WO2023000175A1 - Wireless communication method, first device, and second device - Google Patents

Abstract

Embodiments of the present application provide a wireless communication method, a first device, and a second device. The method comprises: receiving a pilot signal by means of at least one of the following signals: an energy supply signal, a trigger signal, and a backscatter signal. In the present application, the pilot signal is received by means of the at least one of the following signals: an energy supply signal, a trigger signal and a backscatter signal, being conducive to performing channel estimation on the basis of the pilot signal, and demodulating an uplink signal or a downlink signal on the basis of the channel estimation result, that is, the receiving performance and the coverage area of a signal can be improved.

Description

Wireless communication method, first device and second device technical field

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

Background technique

When the semi-passive zero-power terminal is far away from the network node, the charging efficiency is greatly reduced. The energy collected in real time cannot meet the immediate communication needs, that is, energy collection and storage are required before communication. Therefore, for this type of terminal, how to improve signal receiving performance and coverage area is a technical problem that needs to be solved urgently in this field.

Contents of the invention

Embodiments of the present application provide a wireless communication method, a first device, and a second device, which can improve signal receiving performance and coverage area.

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

The pilot signal is received via at least one of: an energizing signal, a triggering signal, or a backscattered signal.

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

The pilot signal is transmitted by at least one of the following signals: an energizing signal, a triggering signal, or a backscattered signal.

In a third aspect, the present application provides a first device configured to execute the method in the above first aspect or various implementations thereof. Specifically, the first device includes a functional module configured to execute the method in the foregoing first aspect or each implementation manner thereof.

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

In this application, the pilot signal is received by at least one of the following signals: an energy supply signal, a trigger signal or a backscatter signal, which is conducive to channel estimation based on the pilot signal, and based on the channel estimation result, the uplink signal or The demodulation of the downlink signal can improve the receiving performance and coverage area of the signal.

Description of drawings

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

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

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

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

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

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

FIG. 7 is an example in which the pilot signal provided by the embodiment of the present application is 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 the pilot signal provided by the embodiment of the present application and the carrier signal used to carry user information 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 technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, but not all of the embodiments. With regard to the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of this application.

It should be understood that the terms "system" and "network" are often used interchangeably herein. The term "and/or" in this article is just an association relationship describing associated objects, which means that there can be three relationships, for example, A and/or B can mean: A exists alone, A and B exist simultaneously, and there exists alone B these three situations. In addition, the character "/" in this article generally indicates that the contextual objects are an "or" relationship.

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

Embodiments of the present application can be applied to various communication systems, such as: Global System of Mobile communication (GSM) system, Code Division Multiple Access (CDMA) system, Wideband Code Division Multiple Access (Wideband Code Division Multiple Access (WCDMA) system, General Packet Radio Service (GPRS), Long Term Evolution (LTE) system, Advanced long term evolution (LTE-A) system, new wireless (New Radio, NR) system, evolution system of NR system, LTE (LTE-based access to unlicensed spectrum, LTE-U) system on unlicensed spectrum, NR (NR-based access to unlicensed spectrum, NR-U) system, Universal Mobile Telecommunication System (UMTS), Wireless Local Area Networks (WLAN), Wireless Fidelity (WiFi), next generation communication system, zero power consumption communication system , cellular Internet of Things, cellular passive Internet of Things or other communication systems, etc.

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

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

Optionally, the communication system in the embodiment of the present application may be applied to a carrier aggregation (Carrier Aggregation, CA) scenario, may also be applied to a dual connectivity (Dual Connectivity, DC) scenario, and may also be applied to an independent (Standalone, SA) deployment Web scene.

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

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

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

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

It should be understood that a device with a communication function in the network/system in the embodiment of the present application may be referred to as a communication device. Taking the communication system 100 shown in FIG. 1 as an example, the communication equipment may include a network equipment 110 and a terminal equipment 120 with communication functions. The network equipment 110 and the terminal equipment 120 may be the specific equipment described above, and will not be repeated here. The communication device may also include other devices in the communication system 100, such as network controllers, mobility management entities and other network entities, which are not limited in this embodiment of the present application.

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

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

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

As an example but not a limitation, in this embodiment of the present application, the terminal device may also be a wearable device. Wearable devices can also be called wearable smart devices, which is a general term for the application of wearable technology to intelligently design daily wear and develop wearable devices, such as glasses, gloves, watches, clothing and shoes. A wearable device is a portable device that is worn directly on the body or integrated into the user's clothing or accessories. Wearable devices are not only a hardware device, but also achieve powerful functions through software support, data interaction, and cloud interaction. Generalized wearable smart devices include full-featured, large-sized, complete or partial functions without relying on smart phones, such as smart watches or smart glasses, etc., and only focus on a certain type of application functions, and need to cooperate with other devices such as smart phones Use, such as various smart bracelets and smart jewelry for physical sign monitoring.

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

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

An RFID system is a wireless communication system. The RFID system is composed of two parts: an electronic tag (TAG) and a reader/writer (Reader/Writer). Electronic tags include coupling components and chips, and each electronic tag has a unique electronic code, which is placed on the target to achieve the purpose of marking the target object. The reader can not only read the information on the electronic tag, but also write the information on the electronic tag, and at the same time provide the electronic tag with the energy required for communication.

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

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

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

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

1. Energy harvesting (RF Power Harvesting).

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

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

2. Back Scattering.

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

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

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

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

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

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

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

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

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

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

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

In a specific implementation, the data transmitted by the terminal device may use different forms of codes to represent binary "1" and "0". RFID systems typically use one of the following encoding methods: reverse non-return-to-zero (NRZ) encoding, Manchester encoding, unipolar return-to-zero (Unipolar RZ) encoding, differential biphase (DBP) encoding, Miller coding and differential coding. In layman's terms, it is to use different pulse signals to represent 0 and 1.

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

1. Passive zero power consumption terminal.

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

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

2. Semi-passive zero-power consumption terminal.

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

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

3. Active zero-power consumption terminal.

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

It should be noted that the performance of the wireless communication system is greatly affected by the wireless channel, such as shadow fading and frequency selective fading, etc., making the propagation path between the transmitter and receiver very complicated. The wireless channel is not fixed and predictable like the wired channel, but has great randomness, which poses a great challenge to the design of the receiver. Channel estimation techniques are widely used in wireless communication systems. The realization of channel estimation technology needs to know the information of the wireless channel, such as the order of the channel, Doppler frequency shift and multipath delay or the impulse response of the channel and other parameters. Therefore, channel parameter estimation is a key technology in the realization of wireless communication systems. Whether or not detailed channel information can be obtained, so that the transmitted signal can be correctly demodulated at the receiving end is an important index to measure the performance of a wireless communication system.

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

1. Estimation based on reference signal.

The channel estimation result of the pilot position can be obtained by inserting the known pilot symbol into the transmitted useful data; the channel estimation result of the useful data position is obtained through interpolation by using the channel estimation result of the pilot position, and the channel estimation is completed. Its characteristic is that reference signals, such as pilot signals, are needed.

2. Blind estimation.

It is a method of channel estimation by using some inherent characteristics of the modulated signal itself that have nothing to do with the specific carrying information bits, or by adopting the method of decision feedback.

3. Semi-blind estimation.

A channel estimation method that combines the advantages of blind estimation and pilot-based estimation.

In addition, in RFID technology, the modulation method of the reader is mainly amplitude keying (ASK), for example, double-sideband amplitude shift keying (double-sideband amplitude shift keying, DSB-ASK), single-sideband amplitude shift keying (single-sideband amplitude shift keying, SSB-ASK) or phase-reversal amplitude shift keying (PR-ASK). ASK modulation facilitates simple signal envelope detection for zero-power devices to obtain information. Zero-power devices support ASK and or phase-shift keying (PSK) modulation, the modulation method being chosen by the manufacturer of the zero-power device. The reader/writer will demodulate both modulation types. Due to the short communication range and limited data rate of zero-power devices, RFID systems do not require channel estimation at the receiving end. However, in the deployment scenario of cellular passive IoT, zero-power devices need to meet a certain coverage, usually tens of meters or even hundreds of meters. Moreover, zero-power devices will also have higher requirements for data rates. At this time, the influence of the wireless channel on the signal cannot be ignored. It is necessary to improve the receiving performance of the signal through channel estimation and improve the system performance of the cellular passive Internet of Things.

In other words, when the semi-passive zero-power terminal is far away from the network node, the charging efficiency is greatly reduced. The energy collected in real time cannot meet the immediate communication needs, that is, energy collection and storage are required before communication. Therefore, for this type of terminal, the signal reception performance and coverage area can be improved by considering the influence of the wireless channel on the signal.

Based on this, embodiments of the present application provide a wireless communication method, a first device, and a second device, which can improve signal receiving performance and coverage area by considering the impact of wireless channels on signals.

FIG. 6 is a schematic flowchart of a wireless communication method 200 provided by an embodiment of the present application. The method 200 may be executed interactively by the first device and the 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. In this case, 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 consumption terminal. The network device may be the network device 110 shown in FIG. 1 .

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

S210. Receive a pilot signal by using at least one of the following signals: an energy supply signal, a trigger signal, or a backscatter signal.

In this embodiment, the pilot signal is received by at least one of the following signals: an energy supply signal, a trigger signal, or a backscatter signal, which is beneficial for channel estimation based on the pilot signal, and the uplink signal is analyzed based on the channel estimation result Or downlink signal demodulation, which can improve the signal receiving performance and coverage area.

In some embodiments, the transmission resource corresponding to the pilot signal includes a transmission resource corresponding to each modulation method in at least one modulation method, and the at least one modulation method includes a modulation method supported by the terminal device.

Specifically, for RFID systems, readers usually use ASK modulation, and zero-power terminals can use ASK or PSK modulation. In a zero-power communication system, a terminal device can support more modulation modes than an RFID system for sending and receiving transmission signals. For different modulation schemes, requirements for channel estimation may be different, that is, for pilot signals corresponding to different modulation schemes, the number and/or positions of transmission resources may be different. For example, ASK modulation is greatly affected by channel fading, and has relatively high requirements for channel estimation. Under the same output power and channel noise conditions, the degradation of ASK demodulation performance with the decrease of signal-to-noise ratio is more severe than that of PSK modulation, and the ability to resist fading is not strong.

It should be noted that the term correspondence involved in this application may mean that there is a direct correspondence or indirect correspondence between the two, or that there is an association between the two, or that it indicates and is indicated, configuration and being configuration etc. The term indication can be a direct indication, an indirect indication, or an association relationship. For example, A indicates B, which can mean that A directly indicates B, for example, B can be obtained through A; it can also indicate that A indirectly indicates B, for example, A indicates C, and B can be obtained through C; it can also indicate that there is an association between A and B relation.

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

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

Optionally, the frequency domain resources may include at least one RB.

In some embodiments, the pilot signal is a downlink signal, and the pilot signal is carried in the energy supply signal and/or the trigger 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; then, the terminal device can demodulate the received signal based on the channel estimation result.

Optionally, 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, and the pilot signal is 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; then, the network device can demodulate the received signal based on the channel estimation result.

Optionally, the pilot signal is a load-modulated signal in the backscatter signal, or the pilot signal is a non-load-modulated signal in the backscatter signal.

In some embodiments, the pilot signal is a signal sent periodically; wherein, the transmission resource corresponding to the pilot signal is configured through first configuration information, and the first configuration information includes at least one piece of resource configuration information The at least one resource configuration information is respectively used to configure transmission resources corresponding to the at least one modulation mode for the pilot signal.

In other words, when the pilot signal is a periodic signal, the transmission resource corresponding to the pilot signal may include the transmission resource used to transmit the pilot signal corresponding to the at least one modulation mode, wherein the at least one The transmission resource used for transmitting the pilot signal corresponding to the modulation mode may be a resource configured by the network device.

Certainly, in other alternative embodiments, the transmission resource used for transmitting the pilot signal corresponding to the at least one modulation mode may also be a predefined resource, which is not specifically limited in this embodiment of the present application. It should be noted that, in this embodiment of the application, the "predefined" can be defined by pre-saving corresponding codes, tables, or other methods that can be used to indicate related information in devices (for example, including terminal devices and network devices). implementation, the present application does not limit the specific implementation manner. For example, the preset may refer to the one defined in the protocol. Optionally, the "protocol" may refer to a standard protocol in the communication field, for example, it may include the LTE protocol, the NR protocol, and related protocols applied in future communication systems, which are not specifically limited in this application.

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

Optionally, the pilot signal is periodically carried in the power supply signal.

Optionally, there is a one-to-one correspondence between the at least one resource configuration information and the at least one modulation mode.

Optionally, different resource configuration information in the at least one piece of resource configuration information configures different resource numbers and/or time domain lengths of the transmission resources.

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

the type of the pilot signal;

the 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 on which the pilot signal is located; or

The subchannel number of the subchannel where the pilot signal is located.

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

Unmodulated carrier signal, carrier signal modulated based on known information, load-modulated signal, or non-load-modulated signal.

In some embodiments, the pilot signal is a signal sent aperiodically; wherein, the transmission resource corresponding to the pilot signal is a resource configured through second configuration information, and the second configuration information is used to configure at least A pattern, where the at least one pattern is respectively used to represent transmission resources corresponding to the at least one modulation mode and used for transmitting the pilot signal.

In other words, when the pilot signal is an aperiodic signal, the transmission resources corresponding to the pilot signal may include transmission resources used to transmit the pilot signal corresponding to the at least one modulation mode, wherein the at least one The transmission resource used for transmitting the pilot signal corresponding to the modulation mode may be a resource configured by a network device.

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

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

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

Optionally, the time units occupied by the pilot signal in the first time range include the first n time units in 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 the n time units in the middle position , the embodiment of the present application does not specifically limit the value of n. Optionally, n can be indicated by the network device, determined by the terminal device, or predefined, and is not specifically limited in the embodiment of the present application. .

Optionally, the at least one pattern is in one-to-one correspondence with the at least one modulation manner.

Optionally, different patterns in the at least one pattern correspond to different resource numbers and/or time domain lengths of the transmission resources.

Optionally, the number of resources includes the number of RBs.

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

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

the type of the pilot signal;

the frequency of the carrier signal on which the pilot signal is located; or

The subchannel number of the subchannel where the pilot signal is located.

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

Unmodulated carrier signal, carrier signal modulated based on known information, load-modulated signal, or non-load-modulated signal.

In some embodiments, the method 200 may also include:

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

Based on the channel estimation result, the received signal is demodulated.

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

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

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

Optionally, the reference signal may include a demodulation reference signal (Demodulation Reference Signal, DMRS), a sounding reference signal (Sounding Reference Signal, SRS), a phase tracking reference signal (PT-RS), and the like. Among them, DMRS can be used for channel demodulation, SRS can be used for channel measurement, time-frequency synchronization or phase tracking, and PT-RS can also be used for channel measurement, time-frequency synchronization or phase tracking.

The scheme of the present application will be described below in conjunction with specific embodiments.

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

For a single-path Rayleigh channel, the channel model is Y=HX+n, where X is the transmitted signal, Y is the received signal, H is the multiplicative channel, and n is Gaussian white noise. The pilot signal is generally a known signal X sent at the sending end, and then H can be obtained through Y obtained at the receiving end. For signal reception, according to the H obtained by channel estimation and the received signal Y, the transmitted signal X can be restored to achieve 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 bear the downlink pilot signal.

For downlink signal transmission, the network device can send control information or data to the terminal. For example, similar to RFID technology, ASK modulation is performed on a carrier signal to carry information and send it to the terminal. The carrier signal also supplies energy to the terminal, which is also referred to as an energy supply signal. In this embodiment, for the way of sending the downlink pilot signal, one way is to carry the power supply signal. For example, when the energy supply signal carries information, a pilot signal may be inserted at a specific time position, and sent to the terminal device together with the carried information. The terminal device estimates the channel according to the downlink pilot signal, thereby obtaining the impulse response of the channel, and performs corresponding compensation on the received signal to eliminate the influence of the channel on the received signal.

Optionally, the downlink pilot signal may be an energy supply signal itself, that is, an unmodulated carrier signal.

The terminal device can perform channel estimation according to the received signal after the carrier signal passes through the wireless channel, so as to obtain the response of the channel. When the terminal device receives the information sent by the network device, it can restore the information sent by the network device according to the channel estimation result. For example, the carrier signal is a sine wave signal with constant amplitude. After ASK modulation, the change in the amplitude of the carrier represents the information carried. Due to the fading of the wireless channel, the amplitude of the carrier signal after ASK modulation will change, which will affect the correct demodulation of the ASK modulation to obtain the change information of the amplitude, so that the carried information cannot be obtained. If the unmodulated carrier signal is used as the downlink pilot signal, the receiving end can estimate the influence of the channel according to the amplitude change of the constant-amplitude signal at the sending end, and then compensate the received signal accordingly to eliminate the influence of the channel on the received signal .

FIG. 7 is an example in which the pilot signal provided by the embodiment of the present application is an unmodulated carrier signal.

As shown in Figure 7, the network device sends the downlink pilot signal on the second and sixth time units in the seven time units, and the downlink pilot signal can modulate the carrier through a high level, or The carrier may not be modulated. Time units other than the 2nd and 6th time units in the 7 time units may be used to send user information. Optionally, the time unit may be a time slot, a subframe, or a chip width.

Specifically, the receiving end may perform ASK demodulation according to the pilot signal. Exemplarily, the receiving end judges 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 for the amplitude of the high-level signal, thereby judging the amplitude of the received signal User information represented by magnitude information.

Certainly, in other alternative embodiments, the downlink pilot signal may also be an energy supply signal modulated by known information. That is, the terminal device can perform channel estimation according to the received signal after the carrier signal modulated by known information passes through the wireless channel, so as 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 bear the uplink pilot signal.

In a zero-power communication system, backscatter communication is realized by modulating the incoming wave signal. In order to increase the communication distance, it is an effective method to improve the demodulation performance of network equipment for backscattered signals when the backscattered signal power is limited. To this end, an uplink pilot signal can be inserted at a specific time position in the backscatter signal, and sent to the network device together with the carried information.

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

As shown in FIG. 7 , the terminal device sends the uplink pilot signal at the second and sixth time units in the seven 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 guide is sent in the second and sixth time units of the seven time units of the backscatter signal. frequency signal.

Example 3:

The transmission of the pilot signal may be transmitted periodically.

That is, the zero-power consumption terminal equipment in the cell can perform channel estimation, channel state measurement, etc. according to the periodic pilot signal. If the periodic pilot signal is carried on the energy supply signal, it may be an unmodulated carrier signal or a carrier signal modulated based on known information. If the pilot signal is carried on the backscatter signal, its Can be load-modulated or non-load-modulated. Taking the periodic pilot signal carried by the energy supply signal as an example, the terminal device needs to be configured by the network or indicate the transmission resources corresponding to the periodic pilot signal, so as to know the time period of the energy supply signal carried by the specific time unit. It is a pilot signal rather than user information, so as to perform rate matching for these specific time units.

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

As shown in FIG. 8 , the network device may periodically send a pilot signal in time units, and the pilot signal may be an unmodulated carrier signal or a carrier signal modulated with known information. In the time unit where the non-pilot signal is located, user information may or may not be carried. The time unit where the pilot signal is located may be configured semi-statically by the network, or may be predefined. After learning the positions of the pilot signals, the terminal device considers that these positions do not carry user information.

Of course, in other alternative embodiments, the pilot signal may also be sent aperiodically. For example, similar to the DMRS in the NR system, it is inserted into a specific time unit 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 through configuration information.

For the periodic pilot signal, its corresponding transmission resource can be semi-statically configured by the network device to the terminal device.

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

the type of the pilot signal;

the 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 on which the pilot signal is located; or

The subchannel number of the subchannel where the pilot signal is located.

Wherein, the type of the pilot signal may be an unmodulated carrier signal, a carrier signal modulated based on known information, a load-modulated signal or a non-load-modulated signal. The subchannel number indicates a subchannel with a certain bandwidth in the frequency domain.

For the aperiodic pilot signal, its corresponding transmission resource can be defined by 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 includes time units for sending user information and time units for sending pilot signals. For example, the pattern may be designed to be related to the length of the certain time range, time ranges of different lengths correspond to different patterns, or time ranges of the same length correspond to multiple patterns. Preferably, the position of the time unit used for sending the pilot signal may be the preceding position of the certain time range, for example, the time unit used for sending the pilot signal may be within the certain time range The first time unit of . Further, for the aperiodic pilot signal, the network device may also configure at least one of the type of the pilot signal, the frequency of the carrier signal where the pilot signal is located, and the like.

FIG. 9 is an example in which the pilot signal provided by the embodiment of the present application and the carrier signal used to carry user information are two frequency division carriers.

As shown in FIG. 9 , the pilot carrier where the pilot signal is located and the data carrier used to carry user information are two frequency-divided carriers. The user information modulates the data carrier to obtain the modulated data carrier; the receiving end can perform channel estimation based on the pilot carrier, and demodulate the modulated data carrier signal based on the channel estimation result.

Example 5:

In this embodiment, it is assumed that the terminal device supports multiple modulation modes, and corresponding to different modulation modes, configurations of time domain resources and/or frequency domain resources of pilot signals are different. For example, for a periodic pilot signal, the configuration parameters of the configuration information for transmitting the pilot signal corresponding to different modulation modes are at least partly different. For another example, for the aperiodic pilot signal, the configurations or predefined patterns for transmitting the pilot signal corresponding to different modulation modes are different.

Based on the above solutions, it can be seen that the present application introduces pilot signals in zero-power communication, so that the receiving end can improve signal receiving performance through channel estimation, and improve the system performance of zero-power communication.

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

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

The method embodiment of the present application is described in detail above with reference to FIGS. 6 to 9 , and the device embodiment of the present application is described in detail below in conjunction with FIGS. 10 to 13 .

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

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

The receiving unit 310 is configured to receive the pilot signal through at least one of the following signals: an energy supply signal, a trigger signal or a backscatter signal.

In some embodiments, the transmission resource corresponding to the pilot signal includes a transmission resource corresponding to each modulation method in at least one modulation method, and the at least one modulation method includes a modulation method supported by the terminal device.

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

In some embodiments, the pilot signal is a downlink signal, and the pilot signal is carried in the energy supply signal and/or the trigger 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 an uplink signal, and the pilot signal is carried in the backscatter signal.

In some embodiments, the pilot signal is a load-modulated signal in the backscattered signal, or the pilot signal is a non-load-modulated signal in the backscattered signal.

In some embodiments, the pilot signal is a signal sent periodically; wherein, the transmission resource corresponding to the pilot signal is configured through first configuration information, and the first configuration information includes at least one piece of resource configuration information The at least one resource configuration information is respectively used to configure transmission resources corresponding to the at least one modulation mode for the pilot signal.

In some embodiments, there is a one-to-one correspondence between the at least one resource configuration information and the at least one modulation mode.

In some embodiments, different resource configuration information in the at least one piece of resource configuration information configure different resource numbers and/or time domain lengths of the transmission resources.

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

the type of the pilot signal;

the 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 on which the pilot signal is located; or

The subchannel number of the subchannel where the pilot signal is located.

In some embodiments, the pilot signal is a signal sent aperiodically; wherein, the transmission resource corresponding to the pilot signal is a resource configured through second configuration information, and the second configuration information is used to configure at least A pattern, where the at least one pattern is respectively used to represent transmission resources corresponding to the at least one modulation mode and used for transmitting the pilot signal.

In some embodiments, 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 including time units 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 in the first time range, where n is a positive integer.

In some embodiments, there is a one-to-one correspondence between the at least one pattern and the at least one modulation manner.

In some embodiments, different patterns in the at least one pattern correspond to different resource numbers and/or time domain lengths of the transmission resources.

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

the type of the pilot signal;

the frequency of the carrier signal on which the pilot signal is located; or

The subchannel number of the subchannel where the pilot signal is located.

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

Unmodulated carrier signal, carrier signal modulated based on known information, load-modulated signal, or non-load-modulated signal.

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

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

Based on the channel estimation result, the received signal is demodulated.

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

It should be understood that the device embodiment and the method embodiment may correspond to each other, and similar descriptions may refer to the method embodiment. Specifically, the first device 300 shown in FIG. 10 may correspond to the corresponding subject in performing the method 200 of the embodiment of the present application, and the aforementioned and other operations and/or functions of each unit in the first device 300 are for realizing the For the sake of brevity, the corresponding processes in each method in 6 will not be repeated here.

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

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

The sending unit 410 is configured to send the pilot signal through at least one of the following signals: an energy supply signal, a trigger signal or a backscatter signal.

In some embodiments, the transmission resource corresponding to the pilot signal includes a transmission resource corresponding to each modulation method in at least one modulation method, and the at least one modulation method includes a modulation method supported by the terminal device.

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

In some embodiments, the pilot signal is a downlink signal, and the pilot signal is carried in the energy supply signal and/or the trigger 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 an uplink signal, and the pilot signal is carried in the backscatter signal.

In some embodiments, the pilot signal is a load-modulated signal in the backscattered signal, or the pilot signal is a non-load-modulated signal in the backscattered signal.

In some embodiments, the pilot signal is a signal sent periodically; wherein, the transmission resource corresponding to the pilot signal is configured through first configuration information, and the first configuration information includes at least one piece of resource configuration information The at least one resource configuration information is respectively used to configure transmission resources corresponding to the at least one modulation mode for the pilot signal.

In some embodiments, there is a one-to-one correspondence between the at least one resource configuration information and the at least one modulation mode.

In some embodiments, different resource configuration information in the at least one piece of resource configuration information configure different resource numbers and/or time domain lengths of the transmission resources.

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

the type of the pilot signal;

the 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 on which the pilot signal is located; or

The subchannel number of the subchannel where the pilot signal is located.

In some embodiments, the pilot signal is a signal sent aperiodically; wherein, the transmission resource corresponding to the pilot signal is a resource configured through second configuration information, and the second configuration information is used to configure at least A pattern, where the at least one pattern is respectively used to represent transmission resources corresponding to the at least one modulation mode and used for transmitting the pilot signal.

In some embodiments, 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 including time units 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 in the first time range, where n is a positive integer.

In some embodiments, there is a one-to-one correspondence between the at least one pattern and the at least one modulation manner.

In some embodiments, different patterns in the at least one pattern correspond to different resource numbers and/or time domain lengths of the transmission resources.

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

the type of the pilot signal;

the frequency of the carrier signal on which the pilot signal is located; or

The subchannel number of the subchannel where the pilot signal is located.

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

Unmodulated carrier signal, carrier signal modulated based on known information, load-modulated signal, or non-load-modulated signal.

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

It should be understood that the device embodiment and the method embodiment may correspond to each other, and similar descriptions may refer to the method embodiment. Specifically, the second device 400 shown in FIG. 11 may correspond to the corresponding subject in performing the method 200 of the embodiment of the present application, and the aforementioned and other operations and/or functions of each unit in the second device 400 are for realizing the For the sake of brevity, the corresponding processes in each method in 6 will not be repeated here.

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

For example, both the receiving unit 310 and the sending unit 410 mentioned above can be implemented by a transceiver, and the demodulation unit 320 mentioned above can be implemented by a processor.

FIG. 12 is a schematic structural diagram of a communication device 500 according to 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 invoke and run a computer program from the memory, so as to implement the method in the embodiment of the present application.

As shown in FIG. 12 , the communication device 500 may further include a memory 520 .

Wherein, the memory 520 may be used to store indication information, and may also be used to store codes, instructions, etc. executed by the processor 510 . Wherein, the processor 510 can invoke and run a computer program from the memory 520, so as to implement the method in the embodiment of the present application. The memory 520 may be an independent device independent of the processor 510 , or may be integrated in the processor 510 .

As shown in FIG. 12 , the communication device 500 may further include a transceiver 530 .

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

It should be understood that various components in the communication device 500 are connected through a bus system, wherein the bus system includes not only a data bus, but also a power bus, a control bus, and a status signal bus.

It should also be understood that the communication device 500 may be the first device in the embodiment of the present application, and the communication device 500 may implement the corresponding processes implemented by the first device in each method of the embodiment of the application, that is, the implementation of the present application The communication device 500 in this example may correspond to the first device 300 in the embodiment of the present application, and may correspond to a corresponding subject in performing the method 200 according to the embodiment of the present application, and for the sake of brevity, details are not repeated here. Similarly, the communication device 500 may be the second device in the embodiment of the present application, and the communication device 500 may implement the corresponding process implemented by the second device in each method of the embodiment of the present application. That is to say, the communication device 500 in the embodiment of the present application may correspond to the second device 400 in the embodiment of the present application, and may correspond to the corresponding subject in performing the method 300 according to the embodiment of the present application. Let me repeat.

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

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

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

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

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

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

Wherein, the processor 610 can control the input interface 630 to communicate with other devices or chips, specifically, can obtain information or data sent by other devices or chips.

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

Wherein, the processor 610 can control the output interface 640 to communicate with other devices or chips, specifically, can output information or data to other devices or chips.

It should be understood that the chip 600 can be applied to the second device in the embodiment of the present application, and the chip can realize the corresponding process implemented by the second device in each method of the embodiment of the present application, and can also realize the For the sake of brevity, the corresponding processes implemented by the first device in each method will not be repeated here.

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

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

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

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

The storage mentioned above includes but is not limited to:

volatile memory and/or non-volatile memory. Among them, the non-volatile memory can be read-only memory (Read-Only Memory, ROM), programmable read-only memory (Programmable ROM, PROM), erasable programmable read-only memory (Erasable PROM, EPROM), electronically programmable Erase Programmable Read-Only Memory (Electrically EPROM, EEPROM) or Flash. The volatile memory can be Random Access Memory (RAM), which acts as external cache memory. By way of illustration and not limitation, many forms of RAM are available, such as Static Random Access Memory (Static RAM, SRAM), Dynamic Random Access Memory (Dynamic RAM, DRAM), Synchronous Dynamic Random Access Memory (Synchronous DRAM, SDRAM), double data rate synchronous dynamic random access memory (Double Data Rate SDRAM, DDR SDRAM), enhanced synchronous dynamic random access memory (Enhanced SDRAM, ESDRAM), synchronous connection dynamic random access memory (synch link DRAM, SLDRAM) and Direct Memory Bus Random Access Memory (Direct Rambus RAM, DR RAM).

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

Embodiments of the present application also provide a computer-readable storage medium for storing computer programs. The computer-readable storage medium stores one or more programs, and the one or more programs include instructions. When the instructions are executed by a portable electronic device including a plurality of application programs, the portable electronic device can perform the wireless communication provided by the application. communication method. Optionally, the computer-readable storage medium can be applied to the second device in the embodiment of the present application, and the computer program causes the computer to execute the corresponding process implemented by the second device in each method of the embodiment of the present application. For brevity, I won't repeat them here. Optionally, the computer-readable storage medium can be applied to the first device in the embodiments of the present application, and the computer program enables the computer to execute the corresponding processes implemented by the first device in the methods of the embodiments of the present application. For brevity, I won't repeat them here.

The embodiment of the present application also provides a computer program product, including a computer program. Optionally, the computer program product can be applied to the second device in the embodiment of the present application, and the computer program enables the computer to execute the corresponding process implemented by the second device in each method of the embodiment of the present application. For the sake of brevity, here No longer. Optionally, the computer program product can be applied to the first device in the embodiment of the present application, and the computer program enables the computer to execute the corresponding process implemented by the first device in each method of the embodiment of the present application. For the sake of brevity, here No longer.

The embodiment of the present application also provides a computer program. When the computer program is executed by the computer, the computer can execute the wireless communication method provided in this application. Optionally, the computer program may be applied to the second device in the embodiment of the present application, and when the computer program is run on the computer, the computer executes the corresponding process implemented by the second device in each method of the embodiment of the present application, For the sake of brevity, details are not repeated here. Optionally, the computer program may be applied to the first device in the embodiment of the present application, and when the computer program is run on the computer, the computer executes the corresponding process implemented by the first device in each method of the embodiment of the present application, For the sake of brevity, details are not repeated here.

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

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

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

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

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

Claims (47)

A wireless communication method, characterized in that, comprising: The pilot signal is received via at least one of: an energizing signal, a triggering signal, or a backscattered signal. The method according to claim 1, wherein the transmission resources corresponding to the pilot signal include transmission resources corresponding to each modulation method in at least one modulation method, and the at least one modulation method includes modulation method. The method according to claim 2, wherein the transmission resources corresponding to the pilot signal include time domain resources and/or frequency domain resources. The method according to any one of claims 1 to 3, wherein the pilot signal is a downlink signal, and the pilot signal is carried in the energy supply signal and/or the trigger signal. The method according to claim 4, 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 1 to 3, wherein the pilot signal is an uplink signal, and the pilot signal is carried in the backscatter signal. The method according to claim 6, wherein the pilot signal is a load-modulated signal in the backscatter signal, or the pilot signal is a load-modulated signal in the backscatter signal load modulated signal. The method according to any one of claims 1 to 7, wherein the pilot signal is a signal sent periodically; wherein the transmission resource corresponding to the pilot signal is configured through the first configuration information The first configuration information includes at least one resource configuration information, and the at least one resource configuration information is respectively used to configure transmission resources corresponding to the at least one modulation mode for the pilot signal. The method according to claim 8, characterized in that the at least one piece of resource configuration information corresponds to the at least one modulation scheme one by one. The method according to claim 8 or 9, characterized in that the resource numbers and/or time domain lengths of transmission resources configured by different resource configuration information in the at least one piece of resource configuration information are different. The method according to any one of claims 8 to 10, wherein the first configuration information includes at least one of the following: the type of the pilot signal; the 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 on which the pilot signal is located; or The subchannel number of the subchannel where the pilot signal is located. The method according to any one of claims 1 to 7, wherein the pilot signal is a signal sent aperiodically; wherein the transmission resource corresponding to the pilot signal is configured through the second configuration information resources, the second configuration information is used to configure at least one pattern, and the at least one pattern is respectively used to characterize transmission resources corresponding to the at least one modulation mode and used to transmit the pilot signal. The method according to claim 12, wherein each pattern in the at least one pattern is used to characterize the time unit occupied by the pilot signal in a first time range, and the first time range includes The time unit for carrying data and the time unit for carrying the pilot signal. The method according to claim 13, wherein the time units occupied by the pilot signal in the first time range include the first n time units in the first time range, and n is a positive integer. The method according to any one of claims 12 to 14, characterized in that the at least one pattern corresponds to the at least one modulation mode one by one. The method according to any one of claims 12 to 15, characterized in that the resource numbers and/or time domain lengths of transmission resources corresponding to different patterns in the at least one pattern are different. The method according to any one of claims 12 to 16, wherein the second configuration information includes at least one of the following: the type of the pilot signal; the frequency of the carrier signal on which the pilot signal is located; or The subchannel number of the subchannel where the pilot signal is located. The method according to claim 11 or 17, wherein the type of the pilot signal includes at least one of the following: Unmodulated carrier signal, carrier signal modulated based on known information, load-modulated signal, or non-load-modulated 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; Based on the channel estimation result, the received signal is demodulated. The method according to any one of claims 1 to 19, wherein the pilot signal is a reference signal. A wireless communication method, characterized in that, comprising: The pilot signal is transmitted by at least one of the following signals: an energizing signal, a triggering signal, or a backscattered signal. The method according to claim 21, wherein the transmission resources corresponding to the pilot signal include transmission resources corresponding to each modulation method in at least one modulation method, and the at least one modulation method includes modulation method. The method according to claim 22, wherein the transmission resources corresponding to the pilot signal include time domain resources and/or frequency domain resources. The method according to any one of claims 21 to 23, wherein the pilot signal is a downlink signal, and the pilot signal is carried in the energy supply signal and/or the trigger signal. The method according to 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, and the pilot signal is carried in the backscatter signal. The method according to claim 26, wherein the pilot signal is a load-modulated signal in the backscatter signal, or the pilot signal is a load-modulated signal in the backscatter signal load modulated signal. The method according to any one of claims 21 to 27, wherein the pilot signal is a signal sent periodically; wherein the transmission resource corresponding to the pilot signal is configured through the first configuration information The first configuration information includes at least one resource configuration information, and the at least one resource configuration information is respectively used to configure transmission resources corresponding to the at least one modulation mode for the pilot signal. The method according to claim 28, wherein the at least one piece of resource configuration information corresponds to the at least one modulation scheme one by one. The method according to claim 28 or 29, characterized in that the resource numbers and/or time domain lengths of transmission resources configured by different resource configuration information in the at least one piece of resource configuration information are different. The method according to any one of claims 28 to 30, wherein the first configuration information includes at least one of the following: the type of the pilot signal; the 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 on which the pilot signal is located; or The subchannel number of the subchannel where the pilot signal is located. The method according to any one of claims 21 to 27, wherein the pilot signal is a signal sent aperiodically; wherein, the transmission resource corresponding to the pilot signal is configured through the second configuration information resources, the second configuration information is used to configure at least one pattern, and the at least one pattern is respectively used to characterize transmission resources corresponding to the at least one modulation mode and used to transmit the pilot signal. The method according to claim 32, wherein each pattern in said at least one pattern is used to characterize the time unit occupied by said pilot signal in a first time range, said first time range comprising The time unit for carrying data and the time unit for carrying the pilot signal. The method according to claim 33, wherein the time units occupied by the pilot signal in the first time range include the first n time units in the first time range, and n is a positive integer. The method according to any one of claims 32 to 34, characterized in that the at least one pattern corresponds to the at least one modulation mode one by one. The method according to any one of claims 32 to 35, wherein the resource numbers and/or time domain lengths of transmission resources corresponding to different patterns in the at least one pattern are different. The method according to any one of claims 32 to 36, wherein the second configuration information includes at least one of the following: the type of the pilot signal; the frequency of the carrier signal on which the pilot signal is located; or The subchannel number of the subchannel where the pilot signal is located. The method according to claim 31 or 37, wherein the type of the pilot signal includes at least one of the following: Unmodulated carrier signal, carrier signal modulated based on known information, load-modulated signal, or non-load-modulated signal. The method according to any one of claims 21 to 38, wherein the pilot signal is a reference signal. A first device, characterized in that it comprises: The receiving unit is configured to receive the pilot signal through at least one of the following signals: an energy supply signal, a trigger signal or a backscatter signal. A second device, characterized in that it comprises: The sending unit is configured to send the pilot signal through at least one of the following signals: an energy supply signal, a trigger signal or a backscatter signal. A first device, characterized in that it comprises: A processor and a memory, the memory is used to store a computer program, and the processor is used to invoke and run the computer program stored in the memory to execute the method according to any one of claims 1 to 20. A second device, characterized in that it comprises: A processor and a memory, the memory is used to store a computer program, and the processor is used to call and run the computer program stored in the memory to execute the method according to any one of claims 21 to 39. A chip, characterized in that it comprises: The processor is used to call and run the computer program from the memory, so that the device equipped with the chip executes the method according to any one of claims 1 to 20 or any one of claims 21 to 39 Methods. A computer-readable storage medium, characterized in that it is used to store a computer program, the computer program causes the computer to execute the method according to any one of claims 1 to 20 or any one of claims 21 to 39 the method described. A computer program product, characterized in that it includes computer program instructions, the computer program instructions cause a computer to perform the method according to any one of claims 1 to 20 or any one of claims 21 to 39 Methods. A computer program, characterized in that the computer program causes a computer to execute the method according to any one of claims 1-20 or the method according to any one of claims 21-39.

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