Method of wireless communication and communication device

Abstract

Provided are a method and a communication device for wireless communication. The method comprises: receiving, by a second device, first information transmitted by a first device in a backscatter manner through a first channel, the first channel being reserved for the first device by a network device. In embodiments of the present application, the network device reserves the first channel for the first device, so that the first device transmits the first information in the backscatter manner through the first channel, which helps to improve the possibility of backscatter transmission. On the other hand, in some scenarios, the first device may have a low capability and cannot support channel sensing, and therefore, the network device reserving the first channel for the first device helps to reduce the capability requirement of the first device, so as to expand the scenarios in which the wireless communication scheme is applicable.

Description

Wireless communication method and communication device Technical Field

[0001] The present application relates to the field of communication technology, and more specifically, to a wireless communication method and communication device. Background Art

[0002] In a communication system, a first device (e.g., an ambient power (AMP) device) can send information to a second device (e.g., a network device or auxiliary node) via backscatter. However, current communication protocols do not specify the channels used for backscatter, which may make backscatter-based communication impossible.

[0003] Summary of the Invention

[0004] The present application provides a wireless communication method and a communication device. The following introduces various aspects of the present application.

[0005] In a first aspect, a method for wireless communication is provided, including: a second device receives first information sent by a first device through a first channel, the first information is transmitted in a backscattering manner, and the first channel is reserved by a network device for the first device.

[0006] In a second aspect, a method for wireless communication is provided, including: a first device sends first information to a second device through a first channel, the first information is transmitted in a backscattering manner, and the first channel is reserved by a network device for the first device.

[0007] According to a third aspect, a communication device is provided, which is a second device and includes: a receiving unit for receiving first information sent by a first device through a first channel, wherein the first information is transmitted in a backscattering manner, and the first channel is reserved by a network device for the first device.

[0008] In a fourth aspect, a communication device is provided, which is a first device, and the communication device includes: a sending unit, used to send first information to a second device through a first channel, the first information is transmitted in a backscattering manner, and the first channel is reserved by a network device for the first device.

[0009] In a fifth aspect, a communication device is provided, comprising a processor, a memory, and a transceiver, wherein the memory is used to store one or more computer programs, and the processor is used to call the computer program in the memory so that the communication device executes part or all of the steps in the method of the first aspect.

[0010] In the sixth aspect, a communication device is provided, comprising a processor, a memory, and a transceiver, wherein the memory is used to store one or more computer programs, and the processor is used to call the computer program in the memory so that the communication device executes part or all of the steps in the method of the second aspect.

[0011] In a seventh aspect, an embodiment of the present application provides a communication system, which includes the above-mentioned communication device. In another possible design, the system may also include other devices that interact with the communication device in the solution provided in the embodiment of the present application.

[0012] In an eighth aspect, an embodiment of the present application provides a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program, and the computer program enables a communication device to execute part or all of the steps in the methods of the above aspects.

[0013] In a ninth aspect, embodiments of the present application provide a computer program product, wherein the computer program product includes a non-transitory computer-readable storage medium storing a computer program, wherein the computer program is operable to cause a communication device to perform some or all of the steps of the methods described in each of the above aspects. In some implementations, the computer program product may be a software installation package.

[0014] In the tenth aspect, an embodiment of the present application provides a chip, which includes a memory and a processor. The processor can call and run a computer program from the memory to implement some or all of the steps described in the methods of the above aspects.

[0015] In an embodiment of the present application, the network device may reserve a first channel for the first device so that the first device can transmit the first information via the first channel in a backscatter manner, thereby increasing the possibility of backscatter-based transmission. On the other hand, in some scenarios, the capabilities of the first device may be low and unable to support channel sensing. Therefore, reserving the first channel for the first device by the network device helps reduce the capability requirements of the first device, thereby expanding the scenarios applicable to the wireless communication solution. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] FIG1 is a wireless communication system 100 used in an embodiment of the present application.

[0017] FIG2 is a diagram showing an example structure of an ambient internet of things (A-IoT) device.

[0018] FIG3 is a structural diagram of an energy harvesting module in FIG2 .

[0019] FIG4 is a schematic diagram of the backscatter communication process of an A-IoT device.

[0020] FIG5 is an example diagram of the encoding method of an A-IoT device.

[0021] FIG6 is a diagram showing an example of the system architecture of an A-IoT communication system provided by one embodiment of the present application.

[0022] FIG7 is a diagram showing an example of the system architecture of an A-IoT communication system provided in another embodiment of the present application.

[0023] FIG8 is a diagram illustrating an example of the system architecture of a backscatter communication system provided in one embodiment of the present application.

[0024] FIG9 is a diagram showing an example of the system architecture of a backscatter communication system provided in another embodiment of the present application.

[0025] FIG10 is a schematic flowchart of a wireless communication method provided in an embodiment of the present application.

[0026] 11-14 are example diagrams of multiple channels reserved by a network device according to an embodiment of the present application.

[0027] 15A-15C illustrate how a first channel and / or a second channel are selected from a plurality of channels using a first parameter and / or a second parameter, as provided in an embodiment of the present application.

[0028] 16A-16B are example diagrams of second information transmission provided in an embodiment of the present application.

[0029] 17A-17C are example diagrams of the first condition provided in an embodiment of the present application.

[0030] Figures 18A and 18C are example diagrams of network device channel monitoring provided in embodiments of the present application.

[0031] Figure 19 is a structural diagram of the communication device provided in an embodiment of the present application.

[0032] FIG20 is a schematic structural diagram of a communication device provided in another embodiment of the present application.

[0033] FIG21 is a schematic diagram of a device according to an embodiment of the present application. DETAILED DESCRIPTION

[0034] The technical solution in this application will be described below with reference to the accompanying drawings.

[0035] Communication system architecture

[0036] Figure 1 illustrates a wireless communication system 100 used in an embodiment of the present application. The wireless communication system 100 may include a network device 110 and a terminal device 120. The network device 110 may be a device that communicates with the terminal device 120. The network device 110 may provide communication coverage for a specific geographic area and may communicate with the terminal device 120 within the coverage area.

[0037] FIG1 exemplarily shows a network device and two terminals. Optionally, the wireless communication system 100 may include multiple network devices and each network device may include other numbers of terminal devices within its coverage area, which is not limited in the embodiments of the present application.

[0038] Optionally, the wireless communication system 100 may further include other network entities such as a network controller and a mobility management entity, which is not limited in the embodiment of the present application.

[0039] It should be understood that the technical solutions of the embodiments of the present application can be applied to various communication systems, such as: fifth generation (5G) system or new radio (NR), long term evolution (LTE) system, LTE frequency division duplex (FDD) system, LTE time division duplex (TDD), etc. The technical solutions provided in this application can also be applied to future communication systems, such as the sixth generation mobile communication system, satellite communication system, etc.

[0040] The terminal device in the embodiments of the present application may also be referred to as user equipment (UE), access terminal, user unit, user station, mobile station, mobile station (MS), mobile terminal (MT), remote station, remote terminal, mobile device, user terminal, terminal, wireless communication device, user agent or user device. The terminal device in the embodiments of the present application may refer to a device that provides voice and / or data connectivity to a user and can be used to connect people, objects and machines, such as a handheld device with wireless connection function, a vehicle-mounted device, etc. The terminal device in the embodiments of the present application can be a mobile phone, a tablet computer, a laptop computer, a PDA, a mobile internet device (MID), a wearable device, a virtual reality (VR) device, an augmented reality (AR) device, a wireless terminal in industrial control, a wireless terminal in self-driving, a wireless terminal in remote medical surgery, a wireless terminal in a smart grid, a wireless terminal in transportation safety, a wireless terminal in a smart city, a wireless terminal in a smart home, etc. Optionally, the UE can be used to act as a base station. For example, the UE can act as a scheduling entity that provides sidelink signals between UEs in V2X or D2D, etc. For example, a cellular phone and a car communicate with each other using sidelink signals. The cellular phone and smart home devices communicate without relaying the communication signal through the base station.

[0041] The network device in the embodiments of the present application may be a device for communicating with a terminal device, and may also be referred to as an access network device or a radio access network device. For example, the network device may be a base station. The network device in the embodiments of the present application may refer to a radio access network (RAN) node (or device) that connects a terminal device to a wireless network. A base station can broadly cover various names as follows, or be replaced with the following names, such as: NodeB, evolved NodeB (eNB), next generation NodeB (gNB), relay station, access point, transmission point (TRP), transmission point (TP), master station MeNB, secondary station SeNB, multi-standard radio (MSR) node, home base station, network controller, access node, wireless node, access point (AP), transmission node, transceiver node, baseband unit (BBU), remote radio unit (RRU), active antenna unit (AAU), remote radio head (RRH), central unit (CU), distributed unit (DU), positioning node, etc. A base station can be a macro base station, a micro base station, a relay node, a donor node or the like, or a combination thereof. A base station can also refer to a communication module, modem or chip used to be set in the aforementioned device or apparatus. The base station can also be a mobile switching center and a device that performs base station functions in device-to-device D2D, vehicle-to-everything (V2X), and machine-to-machine (M2M) communications, a network-side device in a 6G network, or a device that performs base station functions in future communication systems. The base station can support networks with the same or different access technologies. The embodiments of this application do not limit the specific technology and specific device form used by the network equipment.

[0042] Base stations can be fixed or mobile. For example, a helicopter or drone can be configured to act as a mobile base station, and one or more cells can move based on the location of the mobile base station. In other examples, a helicopter or drone can be configured to act as a device that communicates with another base station.

[0043] In some deployments, the network device in the embodiments of the present application may refer to a CU or a DU, or the network device may include a CU and a DU. The gNB may also include an AAU.

[0044] The network equipment and terminal devices can be deployed on land, including indoors or outdoors, handheld or vehicle-mounted; they can also be deployed on water; they can also be deployed in the air on aircraft, balloons, and satellites. The embodiments of this application do not limit the scenarios in which the network equipment and terminal devices are located.

[0045] It should be understood that all or part of the functions of the communication device in this application can also be implemented through software functions running on hardware, or through virtualization functions instantiated on a platform (such as a cloud platform).

[0046] Environmental Internet of Things (A-IoT)

[0047] A-IoT communication uses energy harvesting and backscatter communication technology. The so-called A-IoT device refers to an Internet of Things (IoT) device that uses various environmental energies, such as wireless radio frequency energy, light energy, solar energy, thermal energy, mechanical energy, and other environmental energies to drive itself. This type of IoT device may have no energy storage capacity or may have a very limited energy storage capacity (such as using a capacitor with a capacity of tens of microfarads (uF)). Compared with existing IoT devices, IoT devices have many advantages such as no conventional battery, no maintenance, small size, low complexity, low cost, and long life cycle. In this scenario, the terminal device 120 mentioned above can be called a "zero-power device" or "A-IoT device". The following is an exemplary introduction to the working principle of the A-IoT device in conjunction with Figures 2 to 8.

[0048] As shown in Figure 2 , the AIoT may include a network device 210 and an A-IoT device 220. Network device 210 may be, for example, network device 110 in Figure 1 . A-IoT device 220 may be, for example, terminal device 120 in Figure 1 . Network device 210 is configured to send wireless power signals to A-IoT device 220 and receive backscattered signals from A-IoT device 220.

[0049] In some embodiments, the A-IoT device 220 may include an energy harvesting module 221 and a backscatter communication module 222. In some cases, the A-IoT device 220 may also include a low-power computing module 223. The low-power computing module 223 may be used to provide computing functions for the A-IoT device 220, such as data processing. In other cases, the A-IoT device 220 may also include a sensor module 224 for collecting external information (e.g., ambient temperature, ambient humidity, etc.). In other cases, the A-IoT device 220 may also include a storage module for storing some information (e.g., external information collected by the above-mentioned sensors, or item identification, etc.).

[0050] The energy harvesting module 221 is used to harvest energy. In some implementations, energy can be harvested via a power supply signal sent by another device or from the external environment. The power supply signal can be a radio frequency signal sent by the network device 210. Therefore, the energy harvesting module can be a radio frequency (RF) power harvesting module.

[0051] FIG3 shows a possible structure of the energy harvesting module 221. As shown in FIG3, the energy harvesting module 221 can harvest the energy of the spatial electromagnetic waves of the radio frequency signal based on the principle of electromagnetic induction, and store the harvested energy in the capacitor C, which is the process of charging the capacitor C. When the charging process of the capacitor C is completed, the capacitor C can begin to discharge to provide energy for the A-IoT device 220. For example, the discharge of the capacitor C can be used to drive the A-IoT device 220 to perform low-power demodulation of data sent by other devices. For another example, the discharge of the capacitor C can be used to drive the A-IoT device 220 to modulate the data to be sent. For another example, the discharge of the capacitor C can be used to drive the sensor of the A-IoT device 220 to collect data. For another example, the discharge of the capacitor C can be used to drive the A-IoT device 220 to read data from the memory 215, etc. Therefore, the A-IoT device does not require a traditional battery.

[0052] The following describes the backscattering communication principle in conjunction with Figure 4. Referring to Figure 4, the A-IoT device 220 receives a wireless signal sent by another device (such as the network device 210) and modulates the wireless signal to load the data to be sent. Then, the A-IoT device 220 radiates the modulated signal from the antenna. This information transmission process is called backscattering communication. The above-mentioned wireless signal can also be called a carrier signal. A carrier signal can refer to an unmodulated wireless signal. The carrier signal can be, for example, a sine wave signal. Among them, backscattering communication and load modulation functions are inseparable. The load modulation function can be understood as adjusting and controlling the circuit parameters of the oscillation circuit of the A-IoT device according to the beat of the data stream, so that parameters such as the impedance of the A-IoT device change accordingly, thereby completing the modulation process.

[0053] In some implementations, the A-IoT device 220 may also be provided with a logic processing unit to perform corresponding computing functions.

[0054] Generally, the load modulation function can be implemented through two methods: resistive load modulation and capacitive load modulation. Figure 5 shows a circuit diagram of an A-IoT device based on resistive load modulation technology. In resistive load modulation, a resistor RL can be connected in parallel to the load. The switch S can be controlled based on the binary data stream to realize the connection or disconnection of the resistor RL. In this way, the connection and disconnection of the resistor RL will cause the circuit voltage to change, and the change in the circuit voltage can control the amplitude of the backscattered signal of the A-IoT device, thereby realizing the modulation of the backscattered signal, that is, performing amplitude-shift keying (ASK) modulation on the backscattered signal.

[0055] Similarly, in capacitive load modulation, the on / off switching of the capacitor can be controlled based on a binary data stream to change the circuit resonant frequency, thereby changing the operating frequency of the backscattered signal to implement frequency-shift keying (FSK) modulation.

[0056] It can be seen that A-IoT devices use load modulation to modulate the incoming signal, thereby realizing the backscatter communication process. Therefore, A-IoT devices have significant advantages: (1) A-IoT devices do not actively transmit signals, so they do not require complex RF links such as power amplifiers and RF filters; (2) A-IoT devices do not need to actively generate high-frequency signals, so they do not need high-frequency crystal oscillators; (3) With the help of backscatter communication, the signal transmission of A-IoT devices does not consume the terminal's own energy.

[0057] In some implementations, A-IoT devices can be battery-free, but batteries can also be configured. Based on the energy source and how it's used, A-IoT devices can be categorized as passive, semi-passive, and active.

[0058] Passive A-IoT devices do not require internal batteries. When they approach a network device (such as a radio frequency identification (RFID) reader), they are within the near-field radiation generated by the network device's antenna. Consequently, the A-IoT device's antenna generates an induced current through electromagnetic induction, which drives the A-IoT device's low-power chip circuitry. This performs tasks such as demodulating the forward link signal (downlink, from the network device to the A-IoT device) and modulating the reverse link signal (uplink, from the A-IoT device to the network device). For the backscatter link, the A-IoT device uses backscattering to transmit signals. Consequently, passive A-IoT devices require no internal battery for either the forward or reverse link, making them truly zero-power end devices. Passive A-IoT devices do not require batteries, and their RF and baseband circuitry are very simple. For example, they do not require components such as low-noise amplifiers, power amplifiers, crystal oscillators, and analog-to-digital converters. Consequently, they offer numerous advantages, including small size, light weight, low cost, and long life.

[0059] Semi-passive A-IoT devices do not have conventional batteries themselves. Instead, they use RF energy harvesting modules to harvest radio wave energy, or solar, light, thermal, or kinetic energy harvesting modules to harvest energy. This harvested energy is then stored in an energy storage unit (such as a capacitor). This energy storage unit then drives the A-IoT device's low-power chip circuitry, performing tasks such as demodulating forward link signals and modulating reverse link signals. For backscatter links, A-IoT devices use backscattering to transmit signals. As can be seen, semi-passive A-IoT devices do not require internal batteries for either the forward or reverse link. While they utilize energy stored in capacitors, this energy is derived from radio energy harvested by the energy harvesting module, making them truly zero-power end devices. Semi-passive A-IoT devices inherit many of the advantages of passive A-IoT devices, offering advantages such as small size, light weight, low price, and long service life.

[0060] Active A-IoT devices can have built-in batteries (conventional batteries, such as dry cells or rechargeable lithium batteries). These batteries power the A-IoT device's low-power chip circuitry, performing tasks such as forward link signal demodulation and reverse link signal modulation. However, for the backscatter link, the A-IoT device uses backscattering to transmit signals. Therefore, the zero-power nature of active A-IoT devices stems primarily from the fact that reverse link signal transmission does not require the device's own power, but instead utilizes backscattering. Although active A-IoT devices utilize batteries, their ultra-low power communication technology results in very low power consumption, significantly extending battery life compared to existing technologies. The built-in battery in active A-IoT devices powers the RFID chip, increasing the tag's read and write range and improving communication reliability. Therefore, active A-IoT devices are suitable for scenarios with relatively high requirements for communication range and read latency.

[0061] It should be understood that the services of the Ambient IoT, like other IoT services, are primarily uplink services. In some implementations, A-IoT devices can be further categorized based on transmitter type: backscatter-based A-IoT devices, active transmitter-based A-IoT devices, and A-IoT devices with both backscatter and active transmitters.

[0062] Backscatter-based A-IoT devices use the backscatter method described above to transmit uplink data. These devices lack active transmitters, only backscatter transmitters. Therefore, when these devices transmit data, they require network equipment to provide a carrier, which they then use to perform backscattering to achieve data transmission.

[0063] Active transmitter-based A-IoT devices can use active transmitters with active transmission capabilities for uplink data transmission. Therefore, when sending data, such A-IoT devices can use their own active transmitters to send data without the need for network equipment to provide a carrier. Active transmitters suitable for A-IoT devices can include ultra-low power ASK transmitters and ultra-low power FSK transmitters. Based on current implementation examples, such transmitters can reduce overall power consumption to 400-600uW when transmitting a 100uW signal.

[0064] A-IoT devices with both backscatter and active transmitters can support both. The terminal can determine which uplink signal transmission method to use: backscatter or active transmission using an active transmitter, based on various conditions (such as battery life and available ambient energy) or based on network device scheduling.

[0065] Low-power IoT based on cellular networks

[0066] The cellular Internet of Things (IoT) is booming. The 3rd Generation Partnership Project (3GPP) has standardized IoT technologies such as narrowband IoT (NB-IoT), machine-type communications (MTC), and reduced capability (RedCaP). However, many IoT communication requirements remain unmet using existing technologies, including harsh communication environments (high and low temperatures, high humidity, high voltage, high radiation, or high-speed motion), the need for extremely small terminal form factors, and extremely low costs. Therefore, to address these unmet IoT communication needs, cellular networks also need to develop ultra-low-cost, extremely small, and battery- and maintenance-free IoT solutions. Environmental IoT precisely addresses this need.

[0067] Based on the discussion of A-IoT application scenarios in 3GPP system architecture (SA)1, A-IoT can be used in at least the following four scenarios: (1) Object recognition, such as logistics, production line product management, and supply chain management. (2) Environmental monitoring, such as temperature, humidity, and harmful gas monitoring in the working environment and natural environment. (3) Positioning, such as indoor positioning, intelligent object search, and production line item positioning. (4) Intelligent control, such as intelligent control of various electrical appliances in smart homes (turning on and off air conditioners, adjusting temperatures), and intelligent control of various facilities in agricultural greenhouses (automatic irrigation and fertilization).

[0068] In a low-power Internet of Things based on a cellular network, as shown in FIG6 , the A-IoT device 220 can directly receive and send carrier signals from the network device 210, and send or backscatter corresponding data or signals to the network device 210. In other implementations, as shown in FIG7 , communication between the A-IoT device 220 and the network device 210 can also be achieved through an auxiliary node 230 (such as a relay node). In this case, the auxiliary node 230 sends a carrier signal to the A-IoT device 220, and the A-IoT device 220 sends or backscatters corresponding data or signals to the auxiliary node 230. The auxiliary node can be a terminal device, a base station device, or an integrated access and backhaul (IAB) node. In an embodiment of the present application, the network device and the auxiliary node can be used as an example of a second device.

[0069] In some implementations, the A-IoT device based on backscattering mentioned above is referred to as an "ambient power (AMP) device". In the embodiments of the present application, the AMP device can be used as an example of the first device. Due to its ultra-low cost and maintenance-free characteristics, AMP devices have a considerable market in many scenarios such as smart homes, smart manufacturing, logistics / warehousing, etc. Relevant organizations include IoT device suppliers, companies operating large shopping malls, or warehouse / logistics companies and smart home service providers. However, one of the main challenges of AMP devices is that the received signal after backscattering is very weak, especially compared with the interfering transmit (Tx) signal in a single-site backscattering scenario.

[0070] As shown in Figure 8 , a backscatter system in a monostatic scenario may include an AP 210 and an AMP device 220. AP 210 may be an example of network device 210 in Figure 6 . AP 210 is configured to send wireless Tx signals to AMP device 220 and receive backscatter signals from AMP device 220. The actual received signal at the AP is a superposition of the useful backscatter signal and the leaked self-interference signal. The strength of the self-interference signal may be much greater than the strength of the reflected backscatter signal. Due to the limited interference cancellation capability and dynamic range of the AP, in this scenario, the signal strength difference between the backscatter signal and the Tx signal is large.

[0071] The same situation can also occur during backscattering in a bistatic scenario. As shown in Figure 9, the bistatic backscatter system includes AP 210, AMP device 220, and a receiver, which is an example of auxiliary node 230 in Figure 7. AP 210 is used to send wireless Tx signals to AMP device 220, and the receiver receives the backscattered signals from AMP device 220.

[0072] Due to the limitations mentioned above, the coverage of backscatter-based AMP devices is very limited, especially in single-site backscatter scenarios.

[0073] Channel access scheme based on frequency shift backscattering

[0074] Based on the above introduction, it can be seen that whether in a single-site scenario or a dual-site scenario, the backscattered signal may be interfered with by the signal sent by the AP. Therefore, the related technology proposes a channel access solution called frequency shifting backscattering. That is, the AMP device can shift the backscattered signal to a channel different from the channel where the Tx signal is located to reduce the interference of the Tx signal on the backscattered signal.

[0075] Related protocols (e.g., IEEE 802.11Tutorial) have proposed a multiple access solution, that is, channel access in a communication system (e.g., wireless fidelity (WiFi)) can be based on the listen before talk (LBT) technology. However, for AMP devices, channel access based on LBT may consume too much power and deplete energy storage. For AMP devices without energy storage, this problem may be more significant. Therefore, related protocols (e.g., IEEE 802.11-23 / 0827) have proposed that the AP can perform LBT through transmission opportunity (TXOP) operations and other methods to reserve channels for AMP devices. However, this process is only applicable to the case where the AP reserves one channel for one AMP device.

[0076] Currently, in a communication system, a first device (e.g., the AMP device described above) can send information to a second device (e.g., the network device or auxiliary node described above) via backscatter. However, current communication protocols do not specify the channel used for backscattering, which may make it impossible to communicate based on backscattering. For example, if the first device is an AMP device and the second device is an AP, the AP sends a Tx signal to the AMP device, and the AMP device sends a signal via backscattering based on the transmitted Tx signal. However, current communication protocols do not specify the channel used for backscattering, which may make it impossible to communicate based on backscattering.

[0077] To address the above issues, an embodiment of the present application proposes a method for wireless communication, in which a network device may reserve a first channel for a first device so that the first device can transmit first information via the first channel in a backscattered manner, thereby increasing the possibility of backscatter-based transmission. On the other hand, in some scenarios, the capabilities of the first device may be low and unable to support channel sensing. Therefore, reserving the first channel for the first device by the network device helps to reduce the capability requirements of the first device, thereby expanding the scenarios in which the wireless communication solution is applicable.

[0078] The following describes a wireless communication method according to an embodiment of the present application in conjunction with Figure 10. Figure 10 is a schematic flow chart of the wireless communication method according to an embodiment of the present application. The method shown in Figure 10 includes step S1010.

[0079] In step S1010 , a first device sends first information to a second device through a first channel.

[0080] In some implementations, the first information is transmitted in a backscattered manner, and therefore, the first information can also be referred to as a “backscattered signal”.

[0081] In some implementations, the first channel is reserved by the network device for the first device. For example, the network device may reserve the first channel for the first device based on LBT.

[0082] In some implementations, the first channel is used to transmit the first information. Therefore, the first information can be understood as a channel for backscattering. Accordingly, the network device reserves the first channel for the first device, which can be understood as the network device reserves the channel for backscattering for the first device.

[0083] In some implementations, the second device sends the second information to the first device via the second channel. In some implementations, the second information may serve as an input signal for backscattering, or in other words, the second information is used by the first device to send the first information in a backscattering manner.

[0084] In some implementations, the second channel is different from the first channel. That is, the first device can use the frequency-shifted backscattering described above to transmit the first information, which helps reduce interference with the first information from other signals.

[0085] In some implementations, the second channel is a channel reserved by the network device for the first device. For example, the second channel is a channel reserved by the network device for sending a backscattered input signal to the first device.

[0086] In the embodiments of the present application, the positions of the first and second channels in the frequency domain are not limited. In some implementations, the first and second channels may be two continuous channels in the frequency domain. In other implementations, the first and second channels may be two discontinuous channels in the frequency domain, or in other words, the first and second channels may be two discrete channels in the frequency domain. The frequency domain positions of the first and second channels are described below with reference to FIG12.

[0087] In some implementations, the first channel and the second channel may be two of a plurality of channels reserved by the network device for the first device. Of course, in the embodiment of the present application, the network device may also reserve only two channels for the first device.

[0088] In the embodiments of the present application, there is no limitation on the distribution manner of the multiple channels in the frequency domain. In some implementations, all channels of the multiple channels are continuous in the frequency domain. This is described below in conjunction with FIG11. In other implementations, some or all channels in the multiple channels are discontinuous in the frequency domain. Taking the example of some channels in the multiple channels being discontinuous in the frequency domain, it can be understood that at least two channels in the multiple channels are discontinuous in the frequency domain. This is described below in conjunction with FIG13. Taking the example of all channels in the multiple channels being discontinuous in the frequency domain, it can be understood that any two channels in the multiple channels are discontinuous in the frequency domain. This is described below in conjunction with FIG14.

[0089] For ease of understanding, the following describes the arrangement of multiple channels in the frequency domain in accordance with an embodiment of the present application in conjunction with Figures 11 to 14. Figure 11 illustrates the arrangement of multiple channels in the frequency domain as an example, Figure 12 illustrates the arrangement of multiple channels including two channels as an example, Figure 13 illustrates the arrangement of multiple channels in the frequency domain as an example, and Figure 14 illustrates the arrangement of multiple channels in the frequency domain as an example.

[0090] 11 , assuming that the first device is an AMP device and the second device is an AP, the AP reserves four channels for the AMP device. The four channels include channel 1, channel 2, channel 3, and channel 4, and all four channels are continuous in the frequency domain.

[0091] Assume, in Figure 12, that the first device is an AMP and the second device is an AP. The AP reserves two channels for the AMP. These two channels are channel 0 and channel 1, which are contiguous in the frequency domain. The AP can select channel 0 as the second channel and channel 1 as the first channel. This means that when the AP transmits a signal via channel 0, the AMP sends a backscattered signal via channel 1 based on the signal received via channel 0. Conversely, for example, when the AP transmits a signal via channel 1, the AMP sends a backscattered signal via channel 0 based on the signal received via channel 1.

[0092] Continuing with Figure 12, assume that the first device is an AMP and the second device is an AP. The AP reserves two channels for the AMP. These two channels include channel 0 and channel 2, which are discrete in the frequency domain. The AP can select channel 0 as the second channel and channel 2 as the first channel. That is, the AP transmits a signal via channel 0, and accordingly, the AMP transmits a backscattered signal via channel 2 based on the signal received on channel 0. Vice versa, for example, when the AP transmits a signal via channel 2, the AMP transmits a backscattered signal via channel 0 based on the signal received on channel 2.

[0093] Assume, in Figure 13, that the first device is an AMP and the second device is an AP. The AP has reserved five channels for the AMP. These five channels include channel 1, channel 4, channel 5, channel 6, and channel 7. Channels 4 through 7 are contiguous in the frequency domain. The AP can select two of the five reserved channels as the first and second channels. For example, if the AP transmits a signal through channel 4, the AMP will then transmit a backscattered signal through channel 6 based on the signal received through channel 4.

[0094] Assume, in Figure 14, that the first device is an AMP and the second device is an AP. The AP has reserved three channels for the AMP. These three channels include channel 1, channel 4, and channel 7, all of which are discrete in the frequency domain. The AP can select two of the three reserved channels as the first and second channels. For example, if the AP transmits a signal through channel 1, the AMP will then transmit a backscattered signal through channel 4 based on the signal received through channel 1.

[0095] In some implementations, the frequency domain range corresponding to the multiple channels reserved by the network device is associated with one or more of the following capabilities: capabilities of the network device; and frequency shift capabilities supported by the first device.

[0096] In some implementations, the frequency domain range corresponding to the multiple channels may be determined based on the channel with the smallest corresponding frequency and the channel with the largest corresponding frequency among the multiple channels. For example, the frequency domain range corresponding to the multiple channels may be determined based on the frequency domain range between the channel with the smallest corresponding frequency and the channel with the largest corresponding frequency among the multiple channels.

[0097] In some implementations, the frequency shift capability supported by the first device may be used to indicate a frequency range corresponding to the frequency shift supported by the first device. That is, the frequency shift capability is used to indicate a frequency domain range within which the first device performs frequency shift.

[0098] In some scenarios, the channel sensing capability of the network device is greater than the frequency shift capability of the first device. That is to say, the frequency domain range corresponding to the multiple channels reserved by the network device may be greater than the frequency range corresponding to the frequency shift capability of the first device. At this time, due to the limitation of the frequency shift capability of the first device, some of the multiple channels cannot be used by the first device. Therefore, in an embodiment of the present application, selecting the first channel based on the frequency shift capability supported by the first device helps to improve the rationality of the network device reserving multiple channels. In addition, it can reduce the power consumption required for the network device to reserve channels.

[0099] In some implementations, the frequency shift capability can be used to indicate the maximum frequency range corresponding to the frequency shift of the first device (also known as the "maximum frequency shift (maximum frequency shift)"), or the frequency shift capability can be used to indicate the number of channels corresponding to the maximum frequency range corresponding to the frequency shift of the first device.

[0100] Assume that the number of channels corresponding to the maximum frequency shift of the first device is Q, and the indexes of multiple channels increase in order from low to high according to the frequencies corresponding to the channels. The maximum index among the indexes corresponding to the multiple channels is m, and the minimum index is n. At this time, the frequency range corresponding to the multiple channels is the frequency domain range from channel n to channel m, expressed as |mn|. Accordingly, the number of channels Q corresponding to the maximum frequency shift satisfies Q≥|mn|, where Q is a positive integer greater than or equal to 0.

[0101] In some implementations, the frequency shift capability supported by the first device may be reported by the first device to the second device, so that the second device can determine the frequency domain ranges corresponding to the multiple channels based on the frequency shift capability supported by the first device. For example, the first device may report the frequency shift capability supported by the first device to the second device during the initial authentication or association phase.

[0102] In some implementations, the capabilities of a network device are associated with channel sensing. For example, the capabilities of a network device are used to indicate the maximum number of channels supported by the network device for channel sensing. For example, the capabilities of a network device may indicate that the maximum number of channels supported by the network device for channel sensing is P. Accordingly, the number of channels reserved by the network device may be less than or equal to P, where P is a positive integer greater than or equal to 0.

[0103] For another example, the capability of the network device is used to indicate whether the network device supports channel sensing for discrete channels in the frequency domain, or in other words, the capability of the network device is used to indicate whether the network device supports channel sensing for discontinuous channels in the frequency domain.

[0104] For ease of understanding, the following explanation is given using channel sensing based on P and Q as an example. Assume that the network device does not support channel sensing for discrete channels in the frequency domain, the number of channels corresponding to the maximum frequency shift of the first device is Q, and the maximum number of channels supported by the network device for channel sensing is P. In some scenarios, Q may not be equal to P. At this time, if Q≤P, the network device can sense Q channels instead of P channels, and then reserve multiple channels from them. At this time, the frequency domain range of the multiple channels reserved by the network device is at most the frequency domain range corresponding to the Q channels. If Q>P, the network device can sense up to P channels. At this time, the frequency domain range of the multiple channels reserved by the network device is at most the frequency domain range corresponding to the P channels.

[0105] Assuming that the network device supports channel sensing for discrete channels in the frequency domain, the number of channels corresponding to the maximum frequency shift of the first device is Q, and the maximum channel distance between multiple discrete channels in the frequency domain reserved by the network device is Q.

[0106] In some implementations, the first channel can be associated with a first parameter, where the first parameter is used to select the first channel from the plurality of channels.

[0107] In the embodiments of the present application, the association between the first channel and the first parameter is not limited. In some implementations, the first channel corresponds to the first parameter. For example, the multiple channels include two adjacent channels: channel n and channel n+1. The first parameter may be the index of channel n. Accordingly, channel n corresponds to the first channel. This is described below with reference to FIG15A.

[0108] In some other implementations, the first channel can be determined based on a first parameter. For example, the multiple channels include K consecutive channels: channel n, channel n+1, ..., channel n+K. The first parameter is the number of channels between the starting channel of the multiple channels and the first channel. For example, the number of channels between the starting channel and the first channel can be m, where m is a positive integer. Based on m, the first channel can be determined to be channel n+m (0<=m<=K), which is described below in conjunction with Figure 15B. For another example, the multiple channels include K channels that are discontinuous in the frequency domain, and the first parameter indicates that the first channel is the channel with the smallest index among the multiple channels. Assuming that the starting channel of the multiple channels is channel n, the first channel can be determined to be channel n based on the first parameter, which is described below in conjunction with Figure 15c.

[0109] In some implementations, the second channel can be associated with a second parameter, where the second parameter is used to select the second channel from the plurality of channels.

[0110] In the embodiments of the present application, the association between the second channel and the second parameter is not limited. In some implementations, the second channel corresponds to the second parameter. For example, the multiple channels include two adjacent channels: channel n and channel n+1. The second parameter can be the index of channel n+1 (or channel n). Accordingly, channel n+1 corresponds to the second channel. This is described below in conjunction with FIG15A.

[0111] In some other implementations, the second channel can be determined based on a second parameter. For example, the multiple channels include K consecutive channels: channel n, channel n+1, ..., channel n+K. The second parameter is the number of channels between the starting channel and the second channel of the multiple channels, such as the number of channels between the starting channel and the second channel can be l, where l is a positive integer. Based on l, the second channel can be determined to be channel n+l (0<=l<=K, and l≠m, m is the first parameter), which is described below in conjunction with Figure 15B. For another example, the multiple channels include K channels that are discontinuous in the frequency domain, and the second parameter indicates that the second channel is the channel with the second smallest index among the multiple channels. Assuming that the channel with the second smallest index among the multiple channels is channel n+2, the second channel can be determined to be channel n+2 based on the second parameter, which is described below in conjunction with Figure 15C.

[0112] For ease of understanding, the following describes, in conjunction with Figures 15A-15C , a scheme for selecting a first channel and a second channel from multiple channels using a first parameter and a second parameter in an embodiment of the present application. Figure 15A describes the scheme using the first and second parameters corresponding to the first and second channels as an example, while Figures 15B-15C describe the scheme using the first and second parameters as an example for determining the first and second channels.

[0113] Referring to Figure 15A , assume that the first device is an AMP and the second device is an AP. The AP reserves two channels for the AMP. The two channels are channel 0 and channel 1. The first parameter is the index of channel 1, and the second parameter is the index of channel 0. Accordingly, it can be determined that the first channel is channel 1 and the second channel is channel 0.

[0114] Assume, in Figure 15B , that the first device is an AMP and the second device is an AP. The AP reserves four channels for the AMP. These four channels include channel 0, channel 1, channel 2, and channel 3, and are contiguous in the frequency domain. The first parameter is 3, and the second parameter is 0. Based on these first and second parameters, it can be determined that the first channel is channel 3 and the second channel is channel 0.

[0115] Referring to Figure 15C , assume that the first device is an AMP and the second device is an AP. The AP has reserved three channels for the AMP. These three channels include channel 1, channel 3, and channel 4, and are discontinuous in the frequency domain. A first parameter indicates that the first channel is the channel with the smallest index among the multiple channels, and a second parameter indicates that the second channel is the channel with the second smallest index among the multiple channels. Based on the first and second parameters, the first channel can be determined to be channel 1 and the second channel to be channel 3, respectively.

[0116] In some implementations, the first parameter and the second parameter may be determined by one or more of the following information: pre-configuration information; pre-defined information; and configuration information sent by the network device.

[0117] In some implementations, the first parameter and the second parameter may be determined by preconfiguration information. For example, the first parameter is configured using m, and the second parameter is configured using l, and the network device, the first device, and the second device are preconfigured with l and m when they leave the factory.

[0118] In some implementations, the first parameter and the second parameter may be determined by predefined information. For example, the predefined information may indicate that the first parameter is m and the second parameter is l.

[0119] In some implementations, one of the first parameter and the second parameter can be determined using predefined or preconfigured information, while the other can be determined using network device configuration information, which helps reduce network device configuration overhead. For example, the first parameter is configured using m, and the second parameter is configured using l. The first parameter m is preconfigured or predefined information, and the network device configures m for the first device before step S1010. For another example, the preconfigured or predefined information includes l. The network device configures the difference between l and m for the first device before step S1010. The first device can determine the first parameter m based on the difference between l and m and l. Of course, in embodiments of the present application, both the first parameter and the second parameter can be configured by the network device.

[0120] In other implementations, the first parameter or the second parameter may also be randomly selected by the network device. For example, the first parameter is configured using m and the second parameter is configured using l. The network device randomly selects l and m and sends information to the first device to indicate m before step S1010.

[0121] In some implementations, time domain resources corresponding to all of the multiple channels reserved by the network device are the same.

[0122] In the embodiments of the present application, the above-mentioned time domain resources are not limited. In some implementations, the time domain resources may include symbols, time slots, subframes, frames, etc. Of course, in the embodiments of the present application, the time domain resources may also include other time domain resources introduced in future communication systems.

[0123] In some implementations, the multiple channels reserved by a network device may include two types of channels: first-type channels and second-type channels. The second-type channels are used by the network device to transmit information to the second device, or in other words, the first-type channels are used by the network device to transmit backscattered input signals to the second device. The first-type channels are used by the first device to perform backscatter transmissions. Accordingly, if the second device is a network device, the first channel belongs to the first-type channel, and the second channel belongs to the second-type channel.

[0124] In some implementations, the time domain resources corresponding to the second-type channels among the multiple channels reserved by the network device include the time domain resources corresponding to the first-type channels. Taking the time domain resources as time slots as an example, the time slot resources corresponding to the second-type channels include the time slot resources corresponding to the first-type channels. Taking the time domain resources as symbols as an example, the symbols corresponding to the second-type channels include the symbols corresponding to the first-type channels.

[0125] In an embodiment of the present application, the time domain resources corresponding to the multiple channels reserved by the network device may be different. This solution can be applicable to network devices that do not support channel monitoring of multiple channels in the same time slot, which helps to improve the scope of application of the embodiment of the present application.

[0126] In some implementations, the time domain resources corresponding to the second type of channels include first time domain resources and second time domain resources, and the time domain resources corresponding to the first type of channels include the second time domain resources, wherein the first time domain resources are earlier than the second time domain resources. This is described below in conjunction with FIG16A.

[0127] In some implementations, if the second device is a network device and the second type of channel includes a second channel, the second information sent by the second device above can be used to determine that the second channel is occupied, wherein the second information occupies the first time domain resources and / or the second time domain resources.

[0128] In some implementations, the second information occupies the first time domain resources and the second time domain resources for transmission, which can be understood as the second information being repeatedly transmitted on the first time domain resources and the second time domain resources.

[0129] It should be noted that if the second information only occupies the first time domain resource for transmission, the unavailability of the second channel in the second time domain resource can be determined based on predefined information or preconfigured information. That is, if other devices only monitor the second information in the first time domain resource and determine that the second channel is occupied, then other devices can determine that the second channel is occupied in the second time domain resource based on the preconfigured or predefined information.

[0130] In the embodiments of the present application, the second information is not limited. In some implementations, the second information can be random information, or in other words, the second information is randomly generated. Accordingly, if other devices detect the second information on the second channel, they can determine that the second channel is occupied. In this case, it can be understood that the second information can implicitly indicate that the second channel is occupied. This is described below in conjunction with Figure 16A.

[0131] Of course, in the embodiment of the present application, the second information may include information with a specific meaning. Accordingly, if other devices detect the second information on the second channel, they can determine that the second channel is occupied. In this case, it can be understood that the second information can implicitly indicate that the second channel is occupied.

[0132] The embodiments of the present application do not limit the meaning of the second information. In some implementations, the second information may include information for triggering the first device. For example, the information for triggering the first device is used to trigger the first device to perform frequency-shift-based backscatter transmission. For another example, the information for triggering the first device is used to wake up the first device for transmission. In other implementations, the second information may include configuration information related to frequency-shift-based backscatter transmission. For example, the configuration information may be used to configure the offset in the frequency domain when the first device performs backscattering, that is, the frequency domain distance between the first channel and the second channel mentioned above. For another example, the configuration information is used to configure the first parameter and / or the second parameter introduced above.

[0133] Of course, in an embodiment of the present application, the second information can explicitly indicate that the first time domain resources and / or the second time domain resources of the second type of channel are occupied, that is, the second information can carry the first time domain resources and / or the second time domain resources of the second type of channel through a field. The field can be predefined, which will be introduced below in conjunction with Figure 16B.

[0134] For ease of understanding, the following describes, in conjunction with Figures 16A and 16B , the time domain resources included in the second-type channel and the first-type channel in an embodiment of the present application, as well as a scheme for determining whether the second channel is occupied based on the second information. Figure 16A describes the example of the second information being random information, and Figure 16B describes the example of the second information including fields that can indicate whether the first and second time domain resources of the second-type channel are occupied.

[0135] Referring to Figure 16A , the first time domain resource includes time slot n, the second time domain resource includes time slot n+1, the second type of channel includes channel 0, the first type of channel includes channel 3, the time domain resources corresponding to the second type of channel include time slot n and time slot n+1, and the time domain resources corresponding to the first type of channel include time slot n+1. The second information is random information, and channel 0 is selected as the second channel. The second device repeatedly transmits the second information via time slot n and time slot n+1 of channel 0, allowing other devices to detect that time slot n and time slot n+1 of channel 0 are occupied and not transmit data on channel 0.

[0136] Continuing with Figure 16A , the first time domain resource includes time slot n, the second time domain resource includes time slot n+1, the second type of channel includes channel 0, the first type of channel includes channel 3, the time domain resources corresponding to the second type of channel include time slot n and time slot n+1, and the time domain resources corresponding to the first type of channel include time slot n+1. The second information is random information, and channel 0 is selected as the second channel. The second device can transmit the second information only through time slot n of channel 0, so that other devices can detect that channel 0 is occupied and not transmit data on channel 0, where channel 0 occupies time slot n and time slot n+1.

[0137] Referring to Figure 16B , the first time domain resources include time slot n, the second time domain resources include time slot n+1, the second type of channel includes channel 0, the first type of channel includes channel 3, the time domain resources corresponding to the second type of channel include time slot n and time slot n+1, and the time domain resources corresponding to the first type of channel include time slot n+1. The second information includes a field that can indicate that channel 0 is occupied in time slot n and time slot n+1, selecting channel 0 as the second channel. The second device sends the second information via time slot n of channel 0, and other devices can determine whether time slot n and time slot n+1 of channel 0 are occupied based on the field in the second information.

[0138] In other implementations, if the second device is a network device, the second device may broadcast second indication information, where the second indication information is used to determine a time to reserve the second channel, and / or the second indication information is used to determine a time to reserve the first channel.

[0139] In the embodiments of the present application, the above-mentioned time is not limited. In some implementations, the time is a duration, for example, the duration includes the time period corresponding to the first time domain resource and / or the second time domain resource of the second type of channel. For example, the time period T in FIG16A is the time period corresponding to time slot n and time slot n+1. In this case, once the other device receives the second indication information, it will not send data on the second channel during the time period T.

[0140] In some implementations, the above time is the number of time domain resources. For example, the time may be the number of time slots or the number of symbols. For example, in FIG16A , the time includes time slot n and time slot n+1.

[0141] In other implementations, when the second indication information is used to determine the reserved time of the first channel (such as time slot n+1), other devices can no longer send during the time of the first channel (such as time slot n+1) once they receive the second indication information, but send data in other time slots of the first channel (such as time slot n).

[0142] In some implementations, the first device receives first indication information sent by the network device, where the first indication information is used to indicate whether to enable or disable a first function, where the first function is used to indicate that a channel for backscattering by the first device is different from a channel for transmitting a backscattered input signal.

[0143] Because the first function is used to instruct the first device to perform backscatter on a channel that is different from the channel used to transmit the backscattered input signal, the first function can also be referred to as a "frequency shift function." Accordingly, the first indication information can be used to instruct the first device to enable or disable the frequency shift function. Of course, in the embodiments of the present application, the first device can also automatically enable or disable the frequency shift function of the first device.

[0144] In some implementations, the first indication information may be carried in a field. For example, if the value of the field is a first value, it indicates that the frequency shift function of the first device is enabled. If the value of the field is a second value, it indicates that the frequency shift function of the first device is disabled. The first value and the second value are different. For example, the first value may be 0 and the second value may be 1. For another example, the first value may be 1 and the second value may be 0.

[0145] In some implementations, if the first condition is met, the first indication information is used to indicate that the first function is enabled, and / or if the first condition is not met, the first indication information is used to indicate that the first function is disabled. The first condition may include one or more of the following conditions: the network device detects that at least two consecutive channels in the frequency domain are idle; the network device detects that at least two channels are idle; the network device detects that at least two channels are idle, and the frequency domain range corresponding to the at least two channels is less than or equal to the number of channels corresponding to the maximum frequency shift of the first device, wherein the at least two channels include the first channel and the second channel.

[0146] In some implementations, when a network device detects that at least two consecutive channels in the frequency domain are idle, it can be understood that the network device can select at least two consecutive channels in the frequency domain from the idle channels detected as the reserved multiple channels. This is described below with reference to FIG17A.

[0147] In some implementations, when a network device detects that at least two channels are idle, it can be understood that the network device can select at least two channels from the idle channels detected as the reserved multiple channels. In the embodiment of the present application, the at least two idle channels detected by the network device are not limited, and the at least two channels can be continuous or discontinuous in the frequency domain. This is described below in conjunction with Figure 17B.

[0148] In some implementations, the network device detects that at least two channels are idle, and the frequency domain range corresponding to the at least two channels is less than or equal to the number of channels corresponding to the maximum frequency shift of the first device, wherein the at least two channels include the first channel and the second channel. This can be understood as the network device selecting at least two channels from the idle channels detected as the reserved multiple channels, and the reserved multiple channels include the first channel and the second channel that can meet the frequency shift capability of the first device. This is described below in conjunction with FIG17C.

[0149] For ease of understanding, the following describes the solution of the first condition in the embodiment of the present application in conjunction with Figures 17A-17C.

[0150] Referring to Figure 17A , the network device detects three idle channels: Channel 0 through Channel 2, which are contiguous in the frequency domain. If the first condition is met, the first indication information is used to enable the first function. After the first function is enabled, the network device can select channel 0 for the second device to transmit signals and notify the first device to transmit backscattered signals on channel 2, and vice versa.

[0151] Referring to Figure 17B , the network device detects an idle channel: Channel 1. If the first condition is not met, the first indication information is used to disable the first function. After the first function is disabled, the second device can transmit signals via Channel 1, while the first device transmits backscatter signals on the same channel.

[0152] Referring to Figure 17C, the network device detects three idle channels: channel 0, channel 1, and channel 2. The number of channels corresponding to the maximum frequency shift of the first device is 4, and the frequency domain range corresponding to the three idle channels is 4. The three channels may include the first channel and the second channel (e.g., the first channel is channel 1, and the second channel is channel 0). If the first condition is met, the first indication information can be used to enable the first function. After the first function is enabled, the network device can select channel 0 for the second device to send a signal, and notify the first device to send a backscattered signal in channel 1, and vice versa.

[0153] In some implementations, when the second device is a network device, before step S1010, if the frequency domain distance between the third channel and the fourth channel reserved by the network device is greater than the frequency shift capability supported by the first device, the network device performs one or more of the following operations: releasing the third channel and the fourth channel, and performing channel listening based on the frequency shift capability supported by the first device; releasing the third channel, and performing channel listening based on the fourth channel and the frequency shift capability supported by the first device; performing channel listening based on the third channel, the fourth channel and the frequency shift capability supported by the first device.

[0154] In some implementations, releasing the third and fourth channels and performing channel sensing based on the frequency shift capability supported by the first device can be understood as the second device releasing the third and fourth channels and performing channel sensing again. The second device can then repeat this process until it finds a channel with a frequency domain distance less than or equal to the frequency shift capability supported by the first device.

[0155] In some implementations, the third channel is released, and channel listening is performed based on the fourth channel and the frequency shift capability supported by the first device. This can be understood as the second device releasing the third channel and performing channel listening again until the second device finds another channel whose frequency domain distance from the fourth channel is less than or equal to the frequency shift capability supported by the first device.

[0156] In some implementations, channel listening is performed based on the third channel, the fourth channel, and the frequency shift capability supported by the first device. It can be understood that the second device does not release any channel and performs channel listening again until another channel is found whose frequency domain distance from the third channel or the fourth channel is less than or equal to the frequency shift capability supported by the first device.

[0157] For ease of understanding, the following describes the three operations that the network device can perform when |mn| is greater than Q, using as an example a case where the frequency shift capability supported by the first device is the first device's maximum frequency shift, the number of channels corresponding to the first device's maximum frequency shift is Q, the third channel is channel m, the fourth channel is n, and the frequency domain distance between the third and fourth channels is |mn|. It should be noted that the network device can repeatedly perform one or more of the following operations until it finds a channel with a frequency domain distance less than or equal to Q.

[0158] Operation 1: Release the third and fourth channels and perform channel sensing based on the frequency shift capability supported by the first device. This can be understood as the network device releasing channels m and n, continuing channel sensing, and performing one or more of operations 1 to 3 until it finds a frequency domain distance between the two channels that is less than or equal to Q. This is described below with reference to FIG18A.

[0159] Operation 2: Release the third channel and perform channel sensing based on the fourth channel and the frequency shift capability supported by the first device. This can be understood as the network device releasing channel m and continuing channel sensing, performing one or more of operations 1 to 3 until a channel is found whose frequency domain distance from channel n is less than or equal to Q. This is described below with reference to FIG18B.

[0160] Operation 3: Channel sensing based on the third channel, the fourth channel, and the frequency shift capability supported by the first device. This can be understood as the network device not releasing channels m and n, but continuing to sense channels, performing one or more of operations 1 through 3, until a channel is found whose frequency domain distance from channel m is less than or equal to Q, or until a channel is found whose frequency domain distance from channel n is less than Q. This is described below with reference to FIG18C.

[0161] The following describes the scheme of the network device performing the above-mentioned multiple operations in an embodiment of the present application in conjunction with Figures 18A-18C. Figure 18A describes the network device performing operation 1 as an example, Figure 18B describes the network device performing operation 2 as an example, and Figure 18C describes the network device performing operation 3 as an example.

[0162] Referring to Figure 18A , assume that the third channel is channel 1, the fourth channel is channel 4, and their Q value is 1. The network device performs operation 1, releasing channels 1 and 2, and then finds channels 2 and 3 that satisfy Q ≥ |3-2|. Channel 2 can be used as the first channel, and channel 3 can be used as the second channel.

[0163] Assume, in Figure 18B , that the third channel is channel 1, the fourth channel is channel 4, and their Q value is 1. The network device performs operation 2, releasing channel 1 and finding channels 3 and 4 that satisfy Q ≥ |4-3|. Channel 3 can be used as the first channel, and channel 4 can be used as the second channel.

[0164] Referring to Figure 18C , assume that the third channel is channel 1, the fourth channel is channel 4, and their Q value is 1. The network device performs operation 3, does not release channel 1, and finds channels 1 and 2 that satisfy Q ≥ |2-1|. Channel 1 can be used as the first channel, and channel 2 can be used as the second channel.

[0165] The method embodiment of the present application is described in detail above in conjunction with Figures 1 to 18 . The device embodiment of the present application is described in detail below in conjunction with Figures 19 to 21 . It should be understood that the description of the method embodiment corresponds to the description of the device embodiment. Therefore, for portions not described in detail, reference can be made to the above method embodiment.

[0166] FIG19 is a schematic diagram of a communication device according to an embodiment of the present application, wherein the communication device is a second device. The communication device 1900 shown in FIG19 includes: a receiving unit 1910 .

[0167] The receiving unit 1910 is configured to receive first information sent by a first device through a first channel, where the first information is transmitted in a backscattering manner. The first channel is reserved by a network device for the first device.

[0168] In some implementations, the communication device further includes: a sending unit, configured to send second information to the first device via a second channel, where the second channel is different from the first channel.

[0169] In some implementations, the first channel and the second channel belong to multiple channels reserved by the network device, all of the multiple channels are continuous in the frequency domain, or some or all of the multiple channels are discontinuous in the frequency domain.

[0170] In some implementations, the frequency domain ranges corresponding to the multiple channels are associated with one or more of the following: capabilities of the network device, the capabilities of the network device are associated with channel sensing; and frequency shift capabilities supported by the first device.

[0171] In some implementations, the capability of the network device is used to indicate the maximum number of channels supported by the network device for channel sensing; and / or whether the network device supports channel sensing of discrete channels in the frequency domain.

[0172] In some implementations, the first channel is associated with a first parameter, the first parameter being used to select the first channel from the plurality of channels; and / or the second channel is associated with a second parameter, the second parameter being used to select the second channel from the plurality of channels.

[0173] In some implementations, the first parameter and / or the second parameter is determined by one or more of the following: pre-configuration information; pre-defined information; configuration information sent by the network device.

[0174] In some implementations, the time domain resources corresponding to all of the multiple channels are the same.

[0175] In some implementations, the time domain resources corresponding to the second type of channels among the multiple channels include the time domain resources corresponding to the first type of channels, wherein the second type of channels are used by the network device to send information to the first device, and the first type of channels are used by the first device to perform the backscatter transmission.

[0176] In some implementations, it is characterized in that the time domain resources corresponding to the second type of channel include first time domain resources and second time domain resources, and the time domain resources corresponding to the first type of channel include the second time domain resources, wherein the first time domain resources are earlier than the second time domain resources.

[0177] In some implementations, if the second device is a network device and the second type of channel includes the second channel, the second information is used to determine whether the second channel is occupied, wherein the second information occupies the first time domain resources and / or the second time domain resources.

[0178] In some implementations, if the second device is a network device, the communication device further includes: the second device broadcasts second indication information, the second indication information is used to determine the time to reserve the second channel, and / or the second indication information is used to determine the time to reserve the first channel.

[0179] In some implementations, the second device is a network device, and the communication device further includes: the first device receives first indication information sent by the network device, the first indication information is used to indicate whether to start or disable a first function, and the first function is used to indicate that the channel for the first device to perform the backscattering is different from the channel for transmitting the input signal for the backscattering.

[0180] In some implementations, if a first condition is met, the first indication information is used to indicate the start of the first function, and / or if the first condition is not met, the first indication information is used to indicate the prohibition of the first function, wherein the first condition includes one or more of the following: the network device monitors that at least two consecutive channels in the frequency domain are in an idle state; the network device monitors that at least two channels are in an idle state; the network device monitors that at least two channels are in an idle state, and the frequency domain range corresponding to the at least two channels is less than or equal to the number of channels corresponding to the maximum frequency shift of the first device, wherein the at least two channels include the first channel and the second channel.

[0181] In some implementations, the second device is the network device, and before the second device receives the first information sent by the first device through the first channel, the communication device further includes: a processing unit, and if the frequency domain distance between the third channel and the fourth channel reserved by the network device is greater than the frequency shift capability supported by the first device, the processing unit is used to perform one or more of the following operations: releasing the third channel and the fourth channel, and performing channel listening based on the frequency shift capability supported by the first device; releasing the third channel, and performing channel listening based on the fourth channel and the frequency shift capability supported by the first device; performing channel listening based on the third channel, the fourth channel and the frequency shift capability supported by the first device.

[0182] FIG20 is a schematic diagram of a communication device according to an embodiment of the present application, wherein the communication device is a first device. The communication device 2000 shown in FIG20 includes: a sending unit 2010 .

[0183] The sending unit 2010 is configured to send first information to the second device via a first channel, where the first information is transmitted in a backscattering manner. The first channel is reserved by a network device for the first device.

[0184] In some implementations, the communication device further includes: a receiving unit, configured to receive second information sent by a second device through a second channel, where the second channel is reserved by the network device for the first device, and the second channel is different from the first channel.

[0185] In some implementations, the first channel and the second channel belong to multiple channels reserved by the network device, all of the multiple channels are continuous in the frequency domain, or some or all of the multiple channels are discontinuous in the frequency domain.

[0186] In some implementations, the frequency domain ranges corresponding to the multiple channels are associated with one or more of the following: a maximum number of channels supported by the network device for channel sensing; and a frequency shift capability supported by the first device.

[0187] In some implementations, the capability of the network device is used to indicate the maximum number of channels supported by the network device for channel sensing; and / or whether the network device supports channel sensing of discrete channels in the frequency domain.

[0188] In some implementations, the first channel is associated with a first parameter, the first parameter being used to select the first channel from the plurality of channels; and / or the second channel is associated with a second parameter, the second parameter being used to select the second channel from the plurality of channels.

[0189] In some implementations, the first parameter and / or the second parameter is determined by one or more of the following: pre-configuration information; pre-defined information; configuration information sent by the network device.

[0190] In some implementations, the time domain resources corresponding to all of the multiple channels are the same.

[0191] In some implementations, the time domain resources corresponding to the second type of channels among the multiple channels include the time domain resources corresponding to the first type of channels, wherein the second type of channels are used by the network device to send information to the first device, and the first type of channels are used by the first device to perform the backscatter transmission.

[0192] In some implementations, the time domain resources corresponding to the second type of channel include first time domain resources and second time domain resources, and the time domain resources corresponding to the first type of channel include the second time domain resources, wherein the first time domain resources are earlier than the second time domain resources.

[0193] In some implementations, the communication device further includes: the first device receives first indication information sent by the network device, the first indication information is used to indicate whether to start or disable a first function, and the first function is used to indicate that the channel on which the first device performs the backscattering is different from the channel on which the input signal for transmitting the backscattering is transmitted.

[0194] In some implementations, if a first condition is met, the first indication information is used to indicate the start of the first function, and / or if the first condition is not met, the first indication information is used to indicate the prohibition of the first function, wherein the first condition includes one or more of the following: the network device monitors that at least two consecutive channels in the frequency domain are in an idle state; the network device monitors that at least two channels are in an idle state; the network device monitors that at least two channels are in an idle state, and the frequency domain range corresponding to the at least two channels is less than or equal to the number of channels corresponding to the maximum frequency shift of the first device.

[0195] In an optional embodiment, the sending unit 1910 may be a transceiver 2130. The communication device 1900 may further include a processor 2110 and a memory 2120, as specifically shown in FIG21 .

[0196] In an optional embodiment, the sending unit 2010 may be a transceiver 2130. The communication device 2000 may further include a processor 2110 and a memory 2120, as specifically shown in FIG21 .

[0197] Figure 21 is a schematic block diagram of a communication device according to an embodiment of the present application. The dashed lines in Figure 21 indicate that the unit or module is optional. The device 2100 may be used to implement the method described in the above method embodiment. The device 2100 may be a chip, a terminal device, or a network device.

[0198] The device 2100 may include one or more processors 2110. The processor 2110 may support the device 2100 to implement the method described in the above method embodiment. The processor 2110 may be a general-purpose processor or a special-purpose processor. For example, the processor may be a central processing unit (CPU). Alternatively, the processor may be another general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic device, discrete hardware component, etc. The general-purpose processor may be a microprocessor or the processor may be any conventional processor, etc.

[0199] The apparatus 2100 may further include one or more memories 2120. The memories 2120 store programs that can be executed by the processor 2110, causing the processor 2110 to perform the methods described in the above method embodiments. The memories 2120 may be independent of the processor 2110 or integrated into the processor 2110.

[0200] The apparatus 2100 may further include a transceiver 2130. The processor 2110 may communicate with other devices or chips via the transceiver 2130. For example, the processor 2110 may transmit and receive data with other devices or chips via the transceiver 2130.

[0201] The present application also provides a computer-readable storage medium for storing a program. The computer-readable storage medium can be applied to a terminal or network device provided in the present application, and the program enables a computer to execute the method performed by the terminal or network device in each embodiment of the present application.

[0202] The present application also provides a computer program product. The computer program product includes a program. The computer program product can be applied to a terminal or network device provided in the present application, and the program causes a computer to execute the method performed by the terminal or network device in each embodiment of the present application.

[0203] The embodiments of the present application also provide a computer program. The computer program can be applied to the terminal or network device provided in the embodiments of the present application, and the computer program enables a computer to execute the method performed by the terminal or network device in each embodiment of the present application.

[0204] It should be understood that the terms "system" and "network" in this application can be used interchangeably. In addition, the terms used in this application are only used to explain the specific embodiments of this application and are not intended to limit this application. The terms "first", "second", "third", and "fourth" in the specification and claims of this application and the accompanying drawings are used to distinguish different objects rather than to describe a specific order. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions.

[0205] In the embodiments of this application, the term "indication" may refer to a direct indication, an indirect indication, or an indication of an association. For example, "A indicates B" may refer to a direct indication of B, e.g., B can obtain information through A; it may refer to an indirect indication of B, e.g., A indicates C, e.g., B can obtain information through C; or it may refer to an association between A and B.

[0206] In the embodiments of the present application, the term "corresponding" may indicate a direct or indirect correspondence between the two, or an association relationship between the two, or a relationship between indication and indication, configuration and configuration, etc.

[0207] In the embodiments of the present application, "pre-definition" or "pre-configuration" may be implemented by pre-storing corresponding codes, tables, or other methods that can be used to indicate relevant information in a device (e.g., a terminal device and a network device). The present application does not limit the specific implementation method. For example, pre-definition may refer to information defined in a protocol.

[0208] In the embodiments of the present application, the “protocol” may refer to a standard protocol in the communications field, for example, it may include an LTE protocol, an NR protocol, and related protocols used in future communication systems, and the present application does not limit this.

[0209] In the embodiments of this application, the term "and / or" is simply a description of the association relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this document generally indicates that the related objects are in an "or" relationship.

[0210] 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.

[0211] 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.

[0212] 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.

[0213] In the above embodiments, it can be implemented in whole or in part by software, hardware, firmware or any combination thereof. When implemented using software, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the process or function described in the embodiment of the present application is generated in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions can be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer instructions can be transmitted from one website, computer, server or data center to another website, computer, server or data center via a wired (e.g., coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) method. The computer-readable storage medium can be any available medium that can be read by a computer or a data storage device such as a server or data center that includes one or more available media integrated therein. The available medium may be a magnetic medium (eg, a floppy disk, a hard disk, a magnetic tape), an optical medium (eg, a digital versatile disc (DVD)), or a semiconductor medium (eg, a solid state disk (SSD)).

[0214] 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 this application should be included in the scope of protection of this application. Therefore, the scope of protection of this application should be based on the scope of protection of the claims.

Claims

1. A wireless communication method, characterized in that: include: The second device receives first information sent by the first device through a first channel, where the first information is transmitted in a backscattering manner. The first channel is reserved by a network device for the first device.

2. The method according to claim 1, wherein The method further comprises: The second device sends second information to the first device through a second channel, where the second channel is different from the first channel.

3. The method according to claim 2, wherein The first channel and the second channel belong to a plurality of channels reserved by the network device, and all of the plurality of channels are continuous in the frequency domain, or Some or all of the multiple channels are discontinuous in the frequency domain.

4. The method according to claim 3, wherein The frequency domain ranges corresponding to the multiple channels are associated with one or more of the following: The capability of the network device, wherein the capability of the network device is associated with channel sensing; The frequency shift capability supported by the first device.

5. The method according to claim 4, wherein The capability of the network device is used to indicate the maximum number of channels supported by the network device for channel sensing; and / or Whether the network device supports channel sensing on discrete channels in the frequency domain.

6. The method according to any one of claims 3 to 5, wherein: The first channel is associated with a first parameter, and the first parameter is used to select the first channel from the plurality of channels; and / or A second parameter is associated with the second channel, and the second parameter is used to select the second channel from the plurality of channels.

7. The method according to claim 6, wherein The first parameter and / or the second parameter are determined by one or more of the following: Preconfiguration information; Predefined information; Configuration information sent by the network device.

8. The method according to any one of claims 3 to 7, wherein The time domain resources corresponding to all the multiple channels are the same.

9. The method according to any one of claims 3 to 7, wherein: The time domain resources corresponding to the second type of channels among the multiple channels include the time domain resources corresponding to the first type of channels, wherein the second type of channels are used by the network device to send information to the first device, and the first type of channels are used by the first device to perform the backscatter transmission.

10. The method according to claim 9, wherein The time domain resources corresponding to the second type of channels include first time domain resources and second time domain resources, and the time domain resources corresponding to the first type of channels include the second time domain resources, wherein the first time domain resources are earlier than the second time domain resources.

11. The method according to claim 10, wherein If the second device is a network device, and the second type of channel includes the second channel, the second information is used to determine whether the second channel is occupied. The second information occupies the first time domain resources and / or the second time domain resources.

12. The method according to claim 10, wherein If the second device is a network device, the method further includes: The second device broadcasts second indication information, where the second indication information is used to determine a time to reserve the second channel, and / or The second indication information is used to determine a time to reserve the first channel.

13. The method according to any one of claims 1 to 11, wherein The method further comprises: The first device receives first indication information sent by the network device, where the first indication information is used to indicate starting or disabling a first function, where the first function is used to indicate that the channel on which the first device performs the backscattering is different from the channel on which the input signal for transmitting the backscattering is transmitted.

14. The method according to claim 13, wherein If the first condition is met, the first indication information is used to indicate starting the first function, and / or If the first condition is not met, the first indication information is used to indicate that the first function is prohibited. The first condition includes one or more of the following: The network device detects that at least two consecutive channels in the frequency domain are in an idle state; The network device detects that at least two channels are in an idle state; The network device detects that at least two channels are in an idle state, and the frequency domain range corresponding to the at least two channels is less than or equal to the number of channels corresponding to the maximum frequency shift of the first device. The at least two channels include the first channel and the second channel.

15. The method according to any one of claims 2 to 14, wherein: The second device is the network device. Before the second device receives the first information sent by the first device through the first channel, the method further includes: If the frequency domain distance between the third channel and the fourth channel reserved by the network device is greater than the frequency shift capability supported by the first device, the network device performs one or more of the following operations: releasing the third channel and the fourth channel, and performing channel sensing based on a frequency shift capability supported by the first device; releasing the third channel, and performing channel sensing based on the fourth channel and a frequency shift capability supported by the first device; Channel sensing is performed based on the third channel, the fourth channel, and a frequency shift capability supported by the first device.

16. A wireless communication method, characterized in that: include: The first device sends first information to the second device through a first channel, where the first information is transmitted in a backscattering manner. The first channel is reserved by a network device for the first device.

17. The method according to claim 16, wherein The method further comprises: The first device receives second information sent by the second device through a second channel, where the second channel is reserved by the network device for the first device, and the second channel is different from the first channel.

18. The method according to claim 17, wherein The first channel and the second channel belong to a plurality of channels reserved by the network device, and all of the plurality of channels are continuous in the frequency domain, or Some or all of the multiple channels are discontinuous in the frequency domain.

19. The method according to claim 18, wherein The frequency domain ranges corresponding to the multiple channels are associated with one or more of the following: The maximum number of channels supported by the network device for channel sensing; The frequency shift capability supported by the first device.

20. The method according to claim 19, wherein The capability of the network device is used to indicate the maximum number of channels supported by the network device for channel sensing; and / or Whether the network device supports channel sensing on discrete channels in the frequency domain.

21. The method according to any one of claims 18 to 20, wherein The first channel is associated with a first parameter, and the first parameter is used to select the first channel from the plurality of channels; and / or A second parameter is associated with the second channel, and the second parameter is used to select the second channel from the plurality of channels.

22. The method according to claim 21, wherein The first parameter and / or the second parameter are determined by one or more of the following: Preconfiguration information; Predefined information; Configuration information sent by the network device.

23. The method according to any one of claims 18 to 22, wherein The time domain resources corresponding to all the multiple channels are the same.

24. The method according to any one of claims 18 to 22, wherein The time domain resources corresponding to the second type of channels among the multiple channels include the time domain resources corresponding to the first type of channels, wherein the second type of channels are used by the network device to send information to the first device, and the first type of channels are used by the first device to perform the backscatter transmission.

25. The method of claim 24, wherein: The time domain resources corresponding to the second type of channels include first time domain resources and second time domain resources, and the time domain resources corresponding to the first type of channels include the second time domain resources, wherein the first time domain resources are earlier than the second time domain resources.

26. The method according to any one of claims 16 to 25, wherein The method further comprises: The first device receives first indication information sent by the network device, where the first indication information is used to indicate starting or disabling a first function, where the first function is used to indicate that the channel on which the first device performs the backscattering is different from the channel on which the input signal for transmitting the backscattering is transmitted.

27. The method according to claim 26, wherein If the first condition is met, the first indication information is used to indicate starting the first function, and / or If the first condition is not met, the first indication information is used to indicate that the first function is prohibited. The first condition includes one or more of the following: The network device detects that at least two consecutive channels in the frequency domain are in an idle state; The network device detects that at least two channels are in an idle state; The network device detects that at least two channels are in an idle state, and the frequency domain range corresponding to the at least two channels is less than or equal to the number of channels corresponding to the maximum frequency shift of the first device.

28. A communication device, characterized in that: The communication device is a second device, and the communication device includes: a receiving unit, configured to receive first information sent by a first device through a first channel, wherein the first information is transmitted in a backscattering manner, The first channel is reserved by the network device for the first device.

29. The communication device according to claim 28, wherein The communication device further includes: A sending unit is configured to send second information to the first device through a second channel, where the second channel is different from the first channel.

30. The communication device according to claim 29, wherein The first channel and the second channel belong to a plurality of channels reserved by the network device, and all of the plurality of channels are continuous in the frequency domain, or Some or all of the multiple channels are discontinuous in the frequency domain.

31. The communication device according to claim 30, wherein The frequency domain ranges corresponding to the multiple channels are associated with one or more of the following: The capability of the network device, wherein the capability of the network device is associated with channel sensing; The frequency shift capability supported by the first device.

32. The communication device according to claim 31, wherein The capability of the network device is used to indicate the maximum number of channels supported by the network device for channel sensing; and / or Whether the network device supports channel sensing on discrete channels in the frequency domain.

33. The communication device according to any one of claims 30 to 32, characterized in that: The first channel is associated with a first parameter, and the first parameter is used to select the first channel from the plurality of channels; and / or A second parameter is associated with the second channel, and the second parameter is used to select the second channel from the plurality of channels.

34. The communication device according to claim 33, wherein The first parameter and / or the second parameter are determined by one or more of the following: Preconfiguration information; Predefined information; Configuration information sent by the network device.

35. The communication device according to any one of claims 30 to 34, characterized in that: The time domain resources corresponding to all the multiple channels are the same.

36. The communication device according to any one of claims 30 to 34, characterized in that The time domain resources corresponding to the second type of channels among the multiple channels include the time domain resources corresponding to the first type of channels, wherein the second type of channels are used by the network device to send information to the first device, and the first type of channels are used by the first device to perform the backscatter transmission.

37. The communication device according to claim 36, wherein The time domain resources corresponding to the second type of channels include first time domain resources and second time domain resources, and the time domain resources corresponding to the first type of channels include the second time domain resources, wherein the first time domain resources are earlier than the second time domain resources.

38. The communication device according to claim 37, wherein If the second device is a network device, and the second type of channel includes the second channel, the second information is used to determine whether the second channel is occupied. The second information occupies the first time domain resources and / or the second time domain resources.

39. The communication device according to claim 37, wherein If the second device is a network device, the communication device further includes: The second device broadcasts second indication information, where the second indication information is used to determine a time to reserve the second channel, and / or The second indication information is used to determine a time to reserve the first channel.

40. The communication device according to any one of claims 28 to 39, characterized in that The second device is a network device, and the communication device further includes: The first device receives first indication information sent by the network device, where the first indication information is used to indicate starting or disabling a first function, where the first function is used to indicate that the channel on which the first device performs the backscattering is different from the channel on which the input signal for transmitting the backscattering is transmitted.

41. The communication device according to claim 40, wherein If the first condition is met, the first indication information is used to indicate starting the first function, and / or If the first condition is not met, the first indication information is used to indicate that the first function is prohibited. The first condition includes one or more of the following: The network device detects that at least two consecutive channels in the frequency domain are in an idle state; The network device detects that at least two channels are in an idle state; The network device detects that at least two channels are in an idle state, and the frequency domain range corresponding to the at least two channels is less than or equal to the number of channels corresponding to the maximum frequency shift of the first device. The at least two channels include the first channel and the second channel.

42. The communication device according to any one of claims 29 to 41, characterized in that The second device is the network device. Before the second device receives the first information sent by the first device through the first channel, the communication device further includes: a processing unit, configured to, if the frequency domain distance between the third channel and the fourth channel reserved by the network device is greater than the frequency shift capability supported by the first device, perform one or more of the following operations: releasing the third channel and the fourth channel, and performing channel sensing based on a frequency shift capability supported by the first device; releasing the third channel, and performing channel sensing based on the fourth channel and a frequency shift capability supported by the first device; Channel sensing is performed based on the third channel, the fourth channel, and a frequency shift capability supported by the first device.

43. A communication device, characterized in that The communication device is a first device, and the communication device includes: A sending unit is configured to send first information to a second device via a first channel, where the first information is transmitted in a backscattering manner, and the first channel is reserved by a network device for the first device.

44. The communication device according to claim 43, wherein The communication device further includes: The receiving unit is configured to receive second information sent by a second device through a second channel, where the second channel is reserved by the network device for the first device, and the second channel is different from the first channel.

45. The communication device according to claim 44, wherein The first channel and the second channel belong to a plurality of channels reserved by the network device, and all of the plurality of channels are continuous in the frequency domain, or Some or all of the multiple channels are discontinuous in the frequency domain.

46. ​​The communication device according to claim 45, wherein The frequency domain ranges corresponding to the multiple channels are associated with one or more of the following: The maximum number of channels supported by the network device for channel sensing; The frequency shift capability supported by the first device.

47. The communication device according to claim 46, wherein The capability of the network device is used to indicate the maximum number of channels supported by the network device for channel sensing; and / or Whether the network device supports channel sensing on discrete channels in the frequency domain.

48. The communication device according to any one of claims 45 to 47, characterized in that The first channel is associated with a first parameter, and the first parameter is used to select the first channel from the plurality of channels; and / or A second parameter is associated with the second channel, and the second parameter is used to select the second channel from the plurality of channels.

49. The communication device according to claim 48, wherein The first parameter and / or the second parameter are determined by one or more of the following: Preconfiguration information; Predefined information; Configuration information sent by the network device.

50. The communication device according to any one of claims 45 to 49, characterized in that The time domain resources corresponding to all the multiple channels are the same.

51. The communication device according to any one of claims 45 to 49, characterized in that The time domain resources corresponding to the second type of channels among the multiple channels include the time domain resources corresponding to the first type of channels, wherein the second type of channels are used by the network device to send information to the first device, and the first type of channels are used by the first device to perform the backscatter transmission.

52. The communication device according to claim 51, wherein The time domain resources corresponding to the second type of channels include first time domain resources and second time domain resources, and the time domain resources corresponding to the first type of channels include the second time domain resources, wherein the first time domain resources are earlier than the second time domain resources.

53. The communication device according to any one of claims 43 to 52, characterized in that The communication device further includes: The first device receives first indication information sent by the network device, where the first indication information is used to indicate starting or disabling a first function, where the first function is used to indicate that the channel on which the first device performs the backscattering is different from the channel on which the input signal for transmitting the backscattering is transmitted.

54. The communication device according to claim 53, wherein If the first condition is met, the first indication information is used to indicate starting the first function, and / or If the first condition is not met, the first indication information is used to indicate that the first function is prohibited. The first condition includes one or more of the following: The network device detects that at least two consecutive channels in the frequency domain are in an idle state; The network device detects that at least two channels are in an idle state; The network device detects that at least two channels are in an idle state, and the frequency domain range corresponding to the at least two channels is less than or equal to the number of channels corresponding to the maximum frequency shift of the first device.

55. A communication device, characterized in that The communication device comprises a transceiver, a memory and a processor, wherein the memory is used to store a program, and the processor is used to call the program in the memory and control the transceiver to receive or send a signal, so that the communication device executes the method according to any one of claims 1 to 15.

56. A communication device, characterized in that The communication device comprises a transceiver, a memory and a processor, wherein the memory is used to store a program, and the processor is used to call the program in the memory and control the transceiver to receive or send a signal, so that the communication device executes the method according to any one of claims 16 to 27.

57. A device, characterized in that The device comprises a processor configured to call a program from a memory so as to enable the device to execute the method according to any one of claims 1 to 27.

58. A chip, characterized in that: The device comprises a processor configured to call a program from a memory so that a device equipped with the chip executes the method according to any one of claims 1 to 27.

59. A computer-readable storage medium, characterized in that A program is stored thereon, the program causing a computer to execute the method according to any one of claims 1 to 27.

60. A computer program product, characterized in that The method comprises a program for causing a computer to execute the method according to any one of claims 1 to 27.

61. A computer program, characterized in that The computer program causes a computer to execute the method according to any one of claims 1 to 27.

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