CN117178577A

CN117178577A - Wireless communication method, first device and second device

Info

Publication number: CN117178577A
Application number: CN202180097235.5A
Authority: CN
Inventors: 贺传峰; 徐伟杰; 张治�
Original assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Current assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority date: 2021-07-20
Filing date: 2021-07-20
Publication date: 2023-12-05
Also published as: WO2023000175A1

Abstract

The embodiment of the application provides a wireless communication method, a first device and a second device, wherein the method comprises the following steps: receiving a pilot signal by at least one of: an energizing signal, a triggering signal, or a backscatter signal. In the present application, a pilot signal is received by at least one of the following signals: the energy supply signal, the trigger signal or the back scattering signal is favorable for carrying out channel estimation based on the pilot signal and demodulating the uplink signal or the downlink signal based on a channel estimation result, namely, the receiving performance and the coverage area of the signal can be improved.

Description

Wireless communication method, first device and second device

Technical Field

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

Background

And when the semi-passive zero-power-consumption terminal is far away from the network node, the charging efficiency is greatly reduced. The energy collected in real time cannot meet the instant communication requirement, namely, the energy is required to be collected and stored before communication. Therefore, how to improve the signal receiving performance and coverage area for this type of terminal is a technical problem that needs to be solved in the art.

Disclosure of Invention

The embodiment of the application provides a wireless communication method, first equipment and second equipment, which can improve the signal receiving performance and coverage area.

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

receiving a pilot signal by at least one of: an energizing signal, a triggering signal, or a backscatter signal.

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

transmitting a pilot signal by at least one of: an energizing signal, a triggering signal, or a backscatter signal.

In a third aspect, the present application provides a first apparatus for performing the method of the first aspect or implementations thereof. In particular, the first device comprises functional modules for performing the method of the first aspect or implementations thereof.

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

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

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

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

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

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

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

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

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

In a sixth aspect, the present application provides a second device comprising a processor and a memory. The memory is used for storing a computer program, and the processor is used for calling and running the computer program stored in the memory to execute the method in the second aspect or various implementation manners thereof.

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

In a seventh aspect, the present application provides a chip for implementing the method in any one of the first to second aspects or each implementation thereof. Specifically, the chip includes: a processor for calling and running a computer program from a memory, causing a device on which the chip is mounted to perform the method as in any one of the first to second aspects or implementations thereof described above.

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

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

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

In the present application, a pilot signal is received by at least one of the following signals: the energy supply signal, the trigger signal or the back scattering signal is favorable for carrying out channel estimation based on the pilot signal and demodulating the uplink signal or the downlink signal based on a channel estimation result, namely, the receiving performance and the coverage area of the signal can be improved.

Drawings

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

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

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

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

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

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

Fig. 7 is an example of a pilot signal provided by an embodiment of the present application as an unmodulated carrier signal.

Fig. 8 is an example of a periodic pilot signal provided by an embodiment of the present application.

Fig. 9 is an example in which pilot signals and carrier signals for carrying user information provided by an embodiment of the present application are two frequency division carriers.

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

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

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

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

Detailed Description

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

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

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

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

The cellular internet of things is a development product of combining a cellular mobile communication network with the internet of things. The cellular passive internet of things, also referred to as passive cellular internet of things, is a combination of a network Device and a passive terminal, where in the cellular passive internet of things, the passive terminal may communicate with other passive terminals through the network Device, or the passive terminal may communicate in a Device-to-Device (D2D) communication manner, and the network Device only needs to send a carrier signal, that is, an energy supply signal, to supply energy to the passive terminal.

Generally, the number of connections supported by the conventional communication system is limited and easy to implement, however, as the communication technology advances, the mobile communication system will support not only conventional communication but also, for example, D2D communication, machine-to-machine (Machine to Machine, M2M) communication, machine type communication (Machine Type Communication, MTC), and inter-vehicle (Vehicle to Vehicle, V2V) communication, etc., and the embodiments of the present application can also be applied to these communication systems.

Optionally, the communication system in the embodiment of the present application may be applied to a carrier aggregation (Carrier Aggregation, CA) scenario, a dual connectivity (Dual Connectivity, DC) scenario, or a Stand Alone (SA) fabric scenario.

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

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

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

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

It should be understood that a device having a communication function in a network/system according to an embodiment of the present application may be referred to as a communication device. Taking the communication system 100 shown in fig. 1 as an example, the communication device may include a network device 110 and a terminal device 120 with communication functions, where the network device 110 and the terminal device 120 may be specific devices described above, and are not described herein again; the communication device may also include other devices in the communication system 100, such as a network controller, a mobility management entity, and other network entities, which are not limited in this embodiment of the present application.

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

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

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

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

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

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

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

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

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

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

1. Energy harvesting (RF Power Harvesting).

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

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

2. Backscatter communication (Back Scattering).

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

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

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

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

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

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

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

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

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

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

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

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

1. Passive zero power consumption terminals.

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

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

2. A semi-passive zero power terminal.

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

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

3. An active zero power terminal.

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

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

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

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

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

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

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

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

For example, a zero power consumption terminal may perform backscatter communications based on a received trigger signal. Alternatively, the trigger signal may be used to schedule or trigger zero power consumption terminal backscatter communications. Optionally, the trigger signal carries scheduling information of the network device, or the trigger signal is a scheduling signaling or a scheduling signal sent by the network device.

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

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

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

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

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

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

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

It should be noted that the performance of a wireless communication system is greatly affected by a wireless channel, such as shadow fading and frequency selective fading, so that a propagation path between a transmitter and a receiver is very complex. Wireless channels are not fixed and predictable as wired channels, but rather have a large randomness, which presents a significant challenge to the design of the receiver. Channel estimation techniques are widely employed in wireless communication systems. The implementation of the channel estimation technique requires knowledge of the information of the wireless channel, such as the channel's order, doppler shift and multipath delay or the channel's impulse response. Channel parameter estimation is therefore a key technology for implementing wireless communication systems. Whether detailed channel information can be obtained, so that a transmitted signal is correctly demodulated at a receiving end, is an important indicator for measuring performance of a wireless communication system.

From the perspective of channel estimation algorithm prior information, the following three categories can be classified:

1. based on an estimate of the reference signal.

By inserting known pilot symbols into the transmitted useful data, a channel estimation result of the pilot position can be obtained; and obtaining a channel estimation result of the useful data position by interpolation by utilizing the channel estimation result of the pilot frequency position, and completing channel estimation. It is characterized by the need to resort to reference signals, such as pilot signals.

2. Blind estimation.

The channel estimation is performed by utilizing some characteristics inherent to the modulated signal and independent of specific bearing information bits, or by adopting a decision feedback method.

3. Semi-blind estimation.

The channel estimation method combines the advantages of the blind estimation method and the pilot frequency estimation method.

In addition, in the RFID technology, the modulation mode of the reader/writer is mainly Amplitude Shift Keying (ASK), for example, double-sideband amplitude shift keying (double-sideband amplitude shift keying, DSB-ASK), single-sideband amplitude shift keying (SSB-ASK) or inverse-phase amplitude shift keying (phase-reversal amplitude shift keying, PR-ASK). ASK modulation facilitates simple signal envelope detection by zero power consumption devices to obtain information. The zero power device supports ASK and or Phase Shift Keying (PSK) modulation, the modulation scheme being selected by the manufacturer of the zero power device. The reader/writer will demodulate both modulation types. Because the communication distance of the zero-power-consumption device is short and the data rate is limited, the RFID system does not need to perform channel estimation at the receiving end. However, in the deployment scenario of cellular passive internet of things, the need for zero power consumption devices satisfies a certain coverage, typically several tens of meters or even hundreds of meters. And, zero power devices will also have higher requirements on data rate. At this time, the influence of the wireless channel on the signal cannot be ignored, and the signal receiving performance needs to be improved through channel estimation, so that the system performance of the cellular passive internet of things is improved.

In other words, the charging efficiency of the semi-passive zero-power-consumption terminal is greatly reduced when the terminal is far away from the network node. The energy collected in real time cannot meet the instant communication requirement, namely, the energy is required to be collected and stored before communication. Therefore, for this type of terminal, the influence of the wireless channel on the signal can be considered to improve the receiving performance and coverage area of the signal.

Based on the above, the embodiment of the application provides a wireless communication method, a first device and a second device, which can improve the receiving performance and coverage area of a signal by considering the influence of a wireless channel on the signal.

Fig. 6 is a schematic flow chart of a wireless communication method 200 provided by an embodiment of the present application. The method 200 may be interactively performed by a first device and a second device. For example, the method 200 may be applicable to uplink transmission, the first device may be a network device, and the second device may be a terminal device. For another example, the method 200 may be applicable to downlink transmission, where the first device may be a terminal device and the second device may be a network device. The terminal device may be the terminal device 120 shown in fig. 1, or may be a zero-power terminal. The network device may be network device 110 as shown in fig. 1.

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

s210, receiving a pilot signal through at least one of the following signals: an energizing signal, a triggering signal, or a backscatter signal.

In this embodiment, the pilot signal is received by at least one of the following signals: the energy supply signal, the trigger signal or the back scattering signal is favorable for carrying out channel estimation based on the pilot signal and demodulating the uplink signal or the downlink signal based on a channel estimation result, namely, the receiving performance and the coverage area of the signal can be improved.

In some embodiments, the transmission resource corresponding to the pilot signal includes a transmission resource corresponding to each of at least one modulation scheme, where the at least one modulation scheme includes a modulation scheme supported by the terminal device.

Specifically, for RFID systems, the reader-writer typically employs ASK modulation, and the zero-power terminals may employ ASK or PSK modulation. In the zero-power consumption communication system, the terminal device can support more modulation modes than the RFID system so as to transmit and receive transmission signals. The requirements for channel estimation may be different for different modulation schemes, i.e. the number and/or location of the transmission resources may be different for pilot signals corresponding to different modulation schemes. ASK modulation, for example, is highly affected by channel fading and requires high channel estimation. Under the same output power and channel noise conditions, the degradation of the demodulation performance of ASK with the decrease of the signal-to-noise ratio is serious compared with PSK modulation, and the anti-fading capability is not strong.

The term correspondence in the present application may mean that there is a direct correspondence or an indirect correspondence between the terms, or may mean that there is an association between the terms, or may mean that there is a relationship between an instruction and an instruction, or between an arrangement and an arrangement. The term indication may be a direct indication, an indirect indication, or an indication having an association relationship. For example, a indicates B, which may mean that a indicates B directly, e.g., B may be obtained by a; it may also indicate that a indicates B indirectly, e.g. a indicates C, B may be obtained by C; it may also be indicated that there is an association between a and B.

In some embodiments, the transmission resources corresponding to the pilot signals include time domain resources and/or frequency domain resources.

Alternatively, the time domain resource may include at least one time unit.

Alternatively, the frequency domain resource may include at least one RB.

In some embodiments, the pilot signal is a downlink signal, the pilot signal being carried in the energizing signal and/or the triggering signal.

In other words, the terminal device receives the pilot signal sent by the network device and performs channel estimation based on the pilot signal; the terminal device may then demodulate the received signal based on the channel estimation result.

Alternatively, the pilot signal is an unmodulated carrier signal, or the pilot signal is a carrier signal modulated based on known information.

In some embodiments, the pilot signal is an uplink signal, the pilot signal being carried in the backscatter signal.

In other words, the network device receives the pilot signal sent by the terminal device, and performs channel estimation based on the pilot signal; the network device may then demodulate the received signal based on the channel estimation result.

Optionally, the pilot signal is a load modulated signal in the back-scattered signal or the pilot signal is an unmodulated signal in the back-scattered signal.

In some embodiments, the pilot signal is a periodically transmitted signal; the transmission resources corresponding to the pilot signals are configured through first configuration information, the first configuration information comprises at least one resource configuration information, and the at least one resource configuration information is respectively used for configuring the transmission resources corresponding to the at least one modulation mode for the pilot signals.

In other words, when the pilot signal is a periodic signal, the transmission resources corresponding to the pilot signal may include transmission resources corresponding to the at least one modulation scheme for transmitting the pilot signal, where the transmission resources corresponding to the at least one modulation scheme for transmitting the pilot signal may be resources configured by the network device.

Of course, in other alternative embodiments, the transmission resource corresponding to the at least one modulation mode and used for transmitting the pilot signal may also be a predefined resource, which is not limited in particular by the embodiment of the present application. It should be noted that, in the embodiment of the present application, the "predefining" 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 preset, may refer to what is defined in the protocol. Alternatively, the "protocol" may refer to a standard protocol in the communication field, and may include, for example, an LTE protocol, an NR protocol, and related protocols applied to a future communication system, which is not particularly limited by the present application.

Alternatively, the first configuration information may be semi-static configuration information or dynamic configuration information.

Optionally, the pilot signal is periodically carried in the energizing signal.

Optionally, the at least one resource configuration information corresponds to the at least one modulation mode one by one.

Optionally, the number of resources and/or the time domain length of the transmission resources configured by different resource configuration information in the at least one resource configuration information are different.

Optionally, the first configuration information includes at least one of:

the type of the pilot signal;

a period of the pilot signal;

a time offset of the pilot signal;

the length of the occupied time unit of the pilot signal;

the frequency of the carrier signal where the pilot signal is located; or (b)

And the sub-channel number of the sub-channel where the pilot signal is located.

Optionally, the type of the pilot signal includes at least one of:

an unmodulated carrier signal, a carrier signal modulated based on known information, a load modulated signal, or an unmodulated signal.

In some embodiments, the pilot signal is a non-periodically transmitted signal; the transmission resources corresponding to the pilot signals are resources configured through second configuration information, the second configuration information is used for configuring at least one pattern, and the at least one pattern is used for representing the transmission resources corresponding to the at least one modulation mode and used for transmitting the pilot signals.

In other words, when the pilot signal is an aperiodic signal, the transmission resources corresponding to the pilot signal may include transmission resources corresponding to the at least one modulation scheme for transmitting the pilot signal, where the transmission resources corresponding to the at least one modulation scheme for transmitting the pilot signal may be resources configured by a network device.

Of course, in other alternative embodiments, the transmission resource corresponding to the at least one modulation mode and used for transmitting the pilot signal may also be a predefined resource, which is not limited in particular by the embodiment of the present application.

Alternatively, the second configuration information may be semi-static configuration information or dynamic configuration information.

Optionally, each pattern of the at least one pattern is used to characterize a time unit occupied by the pilot signal in a first time range, the first time range including a time unit for carrying data and a time unit for carrying the pilot signal.

Optionally, the time units occupied by the pilot signal in the first time range include the first n time units of the first time range, where n is a positive integer.

Of course, in other alternative embodiments, the time units occupied by the pilot signal in the first time range are the last n time units in the first time range or n time units located in the middle position, where the value of n is not specifically limited in the embodiments of the present application, and n may alternatively be indicated by a network device, may also be determined by a terminal device, or may also be predefined, and the embodiments of the present application are not specifically limited in this regard.

Optionally, the at least one pattern corresponds to the at least one modulation mode one by one.

Optionally, the number of resources and/or the time domain length of the transmission resources corresponding to different patterns in the at least one pattern are different.

Optionally, the number of resources includes RB number.

Alternatively, the time domain length may be expressed as the number of time units.

Optionally, the second configuration information includes at least one of:

the type of the pilot signal;

the frequency of the carrier signal where the pilot signal is located; or (b)

Optionally, the type of the pilot signal includes at least one of:

In some embodiments, the method 200 may further comprise:

performing channel estimation based on the pilot signal to obtain a channel estimation result;

and demodulating the received signal based on the channel estimation result.

In other words, the terminal device or the network device may demodulate the received signal based on the channel estimation result.

In some embodiments, the pilot signal is a reference signal.

Alternatively, the reference signal may be an uplink reference signal or a downlink reference signal.

Alternatively, the reference signals may include demodulation reference signals (Demodulation Reference Signal, DMRS), sounding reference signals (Sounding Reference Signal, SRS), phase tracking reference signals (PT-RS), and the like. The DMRS may be used for demodulation of a channel, the SRS may be used for measurement of a channel, time-frequency synchronization or phase tracking, and the PT-RS may also be used for measurement of a channel, time-frequency synchronization or phase tracking.

The following describes aspects of the application in connection with specific embodiments.

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

For a single-path rayleigh channel, the channel model is y=hx+n, where X is the transmit signal, Y is the receive signal, H is the multiplicative channel, and n is gaussian white noise. The pilot signal is typically a known signal X transmitted from the transmitting end, and H can be obtained from Y obtained from the receiving end. For signal reception, the transmitted signal X can be recovered according to the channel estimation H and the received signal Y, thereby achieving the purpose of communication.

Example 1:

in this embodiment, the network device may send a downlink pilot signal to the terminal device, so that the terminal device demodulates the downlink signal based on the downlink pilot signal, for example, an energy supply signal may be used to carry the downlink pilot signal.

For transmission of downlink signals, the network device may send control information or data to the terminal. For example, like RFID technology, information is transmitted to a terminal by ASK modulating a carrier signal. The carrier signal also powers the terminal, i.e. is also referred to as an energizing signal. In this embodiment, for the transmission mode of the downlink pilot signal, one mode is through power supply signal carrying. For example, when the power supply signal carries information, a pilot signal may be inserted at a specific time position to be transmitted to the terminal device together with the carried information. And the terminal equipment estimates the channel according to the downlink pilot signal, so as to obtain the impulse response of the channel, and correspondingly compensates the received signal to eliminate the influence of the channel on the received signal.

Alternatively, the downlink pilot signal may be the energizing signal itself, i.e., an unmodulated carrier signal.

The terminal device may perform channel estimation according to a received signal after the carrier signal passes through the wireless channel, so as to obtain a response of the channel. When receiving the information sent by the network device, the terminal device can recover the information sent by the network device according to the result of channel estimation. For example, the carrier signal is a constant amplitude sine wave signal, and after ASK modulation, the change in amplitude of the carrier signal represents the carried information. The amplitude of the carrier signal after ASK modulation is changed due to the fading of the wireless channel, which affects the correctly demodulated amplitude change information of ASK modulation, so that the carried information is not obtained. If the carrier signal which is not modulated is used as the downlink pilot signal, the receiving end can estimate the influence of the channel according to the amplitude variation of the signal with constant amplitude of the transmitting end, and then the receiving signal is correspondingly compensated to eliminate the influence of the channel on the receiving signal.

As shown in fig. 7, the network device transmits the downlink pilot signal on the 2 nd and 6 th time units of the 7 time units, where the downlink pilot signal may or may not modulate a carrier with a high level. And the 7 time units except the 2 nd and 6 th time units can be used for transmitting user information. Alternatively, the time units may be time slots, subframes, or chip widths, etc.

Specifically, the receiving end may perform ASK demodulation according to the pilot signal. Illustratively, the receiving end determines whether the amplitude of the carrier signal modulated by the user information is a high-level signal according to the amplitude of the received pilot signal as a reference of the amplitude of the high-level signal, thereby determining the user information represented by the amplitude information of the received signal.

Of course, in other alternative embodiments, the downlink pilot signal may also be an energizing signal modulated by known information. I.e. the terminal device may perform channel estimation from the received signal after the carrier signal modulated by the known information has passed through the radio channel to obtain the response of the channel.

Example 2:

in this embodiment, the terminal device may send an uplink pilot signal to the network device, so that the network device demodulates the uplink signal based on the uplink pilot signal, for example, a backscatter signal may be used to carry the uplink pilot signal.

In a zero power consumption communication system, backscatter communication is achieved by modulating an incoming wave signal. In order to increase the communication distance, in the case of limited back-scattered signal power, it is an effective method to increase the demodulation performance of the network device for the back-scattered signal. For this purpose, an uplink pilot signal may be inserted at a specific time position in the back-scattered signal to be transmitted to the network device together with the carried information.

Specifically, the carrier signal may be directly backscattered without load modulation at a specific time position in the backscattered signal. Alternatively, at the specific time position, the known information may be used for load modulation to form a backscatter signal. The network equipment can perform channel estimation according to the uplink pilot signal at the specific time position so as to obtain the response of the channel; the network device may then compensate for the modulated signal of the directional scattering signal by the user information accordingly based on the response of the channel to eliminate the effect of the channel on the received signal.

As shown in fig. 7, the terminal device transmits the uplink pilot signal on the 2 nd and 6 th time units among the 7 time units. Specifically, the terminal device performs load modulation on the incident carrier signal according to the modulation signal to form a backscatter signal, that is, the uplink pilot signal is sent on the 2 nd and 6 th time units in 7 time units of the backscatter signal.

Example 3:

the transmission of the pilot signal may be periodically transmitted.

That is, the zero power consumption terminal device in the cell may perform channel estimation, channel state measurement, and the like according to the periodic pilot signal. The periodic pilot signal, if carried on the energizing signal, may be an unmodulated carrier signal or a carrier signal modulated based on known information, and the pilot signal, if carried on the backscatter signal, may be a load modulated signal or an unmodulated signal. Taking the example that the periodic pilot signal is carried on the energy supply signal, the terminal device needs to be configured by the network or indicates the transmission resource corresponding to the periodic pilot signal, so that the energy supply signal carries pilot signals instead of user information on specific time units, and rate matching is performed on the specific time units.

As shown in fig. 8, the network device may periodically transmit a pilot signal on a time unit, where the pilot signal may be an unmodulated carrier signal or may be a carrier signal modulated by known information. User information may or may not be carried on the time cell in which the non-pilot signal is located. The time cell in which the pilot signal is located may be semi-statically configured by the network or predefined. After the terminal device knows the positions of the pilot signals, it considers that no user information is carried at the positions.

Of course, in other alternative embodiments, the pilot signal may also be transmitted aperiodically. For example similar to DMRS in NR systems, i.e. inserted in specific time units in the carrier signal/backscatter signal modulated by user information.

Example 4:

in this embodiment, the transmission resource corresponding to the pilot signal may be configured by configuration information.

For periodic pilot signals, its corresponding transmission resources may be semi-statically configured by the network device to the terminal device.

For example, transmission resources corresponding to the periodic pilot signal may be configured by the network device to the terminal device through the following configuration information:

The type of the pilot signal;

a period of the pilot signal;

a time offset of the pilot signal;

the length of the occupied time unit of the pilot signal;

the frequency of the carrier signal where the pilot signal is located; or (b)

The pilot signal may be of the type that is not modulated carrier signal, modulated carrier signal based on known information, load modulated signal or not load modulated signal. The subchannel number represents a subchannel having a certain bandwidth in the frequency domain.

For aperiodic pilot signals, their corresponding transmission resources can be defined using a configured or predefined pattern (pattern). The pattern may be used to define the location of time cells of the pilot signal within a certain time range. Wherein the certain time range comprises a time unit for transmitting user information and a time unit for transmitting pilot signals. For example, the patterns may be designed such that, in relation to the length of the certain time range, the time ranges of different lengths correspond to different patterns, or the time ranges of the same length correspond to a plurality of patterns. Preferably, the position of the time unit for transmitting the pilot signal may be a pre-position of the certain time range, for example, the time unit for transmitting the pilot signal may be a first time unit within the certain time range. Further, for non-periodic pilot signals, the network device may also configure at least one of a type of the pilot signal, a frequency of a carrier signal in which the pilot signal is located, and the like.

As shown in fig. 9, the pilot carrier on which the pilot signal is located and the data carrier for carrying the user information are two frequency-divided carriers. Modulating the data carrier by the user information to obtain a modulated data carrier; the receiving end can perform channel estimation according to the pilot carrier and demodulate the modulated data carrier signal based on the result of channel estimation.

Example 5:

in this embodiment, it is assumed that the terminal device supports multiple modulation modes, and the time domain resources and/or the frequency domain resources of the pilot signal are configured differently corresponding to different modulation modes. For example, for periodic pilot signals, configuration parameters of configuration information for transmitting pilot signals corresponding to different modulation schemes are at least partially different. For another example, for non-periodic pilot signals, the configuration or predefined pattern of the pilot signals for transmission corresponding to different modulation schemes is different.

Based on the scheme, the pilot signal is introduced in the zero-power consumption communication, so that the receiving end can improve the receiving performance of the signal through channel estimation, and the system performance of the zero-power consumption communication is improved.

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

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

The method embodiments of the present application are described in detail above with reference to fig. 6 to 9, and the apparatus embodiments of the present application are described in detail below with reference to fig. 10 to 13.

Fig. 10 is a schematic block diagram of a first device 300 of an embodiment of the present application.

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

a receiving unit 310, configured to receive a pilot signal through at least one of the following signals: an energizing signal, a triggering signal, or a backscatter signal.

In some embodiments, the pilot signal is an unmodulated carrier signal, or the pilot signal is a carrier signal modulated based on known information.

In some embodiments, the pilot signal is a load modulated signal in the backscatter signal, or the pilot signal is an unmodulated signal in the backscatter signal.

In some embodiments, the at least one resource configuration information corresponds to the at least one modulation scheme one-to-one.

In some embodiments, the number of resources and/or the time domain length of the transmission resources configured by different resource configuration information in the at least one resource configuration information are different.

In some embodiments, the first configuration information includes at least one of:

the type of the pilot signal;

a period of the pilot signal;

a time offset of the pilot signal;

the length of the occupied time unit of the pilot signal;

The frequency of the carrier signal where the pilot signal is located; or (b)

In some embodiments, each of the at least one pattern is used to characterize a time unit occupied by the pilot signal in a first time range, the first time range including a time unit for carrying data and a time unit for carrying the pilot signal.

In some embodiments, the time units occupied by the pilot signal in the first time range include the first n time units of the first time range, n being a positive integer.

In some embodiments, the at least one pattern corresponds one-to-one with the at least one modulation scheme.

In some embodiments, the number of resources and/or the time domain length of the transmission resources corresponding to different patterns in the at least one pattern are different.

In some embodiments, the second configuration information includes at least one of:

the type of the pilot signal;

the frequency of the carrier signal where the pilot signal is located; or (b)

In some embodiments, the type of pilot signal comprises at least one of:

In some embodiments, the first device 300 may further include a demodulation unit 320 configured to:

and demodulating the received signal based on the channel estimation result.

In some embodiments, the pilot signal is a reference signal.

It should be understood that apparatus embodiments and method embodiments may correspond with each other and that similar descriptions may refer to the method embodiments. Specifically, the first device 300 shown in fig. 10 may correspond to a corresponding main body in the method 200 for executing the embodiment of the present application, and the foregoing and other operations and/or functions of each unit in the first device 300 are respectively for implementing the corresponding flow in each method in fig. 6, and are not repeated herein for brevity.

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

As shown in fig. 11, the second apparatus 400 may include:

a transmitting unit 410, configured to transmit a pilot signal through at least one of the following signals: an energizing signal, a triggering signal, or a backscatter signal.

the type of the pilot signal;

a period of the pilot signal;

a time offset of the pilot signal;

the length of the occupied time unit of the pilot signal;

the frequency of the carrier signal where the pilot signal is located; or (b)

the type of the pilot signal;

the frequency of the carrier signal where the pilot signal is located; or (b)

In some embodiments, the type of pilot signal comprises at least one of:

In some embodiments, the pilot signal is a reference signal.

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

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

For example, the receiving unit 310 and the transmitting unit 410 referred to above may each be implemented by a transceiver, and the demodulating unit 320 referred to above may be implemented by a processor.

Fig. 12 is a schematic structural diagram of a communication device 500 of an embodiment of the present application.

As shown in fig. 12, the communication device 500 may include a processor 510.

Wherein the processor 510 may call and run a computer program from a memory to implement the method in an embodiment of the application.

As shown in fig. 12, the communication device 500 may also include a memory 520.

The memory 520 may be used for storing instruction information, and may also be used for storing code, instructions, etc. to be executed by the processor 510. 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. The memory 520 may be a separate device from the processor 510 or may be integrated into the processor 510.

As shown in fig. 12, the communication device 500 may also include a transceiver 530.

The processor 510 may control the transceiver 530 to communicate with other devices, and in particular, may send information or data to other devices or receive information or data sent by other devices. The transceiver 530 may include a transmitter and a receiver. The transceiver 530 may further include antennas, the number of which may be one or more.

It should be appreciated that the various components in the communication device 500 are connected by a bus system that includes a power bus, a control bus, and a status signal bus in addition to a data bus.

It should also be understood that the communication device 500 may be a first device of the embodiment of the present application, and the communication device 500 may implement a corresponding flow implemented by the first device in each method of the embodiment of the present application, that is, the communication device 500 of the embodiment of the present application may correspond to the first device 300 of the embodiment of the present application, and may correspond to a corresponding main body in performing the method 200 according to the embodiment of the present application, which is not repeated herein for brevity. Similarly, the communication device 500 may be the second device of the embodiment of the present application, and the communication device 500 may implement the corresponding flow implemented by the second device in the respective methods of the embodiment of the present application. That is, the communication device 500 according to the embodiment of the present application may correspond to the second device 400 according to the embodiment of the present application, and may correspond to a corresponding main body in performing the method 300 according to the embodiment of the present application, which is not described herein for brevity.

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

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

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

As shown in fig. 13, the chip 600 includes a processor 610.

Wherein the processor 610 may call and run a computer program from a memory to implement the methods of embodiments of the present application.

As shown in fig. 13, the chip 600 may further include a memory 620.

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

As shown in fig. 13, the chip 600 may further include an input interface 630.

The processor 610 may control the input interface 630 to communicate with other devices or chips, and in particular, may acquire information or data sent by the other devices or chips.

As shown in fig. 13, the chip 600 may further include an output interface 640.

Wherein the processor 610 may control the output interface 640 to communicate with other devices or chips, and in particular, may output information or data to other devices or chips.

It should be understood that the chip 600 may be applied to the second device in the embodiment of the present application, and the chip may implement a corresponding flow implemented by the second device in each method in the embodiment of the present application, and may also implement a corresponding flow implemented by the first device in each method in the embodiment of the present application, which is not described herein for brevity.

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

Claims

A method of wireless communication, comprising:

receiving a pilot signal by at least one of: an energizing signal, a triggering signal, or a backscatter signal.
The method of claim 1, wherein the transmission resources corresponding to the pilot signal comprise transmission resources corresponding to each of at least one modulation scheme, and wherein the at least one modulation scheme comprises a modulation scheme supported by a terminal device.
The method according to claim 2, wherein the transmission resources corresponding to the pilot signal comprise time domain resources and/or frequency domain resources.
A method according to any one of claims 1 to 3, characterized in that the pilot signal is a downlink signal, which pilot signal is carried in the energizing signal and/or the triggering signal.
The method of claim 4, wherein the pilot signal is an unmodulated carrier signal or the pilot signal is a carrier signal modulated based on known information.
A method according to any one of claims 1 to 3, characterized in that the pilot signal is an uplink signal, which pilot signal is carried in the backscatter signal.
The method of claim 6, wherein the pilot signal is a load modulated signal in the backscatter signal or the pilot signal is an unmodulated signal in the backscatter signal.
The method according to any one of claims 1 to 7, wherein the pilot signal is a periodically transmitted signal; the transmission resources corresponding to the pilot signals are configured through first configuration information, the first configuration information comprises at least one resource configuration information, and the at least one resource configuration information is respectively used for configuring the transmission resources corresponding to the at least one modulation mode for the pilot signals.
The method of claim 8, wherein the at least one resource configuration information corresponds to the at least one modulation scheme one-to-one.
The method according to claim 8 or 9, characterized in that the number of resources and/or the time domain length of transmission resources configured by different resource configuration information of the at least one resource configuration information is different.
The method according to any one of claims 8 to 10, wherein the first configuration information comprises at least one of:

the type of the pilot signal;

a period of the pilot signal;

a time offset of the pilot signal;

the length of the occupied time unit of the pilot signal;

the frequency of the carrier signal where the pilot signal is located; or (b)

And the sub-channel number of the sub-channel where the pilot signal is located.
The method according to any one of claims 1 to 7, wherein the pilot signal is a non-periodically transmitted signal; the transmission resources corresponding to the pilot signals are resources configured through second configuration information, the second configuration information is used for configuring at least one pattern, and the at least one pattern is used for representing the transmission resources corresponding to the at least one modulation mode and used for transmitting the pilot signals.
The method of claim 12, wherein each of the at least one pattern is used to characterize time units occupied by the pilot signal in a first time range, the first time range comprising time units for carrying data and time units for carrying the pilot signal.
The method of claim 13, wherein the time units occupied by the pilot signal in the first time range comprise the first n time units of the first time range, n being a positive integer.
The method according to any one of claims 12 to 14, wherein the at least one pattern corresponds one-to-one to the at least one modulation scheme.
The method according to any of the claims 12 to 15, characterized in that the number of resources and/or the time domain length of transmission resources corresponding to different ones of the at least one pattern are different.
The method according to any one of claims 12 to 16, wherein the second configuration information comprises at least one of:

the type of the pilot signal;

the frequency of the carrier signal where the pilot signal is located; or (b)

And the sub-channel number of the sub-channel where the pilot signal is located.
The method according to claim 11 or 17, wherein the type of pilot signal comprises at least one of:

an unmodulated carrier signal, a carrier signal modulated based on known information, a load modulated signal, or an unmodulated signal.
The method according to any one of claims 1 to 18, further comprising:

performing channel estimation based on the pilot signal to obtain a channel estimation result;

and demodulating the received signal based on the channel estimation result.
The method according to any one of claims 1 to 19, wherein the pilot signal is a reference signal.
A method of wireless communication, comprising:

transmitting a pilot signal by at least one of: an energizing signal, a triggering signal, or a backscatter signal.
The method of claim 21, wherein the transmission resources corresponding to the pilot signal comprise transmission resources corresponding to each of at least one modulation scheme, and wherein the at least one modulation scheme comprises a modulation scheme supported by a terminal device.
The method of claim 22, wherein the transmission resources corresponding to the pilot signal comprise time domain resources and/or frequency domain resources.
The method according to any of claims 21 to 23, wherein the pilot signal is a downlink signal, the pilot signal being carried in the energizing signal and/or the triggering signal.
The method of claim 24, wherein the pilot signal is an unmodulated carrier signal or the pilot signal is a carrier signal modulated based on known information.
The method according to any one of claims 21 to 23, wherein the pilot signal is an uplink signal, the pilot signal being carried in the backscatter signal.
The method of claim 26, wherein the pilot signal is a load modulated signal in the backscatter signal or the pilot signal is an unmodulated signal in the backscatter signal.
The method according to any one of claims 21 to 27, wherein the pilot signal is a periodically transmitted signal; the transmission resources corresponding to the pilot signals are configured through first configuration information, the first configuration information comprises at least one resource configuration information, and the at least one resource configuration information is respectively used for configuring the transmission resources corresponding to the at least one modulation mode for the pilot signals.
The method of claim 28, wherein the at least one resource configuration information corresponds to the at least one modulation scheme one-to-one.
The method according to claim 28 or 29, wherein the number of resources and/or the time domain length of transmission resources configured by different resource configuration information of the at least one resource configuration information is different.
The method of any one of claims 28 to 30, wherein the first configuration information comprises at least one of:

the type of the pilot signal;

a period of the pilot signal;

a time offset of the pilot signal;

the length of the occupied time unit of the pilot signal;

the frequency of the carrier signal where the pilot signal is located; or (b)

And the sub-channel number of the sub-channel where the pilot signal is located.
The method according to any one of claims 21 to 27, wherein the pilot signal is a non-periodically transmitted signal; the transmission resources corresponding to the pilot signals are resources configured through second configuration information, the second configuration information is used for configuring at least one pattern, and the at least one pattern is used for representing the transmission resources corresponding to the at least one modulation mode and used for transmitting the pilot signals.
The method of claim 32, wherein each of the at least one pattern is used to characterize time units occupied by the pilot signal in a first time range, the first time range comprising time units used to carry data and time units used to carry the pilot signal.
The method of claim 33, wherein the time units occupied by the pilot signal in the first time range comprise the first n time units of the first time range, n being a positive integer.
The method according to any one of claims 32 to 34, wherein the at least one pattern corresponds one-to-one with the at least one modulation scheme.
The method according to any of the claims 32 to 35, wherein the number of resources and/or the time domain length of transmission resources corresponding to different ones of the at least one pattern are different.
The method of any one of claims 32 to 36, wherein the second configuration information comprises at least one of:

the type of the pilot signal;

the frequency of the carrier signal where the pilot signal is located; or (b)

And the sub-channel number of the sub-channel where the pilot signal is located.
The method according to claim 31 or 37, wherein the type of pilot signal comprises at least one of:

an unmodulated carrier signal, a carrier signal modulated based on known information, a load modulated signal, or an unmodulated signal.
The method according to any one of claims 21 to 38, wherein the pilot signal is a reference signal.
A first device, comprising:

a receiving unit for receiving a pilot signal by at least one of the following signals: an energizing signal, a triggering signal, or a backscatter signal.
A second device, comprising:

a transmitting unit for transmitting a pilot signal through at least one of the following signals: an energizing signal, a triggering signal, or a backscatter signal.
A first device, comprising:

a processor and a memory for storing a computer program, the processor being for invoking and running the computer program stored in the memory to perform the method of any of claims 1 to 20.
A second device, comprising:

a processor and a memory for storing a computer program, the processor being for invoking and running the computer program stored in the memory to perform the method of any of claims 21 to 39.
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 20 or the method of any one of claims 21 to 39.
A computer readable storage medium storing a computer program for causing a computer to perform the method of any one of claims 1 to 20 or the method of any one of claims 21 to 39.
A computer program product comprising computer program instructions for causing a computer to perform the method of any one of claims 1 to 20 or the method of any one of claims 21 to 39.
A computer program, characterized in that the computer program causes a computer to perform the method of any one of claims 1 to 20 or the method of any one of claims 21 to 39.