CN117203639A

CN117203639A - Wireless communication method and terminal equipment

Info

Publication number: CN117203639A
Application number: CN202180097234.0A
Authority: CN
Inventors: 崔胜江; 徐伟杰; 左志松; 贺传峰; 张治�
Original assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Current assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority date: 2021-07-27
Filing date: 2021-07-27
Publication date: 2023-12-08
Also published as: WO2023004583A1

Abstract

The application provides a wireless communication method and terminal equipment, wherein a zero-power consumption terminal can determine an uplink channel and/or a time-frequency resource set of primary transmission and retransmission, so that the backscattering transmission performance of the terminal equipment can be improved. The method of wireless communication includes: the terminal device determines an uplink channel for transmitting the target backscatter signal multiple times and/or the terminal device determines a set of time-frequency resources for transmitting the target backscatter signal multiple times (S210).

Description

Wireless communication method and terminal equipment

Technical Field

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

Background

In the zero-power consumption communication, the zero-power consumption terminal can drive the terminal to work only after acquiring the energy obtained by radio waves sent by the network node. How to perform initial transmission and retransmission for a zero-power-consumption terminal is a problem to be solved.

Disclosure of Invention

The embodiment of the application provides a wireless communication method and terminal equipment, wherein a zero-power consumption terminal can determine an uplink channel and/or a time-frequency resource set of primary transmission and retransmission, so that the backscattering transmission performance of the terminal equipment can be improved.

In a first aspect, a method of wireless communication is provided, the method comprising:

the terminal device determines an uplink channel for transmitting the target backscatter signal multiple times and/or the terminal device determines a set of time-frequency resources for transmitting the target backscatter signal multiple times.

In a second aspect, a terminal device is provided for performing the method in the first aspect.

Specifically, the terminal device comprises functional modules for performing the method in the first aspect described above.

In a third aspect, a terminal device is provided 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 first aspect.

In a fourth aspect, there is provided an apparatus for implementing the method of the first aspect.

Specifically, the device comprises: a processor for calling and running a computer program from a memory, causing a device in which the apparatus is installed to perform the method as in the first aspect described above.

In a fifth aspect, a computer-readable storage medium is provided for storing a computer program that causes a computer to execute the method in the first aspect described above.

In a sixth aspect, there is provided a computer program product comprising computer program instructions for causing a computer to perform the method of the first aspect described above.

In a seventh aspect, there is provided a computer program which, when run on a computer, causes the computer to perform the method of the first aspect described above.

By the technical scheme, the terminal equipment determines the uplink channel for transmitting the target back-scattering signal for multiple times, and/or the terminal equipment determines the time-frequency resource set for transmitting the target back-scattering signal for multiple times, so that the back-scattering transmission performance of the terminal equipment can be improved, and the probability of collision with other terminal equipment in multiple times of transmission is reduced.

Drawings

Fig. 1 is a schematic diagram of a communication system architecture to which embodiments of the present application apply.

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

Fig. 3 is a schematic diagram of a backscatter communication provided by the present application.

Fig. 4 is a schematic diagram of an energy harvesting device according to the present application.

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

Fig. 6 is a schematic flow chart diagram of a method of wireless communication provided in accordance with an embodiment of the present application.

Fig. 7 is a schematic diagram of an uplink channel pair during FSK modulation according to an embodiment of the present application.

Fig. 8 is a schematic diagram of BSCH for primary and retransmission of a backscatter signal according to an embodiment of the present application.

Fig. 9 is a schematic diagram of another BSCH for use in primary and retransmission of a backscattered signal in accordance with an embodiment of the present application.

Fig. 10 is a schematic diagram of a set of time-frequency resources for primary transmission and retransmission of a backscattered signal according to an embodiment of the application.

Fig. 11 is a schematic diagram of another set of time-frequency resources for initial transmission and retransmission of a backscattered signal provided according to an embodiment of the application.

Fig. 12 is a schematic diagram of a set of time-frequency resources according to an embodiment of the present application.

Fig. 13 is a schematic diagram of another set of time-frequency resources provided according to an embodiment of the present application.

Fig. 14 is a schematic block diagram of a terminal device according to an embodiment of the present application.

Fig. 15 is a schematic block diagram of a communication device provided according to an embodiment of the present application.

Fig. 16 is a schematic block diagram of an apparatus provided in accordance with an embodiment of the present application.

Fig. 17 is a schematic block diagram of a communication system provided in accordance with 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.

The technical scheme of 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, advanced long term evolution (Advanced long term evolution, LTE-a) system, new Radio (NR) system, evolved system of NR system, LTE-based access to unlicensed spectrum, LTE-U) system on unlicensed spectrum, NR (NR-based access to unlicensed spectrum, NR-U) system on unlicensed spectrum, non-terrestrial communication network (Non-Terrestrial Networks, NTN) system, universal mobile communication system (Universal Mobile Telecommunication System, UMTS), wireless local area network (Wireless Local Area Networks, WLAN), wireless fidelity (Wireless Fidelity, wiFi), fifth Generation communication (5 th-Generation, 5G) system, or other communication system, etc.

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, device-to-Device (D2D) communication, machine-to-machine (Machine to Machine, M2M) communication, machine type communication (Machine Type Communication, MTC), inter-vehicle (Vehicle to Vehicle, V2V) communication, or internet of vehicles (Vehicle to everything, V2X) communication, etc., to which the embodiments of the present application can also be applied.

In some embodiments, the communication system in the embodiments 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) networking scenario.

In some embodiments, the communication system in the embodiments of the present application may be applied to unlicensed spectrum, where unlicensed spectrum may also be considered as shared spectrum; alternatively, the communication system in the embodiment of the present application may also be applied to licensed spectrum, where licensed spectrum may also be considered as non-shared spectrum.

Embodiments of the present application are described in connection with a network device and a terminal device, where the terminal device may also be referred to as a User Equipment (UE), 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, a User Equipment, or the like.

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, a terminal device in a next generation communication system such as an NR network, or a terminal device in a future evolved public land mobile network (Public Land Mobile Network, PLMN) network, etc.

In the embodiment of the application, the terminal equipment can be deployed on land, including indoor or outdoor, handheld, wearable or vehicle-mounted; can also be deployed on the water surface (such as ships, etc.); but may also be deployed in the air (e.g., on aircraft, balloon, satellite, etc.).

In the embodiment of the present application, the terminal device may be a Mobile Phone (Mobile Phone), a tablet computer (Pad), a computer with a wireless transceiving function, a Virtual Reality (VR) terminal device, an augmented Reality (Augmented Reality, AR) terminal device, a wireless terminal device in industrial control (industrial control), a wireless terminal device in unmanned driving (self driving), a wireless terminal device in remote medical (remote medical), a wireless terminal device in smart grid (smart grid), a wireless terminal device in transportation security (transportation safety), a wireless terminal device in smart city (smart city), or a wireless terminal device in smart home (smart home), and the like.

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.

In the embodiment of the present application, the network device may be a device for communicating with a mobile device, where the network device may be an Access Point (AP) in a 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, a relay station or an Access Point, a vehicle device, a wearable device, a network device or a base station (gNB) in an NR network, a network device in a PLMN network evolved in the future, or a network device in an NTN network, etc.

By way of example, and not limitation, in embodiments of the present application, a network device may have a mobile nature, e.g., the network device may be a mobile device. In some embodiments, the network device may be a satellite, a balloon station. For example, the satellite may be a Low Earth Orbit (LEO) satellite, a medium earth orbit (medium earth orbit, MEO) satellite, a geosynchronous orbit (geostationary earth orbit, GEO) satellite, a high elliptical orbit (High Elliptical Orbit, HEO) satellite, or the like. In some embodiments, the network device may also be a base station located on land, in water, etc.

In the embodiment of the present application, a network device may provide services for a cell, where a terminal device communicates with the network device through a transmission resource (e.g., a frequency domain resource, or a spectrum resource) used by the cell, where the cell may be a cell corresponding to the network device (e.g., a base station), and the cell may belong to a macro base station, or may belong to 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.

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, and in some embodiments, the communication system 100 may include multiple network devices and may include other numbers of terminal devices within the coverage area of each network device, which is not limited by the embodiments of the present application.

In some embodiments, the communication system 100 may further include a network controller, a mobility management entity, and other network entities, which are not limited in this 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.

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.

The terminology used in the description of the embodiments of the application herein is for the purpose of describing particular embodiments of the application only and is not intended to be limiting of the application. The terms "first," "second," "third," and "fourth" and the like in the description and in the claims and drawings are used for distinguishing between different objects and not necessarily for describing a particular sequential or chronological order. Furthermore, the terms "comprise" and "have," as well as any variations thereof, are intended to cover a non-exclusive inclusion.

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

In 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.

In the embodiment of the present application, the "pre-defining" or "pre-configuring" may be implemented by pre-storing corresponding codes, tables or other manners that may be used to indicate relevant information in devices (including, for example, terminal devices and network devices), and the present application is not limited to the specific implementation manner thereof. Such as predefined may refer to what is defined in the protocol.

In the embodiment of the present application, the "protocol" may refer to a standard protocol in the communication field, for example, may include an LTE protocol, an NR protocol, and related protocols applied in a future communication system, which is not limited in the present application.

In order to facilitate understanding of the technical solution of the embodiments of the present application, the related art of the present application will be described.

In recent years, zero power consumption devices have been increasingly used. A typical zero power device is radio frequency identification (Radio Frequency Identification, RFID), which is a technology for implementing automatic transmission and identification of contactless tag information by using a wireless 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-active electronic tag inherits the advantages of small size, light weight, low price and long service life of the passive electronic tag, and when the built-in battery is not accessed by a reader-writer, the built-in battery only provides power for few circuits in the chip, and when the reader-writer is accessed, the built-in battery only provides power for the RFID chip, so that the read-write distance of the tag is increased, and the reliability of communication is improved.

RFID is a wireless communication technology. The most basic RFID system is composed of two parts, an electronic TAG (TAG) and a Reader/Writer (Reader/Writer). Electronic tag: the electronic tag consists of a coupling component and a chip, and each electronic tag has unique electronic codes and is placed on a measured target so as to achieve the purpose of marking the target object. A reader/writer: the electronic tag can read information on the electronic tag, write information on the electronic tag, and provide energy required by communication for the electronic tag. As shown in fig. 2. After the electronic tag enters the electromagnetic field, the radio frequency signal sent by the reader-writer is received, the passive electronic tag or the passive electronic tag utilizes the energy obtained by the electromagnetic field generated in the space to transmit the information stored by the electronic tag, and the reader-writer reads the information and decodes the information, so that the electronic tag is identified.

Key technologies for zero-power communication include energy harvesting and backscatter communication and low-power computation, as shown in fig. 2, a typical zero-power communication system includes a reader and a zero-power terminal. The reader/writer emits radio waves for supplying energy to the zero-power consumption terminal. The energy collection module installed in the zero-power consumption terminal can collect the energy carried by radio waves in the space (the radio waves emitted by the reader-writer are shown in fig. 2), and is used for driving the low-power consumption calculation module of the zero-power consumption terminal and realizing back scattering communication. After the zero-power consumption terminal obtains energy, the zero-power consumption terminal can receive a control command of the reader-writer and send data to the reader-writer based on a backscattering mode based on the control command. The data transmitted may be from data stored by the zero power terminal itself (e.g., an identification or pre-written information, such as the date of manufacture, brand, manufacturer, etc. of the merchandise). The zero-power consumption terminal can also load various sensors, so that data acquired by the various sensors are reported based on a zero-power consumption mechanism.

Hereinafter, a key technology in zero power consumption communication will be described.

1. Backscatter communication (Back Scattering)

As shown in fig. 3, the zero power device (the backscatter tag in fig. 3) receives the carrier signal transmitted by the backscatter reader, and collects energy through the RF energy collection module. And further functions as a low power processing module (logic processing module in fig. 3), modulates an incoming wave signal, and performs backscattering.

The main characteristics of the backscatter communication are as follows:

(1) The terminal does not actively transmit signals, and the backscattering communication is realized by modulating incoming wave signals;

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

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

2. Energy harvesting (RF Power Harvesting)

As shown in fig. 4, the RF module is used to collect electromagnetic wave energy in space by electromagnetic induction, and further drive the load circuit (low power operation, sensor, etc.), so that battery-free operation can be realized.

3. Load modulation

Load modulation is a method frequently used by electronic tags to transmit data to a reader-writer. The load modulation is to adjust the electric parameters of the electronic tag oscillation circuit according to the beat of the data stream, so that the impedance and the phase of the electronic tag are changed accordingly, and the modulation process is completed. The load modulation technology mainly comprises two modes of resistance load modulation and capacitance load modulation. In resistive load modulation, the load is connected in parallel with a resistor, called a load modulation resistor, which is turned on and off according to the clock of the data stream, and the on-off of the switch S is controlled by binary data encoding. A schematic diagram of the resistive load modulation is shown in fig. 5.

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

4. Coding techniques

The data transmitted by the electronic tag can be represented by binary '1' and '0' 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.

5. Energy supply signal in zero-power consumption communication system

From the energy supply signal carrier, the energy supply signal carrier can be a base station, a smart phone, an intelligent gateway, a charging station, a micro base station and the like;

from the frequency band, the radio wave used as the power supply may be a low frequency, an intermediate frequency, a high frequency, or the like;

from the waveform, the radio wave used as the power supply may be a sine wave, a square wave, a triangular wave, a pulse, a rectangular wave, or the like;

in addition, the device can be a continuous wave or a discontinuous wave (namely, a certain time is allowed to be interrupted);

the energy supply may be a signal specified in The third generation partnership project (The 3rd Generation Partnership Project,3GPP) standard. Such as sounding reference signals (Sounding Reference Signal, SRS), physical uplink shared channels (Physical Uplink Shared Channel, PUSCH), physical random access channels (Physical Random Access Channel, PRACH), physical uplink control channels (Physical Uplink Control Channel, PUCCH), physical downlink control channels (Physical Downlink Control Channel, PDCCH), physical downlink shared channels (Physical Downlink Shared Channel, PDSCH), physical broadcast channels (Physical Broadcast Channel, PBCH), and the like.

6. Trigger signal in zero power consumption communication system

From the energy supply signal carrier, the energy supply signal carrier can be a base station, a smart phone, an intelligent gateway and the like;

in addition, the wave may be continuous wave or discontinuous wave (i.e. allowing a certain time to be interrupted)

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.

7. Cellular passive internet of things

With the increase of 5G industry application, the variety and application scene of the connection object are more and more, the price and the power consumption of the communication terminal are also higher, the application of the battery-free and low-cost passive internet of things equipment becomes a key technology of the cellular internet of things, the type and the number of the 5G network link terminals are enriched, and the universal interconnection is truly realized. The passive internet of things device can be based on the existing zero-power-consumption device, such as an 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.

8. Classification of zero power consumption terminals

Zero power consumption terminals can be classified into the following types based on their energy sources and usage patterns:

1) Passive zero-power consumption terminal

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 neither the forward link nor the reverse link needs a built-in battery to drive.

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, analog-to-Digital Converter (ADC) and other devices 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) Semi-passive zero-power consumption 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.

It can be seen that the semi-passive zero-power-consumption terminal is driven by no built-in battery in both the forward link and the reverse link, and the energy stored by the capacitor is used in the work, but the energy is derived from the wireless energy collected by the energy collection 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) Active zero power consumption terminal

The zero-power consumption terminal used in some scenes can also be an active zero-power consumption terminal, and the terminal can be internally provided with a 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.

And the active zero-power consumption terminal is provided with a built-in battery for supplying power to the RFID chip so as to increase the read-write distance of the tag and improve the reliability of communication. Therefore, in some fields requiring relatively high communication distance, read delay and the like, the method is applied.

9. Anti-collision treatment

Generally, a plurality of electronic tags are simultaneously arranged in a working range of the reader-writer, and the plurality of electronic tags simultaneously transmit data to the reader-writer, which causes collision of the electronic tag data, so that the reader-writer cannot normally read related data of each electronic tag. In wireless communication, there are 4 kinds of anti-collision solutions for data collision, which are a space division multiplexing method, a frequency division multiplexing method, a time division multiplexing method, and a code division multiplexing method, respectively.

The key to solving the anti-collision problem is an optimized anti-collision algorithm. The RFID anti-collision algorithm is mainly based on a tri-diagonal matrix (Tridiagonal Matrices, TDMA) algorithm, and can be classified into ALOHA anti-collision algorithm and binary search algorithm. The anti-collision algorithm can enable the throughput rate of the system and the utilization rate of the channel to be higher, the required time slots are fewer, and the accuracy rate of data is higher.

In order to facilitate understanding of the technical solution of the embodiments of the present application, the prior art and the problems existing in the present application will be described.

In the zero-power consumption communication, the zero-power consumption terminal can drive the terminal to work only after acquiring the energy obtained by radio waves sent by the network node. With the development of industry, the number of devices accessing the network has proliferated, and the number of zero-power devices used in cellular systems will be enormous. Therefore, the probability of collision is higher in the zero-power communication problem in the cellular network, the existing anti-collision mechanism cannot completely match the service requirement, and a new anti-collision solving mechanism needs to be introduced in the zero-power communication of the cellular network.

Based on the above problems, the application provides a scheme for primary transmission and retransmission of a zero-power-consumption terminal, and the zero-power-consumption terminal can determine uplink channels and/or time-frequency resource sets of primary transmission and retransmission, so that the backscattering transmission performance of the terminal equipment can be improved.

The technical scheme of the application is described in detail below through specific embodiments.

Fig. 6 is a schematic flow chart diagram of a method 200 of wireless communication according to an embodiment of the application, as shown in fig. 6, the method 200 of wireless communication may include at least some of the following:

s210, the terminal device determines an uplink channel for transmitting the target backscatter signal multiple times, and/or the terminal device determines a set of time-frequency resources for transmitting the target backscatter signal multiple times.

In the embodiment of the present application, multiple transmissions may refer to an initial transmission and at least one retransmission.

The terminal device is a device that does not actively transmit signals and utilizes signals sent by the network device or other devices to carry information, e.g., a zero power consumption terminal.

The embodiment of the application can be applied to a cellular internet of things system, such as a cellular passive internet of things system, or can be applied to other scenes that the terminal equipment sends information to the network equipment in a zero-power communication or battery-free communication mode, and the application is not limited to the above.

It should be noted that, the zero power consumption communication method may include a back scattering communication method, or may also include other methods for the zero power consumption terminal to communicate introduced in the standard evolution, and in the following, the terminal device is described as an example to communicate with the network device through the back scattering method, but the present application is not limited thereto.

In the embodiment of the application, the capability acquisition module of the terminal equipment can support broadband reception, namely the terminal equipment can receive wireless signals in a relatively wide bandwidth range and acquire energy. In this way, the network device transmits a downlink signal within the bandwidth range supported by the terminal device, the terminal device can acquire capacity to obtain energy, activate a chip circuit inside the terminal device based on the obtained energy, and enter an 'activation' state.

In some embodiments, after the terminal device enters the "active" state, it may receive a downlink signal (or forward link signal) sent by the network device, where the channel bandwidth for data communication by the terminal device is typically limited, e.g., 200KHz. Under the condition that the network equipment is deployed with a plurality of downlink channels, the terminal equipment needs to determine a target downlink channel for receiving the downlink signal so as to receive the downlink signal sent by the network equipment and acquire the downlink information sent by the network equipment.

In cellular networks, since the zero-power devices are not battery powered, power signals need to be provided by a base station or a dedicated power node or other intelligent terminal device for the zero-power devices to obtain power, so that corresponding communication procedures can be performed. Because the energy of the energy supply signal can be increased and attenuated along with the distance, when the energy supply signal is received by different zero-power consumption devices, the signal strength of the energy supply signal is different, and the time for the energy collection of the different zero-power consumption devices is also different. In particular, there is a type of zero-power-consumption terminal, and because the intensity of the received energy supply signal is very low, a long time is required for communication, and the collision of the type of zero-power-consumption terminal can bring about larger influence.

In some embodiments, the Uplink (UL) channel is a channel for backscatter communications for zero power consumption terminals. The number of uplink channels used in zero power consumption communication is related to a specific modulation scheme. If amplitude shift keying (Amplitude Shift Keying, ASK) or Phase Shift Keying (PSK) modulation is used, the uplink channel only needs to occupy one channel. However, if a Frequency-shift keying (FSK) modulation scheme is used, since the terminal may generate a backscatter signal at two Frequency locations, the two Frequency locations are symmetrical with respect to the channel occupied by the downlink signal transmitted by the network for terminal backscatter. If the zero power consumption terminal does not use filtering measures to filter out the reflected and scattered signal at one of the frequency positions, the back scattered signal will occupy the two frequency positions. Thus, the uplink Channel is two symmetric Channels (CH), which we call a group or a pair of uplink Channels (CH) at this time, as shown in fig. 7.

In some embodiments, the terminal device determines an uplink channel for transmitting the target backscatter signal for multiple times from M preset uplink channels for backscatter communication, where M is a positive integer, and M is greater than or equal to 2.

In some embodiments, the terminal device determines an uplink channel for transmitting the target backscatter signal multiple times from the M uplink channels according to a first preset rule.

In some embodiments, the first preset rule includes, but is not limited to, one of:

the frequency of the uplink channel is in the order from low to high, and the frequency of the uplink channel is in the order from high to low, and the corresponding relation between the uplink channel and the transmission times is achieved.

For example, in the case that the first preset rule is that the frequencies of the uplink channels are in the order from low to high, the terminal device determines that the uplink channel with the lowest frequency among the M uplink channels is used for initially transmitting the target backscatter signal, and sequentially selects the uplink channels for retransmitting the target backscatter signal based on the order from low to high of the frequencies of the uplink channels.

For another example, in the case that the first preset rule is that the frequencies of the uplink channels are in the order from high to low, the terminal device determines that the uplink channel with the highest frequency among the M uplink channels is used for initially transmitting the target backscatter signal, and sequentially selects the uplink channels for retransmitting the target backscatter signal based on the order from high to low of the frequencies of the uplink channels.

For another example, in the case that the first preset rule is a correspondence between an uplink channel and the number of transmissions, the terminal device determines an uplink channel for transmitting the target backscatter signal multiple times based on the correspondence.

In some embodiments, the plurality of terminal devices uses the same one of the M uplink channels as the uplink channel for the primary backscatter signal, the plurality of terminal devices including the terminal device.

In some embodiments, the plurality of terminal devices each use a different set of time-frequency resources on the same one of the M uplink channels as the set of time-frequency resources of the primary backscatter signal.

In some embodiments, the upstream channel of the M upstream channels used for the initial transmission of the target backscatter signal is pre-configured or agreed to by a protocol, or the upstream channel of the M upstream channels used for the initial transmission of the target backscatter signal is indicated by a network device.

In some embodiments, an upstream channel of the M upstream channels, identified as i, is used for an ith transmission of the target backscatter signal, i is an integer, and 0.ltoreq.i.ltoreq.M-1; wherein, when i=0, an uplink channel with a channel identifier i in the M uplink channels is used for primary transmission of the target backscatter signal; when i is equal to or greater than 1, an uplink channel with a channel identifier i in the M uplink channels is used for the ith retransmission of the target backscatter signal.

In some embodiments, the uplink channel may be referred to as a backscatter channel (Back Scattering Channel, BSCH).

For example, a BSCH with channel identification i of M BSCHs is used for the ith transmission of the backscatter signal, when i=0, indicating that BSCH 0 is used for the first transmission, i.e., the initial transmission: a plurality of terminal devices all use BSCH 0 as a primary transmission channel, when a back scattering signal collides or a base station fails to decode correctly, a new back scattering signal transmission is needed, and at the moment, BSCH 1 can be used as a first retransmission channel to perform back scattering communication on the BSCH 1; if collision still occurs or the base station cannot decode correctly, the base station needs to send the back-scattered signal again, at this time, BSCH 2 may be used as the 2 nd retransmission channel, and the 2 nd retransmission of the back-scattered signal is performed on the BSCH 2, and so on, as shown in fig. 8, fig. 8 illustrates that the back-scattered signal is transmitted on one BSCH, and as described above, if FSK modulation is used and the terminal does not perform filtering processing, BSCH 0, BSCH 1, and the like are a set of symmetrical channels, and related descriptions are similar and are not repeated herein.

In some embodiments, in the case that the terminal device is an edge user, an uplink channel with a channel identifier i+k of the M uplink channels is used for the ith transmission of the target backscatter signal, i is an integer, k is a positive integer, and i is greater than or equal to 0, i+k is less than or equal to M-1; wherein,

When i=0, an uplink channel with a channel identifier k in the M uplink channels is used for primary transmission of the target backscatter signal;

when i is more than or equal to 1, an uplink channel with a channel identifier of i+k in the M uplink channels is used for the ith retransmission of the target backscatter signal.

In some embodiments, a plurality of terminal devices, including the terminal device, use different ones of the M uplink channels as uplink channels for the primary backscatter signal.

In some embodiments, an uplink channel of the M uplink channels for initial transmission of the target backscatter signal is indicated by a network device; alternatively, an uplink channel for initial transmission of the target backscatter signal from the M uplink channels is determined for the terminal device.

In some embodiments, the uplink channel used for primary transmission of the target backscatter signal in the M uplink channels is determined by the terminal device according to the result of M modulo a part of bits in the identifier of the terminal device; or,

the uplink channel for primary transmission of the target backscatter signal in the M uplink channels is determined by the terminal device according to the received signal strength of the energy supply signal and/or the trigger signal; or,

The uplink channel for primary transmission of the target backscatter signal in the M uplink channels is determined by the terminal device according to the length of self-charging time.

In some embodiments, an upstream channel, the channel identification of which is j, of the M upstream channels is used for the ith transmission of the target backscatter signal, and an upstream channel, the channel identification of which is j+t, of the M upstream channels is used for the ith+1th transmission of the target backscatter signal, i is an integer, t is a positive integer, and i.gtoreq.0, 0.ltoreq.j+t.ltoreq.M-1.

For example, t=2, bsch _j Ith transmission for backscatter signal, BSCH _j+2 For the (i+1) th transmission of the backscattered signal. As shown in fig. 9, fig. 9 illustrates that the backscatter signal is transmitted on an uplink channel, and if FSK modulation is used and the terminal does not perform filtering processing, BSCH 0, BSCH 1, etc. are a set of symmetric uplink channels. And the zero-power consumption terminal performs primary transmission of the back-scattered signal on the BSCH 1, performs 1 st retransmission of the back-scattered signal on the BSCH 3 when collision occurs or the decoding failure of the base station needs retransmission, and performs 2 nd retransmission of the back-scattered signal on the BSCH 5 when collision occurs again or the decoding failure of the base station needs retransmission again.

Channel identification in the case that the terminal device is an edge user, the uplink channel used for primary transmission of the target backscatter signal in the M uplink channels is an uplink channel whose average usage rate is lower than a first threshold value, or the uplink channel used for primary transmission of the target backscatter signal in the M uplink channels is one uplink channel of at least one uplink channel used for an edge user in the M uplink channels.

In some embodiments, an upstream channel of the M upstream channels allows for at least one transmission of the target backscatter signal.

In some embodiments, the maximum number of transmissions supported by each of the M uplink channels is pre-configured or agreed upon by a protocol, or the maximum number of transmissions supported by each of the M uplink channels is configured by a network device.

For example, if the maximum number of transmissions supported by each uplink channel is preset to be 2, the terminal device may perform initial transmission and 1 st retransmission on BSCH 0, and perform 2 nd and 3 rd retransmissions on BSCH 1.

In some embodiments, where each of the M upstream channels allows for multiple transmissions of the target backscatter signal, an anti-collision processing algorithm is allowed to be used superimposed on each of the upstream channels. For example, a collision avoidance algorithm based on dynamic ALOHA, or slotted ALOHA, etc. on each uplink channel.

In some embodiments, the superposition between different ones of the M uplink channels uses an anti-collision processing algorithm.

In some embodiments, the anti-collision processing algorithm used by the uplink channels of the M uplink channels is indicated by the network device, or the anti-collision processing algorithm used by the uplink channels of the M uplink channels is pre-configured or agreed by a protocol, or the anti-collision processing algorithm used by the uplink channels of the M uplink channels is a fixed anti-collision algorithm.

In some embodiments, in a case where the target backscatter signal also needs to be retransmitted after using the uplink channel with the largest channel identification among the M uplink channels, the terminal device continues to retransmit the target backscatter signal using the uplink channel with the largest channel identification among the M uplink channels. That is, after the preset uplink channel with the largest channel identifier is used, if collision still occurs or the base station decoding fails and needs to be retransmitted again, no other channel with larger identifier can be switched at this time, and the uplink channel with the largest identifier is continuously used.

In some embodiments, the bandwidths of each of the M uplink channels are equal; or,

The bandwidths of all the M uplink channels are not equal; or,

the bandwidths of some of the M uplink channels are not equal.

In some embodiments, the bandwidth of the upstream channel for the P-th transmission of the target backscatter signal is less than or equal to the bandwidth of the upstream channel for the Q-th transmission of the target backscatter signal, where P and Q are positive integers and P > Q.

In some embodiments, the terminal device transmits the target backscatter signal using the uplink channel after the handover after the first time domain offset in switching the uplink channel used to transmit the target backscatter signal. Thereby reducing the probability of collision.

In some embodiments, the first time domain offset is pre-configured or protocol agreed; alternatively, the first time domain offset is configured for the network device; or, the first time domain offset is a randomly selected one of S time domain offsets configured by the network equipment, and S is a positive integer; or under the condition that the network equipment is configured with S time domain offsets, the first time domain offset is determined by the terminal equipment according to the result of modulo S of part bits in the identification of the terminal equipment, and S is a positive integer.

In some embodiments, each of the M uplink channels is contiguous in the frequency domain, or each of the M uplink channels is discontinuous in the frequency domain.

In some embodiments, the terminal device is determined to be an edge device when the signal strength of the terminal device is below a preset threshold, or the charging time of the terminal device is above a preset threshold.

In some embodiments, the terminal device determines a time-frequency resource set for transmitting the target backscatter signal for multiple times from N preset time-frequency resource sets for backscatter communication, where N is a positive integer, and N is greater than or equal to 2.

In some embodiments, the N sets of time-frequency resources are preset sets of time-frequency resources on at least one uplink channel for backscatter communications.

In some embodiments, the number of sets of time-frequency resources on different ones of the at least one uplink channel is the same or the number of sets of time-frequency resources on different ones of the at least one uplink channel is different.

In some embodiments, the plurality of terminal devices uses the same one of the N sets of time-frequency resources as the set of time-frequency resources for the primary backscatter signal, the plurality of terminal devices including the terminal device.

In some embodiments, the set of time-frequency resources of the N sets of time-frequency resources for the initial transmission of the target backscatter signal is pre-configured or agreed to by a protocol, or the set of time-frequency resources of the N sets of time-frequency resources for the initial transmission of the target backscatter signal is indicated by a network device.

In some embodiments, a set of time-frequency resources of the N sets of time-frequency resources having a set index i is used for an ith transmission of the target backscatter signal, i is an integer, and 0.ltoreq.i.ltoreq.N-1;

when i=0, the time-frequency resource set with the index i of the time-frequency resource sets in the N time-frequency resource sets is used for the primary transmission of the target backscatter signal; when i is more than or equal to 1, the time-frequency resource set with the index of i in the time-frequency resource sets is used for the ith retransmission of the target backscatter signal.

For example, when i=0, it indicates that the initial transmission for the backscatter signal uses time-frequency resource set 0: all zero-power consumption terminal equipment uses a time-frequency resource set 0 for primary transmission, when a back-scattering signal collides or a base station fails to decode correctly, the back-scattering signal transmission needs to be carried out for the first time, and the time-frequency resource set 1 can be used as a time-frequency resource set for 1 st retransmission at the moment, and back-scattering communication is carried out on the time-frequency resource; if collision still occurs or the base station cannot decode correctly, the back scattering signal needs to be sent again, and at this time, the time-frequency resource set 2 can be used as the time-frequency resource set used for the 2 nd retransmission, and the retransmission of the 2 nd back scattering signal is performed on the time-frequency resource set, and so on, as shown in fig. 10 (here, the time-frequency resource set is exemplified as an example).

In some embodiments, when the terminal device is an edge user, a time-frequency resource set with a time-frequency resource set index of i+k in the N time-frequency resource sets is used for the ith transmission of the target backscatter signal, i is an integer, k is a positive integer, and i is greater than or equal to 0, i+k is less than or equal to N-1;

when i=0, the time-frequency resource set with the index k of the time-frequency resource sets in the N time-frequency resource sets is used for primary transmission of the target backscatter signal; when i is more than or equal to 1, the time-frequency resource set with the index of i+k in the time-frequency resource sets in the N time-frequency resource sets is used for the ith retransmission of the target backscatter signal.

In some embodiments, the plurality of terminal devices uses different ones of the N sets of time-frequency resources as the set of time-frequency resources for the primary backscatter signal, the plurality of terminal devices including the terminal device.

In some embodiments, the set of time-frequency resources of the N sets of time-frequency resources for the initial transmission of the target backscatter signal is indicated by a network device; or, the set of time-frequency resources used for the primary transmission of the target backscatter signal in the N sets of time-frequency resources is determined for the terminal device.

In some embodiments, the set of time-frequency resources used for the primary transmission of the target backscatter signal in the N sets of time-frequency resources is determined by the terminal device according to a result of modulo N of a part of bits in the identity of the terminal device; or,

the time-frequency resource set used for the primary transmission of the target backscatter signal in the N time-frequency resource sets is determined by the terminal equipment according to the received signal strength of the energy supply signal and/or the trigger signal; or,

and the time-frequency resource set used for the primary transmission of the target backscatter signal in the N time-frequency resource sets is determined by the terminal equipment according to the self charging time.

In some embodiments, a time-frequency resource set with a time-frequency resource set index j of the N time-frequency resource sets is used for the ith transmission of the target backscatter signal, and a time-frequency resource set with a time-frequency resource set index j+t of the N time-frequency resource sets is used for the ith+1th transmission of the target backscatter signal, i is an integer, t is a positive integer, and i is greater than or equal to 0,0 less than or equal to j+t is less than or equal to N-1.

For example, t=2, the set of time-frequency resources j is used for the ith transmission of the backscatter signal, and the set of time-frequency resources j+2 is used for the (i+1) th transmission of the backscatter signal. As shown in fig. 11, fig. 11 is an example of a set of time-frequency resources for transmission of a backscatter signal, and the like. The zero-power consumption equipment performs primary transmission of the back scattering signal on the time-frequency resource set 0, and performs 1 st retransmission of the back scattering signal on the time-frequency resource set 3 when collision or base station decoding failure needs retransmission, and performs 2 nd retransmission of the back scattering signal on the time-frequency resource set 5 when collision or base station decoding failure needs retransmission again.

In some embodiments, in the case that the terminal device is an edge user, the set of time-frequency resources used for the initial transmission of the target backscatter signal in the N sets of time-frequency resources is a set of time-frequency resources whose average usage rate is lower than a second threshold value, or the set of time-frequency resources used for the initial transmission of the target backscatter signal in the N sets of time-frequency resources is one of at least one set of time-frequency resources used for the edge user in the N sets of time-frequency resources.

In some embodiments, a set of time-frequency resources of the N sets of time-frequency resources allows for at least one transmission of the target backscatter signal.

In some embodiments, the maximum number of transmissions supported by each of the N sets of time-frequency resources is pre-configured or agreed upon by a protocol, or the maximum number of transmissions supported by each of the N sets of time-frequency resources is configured by a network device.

In some embodiments, where each of the N sets of time-frequency resources allows for multiple transmissions of the target backscatter signal, the anti-collision processing algorithm is allowed to be used in superposition on each of the sets of time-frequency resources.

In some embodiments, the overlap between different ones of the N sets of time-frequency resources uses an anti-collision processing algorithm.

In some embodiments, the anti-collision processing algorithm used by the time-frequency resource sets in the N time-frequency resource sets is indicated by the network device, or the anti-collision processing algorithm used by the time-frequency resource sets in the N time-frequency resource sets is pre-configured or agreed by a protocol, or the anti-collision processing algorithm used by the time-frequency resource sets in the N time-frequency resource sets is a fixed anti-collision algorithm.

In some embodiments, in a case where the target backscatter signal needs to be retransmitted after using the time-frequency resource set with the largest time-frequency resource set index in the N time-frequency resource sets, the terminal device continues to retransmit the target backscatter signal using the time-frequency resource set with the largest time-frequency resource set index in the N time-frequency resource sets.

In some embodiments, the resources occupied by each of the N sets of time-frequency resources are equal; or,

the resources occupied by each of the N sets of time-frequency resources are unequal.

In some embodiments, in the case that the resources occupied by each of the N sets of time-frequency resources are unequal, the set of time-frequency resources with index p occupies less resources than the set of time-frequency resources with index q, where p and q are positive integers and p > q.

In some embodiments, in the case where the resources occupied by each of the N sets of time-frequency resources are unequal, the resources occupied by the sets of time-frequency resources in the N sets of time-frequency resources gradually decrease with increasing index. For example, any i > j may be the resources occupied by time-frequency resource set j < the resources occupied by time-frequency resource set i.

In some embodiments, in the case where the resources occupied by each of the N sets of time-frequency resources are unequal, the resources occupied by the sets of time-frequency resources in the N sets of time-frequency resources decrease stepwise with increasing index. For example, the resource occupied by the time-frequency resource set i=the resource occupied by the time-frequency resource set i+1= … =the resource occupied by the time-frequency resource set i+k < the resource occupied by the time-frequency resource set j=the resource occupied by the time-frequency resource set j+1= … =the resource occupied by the time-frequency resource set j+k < the resource occupied by the time-frequency resource set l, where j > i+k, l > j+k.

In some embodiments, in switching the set of time-frequency resources used to transmit the target backscatter signal, the terminal device transmits the target backscatter signal after the second time-domain offset using the set of time-frequency resources after the switch.

In some embodiments, the second time domain offset is pre-configured or protocol agreed; alternatively, the second time domain offset is configured for the network device; or the second time domain offset is a randomly selected time domain offset in S time domain offsets configured by the network equipment, and S is a positive integer; or under the condition that the network equipment is configured with S time domain offsets, the second time domain offset is determined by the terminal equipment according to the result of modulo S of part bits in the identification of the terminal equipment, and S is a positive integer.

In some embodiments, each of the N sets of time-frequency resources is contiguous in the frequency domain, or each of the N sets of time-frequency resources is discontinuous in the frequency domain.

In some embodiments, the terminal device performs an r+1th transmission of the target backscatter signal after the third time domain offset after the R-th transmission of the target backscatter signal, R being a positive integer.

In some embodiments, the third time domain offset is pre-configured or protocol agreed; alternatively, the third time domain offset is configured for the network device; or, the third time domain offset is a randomly selected time domain offset in the S time domain offsets configured by the network equipment, and S is a positive integer; or under the condition that the network equipment is configured with S time domain offsets, the third time domain offset is determined by the terminal equipment according to the result of modulo S of part bits in the identification of the terminal equipment, and S is a positive integer.

For example, for the case where the set of time-frequency resources is not equally divided, the set of time-frequency resources may be as shown in fig. 12 and 13. Fig. 12 and 13 are only examples, and do not limit the number and size of the time resource sets.

Therefore, in the embodiment of the application, the terminal equipment determines the uplink channel for transmitting the target back-scattered signal for multiple times, and/or the terminal equipment determines the time-frequency resource set for transmitting the target back-scattered signal for multiple times, so that the back-scattered transmission performance of the terminal equipment can be improved, and the probability of collision with other terminal equipment in multiple times of transmission is reduced.

The method embodiment of the present application is described in detail above with reference to fig. 6 to 13, and the apparatus embodiment of the present application is described in detail below with reference to fig. 14, it being understood that the apparatus embodiment corresponds to the method embodiment, and similar descriptions can refer to the method embodiment.

Fig. 14 shows a schematic block diagram of a terminal device 300 according to an embodiment of the application. As shown in fig. 14, the terminal device 300 includes: a processing unit 310, wherein,

the processing unit 310 is configured to determine an uplink channel for transmitting the target backscatter signal multiple times and/or the processing unit 310 is configured to determine a set of time-frequency resources for transmitting the target backscatter signal multiple times.

In some embodiments, the processing unit 310 is specifically configured to:

and determining an uplink channel for transmitting the target backscatter signal for multiple times from M preset uplink channels for backscatter communication, wherein M is a positive integer, and M is more than or equal to 2.

In some embodiments, the processing unit 310 is specifically configured to:

and determining an uplink channel for transmitting the target backscatter signal for multiple times from the M uplink channels according to a first preset rule.

In some embodiments, the first preset rule includes one of:

In some embodiments, an upstream channel of the M upstream channels, identified as i, is used for an ith transmission of the target backscatter signal, i is an integer, and 0.ltoreq.i.ltoreq.M-1; wherein,

when i=0, an uplink channel with a channel identifier i in the M uplink channels is used for primary transmission of the target backscatter signal; when i is equal to or greater than 1, an uplink channel with a channel identifier i in the M uplink channels is used for the ith retransmission of the target backscatter signal.

In some embodiments, the uplink channel used for primary transmission of the target backscatter signal in the M uplink channels is determined by the terminal device according to the result of M modulo a part of bits in the identifier of the terminal device; or, the uplink channel for primary transmission of the target backscatter signal in the M uplink channels is determined by the terminal device according to the signal strength of the received energy supply signal and/or trigger signal; or, the uplink channel for the primary transmission of the target backscatter signal in the M uplink channels is determined by the terminal device according to the self-charging time.

In some embodiments, in the case that the terminal device is an edge user, the uplink channel used for the primary transmission of the target backscatter signal in the M uplink channels is an uplink channel whose average usage rate is lower than a first threshold value, or the uplink channel used for the primary transmission of the target backscatter signal in the M uplink channels is one of at least one uplink channel used for the edge user in the M uplink channels.

In some embodiments, where each of the M upstream channels allows for multiple transmissions of the target backscatter signal, an anti-collision processing algorithm is allowed to be used superimposed on each of the upstream channels.

In some embodiments, the terminal device 300 further comprises: a communication unit 320, wherein,

in the case that the target backscatter signal also needs to be retransmitted after the uplink channel with the largest channel identifier in the M uplink channels is used, the communication unit 320 is configured to retransmit the target backscatter signal by continuing to use the uplink channel with the largest channel identifier in the M uplink channels.

The bandwidths of all the M uplink channels are not equal; or,

the bandwidths of some of the M uplink channels are not equal.

in switching an uplink channel for transmitting the target backscatter signal, the communication element is configured to transmit the target backscatter signal using the uplink channel after the switch after the first time domain offset.

In some embodiments, the processing unit 310 is specifically configured to:

and determining a time-frequency resource set for transmitting the target back-scattered signal for multiple times from N preset time-frequency resource sets for back-scattered communication, wherein N is a positive integer, and N is more than or equal to 2.

in the case that the target back-scattered signal needs to be retransmitted after using the time-frequency resource set with the largest time-frequency resource set index in the N time-frequency resource sets, the communication unit 320 is configured to retransmit the target back-scattered signal by continuing to use the time-frequency resource set with the largest time-frequency resource set index in the N time-frequency resource sets.

In some embodiments, in the case that the resources occupied by each of the N time-frequency resource sets are unequal, the resources occupied by the time-frequency resource set with index p is smaller than the resources occupied by the time-frequency resource set with index q, where p and q are positive integers, and p > q; or,

in the case that the resources occupied by each of the N time-frequency resource sets are unequal, the resources occupied by the time-frequency resource sets in the N time-frequency resource sets gradually decrease with increasing indexes, or the resources occupied by the time-frequency resource sets in the N time-frequency resource sets gradually decrease with increasing indexes.

in switching the set of time-frequency resources used for transmitting the target backscatter signal, the communication unit 320 is configured to transmit the target backscatter signal using the set of time-frequency resources after the switch after the second time-domain offset.

after the R-th transmission of the target backscatter signal, the communication unit 320 is configured to perform an r+1th transmission of the target backscatter signal after a third time domain offset, where R is a positive integer.

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

It should be understood that the terminal device 300 according to the embodiment of the present application may correspond to the terminal device in the embodiment of the method of the present application, and the above and other operations and/or functions of each unit in the terminal device 300 are respectively for implementing the corresponding flow of the terminal device in the method 200 of wireless communication shown in fig. 6 to 13, which are not described herein for brevity.

Fig. 15 is a schematic block diagram of a communication device 400 according to an embodiment of the present application. The communication device 400 shown in fig. 15 comprises a processor 410, from which the processor 410 may call and run a computer program to implement the method in an embodiment of the application.

In some embodiments, as shown in fig. 15, the communication device 400 may also include a memory 420. Wherein the processor 410 may call and run a computer program from the memory 420 to implement the method in an embodiment of the application.

Wherein the memory 420 may be a separate device from the processor 410 or may be integrated into the processor 410.

In some embodiments, as shown in fig. 15, the communication device 400 may further include a transceiver 430, and the processor 410 may control the transceiver 430 to communicate with other devices, and in particular, may transmit information or data to other devices, or receive information or data transmitted by other devices.

Among other things, transceiver 430 may include a transmitter and a receiver. Transceiver 430 may further include antennas, the number of which may be one or more.

In some embodiments, the communication device 400 may be a network device in the embodiments of the present application, and the communication device 400 may implement corresponding flows implemented by the network device in the methods in the embodiments of the present application, which are not described herein for brevity.

In some embodiments, the communication device 400 may be specifically a terminal device according to an embodiment of the present application, and the communication device 400 may implement a corresponding flow implemented by the terminal device in each method according to an embodiment of the present application, which is not described herein for brevity.

Fig. 16 is a schematic structural view of an apparatus of an embodiment of the present application. The apparatus 500 shown in fig. 16 includes a processor 510, and the processor 510 may call and run a computer program from a memory to implement the method in an embodiment of the present application.

In some embodiments, as shown in fig. 16, the apparatus 500 may further include a memory 520. Wherein the processor 510 may call and run a computer program from the memory 520 to implement the method in an embodiment of the application.

Wherein the memory 520 may be a separate device from the processor 510 or may be integrated into the processor 510.

In some embodiments, the apparatus 500 may further include an input interface 530. The processor 510 may control the input interface 530 to communicate with other devices or chips, and in particular, may obtain information or data sent by other devices or chips.

In some embodiments, the apparatus 500 may further include an output interface 540. Wherein the processor 510 may control the output interface 540 to communicate with other devices or chips, and in particular may output information or data to other devices or chips.

In some embodiments, the apparatus may be applied to a network device in the embodiments of the present application, and the apparatus may implement corresponding flows implemented by the network device in each method in the embodiments of the present application, which are not described herein for brevity.

In some embodiments, the apparatus may be applied to a terminal device in the embodiments of the present application, and the apparatus may implement corresponding flows implemented by the terminal device in each method in the embodiments of the present application, which are not described herein for brevity.

In some embodiments, the device according to the embodiments of the present application may also be a chip. For example, a system-on-chip or a system-on-chip, etc.

Fig. 17 is a schematic block diagram of a communication system 600 provided by an embodiment of the present application. As shown in fig. 17, the communication system 600 includes a terminal device 610 and a network device 620.

The terminal device 610 may be used to implement the corresponding functions implemented by the terminal device in the above method, and the network device 620 may be used to implement the corresponding functions implemented by the network device in the above method, which are not described herein for brevity.

It should be appreciated that the processor of an embodiment of the present application may be an integrated circuit chip having signal processing capabilities. In implementation, the steps of the above method embodiments may be implemented by integrated logic circuits of hardware in a processor or instructions in software form. The processor may be a general purpose processor, a digital signal processor (Digital Signal Processor, DSP), an application specific integrated circuit (Application Specific Integrated Circuit, ASIC), an off-the-shelf programmable gate array (Field Programmable Gate Array, FPGA) or other programmable logic device, discrete gate or transistor logic device, discrete hardware components. The disclosed methods, steps, and logic blocks in the embodiments of the present application may be implemented or performed. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. 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 electrically 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.

It will be appreciated that the memory in embodiments of the application may be volatile memory or nonvolatile memory, or may include both volatile and 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 DRAM (SLDRAM), and Direct RAM (DR RAM). It should be noted that the memory of the systems and methods described herein is intended to comprise, without being limited to, these and any other suitable types of memory.

It should be understood that the above memory is illustrative but not restrictive, and for example, the memory in the embodiments of the present application may be Static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDR SDRAM), enhanced SDRAM (ESDRAM), synchronous Link DRAM (SLDRAM), direct RAM (DR RAM), and the like. That is, the memory in embodiments of the present application is intended to comprise, without being limited to, these and any other suitable types of memory.

The embodiment of the application also provides a computer readable storage medium for storing a computer program.

In some embodiments, the computer readable storage medium may be applied to the network device in the embodiments of the present application, and the computer program causes a computer to execute corresponding processes implemented by the network device in the methods in the embodiments of the present application, which are not described herein for brevity.

In some embodiments, the computer readable storage medium may be applied to the terminal device in the embodiments of the present application, and the computer program causes a computer to execute corresponding processes implemented by the terminal device in the methods in the embodiments of the present application, which are not described herein for brevity.

The embodiment of the application also provides a computer program product comprising computer program instructions.

In some embodiments, the computer program product may be applied to a network device in the embodiments of the present application, and the computer program instructions cause a computer to execute corresponding processes implemented by the network device in the methods in the embodiments of the present application, which are not described herein for brevity.

In some embodiments, the computer program product may be applied to a terminal device in the embodiments of the present application, and the computer program instructions cause a computer to execute corresponding processes implemented by the terminal device in the methods in the embodiments of the present application, which are not described herein for brevity.

The embodiment of the application also provides a computer program.

In some embodiments, the computer program may be applied to a network device in the embodiments of the present application, and when the computer program runs on a computer, the computer is caused to execute corresponding processes implemented by the network device in the methods in the embodiments of the present application, which are not described herein for brevity.

In some embodiments, the computer program may be applied to a terminal device in the embodiments of the present application, and when the computer program runs on a computer, the computer is caused to execute corresponding processes implemented by the terminal device in each method in the embodiments of the present application, which are not described herein for brevity.

Those of ordinary skill in the art will appreciate that the various illustrative 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 present application.

It will be clear to those skilled in the art that, for convenience and brevity of description, specific working procedures of the above-described systems, apparatuses and units 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 apparatus embodiments described above are merely illustrative, e.g., the division of the units is merely a logical function division, and there may be additional divisions when actually implemented, e.g., multiple units or components may be combined or integrated into another system, or some features may be omitted or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be an indirect coupling or communication connection via some interfaces, devices or units, which may be in electrical, mechanical or other form.

The units described as separate units may or may not be physically separate, and units shown as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

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

The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer-readable storage medium. For such understanding, the technical solution of the present application may be embodied essentially or in a part contributing to the prior art or in a part of the technical solution, in the form of a software product stored in a storage medium, comprising several instructions for causing a computer device (which may be a personal computer, a server, a network device, etc.) to perform all or part of the steps of the method according to the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a random access Memory (Random Access Memory, RAM), a magnetic disk, or an optical disk, or other various media capable of storing program codes.

The foregoing is merely illustrative of the present application, and the present application is not limited thereto, and any person skilled in the art will readily recognize that variations or substitutions are within the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

A method of wireless communication, comprising:

the terminal device determines an uplink channel for transmitting the target backscatter signal multiple times and/or the terminal device determines a set of time-frequency resources for transmitting the target backscatter signal multiple times.
The method of claim 1, wherein the terminal device determining an uplink channel for transmitting the target backscatter signal multiple times, comprises:

and the terminal equipment determines an uplink channel for transmitting the target backscatter signal for multiple times from M preset uplink channels for backscatter communication, wherein M is a positive integer, and M is more than or equal to 2.
The method as claimed in claim 2, wherein the terminal device determines an uplink channel for transmitting the target backscatter signal a plurality of times from among M uplink channels preset for backscatter communication, comprising:

And the terminal equipment determines an uplink channel for transmitting the target backscatter signal for multiple times from the M uplink channels according to a first preset rule.
The method of claim 3, wherein the first preset rule comprises one of:

the frequency of the uplink channel is in the order from low to high, and the frequency of the uplink channel is in the order from high to low, and the corresponding relation between the uplink channel and the transmission times is achieved.
A method according to any one of claims 2 to 4, wherein a plurality of terminal devices, including the terminal device, use the same one of the M uplink channels as an uplink channel for the primary backscatter signal.
The method of claim 5, wherein the plurality of terminal devices each use a different set of time-frequency resources on a same one of the M uplink channels as a set of time-frequency resources for the primary backscatter signal.
The method of claim 5 or 6, wherein,

the uplink channel used for the primary transmission of the target backscatter signal in the M uplink channels is pre-configured or agreed by a protocol, or the uplink channel used for the primary transmission of the target backscatter signal in the M uplink channels is indicated by a network device.
The method according to any one of claim 5 to 7,

the uplink channel with the channel identifier i in the M uplink channels is used for the ith transmission of the target backscatter signal, i is an integer, and i is more than or equal to 0 and less than or equal to M-1; wherein,

when i=0, an uplink channel with a channel identifier i in the M uplink channels is used for primary transmission of the target backscatter signal; and when i is more than or equal to 1, the uplink channel with the channel identifier i in the M uplink channels is used for the ith retransmission of the target backscatter signal.
The method according to any one of claim 5 to 7,

when the terminal equipment is an edge user, an uplink channel with a channel identifier of i+k in the M uplink channels is used for the ith transmission of the target backscatter signal, i is an integer, k is a positive integer, i is more than or equal to 0, and i+k is less than or equal to M-1; wherein,

when i=0, an uplink channel with a channel identifier k in the M uplink channels is used for primary transmission of the target backscatter signal;

and when i is more than or equal to 1, the uplink channel with the channel identifier of i+k in the M uplink channels is used for the ith retransmission of the target backscatter signal.
A method according to any one of claims 2 to 4, wherein a plurality of terminal devices, including the terminal device, use different ones of the M uplink channels as uplink channels for the primary backscatter signal.
The method of claim 10, wherein,

the uplink channel for primary transmission of the target backscatter signal in the M uplink channels is indicated by a network device; or,

and the uplink channel for the primary transmission of the target backscatter signal in the M uplink channels is determined for the terminal equipment.
The method of claim 10, wherein,

the uplink channel used for primary transmission of the target backscatter signal in the M uplink channels is determined by the terminal device according to the result of M modulo the partial bit in the identifier of the terminal device; or,

the uplink channel for primary transmission of the target backscatter signal in the M uplink channels is determined by the terminal device according to the received signal strength of the energy supply signal and/or the trigger signal; or,

and the uplink channel for primary transmission of the target backscatter signal in the M uplink channels is determined by the terminal equipment according to the self charging time.
The method according to any one of claim 10 to 12, wherein,

the uplink channel with the channel identifier j in the M uplink channels is used for the ith transmission of the target backscatter signal, the uplink channel with the channel identifier j+t in the M uplink channels is used for the ith+1th transmission of the target backscatter signal, i is an integer, t is a positive integer, and i is more than or equal to 0, and 0 is less than or equal to j+t is less than or equal to M-1.
The method of claim 2, wherein, in the case where the terminal device is an edge user, the upstream channel for the primary transmission of the target backscatter signal in the M upstream channels is an upstream channel whose average usage rate is lower than a first threshold value, or the upstream channel for the primary transmission of the target backscatter signal in the M upstream channels is one of at least one upstream channel for an edge user in the M upstream channels.
The method of any of claims 2 to 7, 10 to 12, wherein an uplink channel of the M uplink channels allows at least one transmission of the target backscatter signal.
The method of claim 15, wherein the maximum number of transmissions supported by each of the M uplink channels is pre-configured or agreed upon by a protocol, or wherein the maximum number of transmissions supported by each of the M uplink channels is configured by a network device.
The method of claim 15 or 16, wherein,

in case that each of the M uplink channels allows multiple transmissions of the target backscatter signal, a collision avoidance processing algorithm is allowed to be used superimposed on said each uplink channel.
The method according to claim 15 or 16, wherein superposition between different ones of the M uplink channels uses an anti-collision processing algorithm.
The method according to claim 17 or 18, wherein the anti-collision processing algorithm used by the uplink channels of the M uplink channels is indicated by the network device, or the anti-collision processing algorithm used by the uplink channels of the M uplink channels is pre-configured or agreed on, or the anti-collision processing algorithm used by the uplink channels of the M uplink channels is a fixed anti-collision algorithm.
The method of any one of claims 2 to 19, wherein the method further comprises:

and under the condition that the target back-scattered signal is required to be retransmitted after the uplink channel with the largest channel identifier in the M uplink channels is used, the terminal equipment continuously retransmits the target back-scattered signal by using the uplink channel with the largest channel identifier in the M uplink channels.
The method according to any one of claim 2 to 20,

the bandwidths of all the M uplink channels are equal; or,

The bandwidths of all the M uplink channels are not equal; or,

the bandwidths of part of the M uplink channels are not equal.
The method according to any one of claim 2 to 21,

the bandwidth of the upstream channel for the P-th transmission of the target backscatter signal is less than or equal to the bandwidth of the upstream channel for the Q-th transmission of the target backscatter signal, where P and Q are positive integers and P > Q.
The method of any one of claims 2 to 22, wherein the method further comprises:

in the process of switching the uplink channel for transmitting the target backscatter signal, the terminal device transmits the target backscatter signal using the uplink channel after switching after the first time domain offset.
The method of claim 23, wherein,

the first time domain offset is pre-configured or protocol agreed; alternatively, the first time domain offset is configured for the network device; or, the first time domain offset is a randomly selected one of S time domain offsets configured by the network device, and S is a positive integer; or under the condition that the network equipment is configured with S time domain offsets, the first time domain offset is determined by the terminal equipment according to the result of modulo S of part bits in the identification of the terminal equipment, and S is a positive integer.
The method according to any one of claims 2 to 24, wherein each of the M uplink channels is contiguous in the frequency domain or each of the M uplink channels is discontinuous in the frequency domain.
The method of claim 1, wherein the terminal device determining the set of time-frequency resources for transmitting the target backscatter signal multiple times, comprises:

the terminal equipment determines a time-frequency resource set for transmitting the target back-scattered signal for multiple times from N preset time-frequency resource sets for back-scattered communication, wherein N is a positive integer, and N is more than or equal to 2.
The method of claim 26, wherein,

the N time-frequency resource sets are preset time-frequency resource sets on at least one uplink channel for back scattering communication.
The method of claim 27, wherein,

the number of time-frequency resource sets on different uplink channels in the at least one uplink channel is the same, or the number of time-frequency resource sets on different uplink channels in the at least one uplink channel is different.
The method of any one of claim 26 to 28,

And the plurality of terminal devices use the same time-frequency resource set in the N time-frequency resource sets as the time-frequency resource set of the primary transmission back scattering signal, and the plurality of terminal devices comprise the terminal device.
The method of claim 29, wherein a set of time-frequency resources of the N sets of time-frequency resources for the initial transmission of the target backscatter signal is pre-configured or agreed upon, or wherein a set of time-frequency resources of the N sets of time-frequency resources for the initial transmission of the target backscatter signal is indicated by a network device.
The method of claim 29 or 30, wherein,

the time-frequency resource set with the index i of the time-frequency resource sets in the N time-frequency resource sets is used for the ith transmission of the target backscatter signal, i is an integer, and i is more than or equal to 0 and less than or equal to N-1;

when i=0, the time-frequency resource set with the index i of the time-frequency resource sets in the N time-frequency resource sets is used for primary transmission of the target backscatter signal; and when i is more than or equal to 1, the time-frequency resource set with the index of i in the time-frequency resource sets in the N time-frequency resource sets is used for the ith retransmission of the target backscatter signal.
The method of claim 29 or 30, wherein,

when the terminal equipment is an edge user, a time-frequency resource set with a time-frequency resource set index of i+k in the N time-frequency resource sets is used for the ith transmission of the target backscatter signal, i is an integer, k is a positive integer, i is more than or equal to 0, and i+k is less than or equal to N-1;

when i=0, the time-frequency resource set with the index k of the time-frequency resource sets in the N time-frequency resource sets is used for primary transmission of the target backscatter signal; and when i is more than or equal to 1, the time-frequency resource set with the index of i+k in the time-frequency resource sets in the N time-frequency resource sets is used for the ith retransmission of the target backscatter signal.
The method according to any of claims 26 to 28, wherein a plurality of terminal devices use different ones of the N sets of time-frequency resources as sets of time-frequency resources for the primary backscatter signal, the plurality of terminal devices comprising the terminal device.
The method of claim 33, wherein a set of time-frequency resources of the N sets of time-frequency resources for initial transmission of the target backscatter signal is indicated by a network device; or, the set of time-frequency resources used for the primary transmission of the target backscatter signal in the N sets of time-frequency resources is determined for the terminal device.
The method of claim 33, wherein,

the time-frequency resource set used for primary transmission of the target backscatter signal in the N time-frequency resource sets is determined by the terminal equipment according to the result of modulo N of partial bits in the identification of the terminal equipment; or,

the time-frequency resource set used for primary transmission of the target backscatter signal in the N time-frequency resource sets is determined by the terminal equipment according to the received signal strength of the energy supply signal and/or the trigger signal; or,

and the time-frequency resource set used for primary transmission of the target backscatter signal in the N time-frequency resource sets is determined by the terminal equipment according to the self charging time.
The method of any one of claim 33 to 35, wherein,

and the time-frequency resource set with the time-frequency resource set index of j in the N time-frequency resource sets is used for the ith transmission of the target back-scattered signal, the time-frequency resource set with the time-frequency resource set index of j+t in the N time-frequency resource sets is used for the ith transmission of the target back-scattered signal, i is an integer, t is a positive integer, i is more than or equal to 0, and 0 is less than or equal to j+t is less than or equal to N-1.
The method according to any of claims 26 to 28, wherein in case the terminal device is an edge user, the set of time-frequency resources of the N sets of time-frequency resources for the initial transmission of the target backscatter signal is a set of time-frequency resources with an average usage below a second threshold, or the set of time-frequency resources of the N sets of time-frequency resources for the initial transmission of the target backscatter signal is one of at least one set of time-frequency resources of the N sets of time-frequency resources for an edge user.
The method of any of claims 26 to 30, 33 to 35, wherein a set of time-frequency resources of the N sets of time-frequency resources allows for at least one transmission of the target backscatter signal.
The method of claim 38, wherein a maximum number of transmissions supported by each of the N sets of time-frequency resources is pre-configured or agreed upon by a protocol, or wherein a maximum number of transmissions supported by each of the N sets of time-frequency resources is configured by a network device.
The method of claim 38 or 39, wherein,

And in the case that each of the N sets of time-frequency resources allows multiple transmissions of the target backscatter signal, allowing the anti-collision processing algorithm to be used in superposition on each set of time-frequency resources.
The method of claim 38 or 39, wherein overlapping between different ones of the N sets of time-frequency resources uses an anti-collision processing algorithm.
The method of claim 40 or 41, wherein the anti-collision processing algorithm used by the time-frequency resource sets in the N time-frequency resource sets is indicated by a network device, or the anti-collision processing algorithm used by the time-frequency resource sets in the N time-frequency resource sets is pre-configured or agreed by a protocol, or the anti-collision processing algorithm used by the time-frequency resource sets in the N time-frequency resource sets is a fixed anti-collision algorithm.
The method of any one of claims 26 to 42, further comprising:

and under the condition that the target back scattering signal is required to be retransmitted after the time-frequency resource set with the largest time-frequency resource set index in the N time-frequency resource sets is used, the terminal equipment continuously uses the time-frequency resource set with the largest time-frequency resource set index in the N time-frequency resource sets to retransmit the target back scattering signal.
The method of any one of claim 26 to 43,

the resources occupied by each time-frequency resource set in the N time-frequency resource sets are equally divided; or,

the resources occupied by each of the N sets of time-frequency resources are unequal.
The method of claim 44, wherein,

under the condition that the resources occupied by each time-frequency resource set in the N time-frequency resource sets are unequal, the resources occupied by the time-frequency resource set with the index of p are smaller than the resources occupied by the time-frequency resource set with the index of q, wherein p and q are positive integers, and p is more than q;

or,

and under the condition that the resources occupied by each time-frequency resource set in the N time-frequency resource sets are unequal, the resources occupied by the time-frequency resource sets in the N time-frequency resource sets gradually decrease along with the increase of the index, or the resources occupied by the time-frequency resource sets in the N time-frequency resource sets gradually decrease along with the increase of the index.
The method of any one of claims 26 to 45, further comprising:

in the process of switching the set of time-frequency resources used for transmitting the target backscatter signal, the terminal device transmits the target backscatter signal using the set of time-frequency resources after switching after the second time-domain offset.
The method of claim 46, wherein,

the second time domain offset is pre-configured or protocol agreed; alternatively, the second time domain offset is configured for the network device; or, the second time domain offset is a randomly selected time domain offset in the S time domain offsets configured by the network equipment, and S is a positive integer; or under the condition that the network equipment is configured with S time domain offsets, the second time domain offset is determined by the terminal equipment according to the result of modulo S of partial bits in the identification of the terminal equipment, and S is a positive integer.
The method of any one of claims 26 to 47, wherein each of the N sets of time-frequency resources is contiguous in the frequency domain, or wherein each of the N sets of time-frequency resources is discontinuous in the frequency domain.
The method of any one of claims 1 to 22, 26 to 45, further comprising:

after the R-th transmission of the target backscatter signal, the terminal device performs an r+1th transmission of the target backscatter signal after a third time domain offset, where R is a positive integer.
The method of claim 49, wherein,

The third time domain offset is pre-configured or protocol agreed; alternatively, the third time domain offset is configured for the network device; or, the third time domain offset is a randomly selected time domain offset in the S time domain offsets configured by the network equipment, and S is a positive integer; or under the condition that the network equipment is configured with S time domain offsets, the third time domain offset is determined by the terminal equipment according to the result of modulo S of partial bits in the identification of the terminal equipment, and S is a positive integer.
A terminal device, comprising: a processing unit, wherein,

the processing unit is configured to determine an uplink channel for transmitting the target backscatter signal multiple times, and/or the processing unit is configured to determine a set of time-frequency resources for transmitting the target backscatter signal multiple times.
The terminal device of claim 51, wherein the processing unit is specifically configured to:

and determining an uplink channel for transmitting the target backscatter signal for multiple times from M preset uplink channels for backscatter communication, wherein M is a positive integer, and M is more than or equal to 2.
The terminal device of claim 52, wherein the processing unit is specifically configured to:

And determining an uplink channel for transmitting the target backscatter signal for multiple times from the M uplink channels according to a first preset rule.
The terminal device of claim 53, wherein the first preset rule comprises one of:

the frequency of the uplink channel is in the order from low to high, and the frequency of the uplink channel is in the order from high to low, and the corresponding relation between the uplink channel and the transmission times is achieved.
A terminal device as claimed in any one of claims 52 to 54, wherein a plurality of terminal devices use the same one of the M uplink channels as an uplink channel for the primary backscatter signal, the plurality of terminal devices comprising the terminal device.
The terminal device of claim 55, wherein the plurality of terminal devices each use a different set of time-frequency resources on a same one of the M uplink channels as the set of time-frequency resources for the primary backscatter signal.
The terminal device of claim 55 or 56, wherein,

the uplink channel used for the primary transmission of the target backscatter signal in the M uplink channels is pre-configured or agreed by a protocol, or the uplink channel used for the primary transmission of the target backscatter signal in the M uplink channels is indicated by a network device.
The terminal device of any of claims 55 to 57,

the uplink channel with the channel identifier i in the M uplink channels is used for the ith transmission of the target backscatter signal, i is an integer, and i is more than or equal to 0 and less than or equal to M-1; wherein,

when i=0, an uplink channel with a channel identifier i in the M uplink channels is used for primary transmission of the target backscatter signal; and when i is more than or equal to 1, the uplink channel with the channel identifier i in the M uplink channels is used for the ith retransmission of the target backscatter signal.
The terminal device of any of claims 55 to 57,

when the terminal equipment is an edge user, an uplink channel with a channel identifier of i+k in the M uplink channels is used for the ith transmission of the target backscatter signal, i is an integer, k is a positive integer, i is more than or equal to 0, and i+k is less than or equal to M-1; wherein,

when i=0, an uplink channel with a channel identifier k in the M uplink channels is used for primary transmission of the target backscatter signal;

and when i is more than or equal to 1, the uplink channel with the channel identifier of i+k in the M uplink channels is used for the ith retransmission of the target backscatter signal.
A terminal device according to any of claims 52 to 54, wherein a plurality of terminal devices use different ones of said M uplink channels as uplink channels for the primary backscatter signal, said plurality of terminal devices comprising said terminal device.
The terminal device of claim 60, wherein,

the uplink channel for primary transmission of the target backscatter signal in the M uplink channels is indicated by a network device; or,

and the uplink channel for the primary transmission of the target backscatter signal in the M uplink channels is determined for the terminal equipment.
The terminal device of claim 60, wherein,

the uplink channel used for primary transmission of the target backscatter signal in the M uplink channels is determined by the terminal device according to the result of M modulo the partial bit in the identifier of the terminal device; or,

the uplink channel for primary transmission of the target backscatter signal in the M uplink channels is determined by the terminal device according to the received signal strength of the energy supply signal and/or the trigger signal; or,

and the uplink channel for primary transmission of the target backscatter signal in the M uplink channels is determined by the terminal equipment according to the self charging time.
The terminal device according to any of the claims 60 to 62, characterized in that,

the uplink channel with the channel identifier j in the M uplink channels is used for the ith transmission of the target backscatter signal, the uplink channel with the channel identifier j+t in the M uplink channels is used for the ith+1th transmission of the target backscatter signal, i is an integer, t is a positive integer, and i is more than or equal to 0, and 0 is less than or equal to j+t is less than or equal to M-1.
The terminal device of claim 52, wherein, in the case where the terminal device is an edge user, the upstream channel of the M upstream channels for the primary transmission of the target backscatter signal is an upstream channel having an average utilization rate below a first threshold, or wherein the upstream channel of the M upstream channels for the primary transmission of the target backscatter signal is one of at least one upstream channel of the M upstream channels for an edge user.
A terminal device as claimed in any of claims 52 to 57, 60 to 62, wherein an uplink channel of said M uplink channels allows for at least one transmission of said target backscatter signal.
The terminal device of claim 65, wherein the maximum number of transmissions supported by each of the M uplink channels is pre-configured or agreed upon by a protocol, or wherein the maximum number of transmissions supported by each of the M uplink channels is configured by a network device.
The terminal device of claim 65 or 66, wherein,

in case that each of the M uplink channels allows multiple transmissions of the target backscatter signal, a collision avoidance processing algorithm is allowed to be used superimposed on said each uplink channel.
The terminal device of claim 65 or 66, wherein superposition between different ones of the M uplink channels uses an anti-collision processing algorithm.
The terminal device of claim 67 or 68, wherein the anti-collision processing algorithm used by an uplink channel of the M uplink channels is indicated by the network device, or wherein the anti-collision processing algorithm used by an uplink channel of the M uplink channels is pre-configured or agreed upon, or wherein the anti-collision processing algorithm used by an uplink channel of the M uplink channels is a fixed anti-collision algorithm.
The terminal device of any of claims 52 to 69,

the terminal device further includes: a communication unit, wherein,

and the communication unit is used for continuously retransmitting the target back-scattered signal by using the uplink channel with the largest channel identifier in the M uplink channels under the condition that the target back-scattered signal is required to be retransmitted after the uplink channel with the largest channel identifier in the M uplink channels is used.
The terminal device according to any of the claims 52 to 70, characterized in that,

the bandwidths of all the M uplink channels are equal; or,

the bandwidths of all the M uplink channels are not equal; or,

the bandwidths of part of the M uplink channels are not equal.
The terminal device according to any of the claims 52 to 71, characterized in that,

the bandwidth of the upstream channel for the P-th transmission of the target backscatter signal is less than or equal to the bandwidth of the upstream channel for the Q-th transmission of the target backscatter signal, where P and Q are positive integers and P > Q.
The terminal device of any of claims 52 to 72,

the terminal device further includes: a communication unit, wherein,

in switching an uplink channel for transmitting the target backscatter signal, the communication element is configured to transmit the target backscatter signal using the uplink channel after switching after a first time domain offset.
The terminal device of claim 73, wherein,

the first time domain offset is pre-configured or protocol agreed; alternatively, the first time domain offset is configured for the network device; or, the first time domain offset is a randomly selected one of S time domain offsets configured by the network device, and S is a positive integer; or under the condition that the network equipment is configured with S time domain offsets, the first time domain offset is determined by the terminal equipment according to the result of modulo S of part bits in the identification of the terminal equipment, and S is a positive integer.
A terminal device as claimed in any one of claims 52 to 74, wherein each of the M uplink channels is contiguous in the frequency domain or each of the M uplink channels is discontinuous in the frequency domain.
The terminal device of claim 51, wherein the processing unit is specifically configured to:

and determining a time-frequency resource set for transmitting the target back-scattered signal for multiple times from N preset time-frequency resource sets for back-scattered communication, wherein N is a positive integer, and N is more than or equal to 2.
The terminal device of claim 76, wherein,

the N time-frequency resource sets are preset time-frequency resource sets on at least one uplink channel for back scattering communication.
The terminal device of claim 77,

the number of time-frequency resource sets on different uplink channels in the at least one uplink channel is the same, or the number of time-frequency resource sets on different uplink channels in the at least one uplink channel is different.
The terminal device of any of claims 76 to 78,

and the plurality of terminal devices use the same time-frequency resource set in the N time-frequency resource sets as the time-frequency resource set of the primary transmission back scattering signal, and the plurality of terminal devices comprise the terminal device.
The terminal device of claim 79, wherein a set of time-frequency resources of the N sets of time-frequency resources for the initial transmission of the target backscatter signal is pre-configured or agreed upon by a protocol, or wherein a set of time-frequency resources of the N sets of time-frequency resources for the initial transmission of the target backscatter signal is indicated by a network device.
The terminal device of claim 79 or 80,

the time-frequency resource set with the index i of the time-frequency resource sets in the N time-frequency resource sets is used for the ith transmission of the target backscatter signal, i is an integer, and i is more than or equal to 0 and less than or equal to N-1;

when i=0, the time-frequency resource set with the index i of the time-frequency resource sets in the N time-frequency resource sets is used for primary transmission of the target backscatter signal; and when i is more than or equal to 1, the time-frequency resource set with the index of i in the time-frequency resource sets in the N time-frequency resource sets is used for the ith retransmission of the target backscatter signal.
The terminal device of claim 79 or 80,

when the terminal equipment is an edge user, a time-frequency resource set with a time-frequency resource set index of i+k in the N time-frequency resource sets is used for the ith transmission of the target backscatter signal, i is an integer, k is a positive integer, i is more than or equal to 0, and i+k is less than or equal to N-1;

When i=0, the time-frequency resource set with the index k of the time-frequency resource sets in the N time-frequency resource sets is used for primary transmission of the target backscatter signal; and when i is more than or equal to 1, the time-frequency resource set with the index of i+k in the time-frequency resource sets in the N time-frequency resource sets is used for the ith retransmission of the target backscatter signal.
The terminal device of any of claims 76-78, wherein a plurality of terminal devices use different ones of the N sets of time-frequency resources as sets of time-frequency resources for the primary backscatter signal, the plurality of terminal devices comprising the terminal device.
The terminal device of claim 83, wherein a set of time-frequency resources of the N sets of time-frequency resources for initial transmission of the target backscatter signal is indicated by a network device; or, the set of time-frequency resources used for the primary transmission of the target backscatter signal in the N sets of time-frequency resources is determined for the terminal device.
The terminal device of claim 83, wherein,

the time-frequency resource set used for primary transmission of the target backscatter signal in the N time-frequency resource sets is determined by the terminal equipment according to the result of modulo N of partial bits in the identification of the terminal equipment; or,

The time-frequency resource set used for primary transmission of the target backscatter signal in the N time-frequency resource sets is determined by the terminal equipment according to the received signal strength of the energy supply signal and/or the trigger signal; or,

and the time-frequency resource set used for primary transmission of the target backscatter signal in the N time-frequency resource sets is determined by the terminal equipment according to the self charging time.
The terminal device according to any of the claims 83 to 85, characterized in that,

and the time-frequency resource set with the time-frequency resource set index of j in the N time-frequency resource sets is used for the ith transmission of the target back-scattered signal, the time-frequency resource set with the time-frequency resource set index of j+t in the N time-frequency resource sets is used for the ith transmission of the target back-scattered signal, i is an integer, t is a positive integer, i is more than or equal to 0, and 0 is less than or equal to j+t is less than or equal to N-1.
The terminal device of any of claims 76 to 78,

and when the terminal equipment is an edge user, the time-frequency resource set used for the primary transmission of the target back-scattering signal in the N time-frequency resource sets is a time-frequency resource set with average use rate lower than a second threshold value, or the time-frequency resource set used for the primary transmission of the target back-scattering signal in the N time-frequency resource sets is one time-frequency resource set in at least one time-frequency resource set used for the edge user in the N time-frequency resource sets.
The terminal device according to any of the claims 76 to 80, 83 to 85, wherein a set of time-frequency resources of said N sets of time-frequency resources allows at least one transmission of said target backscatter signal.
The terminal device of claim 88, wherein a maximum number of transmissions supported by each of the N sets of time-frequency resources is pre-configured or agreed upon by a protocol, or wherein a maximum number of transmissions supported by each of the N sets of time-frequency resources is configured by a network device.
The terminal device of claim 88 or 89, wherein,

and in the case that each of the N sets of time-frequency resources allows multiple transmissions of the target backscatter signal, allowing the anti-collision processing algorithm to be used in superposition on each set of time-frequency resources.
The terminal device of claim 88 or 89, wherein overlapping between different ones of the N sets of time-frequency resources uses an anti-collision processing algorithm.
The terminal device of claim 90 or 91, wherein the anti-collision processing algorithm used by the time-frequency resource sets in the N time-frequency resource sets is indicated by the network device, or the anti-collision processing algorithm used by the time-frequency resource sets in the N time-frequency resource sets is pre-configured or agreed by a protocol, or the anti-collision processing algorithm used by the time-frequency resource sets in the N time-frequency resource sets is a fixed anti-collision algorithm.
The terminal device of any of claims 76 to 92,

the terminal device further includes: a communication unit, wherein,

and when the target back-scattered signal also needs to be retransmitted after the time-frequency resource set with the largest time-frequency resource set index in the N time-frequency resource sets is used, the communication unit is used for continuously retransmitting the target back-scattered signal by using the time-frequency resource set with the largest time-frequency resource set index in the N time-frequency resource sets.
The terminal device of any of claims 76 to 93,

the resources occupied by each time-frequency resource set in the N time-frequency resource sets are equally divided; or,

the resources occupied by each of the N sets of time-frequency resources are unequal.
The terminal device of claim 94, wherein,

under the condition that the resources occupied by each time-frequency resource set in the N time-frequency resource sets are unequal, the resources occupied by the time-frequency resource set with the index of p are smaller than the resources occupied by the time-frequency resource set with the index of q, wherein p and q are positive integers, and p is more than q;

Or,

and under the condition that the resources occupied by each time-frequency resource set in the N time-frequency resource sets are unequal, the resources occupied by the time-frequency resource sets in the N time-frequency resource sets gradually decrease along with the increase of the index, or the resources occupied by the time-frequency resource sets in the N time-frequency resource sets gradually decrease along with the increase of the index.
The terminal device according to any of the claims 76 to 95, characterized in that,

the terminal device further includes: a communication unit, wherein,

in switching the set of time-frequency resources used for transmitting the target backscatter signal, the communication element is configured to transmit the target backscatter signal using the set of time-frequency resources after the switch after the second time-domain offset.
The terminal device of claim 96, wherein,

the second time domain offset is pre-configured or protocol agreed; alternatively, the second time domain offset is configured for the network device; or, the second time domain offset is a randomly selected time domain offset in the S time domain offsets configured by the network equipment, and S is a positive integer; or under the condition that the network equipment is configured with S time domain offsets, the second time domain offset is determined by the terminal equipment according to the result of modulo S of partial bits in the identification of the terminal equipment, and S is a positive integer.
The terminal device of any of claims 76 to 97, wherein each of the N sets of time-frequency resources is contiguous in the frequency domain, or wherein each of the N sets of time-frequency resources is discontinuous in the frequency domain.
The terminal device according to any of the claims 51 to 72, 76 to 95,

the terminal device further includes: a communication unit, wherein,

after the R-th transmission of the target backscatter signal, the communication element is configured to perform an r+1th transmission of the target backscatter signal after a third time domain offset, R being a positive integer.
The terminal device of claim 99, wherein,

the third time domain offset is pre-configured or protocol agreed; alternatively, the third time domain offset is configured for the network device; or, the third time domain offset is a randomly selected time domain offset in the S time domain offsets configured by the network equipment, and S is a positive integer; or under the condition that the network equipment is configured with S time domain offsets, the third time domain offset is determined by the terminal equipment according to the result of modulo S of partial bits in the identification of the terminal equipment, and S is a positive integer.
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, performing the method of any of claims 1 to 50.
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 50.
A computer readable storage medium storing a computer program for causing a computer to perform the method of any one of claims 1 to 50.
A computer program product comprising computer program instructions for causing a computer to perform the method of any one of claims 1 to 50.
A computer program, characterized in that the computer program causes a computer to perform the method of any one of claims 1 to 50.