CN117204115A

CN117204115A - Wireless communication method, terminal device and network device

Info

Publication number: CN117204115A
Application number: CN202180097212.4A
Authority: CN
Inventors: 崔胜江; 徐伟杰; 贺传峰; 左志松; 胡荣贻; 邵帅; 张治�
Original assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Current assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority date: 2021-07-21
Filing date: 2021-07-21
Publication date: 2023-12-08
Also published as: WO2023000231A1

Abstract

The embodiment of the application provides a wireless communication method, terminal equipment and network equipment. The method comprises the following steps: determining a data transmission rate used when the terminal equipment performs backscatter communication; and transmitting a backscatter signal based on the data transmission rate. The application introduces the data transmission rate used when the backscatter communication is carried out aiming at the terminal equipment, and can not only apply the zero-power consumption terminal to the cellular internet of things so as to enrich the types and the number of the link terminals in the network, but also truly realize the internet of everything and improve the data transmission performance.

Description

Wireless communication method, terminal device and network device

Technical Field

The embodiment of the application relates to the field of communication, and more particularly relates to a wireless communication method, terminal equipment and network equipment.

Background

With the increase of application requirements in the fifth Generation mobile communication technology (5-Generation, 5G) industry, the variety and application scenario of the connectors are more and more, the price and the power consumption of the communication terminal will also have higher requirements, and the application of the battery-free and low-cost passive internet of things equipment becomes a key technology of the cellular internet of things, so that the type and the number of the terminals in the network can be enriched, and further the internet of everything can be truly realized. The passive internet of things device can be based on a zero-power-consumption terminal of radio frequency identification (Radio Frequency Identification, RFID) and extends on the basis of the zero-power-consumption terminal, so that the passive internet of things device is suitable for the cellular internet of things.

Therefore, how to apply the zero-power consumption terminal to the cellular internet of things is a technical problem that needs to be solved in the art.

Disclosure of Invention

The embodiment of the application provides a wireless communication method, terminal equipment and network equipment, which can apply a zero-power-consumption terminal to a cellular internet of things so as to enrich the types and the number of link terminals in the network, further truly realize the interconnection of everything and improve the data transmission performance.

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

determining a data transmission rate used when the terminal equipment performs backscatter communication;

and transmitting a backscatter signal based on the data transmission rate.

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

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

In a third aspect, the present application provides a terminal device for performing the method of the first aspect or each implementation manner thereof. Specifically, the terminal device includes a functional module for executing the method in the first aspect or each implementation manner thereof.

In one implementation, the terminal device may include a processing unit for performing functions related to information processing. For example, the processing unit may be a processor.

In one implementation, the terminal device may include a transmitting unit and/or a receiving unit. The transmitting unit is configured to perform a function related to transmission, and the receiving unit is configured to perform a function related to reception. For example, the transmitting unit may be a transmitter or a transmitter and the receiving unit may be a receiver or a receiver. For another example, the terminal device is a communication chip, the sending unit may be an input circuit or an interface of the communication chip, and the sending unit may be an output circuit or an interface of the communication chip.

In a fourth aspect, the present application provides a network device for performing the method of the second aspect or implementations thereof. In particular, the network device comprises functional modules for performing the method of the second aspect or implementations thereof described above.

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

In one implementation, the network device may include a transmitting unit and/or a receiving unit. The transmitting unit is configured to perform a function related to transmission, and the receiving unit is configured to perform a function related to reception. For example, the transmitting unit may be a transmitter or a transmitter and the receiving unit may be a receiver or a receiver. For another example, the network device is a communication chip, the receiving unit may be an input circuit or an interface of the communication chip, and the transmitting unit may be an output circuit or an interface of the communication chip.

In a fifth aspect, the present application provides a terminal device comprising a processor and a memory. The memory is configured to store a computer program, and the processor is configured to invoke and execute the computer program stored in the memory, so as to perform the method in the first aspect or each implementation manner thereof.

In one implementation, the processor is one or more and the memory is one or more.

In one implementation, the memory may be integrated with the processor or separate from the processor.

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

In a sixth aspect, the present application provides a network device comprising a processor and a memory. The memory is used for storing a computer program, and the processor is used for calling and running the computer program stored in the memory to execute the method in the second aspect or various implementation manners 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 for implementing the method in any one of the first to second aspects or each implementation manner thereof. Specifically, the chip includes: a processor for calling and running a computer program from a memory, causing a device on which the chip is mounted to perform the method as in any one of the first to second aspects or implementations thereof described above.

In an eighth aspect, the present application provides a computer-readable storage medium storing a computer program for causing a computer to perform the method of any one of the above first to second aspects or implementations thereof.

In a ninth aspect, the present application provides a computer program product comprising computer program instructions for causing a computer to perform the method of any one of the first to second aspects or implementations thereof.

In a tenth aspect, the present application provides a computer program which, when run on a computer, causes the computer to perform the method of any one of the first to second aspects or implementations thereof.

Based on the scheme, the application introduces the data transmission rate used when the backscattering communication is carried out for the terminal equipment, and not only can apply the zero-power consumption terminal to the cellular internet of things so as to enrich the types and the number of the link terminals in the network, but also can truly realize the internet of everything and can improve the data transmission performance. Illustratively, by introducing the data transmission rate, it is advantageous to adjust the data transmission rate based on actual conditions such as channel condition conditions, channel interference conditions, or distance between the zero-power consumption terminal device and the network device, and perform backscatter communication based on the adjusted data transmission rate, data transmission performance can be improved.

Drawings

Fig. 1 is a schematic diagram of a communication system according to an embodiment of the present application.

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

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

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

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

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

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

Fig. 8 is a schematic block diagram of backscatter communications based on a data transmission rate determined based on a coding scheme provided by an embodiment of the present application.

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

Fig. 10 is another schematic flow chart of a wireless communication method provided by an embodiment of the present application.

Fig. 11 is a schematic block diagram of a terminal device provided in 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 following description of the technical solutions according to the embodiments of the present application will be given with reference to the accompanying drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by those skilled in the art to which the application pertains without inventive faculty, are intended to fall within the scope of the application.

It should be understood that the terms "system" and "network" are used interchangeably herein. The term "and/or" is herein merely an association relationship describing an associated object, meaning that there may be three relationships, e.g., a and/or B, may represent: a exists alone, A and B exist together, and B exists alone. In addition, the character "/" herein generally indicates that the front and rear associated 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 correspondence or an indirect correspondence between the two, or may indicate that there is an association between the two, or may indicate a relationship between the two and the indicated, configured, etc.

The embodiment of the application can be applied to various communication systems, such as: global system for mobile communications (Global System of Mobile communication, GSM), code division multiple access (Code Division Multiple Access, CDMA) system, wideband code division multiple access (Wideband Code Division Multiple Access, WCDMA) system, general packet Radio service (General Packet Radio Service, GPRS), long term evolution (Long Term Evolution, LTE) system, long term evolution advanced (Advanced long term evolution, LTE-a) system, new Radio (NR) system, evolution system of NR system, LTE-based access to unlicensed spectrum, LTE-U) system over unlicensed spectrum, NR (NR-based access to unlicensed spectrum, NR-U) system over unlicensed spectrum, universal mobile communication system (Universal Mobile Telecommunication System, UMTS), wireless local area network (Wireless Local Area Networks, WLAN), wireless fidelity (Wireless Fidelity, wiFi), next generation communication system, zero power consumption communication system, cellular internet of things, cellular passive internet of things or other communication system, etc.

The cellular internet of things is a development product of combining a cellular mobile communication network with the internet of things. The cellular passive internet of things, also referred to as passive cellular internet of things, is a combination of a network Device and a passive terminal, where in the cellular passive internet of things, the passive terminal may communicate with other passive terminals through the network Device, or the passive terminal may 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, the number of connections supported by the conventional communication system is limited and easy to implement, however, as the communication technology advances, the mobile communication system will support not only conventional communication but also, for example, D2D communication, machine-to-machine (Machine to Machine, M2M) communication, machine type communication (Machine Type Communication, MTC), and inter-vehicle (Vehicle to Vehicle, V2V) communication, etc., and 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, a dual connectivity (Dual Connectivity, DC) scenario, or a Stand Alone (SA) fabric scenario.

The frequency spectrum of the application of the embodiment of the application is not limited. For example, the embodiment of the application can be applied to licensed spectrum and unlicensed spectrum.

An exemplary communication system 100 to which embodiments of the present application may be applied is shown in fig. 1. The communication system 100 may include a network device 110, and the network device 110 may be a device that communicates with a terminal device 120 (or referred to as a communication terminal, terminal). Network device 110 may provide communication coverage for a particular geographic area and may communicate with terminal devices located within the coverage area.

Fig. 1 illustrates one network device and two terminal devices by way of example, and the communication system 100 may alternatively include multiple network devices and may include other numbers of terminal devices within the coverage area of each network device, as embodiments of the application are not limited in this regard.

Optionally, the communication system 100 may further include a network controller, a mobility management entity, and other network entities, which are not limited by the embodiment of the present application.

It should be understood that a device having a communication function in a network/system according to an 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 device may include a network device 110 and a terminal device 120 with communication functions, where the network device 110 and the terminal device 120 may be specific devices described above, and are not described herein again; the communication device may also include other devices in the communication system 100, such as a network controller, a mobility management entity, and other network entities, which are not limited in this embodiment of the present application.

The embodiments of the present application describe various embodiments in connection with a terminal device and a network device, wherein: the network device may be a device for communicating with the mobile device, the network device may be an Access Point (AP) in WLAN, a base station (Base Transceiver Station, BTS) in GSM or CDMA, a base station (NodeB, NB) in WCDMA, an evolved base station (Evolutional Node B, eNB or eNodeB) in LTE, or a relay station or an Access Point, or a vehicle device, a wearable device, and a network device (gNB) in NR network, or a network device in future evolved PLMN network, etc.

In the embodiment of the present application, a network device provides a service for a cell, and a terminal device communicates with the network device through a transmission resource (for example, a frequency domain resource, or a spectrum resource) used by the cell, where the cell may be a cell corresponding to the network device (for example, a base station), and the cell may belong to a macro base station or a base station corresponding to a Small cell (Small cell), where the Small cell may include: urban cells (Metro cells), micro cells (Micro cells), pico cells (Pico cells), femto cells (Femto cells) and the like, and the small cells have the characteristics of small coverage area and low transmitting power and are suitable for providing high-rate data transmission services.

In an embodiment of the present application, a terminal device (UE) may also be referred to as a User Equipment, an access terminal, a subscriber unit, a subscriber station, a mobile station, a remote terminal, a mobile device, a User terminal, a wireless communication device, a User agent, or a User Equipment. The terminal device may be a Station (ST) in a WLAN, may be a cellular telephone, a cordless telephone, a session initiation protocol (Session Initiation Protocol, SIP) phone, a wireless local loop (Wireless Local Loop, WLL) station, a personal digital assistant (Personal Digital Assistant, PDA) device, a handheld device with wireless communication capabilities, a computing device or other processing device connected to a wireless modem, a vehicle mounted device, a wearable device, and a next generation communication system, e.g. a terminal device in an NR network or a terminal device in a future evolved public land mobile network (Public Land Mobile Network, PLMN) network, or a zero power consumption device, etc.

By way of example, and not limitation, in embodiments of the present application, the terminal device may also be a wearable device. The wearable device can also be called as a wearable intelligent device, and is a generic name for intelligently designing daily wear by applying wearable technology and developing wearable devices, such as glasses, gloves, watches, clothes, shoes and the like. The wearable device is a portable device that is worn directly on the body or integrated into the clothing or accessories of the user. The wearable device is not only a hardware device, but also can realize a powerful function through software support, data interaction and cloud interaction. The generalized wearable intelligent device includes full functionality, large size, and may not rely on the smart phone to implement complete or partial functionality, such as: smart watches or smart glasses, etc., and focus on only certain types of application functions, and need to be used in combination with other devices, such as smart phones, for example, various smart bracelets, smart jewelry, etc. for physical sign monitoring.

It is understood that a zero power consumption device may be understood as a device having a power consumption lower than a preset power consumption. Including for example passive terminals and even semi-passive terminals etc.

Illustratively, the zero-power device is a radio frequency identification (Radio Frequency Identification, RFID) tag, which is a technology for realizing automatic transmission and identification of contactless tag information by using a radio frequency signal space coupling mode. RFID tags are also known as "radio frequency tags" or "electronic tags". The types of the electronic tags divided according to different power supply modes can be divided into active electronic tags, passive electronic tags and semi-passive electronic tags. The active electronic tag is also called an active electronic tag, namely the energy of the electronic tag is provided by a battery, the battery, a memory and an antenna form the active electronic tag together, and the active electronic tag is different from a passive radio frequency activation mode and transmits information through a set frequency band before the battery is replaced. The passive electronic tag is also called as a passive electronic tag, and does not support an internal battery, when the passive electronic tag approaches a reader-writer, the tag is in a near field range formed by the radiation of the reader-writer antenna, and the electronic tag antenna generates induction current through electromagnetic induction, and the induction current drives an electronic tag chip circuit. The chip circuit sends the identification information stored in the tag to the reader-writer through the electronic tag antenna. The semi-passive electronic tag is also called as a semi-active electronic tag, and inherits the advantages of small size, light weight, low price and long service life of the passive electronic tag, when the built-in battery does not have access of a reader-writer, only a few circuits in a chip are provided with power supply, and when the reader-writer accesses, the built-in battery supplies power to the RFID chip, so that the read-write distance of the tag is increased, and the reliability of communication is improved.

An RFID system is a wireless communication system. The RFID system is composed of an electronic TAG (TAG) and a Reader/Writer. The electronic tag comprises a coupling component and a chip, and each electronic tag is provided with a unique electronic code and is placed on a measured target so as to achieve the purpose of marking the target object. The reader-writer not only can read information on the electronic tag, but also can write information on the electronic tag, and simultaneously provides energy required by communication for the electronic tag.

The zero power consumption communication adopts the energy collection and back scattering communication technology. In order to facilitate understanding of the technical scheme of the embodiment of the application, the related technology of zero power consumption is described.

As shown in fig. 2, the zero-power communication system is composed of a network device and a zero-power terminal, wherein the network device is used for transmitting a wireless power supply signal to the zero-power terminal, receiving a downlink communication signal and receiving a back-scattered signal of the zero-power terminal. A basic zero-power consumption terminal comprises an energy acquisition module, a backscattering communication module and a low-power consumption calculation module. In addition, the zero-power consumption terminal can be provided with a memory or a sensor for storing basic information (such as article identification and the like) or acquiring sensing data of ambient temperature, ambient humidity and the like.

Zero-power communication may also be referred to as communication based on zero-power terminals, and key technologies for zero-power communication mainly include radio frequency energy harvesting and backscatter communication.

1. Energy harvesting (RF Power Harvesting).

Fig. 3 is a schematic diagram of energy harvesting according to an embodiment of the present application.

As shown in fig. 3, the radio frequency energy acquisition module acquires the space electromagnetic wave energy based on the electromagnetic induction principle, so as to obtain the energy required by driving the zero-power consumption terminal to work, for example, the radio frequency energy acquisition module is used for driving a low-power consumption demodulation and modulation module, a sensor, a memory reading module and the like. Therefore, the zero power consumption terminal does not need a conventional battery.

2. Backscatter communication (Back Scattering).

As shown in fig. 4, the zero power consumption communication terminal receives a wireless signal transmitted by a network, modulates the wireless signal, loads information to be transmitted, and radiates the modulated signal from an antenna, and this information transmission process is called backscatter communication.

It should be noted that the principle of backscatter communication shown in fig. 4 is illustrated by a zero power consumption device and a network device, and practically any device having a backscatter communication function can implement backscatter communication.

The backscatter communication and load modulation functions are inseparable. The load modulation is realized by adjusting and controlling circuit parameters of an oscillation loop of the zero-power consumption terminal according to the beat of a data stream, so that the impedance and the phase of zero-power consumption equipment are changed accordingly, and the modulation process is completed. The load modulation technique mainly comprises two modes of resistance load modulation and capacitance load modulation.

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

As shown in fig. 5, in resistive load modulation, a resistor is connected in parallel to a load, which is called a load modulation resistor, and the resistor is turned on or off based on control of binary data stream, and the on-off of the resistor causes a change of circuit voltage, so that amplitude-shift keying modulation (ASK) is implemented, that is, modulation and transmission of signals are implemented by adjusting the amplitude of a backscatter signal of a zero-power consumption terminal. Similarly, in capacitive load modulation, the change of the resonant frequency of the circuit can be realized through the on-off of the capacitor, so as to realize frequency keying modulation (FSK), namely, the modulation and transmission of the signal are realized by adjusting the working frequency of the backscattering signal of the zero-power-consumption terminal.

The zero-power consumption terminal carries out information modulation on the incoming wave signal by means of load modulation, so that the backscattering communication process is realized. Thus, a zero power consumption terminal has the significant advantage:

1. The terminal equipment does not actively transmit signals, and the backscattering communication is realized by modulating incoming wave signals.

2. The terminal equipment does not depend on a traditional active power amplifier transmitter, and meanwhile, a low-power consumption computing unit is used, so that hardware complexity is greatly reduced.

3. Battery-free communication can be achieved in conjunction with energy harvesting.

It should be appreciated that the above-described terminal device may be a zero-power device (e.g., a passive terminal, even a semi-passive terminal), or even a non-zero-power device such as a normal terminal, which may in some cases perform backscatter communication.

In a specific implementation, the data transmitted by the terminal device may represent binary "1" and "0" by codes in different forms. Radio frequency identification systems typically use one of the following encoding methods: reverse non return to zero (NRZ) encoding, manchester encoding, unipolar return to zero (unipole RZ) encoding, differential bi-phase (DBP) encoding, miller (Miller) encoding, and differential encoding. In popular terms, 0 and 1 are represented by different pulse signals.

By way of example, zero power terminals may be classified into the following types based on their energy source and manner of use:

1. Passive zero power consumption terminals.

The zero-power consumption terminal does not need to be provided with a battery, and when the zero-power consumption terminal approaches to the network equipment (such as a reader-writer of an RFID system), the zero-power consumption terminal is in a near field range formed by the radiation of an antenna of the network equipment. Therefore, the zero-power-consumption terminal antenna generates induction current through electromagnetic induction, and the induction current drives a low-power-consumption chip circuit of the zero-power-consumption terminal. Demodulation of the forward link signal, signal modulation of the backward link, and the like are realized. For the backscatter link, the zero power terminals use a backscatter implementation for signal transmission.

It can be seen that the passive zero-power terminal is a true zero-power terminal, and no built-in battery is needed for driving the passive zero-power terminal in both the forward link and the reverse link. The passive zero-power-consumption terminal does not need a battery, and the radio frequency circuit and the baseband circuit are very simple, for example, low Noise Amplifier (LNA), power Amplifier (PA), crystal oscillator, ADC and the like are not needed, so that the passive zero-power-consumption terminal has the advantages of small volume, light weight, very low price, long service life and the like.

2. A semi-passive zero power terminal.

The semi-passive zero power terminals themselves do not have conventional batteries mounted, but can use RF energy harvesting modules to harvest radio wave energy while storing the harvested energy in an energy storage unit (e.g., capacitor). After the energy storage unit obtains energy, the low-power consumption chip circuit of the zero-power consumption terminal can be driven. Demodulation of the forward link signal, signal modulation of the backward link, and the like are realized. For the backscatter link, the zero power terminals use a backscatter implementation for signal transmission.

Therefore, the semi-passive zero-power-consumption terminal is driven by a built-in battery in both a forward link and a reverse link, and the energy stored by the capacitor is used in the work, but the energy is derived from the wireless energy acquired by the energy acquisition module, so that the semi-passive zero-power-consumption terminal is a true zero-power-consumption terminal. The semi-passive zero-power-consumption terminal inherits the advantages of the passive zero-power-consumption terminal, so that the semi-passive zero-power-consumption terminal has the advantages of small volume, light weight, low price, long service life and the like.

3. An active zero power terminal.

In some scenarios, the zero-power terminals used may also be active zero-power terminals, which may have a built-in battery. The battery is used for driving the low-power chip circuit of the zero-power terminal. Demodulation of the forward link signal, signal modulation of the backward link, and the like are realized. For the backscatter link, however, the zero power terminals use a backscatter implementation for signal transmission. Thus, the zero power consumption of such terminals is mainly reflected in the fact that the signal transmission of the reverse link does not require the terminal's own power, but rather uses a back-scattering approach. That is, the active zero-power terminal supplies power to the RFID chip through the built-in battery, so that the read-write distance of the zero-power terminal is increased, and the reliability of communication is improved. Therefore, in some fields requiring relatively high communication distance, read delay and the like, the method is applied.

For example, a zero power consumption terminal may perform energy harvesting based on the energizing signal.

Alternatively, 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, etc.

Alternatively, from the frequency band, the energy supply signal may be a low frequency, an intermediate frequency, a high frequency signal, or the like.

Alternatively, the energizing signal may be sinusoidal, square wave, triangular, pulsed, rectangular, etc. in waveform.

Alternatively, the energizing signal may be a continuous wave or a discontinuous wave (i.e., allowing a certain time to break).

Alternatively, the energizing 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 network device may also be used to provide energy to the zero-power device, the carrier signal may also be referred to as an energy supply signal.

For example, a zero power consumption terminal may perform backscatter communications based on a received trigger signal. Alternatively, the trigger signal may be used to schedule or trigger zero power consumption terminal backscatter communications. 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 may be a base station, a smart phone, an intelligent gateway, etc.;

alternatively, from the frequency band, the trigger signal may be a low frequency, an intermediate frequency, a high frequency signal, or the like.

Alternatively, from the waveform, the trigger signal may be a sine wave, a square wave, a triangle wave, a pulse, a rectangular wave, or the like.

Alternatively, the trigger signal may be a continuous wave or a discontinuous wave (i.e., allowing a certain time to break).

Alternatively, the trigger signal may be a certain signal specified in the 3GPP standard. Such as SRS, PUSCH, PRACH, PUCCH, PDCCH, PDSCH, PBCH, etc.; a new signal is also possible.

It should be noted that the power supply signal and the trigger signal may be one signal or may be 2 independent signals, which is not particularly limited in the present application.

Along with the increase of application demands in the 5G industry, the types and application scenes of the connectors are more and more, the price and the power consumption of the communication terminal are also higher, and the application of the battery-free and low-cost passive internet of things equipment becomes a key technology of the cellular internet of things, so that the types and the number of the terminals in the network can be enriched, and further, the internet of everything can be truly realized. The passive internet of things device can be based on the existing zero-power consumption device, such as wireless radio frequency identification (Radio Frequency Identification, RFID) technology, and extends on the basis of the zero-power consumption device, so that the passive internet of things device is suitable for the cellular internet of things.

In practical network deployment, one technical bottleneck faced by passive zero-power communication technology is that the coverage distance of the forward link is limited, mainly because the communication distance of the forward link is limited by the signal strength of the wireless signal reaching the zero-power terminal, and based on the implementation process, the zero-power terminal generally needs to consume 10 microwatts (uw) of power to drive a low-power circuit. This means that the signal power to reach the zero-power terminals needs to be at least-20 dBm. The transmission power of the network device, limited by radio regulatory requirements, generally cannot be too high, for example, in the ISM band of RFID operation, with a maximum transmission power of 30dBm. Therefore, the transmission distance of a passive zero-power terminal is generally in the range of 10m to several tens of meters in consideration of radio propagation loss in space.

The semi-passive zero-power terminal has the potential of remarkably expanding the communication distance, because the semi-passive zero-power terminal can collect radio waves by using the RF energy collection module, and can continuously acquire and store radio energy in the energy storage unit. After the energy storage unit obtains enough energy, the low-power consumption circuit can be driven to work for signal demodulation of the forward link, signal modulation of the reverse link and the like. Thus, a semi-passive zero-power terminal is equivalent to an active terminal, whose downstream coverage depends on the receiver sensitivity of the downstream signal (typically well below the RF energy acquisition threshold). Based on the current technology, the energy harvesting module can harvest energy and input electrical energy to the energy storage unit when the received radio signal strength is not lower than-30 dBm. Thus, the forward link coverage of a semi-passive zero-power terminal depends on the RF energy acquisition threshold (e.g., -30 dBm), and the received radio signal strength is relaxed from-20 dBm to-30 dBm relative to a passive zero-power terminal, thus a link budget gain of 10dB can be achieved, and thus the downlink coverage can be improved by more than a factor of 3. 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 the energy harvesting module can harvest and store decreases substantially. For example, at a received signal strength of-30 dBm, i.e., 1 microwatt, the energy that can be collected and stored is far less than 1 microwatt (energy collection efficiency is greatly reduced).

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

As can be seen from the two aspects, the terminal device needs to collect energy, and when the terminal device is far away from the network device, the speed of obtaining and storing energy by the energy collection is very slow. In addition, for terminal equipment which is closer to the network equipment, even if the terminal equipment performs back scattering communication at a higher speed, the data transmission performance of the terminal equipment can be ensured; however, for a terminal device far away from the network device, if it performs backscatter communication at a higher rate as well, the block error rate (BLER) is too large, and thus the number of transmissions of the hybrid automatic repeat request (Hybrid Automatic Repeat Request, HARQ) is increased, and eventually the performance of data transmission is reduced.

Based on the above, the embodiment of the application provides a wireless communication method, terminal equipment and network equipment, which can apply the zero-power-consumption terminal to the cellular internet of things so as to enrich the types and the number of the link terminals in the network, thereby truly realizing everything interconnection and improving the data transmission performance.

Fig. 6 is a schematic flow chart of a wireless communication method 200 provided by an embodiment of the present application. The method 200 may be performed by a terminal device. Such as terminal device 120 shown in fig. 1. And further such as a zero power consumption terminal.

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

s210, determining a data transmission rate used when the terminal equipment performs back scattering communication;

and S220, transmitting a back scattering signal based on the data transmission rate.

According to the application, the data transmission rate used in the process of carrying out the back scattering communication is introduced to the terminal equipment, so that the zero-power-consumption terminal can be applied to the cellular internet of things to enrich the types and the number of the link terminals in the network, thereby truly realizing the internet of everything and improving the data transmission performance. Illustratively, by introducing the data transmission rate, it is advantageous to adjust the data transmission rate based on actual conditions such as channel condition conditions, channel interference conditions, or distance between the zero-power consumption terminal device and the network device, and perform backscatter communication based on the adjusted data transmission rate, data transmission performance can be improved.

For example, if the terminal device with poor channel condition and high channel interference intensity or far away from the network device performs the back scattering communication at a high rate, the BLER is too high, and thus the HARQ transmission frequency is increased, and finally the energy use efficiency and the reliability of the data transmission of the zero-power terminal are reduced, however, if the back scattering communication is performed based on a low rate, the BLER can be reduced, and thus the HARQ transmission frequency is reduced, that is, the energy use efficiency and the reliability of the data transmission of the zero-power terminal are improved, that is, the data transmission rate used when performing the back scattering communication is introduced for the terminal device, and the performance of the data transmission can be improved.

The data transmission rate used when the terminal device according to the present application performs the backscatter communication is different from the rate used for controlling the data transmission in the NR system.

On the one hand, the design requirement of the data transmission rate is different from the design requirement of the NR system for controlling the data transmission rate, specifically, the zero-power device has a relatively simple structure, small volume and low cost, so that a relatively simple coding mode is usually used instead of the coding mode in the NR system, and since the rate adjustment of the data transmission rate is affected by the coding mode, the design scheme of the NR system for controlling the data transmission rate is not suitable for the zero-power device. On the other hand, the influence factor of the data transmission rate used when the terminal equipment performs the backscatter communication is different from the influence factor of the rate used for controlling the data transmission in the NR system, in the zero-power consumption communication, the channel environment is different, the interference is different, the distance between the terminal and the network node is different, the data transmission rate matched with a specific channel, the service and the like needs to be set, namely, a corresponding mechanism for adjusting the data transmission rate needs to be designed for the zero-power consumption communication. For example, when the channel condition is poor, the interference is strong, or the distance between the zero-power consumption terminal device and the network device is long, the transmission rate can be reduced appropriately, and the data transmission performance can be ensured or improved.

In cellular networks, since the zero-power devices are not battery powered, an energizing signal needs to be provided by the network device for the zero-power devices to obtain energy in order to perform a corresponding communication procedure. The signal for supplying power (i.e., the power supply signal) and the signal for transmitting information (i.e., the trigger signal) may be two signals or one signal. In the RFID technology, the power supply signal and the trigger signal may be one signal, and in the cellular passive internet of things technology, the power supply signal and the trigger signal may be two independent signals. The two signals may not be transmitted in one frequency band. For example, the network device continuously or intermittently transmits the energy supply signal in a certain frequency band, the zero-power consumption device performs energy collection, and after the zero-power consumption device obtains energy, the corresponding communication process, such as measurement, channel/signal receiving, channel/signal transmitting and the like, can be performed.

When the signal is transmitted, the zero power consumption device may transmit on a preset resource, or may transmit based on the scheduling of the network device (i.e., receive the trigger signal, and transmit based on the scheduling of the trigger signal).

The data transmission rate may be adjusted when zero power consumption communication is performed.

In one implementation, when a zero-power device transmits a backscatter signal at a first rate, then if the network device is not able to decode properly, the zero-power device is required to transmit the backscatter signal at a second, lower rate, accordingly. Still alternatively, zero power devices closer to the network device may support higher data transfer rates, while zero power devices farther from the network device may support lower data transfer rates.

It should be understood that the data transmission rate used when the terminal device performs backscatter communication may also be simply referred to as a backscatter rate or a scatter rate, which is not particularly limited by the present 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 in an embodiment of the present application. As shown in fig. 7, the zero power device generates a low frequency subcarrier, and then modulates the encoded baseband encoded data stream on the low frequency subcarrier to obtain a modulated subcarrier; and then, modulating the modulation subcarrier on the high-frequency carrier by a load modulation mode to obtain the modulation high-frequency subcarrier.

In some embodiments, the method 200 further comprises:

and receiving first indication information, wherein the first indication information is used for indicating 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, when the energy collection or the charging is completed, the first indication information is obtained.

In other words, the first indication information may be carried in a signal received after the terminal device completes energy harvesting or charging. For example, the first indication information is carried in a trigger signal. Specifically, when the network device sends a trigger signal for triggering the terminal device to perform backscatter communication, the network device indicates the rate used by the terminal device, that is, the data transmission rate, by carrying the first indication information. For the terminal device, after the terminal device completes energy collection or charging, the terminal device may acquire the first indication information from the trigger signal received for the first time, and determine the rate indicated by the first indication information as the data transmission 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 determine the rate indicated by the first indication information as the data transmission rate, which is not particularly limited in the present application.

Optionally, the first indication information is obtained in an energy collection process or a charging process.

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

It should be noted that, in the embodiment of the present application, the term "indication" may be a direct indication, an indirect indication, or an indication having an association relationship. For example, a indicates B, which may mean that a indicates B directly, e.g., B may be obtained by a; it may also indicate that a indicates B indirectly, e.g. a indicates C, B may be obtained by C; it may also be indicated that there is an association between a and B. In combination with the scheme 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.

Aiming at a first signal sent by network equipment, the strength of the first signal gradually weakens along with the increase of the distance; meanwhile, the further away from the network device, the smaller should be the corresponding rate. In this embodiment, different rates may be determined based on different signal strengths. In a specific implementation, a plurality of rates may be preset, and energy supply signals with different signal strengths are associated with different rates. Accordingly, when the terminal device receives the first signal, the terminal device may detect the signal strength of the first signal, and determine the 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 energizing signal.

Of course, in other alternative embodiments, the first signal may be other types of downlink signals, which is not limited in detail by the present application.

Optionally, the data transmission rate increases with an increase in the strength of the first signal.

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

Optionally, determining a first intensity classification to which the intensity of the first signal belongs; and determining the rate corresponding to the first intensity classification as the data transmission rate.

In other words, the strength of the first signal may be graded, one for each stage. For example, a signal with an intensity between P1 and P2 is a first level signal with the lowest signal intensity, the first level signal corresponding to the smallest rate, a signal with an intensity between P2 and P3 is a level 2 signal with the next lowest signal intensity, the level 2 signal is associated with the next smallest rate, and so on, until it is associated with the largest rate.

Optionally, determining a first ratio of the intensity of the first signal to the intensity of the first signal when the network device sends the first signal, where the first ratio belongs to a first ratio range; and determining the rate corresponding to the first ratio range as the data transmission rate.

In other words, different rates may be associated with different ratio ranges according to the ratio between the strength of the first signal received by the terminal device and the strength of the first signal when the network device transmits the first signal. For example, a ratio between k1 and k2 belongs to a level 1 ratio range, indicating that the signal strength of the first signal is lowest, the level 1 ratio range corresponds to a minimum rate, a ratio between k2 and k3 is a level 2 ratio range, indicating that the signal strength of the first signal is next lowest, the level 2 ratio range correlates to a next lowest rate, and so on, until it correlates to a maximum rate.

In some embodiments, the S210 may include:

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

In other words, for the energy supply signal sent by the network device, the signal strength gradually decreases as the distance becomes larger; the weaker the signal strength is, the longer the terminal device can collect energy and the charging can be completed. Meanwhile, the further away from the network device, the smaller should be the corresponding rate. In this embodiment, different rates may be determined based on different lengths of charging time. In a specific implementation, a plurality of rates can be preset, different rates are associated with charging time of different lengths, when the terminal equipment receives an energy supply signal, energy collection can be performed, the time required from starting energy collection to finishing charging is calculated, and the longer the time required from starting energy collection to finishing charging is, the smaller the associated rate is.

Optionally, the data transmission rate decreases with increasing first length.

Optionally, the data transmission rate increases with decreasing the first length.

Optionally, determining a first length hierarchy to which the first length belongs; and determining the rate corresponding to the first length grade as the data transmission rate.

In other words, the length of the energy harvesting time or charging time of the terminal device may be graded, each grade corresponding to a rate: for example, the length between t1 and t2 is the 1 st stage length, where the charging speed is the fastest, and the 1 st stage signal corresponds to the largest speed. The length between t2 and t3 is the level 2 length, at which time the charging speed is the next highest, the level 2 length being associated with the next highest rate, and so on, until it is associated with the lowest rate.

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

In other words, the ratio may be made according to the time for the terminal device to complete charging and a preset charging time, where different ratios are associated with different rates. For example, the ratio of k1 or less belongs to the 1 st-stage ratio range, and the charging speed is the fastest at this time, and the 1 st-stage ratio range corresponds to the largest speed. The ratio between k1 and k2 falls within a level 2 ratio range where the charging rate is next highest, the level 2 ratio range being associated with the next highest rate, and so on, until it is associated with the lowest rate.

In some embodiments, the method 200 may further comprise:

and determining the coding mode corresponding to the data transmission rate as a first coding mode used by the terminal equipment.

In other words, the terminal device may support multiple coding modes, where different coding modes are associated with different rates. Alternatively, the data transmission rate may be changed by controlling the coding scheme employed by the terminal device.

In some embodiments, the method 200 may further comprise:

and determining the code element length corresponding to the data transmission rate as the first code element length used by the terminal equipment.

In other words, the terminal device may support multiple symbol lengths, with different symbol lengths being associated with different rates. Alternatively, the change in the data transmission rate may be achieved by controlling the symbol length employed by the terminal device.

The first coding scheme is not particularly limited in the present application. Illustratively, the first encoding mode includes, but is not limited to: several common encoding algorithms are described above. Such as NRZ encoding, unipolar return-to-zero encoding, manchester encoding, miller encoding, DBP encoding, differential encoding, PIE encoding, etc.

In addition, the symbol length according to the embodiment of the present application may be one time length, that is, one time length corresponding to one symbol. Alternatively, the length corresponding to one symbol may refer to the length of a symbol for carrying 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 a baseband encoded data stream, the time length corresponding to one bit of information on the modulated subcarrier, or the time length corresponding to one bit of information on the modulated high frequency carrier. And then, as for PIE coding mode, the number of code elements used by different bit information is different; in other words, the rate of the backscatter signal is low when PIE encoding is used. Of course, in other alternative embodiments, the symbol may also be referred to as a chip, symbol, or frame, or the symbol length may also be referred to as a symbol time length, which is not specifically limited by the present application.

In some embodiments, the S210 may include:

determining a first code element length and/or a first coding mode used by the terminal equipment; the data transmission rate is determined based on the first symbol length and/or the first coding scheme.

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

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

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

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

The following describes a related scheme of determining the first symbol length and/or the first coding mode by the terminal device.

In some embodiments, second indication information is received, the second indication information being 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 coding mode.

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

In other words, the second indication information may be carried in a signal received when the terminal device completes energy harvesting or charging is completed. For example, the second indication information is carried in a trigger signal. Specifically, when the network device sends a trigger signal for triggering the terminal device to perform backscatter communication, the network device indicates the first symbol length and/or the first coding mode through the second indication information. For the terminal device, after the terminal device finishes energy collection or charging, the terminal device may acquire the second indication information from the trigger signal received for the first time, and acquire the first symbol length and/or the first coding mode indicated by the second indication information. Of course, the terminal device may also obtain the second indication information from the latest received trigger signal after the terminal device completes energy collection or charging, and obtain the first symbol length and/or the first coding mode indicated by the second indication information, which is not limited in detail in the present application.

Optionally, the second indication information is obtained in the energy collection 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 during charging. For example, the second indication information is carried in the energizing signal. In particular, 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 coding mode from the second indication information received for the first time, or the terminal device may obtain the first symbol length and/or the first coding mode from the second indication information received for the last time.

It should be noted that, in the embodiment of the present application, the term "indication" may be a direct indication, an indirect indication, or an indication having an association relationship. For example, a indicates B, which may mean that a indicates B directly, e.g., B may be obtained by a; it may also indicate that a indicates B indirectly, e.g. a indicates C, B may be obtained by C; it may also be indicated that there is an association between a and B. In combination with the scheme 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 coding scheme is determined based on a strength of a first signal measured by the terminal device.

For a first signal sent by a network device, the strength of the first signal gradually weakens as the distance between the terminal device and the network device becomes larger; meanwhile, the further away from the network device, the smaller the corresponding symbol length and/or the rate supported by the coding mode should be, i.e. the longer the first symbol length is and the first coding mode is the coding mode supporting the low rate. In this embodiment, different symbol lengths and/or coding schemes may be determined based on different signal strengths. In a specific implementation, a plurality of symbol lengths and/or a plurality of coding modes can be preset, and energy supply signals with different signal strengths are associated with different symbol lengths and/or different coding modes. Correspondingly, when receiving the first signal, the terminal device may detect the signal strength of the first signal, and determine the corresponding symbol length and/or the corresponding coding mode as the first symbol length and/or the corresponding first coding mode based on the strength of the first signal.

Optionally, the first symbol length decreases with increasing strength of the first signal.

Optionally, the first symbol length increases with decreasing strength of the first signal.

Optionally, determining a first intensity classification to which the intensity of the first signal belongs; and determining the code element length corresponding to the first intensity classification as the first code element length, and/or determining the coding mode corresponding to the first intensity classification as the first coding mode.

In other words, the strength of the first signal may be graded, with each stage corresponding to a symbol length and/or a coding scheme. For example, the signal with the strength between P1 and P2 is the first-level signal, the signal strength of which is the lowest, the first-level signal corresponds to the largest symbol length and/or supports the smallest rate coding scheme, the signal with the strength between P2 and P3 is the 2 nd-level signal, the signal strength of which is the next lowest, the 2 nd-level signal correlates to the next largest symbol length and/or supports the next smallest rate coding scheme, and so on, until the signal correlated to the smallest symbol length and/or supports the largest rate coding scheme.

Optionally, determining a first ratio of the intensity of the first signal to the intensity of the first signal when the network device sends the first signal, where the first ratio belongs to a first ratio range; and determining the code element length corresponding to the first ratio range as the first code element length, and/or determining the coding mode corresponding to the first ratio range as the first coding mode.

In other words, the ratio of the strength of the first signal received by the terminal device to the strength of the first signal when the network device sends the first signal may be different, and different symbol lengths and/or encoding manners may be associated with different ratio ranges. For example, the ratio between k1 and k2 belongs to a level 1 ratio range, which indicates that the signal strength of the first signal is the lowest, the level 1 ratio range corresponds to the coding mode with the largest symbol length and/or the smallest supported rate, the ratio between k2 and k3 is a level 2 ratio range, which indicates that the signal strength of the first signal is the next lowest, the level 2 ratio range correlates to the coding mode with the next largest symbol length and/or the smallest supported rate, and so on, until the coding mode correlated to the smallest symbol length and/or the largest supported rate.

In some embodiments, the first symbol length and/or the first coding mode is determined based on a first length of an energy harvesting time or a charging time of the terminal device.

In other words, for the energy supply signal sent by the network device, the signal strength gradually decreases as the distance becomes larger; the weaker the signal strength is, the longer the terminal device can collect energy and the charging can be completed. Meanwhile, the further away from the network device, the smaller the corresponding symbol length and/or the rate supported by the coding mode should be, i.e. the longer the first symbol length is and the first coding mode is the coding mode supporting the low symbol length and/or the coding mode. In this embodiment, different symbol lengths and/or coding schemes may be determined based on different charging time lengths. In a specific implementation, a plurality of code element lengths and/or coding modes can be preset, charging time with different lengths is associated with different code element lengths and/or different coding modes, when the terminal equipment receives an energy supply signal, energy collection can be carried out, time required for completing charging from starting energy collection is calculated, and the longer the time required for completing charging from starting energy collection is, the larger the associated code element length is and/or the smaller the rate supported by the coding modes is.

Optionally, the first symbol length increases with an increase in the first length.

Optionally, the first symbol length decreases with a decrease in the first length.

Optionally, determining a first length hierarchy to which the first length belongs; and determining the code element length corresponding to the first length grade as the first code element length, and/or determining the coding mode corresponding to the first length grade as the first coding mode.

In other words, the length of the energy harvesting time or the charging time of the terminal device may be graded, each grade corresponding to one symbol length and/or one coding scheme: for example, the length between t1 and t2 is the 1 st level length, and at this time, the charging speed is the fastest, and the 1 st level signal corresponds to the minimum symbol length and/or the coding mode supporting the maximum rate. The length between t2 and t3 is the level 2 length, where the charging speed is next highest, the level 2 length being associated with the next smallest symbol length and/or supporting the next largest rate coding, and so on, until it is associated with the largest symbol length and/or supporting the smallest rate coding.

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

In other words, the ratio may be determined according to the time for the terminal device to complete charging and a preset charging time, where different ratios relate to different symbol lengths and/or different coding modes. For example, the ratio of k1 or less belongs to a 1 st-level ratio range, and at this time, the charging speed is the fastest, where the 1 st-level ratio range corresponds to the minimum symbol length and/or the coding mode supporting the maximum rate. The ratio between k1 and k2 belongs to a level 2 ratio range, where the charging speed is next highest, the level 2 ratio range relates to the next smallest symbol length and/or the coding scheme supporting the next largest rate, and so on, until the coding scheme is associated to the largest symbol length and/or the coding scheme supporting the smallest rate.

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

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

Optionally, the data transmission rate is less than the rate used for 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 a rate corresponding to a default coding mode, or the default rate is a rate corresponding to a default code element length, or the default rate is a rate corresponding to a default coding mode and a default code element length, or the default rate is a predefined rate.

As shown in fig. 8, assuming that the rate used for the first transmission is a rate corresponding to the coding scheme 1, and a backscatter signal is transmitted based on the rate corresponding to the coding scheme 1, when a network device cannot decode the backscatter signal correctly, the terminal device retransmits the backscatter signal using the coding scheme 2. Alternatively, the coding mode 1 may be a default coding mode or a coding mode indicated by the network device. Optionally, the rate supported by the coding mode 2 is smaller than the rate supported by the coding mode 1.

As shown in fig. 8, assuming that the rate used for the first transmission is a rate corresponding to a symbol length 1, and a backscatter signal is transmitted based on the rate corresponding to the symbol length 1, when a network device cannot correctly decode the backscatter signal, the terminal device retransmits the backscatter signal using the symbol length 2. Alternatively, 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; i.e. the symbol length 2 is T2 and the symbol length 1 is T1, then T2 > T1.

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

In other words, the data transmission rate determined in S210 is a 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 last successfully transmitted the backscatter signal.

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 back-scattered signal may refer to a back-scattered signal that has been successfully transmitted before S220 is transmitted, and the last successfully transmitted back-scattered signal may be a new signal or a retransmission signal, which is not limited in particular by the present application.

In some embodiments, the S210 may include:

receiving third indication information, wherein the third indication information is used for indicating a plurality of rates or is used for indicating the terminal equipment to use a first rate pattern in at least one rate pattern, the first rate pattern comprises the plurality of rates, the plurality of rates are respectively corresponding to a plurality of transmission times, and the plurality of transmission times comprise the transmission times of the back-scattered signal;

And determining a rate corresponding to the transmission times of the backscatter signal from the plurality of rates as the data transmission rate.

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

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

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

Optionally, the third indication information is obtained in the energy collection process or the charging process.

In other words, the third indication information may be in a signal received by the intermediate terminal device during energy harvesting or during charging. For example, the third indication information is carried in the energizing signal. In particular, 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 plurality of rates or the first rate pattern from the third indication information received for the first time, or the terminal device may acquire the plurality of rates or the first rate pattern from the third indication information received for the last time.

Optionally, the plurality of transmission times is a plurality of retransmission times or the plurality of transmission times includes a transmission time other than the first transmission.

In other words, the terminal device may determine, through the third indication information, a rate to be used for the backscatter signal in a plurality of retransmission processes.

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

Based on the above scheme, different coding modes and/or different symbol lengths can be associated to different rates, and the backscattering signal can be sent through the data transmission rate determined by the terminal equipment or the data transmission rate indicated by the network equipment, for example, the rate corresponding to the first coding mode and/or the first symbol length used by the terminal equipment can be determined as the data transmission rate of the terminal equipment; in other words, the terminal device performs the back-scatter communication by rate adjustment, especially when the zero-power device transmits the back-scatter signal at the first rate, and if the network device cannot decode correctly, the zero-power device is required to transmit the back-scatter signal at the second lower rate correspondingly; or, the zero-power consumption device close to the network device can support a higher data transmission rate, and the zero-power consumption device far from the network device can support a lower data transmission rate; based on this, the performance of data transmission can be improved.

The preferred embodiments of the present application have been described in detail above with reference to the accompanying drawings, but the present application is not limited to the specific details of the above embodiments, and various simple modifications can be made to the technical solution of the present application within the scope of the technical concept of the present application, and all the simple modifications belong to the protection scope of the present application. For example, the specific features described in the above embodiments may be combined in any suitable manner, and in order to avoid unnecessary repetition, various possible combinations are not described further. As another example, any combination of the various embodiments of the present application may be made without departing from the spirit of the present application, which should also be regarded as the disclosure of the present application.

It should be further understood that, in the various method embodiments of the present application, the sequence numbers of the foregoing processes do not mean the order of execution, and the order of execution of the processes should be determined by the functions and internal logic of the processes, and should not constitute any limitation on the implementation process of the embodiments of the present application. Further, in the embodiment of the present application, the terms "downlink" and "uplink" are used to indicate a transmission direction of a signal or data, where "downlink" is used to indicate that the transmission direction of the signal or data is a first direction of a user equipment transmitted from a station to a cell, and "uplink" is used to indicate that the transmission direction of the signal or data is a second direction of a user equipment transmitted from a cell to a station, for example, "downlink signal" indicates that the transmission direction of the signal is the first direction. In addition, in the embodiment of the present application, the term "and/or" is merely an association relationship describing the association object, which means that three relationships may exist. Specifically, a and/or B may represent: a exists alone, A and B exist together, and B exists alone. In addition, the character "/" herein generally indicates that the front and rear associated objects are an "or" relationship.

The wireless communication method according to the embodiment of the present application is described in detail from the point of view of the terminal device in the above with reference to fig. 6 to 9, and the wireless communication method according to the embodiment of the present application will be described from the point of view of the network device in the below with reference to fig. 10.

Fig. 10 shows a schematic flow chart of a wireless communication method 300 according to an embodiment of the application. The method 300 may be performed by a network device, such as the network device shown in fig. 1.

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

s310, determining a data transmission rate used when the terminal equipment performs back scattering communication;

and S320, receiving a back scattering signal based on the data transmission rate.

In some embodiments, the method 300 may further comprise:

and sending first indication information, wherein the first indication information is used for indicating the data transmission rate.

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

In some embodiments, the S310 may include:

the data transmission rate is determined based on the measured intensity of the backscattered signal.

In some embodiments, the data transmission rate increases with increasing intensity of the backscattered signal; or the data transmission rate decreases with decreasing intensity of the backscattered signal.

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

In some embodiments, a third ratio of the strength of the backscattered signal to the strength of the first signal when the network device transmits the first signal is determined, the third ratio belonging to a third ratio range; and determining the rate corresponding to the third ratio range as the data transmission rate.

In some embodiments, the method 300 may further comprise:

In some embodiments, the S310 may include:

determining a first code element length and/or a first coding mode used by the terminal equipment;

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

In some embodiments, determining a rate corresponding to the first symbol length as the data transmission rate; or determining the corresponding rate of the first coding mode as the data transmission rate; or determining the first code element length and the corresponding rate of the first coding mode as the data transmission rate.

In some embodiments, the method 300 may further comprise:

and sending second indication information, wherein the second indication information is used for indicating the first code element length and/or the first coding mode.

In some embodiments, the second indication information is carried in the trigger signal and/or the energizing signal.

In some embodiments, the first symbol length and/or the first coding mode is determined based on the measured strength of the backscattered signal.

In some embodiments, the first symbol length decreases with increasing intensity of the backscattered signal; or the first symbol length increases with decreasing strength of the backscattered signal.

In some embodiments, a second intensity classification to which the intensity of the backscattered signal belongs is determined; and determining the code element length corresponding to the second intensity level as the first code element length, and/or determining the coding mode corresponding to the second intensity level as the first coding mode.

In some embodiments, a third ratio of the strength of the backscattered signal to the strength of the first signal when the network device transmits the first signal is determined, the third ratio belonging to a third ratio range; and determining the code element length corresponding to the third ratio range as the first code element length, and/or determining the coding mode corresponding to the third ratio range as the first coding mode.

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

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

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

In some embodiments, the data transmission rate is greater than the rate used when the terminal device last successfully transmitted the backscatter signal.

In some embodiments, the method 300 may further comprise:

transmitting third indication information, where the third indication information is used to indicate a plurality of rates or is used to indicate the terminal device to use a first rate pattern in at least one rate pattern, where the first rate pattern includes the plurality of rates, the plurality of rates are respectively corresponding to a plurality of transmission times, and the plurality of transmission times includes the transmission times of the backscatter signal; the data transmission rate is a rate corresponding to the number of transmissions of the backscatter signal among the plurality of rates.

In some embodiments, the plurality of transmissions is a plurality of retransmissions or the plurality of transmissions includes a number of transmissions other than the first transmission.

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

It should be understood that the steps in the method 300 may refer to corresponding steps in the method 200, and are not described herein for brevity.

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

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

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

a determining unit 410, configured to determine a data transmission rate used when the terminal device performs backscatter communication;

a transmitting unit 420 for transmitting the 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:

and when the energy collection or the charging is completed, acquiring the first indication information.

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

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

and acquiring the first indication information in the energy acquisition process or the charging process.

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

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

In some embodiments, the data transmission rate increases with an increase in the strength of the first signal; or the data transmission rate decreases with decreasing strength of the first signal.

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;

And determining the rate corresponding to the first intensity classification as the data transmission rate.

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

determining a first ratio of the intensity of the first signal to the intensity of the first signal when the network equipment sends the first signal, wherein the first ratio belongs to a first ratio range;

and determining the rate corresponding to the first ratio range as the data transmission rate.

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

In some embodiments, the data transmission rate decreases with increasing first length; or the data transmission rate increases with decreasing first length.

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

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

and determining the rate corresponding to the first length grade 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, wherein the second ratio belongs to a second ratio range;

And determining the rate corresponding to the second ratio range as 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:

determining the rate corresponding to the first code element length as the data transmission rate; or (b)

Determining the rate corresponding to the first coding mode as the data transmission rate; or (b)

And determining the first code element length and the corresponding rate of the first coding mode as the data transmission rate.

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

And receiving second indication information, wherein the second indication information is used for indicating the first code element length and/or the first coding mode.

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

and when the energy collection or the charging is completed, acquiring the second indication information.

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

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

and acquiring the second indication information in the energy acquisition process or the charging process.

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

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

and determining the first code element length and/or the first coding mode based on the strength of the first signal measured by the terminal equipment.

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

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

And determining the code element length corresponding to the first intensity classification as the first code element length, and/or determining the coding mode corresponding to the first intensity classification as the first coding mode.

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

and determining the code element length corresponding to the first ratio range as the first code element length, and/or determining the coding mode corresponding to the first ratio range as the first coding mode.

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

and determining the first code element length and/or the first coding mode based on the first length of the energy acquisition time or the charging time of the terminal equipment.

In some embodiments, the first symbol length increases with an increase in the first length; or the first symbol length decreases with decreasing first length.

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

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

And determining the code element length corresponding to the first length grade as the first code element length, and/or determining the coding mode corresponding to the first length grade as the first coding mode.

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

and determining the code element length corresponding to the second ratio range as the first code element length, and/or determining the coding mode corresponding to the second ratio range as the first coding mode.

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

It should be understood that apparatus embodiments and method embodiments may correspond with each other and that similar descriptions may refer to the method embodiments. Specifically, the terminal device 400 shown in fig. 11 may correspond to a corresponding main body in the method 200 for executing the embodiment of the present application, and the foregoing and other operations and/or functions of each unit in the terminal device 400 are respectively for implementing the corresponding flow in each method in fig. 6, which are not described herein for brevity.

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

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

a determining unit 510, configured to determine a data transmission rate used when the terminal device performs backscatter communication;

a receiving unit 520 for receiving the backscatter signal 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 backscattered signal belongs;

and determining the rate corresponding to the second intensity level as the data transmission rate.

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

determining a third ratio of the intensity of the back-scattered signal to the intensity of the first signal transmitted by the network device, wherein the third ratio belongs to a third ratio range;

and determining the rate corresponding to the third ratio range 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:

The first symbol length and/or the first coding scheme is determined based on the measured strength of the backscattered signal.

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

and determining the code element length corresponding to the second intensity level as the first code element length, and/or determining the coding mode corresponding to the second intensity level as the first coding mode.

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

and determining the code element length corresponding to the third ratio range as the first code element length, and/or determining the coding mode corresponding to the third ratio range as the first coding mode.

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

It should be understood that apparatus embodiments and method embodiments may correspond with each other and that similar descriptions may refer to the method embodiments. Specifically, the network device 500 shown in fig. 12 may correspond to a corresponding main body in performing the method 300 of the embodiment of the present application, and the foregoing and other operations and/or functions of each unit in the network device 500 are respectively for implementing the corresponding flow in each method in fig. 10, which are not described herein for brevity.

The communication device according to the embodiment of the present application is described above from the perspective of the functional module in conjunction with the accompanying drawings. It should be understood that the functional module may be implemented in hardware, or may be implemented by instructions in software, or may be implemented by a combination of hardware and software modules. Specifically, each step of the method embodiment in the embodiment of the present application may be implemented by an integrated logic circuit of hardware in a processor and/or an instruction in a software form, and the steps of the method disclosed in connection with the embodiment of the present application may be directly implemented as a hardware decoding processor or implemented by a combination of hardware and software modules in the decoding processor. Alternatively, the software modules may be located in a well-established storage medium in the art such as random access memory, flash memory, read-only memory, programmable read-only memory, electrically erasable programmable memory, registers, and the like. The storage medium is located in a memory, and the processor reads information in the memory, and in combination with hardware, performs the steps in the above method embodiments.

For example, the above-mentioned determining unit 410 and the above-mentioned determining unit 510 may each be implemented by a processor, and the above-mentioned transmitting unit 420 and receiving unit 520 may be implemented by a transceiver.

Fig. 13 is a schematic structural diagram of a communication apparatus 600 of 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 call and run a computer program from a memory to implement the methods of embodiments of the present application.

As shown in fig. 13, the communication device 600 may also include a memory 620.

The memory 620 may be used to store instruction information, and may also be used to store code, instructions, etc. for execution by the processor 610. Wherein the processor 610 may call and run a computer program from the memory 620 to implement the method in an embodiment of the application. The memory 620 may be a separate device from the processor 610 or may be integrated into the processor 610.

As shown in fig. 13, the communication device 600 may also include a transceiver 630.

The processor 610 may control the transceiver 630 to communicate with other devices, and in particular, may 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. Transceiver 630 may further include antennas, the number of which may be one or more.

It should be appreciated that the various components in the communication device 600 are connected by a bus system that includes a power bus, a control bus, and a status signal bus in addition to a data bus.

It should also be understood that the communication device 600 may be a terminal device according to an embodiment of the present application, and the communication device 600 may implement a corresponding flow implemented by the terminal device in each method according to an embodiment of the present application, that is, the communication device 600 according to an embodiment of the present application may correspond to the terminal device 400 according to an embodiment of the present application, and may correspond to a corresponding main body in performing the method 200 according to an embodiment of the present application, which is not described herein for brevity. Similarly, the communication device 600 may be a network device according to an embodiment of the present application, and the communication device 600 may implement a corresponding flow implemented by the network device in each method according to the embodiment of the present application. That is, 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 a corresponding main body in performing the method 300 in the embodiment of the present application, which is not described herein for brevity.

In addition, the embodiment of the application also provides a chip.

For example, the chip may be an integrated circuit chip having signal processing capabilities, and the methods, steps and logic blocks disclosed in the embodiments of the present application may be implemented or performed. The chip may also be referred to as a system-on-chip, a system-on-chip or a system-on-chip, etc. Alternatively, the chip may be applied to various communication devices so that the communication device mounted with the chip can perform the methods, steps and logic blocks 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 may call and run computer programs from memory to implement the methods of embodiments of the present application.

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

Wherein the processor 710 may call and run a computer program from the memory 720 to implement the method in an embodiment of the application. The memory 720 may be used for storing instruction information, and may also be used for storing code, instructions, etc. for execution by the processor 710. Memory 720 may be a separate device from processor 710 or may be integrated into processor 710.

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

The processor 710 may control the input interface 730 to communicate with other devices or chips, and in particular, may 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.

The processor 710 may control the output interface 740 to communicate with other devices or chips, and in particular, may output information or data to other devices or chips.

It should be understood that the chip 700 may be applied to the network device in the embodiment of the present application, and the chip may implement a corresponding flow implemented by the network device in each method of the embodiment of the present application, or may implement a corresponding flow implemented by the terminal device in each method of the embodiment of the present application, which is not described herein for brevity.

It should also be appreciated that the various components in the chip 700 are connected by a bus system that includes a power bus, a control bus, and a status signal bus in addition to a data bus.

The processors referred to above may include, but are not limited to:

a general purpose processor, digital signal processor (Digital Signal Processor, DSP), application specific integrated circuit (Application Specific Integrated Circuit, ASIC), field programmable gate array (Field Programmable Gate Array, FPGA) or other programmable logic device, discrete gate or transistor logic device, discrete hardware components, or the like.

The processor may be configured to implement or perform the methods, steps, and logic blocks disclosed in embodiments of the present application. The steps of the method disclosed in connection with the embodiments of the present application may be embodied directly in the execution of a hardware decoding processor, or in the execution of a combination of hardware and software modules in a decoding processor. The software modules may be located in a random access memory, flash memory, read only memory, programmable read only memory or erasable programmable memory, registers, etc. as well known in the art. The storage medium is located in a memory, and the processor reads the information in the memory and, in combination with its hardware, performs the steps of the above method.

The above references to memory include, but are not limited to:

volatile memory and/or nonvolatile memory. The nonvolatile Memory may be a Read-Only Memory (ROM), a Programmable ROM (PROM), an Erasable PROM (EPROM), an Electrically Erasable EPROM (EEPROM), or a flash Memory. The volatile memory may be random access memory (Random Access Memory, RAM) which acts as an external cache. By way of example, and not limitation, many forms of RAM are available, such as Static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double Data Rate SDRAM (Double Data Rate SDRAM), enhanced SDRAM (ESDRAM), synchronous Link DRAM (SLDRAM), and Direct memory bus RAM (DR RAM).

It should be noted that the memory described herein is intended to comprise these and any other suitable types of memory.

There is also provided in an embodiment of the present application a computer-readable storage medium storing a computer program. The computer readable storage medium stores one or more programs, the one or more programs comprising instructions, which when executed by a portable electronic device comprising a plurality of application programs, enable the portable electronic device to perform the wireless communication method provided by the present application. Optionally, the computer readable storage medium may be applied to a network device in the embodiment of the present application, and the computer program causes a computer to execute a corresponding flow implemented by the network device in each method in the embodiment of the present application, which is not described herein for brevity. Optionally, the computer readable storage medium may be applied to a mobile terminal/terminal device in the embodiment of the present application, and the computer program causes a computer to execute a corresponding procedure implemented by the mobile terminal/terminal device in each method of the embodiment of the present application, which is not described herein for brevity.

A computer program product, including a computer program, is also provided in an embodiment of the present application. Optionally, the computer program product may be applied to a network device in the embodiment of the present application, and the computer program causes a computer to execute a corresponding flow implemented by the network device in each method in the embodiment of the present application, which is not described herein for brevity. Optionally, the computer program product may be applied to a mobile terminal/terminal device in the embodiment of the present application, and the computer program makes a computer execute corresponding processes implemented by the mobile terminal/terminal device in each method of the embodiment of the present application, which are not described herein for brevity.

The embodiment of the application also provides a computer program. The computer program, when executed by a computer, enables the computer to perform the wireless communication method provided by the present application. Optionally, the computer program may be applied to a network device in the embodiment of the present application, and when the computer program runs on a computer, the computer is caused to execute a corresponding flow implemented by the network device in each method in the embodiment of the present application, which is not described herein for brevity. Optionally, the computer program may be applied to a mobile terminal/terminal device in the embodiment of the present application, and when the computer program runs on a computer, the computer is caused to execute corresponding processes implemented by the mobile terminal/terminal device in each method in the embodiment of the present application, which is not described herein for brevity.

The embodiment of the present application further provides a communication system, which may include the above-mentioned terminal device and network device, so as to form a communication system 100 as shown in fig. 1, which is not described herein for brevity. It should be noted that the term "system" and the like herein may also be referred to as "network management architecture" or "network system" and the like.

It is also to be understood that the terminology used in the embodiments of the present application and the appended claims is for the purpose of describing particular embodiments only, and is not intended to be limiting of the embodiments of the present application. For example, as used in the embodiments of the application and the appended claims, the singular forms "a," "an," "the," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.

Those of skill in the art will appreciate that the elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the embodiments of the present application. If implemented as a software functional unit and sold or used as a stand-alone product, may be stored on a computer readable storage medium. Based on such understanding, the technical solution of the embodiments of the present application may be embodied in essence or a part contributing to the prior art or a part of the technical solution, in the form of a software product stored in a storage medium, including several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method of the embodiments of the present application. And the aforementioned storage medium includes: various media capable of storing program codes, such as a U disk, a mobile hard disk, a read-only memory, a random access memory, a magnetic disk or an optical disk.

Those skilled in the art will further appreciate that, for convenience and brevity, specific working procedures of the above-described system, apparatus and unit may refer to corresponding procedures in the foregoing method embodiments, and are not repeated herein. In the several embodiments provided by the present application, it should be understood that the disclosed systems, devices, and methods may be implemented in other manners. For example, the division of units or modules or components in the above-described apparatus embodiments is merely a logic function division, and there may be another division manner in actual implementation, for example, multiple units or modules or components may be combined or may be integrated into another system, or some units or modules or components may be omitted or not performed. As another example, the units/modules/components described above as separate/display components may or may not be physically separate, i.e., may be located in one place, or may be distributed over multiple network elements. Some or all of the units/modules/components may be selected according to actual needs to achieve the objectives of the embodiments of the present application. Finally, it is pointed out that the coupling or direct coupling or communication connection between the various elements shown or discussed above can be an indirect coupling or communication connection via interfaces, devices or elements, which can be in electrical, mechanical or other forms.

The foregoing is merely a specific implementation of the embodiment of the present application, but the protection scope of the embodiment of the present application is not limited thereto, and any person skilled in the art can easily think about changes or substitutions within the technical scope of the embodiment of the present application, and the changes or substitutions are covered by the protection scope of the embodiment of the present application. Therefore, the protection scope of the embodiments of the present application shall be subject to the protection scope of the claims.

Claims

A method of wireless communication, comprising:

determining a data transmission rate used when the terminal equipment performs backscatter communication;

and transmitting a backscatter signal based on the data transmission rate.
The method according to claim 1, wherein the method further comprises:

and receiving first indication information, wherein the first indication information is used for indicating the data transmission rate.
The method of claim 2, wherein the receiving the first indication information comprises:

and when the energy collection or the charging is completed, acquiring the first indication information.
A method according to claim 2 or 3, characterized in that the first indication information is carried in a trigger signal.
The method of claim 2, wherein the receiving the first indication information comprises:

and acquiring the first indication information in the energy acquisition process or the charging process.
The method according to claim 2 or 5, wherein the first indication information is carried in an energizing signal.
The method of claim 1, wherein determining a data transmission rate used by the terminal device for backscatter communications comprises:

the data transmission rate is determined based on the strength of the first signal measured by the terminal device.
The method of 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 decreasing strength of the first signal.
The method according to claim 7 or 8, wherein said determining the data transmission rate based on the strength of the first signal measured by the terminal device comprises:

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

and determining the rate corresponding to the first intensity classification as the data transmission rate.
The method according to any of claims 7 to 9, wherein said determining the data transmission rate based on the strength of the first signal measured by the terminal device comprises:

determining a first ratio of the intensity of the first signal to the intensity of the first signal when the network equipment sends the first signal, wherein the first ratio belongs to a first ratio range;

and determining the rate corresponding to the first ratio range as the data transmission rate.
The method of claim 1, wherein determining a data transmission rate used by the terminal device for backscatter communications comprises:

the data transmission rate is determined based on a first length of an energy harvesting time or a charging time of the terminal device.
The method of claim 11, wherein the data transmission rate decreases with increasing first length; or the data transmission rate increases with decreasing first length.
The method according to claim 11 or 12, wherein the determining the data transmission rate based on the first length of the energy harvesting time or the charging time of the terminal device comprises:

Determining a first length grade to which the first length belongs;

and determining the rate corresponding to the first length grade as the data transmission rate.
The method according to any of claims 11 to 13, wherein the determining the data transmission rate based on the first length of the energy harvesting time or the charging time of the terminal device comprises:

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

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

and determining the coding mode corresponding to the data transmission rate as a first coding mode used by the terminal equipment.
The method according to any one of claims 1 to 15, further comprising:

and determining the code element length corresponding to the data transmission rate as the first code element length used by the terminal equipment.
The method of claim 1, wherein determining a data transmission rate used by the terminal device for backscatter communications comprises:

Determining a first code element length and/or a first coding mode used by the terminal equipment;

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

determining the rate corresponding to the first code element length as the data transmission rate; or (b)

Determining the rate corresponding to the first coding mode as the data transmission rate; or (b)

And determining the first code element length and the corresponding rate of the first coding mode as the data transmission rate.
The method according to claim 17 or 18, characterized in that the method further comprises:

and receiving second indication information, wherein the second indication information is used for indicating the first code element length and/or the first coding mode.
The method of claim 19, wherein the receiving the second indication information comprises:

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

and acquiring the second indication information in the energy acquisition process or the charging process.
The method of claim 19 or 22, wherein the second indication information is carried in an energizing signal.
The method according to claim 17 or 18, wherein said determining the first symbol length and/or the first coding scheme used by the terminal device comprises:

and determining the first code element length and/or the first coding mode based on the strength of the first signal measured by the terminal equipment.
The method of claim 24, wherein the first symbol length decreases as the strength of the first signal increases; or the first symbol length increases with decreasing strength of the first signal.
The method according to claim 24 or 25, wherein said determining the first symbol length and/or the first coding scheme based on the strength of the first signal measured by the terminal device comprises:

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

And determining the code element length corresponding to the first intensity classification as the first code element length, and/or determining the coding mode corresponding to the first intensity classification as the first coding mode.
The method according to any of the claims 24 to 25, wherein said determining the first symbol length and/or the first coding scheme based on the strength of the first signal measured by the terminal device comprises:

determining a first ratio of the intensity of the first signal to the intensity of the first signal when the network equipment sends the first signal, wherein the first ratio belongs to a first ratio range;

and determining the code element length corresponding to the first ratio range as the first code element length, and/or determining the coding mode corresponding to the first ratio range as the first coding mode.
The method according to claim 17 or 18, wherein said determining the first symbol length and/or the first coding scheme used by the terminal device comprises:

and determining the first code element length and/or the first coding mode based on the first length of the energy acquisition time or the charging time of the terminal equipment.
The method of claim 28, wherein the first symbol length increases as the first length increases; or the first symbol length decreases with decreasing first length.
The method according to claim 28 or 29, wherein said determining the first symbol length and/or the first coding scheme based on a first length of an energy harvesting time or a charging time of a terminal device comprises:

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

and determining the code element length corresponding to the first length grade as the first code element length, and/or determining the coding mode corresponding to the first length grade as the first coding mode.
The method according to any of the claims 28 to 30, wherein said determining the first symbol length and/or the first coding scheme based on a first length of an energy harvesting time or a charging time of a terminal device comprises:

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

and determining the code element length corresponding to the second ratio range as the first code element length, and/or determining the coding mode corresponding to the second ratio range as the first coding mode.
A method according to any of claims 1 to 31, wherein the data transmission rate is the rate used when the first transmission for the backscatter signal fails and the terminal device resends the backscatter signal.
The method of claim 32, wherein the data transmission rate is less than a rate used for the first transmission.
The method of claim 32 wherein the rate used for the first transmission is a default rate.
The method of claim 34, wherein the default rate is a rate corresponding to a default coding scheme, or wherein the default rate is a rate corresponding to a default symbol length, or wherein the default rate is a rate corresponding to a default coding scheme and a default symbol length, or wherein the default rate is a predefined rate.
A method according to any one of claims 1 to 31, wherein the data transmission rate is the rate at which the terminal device first transmits the backscatter signal.
The method of claim 36, wherein the data transmission rate is greater than a rate used by the terminal device when the backscatter signal was last successfully transmitted.
The method of claim 1, wherein determining a data transmission rate used by the terminal device for backscatter communications comprises:

receiving third indication information, wherein the third indication information is used for indicating a plurality of rates or is used for indicating the terminal equipment to use a first rate pattern in at least one rate pattern, the first rate pattern comprises the plurality of rates, the plurality of rates are respectively corresponding to a plurality of transmission times, and the plurality of transmission times comprise the transmission times of the back-scattered signal;

And determining a rate corresponding to the transmission times of the backscatter signal from the plurality of rates as the data transmission rate.
The method of claim 38, wherein the plurality of transmissions is a plurality of retransmissions or the plurality of transmissions comprises a number of transmissions other than a first transmission.
The method of claim 38, wherein the rate used by the terminal device is a default rate for the first transmission of the backscatter signal.
The method of claim 40, wherein the default rate is a rate corresponding to a default coding scheme, or wherein the default rate is a rate corresponding to a default symbol length, or wherein the default rate is a rate corresponding to a default coding scheme and a default symbol length, or wherein the default rate is a predefined rate.
A method of wireless communication, comprising:

determining a data transmission rate used when the terminal equipment performs backscatter communication;

a backscatter signal is received based on the data transmission rate.
The method of claim 42, further comprising:

And sending first indication information, wherein the first indication information is used for indicating the data transmission rate.
The method of claim 43, wherein the first indication information is carried in a trigger signal and/or an energizing signal.
The method of claim 42, wherein determining the data transmission rate used by the terminal device for backscatter communications comprises:

the data transmission rate is determined based on the measured intensity of the backscattered signal.
The method of claim 45, wherein the data transmission rate increases with an increase in the strength of the backscattered signal; or the data transmission rate decreases with decreasing intensity of the backscattered signal.
The method of claim 45 or 46, wherein said determining said data transmission rate based on measured intensities of said backscattered signals comprises:

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

and determining the rate corresponding to the second intensity level as the data transmission rate.
The method of any one of claims 45 to 47, wherein the determining the data transmission rate based on the measured intensity of the backscattered signal comprises:

Determining a third ratio of the intensity of the back-scattered signal to the intensity of the first signal transmitted by the network device, wherein the third ratio belongs to a third ratio range;

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

and determining the coding mode corresponding to the data transmission rate as a first coding mode used by the terminal equipment.
The method of any one of claims 42 to 48, further comprising:

and determining the code element length corresponding to the data transmission rate as the first code element length used by the terminal equipment.
The method of claim 42, wherein determining the data transmission rate used by the terminal device for backscatter communications comprises:

determining a first code element length and/or a first coding mode used by the terminal equipment;

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

Determining the rate corresponding to the first code element length as the data transmission rate; or (b)

Determining the rate corresponding to the first coding mode as the data transmission rate; or (b)

And determining the first code element length and the corresponding rate of the first coding mode as the data transmission rate.
The method of claim 51 or 52, further comprising:

and sending second indication information, wherein the second indication information is used for indicating the first code element length and/or the first coding mode.
The method of claim 53, wherein the second indication information is carried in a trigger signal and/or an energizing signal.
The method according to claim 51 or 52, wherein said determining the first symbol length and/or the first coding scheme used by the terminal device comprises:

the first symbol length and/or the first coding scheme is determined based on the measured strength of the backscattered signal.
The method of claim 55, wherein the first symbol length decreases as the strength of the backscattered signal increases; or the first symbol length increases with decreasing strength of the backscattered signal.
The method of claim 55 or 56, wherein the determining the first symbol length and/or the first coding mode based on the measured strength of the backscattered signal comprises:

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

and determining the code element length corresponding to the second intensity level as the first code element length, and/or determining the coding mode corresponding to the second intensity level as the first coding mode.
The method according to any one of claims 55 to 57, wherein said determining said first symbol length and/or said first coding scheme based on measured intensities of said backscattered signals comprises:

determining a third ratio of the intensity of the back-scattered signal to the intensity of the first signal transmitted by the network device, wherein the third ratio belongs to a third ratio range;

and determining the code element length corresponding to the third ratio range as the first code element length, and/or determining the coding mode corresponding to the third ratio range as the first coding mode.
A method as claimed in any one of claims 42 to 58, wherein the data transmission rate is the rate used when the first transmission for the backscatter signal fails and the terminal device resends the backscatter signal.
The method of claim 59, wherein the data transmission rate is less than a rate used for the first transmission.
The method of claim 60, wherein the rate used for the first transmission is a default rate.
The method of claim 61, wherein the default rate is a rate corresponding to a default coding scheme, or wherein the default rate is a rate corresponding to a default symbol length, or wherein the default rate is a rate corresponding to a default coding scheme and a default symbol length, or wherein the default rate is a predefined rate.
A method as claimed in any one of claims 42 to 58, wherein the data transmission rate is the rate at which the terminal device first transmits the backscatter signal.
The method of claim 63, wherein the data transmission rate is greater than a rate used when the terminal device last successfully transmitted a backscatter signal.
The method of claim 42, further comprising:

transmitting third indication information, where the third indication information is used to indicate a plurality of rates or is used to indicate the terminal device to use a first rate pattern in at least one rate pattern, where the first rate pattern includes the plurality of rates, the plurality of rates are respectively corresponding to a plurality of transmission times, and the plurality of transmission times includes the transmission times of the backscatter signal; the data transmission rate is a rate corresponding to the number of transmissions of the backscatter signal among the plurality of rates.
The method of claim 65, wherein the plurality of transmissions is a plurality of retransmissions or the plurality of transmissions comprises a number of transmissions other than a first transmission.
The method of claim 65, wherein the rate used by the terminal device for the first transmission of the backscatter signal is a default rate.
The method of claim 67, wherein said default rate is a rate corresponding to a default coding mode, or wherein said default rate is a rate corresponding to a default symbol length, or wherein said default rate is a rate corresponding to a default coding mode and a default symbol length, or wherein said default rate is a predefined rate.
A terminal device, comprising:

a determining unit for determining a data transmission rate used when the terminal device performs the backscatter communication;

and a transmitting unit for transmitting the backscatter signal based on the data transmission rate.
A network device, comprising:

a determining unit for determining a data transmission rate used when the terminal device performs the backscatter communication;

and a receiving unit for receiving the backscatter signal based on the data transmission rate.
A terminal device, comprising:

a processor and a memory for storing a computer program, the processor being for invoking and running the computer program stored in the memory to perform the method of any of claims 1 to 41.
A network device, comprising:

a processor and a memory for storing a computer program, the processor for invoking and running the computer program stored in the memory to perform the method of any of claims 42 to 68.
A chip, comprising:

a processor for calling and running a computer program from memory, causing a device on which the chip is mounted to perform the method of any one of claims 1 to 41 or the method of any one of claims 42 to 68.
A computer-readable storage medium storing a computer program for causing a computer to perform the method of any one of claims 1 to 41 or the method of any one of claims 42 to 68.
A computer program product comprising computer program instructions for causing a computer to perform the method of any one of claims 1 to 41 or the method of any one of claims 42 to 68.
A computer program, characterized in that it causes a computer to perform the method according to any one of claims 1 to 41 or the method according to any one of claims 42 to 68.