CN117178614A

CN117178614A - Wireless communication method, terminal device and network device

Info

Publication number: CN117178614A
Application number: CN202180097184.6A
Authority: CN
Inventors: 崔胜江; 贺传峰; 胡荣贻
Original assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Current assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority date: 2021-07-08
Filing date: 2021-07-08
Publication date: 2023-12-05
Also published as: WO2023279335A1

Abstract

The embodiment of the application provides a wireless communication method, terminal equipment and network equipment, wherein the method comprises the following steps: acquiring a first Timing Advance (TA) value of terminal equipment; and transmitting a back scattering signal based on the first TA value. In the application, the backward scattering signal is sent based on the first TA value, namely the uplink frame is sent in advance, so that the uplink frame where the backward scattering signal received by the downlink frame and the network equipment is positioned is aligned in time, and further, the zero-power consumption terminal can be applied to the cellular Internet of things to enrich the types and the quantity of the link terminals in the network, and further, the universal interconnection can be truly realized.

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 the existing zero-power-consumption terminal, such as wireless radio frequency identification (Radio Frequency Identification, RFID) technology, 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 and further truly realize the internet of everything.

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

acquiring a first Timing Advance (TA) value of terminal equipment;

and transmitting a back scattering signal based on the first TA value.

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

and sending first indication information, wherein a TA value indicated by the first indication information is used for determining the first TA value by the terminal equipment, and the first TA value is used for sending a back scattering signal by the terminal equipment.

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 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 above technical scheme, the uplink frame is sent in advance based on the first TA value, so that the uplink frame where the downlink frame and the uplink frame where the uplink frame is received by the network equipment is located are aligned in time, and further, the zero-power-consumption terminal can be applied to the cellular internet of things so as to enrich the types and the number of the link terminals in the network, and further, the internet of everything can be truly realized.

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 according to 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 according to an embodiment of the present application.

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

Fig. 7 is another schematic block diagram of a wireless communication method provided by an embodiment of the present application.

Fig. 8 is a schematic block diagram of a terminal device provided in an embodiment of the present application.

Fig. 9 is a schematic block diagram of a network device provided by an embodiment of the present application.

Fig. 10 is another schematic block diagram of a communication device provided by an embodiment of the present application.

Fig. 11 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).

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.

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.

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 and further realize the real internet of everything.

Fig. 6 shows a schematic flow chart of a wireless communication method 200 according to an embodiment of the application, which 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 some or all of the following:

s210, acquiring a first Timing Advance (TA) of the terminal equipment.

And S220, transmitting a back scattering signal based on the first TA value.

In other words, the terminal device may adjust the transmission time of the backscatter signal based on the first TA value. For example, the terminal device needs to advance the uplink frame where the backscatter signal is located by the first TA value than the corresponding downlink frame.

In cellular networks, since the zero-power terminals are not battery-powered, it is necessary to provide an energizing signal through the network device for the zero-power devices to obtain energy, thereby performing a corresponding communication procedure. Specifically, after the zero-power consumption device collects energy, a trigger signal sent by the network device needs to be monitored, and the trigger signal is used for scheduling the zero-power consumption device to perform backscatter communication and contains necessary scheduling and indication information. The zero power device then performs a time advanced transmission of the backscatter signal based on one TA value (i.e. the first TA value).

The energy supply signal for supplying energy and the trigger signal for transmitting information can be two signals or one signal, and the application is not limited in particular. For example, from the perspective of RFID technology, the power signal and the trigger signal are one signal, whereas from the perspective of cellular passive internet of things, the power signal and the trigger signal are two independent signals, which may not be transmitted in one frequency band; for example, the network device continuously or intermittently transmits energy supply signals in a certain frequency band, the zero-power consumption device performs energy collection, and after the zero-power consumption device obtains energy, a corresponding communication process can be performed; such as measurement, reception of channels/signals, transmission of channels/signals, etc.

In this embodiment, the uplink frame is sent based on the first TA value, that is, the uplink frame is sent in advance, so that the uplink frames where the downlink frame and the uplink frame where the uplink frame is received by the network device is located are aligned in time, and further, the zero-power consumption terminal can be applied to the cellular internet of things, so as to enrich the types and the number of the link terminals in the network, and further, the universal interconnection can be truly realized.

In some embodiments, the S210 may include:

acquiring first indication information;

and determining the first TA value based on the TA value indicated by the first indication information.

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. Alternatively, a may be the first indication information related to the present application, and B may be a TA value indicated by the first indication information.

In some implementations, the first TA value is a TA value selected from a plurality of preset TA values.

In other words, the TA value indicated by the first indication information is a TA value selected from a plurality of preset TA values. Or, the network device indicates, through the sent first indication information, which one of the multiple preset TA values is used by the terminal device, from among the multiple preset TA values preset in advance.

In some implementations, the TA value indicated by the first indication information is stored or the stored TA value is updated with the TA value indicated by the first indication information; and when the energy collection or the charging is completed, determining the latest stored TA as the first TA value.

Optionally, the first indication information is obtained in a process of collecting or charging energy of the terminal device.

Optionally, the first indication information is carried in an energizing signal.

In other words, the first indication information in the energy supply signal is acquired in the process of energy collection or charging of the terminal device.

As an example, the first indication information may be carried by an energizing signal, where the first indication information is used to indicate a TA value. In a specific implementation, the network device may perform corresponding encoding and modulation on the TA value indicated by the first indication information, so as to obtain the energy supply signal. For example, the radio frequency carrier wave is modulated by using the encoded first indication information to obtain a modulated signal (namely the energy supply signal), and the energy supply signal is sent to a zero-power consumption terminal, and accordingly, when the terminal equipment receives the energy supply signal to perform energy collection, the terminal equipment can demodulate and decode the carried first indication information, so that the energy supply signal can carry the first indication information while supplying energy to the zero-power consumption terminal.

The energy supply signal may be a wireless radio frequency carrier signal, and the network device modulates a radio frequency carrier to carry the first indication information. Common modulation schemes include, but are not limited to: amplitude keying ASK, frequency shift keying FSK, phase shift keying PSK, etc. Wherein ASK includes, but is not limited to: double-sideband amplitude shift keying (DSB-ASK), single-sideband amplitude shift keying (SSB-ASK), or phase-reversal amplitude shift keying, PR-ASK. The signal encoding may be by pulse-interval encoding (PIE) or other encoding, such as described above.

In some implementations, the TA value indicated by the first indication information is determined to be the first TA value.

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

Optionally, the first indication information is carried in a trigger signal.

In other words, when the energy collection or the charging is completed, the first indication information in the trigger signal is acquired.

As an example, the first indication information may be carried by a trigger signal, where the first indication information is used to indicate a TA value. In a specific implementation, the network device may perform corresponding encoding and modulation on the TA value indicated by the first indication information to obtain the trigger signal. For example, the radio frequency carrier wave is modulated by using the encoded first indication information to obtain a modulated signal (i.e. the trigger signal), and the trigger signal is sent to a zero-power-consumption terminal, so as to schedule or trigger the zero-power-consumption terminal to perform data transmission and carry the first indication information. Correspondingly, the terminal equipment performs corresponding data transmission after receiving the trigger signal utilization code.

The triggering signal may be a radio frequency carrier signal, and the network device modulates a radio frequency carrier to carry the first indication information. Common modulation schemes include, but are not limited to: amplitude keying ASK, frequency shift keying FSK, phase shift keying PSK, etc. Wherein ASK includes, but is not limited to: double-sideband amplitude shift keying (DSB-ASK), single-sideband amplitude shift keying (SSB-ASK), or phase-reversal amplitude shift keying, PR-ASK. The signal encoding may be by pulse-interval encoding (PIE) or other encoding, such as described above. Modulating a radio frequency carrier wave by using the encoded first indication information to obtain a modulated signal (namely the trigger signal), and sending the trigger signal to a zero-power-consumption terminal so as to schedule or trigger the zero-power-consumption terminal to carry the first indication information while carrying out data transmission.

In some implementations, the first indication information is periodically or aperiodically transmitted information.

Optionally, the sending period of the first indication information is preset.

Optionally, the transmission period of the first indication information is a period selected from a plurality of preset periods.

In some implementations, the first indication information is carried on a plurality of time units, and the first indication information carried on the plurality of time units is used for indicating a plurality of TA values respectively.

As an example, the plurality of TA values carried by the energizing signal are transmitted over a plurality of time units, respectively. When the plurality of TA values are the same, the terminal equipment acquires the first indication information in the process of energy acquisition, and can determine the first TA value according to any one of the acquired TA values indicated by the first indication information; for example, determining the TA value indicated by any one of the first indication information as the first TA value. When the plurality of TA values are different, the terminal equipment acquires the first indication information in the process of energy acquisition, and stores the TA value indicated by the first indication information or updates the stored TA value by using the TA value indicated by the first indication information; further, when energy harvesting or charging is completed, the latest stored TA is determined to be the first TA value.

Optionally, the first indication information is carried in a trigger signal.

As an example, a plurality of trigger signals carrying the plurality of TA values are transmitted over a plurality of time units, respectively. When the plurality of TA values are the same, the terminal equipment acquires the trigger signal when the energy acquisition or the charging is completed, and can determine the first TA value according to the TA value indicated by the first indication information; for example, the TA value indicated by the first indication information is determined as the first TA value. When the plurality of TA values are different, the terminal equipment acquires the trigger signal when the energy acquisition or the charging is completed, and can determine the first TA value according to the TA value indicated by the first indication information; for example, determining the TA value indicated by the first indication information as the first TA value; in this case, the time of the trigger signal acquired by different terminal apparatuses may be different, and further, the TA value acquired by different terminal apparatuses may be different.

Optionally, the plurality of TA values are different, partially identical or identical to each other.

As an example, when the multiple TA values carried by the power supply signal are respectively transmitted on multiple time units, the multiple TA values are different, partially identical or identical.

As another example, when a plurality of trigger signals carrying the plurality of TA values are transmitted on a plurality of time units, respectively, the plurality of TA values are different from each other, are partially the same or are the same.

Optionally, the plurality of TA values are ordered in order from small to large or from large to small in the time domain.

In other words, the TA value carried by the energizing signal is greater or lesser over the plurality of time units.

Optionally, the plurality of TA values are uniformly distributed in the time domain.

In other words, the different TA values may be evenly distributed over the plurality of time units. As an example, the TA value carried in the energizing signal or the triggering signal may include TA1, TA2, TA3, … in the time domain; in other words, each TA value is transmitted over the same number of time units.

Optionally, the plurality of TA values are unevenly distributed in the time domain.

In other words, the distribution of different TA values may be non-uniform over the plurality of time units. As an example, the TA value carried in the energizing signal or the triggering signal may include TA1, TA2, TA3, … in the time domain. In other words, the number of time units transmitted per TA value is not exactly the same.

In some implementations, the first indication information is a number of preambles in an energy supply signal, and if the number of preambles in the energy supply signal is a first value, the first indication information is used for indicating that the first TA value is a TA value corresponding to the first value.

In other words, the terminal device may determine, based on at least one value and a TA value corresponding to each value, a TA value corresponding to the first value as the first TA value, where the at least one value includes the first value. It should be understood that the present application is not limited to the value range of the at least one numerical value.

In some embodiments, the S210 may include:

the first TA value 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 larger the corresponding TA value should be. In this embodiment, different TA values may be determined based on different signal strengths. In a specific implementation, a plurality of TA values may be preset, and different TA values may be associated with energy supply signals with different signal strengths. Correspondingly, when receiving the first signal, the terminal device may detect the signal strength of the first signal, and determine the corresponding TA value as the first TA value based on the strength of the first signal.

The first signal according to the present application may be an energy supply signal or a trigger signal, which is not particularly limited in the present application.

Optionally, the first TA value decreases with increasing strength of the first signal; or the first TA value increases with decreasing strength of the first signal.

Optionally, a first intensity classification based on which intensity of the first signal belongs; and determining a TA value corresponding to the first intensity classification as the first TA value based on a first mapping relation, wherein the first mapping relation comprises at least one intensity classification and the TA value corresponding to each intensity classification, and the at least one intensity classification comprises the first intensity classification.

In other words, the strength of the first signal may be graded, with each grade corresponding to one TA value. For example, a signal with an intensity between P1 and P2 is a first-order signal with the lowest signal intensity, the first-order signal corresponding to the largest TA value, a signal with an intensity between P2 and P3 is a second-order signal with the next lowest signal intensity, the second-order signal is associated with the next largest TA value, and so on until it is associated with the smallest TA value.

Optionally, determining a first ratio of the strength of the first signal to the strength of the network device when transmitting the first signal; and determining a TA value corresponding to a first ratio range to which the first ratio belongs as the first TA value based on a second mapping relation, wherein the second mapping relation comprises at least one ratio range and TA values corresponding to each ratio range, and the at least one ratio range comprises the first ratio range.

In other words, the different TA values 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 when the network device sends the first signal. For example, the ratio between k1 and k2 belongs to a level 1 ratio range, the signal strength of the first signal is lowest, the level 1 ratio range corresponds to the largest TA value, the ratio between k2 and k3 is a level 2 ratio range, the signal strength of the first signal is next lowest, the level 2 ratio range correlates to the next largest TA value, and so on, until it is correlated to the smallest TA value.

In some embodiments, the S210 may include:

the first TA value is determined based on a first length of an energy harvesting time or a charging time of the terminal device.

Aiming at energy supply signals sent by network equipment, the signal strength is gradually weakened along with the increase of the distance; 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 larger the corresponding TA value should be. In this embodiment, different TA values may be determined based on different lengths of charging time. In a specific implementation, a plurality of TA values may be preset, and charging times of different lengths are associated with different TA values, and when the terminal device receives the energy supply signal, the terminal device may perform energy collection, calculate the time required from starting energy collection to completing charging, and the longer the time required from starting energy collection to completing charging, the larger the associated TA value.

Optionally, the first TA value increases with an increase in the first length; or the first TA value decreases with decreasing first length.

Optionally, grading based on a first length to which the first length belongs; and determining the TA value corresponding to the first length grade as the first TA value based on a third mapping relation, wherein the third mapping relation comprises at least one length grade and the TA value corresponding to each length grade, and the at least one length grade comprises the first length grade.

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 TA value: for example, the length between t1 and t2 is the 1 st stage length, and the charging speed is the fastest, and the 1 st stage signal corresponds to the smallest TA value. 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 smallest TA value, and so on, until it is associated with the smallest TA value.

Optionally, determining a second ratio of the first length to a preset length; and determining a TA value corresponding to a second ratio range to which the second ratio belongs as the first TA value based on a fourth mapping relation, wherein the fourth mapping relation comprises at least one ratio range and TA values corresponding to each ratio range, and the at least one ratio range comprises the second ratio range.

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 TA values. For example, the ratio of k1 or less belongs to the 1 st-level ratio range, and the charging speed is the fastest, and the 1 st-level ratio range corresponds to the smallest TA value. 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 smallest TA value, and so on, until it is associated with the smallest TA value.

In some embodiments, the first TA value is preset.

In other words, all terminal apparatuses perform advanced transmission of the backscatter communication based on one fixed TA value.

Based on the above scheme, the first TA value adopted when the terminal device is used for sending the backscatter signal can be determined through the TA value indicated by the first indication information, the TA value determined based on the strength of the first signal, the TA value determined based on the first length or a preset TA value, a TA value determining mechanism applying the zero-power consumption technology under the cellular system is provided, and based on the TA value determining mechanism, the zero-power consumption device can perform time advance of backscatter communication through the first TA value determined by the technical scheme, so that the technical problem that the backscatter information sent by the zero-power consumption device in an uplink frame in the cellular system is aligned with a downlink frame at the network device side can be solved.

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 perspective of the terminal device in the above with reference to fig. 6, and the wireless communication method according to the embodiment of the present application will be described from the perspective of the network device in the below with reference to fig. 7.

Fig. 7 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. 7, the method 300 may include:

s310, first indication information is sent, a TA value indicated by the first indication information is used for determining the first TA value by a terminal device, and the first TA value is used for sending a back scattering signal by the terminal device.

In some embodiments, the first TA value is a TA value selected from a plurality of preset TA values.

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

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

In some embodiments, the first indication information is periodically or aperiodically transmitted information.

In some embodiments, the transmission period of the first indication information is preset.

In some embodiments, the transmission period of the first indication information is a period selected from a plurality of preset periods.

In some embodiments, the first indication information is carried on a plurality of time units, and the first indication information carried on the plurality of time units is used for indicating a plurality of TA values respectively.

In some embodiments, the plurality of TA values are different, partially identical, or identical to each other.

In some embodiments, the plurality of TA values are ordered in the time domain in order from small to large or from large to small; or the plurality of TA values are uniformly distributed in the time domain; or the plurality of TA values are unevenly distributed in the time domain.

In some embodiments, the first indication information is a number of preambles in an energy supply signal, and if the number of preambles in the energy supply signal is a first value, the first indication information is used to indicate that the first TA value is a TA value corresponding to the first value.

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 7, and the apparatus embodiment of the present application is described in detail below with reference to fig. 8 to 11.

Fig. 8 is a schematic block diagram of a terminal device 400 of an embodiment of the present application.

As shown in fig. 8, the terminal device 400 may include:

An obtaining unit 410, configured to obtain a first timing advance TA value of a terminal device;

a transmitting unit 420, configured to transmit a backscatter signal based on the first TA value.

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

acquiring first indication information;

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

storing the TA value indicated by the first indication information or updating the stored TA value by using the TA value indicated by the first indication information;

and when the energy collection or the charging is completed, determining the latest stored TA as the first TA value.

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

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

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

and determining the TA value indicated by the first indication information as the first TA value.

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

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

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

a first intensity classification based on the intensity of the first signal;

and determining a TA value corresponding to the first intensity classification as the first TA value based on a first mapping relation, wherein the first mapping relation comprises at least one intensity classification and the TA value corresponding to each intensity classification, and the at least one intensity classification comprises the first intensity classification.

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

determining a first ratio of the strength of the first signal to the strength of the network device when the first signal is transmitted;

and determining a TA value corresponding to a first ratio range to which the first ratio belongs as the first TA value based on a second mapping relation, wherein the second mapping relation comprises at least one ratio range and TA values corresponding to each ratio range, and the at least one ratio range comprises the first ratio range.

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

In some embodiments, the first TA value increases with increasing first length; or the first TA value decreases with decreasing first length.

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

a first length hierarchy based on which the first length belongs;

and determining the TA value corresponding to the first length grade as the first TA value based on a third mapping relation, wherein the third mapping relation comprises at least one length grade and the TA value corresponding to each length grade, and the at least one length grade comprises the first length grade.

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

determining a second ratio of the first length to a preset length;

and determining a TA value corresponding to a second ratio range to which the second ratio belongs as the first TA value based on a fourth mapping relation, wherein the fourth mapping relation comprises at least one ratio range and TA values corresponding to each ratio range, and the at least one ratio range comprises the second ratio range.

In some embodiments, the first TA value is preset.

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. 8 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. 9 is a schematic block diagram of a network device 500 of an embodiment of the present application.

As shown in fig. 9, the network device 500 may include:

a sending unit 510, configured to send first indication information, where a TA value indicated by the first indication information is used for a terminal device to determine the first TA value, and the first TA value is used for the terminal device to send a backscatter signal.

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. 9 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. 7, 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 acquisition unit 410 referred to above may be implemented by a processor, and the transmission unit 410 and the transmission unit 510 referred to above may be implemented by a transceiver.

Fig. 10 is a schematic structural diagram of a communication apparatus 600 of an embodiment of the present application.

As shown in fig. 10, 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. 10, 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. 10, 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. 11 is a schematic structural diagram of a chip 700 according to an embodiment of the present application.

As shown in fig. 11, 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. 11, 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. 11, 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. 11, 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:

acquiring a first Timing Advance (TA) value of terminal equipment;

and transmitting a back scattering signal based on the first TA value.
The method according to claim 1, wherein the obtaining the first timing advance TA value of the terminal device comprises:

acquiring first indication information;

and determining the first TA value based on the TA value indicated by the first indication information.
The method of claim 2, wherein the first TA value is a TA value selected from a plurality of preset TA values.
A method according to claim 2 or 3, wherein said determining the first TA value based on the TA value indicated by the first indication information comprises:

storing the TA value indicated by the first indication information or updating the stored TA value by using the TA value indicated by the first indication information;

And when the energy collection or the charging is completed, determining the latest stored TA as the first TA value.
The method of claim 4, wherein the obtaining the first indication information comprises:

and acquiring the first indication information in the process of energy acquisition or charging of the terminal equipment.
The method of claim 4, wherein the first indication information is carried in an energizing signal.
A method according to claim 2 or 3, wherein said determining the first TA value based on the TA value indicated by the first indication information comprises:

and determining the TA value indicated by the first indication information as the first TA value.
The method of claim 7, wherein the obtaining the first indication information comprises:

and when the energy collection or the charging is completed, acquiring the first indication information.
The method of claim 7, wherein the first indication information is carried in a trigger signal.
The method according to any of claims 2 to 9, wherein the first indication information is periodically or aperiodically transmitted information.
The method of claim 10, wherein a transmission period of the first indication information is preset.
The method of claim 10, wherein the transmission period of the first indication information is a period selected from a plurality of preset periods.
The method according to any of claims 2 to 9, wherein the first indication information is carried over a plurality of time units, the first indication information carried over the plurality of time units being used to indicate a plurality of TA values, respectively.
The method of claim 13, wherein the plurality of TA values are different, partially identical, or identical to each other.
The method of claim 13, wherein the plurality of TA values are ordered in the time domain in order of from small to large or from large to small; or the plurality of TA values are uniformly distributed in the time domain; or the plurality of TA values are unevenly distributed in the time domain.
A method according to claim 2 or 3, wherein the first indication information is a number of preambles in an energy supply signal, and if the number of preambles in the energy supply signal is a first value, the first indication information is used to indicate that the first TA value is a TA value corresponding to the first value.
The method according to claim 1, wherein the obtaining the first timing advance TA value of the terminal device comprises:

the first TA value is determined based on the strength of the first signal measured by the terminal device.
The method of claim 17, wherein the first TA value decreases as the strength of the first signal increases; or the first TA value increases with decreasing strength of the first signal.
The method according to claim 17 or 18, wherein said determining said first TA value based on the strength of a first signal measured by the terminal device comprises:

a first intensity classification based on the intensity of the first signal;

and determining a TA value corresponding to the first intensity classification as the first TA value based on a first mapping relation, wherein the first mapping relation comprises at least one intensity classification and the TA value corresponding to each intensity classification, and the at least one intensity classification comprises the first intensity classification.
The method according to any of the claims 17 to 19, wherein said determining the first TA value based on the strength of the first signal measured by the terminal device comprises:

Determining a first ratio of the strength of the first signal to the strength of the network device when the first signal is transmitted;

and determining a TA value corresponding to a first ratio range to which the first ratio belongs as the first TA value based on a second mapping relation, wherein the second mapping relation comprises at least one ratio range and TA values corresponding to each ratio range, and the at least one ratio range comprises the first ratio range.
The method according to claim 1, wherein the obtaining the first timing advance TA value of the terminal device comprises:

the first TA value is determined based on a first length of an energy harvesting time or a charging time of the terminal device.
The method of claim 21, wherein the first TA value increases with increasing first length; or the first TA value decreases with decreasing first length.
The method according to claim 21 or 22, wherein said determining the first TA value based on a first length of an energy harvesting time or a charging time of the terminal device comprises:

a first length hierarchy based on which the first length belongs;

and determining the TA value corresponding to the first length grade as the first TA value based on a third mapping relation, wherein the third mapping relation comprises at least one length grade and the TA value corresponding to each length grade, and the at least one length grade comprises the first length grade.
The method according to any of claims 21 to 23, wherein the determining the first TA value 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;

and determining a TA value corresponding to a second ratio range to which the second ratio belongs as the first TA value based on a fourth mapping relation, wherein the fourth mapping relation comprises at least one ratio range and TA values corresponding to each ratio range, and the at least one ratio range comprises the second ratio range.
The method of claim 1, wherein the first TA value is preset.
A method of wireless communication, comprising:

and sending first indication information, wherein a TA value indicated by the first indication information is used for determining the first TA value by the terminal equipment, and the first TA value is used for sending a back scattering signal by the terminal equipment.
The method of claim 26, wherein the first TA value is a TA value selected from a plurality of preset TA values.
The method of claim 26 or 27, wherein the first indication information is carried in an energizing signal.
The method according to claim 26 or 27, wherein the first indication information is carried in a trigger signal.
The method according to any one of claims 26 to 29, wherein the first indication information is periodically or aperiodically transmitted information.
The method of claim 30, wherein the transmission period of the first indication information is preset.
The method of claim 30, wherein the transmission period of the first indication information is a period selected from a plurality of preset periods.
The method according to any one of claims 26 to 32, wherein the first indication information is carried over a plurality of time units, the first indication information carried over the plurality of time units being used to indicate a plurality of TA values, respectively.
The method of claim 33, wherein the plurality of TA values are different, partially identical, or identical to each other.
The method of claim 33, wherein the plurality of TA values are ordered in the time domain from small to large or from large to small; or the plurality of TA values are uniformly distributed in the time domain; or the plurality of TA values are unevenly distributed in the time domain.
The method according to claim 26 or 27, wherein the first indication information is a number of preambles in an energy supply signal, and if the number of preambles in the energy supply signal is a first value, the first indication information is used to indicate that the first TA value is a TA value corresponding to the first value.
A terminal device, comprising:

an acquiring unit, configured to acquire a first timing advance TA value of a terminal device;

and a transmitting unit, configured to transmit a backscatter signal based on the first TA value.
A network device, comprising:

an acquiring unit, configured to acquire a first timing advance TA value of a terminal device;

and a receiving unit, configured to receive a backscatter signal based on the first TA value.
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 25.
A network 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 26 to 36.
A chip, comprising:

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 of any one of claims 1 to 25 or the method of any one of claims 26 to 36.
A computer readable storage medium storing a computer program for causing a computer to perform the method of any one of claims 1 to 25 or the method of any one of claims 26 to 36.
A computer program product comprising computer program instructions for causing a computer to perform the method of any one of claims 1 to 25 or the method of any one of claims 26 to 36.
A computer program, characterized in that the computer program causes a computer to perform the method of any one of claims 1 to 25 or the method of any one of claims 26 to 36.