for the first time after the terminal equipment completes energy collection or charging, and acquires the second indication information The indicated first symbol length and/or the first coding mode. Of course, the terminal device may also acquire the second indication information from the latest received trigger signal after the terminal equipment completes energy collection or charging, and acquires the second indication information indicated by the second indication information. The length of one symbol and/or the first coding mode are not specifically limited in this application.

Optionally, the second indication information is acquired during the energy harvesting process or the charging process.

In other words, the second indication information may be carried in a signal received by the terminal device during energy harvesting or charging. For example, the second indication information is carried in an energy supply signal. Specifically, the network device may send the second indication information periodically or aperiodically when sending the power supply signal. Correspondingly, the terminal device may obtain the first symbol length and/or the first encoding method from the second indication information received for the first time, or the terminal device may obtain the first symbol length and/or the first encoding method from the latest received The first symbol length and/or the first coding mode are obtained from the second indication information.

It should be noted that the term "indication" involved in the embodiments of the present application may be a direct indication, may also be an indirect indication, and may also mean that there is 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 indicate that A indirectly indicates B, for example, A indicates C, and B can be obtained through C; it can also indicate that there is an association between A and B relation. In combination with the solution of the present application, A may be the second indication information, and B may be the first symbol length and/or the first coding mode.

In some embodiments, the first symbol length and/or the first encoding manner are determined based on the strength of the first signal measured by the terminal device.

For the first signal sent by the network device, as the distance between the terminal device and the network device increases, the strength of the first signal gradually weakens; at the same time, the farther the terminal device is from the network device, the corresponding The symbol length and/or the rate supported by the coding mode should also be smaller, that is, the longer the first symbol length is, and the first coding mode is a coding mode supporting a low rate. In this embodiment, different symbol lengths and/or encoding methods may be determined based on different signal strengths. In a specific implementation, multiple symbol lengths and/or multiple encoding modes may be preset, and energy supply signals with different signal strengths are associated with different symbol lengths and/or different encoding modes. Correspondingly, when the terminal device receives the first signal, it may detect the signal strength of the first signal, and determine the corresponding symbol length and/or encoding method as the first code based on the strength of the first signal. element length and/or the first encoding method.

Optionally, the first symbol length decreases as the strength of the first signal increases.

Optionally, the first symbol length increases as the strength of the first signal decreases.

Optionally, determine the first strength class to which the strength of the first signal belongs; determine the symbol length corresponding to the first strength class as the first symbol length, and/or set the first The coding mode corresponding to the intensity classification is determined as the first coding mode.

In other words, the strength of the first signal may be graded, and each grade corresponds to a symbol length and/or a coding mode. For example, a signal with a strength between P1 and P2 is a first-level signal, and its signal strength is the lowest. The first-level signal corresponds to the largest symbol length and/or supports the encoding method of the minimum rate, and the strength is between P2 and P2. The signal between P3 is the second-level signal, and its signal strength is the second lowest. The second-level signal is associated with the second largest symbol length and/or supports the encoding mode of the second smallest rate, and so on, until it is associated with the smallest The symbol length and/or encoding method that supports the maximum rate.

Optionally, determine a first ratio between the strength of the first signal and the strength when the network device sends the first signal, the first ratio belongs to a first ratio range; and set the code corresponding to the first ratio range to The element length is determined as the first symbol length, and/or, the encoding mode corresponding to the first ratio range is determined as the first encoding mode.

In other words, the strength of the first signal received by the terminal device may be compared with the strength of the first signal sent by the network device, and different ratio ranges are associated with different symbol lengths and/or encoding modes. For example, the ratio between k1 and k2 belongs to the first-level ratio range, indicating that the signal strength of the first signal is the lowest, and the first-level ratio range corresponds to the largest symbol length and/or the encoding with the smallest support rate way, the ratio between k2 and k3 is the second-level ratio range, indicating that the signal strength of the first signal is the second lowest, and the second-level ratio range is associated with the second largest symbol length and/or supports the second smallest rate, and so on, up to the encoding that is associated with the smallest symbol length and/or supports the largest rate.

In some embodiments, the first symbol length and/or the first encoding manner are determined based on a first length of energy collection time or charging time of the terminal device.

In other words, for the energy supply signal sent by the network device, as the distance increases, the signal strength gradually weakens; the weaker the signal strength, the longer it takes for the terminal device to collect energy and complete charging. At the same time, the farther the terminal device is from the network device, the corresponding symbol length and/or the rate supported by the encoding method should be smaller, that is, the longer the first symbol length and the lower the support rate of the first encoding method. The encoding method of the symbol length and/or encoding method. In this embodiment, different symbol lengths and/or encoding methods may be determined based on different charging time lengths. In the specific implementation, multiple symbol lengths and/or encoding methods can be preset. Different lengths of charging time are associated with different symbol lengths and/or different encoding methods. When the terminal device receives the power supply signal, it can perform Energy harvesting, and calculate the time required from the start of energy harvesting to the completion of charging. The longer the time required from the start of energy harvesting to the completion of charging, the greater the associated symbol length and/or the lower the rate supported by the encoding method.

Optionally, the first symbol length increases as the first length increases.

Optionally, the first symbol length decreases as the first length decreases.

Optionally, determine the first length class to which the first length belongs; determine the symbol length corresponding to the first length class as the first symbol length, and/or classify the first length The corresponding encoding mode is determined as the first encoding mode.

In other words, the length of the energy collection time or charging time of the terminal device can be graded, and each level corresponds to a symbol length and/or a coding method: for example, the length between t1 and t2 is the first level At this time, the charging speed is the fastest, and the first-level signal corresponds to the smallest symbol length and/or the encoding method that supports the largest rate. The length between t2 and t3 is the second-level length, and the charging speed is the second fastest at this time. The second-level length is associated with the second smallest symbol length and/or the encoding method that supports the second largest rate, and so on. Up to the encoding method associated with the largest symbol length and/or supporting the smallest rate.

Optionally, determine a second ratio of the first length to a preset length, the second ratio belongs to a second ratio range; determine the symbol length corresponding to the second ratio range as the first symbol length, and/or, determining the coding mode corresponding to the second ratio range as the first coding mode.

In other words, the ratio between the charging completion time of the terminal device and a preset charging time can be calculated, and different ratios are associated with different symbol lengths and/or different encoding modes. For example, the ratio less than or equal to k1 belongs to the ratio range of the first level, and the charging speed is the fastest at this time, and the ratio range of the first level corresponds to the minimum symbol length and/or the encoding method supporting the maximum rate. The ratio between k1 and k2 belongs to the second-level ratio range, at this time, the charging speed is the second fastest, and the second-level ratio range is associated with the second smallest symbol length and/or supports the second highest rate encoding method, so that By analogy, until it is associated with the largest symbol length and/or the encoding method that supports the smallest rate.

In some embodiments, the data transmission rate is the rate used when the first transmission of the backscatter signal fails and the terminal device resends the backscatter signal.

In other words, the data transmission rate determined in S210 is the rate used when retransmitting the backscattered signal.

Optionally, the data transmission rate is lower than the rate used in the first transmission.

Optionally, the rate used for the first transmission is a default rate. The default rate may be referred to as a default initialization rate.

Optionally, the default rate is the rate corresponding to the default encoding mode, or the default rate is the rate corresponding to the default symbol length, or the default rate is the default encoding mode and the default symbol length The rate corresponding to the length, or the default rate is a predefined rate.

As shown in Figure 8, it is assumed that the rate used for the first transmission is the rate corresponding to encoding mode 1, and the backscatter signal is sent based on the rate corresponding to encoding mode 1. When the network device cannot correctly decode the backscatter signal When the signal is scattered, the terminal device resends the backscattered signal using the encoding mode 2. Optionally, the encoding mode 1 may be a default encoding mode or an encoding mode indicated by the network device. Optionally, the rate supported by the encoding mode 2 is smaller than the rate supported by the encoding mode 1.

As shown in Figure 8, it is assumed that the rate used for the first transmission is the rate corresponding to the symbol length 1, and the backscatter signal is sent based on the rate corresponding to the symbol length 1, when the network device cannot correctly decode the When backscattering signals, the terminal device uses the symbol length 2 to resend the backscattering signals. Optionally, the symbol length 1 may be a default symbol length or a symbol length indicated by the network device. Optionally, the symbol length 2 is greater than the symbol length 1; that is, the symbol length 2 is T2, and the symbol length 1 is T1, then T2>T1.

In some embodiments, the data transmission rate is the rate used when the terminal device transmits the backscatter signal for the first time.

In other words, the data transmission rate determined in S210 is the rate used when the backscatter signal is transmitted for the first time.

Optionally, the data transmission rate is greater than the rate used when the terminal device successfully transmitted the backscatter signal last time.

In other words, when the data transmission rate determined in S210 is the rate used when the backscatter signal is transmitted for the first time, the data transmission rate is greater than the rate used when the terminal device successfully transmitted the backscatter signal last time . It should be noted that the last successfully transmitted backscatter signal may refer to a backscatter signal that has been successfully transmitted before the transmission of S220, and the last successfully transmitted backscatter signal may be a newly transmitted signal, or may be is a retransmission signal, which is not specifically limited in this application.

In some embodiments, the S210 may include:

receiving third indication information, where the third indication information is used to indicate multiple rates or to instruct the terminal device to use a first rate pattern in at least one rate pattern, where the first rate pattern includes the multiple rates , the multiple rates are rates corresponding to multiple transmission times, the multiple transmission times include the transmission times of the backscatter signal;

A rate corresponding to the number of transmissions of the backscatter signal among the multiple rates is determined as the data transmission rate.

In other words, the terminal device may determine the rate used in multiple transmissions for the backscatter signal by using the third indication information.

Optionally, the third indication information is acquired when energy collection is completed or charging is completed.

In other words, the third indication information may be carried in a signal received when the terminal device completes energy collection or charging. For example, the third indication information is carried in a trigger signal. Specifically, the network device may use the third indication information to indicate the multiple rates or the first rate pattern when sending the trigger signal for triggering the terminal device to perform backscatter communication. For the terminal device, the terminal device may acquire the third indication information from the trigger signal received for the first time after the terminal equipment completes energy collection or charging, and acquires the third indication information The plurality of rates indicated or the first rate pattern. Of course, the terminal device may also acquire the third indication information from the latest received trigger signal after the terminal equipment completes energy collection or charging, and acquires the multiple indication information indicated by the second indication information. rate or the first rate pattern, which is not specifically limited in this application.

Optionally, the third indication information is acquired during the energy harvesting process or the charging process.

In other words, the third indication information may be carried in a signal received by the terminal device during energy harvesting or charging. For example, the third indication information is carried in an energy supply signal. Specifically, the network device may send the third indication information periodically or aperiodically when sending the power supply signal. Correspondingly, the terminal device may acquire the multiple rates or the first rate pattern from the third indication information received for the first time, or the terminal device may obtain the third indication information from the latest received third indication information The plurality of rates or the first rate pattern are acquired in .

Optionally, the multiple transmission times are multiple retransmission times or the multiple transmission times include transmission times other than the first transmission.

In other words, the terminal device may determine the rate used in multiple retransmissions for the backscatter signal by using the third indication information.

Optionally, for the first transmission of the backscatter signal, the rate used by the terminal device is a default rate.

Based on the above scheme, different encoding methods and/or different symbol lengths can be associated with different rates, and the backscatter signal can be sent through the data transmission rate determined by the terminal device or the data transmission rate indicated by the network device, for example, the terminal device can The rate corresponding to the first encoding method and/or the first symbol length used is determined as the data transmission rate of the terminal device; in other words, the terminal device adjusts the rate when performing backscatter communication, especially when the zero-power When the backscatter signal is sent at the first rate, if the network device cannot decode correctly at this time, the corresponding zero-power device is required to send the backscatter signal at a lower second rate; or, the zero-power device near the network device Power-consuming devices can support higher data transmission rates, while zero-power devices that are far away from network devices can support lower data transmission rates; based on this, the performance of data transmission can be improved.

The preferred embodiments of the present application have been described in detail above in conjunction with the accompanying drawings. However, the present application is not limited to the specific details in the above embodiments. Within the scope of the technical concept of the present application, various simple modifications can be made to the technical solutions of the present application. These simple modifications all belong to the protection scope of the present application. For example, the various specific technical features described in the above specific implementation manners can be combined in any suitable manner if there is no contradiction. Separately. As another example, any combination of various implementations of the present application can also be made, as long as they do not violate the idea of the present application, they should also be regarded as the content disclosed in the present application.

It should also be understood that in various method embodiments of the present application, the sequence numbers of the above-mentioned processes do not mean the order of execution, and the order of execution of the processes should be determined by their functions and internal logic, and should not be used in this application. The implementation of the examples constitutes no limitation. In addition, in this embodiment of the application, the terms "downlink" and "uplink" are used to indicate the transmission direction of signals or data, wherein "downlink" is used to indicate that the transmission direction of signals or data is from the station to the user equipment in the cell For the first direction, "uplink" is used to indicate that the signal or data transmission direction is the second direction from the user equipment in the cell to the station, for example, "downlink signal" indicates that the signal transmission direction is the first direction. In addition, in the embodiment of the present application, the term "and/or" is only an association relationship describing associated objects, indicating that there may be three relationships. Specifically, A and/or B may mean: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" in this article generally indicates that the contextual objects are an "or" relationship.

The above describes the wireless communication method according to the embodiment of the present application in detail from the perspective of the terminal device with reference to FIG. 6 to FIG. 9 . The wireless communication method according to the embodiment of the present application is described below from the perspective of the network device in conjunction with FIG. 10 .

Fig. 10 shows a schematic flowchart of a wireless communication method 300 according to an embodiment of the present application. The method 300 may be executed by a network device, such as the network device shown in FIG. 1 .

As shown in FIG. 10, the method 300 may include:

S310, determine the data transmission rate used when the terminal device performs backscatter communication;

S320. Receive a backscatter signal based on the data transmission rate.

In some embodiments, the method 300 may also include:

Sending first indication information, where the first indication information is used to indicate the data transmission rate.

In some embodiments, the first indication information is carried in a trigger signal and/or an energy supply signal.

In some embodiments, the S310 may include:

The data transmission rate is determined based on the measured strength of the backscatter signal.

In some embodiments, the data transmission rate increases as the strength of the backscatter signal increases; or the data transmission rate decreases as the strength of the backscatter signal decreases.

In some embodiments, the second intensity classification to which the intensity of the backscatter signal belongs is determined; and the rate corresponding to the second intensity classification is determined as the data transmission rate.

In some embodiments, a third ratio of the intensity of the backscatter signal to the intensity when the network device sends the first signal is determined, the third ratio belongs to a third ratio range; the third ratio range corresponds to rate, determined as the data transfer rate.

In some embodiments, the method 300 may also include:

In some embodiments, the S310 may include:

determining a first symbol length and/or a first encoding method used by the terminal device;

The data transmission rate is determined based on the first symbol length and/or the first coding mode.

In some embodiments, the rate corresponding to the first symbol length is determined as the data transmission rate; or the rate corresponding to the first encoding method is determined as the data transmission rate; or the The rate corresponding to the first symbol length and the first coding mode is determined as the data transmission rate.

In some embodiments, the method 300 may also include:

Sending second indication information, where the second indication information is used to indicate the first symbol length and/or the first coding mode.

In some embodiments, the second indication information is carried in a trigger signal and/or an energy supply signal.

In some embodiments, the first symbol length and/or the first encoding manner are determined based on the measured strength of the backscattered signal.

In some embodiments, the first symbol length decreases as the intensity of the backscatter signal increases; or the first symbol length decreases as the intensity of the backscatter signal decreases increase.

In some embodiments, the second intensity classification to which the intensity of the backscatter signal belongs is determined; the symbol length corresponding to the second intensity classification is determined as the first symbol length, and/or, the The coding mode corresponding to the second intensity level is determined as the first coding mode.

In some embodiments, a third ratio of the intensity of the backscatter signal to the intensity when the network device sends the first signal is determined, the third ratio belongs to a third ratio range; the third ratio range corresponds to The symbol length is determined as the first symbol length, and/or, the coding mode corresponding to the third ratio range is determined as the first coding mode.

In some embodiments, the data transfer rate is less than the rate used for the first transfer.

In some embodiments, the rate used for the first transmission is a default rate.

In some embodiments, the default rate is the rate corresponding to the default encoding mode, or the default rate is the rate corresponding to the default symbol length, or the default rate is the default encoding mode and the default The rate corresponding to the symbol length, or the default rate is a predefined rate.

In some embodiments, the data transmission rate is greater than the rate used in the last successful transmission of the backscatter signal by the terminal device.

In some embodiments, the method 300 may also include:

sending third indication information, where the third indication information is used to indicate multiple rates or to instruct the terminal device to use a first rate pattern in at least one rate pattern, where the first rate pattern includes the multiple rates , the multiple rates are the rates corresponding to multiple transmission times, the multiple transmission times include the transmission times of the backscattered signal; The rate corresponding to the number of transmissions to the scattered signal.

In some embodiments, the plurality of transmission times is a plurality of retransmission times or the plurality of transmission times includes transmission times other than the first transmission.

In some embodiments, for the first transmission of the backscatter signal, the rate used by the terminal device is a default rate.

In some embodiments, the default rate is the rate corresponding to the default encoding mode, or the default rate is the rate corresponding to the default symbol length, or the default rate is the default encoding mode and the default The rate corresponding to the symbol length or the default rate is a predefined rate.

It should be understood that for steps in method 300, reference may be made to corresponding steps in method 200, and for the sake of brevity, details are not repeated here.

The method embodiment of the present application is described in detail above with reference to FIG. 1 to FIG. 10 , and the device embodiment of the present application is described in detail below in conjunction with FIG. 11 to FIG. 14 .

Fig. 11 is a schematic block diagram of a terminal device 400 according to an embodiment of the present application.

As shown in FIG. 11, the terminal device 400 may include:

A determining unit 410, configured to determine the data transmission rate used by the terminal device when performing backscatter communication;

A sending unit 420, configured to send a backscatter signal based on the data transmission rate.

In some embodiments, the determining unit 410 is further configured to:

In some embodiments, the determining unit 410 is specifically configured to:

When the energy collection is completed or the charging is completed, the first indication information is acquired.

In some embodiments, the first indication information is carried in a trigger signal.

In some embodiments, the determining unit 410 is specifically configured to:

During the energy harvesting process or the charging process, the first indication information is acquired.

In some embodiments, the first indication information is carried in an energy supply signal.

In some embodiments, the determining unit 410 is specifically configured to:

In some embodiments, the data transmission rate increases as the strength of the first signal increases; or the data transmission rate decreases as the strength of the first signal decreases.

In some embodiments, the determining unit 410 is specifically configured to:

determining a first intensity classification to which the intensity of the first signal belongs;

The rate corresponding to the first intensity level is determined as the data transmission rate.

In some embodiments, the determining unit 410 is specifically configured to:

determining a first ratio between the strength of the first signal and the strength when the network device sends the first signal, where the first ratio belongs to a first ratio range;

The rate corresponding to the first ratio range is determined as the data transmission rate.

In some embodiments, the determining unit 410 is specifically configured to:

In some embodiments, the data transmission rate decreases as the first length increases; or the data transmission rate increases as the first length decreases.

In some embodiments, the determining unit 410 is specifically configured to:

determining a first length class to which the first length belongs;

determining a rate corresponding to the first length classification as the data transmission rate.

In some embodiments, the determining unit 410 is specifically configured to:

determining a second ratio of the first length to a preset length, the second ratio belonging to a second ratio range;

The rate corresponding to the second ratio range is determined as the data transmission rate.

In some embodiments, the determining unit 410 is further configured to:

Determining the symbol length corresponding to the data transmission rate as the first symbol length used by the terminal device.

In some embodiments, the determining unit 410 is specifically configured to:

determining the rate corresponding to the first symbol length as the data transmission rate; or

determining the rate corresponding to the first encoding mode as the data transmission rate; or

determining the rate corresponding to the first symbol length and the first coding mode as the data transmission rate.

In some embodiments, the determining unit 410 is further configured to:

receiving second indication information, where the second indication information is used to indicate the first symbol length and/or the first coding mode.

In some embodiments, the determining unit 410 is specifically configured to:

When the energy collection is completed or the charging is completed, the second indication information is acquired.

In some embodiments, the second indication information is carried in a trigger signal.

In some embodiments, the determining unit 410 is specifically configured to:

During the energy harvesting process or the charging process, the second indication information is acquired.

In some embodiments, the second indication information is carried in an energy supply signal.

In some embodiments, the determining unit 410 is specifically configured to:

Determine the first symbol length and/or the first coding manner based on the strength of the first signal measured by the terminal device.

In some embodiments, the first symbol length decreases as the strength of the first signal increases; or the first symbol length increases as the strength of the first signal decreases .

In some embodiments, the determining unit 410 is specifically configured to:

Determining a symbol length corresponding to the first intensity level as the first symbol length, and/or determining an encoding mode corresponding to the first intensity level as the first encoding mode.

In some embodiments, the determining unit 410 is specifically configured to:

Determining a symbol length corresponding to the first ratio range as the first symbol length, and/or determining an encoding mode corresponding to the first ratio range as the first encoding mode.

In some embodiments, the determining unit 410 is specifically configured to:

The first symbol length and/or the first encoding manner are determined based on a first length of energy collection time or charging time of the terminal device.

In some embodiments, the first symbol length increases as the first length increases; or the first symbol length decreases as the first length decreases.

In some embodiments, the determining unit 410 is specifically configured to:

determining a first length class to which the first length belongs;

Determining a symbol length corresponding to the first length level as the first symbol length, and/or determining an encoding mode corresponding to the first length level as the first encoding mode.

In some embodiments, the determining unit 410 is specifically configured to:

Determining a symbol length corresponding to the second ratio range as the first symbol length, and/or determining an encoding mode corresponding to the second ratio range as the first encoding mode.

In some embodiments, the data transmission rate is greater than the rate at which the terminal device last successfully transmitted a backscatter signal.

In some embodiments, the determining unit 410 is specifically configured to:

It should be understood that the device embodiment and the method embodiment may correspond to each other, and similar descriptions may refer to the method embodiment. Specifically, the terminal device 400 shown in FIG. 11 may correspond to the corresponding subject in executing the method 200 of the embodiment of the present application, and the aforementioned and other operations and/or functions of each unit in the terminal device 400 are for realizing the For the sake of brevity, the corresponding processes in each method are not repeated here.

Fig. 12 is a schematic block diagram of a network device 500 according to an embodiment of the present application.

As shown in FIG. 12, the network device 500 may include:

A determining unit 510, configured to determine the data transmission rate used by the terminal device for backscatter communication;

The receiving unit 520 is configured to receive backscatter signals based on the data transmission rate.

In some embodiments, the determining unit 510 is further configured to:

In some embodiments, the determining unit 510 is specifically configured to:

determining a second intensity classification to which the intensity of the backscatter signal belongs;

A rate corresponding to the second intensity classification is determined as the data transmission rate.

In some embodiments, the determining unit 510 is specifically configured to:

determining a third ratio between the strength of the backscatter signal and the strength when the network device sends the first signal, where the third ratio belongs to a third ratio range;

The rate corresponding to the third ratio range is determined as the data transmission rate.

In some embodiments, the determining unit 510 is further configured to:

In some embodiments, the determining unit 510 is specifically configured to:

In some embodiments, the determining unit 510 is further configured to:

In some embodiments, the determining unit 510 is specifically configured to:

Based on the measured strength of the backscatter signal, the first symbol length and/or the first encoding manner are determined.

In some embodiments, the determining unit 510 is specifically configured to:

Determining a symbol length corresponding to the second intensity level as the first symbol length, and/or determining an encoding mode corresponding to the second intensity level as the first encoding mode.

In some embodiments, the determining unit 510 is specifically configured to:

Determining a symbol length corresponding to the third ratio range as the first symbol length, and/or determining an encoding mode corresponding to the third ratio range as the first encoding mode.

In some embodiments, the determining unit 510 is further configured to:

It should be understood that the device embodiment and the method embodiment may correspond to each other, and similar descriptions may refer to the method embodiment. Specifically, the network device 500 shown in FIG. 12 may correspond to the corresponding subject in the method 300 of the embodiment of the present application, and the aforementioned and other operations and/or functions of each unit in the network device 500 are respectively in order to realize the For the sake of brevity, the corresponding processes in each method are not repeated here.

The above describes the communication device in the embodiment of the present application from the perspective of functional modules with reference to the accompanying drawings. It should be understood that the functional modules may be implemented in the form of hardware, may also be implemented by instructions in the form of software, and may also be implemented by a combination of hardware and software modules. Specifically, each step of the method embodiment in the embodiment of the present application can be completed by an integrated logic circuit of the hardware in the processor and/or instructions in the form of software, and the steps of the method disclosed in the embodiment of the present application can be directly embodied as hardware The decoding processor is executed, or the combination of hardware and software modules in the decoding processor is used to complete the execution. Optionally, the software module may be located in a mature storage medium in the field such as random access memory, flash memory, read-only memory, programmable read-only memory, electrically erasable programmable memory, and registers. The storage medium is located in the memory, and the processor reads the information in the memory, and completes the steps in the above method embodiments in combination with its hardware.

For example, both the above-mentioned determining unit 410 and the above-mentioned determining unit 510 can be implemented by a processor, and the above-mentioned sending unit 420 and receiving unit 520 can be implemented by a transceiver.

Fig. 13 is a schematic structural diagram of a communication device 600 according to an embodiment of the present application.

As shown in FIG. 13 , the communication device 600 may include a processor 610 .

Wherein, the processor 610 may invoke and run a computer program from the memory, so as to implement the method in the embodiment of the present application.

As shown in FIG. 13 , the communication device 600 may further include a memory 620 .

Wherein, the memory 620 may be used to store indication information, and may also be used to store codes, instructions, etc. executed by the processor 610 . Wherein, the processor 610 can invoke and run a computer program from the memory 620, so as to implement the method in the embodiment of the present application. The memory 620 may be an independent device independent of the processor 610 , or may be integrated in the processor 610 .

As shown in FIG. 13 , the communication device 600 may further include a transceiver 630 .

Wherein, the processor 610 can control the transceiver 630 to communicate with other devices, specifically, can send information or data to other devices, or receive information or data sent by other devices. Transceiver 630 may include a transmitter and a receiver. The transceiver 630 may further include antennas, and the number of antennas may be one or more.

It should be understood that various components in the communication device 600 are connected through a bus system, wherein the bus system includes not only a data bus, but also a power bus, a control bus, and a status signal bus.

It should also be understood that the communication device 600 may be the terminal device in the embodiment of the present application, and the communication device 600 may implement the corresponding processes implemented by the terminal device in each method of the embodiment of the present application, that is, the terminal device in the embodiment of the present application The communication device 600 may correspond to the terminal device 400 in the embodiment of the present application, and may correspond to a corresponding subject in performing the method 200 according to the embodiment of the present application. For the sake of brevity, details are not repeated here. Similarly, the communication device 600 may be the network device of 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. That is to say, the communication device 600 in the embodiment of the present application may correspond to the network device 500 in the embodiment of the present application, and may correspond to the corresponding subject in executing the method 300 according to the embodiment of the present application. For the sake of brevity, no further repeat.

In addition, a chip is also provided in the embodiment of the present application.

For example, the chip may be an integrated circuit chip, which has signal processing capabilities, and can implement or execute the methods, steps and logic block diagrams disclosed in the embodiments of the present application. The chip can also be called system-on-chip, system-on-chip, system-on-chip or system-on-chip, etc. Optionally, the chip can be applied to various communication devices, so that the communication device installed with the chip can execute the methods, steps and logic block diagrams disclosed in the embodiments of the present application.

FIG. 14 is a schematic structural diagram of a chip 700 according to an embodiment of the present application.

As shown in FIG. 14 , the chip 700 includes a processor 710 .

Wherein, the processor 710 can invoke and run a computer program from the memory, so as to implement the method in the embodiment of the present application.

As shown in FIG. 14 , the chip 700 may further include a memory 720 .

Wherein, the processor 710 can invoke and run a computer program from the memory 720, so as to implement the method in the embodiment of the present application. The memory 720 may be used to store indication information, and may also be used to store codes, instructions, etc. executed by the processor 710 . The memory 720 may be an independent device independent of the processor 710 , or may be integrated in the processor 710 .

As shown in FIG. 14 , the chip 700 may further include an input interface 730 .

Wherein, the processor 710 can control the input interface 730 to communicate with other devices or chips, specifically, can obtain information or data sent by other devices or chips.

As shown in FIG. 14 , the chip 700 may further include an output interface 740 .

Wherein, the processor 710 can control the output interface 740 to communicate with other devices or chips, specifically, can output information or data to other devices or chips.

It should be understood that the chip 700 can be applied to the network device in the embodiment of the present application, and the chip can realize the corresponding process implemented by the network device in the various methods of the embodiment of the present application, and can also realize the various methods of the embodiment of the present application For the sake of brevity, the corresponding process implemented by the terminal device in , will not be repeated here.

It should also be understood that the various components in the chip 700 are connected through a bus system, wherein the bus system includes not only a data bus, but also a power bus, a control bus, and a status signal bus.

Processors mentioned above may include, but are not limited to:

General-purpose processors, digital signal processors (Digital Signal Processor, DSP), application specific integrated circuits (Application Specific Integrated Circuit, ASIC), field programmable gate arrays (Field Programmable Gate Array, FPGA) or other programmable logic devices, discrete gates Or transistor logic devices, discrete hardware components, and so on.

The processor may be used to implement or execute the methods, steps and logic block diagrams disclosed in the embodiments of the present application. The steps of the method disclosed in connection with the embodiments of the present application may be directly implemented by a hardware decoding processor, or implemented by a combination of hardware and software modules in the decoding processor. The software module may be located in a mature storage medium in the field such as random access memory, flash memory, read-only memory, programmable read-only memory or erasable programmable memory, register. 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.

The memory mentioned above includes but not limited to:

volatile memory and/or non-volatile memory. Among them, the non-volatile memory can be read-only memory (Read-Only Memory, ROM), programmable read-only memory (Programmable ROM, PROM), erasable programmable read-only memory (Erasable PROM, EPROM), electronically programmable Erase Programmable Read-Only Memory (Electrically EPROM, EEPROM) or Flash. The volatile memory can be Random Access Memory (RAM), which acts as external cache memory. By way of illustration and not limitation, many forms of RAM are available, such as 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).

It should be noted that the memories described herein are intended to include these and any other suitable types of memories.

Embodiments of the present application also provide a computer-readable storage medium for storing computer programs. The computer-readable storage medium stores one or more programs, and the one or more programs include instructions. When the instructions are executed by a portable electronic device including a plurality of application programs, the portable electronic device can perform the wireless communication provided by the application. communication method. Optionally, the computer-readable storage medium can be applied to the network device in the embodiments of the present application, and the computer program enables the computer to execute the corresponding processes implemented by the network device in the methods of the embodiments of the present application. For brevity, here No longer. Optionally, the computer-readable storage medium can be applied to the mobile terminal/terminal device in the embodiments of the present application, and the computer program enables the computer to execute the corresponding processes implemented by the mobile terminal/terminal device in the various methods of the embodiments of the present application , for the sake of brevity, it is not repeated here.

The embodiment of the present application also provides a computer program product, including a computer program. Optionally, the computer program product can be applied to the network device in the embodiment of the present application, and the computer program enables the computer to execute the corresponding process implemented by the network device in each method of the embodiment of the present application. For the sake of brevity, the repeat. Optionally, the computer program product can be applied to the mobile terminal/terminal device in the embodiments of the present application, and the computer program enables the computer to execute the corresponding processes implemented by the mobile terminal/terminal device in the methods of the embodiments of the present application, for It is concise and will not be repeated here.

The embodiment of the present application also provides a computer program. When the computer program is executed by the computer, the computer can execute the wireless communication method provided in this application. 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, the computer executes the corresponding process implemented by the network device in each method of the embodiment of the present application. For the sake of brevity , which will not be repeated here. Optionally, the computer program can be applied to the mobile terminal/terminal device in the embodiment of the present application. When the computer program is run on the computer, the computer executes each method in the embodiment of the present application to be implemented by the mobile terminal/terminal device For the sake of brevity, the corresponding process will not be repeated here.

An embodiment of the present application also provides a communication system, which may include the above-mentioned terminal device and network device to form a communication system 100 as shown in FIG. 1 , which is not repeated here for brevity. It should be noted that the terms "system" and the like in this document may also be referred to as "network management architecture" or "network system".

It should also be understood that the terms used in the embodiments of the present application and the appended claims are only for the purpose of describing specific embodiments, and are not intended to limit the embodiments of the present application. For example, the singular forms "a", "said", "above" and "the" used in the embodiments of this application and the appended claims are also intended to include plural forms unless the context clearly indicates otherwise. meaning.

Those skilled in the art can appreciate that the units and algorithm steps of the examples described in conjunction with the embodiments disclosed herein can be implemented by electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are executed by hardware or software depends on the specific application and design constraints of the technical solution. Professionals and technicians may use different methods to implement the described functions for each specific application, but such implementation should not be regarded as exceeding the scope of the embodiments of the present application. If implemented in the form of a software function unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the embodiment of the present application is essentially or the part that contributes to the prior art or the part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium , including several instructions to make a computer device (which may be a personal computer, a server, or a network device, etc.) execute all or part of the steps of the method described in the embodiment of the present application. The aforementioned storage medium includes: various media capable of storing program codes such as U disk, mobile hard disk, read-only memory, random access memory, magnetic disk or optical disk.

Those skilled in the art can also realize that for the convenience and brevity of description, the specific working process of the above-described system, device, and unit can refer to the corresponding process in the foregoing method embodiment, and details are not repeated here. In the several embodiments provided in this application, it should be understood that the disclosed systems, devices and methods may be implemented in other ways. For example, the division of units or modules or components in the above-described device embodiments is only a logical function division, and there may be other division methods in actual implementation, for example, multiple units or modules or components can be combined or integrated to another system, or some units or modules or components may be ignored, or not implemented. For another example, the units/modules/components described above as separate/display components may or may not be physically separated, that is, they may be located in one place, or may also be distributed to multiple network units. Part or all of the units/modules/components can be selected according to actual needs to achieve the purpose of the embodiments of the present application. Finally, it should be noted that the mutual coupling or direct coupling or communication connection shown or discussed above may be through some interfaces, and the indirect coupling or communication connection of devices or units may be in electrical, mechanical or other forms .

The above content is only the specific implementation of the embodiment of the application, but the scope of protection of the embodiment of the application is not limited thereto. Anyone familiar with the technical field can easily think of Any changes or substitutions shall fall within the protection scope of the embodiments of the present application. Therefore, the protection scope of the embodiments of the present application should be determined by the protection scope of the claims.

Claims

A wireless communication method, characterized in that, comprising:

Determine the data transfer rate used by the end device for backscatter communications;

A backscatter signal is sent based on the data transmission rate.
The method according to claim 1, further comprising:

receiving first indication information, where the first indication information is used to indicate the data transmission rate.
The method according to claim 2, wherein the receiving the first indication information comprises:

When the energy collection is completed or the charging is completed, the first indication information is acquired.
The method according to claim 2 or 3, wherein the first indication information is carried in a trigger signal.
The method according to claim 2, wherein the receiving the first indication information comprises:

During the energy harvesting process or the charging process, the first indication information is acquired.
The method according to claim 2 or 5, wherein the first indication information is carried in an energy supply signal.
The method according to claim 1, wherein the determining the data transmission rate used by the terminal device for backscatter communication comprises:

The data transmission rate is determined based on the strength of the first signal measured by the terminal device.
The method according to claim 7, wherein the data transmission rate increases with an increase in the strength of the first signal; or the data transmission rate decreases with a decrease in the strength of the first signal And reduce.
The method according to claim 7 or 8, wherein the determining the data transmission rate based on the strength of the first signal measured by the terminal device includes:

determining a first intensity classification to which the intensity of the first signal belongs;

The rate corresponding to the first intensity level is determined as the data transmission rate.
The method according to any one of claims 7 to 9, wherein the determining the data transmission rate based on the strength of the first signal measured by the terminal device includes:

determining a first ratio between the strength of the first signal and the strength when the network device sends the first signal, where the first ratio belongs to a first ratio range;

The rate corresponding to the first ratio range is determined as the data transmission rate.
The method according to claim 1, wherein the determining the data transmission rate used by the terminal device for backscatter communication comprises:

The data transmission rate is determined based on a first length of energy collection time or charging time of the terminal device.
The method according to claim 11, wherein the data transmission rate decreases as the first length increases; or the data transmission rate increases as the first length decreases.
The method according to claim 11 or 12, wherein the determining the data transmission rate based on the first length of energy collection time or charging time of the terminal device includes:

determining a first length class to which the first length belongs;

determining a rate corresponding to the first length classification as the data transmission rate.
The method according to any one of claims 11 to 13, wherein the determining the data transmission rate based on the first length of energy collection time or charging time of the terminal device includes:

determining a second ratio of the first length to a preset length, the second ratio belonging to a second ratio range;

The rate corresponding to the second ratio range is determined as the data transmission rate.
The method according to any one of claims 1 to 14, further comprising:

The encoding mode corresponding to the data transmission rate is determined as the first encoding mode used by the terminal device.
The method according to any one of claims 1 to 15, further comprising:

The symbol length corresponding to the data transmission rate is determined as the first symbol length used by the terminal device.
The method according to claim 1, wherein the determining the data transmission rate used by the terminal device for backscatter communication comprises:

determining a first symbol length and/or a first encoding method used by the terminal device;

The data transmission rate is determined based on the first symbol length and/or the first coding mode.
The method according to claim 17, wherein the determining the data transmission rate based on the first symbol length and/or the first encoding method comprises:

determining the rate corresponding to the first symbol length as the data transmission rate; or

determining the rate corresponding to the first encoding mode as the data transmission rate; or

determining the rate corresponding to the first symbol length and the first coding mode as the data transmission rate.
The method according to claim 17 or 18, further comprising:

receiving second indication information, where the second indication information is used to indicate the first symbol length and/or the first coding mode.
The method according to claim 19, wherein the receiving the second indication information comprises:

When the energy collection is completed or the charging is completed, the second indication information is acquired.
The method according to claim 19 or 20, wherein the second indication information is carried in a trigger signal.
The method according to claim 19, wherein the receiving the second indication information comprises:

During the energy harvesting process or the charging process, the second indication information is acquired.
The method according to claim 19 or 22, wherein the second indication information is carried in an energy supply signal.
The method according to claim 17 or 18, wherein the determining the first symbol length and/or the first encoding method used by the terminal device comprises:

Determine the first symbol length and/or the first coding manner based on the strength of the first signal measured by the terminal device.
The method according to claim 24, wherein the length of the first symbol decreases with the increase of the strength of the first signal; or the length of the first symbol decreases with the strength of the first signal strength decreases and increases.
The method according to claim 24 or 25, wherein the determining the first symbol length and/or the first encoding method based on the strength of the first signal measured by the terminal device includes:

determining a first intensity classification to which the intensity of the first signal belongs;

Determining a symbol length corresponding to the first intensity level as the first symbol length, and/or determining an encoding mode corresponding to the first intensity level as the first encoding mode.
The method according to any one of claims 24 to 25, wherein the first symbol length and/or the first encoding are determined based on the strength of the first signal measured by the terminal device. ways, including:

determining a first ratio between the strength of the first signal and the strength when the network device sends the first signal, where the first ratio belongs to a first ratio range;

Determining a symbol length corresponding to the first ratio range as the first symbol length, and/or determining an encoding mode corresponding to the first ratio range as the first encoding mode.
The method according to claim 17 or 18, wherein the determining the first symbol length and/or the first encoding method used by the terminal device comprises:

The first symbol length and/or the first encoding manner are determined based on a first length of energy collection time or charging time of the terminal device.
The method according to claim 28, wherein the length of the first symbol increases with the increase of the first length; or the length of the first symbol increases with the decrease of the first length And reduce.
The method according to claim 28 or 29, characterized in that the first symbol length and/or the first encoding method are determined based on the first length of energy collection time or charging time of the terminal device, include:

determining a first length class to which the first length belongs;

Determining a symbol length corresponding to the first length level as the first symbol length, and/or determining an encoding mode corresponding to the first length level as the first encoding mode.
The method according to any one of claims 28 to 30, wherein the first symbol length and/or the second symbol length are determined based on the first length of energy collection time or charging time of the terminal device. One encoding method, including:

determining a second ratio of the first length to a preset length, the second ratio belonging to a second ratio range;

Determining a symbol length corresponding to the second ratio range as the first symbol length, and/or determining an encoding mode corresponding to the second ratio range as the first encoding mode.
The method according to any one of claims 1 to 31, wherein the data transmission rate is such that the first transmission of the backscatter signal fails and the terminal device resends the backscatter signal. The rate to use when scattering the signal.
The method of claim 32, wherein the data transfer rate is less than the rate used for the first transfer.
The method according to claim 32, wherein the rate used for the first transmission is a default rate.
The method according to claim 34, wherein the default rate is the rate corresponding to the default coding mode, or the default rate is the rate corresponding to the default symbol length, or the default rate is The rate corresponding to the default encoding mode and the default symbol length, or the default rate is a predefined rate.
The method according to any one of claims 1 to 31, wherein the data transmission rate is the rate used when the terminal device transmits the backscatter signal for the first time.
The method of claim 36, wherein the data transmission rate is greater than the rate used the last time the terminal device successfully transmitted a backscatter signal.
The method according to claim 1, wherein the determining the data transmission rate used by the terminal device for backscatter communication comprises:

receiving third indication information, where the third indication information is used to indicate multiple rates or to instruct the terminal device to use a first rate pattern in at least one rate pattern, where the first rate pattern includes the multiple rates , the multiple rates are rates corresponding to multiple transmission times, the multiple transmission times include the transmission times of the backscatter signal;

A rate corresponding to the number of transmissions of the backscatter signal among the multiple rates is determined as the data transmission rate.
The method according to claim 38, wherein the multiple transmission times are multiple retransmission times or the multiple transmission times include transmission times other than the first transmission.
The method according to claim 38, characterized in that, for the first transmission of the backscatter signal, the rate used by the terminal device is a default rate.
The method according to claim 40, wherein the default rate is the rate corresponding to the default coding mode, or the default rate is the rate corresponding to the default symbol length, or the default rate is The rate corresponding to the default encoding mode and the default symbol length, or the default rate is a predefined rate.
A wireless communication method, characterized in that, comprising:

Determine the data transfer rate used by the end device for backscatter communications;

A backscatter signal is received based on the data transmission rate.
The method according to claim 42, further comprising:

Sending first indication information, where the first indication information is used to indicate the data transmission rate.
The method according to claim 43, wherein the first indication information is carried in a trigger signal and/or an energy supply signal.
The method according to claim 42, wherein said determining the data transmission rate used by the terminal device for backscatter communication comprises:

The data transmission rate is determined based on the measured strength of the backscatter signal.
The method according to claim 45, wherein the data transmission rate increases with the increase of the intensity of the backscatter signal; or the data transmission rate increases with the intensity of the backscatter signal Decrease and decrease.
The method according to claim 45 or 46, wherein the determining the data transmission rate based on the measured strength of the backscatter signal comprises:

determining a second intensity classification to which the intensity of the backscatter signal belongs;

A rate corresponding to the second intensity classification is determined as the data transmission rate.
The method according to any one of claims 45 to 47, wherein the determining the data transmission rate based on the measured strength of the backscatter signal comprises:

determining a third ratio between the strength of the backscatter signal and the strength when the network device sends the first signal, where the third ratio belongs to a third ratio range;

The rate corresponding to the third ratio range is determined as the data transmission rate.
The method according to any one of claims 42 to 48, further comprising:

The encoding mode corresponding to the data transmission rate is determined as the first encoding mode used by the terminal device.
The method according to any one of claims 42 to 48, further comprising:

The symbol length corresponding to the data transmission rate is determined as the first symbol length used by the terminal device.
The method according to claim 42, wherein said determining the data transmission rate used by the terminal device for backscatter communication comprises:

determining a first symbol length and/or a first encoding method used by the terminal device;

The data transmission rate is determined based on the first symbol length and/or the first coding mode.
The method according to claim 51, wherein the determining the data transmission rate based on the first symbol length and/or the first encoding method comprises:

determining the rate corresponding to the first symbol length as the data transmission rate; or

determining the rate corresponding to the first encoding mode as the data transmission rate; or

determining the rate corresponding to the first symbol length and the first coding mode as the data transmission rate.
The method according to claim 51 or 52, further comprising:

Sending second indication information, where the second indication information is used to indicate the first symbol length and/or the first coding mode.
The method according to claim 53, wherein the second indication information is carried in a trigger signal and/or an energy supply signal.
The method according to claim 51 or 52, wherein the determining the first symbol length and/or the first coding method used by the terminal device includes:

Based on the measured strength of the backscatter signal, the first symbol length and/or the first encoding manner are determined.
The method according to claim 55, wherein the first symbol length decreases as the intensity of the backscatter signal increases; or the first symbol length decreases as the backscatter signal increases. decrease in signal strength.
The method according to claim 55 or 56, wherein the determining the first symbol length and/or the first encoding method based on the measured strength of the backscatter signal comprises:

determining a second intensity classification to which the intensity of the backscatter signal belongs;

Determining a symbol length corresponding to the second intensity level as the first symbol length, and/or determining an encoding mode corresponding to the second intensity level as the first encoding mode.
The method according to any one of claims 55 to 57, wherein the first symbol length and/or the first encoding method are determined based on the measured strength of the backscattered signal ,include:

determining a third ratio between the strength of the backscatter signal and the strength when the network device sends the first signal, where the third ratio belongs to a third ratio range;

Determining a symbol length corresponding to the third ratio range as the first symbol length, and/or determining an encoding mode corresponding to the third ratio range as the first encoding mode.
The method according to any one of claims 42 to 58, wherein the data transmission rate is such that the first transmission of the backscatter signal fails and the terminal device resends the backscatter signal. The rate to use when scattering the signal.
59. The method of claim 59, wherein the data transfer rate is less than the rate used for the first transfer.
The method according to claim 60, wherein the rate used for the first transmission is a default rate.
The method according to claim 61, wherein the default rate is the rate corresponding to the default coding mode, or the default rate is the rate corresponding to the default symbol length, or the default rate is The rate corresponding to the default encoding mode and the default symbol length, or the default rate is a predefined rate.
The method according to any one of claims 42 to 58, wherein the data transmission rate is the rate used when the terminal device transmits the backscatter signal for the first time.
The method according to claim 63, wherein the data transmission rate is greater than the rate used when the terminal device successfully transmitted the backscatter signal last time.
The method according to claim 42, further comprising:

sending third indication information, where the third indication information is used to indicate multiple rates or to instruct the terminal device to use a first rate pattern in at least one rate pattern, where the first rate pattern includes the multiple rates , the multiple rates are the rates corresponding to multiple transmission times, the multiple transmission times include the transmission times of the backscattered signal; The rate corresponding to the number of transmissions to the scattered signal.
The method according to claim 65, wherein the multiple transmission times are multiple retransmission times or the multiple transmission times include transmission times other than the first transmission.
The method according to claim 65, characterized in that, for the first transmission of the backscatter signal, the rate used by the terminal device is a default rate.
The method according to claim 67, wherein the default rate is the rate corresponding to the default coding mode, or the default rate is the rate corresponding to the default symbol length, or the default rate is The rate corresponding to the default encoding mode and the default symbol length or the default rate is a predefined rate.
A terminal device, characterized in that it includes:

a determination unit, configured to determine the data transmission rate used by the terminal device for backscatter communication;

A sending unit, configured to send a backscatter signal based on the data transmission rate.
A network device, characterized in that it includes:

a determination unit, configured to determine the data transmission rate used by the terminal device for backscatter communication;

A receiving unit, configured to receive backscatter signals based on the data transmission rate.
A terminal device, characterized in that it includes:

A processor and a memory, the memory is used to store a computer program, and the processor is used to call and run the computer program stored in the memory to execute the method according to any one of claims 1 to 41.
A network device, characterized in that it includes:

A processor and a memory, the memory is used to store a computer program, and the processor is used to call and run the computer program stored in the memory to perform the method according to any one of claims 42 to 68.
A chip, characterized in that it comprises:

A processor, configured to call and run a computer program from the memory, so that the device equipped with the chip executes the method according to any one of claims 1 to 41 or any one of claims 42 to 68 Methods.
A computer-readable storage medium, characterized in that it is used to store a computer program, the computer program causes the computer to execute the method according to any one of claims 1 to 41 or any one of claims 42 to 68 the method described.
A computer program product, characterized in that it includes computer program instructions, the computer program instructions cause a computer to perform the method according to any one of claims 1 to 41 or any one of claims 42 to 68 Methods.
A computer program, characterized in that the computer program causes a computer to execute the method according to any one of claims 1-41 or the method according to any one of claims 42-68.