Communication method and device, terminal equipment and network equipment

Abstract

The embodiment of the invention provides a communication method and device, terminal equipment and network equipment, and the method comprises the steps that the terminal equipment receives a first signal transmitted by the network equipment, and transmits a second signal to the network equipment; the second signal is a backscattering signal of the first signal; wherein the channel where the second signal is located satisfies a first constraint, and / or the time domain position where the second signal is located satisfies a second constraint.

Description

Communication method and device, terminal equipment, and network equipment Technical Field

[0001] The embodiments of the present application relate to the field of mobile communication technology, and specifically to a communication method and apparatus, terminal equipment, and network equipment. Background Art

[0002] Zero-power terminals need to harvest radio waves for energy before they can operate. Therefore, before sourcing energy, they are in a "power-off" state, unable to send or receive signals. In networks with multiple channels, once a zero-power terminal has been "activated" and receives energy, it can operate on any of these channels. However, network devices typically communicate with the zero-power terminal on only one of these channels.

[0003] When network devices send downlink signals, they may also receive backscattered signals from zero-power terminals. This may cause self-interference problems in network devices, that is, the downlink transmission of the network device interferes with the network device's reception of backscattered signals. How to avoid this self-interference is a key issue in zero-power communication systems.

[0004] Summary of the Invention

[0005] Embodiments of the present application provide a communication method and apparatus, terminal equipment, network equipment, chip, computer-readable storage medium, computer program product, and computer program.

[0006] The communication method provided in the embodiment of the present application includes:

[0007] The terminal device receives a first signal sent by a network device and sends a second signal to the network device; the second signal is a backscattered signal of the first signal; wherein the channel where the second signal is located satisfies the first constraint, and / or the time domain position where the second signal is located satisfies the second constraint.

[0008] The communication method provided in the embodiment of the present application includes:

[0009] A network device sends a first signal to a terminal device and receives a second signal sent by the terminal device; the second signal is a backscattered signal of the first signal; wherein the channel where the second signal is located satisfies the first constraint, and / or the time domain position where the second signal is located satisfies the second constraint.

[0010] The communication device provided in an embodiment of the present application is applied to a terminal device in a zero-power communication system, and the device includes:

[0011] a receiving unit, configured to receive a first signal sent by a network device;

[0012] a sending unit, configured to send a second signal to the network device; the second signal being a backscattered signal of the first signal;

[0013] The channel where the second signal is located satisfies a first constraint, and / or the time domain position where the second signal is located satisfies a second constraint.

[0014] The communication device provided in an embodiment of the present application is applied to a network device in a zero-power communication system, and the device includes:

[0015] A sending unit, configured to send a first signal to a terminal device;

[0016] a receiving unit, configured to receive a second signal sent by the terminal device; the second signal being a backscattered signal of the first signal;

[0017] The channel where the second signal is located satisfies a first constraint, and / or the time domain position where the second signal is located satisfies a second constraint.

[0018] The terminal device provided in an embodiment of the present application includes 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 perform the above-mentioned communication method.

[0019] The network device provided in the embodiment of the present application includes 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 perform the above-mentioned communication method.

[0020] The chip provided in the embodiment of the present application is used to implement the above-mentioned communication method.

[0021] Specifically, the chip includes: a processor, which is used to call and run a computer program from a memory, so that a device equipped with the chip executes the above-mentioned communication method.

[0022] The computer-readable storage medium provided in an embodiment of the present application is used to store a computer program, which enables a computer to execute the above-mentioned communication method.

[0023] The computer program product provided in the embodiments of the present application includes computer program instructions, which enable a computer to execute the above-mentioned communication method.

[0024] The computer program provided in the embodiment of the present application, when executed on a computer, enables the computer to execute the above-mentioned communication method.

[0025] In the technical solution of the embodiment of the present application, the terminal device sends the backscatter signal through a channel that satisfies the first constraint and / or a time domain position that satisfies the second constraint, thereby avoiding the self-interference problem caused by the backscatter signal to the network device, improving the reliability of the backscatter communication, and improving the robustness of the backscatter communication system performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0027] FIG1 is a schematic diagram of zero-power communication provided by an embodiment of the present application;

[0028] FIG2 is a schematic diagram of energy harvesting according to an embodiment of the present application;

[0029] FIG3 is a schematic diagram of backscatter communication provided by an embodiment of the present application;

[0030] FIG4 is a circuit diagram of resistive load modulation provided in an embodiment of the present application;

[0031] FIG5 is a schematic diagram of non-return-to-zero encoding provided in an embodiment of the present application;

[0032] FIG6 is a schematic diagram of Manchester encoding provided in an embodiment of the present application;

[0033] FIG7 is a schematic diagram of unipolar return-to-zero encoding provided in an embodiment of the present application;

[0034] FIG8 is a schematic diagram of differential bi-phase encoding provided by an embodiment of the present application;

[0035] FIG9 is a schematic diagram of Miller coding provided in an embodiment of the present application;

[0036] FIG10 is a schematic diagram of the frequency position of the energy supply channel provided in an embodiment of the present application;

[0037] FIG11 is a schematic diagram of self-interference provided in an embodiment of the present application;

[0038] FIG12 is a flow chart of a communication method according to an embodiment of the present application;

[0039] FIG13 is a schematic diagram of a channel pattern of a network deployment provided in an embodiment of the present application;

[0040] FIG14 is a schematic diagram of time domain avoidance provided in an embodiment of the present application;

[0041] FIG15 is a schematic diagram of time-frequency domain avoidance provided in an embodiment of the present application;

[0042] FIG16 is a schematic diagram of the first structure of a communication device provided in an embodiment of the present application;

[0043] FIG17 is a second schematic diagram of the structure of the communication device provided in an embodiment of the present application;

[0044] FIG18 is a schematic structural diagram of a communication device provided in an embodiment of the present application;

[0045] FIG19 is a schematic structural diagram of a chip according to an embodiment of the present application;

[0046] Figure 20 is a schematic block diagram of a communication system provided in an embodiment of the present application. DETAILED DESCRIPTION

[0047] To facilitate understanding of the technical solutions of the embodiments of the present application, the relevant technologies of the embodiments of the present application are described below. The following relevant technologies can be arbitrarily combined with the technical solutions of the embodiments of the present application as optional solutions, and they all fall within the protection scope of the embodiments of the present application.

[0048] Principles of Zero-Power Communication Technology

[0049] Zero-power communication uses energy harvesting and backscatter communication technology. The zero-power communication system consists of network equipment and zero-power terminals, as shown in Figure 1. The network equipment is used to send power supply signals (i.e., radio waves), downlink communication signals, and receive backscatter signals from the zero-power terminals. As an example, the zero-power terminal includes an energy harvesting module, a backscatter communication module, and a low-power computing module. In addition, the zero-power terminal may also have a memory and / or a sensor. The memory is used to store some basic information (such as item identification, etc.), and the sensor is used to obtain sensor data such as ambient temperature and ambient humidity.

[0050] The following further explains the key technologies of zero-power communication.

[0051] (1) Power Harvesting

[0052] Figure 2 is a schematic diagram of energy harvesting. As shown in Figure 2, the energy harvesting module uses the principle of electromagnetic induction to harvest electromagnetic wave energy from space, thereby obtaining the energy required to drive the zero-power terminal and drive the load circuit (such as low-power computing modules and sensors). Therefore, the zero-power terminal does not require traditional batteries, achieving battery-free communication.

[0053] As an example, the energy collection module refers to a radio frequency energy collection module, which can collect energy carried by radio waves in space, thereby realizing the collection of electromagnetic wave energy in space.

[0054] (2) Back Scattering

[0055] Figure 3 is a schematic diagram of backscatter communication. As shown in Figure 3, the zero-power terminal receives the wireless signal sent by the network device (i.e., the carrier in Figure 3), modulates the wireless signal, that is, loads the information to be sent on the wireless signal, and radiates the modulated signal from the antenna. This information transmission process is called backscatter communication.

[0056] Backscatter communication and load modulation are closely related. Load modulation is a method frequently used by zero-power terminals to load information. Load modulation achieves this by adjusting and controlling the circuit parameters of the zero-power terminal's oscillator circuit according to the data flow rhythm, thereby changing the impedance and / or phase of the zero-power terminal. Load modulation techniques primarily include resistive load modulation and capacitive load modulation.

[0057] As shown in Figure 4, in resistive load modulation, a resistor is connected in parallel with the load, called the load modulation resistor. This resistor is turned on or off based on the control of the binary data stream. The on-off switching of the resistor causes the circuit voltage to change, thus implementing amplitude-shifted keying (ASK). This modulation is achieved by adjusting the amplitude of the backscattered signal from the zero-power terminal. Similarly, in capacitive load modulation, a capacitor is connected in parallel with the load, called the load modulation capacitor. This capacitor replaces the load modulation resistor in Figure 4. The on-off switching of the capacitor changes the resonant frequency of the circuit, thus achieving frequency-shifted keying (FSK). This modulation is achieved by adjusting the operating frequency of the backscattered signal from the zero-power terminal.

[0058] As can be seen, zero-power terminals utilize load modulation to modulate incoming signals, thereby achieving backscatter communication. Therefore, zero-power terminals offer the following significant advantages: First, since they do not actively transmit signals, they do not require complex RF links, such as power amplifiers and RF filters. Second, since they do not actively generate high-frequency signals, they do not require a high-frequency crystal oscillator. Furthermore, since backscatter communication is used, the transmission process does not consume the terminal's own energy.

[0059] (3) Energy supply signal and trigger signal in zero-power communication system

[0060] Power supply signal

[0061] The power supply signal is used to provide energy to zero-power devices.

[0062] In terms of the carrier of the energy supply signal, the transmitter of the energy supply signal can be a base station, smart gateway, charging station, micro base station, smart phone, etc.

[0063] In terms of the frequency band of the power supply signal, the frequency band of the radio wave used as the power supply signal can be low frequency, medium frequency, high frequency, etc.

[0064] In terms of the waveform of the power supply signal, the waveform of the radio wave used as the power supply signal can be a sine wave, a square wave, a triangle wave, a pulse, a rectangular wave, etc.

[0065] In addition, the power supply signal can be a continuous wave or a discontinuous wave (ie, a certain period of interruption is allowed).

[0066] The power supply signal can be, but is not limited to, a physical signal specified in the 3GPP standard, such as a sounding reference signal (SRS), a physical uplink shared channel (PUSCH), a physical random access channel (PRACH), a physical uplink control channel (PUCCH), a physical downlink control channel (PDCCH), a physical downlink shared channel (PDSCH), a physical broadcast channel (PBCH), etc. Not limited to this, the power supply signal can also be a new signal.

[0067] Trigger signal

[0068] The trigger signal is used to trigger the zero-power device to communicate. In other words, the trigger signal is used to schedule the zero-power device.

[0069] In terms of the carrier of the trigger signal, the transmitter of the trigger signal can be a base station, smart gateway, charging station, micro base station, smart phone, etc.

[0070] In terms of the frequency band of the trigger signal, the frequency band of the radio wave used as the trigger signal can be low frequency, medium frequency, high frequency, etc.

[0071] In terms of the waveform of the trigger signal, the waveform of the radio wave used as the trigger signal can be a sine wave, square wave, triangle wave, pulse, rectangular wave, etc.

[0072] In addition, the trigger signal can be a continuous wave or a discontinuous wave (ie, a certain period of interruption is allowed).

[0073] The trigger signal may be, but is not limited to, a physical signal specified in the 3GPP standard, such as SRS, PUSCH, PRACH, PUCCH, PDCCH, PDSCH, PBCH, etc. The trigger signal is not limited thereto and may also be a new signal.

[0074] Coding method for zero-power communication

[0075] Data transmitted by zero-power terminals can use various codes to represent binary "1" and "0." RFID systems typically use one of the following encoding methods: Non-Return-Zero (NRZ), Manchester, Unipolar Return-Zero (Unipolar RZ), Differential Bi-Phase (DBP), Miller, and differential encoding. Using different codes to represent binary "1" and "0" can also be understood as using different pulse signals to represent 0 and 1. The following describes several numbering methods.

[0076] (1) Reverse non-return-to-zero encoding

[0077] In the non-return-to-zero (NRZ) encoding, a high level represents a binary "1" and a low level represents a binary "0", as shown in Figure 5.

[0078] (2) Manchester encoding

[0079] Manchester coding, also known as Split-Phase Coding, represents the value of a bit by the change in level (rising / falling) during half a bit period within that bit length. A negative transition during half a bit period represents a binary "1," and a positive transition during half a bit period represents a binary "0," as shown in Figure 6.

[0080] Manchester encoding, when using carrier load modulation or backscatter modulation, is commonly used for data transmission from zero-power terminals to network devices because it facilitates detection of data transmission errors. This is because the "no change" state within the bit length is not permitted. When multiple zero-power terminals simultaneously transmit data bits with different values, the received rising and falling edges cancel each other, resulting in an uninterrupted carrier signal throughout the entire bit length. Since this state is not permitted, network devices can exploit this error to determine the specific location of the collision.

[0081] (3) Unipolar return-to-zero encoding

[0082] In unipolar return-to-zero coding, a high level in the first half of the bit period represents a binary "1," while a low level signal throughout the entire bit period represents a binary "0," as shown in Figure 7. Unipolar return-to-zero coding can be used to extract bit synchronization signals.

[0083] (4) Differential bi-phase encoding

[0084] In differential biphase encoding, any edge within a half-bit period represents a binary "0," while the absence of an edge represents a binary "1," as shown in Figure 8. Furthermore, the voltage level is inverted at the beginning of each bit period, making it easier for the receiver to reconstruct the bit beat.

[0085] (5) Miller coding

[0086] In Miller coding, any edge within half a bit period represents a binary "1," while a constant level throughout the next bit period represents a binary "0." A level transition occurs at the beginning of a bit period, as shown in Figure 9. Therefore, the bit beat is relatively easy for the receiver to reconstruct.

[0087] (6) Differential encoding

[0088] In differential encoding, each binary "1" to be transmitted causes a change in the signal level, while for a binary "0" the signal level remains unchanged.

[0089] Classification of zero-power terminals

[0090] Based on the energy source and usage of zero-power terminals, zero-power terminals can be divided into the following types:

[0091] (1) Passive zero-power terminal

[0092] Zero-power terminals do not require internal batteries. When they approach network equipment, they are within the near-field radiation generated by the network equipment's antenna. Therefore, the zero-power terminal's antenna generates an induced current through electromagnetic induction. This induced current drives the zero-power terminal's low-power computing module (also known as the low-power chip circuit) to perform tasks such as demodulating forward link signals and modulating backward link signals. For backscatter links, zero-power terminals use backscattering to transmit signals.

[0093] It can be seen that the passive zero-power terminal does not require a built-in battery to drive either the forward link or the reverse link, and is a true zero-power terminal.

[0094] Since passive zero-power terminals do not require batteries, their RF circuits and baseband circuits are very simple. For example, they do not require low-noise amplifiers (LNAs), power amplifiers (PAs), crystal oscillators, ADCs, etc. Therefore, they have many advantages such as small size, light weight, low price, and long service life.

[0095] (2) Semi-passive zero-power terminal

[0096] Semi-passive zero-power terminals do not have conventional batteries themselves, but instead use energy harvesting modules to harvest radio wave energy and store it in an energy storage unit (such as a capacitor). This energy storage unit then powers the zero-power terminal's low-power computing module (also known as a low-power chip circuit) to perform tasks such as demodulating forward link signals and modulating backward link signals. For backscatter links, the zero-power terminal uses backscattering to transmit signals.

[0097] It can be seen that the semi-passive zero-power terminal does not require a built-in battery to drive either the forward link or the reverse link. Although energy stored in capacitors is used during operation, the energy comes from the energy of radio waves collected by the energy harvesting module. Therefore, it is also a true zero-power terminal.

[0098] Semi-passive zero-power consumption terminals inherit many advantages of passive zero-power consumption terminals, and therefore have many advantages such as small size, light weight, low price, and long service life.

[0099] (3) Active zero-power terminal

[0100] In some scenarios, zero-power terminals can also be active zero-power terminals, which can have built-in batteries. The battery is used to drive the low-power computing module (i.e., low-power chip circuit) of the zero-power terminal to perform tasks such as demodulating forward link signals and modulating reverse link signals. However, for backscatter links, zero-power terminals use backscattering to transmit signals. Therefore, the zero-power nature of these terminals is primarily due to the fact that reverse link signal transmission does not require the terminal's own power, but rather uses backscattering.

[0101] Active zero-power terminals use a built-in battery to power the RF chip, increasing communication distance and improving communication reliability. Therefore, they are used in scenarios with relatively high requirements for communication distance and latency.

[0102] Cellular Passive IoT

[0103] As industry applications expand, the types of connected objects and application scenarios increase, placing higher demands on the price and power consumption of communication terminals. The application of battery-free, low-cost passive IoT devices has become a key technology for cellular IoT, expanding the types and number of network-connected terminals and truly realizing the interconnection of everything. Passive IoT devices can be based on zero-power communication technologies, such as radio frequency identification (RFID), and can be extended to suit cellular IoT.

[0104] Zero-power terminals need to collect energy from the radio waves sent by network devices, and can only drive themselves to work after obtaining energy. Therefore, before obtaining energy, the zero-power terminal is in a "shutdown" state, that is, it cannot receive signals sent by network devices, nor can it send signals to network devices. In the case of a network deploying multiple channels, after the zero-power terminal obtains energy and is "activated", it can work on any of the channels, but the network device generally only communicates with the zero-power terminal on one of the channels. In addition, when the network device sends a downlink signal, there may be frequency hopping, which can be understood as the network device reselecting the channel to send the downlink signal. As an example, as shown in Figure 10, the network deploys n+2 channels, where n is a positive integer. Among them, the power supply channel (Power Sourcing Signal, PSS) is channel 1, and the power supply channel indicates the channel where the power supply signal is located.

[0105] The network deploys multiple channels, which can also be understood as the zero-power communication system deploying multiple channels. Generally, the multiple channels are multiple narrowband channels, and the bandwidth of each channel is, for example, 250KHz. Then, 20 channels can be divided in the frequency band of 920-925MHz (i.e., 5MHz bandwidth). When the network device sends a downlink signal (such as a trigger signal), it may also receive a backscattered signal from the zero-power terminal. If the network device and the zero-power terminal send signals on the same channel or two adjacent (or similar) channels at the same time, self-interference problems of the network device may occur. As shown in Figure 11, the downlink transmission of the network device interferes with the network device's reception of the backscattered signal. Since the power of the zero-power terminal is low and the power of the network device is high, this self-interference may cause the network device to be unable to decode the data carried in the backscattered signal. How to avoid this self-interference is a key issue for the zero-power communication system. To this end, the following technical solutions of the embodiments of the present application are proposed.

[0106] To facilitate understanding of the technical solutions of the embodiments of the present application, the technical solutions of the present application are described in detail below through specific embodiments. The above related technologies can be combined arbitrarily with the technical solutions of the embodiments of the present application as optional solutions, and all of them fall within the scope of protection of the embodiments of the present application. The embodiments of the present application include at least part of the following contents.

[0107] It should be noted that the technical solution of the embodiment of the present application is applied to the backscatter communication system, which includes but is not limited to: zero-power communication system, ambient-powered IOT system, passive IOT system, etc.

[0108] It should be noted that the "terminal device" described in the embodiments of the present application includes but is not limited to: zero-power terminals, passive Internet of Things terminals, and Internet of Things terminals based on ambient energy; for example, wireless radio frequency identification (RFID) devices. A typical RFID device is an RFID tag, which is also called a "radio frequency tag" or "electronic tag."

[0109] It should be noted that the network devices in the embodiments of the present application may be base stations, access nodes, transmission and receiving points (TRPs), and other devices.

[0110] FIG12 is a flow chart of a communication method according to an embodiment of the present application. As shown in FIG12 , the communication method includes the following steps:

[0111] Step 1201: The network device sends a first signal to the terminal device; the terminal device receives the first signal sent by the network device.

[0112] In some implementations, the first signal may be a trigger signal. Here, the implementation of the trigger signal may refer to the description of the aforementioned related art.

[0113] Step 1202: The terminal device sends a second signal to the network device; the network device receives the second signal sent by the terminal device; the second signal is a backscattered signal of the first signal; wherein the channel where the second signal is located satisfies the first constraint, and / or the time domain position where the second signal is located satisfies the second constraint.

[0114] In some implementations, the second signal may be a signal dispatched (or triggered) by the first signal, i.e., the first signal is used to trigger the terminal device to send the second signal to the network device. As an example, the second signal carries information reported by the terminal device to the network device. Here, the type of information reported by the terminal device to the network device can be implemented based on the specific application, such as location, logistics status, environmental information, etc.

[0115] In some implementations, the network deploys multiple channels (eg, N channels, where N is an integer greater than 1), where the channels may be cell channels (ie, multiple channels do not distinguish between uplink and downlink).

[0116] In some implementations, the network deploys multiple downlink channels and / or multiple uplink channels (eg, N1 downlink channels and / or N2 uplink channels, where N1 and N2 are integers greater than 1).

[0117] In the embodiment of the present application, the channel where the second signal is located satisfies the first constraint, and / or the time domain location where the second signal is located satisfies the second constraint. In this way, the second signal (i.e., the backscattered signal) can be prevented from causing self-interference to the network device. The specific implementation of the first constraint and the second constraint is described below.

[0118] Solution 1: Frequency domain related constraints (i.e. the first constraint)

[0119] Plan 1-1

[0120] In some implementations, the first constraint includes: the channel where the second signal is located is a channel in a first part of channels; and the first part of channels is a channel used for uplink transmission in channels deployed by the network.

[0121] In some embodiments, the first portion of channels and / or the second portion of channels and / or the third portion of channels are determined based on the first information. Based on this, the terminal device determines the first portion of channels and / or the second portion of channels and / or the third portion of channels based on the first information; the second portion of channels is a channel used for downlink transmission among the channels deployed by the network; and the third portion of channels is a channel used for uplink and downlink guard intervals among the channels deployed by the network.

[0122] Here, the first part of the channel is used for the terminal device to send uplink signals (i.e., backscattered signals) and / or the network device to receive uplink signals (i.e., backscattered signals), and belongs to the uplink channel (or called backscatter channel); the second part of the channel is used for the terminal device to receive downlink signals and / or the network device to send downlink signals, and belongs to the downlink channel; the third part of the channel is used for the uplink and downlink protection interval, and belongs to the uplink and downlink protection channel. Here, the uplink and downlink protection channels can also have other names, such as idle channels, interval channels, etc.

[0123] The above scheme uses frequency domain isolation to make the channel used for downlink transmission and the channel used for uplink transmission non-adjacent. In this way, it can ensure that the channel where the downlink signal sent by the network device is located and the channel where the uplink backscatter signal (i.e., the second signal) sent by the terminal device is located are not adjacent, thereby avoiding the self-interference problem caused by the second signal (i.e., the backscatter signal) to the network device.

[0124] As an example, as shown in Figure 13, the network deploys 20 channels (CHs), which are numbered 0 to 19 in sequence from low frequency to high frequency. CH0 to CH4 are used for downlink transmission, CH5 is an interval channel, and CH6 to CH19 are used for uplink transmission.

[0125] In the embodiment of the present application, the channels deployed in the network can be numbered sequentially from low frequency to high frequency, or from high frequency to low frequency, wherein the numbering can start from 0 or from 1.

[0126] The following explains how to determine the first, second, and third portions of channels. It should be noted that only two of these three channels can be determined, and the channels deployed on the network other than these two portions are considered another type of channel. For example, if only the first and second portions of channels are determined, the channels deployed on the network other than these two portions are considered the third portion of channels. For example, if only the first and third portions of channels are determined, the channels deployed on the network other than these two portions are considered the second portion of channels. For example, if only the second and third portions of channels are determined, the channels deployed on the network other than these two portions are considered the first portion of channels. The third portion of channels is located between the first and second portions of channels.

[0127] In some embodiments, the first information is used to determine at least one of the following: the number of channels in the first portion of channels; the starting channel position of the first portion of channels; the number of channels in the second portion of channels; the starting channel position of the second portion of channels; and the number of channels in the third portion of channels.

[0128] In some embodiments, the first information includes at least one of the following parameters:

[0129] A first parameter, wherein the first parameter represents the number of channels deployed in the network;

[0130] a second parameter representing a proportion factor corresponding to the first part of channels;

[0131] a third parameter representing the number of channels in the first part of channels;

[0132] a fourth parameter representing a proportion factor corresponding to the second part of channels;

[0133] a fifth parameter representing the number of channels in the second part of channels;

[0134] a sixth parameter, wherein the sixth parameter represents a proportion factor corresponding to the third part of channels;

[0135] A seventh parameter represents the number of channels in the third part of channels.

[0136] In some embodiments, the number of channels in the first portion of channels is determined based on the first parameter and the second parameter; or the number of channels in the first portion of channels is determined based on the third parameter.

[0137] In some embodiments, the number of channels in the second portion of channels is determined based on the first parameter and the fourth parameter; or the number of channels in the second portion of channels is determined based on the fifth parameter.

[0138] In some embodiments, the number of channels in the third portion of channels is determined based on the first parameter and the sixth parameter; or the number of channels in the third portion of channels is determined based on the seventh parameter.

[0139] In some embodiments, the first information includes first indication information and / or second indication information; the first indication information is used to indicate that the starting channel of the first portion of channels is the lowest frequency channel among the channels deployed by the network, or the starting channel of the first portion of channels is the highest frequency channel among the channels deployed by the network; the second indication information is used to indicate the channel index of the starting channel of the first portion of channels and / or whether the first portion of channels is a continuous channel starting from the channel index in the high-frequency direction or the low-frequency direction. Based on this, the starting channel position of the first portion of channels is determined based on the first indication information and / or the second indication information.

[0140] In some embodiments, the first information includes third indication information and / or fourth indication information; the third indication information is used to indicate that the starting channel of the second portion of channels is the highest frequency channel among the channels deployed by the network, or the starting channel of the second portion of channels is the lowest frequency channel among the channels deployed by the network; the fourth indication information is used to indicate the channel index of the starting channel of the second portion of channels and / or whether the first portion of channels is a continuous channel starting from the channel index in the high-frequency direction or the low-frequency direction. Based on this, the starting channel position of the second portion of channels is determined based on the third indication information and / or the fourth indication information.

[0141] Part I Channel

[0142] In some embodiments, the first information is used to determine at least one of the following: the number of channels in the first portion of channels; and a starting channel position of the first portion of channels.

[0143] Here, the number of channels in the first part of channels can be determined in the following manner:

[0144] Option 1-1) In some embodiments, the first information includes a first parameter and a second parameter; the first parameter represents the number of channels deployed in the network; the second parameter represents the proportion factor corresponding to the first part of the channels; the number of channels in the first part of the channels is determined based on the first parameter and the second parameter.

[0145] As an example: The number of channels in the first part of channels is determined by the following formula:

[0146] M1 = floor(N / S1); or, M1 = ceil(N / S1)

[0147] Among them, M1 represents the number of channels in the first part; N represents the first parameter, that is, the number of channels deployed in the network; S1 represents the second parameter, that is, the proportion factor corresponding to the first part of channels.

[0148] Option 1-2) In some embodiments, the first information includes a third parameter; the third parameter represents the number of channels in the first portion of channels; and the number of channels in the first portion of channels is determined based on the third parameter.

[0149] As an example, the number of channels in the first part of channels is M1, and M1 represents the third parameter, that is, the number of channels in the first part of channels.

[0150] Here, the starting channel position of the first part of channels can be determined in the following manner:

[0151] Option 2-1) In some embodiments, the first information includes first indication information, and the first indication information is used to indicate that the starting channel of the first part of the channels is the channel with the lowest frequency among the channels deployed by the network, or the starting channel of the first part of the channels is the channel with the highest frequency among the channels deployed by the network; the starting channel position of the first part of the channels is determined based on the first indication information.

[0152] Option 2-2) In some embodiments, the first information includes second indication information, and the second indication information is used to indicate the channel index of the starting channel of the first part of the channels and / or whether the first part of the channels is a continuous channel starting from the channel index to the high frequency direction or the low frequency direction; the starting channel position of the first part of the channels is determined based on the second indication information.

[0153] In the above solution, at least part of the content of the first information is agreed upon by the protocol, and / or at least part of the content of the first information is determined based on the operating spectrum of the terminal device, and / or at least part of the content of the first information is configured through a downlink signal of the network device. The downlink signal can be a trigger signal, system information, paging message, downlink beacon frame, or any downlink signal sent by the network device.

[0154] The second part of the channel

[0155] In some embodiments, the first information is used to determine at least one of the following: the number of channels in the second portion of channels; and a starting channel position of the second portion of channels.

[0156] Here, the number of channels in the second part can be determined in the following manner:

[0157] Option 1-1) In some embodiments, the first information includes a first parameter and a fourth parameter; the first parameter represents the number of channels deployed in the network; the fourth parameter represents the proportion factor corresponding to the second part of the channels; the number of channels in the second part of the channels is determined based on the first parameter and the fourth parameter.

[0158] As an example: the number of channels in the second part of channels is determined by the following formula:

[0159] M2 = floor(N / S2); or, M2 = ceil(N / S2)

[0160] Among them, M2 represents the number of channels in the second part; N represents the first parameter, that is, the number of channels deployed in the network; S2 represents the fourth parameter, that is, the proportion factor corresponding to the second part of the channels.

[0161] Option 1-2) In some embodiments, the first information includes a fifth parameter; the fifth parameter represents the number of channels in the second portion of channels; and the number of channels in the second portion of channels is determined based on the fifth parameter.

[0162] As an example, the number of channels in the second part of channels is M2, and M2 represents the fifth parameter, that is, the number of channels in the second part of channels.

[0163] Here, the starting channel position of the second part of channels can be determined in the following manner:

[0164] Option 2-1) In some embodiments, the first information includes third indication information, and the third indication information is used to indicate that the starting channel of the second part of the channels is the channel with the highest frequency among the channels deployed by the network, or the starting channel of the second part of the channels is the channel with the lowest frequency among the channels deployed by the network; the starting channel position of the second part of the channels is determined based on the third indication information.

[0165] Option 2-2) In some embodiments, the first information includes fourth indication information, and the fourth indication information is used to indicate the channel index of the starting channel of the second part of the channel and / or whether the second part of the channel is a continuous channel starting from the channel index to the high frequency direction or the low frequency direction; the starting channel position of the second part of the channel is determined based on the fourth indication information.

[0166] In the above solution, at least part of the content of the first information is agreed upon by the protocol, and / or at least part of the content of the first information is determined based on the operating spectrum of the terminal device, and / or at least part of the content of the first information is configured through a downlink signal of the network device. The downlink signal can be a trigger signal, system information, paging message, downlink beacon frame, or any downlink signal sent by the network device.

[0167] Part 3 Channel

[0168] In some embodiments, the first information is used to determine the number of channels in the third portion of channels; the third portion of channels is located between the first portion of channels and the second portion of channels.

[0169] Here, the number of channels in the third part of channels can be determined in the following manner:

[0170] Option 1-1) In some embodiments, the first information includes a first parameter and a sixth parameter; the first parameter represents the number of channels deployed in the network; the sixth parameter represents the proportion factor corresponding to the third part of the channels; the number of channels in the third part of the channels is determined based on the first parameter and the sixth parameter.

[0171] As an example: The number of channels in the third part of the channel is determined by the following formula:

[0172] M3=floor(N / S3); or, M3=ceil(N / S3)

[0173] Among them, M3 represents the number of channels in the third part; N represents the first parameter, that is, the number of channels deployed in the network; S3 represents the sixth parameter, that is, the proportion factor corresponding to the third part of the channels.

[0174] Option 1-2) In some implementations, the first information includes a seventh parameter; the seventh parameter represents the number of channels in the third portion of channels; and the number of channels in the third portion of channels is determined based on the seventh parameter.

[0175] As an example, the number of channels in the third part of channels is M3, and M3 represents the seventh parameter, that is, the number of channels in the third part of channels.

[0176] In the above solution, at least part of the content of the first information is agreed upon by the protocol, and / or at least part of the content of the first information is determined based on the operating spectrum of the terminal device, and / or at least part of the content of the first information is configured through a downlink signal of the network device. The downlink signal can be a trigger signal, system information, paging message, downlink beacon frame, or any downlink signal sent by the network device.

[0177] Through the above solution, a channel pattern of network deployment can be determined, based on which the terminal device selects a channel for sending the second signal from the first part of channels.

[0178] In one example: at least one of the following information is agreed upon through a protocol: the number of channels N deployed in the network, the proportion factor S1 corresponding to the first part of the channels, the proportion factor S2 corresponding to the second part of the channels, the proportion factor S3 corresponding to the third part of the channels, the number of channels M1 in the first part of the channels, the number of channels M2 in the second part of the channels, the number of channels M3 in the third part of the channels, whether the first part of the channels starts from low frequency or high frequency (M1), whether the second part of the channels starts from low frequency or high frequency (M2), the starting channel index of the first part of the channels, and the starting channel index of the second part of the channels.

[0179] In one example: at least one of the following information is determined based on the working spectrum of the terminal device: the number of channels N deployed by the network, the proportion factor S1 corresponding to the first part of the channels, the proportion factor S2 corresponding to the second part of the channels, the proportion factor S3 corresponding to the third part of the channels, the number of channels M1 in the first part of the channels, the number of channels M2 in the second part of the channels, the number of channels M3 in the third part of the channels, whether the first part of the channels starts from the low frequency or the high frequency (M1), whether the second part of the channels starts from the low frequency or the high frequency (M2), the starting channel index of the first part of the channels, and the starting channel index of the second part of the channels. Here, the spectrum and the above information have a mapping relationship, and the above information corresponding to the spectrum can be determined based on the mapping relationship.

[0180] In one example: based on the configuration information carried in the trigger signal, system information, paging message, downlink beacon frame, or any downlink signal sent by the network device, at least one of the following information is determined: the number of channels N deployed by the network, the proportion factor S1 corresponding to the first part of the channels, the proportion factor S2 corresponding to the second part of the channels, the proportion factor S3 corresponding to the third part of the channels, the number of channels M1 of the first part of the channels, the number of channels M2 of the second part of the channels, the number of channels M3 of the third part of the channels, whether the first part of the channels starts from low frequency or high frequency M1, whether the second part of the channels starts from low frequency or high frequency M2, the starting channel index of the first part of the channels, and the starting channel index of the second part of the channels. Here, the spectrum and the above information have a mapping relationship, and the above information corresponding to the spectrum can be determined based on the mapping relationship.

[0181] Plan 1-2

[0182] In some embodiments, the first constraint includes: the channel where the second signal is located is a channel other than the fourth part of channels in the channels deployed by the network, and / or the signal where the second signal is located is a channel in the fifth part of channels in the channels deployed by the network.

[0183] In some embodiments, the fourth portion of channels is a channel used by the network device for the most recent one or more downlink transmissions after the first signal was sent. Here, the first signal carries second information, and the second information is used to indicate the fourth portion of channels.

[0184] Based on this, the terminal device selects a channel for sending the second signal from the channels deployed in the network except for the fourth part of channels.

[0185] In one example: when a terminal device receives a trigger signal from a network device, the terminal device cares about whether the channel used by the network device to send the downlink signal for the next time or the nth time is in the same channel or adjacent channel as the channel used by the terminal device to send the backscatter signal this time, and is affected by channel leakage interference. Based on this consideration, the network device carries a piece of information (i.e., the second information) in the downlink signal (i.e., the first signal) sent this time, which indicates the pre-selected channel (i.e., the fourth part of the channel) for the most recent or nth downlink transmission. When the terminal device performs backscattering based on this downlink signal, it avoids the channel indicated by the network device (i.e., the fourth part of the channel) when making channel selection for the reverse reflection signal (i.e., the second signal).

[0186] In some embodiments, the fourth portion of channels is a channel that the terminal device is not permitted to use, and the fifth portion of channels is a channel that the terminal device is permitted to use. Here, the first signal carries second information and / or third information, the second information is used to indicate the fourth portion of channels, and the third information is used to indicate the fifth portion of channels.

[0187] Based on this, the terminal device selects a channel for sending the second signal from the channels deployed in the network except the fourth part of the channels; and / or the terminal device selects a channel for sending the second signal from the fifth part of the channels deployed in the network.

[0188] In one example: when a terminal device receives a trigger signal from a network device, the terminal device cares whether the channel used by the network device to send the downlink signal the next time or the nth time is in the same channel or adjacent channel as the channel used by the terminal device to send the backscatter signal this time, and is affected by channel leakage. Based on this consideration, the network device carries information (i.e., the second information and / or the third information) in the downlink signal (i.e., the first signal) sent this time, and uses this information to instruct the terminal device to select a whitelist (i.e., the fifth part of the channel) and / or a blacklist (i.e., the fourth part of the channel) of the channels allowed to be selected based on the backscatter sent this time. If the network device provides a whitelist, then when the terminal device performs backscattering based on this downlink signal, when selecting a channel for the backreflected signal (i.e., the second signal), the channel in the whitelist is selected for backscattering. If the network device provides a blacklist, then when the terminal device performs backscattering based on this downlink signal, when selecting a channel for the backreflected signal (i.e., the second signal), the channel in the blacklist is avoided from being backscattered.

[0189] Solution 2: Time-related constraints (i.e., the second constraint)

[0190] In some embodiments, the second constraint includes: the time domain position of the second signal does not overlap with the first time domain position, or the time domain position of the second signal does not fall within the first time window.

[0191] In some implementations, the first time domain position is the time domain position used by the network device for the most recent one or more downlink transmissions after the first signal is sent.

[0192] In some embodiments, the first time domain position can be determined by the following scheme: the first signal carries fourth information, and the fourth information is used to indicate the first time domain position or the time interval between the first time domain position and the time domain position where the first signal is located.

[0193] In some embodiments, the first time window may be determined by:

[0194] Option 1) In some embodiments, the first signal carries fifth information, and the fifth information is used to indicate at least one of the following: the start time of the first time window, the end time of the first time window, and the duration of the first time window.

[0195] Option 2) In some embodiments, the start time of the first time window is determined based on the first time domain position and the first duration; and / or the end time of the first time window is determined based on the first time domain position and the second duration. Specifically, the first signal carries sixth information, the sixth information being used to indicate at least one of the following: a first duration between the start time of the first time window and the first time domain position; or a second duration between the end time of the first time window and the first time domain position.

[0196] Based on the above solution, the terminal device selects the first time domain position or a time domain position outside the first time window as the time domain position for sending the second signal.

[0197] In one example: when a terminal device receives a trigger signal from a network device, the terminal device cares about whether the channel used by the network device to send the downlink signal for the next time or the nth time is in the same channel or adjacent channel as the channel used by the terminal device to send the backscatter signal this time, and is affected by channel leakage interference. Based on this consideration, the network device carries information (i.e., fourth information) in the downlink signal (i.e., the first signal) sent this time, and the time interval between the next or nth downlink transmission of the network device and the current downlink transmission is indicated by the information. According to the information and the timing of the current downlink transmission, the time of the next or nth downlink transmission of the network device (called the target time) can be determined. When the terminal device performs backscattering based on the current downlink signal, when making time selection for the reverse reflection signal (i.e., the second signal), it avoids reverse reflection at the target time. Furthermore, the network device may also carry other information (i.e., the fifth information or the sixth information) in the downlink signal (i.e., the first signal) sent this time, and use this information to indicate a time window (Time Window), which is the time period defined by the t1 time period before and / or the t2 time period after the target time (as shown in Figure 14). When the terminal device performs backscattering based on this downlink signal, when making time selection for the reverse reflected signal (i.e., the second signal), it avoids reverse reflection at all times within the time window.

[0198] Solution 3: Time-frequency domain related constraints (i.e., mixed constraints of the first and second constraints)

[0199] The above-mentioned options 1 and 2 can be implemented in combination.

[0200] Plan 3-1

[0201] In some embodiments, if the time domain position selected by the terminal device for the second signal does not satisfy the second constraint, the terminal device selects a channel that satisfies the first constraint for the second signal; if the time domain position selected by the terminal device for the second signal satisfies the second constraint, the terminal device selects any one channel from the channels deployed in the network as the channel for sending the second signal.

[0202] Plan 3-2

[0203] In some embodiments, if the channel selected by the terminal device for the second signal does not satisfy the first constraint, the terminal device selects a time domain position for the second signal that satisfies the second constraint; if the channel selected by the terminal device for the second signal satisfies the first constraint, the terminal device selects any time domain position as the time domain position for sending the second signal.

[0204] In one example: when a terminal device receives a trigger signal from a network device, the terminal device cares whether the channel used by the network device to send the downlink signal for the next time or the nth time is in the same channel or adjacent channel as the channel used by the terminal device to send the backscatter signal this time, and is affected by channel leakage. Based on this consideration, the network device carries information 1 (i.e., the fourth information, the fifth information, the sixth information) and information 2 (i.e., the second information, the third information) in the downlink signal (i.e., the first signal) sent this time; information 1 indicates the second constraint, such as the time interval between the next or the nth downlink transmission of the network device and the current downlink transmission, and / or indicates a time window; information 2 indicates the first constraint, such as the whitelist and / or blacklist of channels that the terminal device is allowed to select based on the backscatter of the current downlink transmission. The terminal device selects a channel and time domain location to send a backscatter signal based on Information 1 and Information 2. Specifically, if the time at which the terminal device performs backscattering overlaps or completely overlaps with the time or time window specified in Information 1, the terminal device can only select a channel from the whitelist specified in Information 2 to send the backscatter signal, or a channel outside the blacklist specified in Information 2 to send the backscatter signal. If the time at which the terminal device performs backscattering does not overlap with the time or time window specified in Information 1, the terminal device's channel selection is not constrained by Information 2. As shown in Figure 15, the current downlink transmission of the network device is DL1, the next downlink transmission of the network device is DL2, and the backscatter of the terminal device for DL1 is UL1. If the time of UL1 overlaps with the time of DL1 or falls within a time window near DL1, the channel for UL1 needs to be selected from the whitelist or a channel outside the blacklist. Otherwise, the channel for UL1 is not constrained by the blacklist or whitelist.

[0205] The preferred embodiments of the present application are 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 technical concept of the present application, the technical solution of the present application can be subjected to a variety of simple modifications, and these simple modifications all fall within the scope of protection of the present application. For example, the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present application will no longer describe the various possible combinations separately. For another example, the various different embodiments of the present application can also be arbitrarily combined, as long as they do not violate the idea of ​​the present application, they should also be regarded as the contents disclosed in the present application. For another example, under the premise of no conflict, the various embodiments and / or the technical features in each embodiment described in the present application can be arbitrarily combined with the prior art, and the technical solution obtained after the combination should also fall within the scope of protection of the present application.

[0206] 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 imply a precedence in the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application. In addition, in the embodiments of the present application, the terms "downlink," "uplink," and "sidelink" are used to indicate the transmission direction of signals or data, where "downlink" is used to indicate the first direction of transmission of signals or data from a site to a user equipment in a cell, "uplink" is used to indicate the second direction of transmission of signals or data from a user equipment in a cell to a site, and "sidelink" is used to indicate the third direction of transmission of signals or data from user equipment 1 to user equipment 2. For example, "downlink signal" indicates that the transmission direction of the signal is the first direction. In addition, in the embodiments of the present application, the term "and / or" is merely a description of the association relationship between associated objects, indicating that three relationships can exist. Specifically, A and / or B can represent three situations: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this document generally indicates that the associated objects are in an "or" relationship.

[0207] FIG16 is a schematic diagram of the first structure of a communication device provided in an embodiment of the present application, which is applied to a terminal device in a zero-power communication system. As shown in FIG16 , the communication device includes:

[0208] The receiving unit 1601 is configured to receive a first signal sent by a network device;

[0209] The sending unit 1602 is configured to send a second signal to the network device; the second signal is a backscattered signal of the first signal;

[0210] The channel where the second signal is located satisfies a first constraint, and / or the time domain position where the second signal is located satisfies a second constraint.

[0211] In some implementations, the first constraint includes: the channel where the second signal is located is a channel in a first part of channels; and the first part of channels is a channel used for uplink transmission in channels deployed by the network.

[0212] In some embodiments, the apparatus further includes: a determining unit configured to determine the first portion of channels and / or the second portion of channels and / or the third portion of channels based on the first information;

[0213] The second part of the channels is a channel used for downlink transmission in the channels deployed by the network; the third part of the channels is a channel used for uplink and downlink protection intervals in the channels deployed by the network.

[0214] In some embodiments, the first information is used to determine at least one of the following:

[0215] the number of channels in the first portion of channels;

[0216] a starting channel position of the first part of channels;

[0217] the number of channels in the second portion of channels;

[0218] a starting channel position of the second part of channels;

[0219] The number of channels in the third part of channels.

[0220] In some embodiments, the first information includes at least one of the following parameters:

[0221] A first parameter, wherein the first parameter represents the number of channels deployed in the network;

[0222] a second parameter representing a proportion factor corresponding to the first part of channels;

[0223] a third parameter representing the number of channels in the first part of channels;

[0224] a fourth parameter representing a proportion factor corresponding to the second part of channels;

[0225] a fifth parameter representing the number of channels in the second part of channels;

[0226] a sixth parameter, wherein the sixth parameter represents a proportion factor corresponding to the third part of channels;

[0227] A seventh parameter represents the number of channels in the third part of channels.

[0228] In some embodiments, the number of channels in the first portion of channels is determined based on the first parameter and the second parameter; or the number of channels in the first portion of channels is determined based on the third parameter.

[0229] In some embodiments, the number of channels in the second portion of channels is determined based on the first parameter and the fourth parameter; or the number of channels in the second portion of channels is determined based on the fifth parameter.

[0230] In some embodiments, the number of channels in the third portion of channels is determined based on the first parameter and the sixth parameter; or the number of channels in the third portion of channels is determined based on the seventh parameter.

[0231] In some embodiments, the first information includes first indication information and / or second indication information; the first indication information is used to indicate that the starting channel of the first part of channels is the channel with the lowest frequency among the channels deployed by the network, or the starting channel of the first part of channels is the channel with the highest frequency among the channels deployed by the network; the second indication information is used to indicate the channel index of the starting channel of the first part of channels and / or whether the first part of channels is a continuous channel starting from the channel index to the high frequency direction or the low frequency direction.

[0232] In some embodiments, the starting channel position of the first part of channels is determined based on the first indication information and / or the second indication information.

[0233] In some embodiments, the first information includes third indication information and / or fourth indication information; the third indication information is used to indicate that the starting channel of the second part of the channels is the channel with the highest frequency among the channels deployed by the network, or the starting channel of the second part of the channels is the channel with the lowest frequency among the channels deployed by the network; the fourth indication information is used to indicate the channel index of the starting channel of the second part of the channels and / or whether the first part of the channels is a continuous channel starting from the channel index to the high frequency direction or the low frequency direction.

[0234] In some implementations, the starting channel position of the second portion of channels is determined based on the third indication information and / or the fourth indication information.

[0235] In some embodiments, the third portion of channels is located between the first portion of channels and the second portion of channels.

[0236] In some embodiments, at least part of the content of the first information is agreed upon by the protocol, and / or at least part of the content of the first information is determined based on the operating spectrum of the terminal device, and / or at least part of the content of the first information is configured through the downlink signal of the network device.

[0237] In some embodiments, the apparatus further includes: a selection unit configured to select a channel for sending the second signal from the first portion of channels.

[0238] In some embodiments, the first constraint includes: the channel where the second signal is located is a channel other than the fourth part of channels in the channels deployed by the network, and / or the signal where the second signal is located is a channel in the fifth part of channels in the channels deployed by the network.

[0239] In some implementations, the fourth portion of channels is a channel used by the network device for the most recent one or more downlink transmissions after the first signal was sent.

[0240] In some implementations, the fourth portion of channels are channels that the terminal device is not allowed to use, and the fifth portion of channels are channels that the terminal device is allowed to use.

[0241] In some embodiments, the first signal carries second information and / or third information, the second information is used to indicate the fourth portion of channels, and the third information is used to indicate the fifth portion of channels.

[0242] In some embodiments, the device further includes: a selection unit for selecting a channel for sending the second signal from channels other than the fourth part of channels in the channels deployed in the network; and / or, selecting a channel for sending the second signal from the fifth part of channels in the channels deployed in the network.

[0243] In some embodiments, the second constraint includes: the time domain position of the second signal does not overlap with the first time domain position, or the time domain position of the second signal does not fall within the first time window.

[0244] In some implementations, the first time domain position is the time domain position used by the network device for the most recent one or more downlink transmissions after the first signal is sent.

[0245] In some embodiments, the first signal carries fourth information, where the fourth information is used to indicate the first time domain position or the time interval between the first time domain position and the time domain position where the first signal is located.

[0246] In some embodiments, the start time of the first time window is determined based on the first time domain position and the first duration; and / or the end time of the first time window is determined based on the first time domain position and the second duration.

[0247] In some embodiments, the first signal carries fifth information, and the fifth information is used to indicate at least one of the following: the start time of the first time window, the end time of the first time window, and the duration of the first time window.

[0248] In some embodiments, the first signal carries sixth information, where the sixth information is used to indicate at least one of the following:

[0249] a first duration between the start time of the first time window and the first time domain position;

[0250] A second duration between the end time of the first time window and the first time domain position.

[0251] In some embodiments, the apparatus further includes: a selection unit, configured to select the first time domain position or a time domain position outside the first time window as the time domain position for sending the second signal.

[0252] In some embodiments, the selection unit is configured to select a channel that satisfies the first constraint for the second signal if the time domain position selected for the second signal does not satisfy the second constraint; and to select any one of the channels deployed in the network as the channel for sending the second signal if the time domain position selected for the second signal satisfies the second constraint.

[0253] In some embodiments, the selection unit is configured to select a time domain position for the second signal that satisfies the second constraint if the channel selected for the second signal does not satisfy the first constraint; and to select any time domain position as the time domain position for sending the second signal if the channel selected for the second signal satisfies the first constraint.

[0254] Those skilled in the art should understand that the relevant description of the above-mentioned communication device in the embodiment of the present application can be understood with reference to the relevant description of the communication method in the embodiment of the present application.

[0255] FIG17 is a second schematic diagram of the structure of a communication device provided in an embodiment of the present application, which is applied to a network device in a zero-power communication system. As shown in FIG17 , the communication device includes:

[0256] The sending unit 1701 is configured to send a first signal to a terminal device;

[0257] The receiving unit 1702 is configured to receive a second signal sent by the terminal device; the second signal is a backscattered signal of the first signal;

[0258] The channel where the second signal is located satisfies a first constraint, and / or the time domain position where the second signal is located satisfies a second constraint.

[0259] In some implementations, the first constraint includes: the channel where the second signal is located is a channel in a first part of channels; and the first part of channels is a channel used for uplink transmission in channels deployed by the network.

[0260] In some embodiments, the first part of the channel and / or the second part of the channel and / or the third part of the channel is determined based on the first information; the second part of the channel is a channel used for downlink transmission in the channel deployed by the network; and the third part of the channel is a channel used for uplink and downlink protection intervals in the channel deployed by the network.

[0261] In some embodiments, the first information is used to determine at least one of the following:

[0262] the number of channels in the first portion of channels;

[0263] a starting channel position of the first part of channels;

[0264] the number of channels in the second portion of channels;

[0265] a starting channel position of the second part of channels;

[0266] The number of channels in the third part of channels.

[0267] In some embodiments, the first information includes at least one of the following parameters:

[0268] A first parameter, wherein the first parameter represents the number of channels deployed in the network;

[0269] a second parameter representing a proportion factor corresponding to the first part of channels;

[0270] a third parameter representing the number of channels in the first part of channels;

[0271] a fourth parameter representing a proportion factor corresponding to the second part of channels;

[0272] a fifth parameter representing the number of channels in the second part of channels;

[0273] a sixth parameter, wherein the sixth parameter represents a proportion factor corresponding to the third part of channels;

[0274] A seventh parameter represents the number of channels in the third part of channels.

[0275] In some embodiments, the number of channels in the first portion of channels is determined based on the first parameter and the second parameter; or the number of channels in the first portion of channels is determined based on the third parameter.

[0276] In some embodiments, the number of channels in the second portion of channels is determined based on the first parameter and the fourth parameter; or the number of channels in the second portion of channels is determined based on the fifth parameter.

[0277] In some embodiments, the number of channels in the third portion of channels is determined based on the first parameter and the sixth parameter; or the number of channels in the third portion of channels is determined based on the seventh parameter.

[0278] In some embodiments, the first information includes first indication information and / or second indication information;

[0279] The first indication information is used to indicate that a starting channel of the first part of channels is a channel with the lowest frequency among the channels deployed by the network, or that a starting channel of the first part of channels is a channel with the highest frequency among the channels deployed by the network;

[0280] The second indication information is used to indicate the channel index of the starting channel of the first part of channels and / or whether the first part of channels is a continuous channel starting from the channel index in the high frequency direction or the low frequency direction.

[0281] In some embodiments, the starting channel position of the first part of channels is determined based on the first indication information and / or the second indication information.

[0282] In some embodiments, the first information includes third indication information and / or fourth indication information;

[0283] The third indication information is used to indicate that the starting channel of the second part of channels is the channel with the highest frequency among the channels deployed by the network, or the starting channel of the second part of channels is the channel with the lowest frequency among the channels deployed by the network;

[0284] The fourth indication information is used to indicate the channel index of the starting channel of the second part of channels and / or whether the first part of channels is a continuous channel starting from the channel index in the high frequency direction or the low frequency direction.

[0285] In some implementations, the starting channel position of the second portion of channels is determined based on the third indication information and / or the fourth indication information.

[0286] In some embodiments, the third portion of channels is located between the first portion of channels and the second portion of channels.

[0287] In some embodiments, at least part of the content of the first information is agreed upon by the protocol, and / or at least part of the content of the first information is determined based on the operating spectrum of the terminal device, and / or at least part of the content of the first information is configured through the downlink signal of the network device.

[0288] In some embodiments, the first constraint includes: the channel where the second signal is located is a channel other than the fourth part of channels in the channels deployed by the network, and / or the signal where the second signal is located is a channel in the fifth part of channels in the channels deployed by the network.

[0289] In some implementations, the fourth portion of channels is a channel used by the network device for the most recent one or more downlink transmissions after the first signal was sent.

[0290] In some implementations, the fourth portion of channels are channels that the terminal device is not allowed to use, and the fifth portion of channels are channels that the terminal device is allowed to use.

[0291] In some embodiments, the first signal carries second information and / or third information, the second information is used to indicate the fourth portion of channels, and the third information is used to indicate the fifth portion of channels.

[0292] In some embodiments, the second constraint includes: the time domain position of the second signal does not overlap with the first time domain position, or the time domain position of the second signal does not fall within the first time window.

[0293] In some implementations, the first time domain position is the time domain position used by the network device for the most recent one or more downlink transmissions after the first signal is sent.

[0294] In some embodiments, the first signal carries fourth information, where the fourth information is used to indicate the first time domain position or the time interval between the first time domain position and the time domain position where the first signal is located.

[0295] In some embodiments, the start time of the first time window is determined based on the first time domain position and the first duration; and / or the end time of the first time window is determined based on the first time domain position and the second duration.

[0296] In some embodiments, the first signal carries fifth information, and the fifth information is used to indicate at least one of the following: the start time of the first time window, the end time of the first time window, and the duration of the first time window.

[0297] In some embodiments, the first signal carries sixth information, where the sixth information is used to indicate at least one of the following:

[0298] a first duration between the start time of the first time window and the first time domain position;

[0299] A second duration between the end time of the first time window and the first time domain position.

[0300] Those skilled in the art should understand that the relevant description of the above-mentioned communication device in the embodiment of the present application can be understood with reference to the relevant description of the communication method in the embodiment of the present application.

[0301] Figure 18 is a schematic diagram of a communication device 1800 provided in an embodiment of the present application. The communication device can be a terminal device or a network device. The communication device 1800 shown in Figure 18 includes a processor 1810, which can call and execute a computer program from a memory to implement the method in the embodiment of the present application.

[0302] Optionally, as shown in FIG18 , the communication device 1800 may further include a memory 1820. The processor 1810 may call and execute a computer program from the memory 1820 to implement the method in the embodiment of the present application.

[0303] The memory 1820 may be a separate device independent of the processor 1810 , or may be integrated into the processor 1810 .

[0304] Optionally, as shown in FIG18 , the communication device 1800 may further include a transceiver 1830 , and the processor 1810 may control the transceiver 1830 to communicate with other devices, specifically, to send information or data to other devices, or to receive information or data sent by other devices.

[0305] The transceiver 1830 may include a transmitter and a receiver. The transceiver 1830 may further include an antenna, and the number of antennas may be one or more.

[0306] Optionally, the communication device 1800 may specifically be a network device in an embodiment of the present application, and the communication device 1800 may implement the corresponding processes implemented by the network device in each method in the embodiment of the present application. For the sake of brevity, they will not be repeated here.

[0307] Optionally, the communication device 1800 may specifically be a mobile terminal / terminal device of an embodiment of the present application, and the communication device 1800 may implement the corresponding processes implemented by the mobile terminal / terminal device in each method of the embodiment of the present application. For the sake of brevity, they will not be repeated here.

[0308] Figure 19 is a schematic structural diagram of a chip according to an embodiment of the present application. The chip 1900 shown in Figure 19 includes a processor 1910, which can call and run a computer program from a memory to implement the method according to the embodiment of the present application.

[0309] Optionally, as shown in FIG19 , the chip 1900 may further include a memory 1920. The processor 1910 may call and execute a computer program from the memory 1920 to implement the method in the embodiment of the present application.

[0310] The memory 1920 may be a separate device independent of the processor 1910 , or may be integrated into the processor 1910 .

[0311] Optionally, the chip 1900 may further include an input interface 1930. The processor 1910 may control the input interface 1930 to communicate with other devices or chips, and specifically, may obtain information or data sent by other devices or chips.

[0312] Optionally, the chip 1900 may further include an output interface 1940. The processor 1910 may control the output interface 1740 to communicate with other devices or chips, and specifically, may output information or data to other devices or chips.

[0313] Optionally, the chip can be applied to the network device in the embodiments of the present application, and the chip can implement the corresponding processes implemented by the network device in each method of the embodiments of the present application. For the sake of brevity, they will not be repeated here.

[0314] Optionally, the chip can be applied to the mobile terminal / terminal device in the embodiments of the present application, and the chip can implement the corresponding processes implemented by the mobile terminal / terminal device in the various methods of the embodiments of the present application. For the sake of brevity, they will not be repeated here.

[0315] It should be understood that the chip mentioned in the embodiments of the present application can also be called a system-level chip, a system chip, a chip system or a system-on-chip chip, etc.

[0316] FIG20 is a schematic block diagram of a communication system 2000 provided in an embodiment of the present application. As shown in FIG20 , the communication system 2000 includes a terminal device 2010 and a network device 2020 .

[0317] Among them, the terminal device 2010 can be used to implement the corresponding functions implemented by the terminal device in the above method, and the network device 2020 can be used to implement the corresponding functions implemented by the network device in the above method. For the sake of brevity, they are not repeated here.

[0318] It should be understood that the processor of the embodiments of the present application may be an integrated circuit chip with signal processing capabilities. During implementation, each step of the above method embodiment can be completed by hardware integrated logic circuits in the processor or software instructions. The above processor can be a general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field programmable gate array (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, or discrete hardware components. The various methods, steps, and logic block diagrams disclosed in the embodiments of the present application can be implemented or executed. The general-purpose processor can be a microprocessor or any conventional processor. The steps of the method disclosed in the embodiments of the present application can be directly embodied as being executed by a hardware decoding processor, or can be executed by a combination of hardware and software modules in the decoding processor. The software module can be located in a storage medium mature in the art, such as random access memory, flash memory, read-only memory, programmable read-only memory, electrically erasable programmable memory, registers, etc. 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.

[0319] It is understood that the memory in the embodiments of the present application may be a volatile memory or a non-volatile memory, or may include both volatile and non-volatile memories. Among them, the non-volatile memory may be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), or a flash memory. The volatile memory may be a random access memory (RAM), which is used as an external cache. By way of example and not limitation, many forms of RAM are available, such as static random access memory (SRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (SDRAM), double data rate synchronous dynamic random access memory (DDR SDRAM), enhanced synchronous dynamic random access memory (ESDRAM), synchronous link dynamic random access memory (SLDRAM), and direct RAM bus random access memory (DR RAM). It should be noted that the memory of the systems and methods described herein is intended to include, but is not limited to, these and any other suitable types of memory.

[0320] It should be understood that the above-mentioned memories are exemplary but not restrictive. For example, the memories in the embodiments of the present application may also be static random access memory (SRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (SDRAM), double data rate synchronous dynamic random access memory (DDR SDRAM), enhanced synchronous dynamic random access memory (ESDRAM), synchronous link dynamic random access memory (SLDRAM), and direct RAM RAM (DR RAM), etc. In other words, the memories in the embodiments of the present application are intended to include, but are not limited to, these and any other suitable types of memories.

[0321] An embodiment of the present application also provides a computer-readable storage medium for storing a computer program.

[0322] Optionally, the computer-readable storage medium can be applied to the network device in the embodiments of the present application, and the computer program enables the computer to execute the corresponding processes implemented by the network device in the various methods of the embodiments of the present application. For the sake of brevity, they are not repeated here.

[0323] Optionally, the computer-readable storage medium can be applied to the mobile terminal / terminal device in the embodiments of the present application, and the computer program enables the computer to execute the corresponding processes implemented by the mobile terminal / terminal device in the various methods of the embodiments of the present application. For the sake of brevity, they will not be repeated here.

[0324] An embodiment of the present application also provides a computer program product, including computer program instructions.

[0325] Optionally, the computer program product can be applied to the network device in the embodiments of the present application, and the computer program instructions enable the computer to execute the corresponding processes implemented by the network device in the various methods of the embodiments of the present application. For the sake of brevity, they are not repeated here.

[0326] Optionally, the computer program product can be applied to the mobile terminal / terminal device in the embodiments of the present application, and the computer program instructions enable the computer to execute the corresponding processes implemented by the mobile terminal / terminal device in the various methods of the embodiments of the present application. For the sake of brevity, they will not be repeated here.

[0327] The embodiment of the present application also provides a computer program.

[0328] Optionally, the computer program can be applied to the network device in the embodiments of the present application. When the computer program runs on a computer, the computer executes the corresponding processes implemented by the network device in the various methods of the embodiments of the present application. For the sake of brevity, they are not described here.

[0329] Optionally, the computer program can be applied to the mobile terminal / terminal device in the embodiments of the present application. When the computer program runs on the computer, the computer executes the corresponding processes implemented by the mobile terminal / terminal device in the various methods of the embodiments of the present application. For the sake of brevity, they will not be repeated here.

[0330] Those skilled in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0331] Those skilled in the art will clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0332] In the several embodiments provided in this application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the device embodiments described above are merely schematic. For example, the division of the units is merely a logical function division. In actual implementation, there may be other division methods, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0333] The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple network units. Some or all of these units may be selected to achieve the purpose of this embodiment according to actual needs.

[0334] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0335] If the functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application, 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. The computer software product is stored in a storage medium and includes several instructions for enabling a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage medium includes various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk.

[0336] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present application should be included in the scope of protection of the present application. Therefore, the scope of protection of the present application should be based on the scope of protection of the claims.

Claims

1. A communication method, the method comprising: A terminal device receives a first signal sent by a network device and sends a second signal to the network device; the second signal is a backscattered signal of the first signal; wherein, the channel where the second signal is located satisfies a first constraint, and / or the time domain position where the second signal is located satisfies a second constraint.

2. The method according to claim 1, wherein, The first constraint includes: the channel where the second signal is located is a channel in a first partial channel; the first partial channel is a channel for uplink transmission among the channels deployed by the network.

3. The method according to claim 2, wherein, The method further comprises: The terminal device determines the first partial channel and / or the second partial channel and / or the third partial channel based on first information; The second partial channel is a channel for downlink transmission among the channels deployed by the network; the third partial channel is a channel for uplink and downlink guard intervals among the channels deployed by the network.

4. The method according to claim 3, wherein The first information is used to determine at least one of the following: The number of channels in the first partial channel; The starting channel position of the first partial channel; The number of channels in the second partial channel; The starting channel position of the second partial channel; The number of channels in the third partial channel.

5. The method according to claim 3 or 4, wherein, The first information includes at least one of the following parameters: A first parameter, the first parameter characterizing the number of channels deployed by the network; A second parameter, the second parameter characterizing the proportion factor corresponding to the first partial channel; A third parameter, the third parameter characterizing the number of channels in the first partial channel; A fourth parameter, the fourth parameter characterizing the proportion factor corresponding to the second partial channel; A fifth parameter, the fifth parameter characterizing the number of channels in the second partial channel; A sixth parameter, the sixth parameter characterizing the proportion factor corresponding to the third partial channel; A seventh parameter, the seventh parameter characterizing the number of channels in the third partial channel.

6. The method according to claim 5, wherein, The number of channels in the first partial channel is determined based on the first parameter and the second parameter; or, The number of channels in the first partial channel is determined based on the third parameter.

7. The method according to claim 5 or 6, wherein, The number of channels in the second partial channel is determined based on the first parameter and the fourth parameter; or, The number of channels in the second partial channel is determined based on the fifth parameter.

8. The method according to any one of claims 5 to 7, wherein, The number of channels in the third partial channel is determined based on the first parameter and the sixth parameter; or, The number of channels in the third partial channel is determined based on the seventh parameter.

9. The method according to any one of claims 3 to 8, wherein The first information includes first indication information and / or second indication information; The first indication information is used to indicate that the starting channel of the first partial channel is the channel with the lowest frequency among the channels deployed by the network, or the starting channel of the first partial channel is the channel with the highest frequency among the channels deployed by the network; The second indication information is used to indicate the channel index of the starting channel of the first partial channel and / or whether the first partial channel is a continuous channel starting from the channel index to the high-frequency direction or the low-frequency direction.

10. The method according to claim 9, wherein, The starting channel position of the first part of the channel is determined based on the first indication information and / or the second indication information.

11. The method according to any one of claims 3 to 10, wherein, The first information includes third indication information and / or fourth indication information; The third indication information is used to indicate that the starting channel of the second part of the channel is the channel with the highest frequency among the channels deployed by the network, or the starting channel of the second part of the channel is the channel with the lowest frequency among the channels deployed by the network; The fourth indication information is used to indicate the channel index of the starting channel of the second part of the channel and / or whether the first part of the channel is a continuous channel starting from the channel index to the high-frequency direction or the low-frequency direction.

12. The method according to claim 11, wherein, The starting channel position of the second part of the channel is determined based on the third indication information and / or the fourth indication information.

13. The method according to any one of claims 3 to 12, wherein, The third part of the channel is located between the first part of the channel and the second part of the channel.

14. The method according to any one of claims 3 to 13, wherein, At least part of the content in the first information is agreed upon by the protocol, and / or at least part of the content in the first information is determined based on the operating spectrum of the terminal device, and / or at least part of the content in the first information is configured by the downlink signal of the network device.

15. The method according to any one of claims 2 to 14, wherein, The method further includes: The terminal device selects a channel for transmitting the second signal in the first part of the channel.

16. The method according to claim 1, wherein, The first constraint includes: the channel where the second signal is located is a channel other than the fourth part of the channel among the channels deployed by the network, and / or the signal where the second signal is located is a channel in the fifth part of the channel among the channels deployed by the network.

17. The method according to claim 16, wherein, The fourth part of the channel is the channel used by the network device for the most recent one or more downlink transmissions after the first signal is sent.

18. The method according to claim 16, wherein, The fourth part of the channel is a channel that the terminal device is not allowed to use, and the fifth part of the channel is a channel that the terminal device is allowed to use.

19. The method according to any one of claims 16 to 18, wherein The first signal carries second information and / or third information, the second information is used to indicate the fourth part of the channel, and the third information is used to indicate the fifth part of the channel.

20. The method according to any one of claims 16 to 19, wherein, The method further includes: The terminal device selects a channel for transmitting the second signal in a channel other than the fourth part of the channel among the channels deployed by the network; and / or, The terminal device selects a channel for transmitting the second signal in the fifth part of the channel among the channels deployed by the network.

21. The method according to any one of claims 1 to 20, wherein The second constraint includes: the time domain position where the second signal is located does not overlap with the first time domain position, or the time domain position where the second signal is located does not fall within the first time window.

22. The method according to claim 21, wherein, The first time domain position is the time domain position used by the network device for the most recent one or more downlink transmissions after the first signal is sent.

23. The method according to claim 21 or 22, wherein The first signal carries fourth information, and the fourth information is used to indicate the first time domain position or the time interval between the first time domain position and the time domain position where the first signal is located.

24. According to the method according to any one of claims 21 to 23, wherein, The start time of the first time window is determined based on the first time domain position and the first duration; and / or, The end time of the first time window is determined based on the first time domain position and the second duration.

25. The method according to claim 24, wherein, The first signal carries fifth information, and the fifth information is used to indicate at least one of the following: the start time of the first time window, the end time of the first time window, and the duration of the first time window.

26. The method according to claim 24, wherein The first signal carries sixth information, and the sixth information is used to indicate at least one of the following: the first duration between the start time of the first time window and the first time domain position; the second duration between the end time of the first time window and the first time domain position.

27. The method according to any one of claims 21 to 26, wherein The method further includes: The terminal device selects the first time domain position or a time domain position outside the first time window as the time domain position for transmitting the second signal.

28. The method according to any one of claims 1 to 27, wherein The method further includes: If the time domain position selected by the terminal device for the second signal does not meet the second constraint, the terminal device selects a channel that meets the first constraint for the second signal; If the time domain position selected by the terminal device for the second signal meets the second constraint, the terminal device randomly selects a channel from the channels deployed in the network as the channel for transmitting the second signal.

29. The method according to any one of claims 1 to 27, wherein, The method further includes: If the channel selected by the terminal device for the second signal does not meet the first constraint, the terminal device selects a time domain position that meets the second constraint for the second signal; If the channel selected by the terminal device for the second signal meets the first constraint, the terminal device randomly selects a time domain position as the time domain position for transmitting the second signal.

30. A communication method, the method includes: The network device sends a first signal to the terminal device and receives the second signal sent by the terminal device; the second signal is the backscattered signal of the first signal; wherein, the channel where the second signal is located meets the first constraint, and / or the time domain position where the second signal is located meets the second constraint.

31. The method according to claim 30, wherein, The first constraint includes: the channel where the second signal is located is a channel in the first partial channels; the first partial channels are the channels for uplink transmission in the channels deployed in the network.

32. The method according to claim 31, wherein, The first partial channels and / or the second partial channels and / or the third partial channels are determined based on the first information; The second partial channels are the channels for downlink transmission in the channels deployed in the network; the third partial channels are the channels for the uplink and downlink guard intervals in the channels deployed in the network.

33. The method according to claim 32, wherein, The first information is used to determine at least one of the following: the number of channels in the first partial channels; the starting channel position of the first partial channels; the number of channels in the second partial channels; the starting channel position of the second partial channels; the number of channels in the third partial channels.

34. The method according to claim 32 or 33, wherein, The first information includes at least one of the following parameters: a first parameter, where the first parameter characterizes the number of channels deployed in the network; a second parameter, where the second parameter characterizes the proportion factor corresponding to the first partial channels; a third parameter, where the third parameter characterizes the number of channels in the first partial channels; a fourth parameter, where the fourth parameter characterizes the proportion factor corresponding to the second partial channels; a fifth parameter, where the fifth parameter characterizes the number of channels in the second partial channels; The sixth parameter, where the sixth parameter characterizes the occupancy factor corresponding to the third part of the channels; The seventh parameter, where the seventh parameter characterizes the number of channels in the third part of the channels.

35. The method according to claim 34, wherein, the number of channels in the first part of the channels is determined based on the first parameter and the second parameter; or, the number of channels in the first part of the channels is determined based on the third parameter.

36. The method according to claim 34 or 35, wherein, the number of channels in the second part of the channels is determined based on the first parameter and the fourth parameter; or, the number of channels in the second part of the channels is determined based on the fifth parameter.

37. The method according to any one of claims 34 to 36, wherein, the number of channels in the third part of the channels is determined based on the first parameter and the sixth parameter; or, the number of channels in the third part of the channels is determined based on the seventh parameter.

38. The method according to any one of claims 32 to 37, wherein The first information includes first indication information and / or second indication information; The first indication information is used to indicate that the starting channel of the first part of the channels is the channel with the lowest frequency among the channels deployed by the network, or the starting channel of the first part of the channels is the channel with the highest frequency among the channels deployed by the network; The second indication information is used to indicate the channel index of the starting channel of the first part of the channels and / or whether the first part of the channels is a continuous channel starting from the channel index to the high-frequency direction or the low-frequency direction.

39. The method according to claim 38, wherein, The starting channel position of the first part of the channels is determined based on the first indication information and / or the second indication information.

40. The method according to any one of claims 32 to 39, wherein The first information includes third indication information and / or fourth indication information; The third indication information is used to indicate that the starting channel of the second part of the channels is the channel with the highest frequency among the channels deployed by the network, or the starting channel of the second part of the channels is the channel with the lowest frequency among the channels deployed by the network; The fourth indication information is used to indicate the channel index of the starting channel of the second part of the channels and / or whether the first part of the channels is a continuous channel starting from the channel index to the high-frequency direction or the low-frequency direction.

41. The method according to claim 40, wherein, The starting channel position of the second part of the channels is determined based on the third indication information and / or the fourth indication information.

42. The method according to any one of claims 32 to 41, wherein, The third part of the channels is located between the first part of the channels and the second part of the channels.

43. The method according to any one of claims 32 to 42, wherein At least part of the content in the first information is agreed upon by the protocol, and / or at least part of the content in the first information is determined based on the operating spectrum of the terminal device, and / or at least part of the content in the first information is configured by the downlink signal of the network device.

44. The method according to claim 30, wherein, The first constraint includes: the channel where the second signal is located is a channel other than the fourth part of the channels among the channels deployed by the network, and / or the signal where the second signal is located is a channel in the fifth part of the channels among the channels deployed by the network.

45. The method according to claim 44, wherein, The fourth part of the channels is the channel used by the network device for the most recent one or more downlink transmissions after the first signal is sent.

46. The method according to claim 44, wherein, The fourth part of the channels is a channel that the terminal device is not allowed to use, and the fifth part of the channels is a channel that the terminal device is allowed to use.

47. The method according to any one of claims 44 to 46, wherein The first signal carries the second information and / or the third information, where the second information is used to indicate the fourth part of the channel, and the third information is used to indicate the fifth part of the channel.

48. The method according to any one of claims 30 to 47, wherein, The second constraint includes: the time domain position where the second signal is located does not overlap with the first time domain position, or the time domain position where the second signal is located does not fall within the first time window.

49. The method according to claim 48, wherein, The first time domain position is the time domain position adopted by the network device for the most recent one or more downlink transmissions after the first signal is sent.

50. The method according to claim 48 or 49, wherein, The first signal carries the fourth information, and the fourth information is used to indicate the first time domain position or the time interval between the first time domain position and the time domain position where the first signal is located.

51. The method according to any one of claims 48 to 50, wherein the start time of the first time window is determined based on the first time domain position and the first duration; and / or the end time of the first time window is determined based on the first time domain position and the second duration.

52. The method according to claim 51, wherein, The first signal carries the fifth information, and the fifth information is used to indicate at least one of the following: the start time of the first time window, the end time of the first time window, the duration of the first time window.

53. The method according to claim 51, wherein, The first signal carries the sixth information, and the sixth information is used to indicate at least one of the following: the first duration of the interval between the start time of the first time window and the first time domain position; the second duration of the interval between the end time of the first time window and the first time domain position.

54. A communication device, applied to a terminal device in a zero-power communication system, the device includes: a receiving unit, configured to receive a first signal sent by a network device; a sending unit, configured to send a second signal to the network device; the second signal is a backscattered signal of the first signal; wherein, the channel where the second signal is located satisfies the first constraint, and / or the time domain position where the second signal is located satisfies the second constraint.

55. A communication device, applied to a network device in a zero-power communication system, the device includes: a sending unit, configured to send a first signal to a terminal device; a receiving unit, configured to receive a second signal sent by the terminal device; the second signal is a backscattered signal of the first signal; wherein, the channel where the second signal is located satisfies the first constraint, and / or the time domain position where the second signal is located satisfies the second constraint.

56. A terminal device, comprising: 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 1 to 29.

57. A network device, comprising: 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 30 to 53.

58. A chip, comprising: a processor, configured to call and run a computer program from a memory, so that a device installed with the chip executes the method according to any one of claims 1 to 29, or the method according to any one of claims 30 to 53.

59. A computer-readable storage medium for storing a computer program, the computer program causing a computer to execute the method according to any one of claims 1 to 29 or the method according to any one of claims 30 to 53.

60. A computer program product comprising computer program instructions that cause a computer to execute the method according to any one of claims 1 to 29 or the method according to any one of claims 30 to 53.

61. A computer program, the computer program causing a computer to execute the method according to any one of claims 1 to 29 or the method according to any one of claims 30 to 53.

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