Wireless communication method and apparatus

Abstract

Embodiments of this application provide a wireless communication method and apparatus. The method includes the step of obtaining at least one time-domain resource, which includes a target time-domain resource corresponding to a second device, in at least one of the multiple channels by channel access. In this application, by the first device obtaining at least one time-domain resource, which includes a target time-domain resource corresponding to a second device, in at least one of the multiple channels by channel access, the second device can achieve wireless communication in the unlicensed frequency spectrum and reduce collisions and interference with other devices.

Description

Technical Field

[0001] Embodiments of the present application relate to the field of communications, and more specifically, to wireless communication methods and devices.

Background Art

[0002] Zero-power devices have low complexity, low cost, can achieve maintenance-free and battery-free operation, can support energy harvesting and / or backscatter communication, and can achieve low-cost, high-density, and large-scale deployment. In addition, the use of unlicensed frequency bands is also an important deployment scenario in cellular communication systems. However, since zero-power devices do not have channel access capabilities, when using unlicensed frequency spectra, how to enable zero-power terminals to communicate in unlicensed frequency spectra and reduce collisions and interference with other devices is a technical problem to be solved in the art.

Summary of the Invention

Means for Solving the Problems

[0003] Embodiments of the present application provide a wireless communication method and device that enable communication in an unlicensed frequency spectrum and reduce collisions and interference with other devices.

[0004] In a first aspect, an embodiment of the present application is a wireless communication method applied to a first device, including: obtaining at least one time domain resource including target time domain resources corresponding to a second device in at least one of the plurality of channels by accessing the plurality of channels.

[0005] In a second aspect, an embodiment of the present application is a wireless communication method applied to a second device, including: receiving a first signal transmitted from a first device. The information carried by the first signal includes first information, the first information being for indicating that at least one time-domain resource acquired by the first device through channel access to a plurality of channels, on at least one of the plurality of channels, includes a target time-domain resource corresponding to the second device, or the first information being for indicating the target time-domain resource.

[0006] In a third aspect, embodiments of the present application provide a first apparatus for carrying out the methods in the first aspect or each embodiment described above. Specifically, the first apparatus includes a functional module for carrying out the methods in the first aspect or each embodiment described above.

[0007] In one embodiment, the first device may include a processing unit for performing functions related to information processing. For example, the processing unit may be a processor.

[0008] In one embodiment, the first device may include a transmitting unit and / or a receiving unit. The transmitting unit is for performing functions related to transmission, and the receiving unit is for performing functions related to reception. For example, the transmitting unit may be a transmitter or transmitter, and the receiving unit may be a receiver or receiver. Alternatively, for example, the first device may be a communication chip, and the transmitting unit may be an input circuit or interface of the communication chip, or an output circuit or interface of the communication chip.

[0009] In a fourth aspect, embodiments of the present application provide a second apparatus for carrying out the methods in the second aspect or each embodiment described above. Specifically, the second apparatus includes a functional module for carrying out the methods in the second aspect or each embodiment described above.

[0010] In one embodiment, the second device may include a processing unit for performing information processing-related functions. For example, the processing unit may be a processor.

[0011] In one embodiment, the second device may include a transmitting unit and / or a receiving unit. The transmitting unit is for performing functions related to transmission, and the receiving unit is for performing functions related to reception. For example, the transmitting unit may be a transmitter or transmitter, and the receiving unit may be a receiver or receiver. Alternatively, for example, the second device may be a communication chip, the receiving unit may be an input circuit or interface of the communication chip, and the transmitting unit may be an output circuit or interface of the communication chip.

[0012] In a fifth aspect, an embodiment of the present application provides a first device comprising a processor, memory, and transceiver. The memory is for storing computer programs, and the processor is for calling and executing the computer programs stored in the memory in order to cause the transceiver to perform the methods of the first aspect or each embodiment described above.

[0013] In one embodiment, the processor is one or more, and the memory is one or more.

[0014] In one embodiment, the memory may be integrated with the processor, or it may be provided separately from the processor.

[0015] In one embodiment, the transceiver includes a transmitter and a receiver.

[0016] In a sixth aspect, an embodiment of the present application provides a second device comprising a processor, memory, and a transceiver. The memory is for storing computer programs, and the processor is for calling and executing the computer programs stored in the memory in order to cause the transceiver to perform the methods of the second aspect or each embodiment described above.

[0017] In one embodiment, the processor is one or more, and the memory is one or more.

[0018] In one embodiment, the memory may be integrated with the processor, or it may be provided separately from the processor.

[0019] In one embodiment, the transceiver includes a transmitter and a receiver.

[0020] In a seventh aspect, an embodiment of the present application provides a chip for carrying out any of the first to second aspects or the methods in each embodiment described above. Specifically, the chip includes a processor that calls and executes a computer program from memory in order to cause a device equipped with the chip to carry out any of the first to second aspects or the methods in each embodiment described above.

[0021] In the eighth aspect, an embodiment of the present application provides a computer-readable storage medium for storing a computer program that, when executed on a computer, causes the computer to execute any of the first to second aspects described above or the methods in each of those embodiments.

[0022] In the ninth aspect, an embodiment of the present application provides a computer program product that includes computer program instructions causing a computer to execute any of the first to second aspects described above or the methods in each embodiment thereof.

[0023] In the tenth aspect, an embodiment of the present application provides a computer program that causes a computer to execute the method according to any one of the first aspect to the second aspect or each embodiment thereof when executed on the computer.

[0024] According to the above technical solution, by accessing channels to a plurality of channels, at least one time domain resource including a target time domain resource corresponding to a second device in at least one of the plurality of channels is acquired, so as to realize wireless communication in the license-free frequency spectrum of the second device and reduce collisions and interference with other devices.

Brief Description of Drawings

[0025] [Figure 1] It is a schematic diagram of a communication system according to an embodiment of the present application. [Figure 2] It is an example of a PPDU according to an embodiment of the present application. [Figure 3] It is an example of a frame format of a MAC frame according to an embodiment of the present application. [Figure 4] It is a schematic flowchart of a wireless communication method according to an embodiment of the present application. [[ID=2,3]] [Figure 5] It is an example of a channel access procedure according to an embodiment of the present application. [Figure 6] It is another example of a channel access procedure according to an embodiment of the present application. [Figure 7] It is an example of a resource unit according to an embodiment of the present application. [Figure 8] It is a schematic block diagram of a first device according to an embodiment of the present application. [Figure 9] It is a schematic block diagram of a second device according to an embodiment of the present application. [Figure 10] It is a schematic block diagram of a fourth device according to an embodiment of the present application. [Figure 11] It is a schematic block diagram of a chip according to an embodiment of the present application.

Embodiments for Carrying out the Invention

[0026] The technical means relating to the embodiments of this application will be described below with reference to the attached drawings.

[0027] The embodiments of this application can be applied to various communication systems. For example, applicable communication systems include Global System of Mobile communication (GSM) systems, Code Division Multiple Access (CODE) systems, Wideband Code Division Multiple Access (WCDMA) systems, General Packet Radio Service (GPRS) systems, Long Term Evolution (LTE) systems, Advanced long term evolution (LTE-A) systems, New Radio (NR) systems, NR system evolution systems, LTE-based access to unlicensed spectrum (LTE-U) systems, NR-based access to unlicensed spectrum (NR-U) systems, Universal Mobile Telecommunication System (UMTS), Wireless Local Area Network (WLAN), and Wireless Fidelity (Wireless Examples include, but are not limited to, Fidelity (WiFi), next-generation communication systems, zero-power communication systems, cellular IoT, cellular passive IoT, or other communication systems.

[0028] Here, cellular IoT is a product that has evolved from the combination of cellular mobile communication networks and IoT, and is also called passive cellular IoT, combining network devices and passive terminals. In cellular passive IoT, passive terminals can communicate with other passive terminals via network devices, or passive terminals can communicate using device-to-device (D2D) communication methods, and network devices only need to transmit carrier signals, i.e., energy supply signals, to supply energy to passive terminals.

[0029] Conventional communication systems typically have a limited number of connections they can support and are easy to implement. However, with the advancement of communication technology, mobile communication systems now support not only conventional communication but also, for example, D2D communication, machine-to-machine (M2M) communication, machine-type communication (MTC), and vehicle-to-vehicle (V2V) communication. The embodiments of this application can also be applied to these communication systems.

[0030] It should be understood that the communication systems in the embodiments of this application are applicable to carrier aggregation (CA) scenarios, dual connectivity (DC) scenarios, and standalone (SA) network construction scenarios. The embodiments of this application are not limited to the applicable frequency spectrum. For example, the embodiments of this application may be applied to licensed frequency spectra or unlicensed frequency spectra.

[0031] Figure 1 is a schematic diagram of a communication system 100 according to an embodiment of this application.

[0032] As shown in Figure 1, the communication system 100 may include a network device 110 that communicates with terminal devices 120 (or communication terminals, referred to as terminals). The network device 110 can provide communication coverage in a specific geographical area and can communicate with terminal devices located within that coverage area.

[0033] For example, the network device 110 may be a device for communicating with a mobile device, and the network device 110 may be an access point (AP) in a WLAN, a base transceiver station (BTS) in GSM or CDMA, a base station (NodeB, NB) in WCDMA, an evolutionary base station (Evolutional Node B, eNB, or eNodeB) in LTE, or a relay station or access point, or an in-vehicle device, a wearable device, a network device (gNB) in an NR network, or a network device in a future evolving PLMN network.

[0034] Here, the network device 110 provides services to the cell, and the terminal device 120 communicates with the network device using the transmission resources (e.g., frequency domain resources or frequency spectrum resources) utilized by the cell. The cell may be a cell corresponding to the network device 110 (e.g., a base station), and the cell may belong to a macro base station or to a base station corresponding to a small cell. Here, the small cell may include a metro cell, micro cell, pico cell, femto cell, etc. These small cells have the characteristics of low coverage and low transmission power, and are suitable for providing high-speed data transmission services.

[0035] For example, terminal equipment 120 is also called user equipment (UE), access terminal, subscriber unit, subscriber station, mobile station, mobile console, remote station, remote terminal, mobile device, user terminal, terminal, wireless communication device, user agent, or user equipment. Terminal equipment may be a station (ST) in a WLAN, a mobile phone, cordless phone, SIP (Session Initiation Protocol) phone, WLL (Wireless Local Loop) station, personal digital assistant (PDA) device, handheld device with wireless communication capabilities, computing device, or other processing device connected to a wireless modem, in-vehicle device, wearable device, and next-generation communication system, such as terminal equipment in an NR network or terminal equipment in a future evolving Public Land Mobile Network (PLMN) network, or zero-power device.

[0036] For example, the terminal device 120 may be a wearable device. Wearable devices, also called wearable smart devices, are a general term for devices that apply wearable technology to intelligently design everyday wear and develop wearable devices such as glasses, gloves, watches, clothing, and shoes. Wearable devices are portable devices that are worn directly or incorporated into the user's clothing or accessories. Wearable devices are not merely hardware devices, but achieve powerful functionality through software support and data interaction and cloud interaction. Wearable smart devices in a broad sense include, for example, fully functional, large-sized devices that can function completely or partially without relying on a smartphone, such as smartwatches or smart glasses, and devices that focus only on specific types of application functions and need to be used in combination with other devices such as smartphones, such as various smart bracelets and smart jewelry that monitor vital signs.

[0037] Furthermore, for example, the terminal device 120 may be a zero-power device. A zero-power device can be understood as a device whose power consumption is below a preset power consumption. Examples include passive terminals and even semi-passive terminals.

[0038] Figure 1 is merely an example of this application and should not be interpreted as limiting this application.

[0039] For example, in other alternative embodiments, the communication system 100 may include a plurality of network devices, and each network device may include a number of other terminal devices within its coverage. Also, for example, devices having communication functions within the network / system in the embodiments of this application may be called communication devices. Taking the communication system 100 shown in Figure 1 as an example, the communication devices may include a network device 110 and terminal devices 120 having communication functions, and the network device 110 and terminal devices 120 may be the specific devices described above, which will not be repeated here. The communication system 100 may further include other communication devices, such as other network entities such as a network controller or a mobility management entity, and the embodiments of this application are not particularly limited thereto.

[0040] Furthermore, it should be understood that the terms “system” and “network” are often used interchangeably within this specification. In this specification, the term “and / or” is merely a relational relationship used to describe related objects, and means that there may be three possible relationships, for example, A and / or B means that A exists alone, A and B exist simultaneously, or B exists alone. Also, in this specification, the symbol “ / ” generally indicates that the preceding and following related objects are in an “or” relationship. In the description of the embodiments of this application, the term “correspond” may mean that there is a direct or indirect correspondence between two things, or that there is a relational relationship between two things, or that there is a relationship such as instruction and instruction, setting and setting. It should be understood that “instruction” as referred to in the embodiments of this application may mean direct instruction, indirect instruction, or relation. For example, A directing B may mean that A directly directs B, for example, that B can be obtained by A; or it may mean that A indirectly directs B, for example, that if A directs C, B can be obtained by C; or it may mean that there is a relationship between A and B. In the embodiments of this application, “predefined” may be achieved by pre-storing corresponding codes, tables, or other methods that can be used to indicate relevant information in a device (e.g., including terminal devices and network devices). This application does not limit its specific embodiments. For example, pre-configuration may mean configuration defined in a protocol. In the embodiments of this application, “protocol” may mean a standard protocol in the field of communications, which may include, for example, the LTE protocol, the NR protocol, and related protocols applicable to future communication systems, but this application does not limit the type of protocol.

[0041] To facilitate understanding of the technical solution provided in this application, the zero-power device and related technologies are described below.

[0042] (1) Classification of zero-power terminals Based on the energy source and usage method of zero-power terminals, zero-power terminals can be classified into the following types.

[0043] 1. Passive Zero Power Terminal Zero-power devices do not require a built-in battery and, when in proximity to network devices (e.g., readers / writers for radio frequency identification (RFID) systems), are within the range of the near-field formed by the antenna radiation of the network device. Therefore, the antenna of the zero-power device generates an induced current through electromagnetic induction, and this induced current drives the low-power chip circuitry of the zero-power device. This enables operations such as demodulation of forward-link signals (downlink, the link from the network device to the zero-power device) and modulation of signals in the reverse-link (uplink, the link from the zero-power device to the network device). In the case of backscatter links, the zero-power device transmits signals using a backscatter implementation.

[0044] The passive zero-power device does not require an internal battery to drive either the forward or reverse link, demonstrating that it is a truly zero-power device.

[0045] Passive zero-power devices do not require batteries, and their radio frequency and baseband circuits are very simple, eliminating the need for components such as low-noise amplifiers (LNAs), power amplifiers (PAs), crystal oscillators, and analog-to-digital converters (ADCs). As a result, they have many advantages, including being small, lightweight, very inexpensive, and having a long service life.

[0046] Passive zero-power terminals can support other energy collection methods. By collecting energy from the environment (e.g., light energy, thermal energy, kinetic energy, mechanical energy, etc.), they acquire energy to drive circuits and support communication for terminal devices.

[0047] 2. Semi-passive zero-power terminals The semi-passive zero-power device itself does not have a conventional battery, but it can collect radio wave energy using a radio frequency (RF) energy collection module, or collect energy from the environment (e.g., solar energy, thermal energy, mechanical vibration energy, etc.) using an energy collection module. The collected energy is stored in an energy storage unit (e.g., a capacitor). After the energy storage unit acquires the energy, it can drive the low-power consumption chip circuitry of the zero-power device. This enables functions such as demodulation of forward link signals and modulation of reverse link signals. In the case of backscatter links, the zero-power device transmits signals using a backscatter implementation.

[0048] The semi-passive zero-power device does not require an internal battery to drive either the forward or reverse link, and uses capacitive stored energy during operation. However, since this energy originates from radio energy collected by an energy collection module, it is truly a zero-power device.

[0049] Semi-passive zero-power devices inherit many of the advantages of passive zero-power devices, resulting in numerous benefits such as smaller volume, lighter weight, very low cost, and a long service life.

[0050] 3. Active Zero Power Terminals Zero-power devices used in some scenarios may be active zero-power devices, and such terminals can incorporate batteries (conventional batteries, e.g., dry cell batteries, rechargeable lithium batteries, etc.). The battery is used to power the low-power chip circuitry of the zero-power device. This enables functions such as demodulation of forward-link signals and modulation of reverse-link signals. However, in the case of backscatter links, the zero-power device transmits signals using a backscatter implementation. Therefore, the zero power of such terminals is mainly reflected in the fact that reverse-link signal transmission does not require power from the terminal itself and uses a backscatter method. Active zero-power devices use batteries, but because of the extremely low power consumption due to sampling ultra-low power communication technology, the operating life of the battery can be greatly improved compared to conventional technology.

[0051] This is an active zero-power device, where the built-in battery supplies energy to the RFID chip, increasing the tag's read / write distance and improving communication reliability. Therefore, it is suitable for scenarios where relatively high demands are required in terms of communication distance, readout delay, etc.

[0052] Furthermore, even partial zero-power terminals, such as semi-passive zero-power terminals or active zero-power terminals, can have active transmission capabilities; that is, in addition to communication via backscatter, the back link can also communicate through active transmission.

[0053] (2) Cellular Passive IoT As 5G applications increase, the types of connected devices and application scenarios become more diverse, demanding higher prices and power consumption for communication terminals. The application of battery-free, low-cost passive Internet of Things (IoT) devices will become a key technology for cellular IoT, enriching the variety and quantity of 5G network link terminals and realizing a true Internet of Things. Here, passive IoT devices can be extended to be applied to cellular IoT, based on existing zero-power devices.

[0054] (3) Ambient energy-based devices In NR and WiFi systems, the battery-free and low-cost nature of devices can support low-cost, large-scale deployment and maintenance-free operation, such as IoT devices. In NR and WiFi systems, ambient energy-based IoT devices are called Ambient IoT or Ambient Powered IoT (AMP IoT) devices. Ambient IoT refers to IoT devices that utilize various ambient energies, such as radio frequency energy, light energy, solar energy, thermal energy, and mechanical energy. Ambient IoT devices may not have energy storage capabilities, or they may have very limited energy storage capabilities (e.g., using capacitors with a capacitance of tens of microfarads (uF)). This type of device is similar to passive or semi-passive devices in zero-power communications.

[0055] (4) Physical layer protocol data unit (PPDU) in Wi-Fi technology Information from Wi-Fi devices is transmitted based on PPDU frames.

[0056] Figure 2 shows an example of a PPDU according to the embodiment of this application.

[0057] As shown in Figure 2, a PPDU frame includes a physical layer header and a data section. The physical layer header consists of three parts: a Short Training Field (STF), a Long Training Field (LTF), and several specific settings for the data section called SIGNAL. Of these, the STF mainly consists of 10 short symbols (t1~t10), each with a duration of 0.8us. The STF includes many functions, mainly achieving frame synchronization and coarse frequency synchronization. Of these, t1~t7 mainly includes functions such as signal detection, auto gain control (AGC), and diversity selection, while t8~t10 mainly includes functions such as coarse frequency, offset estimation, and timing synchronization. The LTF achieves fine frequency synchronization and channel estimation. The SIGNAL portion carries information about the data section, including data transfer rate, data packet length information, reserved bits, and trailing bits.

[0058] The data portion of PPDU carries MAC frames.

[0059] Figure 3 shows an example of the frame format of a MAC frame according to an embodiment of this application.

[0060] As shown in Figure 3, the frame format of a MAC frame includes a MAC header, a frame body, and a frame check sequence (FCS).

[0061] (5) Unlicensed frequency spectrum Unlicensed frequency spectra are frequency spectra available for radio communication, divided by country and region. Generally, they are considered shared spectra; that is, communication devices in different communication systems can use these spectra without applying for a dedicated spectrum license from the government, provided they meet the regulatory requirements set by the country or region for that spectrum. To ensure that individual communication systems using unlicensed frequency spectra for radio communication can coexist amicably on those spectra, some countries or regions have established regulatory requirements that must be met when using unlicensed frequency spectra. For example, in the European region, communication devices adhere to the "listen-before-talk (LBT)" principle. This means that a communication device must perform channel sensing before transmitting a signal on a channel in the unlicensed frequency spectrum. The device can only transmit a signal if the channel sensing result indicates the channel is idle; if the channel sensing result indicates the channel is busy, the device cannot transmit a signal. Furthermore, to ensure fairness, the duration for which a communication device transmits signals using a channel in the unlicensed frequency spectrum during a single transmission must not exceed the Maximum Channel Occupation Time (MCOT).

[0062] In cellular communication systems, user-standardized unlicensed frequency spectrum technologies, such as 3GPP Rel-16's NR-U technology, allow the use of unlicensed frequency bands below 7 GHz. Subsequent technological advancements may also allow the use of higher frequency bands, such as the 52.6 GHz to 71 GHz range being considered in the Rel-17 standard, along with related technologies. Widely used Wi-Fi technology is also a communication technology that utilizes unlicensed frequency bands.

[0063] (6) Channel access mechanism. In the 802.11 protocol, the basic channel access protocol is the Distributed Coordination Function (DCF), which, through the Carrier Sense Multiple Access with Collision Avoidance (CSMA / CA) mechanism, allows different compatible station (STA) devices to share and use a channel, reducing the probability of collisions.

[0064] DCF primarily involves four core mechanisms.

[0065] 1. Carrier sensing mechanism Carrier sensing mechanisms are divided into physical carrier sensing and virtual carrier sensing, and if the result of either sensing indicates that the channel is busy, then the channel is busy.

[0066] Physical carrier sensing employs three channel idle detection methods: energy detection, carrier detection, and energy-carrier mixed detection, collectively known as CCA. Energy detection determines the magnitude of the energy in the received signal; if the received power is greater than the threshold ED_threshold defined by the physical layer, the channel is considered occupied. Carrier sensing detects the preamble portion of the signal in the channel and determines whether the channel is occupied based on the detection result.

[0067] The virtual carrier sensing mechanism is provided by MAC, and the 802.11 standard uses a Network Allocation Vector (NAV) to implement virtual sensing. The Dur / ID field in the MAC frame stores the "duration". Upon receiving this information, an STA determines how long the channel will be occupied and how much delay is required for its own transmission. The NAV is a timer that defines how much longer the current channel needs to be occupied. Its starting value is the duration of the last received frame, and the countdown ends at 0. Each listening STA uses this NAV timer, and during data communication, the STA occupying the channel informs other STAs how much longer it needs to be occupied by using the duration field in the frame. STAs that have not acquired a channel update their own NAV value by comparing it with the duration value in the received packet. If the NAV value is 0 and physical carrier sensing indicates that the channel is idle, the current channel is considered idle.

[0068] 2. Interframe Space (IFS) Mechanism To avoid collisions as much as possible, 802.11 stipulates that after all stations have completed transmission, they must wait for a very short time (continuing to listen) before transmitting the next frame. This period is collectively called the IFS (Interval Free Time). The length of the IFS depends on the type of frame the station is transmitting. Higher priority frames have a shorter waiting time and can therefore gain the right to transmit preferentially, while lower priority frames must wait for a longer time. If a low-priority frame has not yet been transmitted and other high-priority frames have already been transmitted to the media, the media becomes busy, and therefore the low-priority frame can only be delayed further. This reduces the chance of collisions.

[0069] IFS distinguishes between different priorities for wireless media access, and these priorities are determined by the length of the IFS time, with shorter times indicating higher priority. The intervals between frames, from smallest to largest, are listed below.

[0070] 1. Short interframe space (SIFS) SIFS is the shortest possible interval between frames requiring immediate response, such as control frames (RTS / CTS / ACK). By using the shortest interval between two sequential transmissions during frame exchange, it is possible to prevent other stations waiting for media from attempting to use it.

[0071] 2. Point Coordination function interframe space (PIFS) PIFS is only available for stations operating in Point Coordination Function (PCF) mode.

[0072] 3. Distributed Coordination Function Interframe Space (DIFS) Only stations operating with a Distributed Coordination Function (DCF) model are available.

[0073] 4. Extended Interframe Space (EIFS) If an error occurred in the previous frame, the sending node must delay the next frame by the EIFS period, not the DIFS period.

[0074] 3. Random backoff mechanism. In 802.11, a binary exponential backoff algorithm is used to determine the time required for backoff in the event of a node transmission failure or collision. After there is a frame to transmit to the Media Access Control (MAC) layer and both physical and virtual carrier sensing indicate that the channel is idle, if the backoff window count value is not zero, the count value is continuously decreased in slot time units; otherwise, a single backoff window is randomly generated and backoff is performed. The node selects one random backoff count value based on a random number in the contention window, and once the backoff time is selected, this is equivalent to setting a backoff timer. The contention window value is a parameter value between the minimum contention window (CWmin) and maximum contention window (CWmax) of the physical feature value, and is used to allow the node to select a range for the random backoff counter value. The station continuously listens to the channel within the slot time. When a channel idle is detected, the backoff timer continues to count down by 1. When a channel busy is detected, the remaining time of the backoff timer is frozen, and after waiting for the channel to become idle again, the countdown resumes from the remaining time after DIFS has elapsed. When the backoff timer time reaches zero, transmission of the entire data frame begins.

[0075] 4. RTS / CTS handshake mechanism. IEEE 802.11 RTS / CTS is a Request To Send / Clear To Send (RTS / CTS) protocol, a mechanism for reducing collisions caused by the hidden node problem in the 802.11 protocol. The basic idea of ​​the RTS / CTS mechanism is to reserve a channel with a short control packet. When a transmitting station wants to send a message to a receiving station, it must first send an RTS control frame. After stations around the transmitting station receive this RTS, they set their own Network Assignment Vector (NAV) value based on the duration field. When a receiving station receives an RTS, it replies with a CTS control frame. When stations around the receiving station receive a CTS, they set their own NAV value based on the duration field. Stations with a NAV value other than 0 cannot perform channel idle monitoring to avoid collisions with transmissions between the transmitting and receiving stations.

[0076] Based on the above, zero-power devices can be low in complexity and cost, maintenance-free, battery-free, support energy collection and / or backscatter communication, and enable high-density and large-scale deployment at relatively low cost. Furthermore, the use of unlicensed frequency bands is also an important deployment scenario in cellular communication systems.

[0077] Zero-power terminals require low complexity due to their power consumption limitations. For example, receivers can only support simple modulation / demodulation schemes such as ASK and FSK, and cannot support OFDM. However, when using unlicensed frequency spectrum, to ensure fairness in channel use, if a zero-power terminal needs to occupy a channel for data transmission, it must perform a corresponding CCA to determine whether the channel is idle or not. At the same time, it is necessary to support the CSMA / CA mechanism for compatibility and coexistence with existing equipment. Taking a WiFi system as an example, channel occupancy by a zero-power terminal requires support for the DCF protocol, which requires the zero-power terminal to be able to detect existing PPDU frames transmitted based on OFDM in order to satisfy physical and virtual carrier sensing, as well as support for the RTS / CTS mechanism. However, this is not feasible for zero-power terminals. In light of this, this application provides a wireless communication method that enables zero-power terminals to share channels and communicate with existing equipment when using unlicensed frequency spectrum, thereby reducing collisions and interference. Specifically, different countries and regions have different standards regarding the use of unlicensed frequency spectrum below 1 GHz. Communication technologies used in corresponding frequency bands must meet spectrum usage standards. For example, 802.11ah technology is primarily for IoT devices, uses the sub-1 GHz spectrum, and supports channel bandwidths including 1 MHz, 2 MHz, 4 MHz, 8 MHz, and 16 MHz, where 1 MHz and 2 MHz are the base channel bandwidths. In China, the 920-925 MHz band is for radio frequency identification, and must satisfy the following conditions: channel bandwidth of 250 kHz or less, and channel center frequency fc(MHz) = 920.125 + M × 0.25 (where M is an integer from 0 to 19). The operating mode is hopping, with a maximum dwell time of 2 seconds for each hopping channel. These spectrum usage standards are intended to ensure fairness in spectrum usage among different devices and reduce mutual interference.In a multi-channel access scenario, channel access may involve simultaneous access to multiple channels, and transmission can be performed on the channels after successful channel access. In light of this, the embodiment of this application provides a method for realizing transmission from a zero-power device in the case of multi-channel access.

[0078] Figure 4 is a schematic flowchart of the wireless communication method 200 according to an embodiment of this application, in which the first device and the second device can alternately execute the wireless communication method 200.

[0079] As shown in Figure 4, Method 200 may include the following steps. S210, The first device acquires at least one time-domain resource, including the corresponding target time-domain resource of the second device, in at least one of the multiple channels by channel access to the multiple channels.

[0080] In other words, the first device can acquire time-domain resources in at least one of the multiple channels by channel access to the multiple channels, wherein the at least one time-domain resource includes target time-domain resources reserved for at least the second device, or the at least one time-domain resource includes target time-domain resources allocated for at least the second device.

[0081] For the first device, the first device acquires at least one time-domain resource through channel access. Here, the time-domain resource is also called a transmission opportunity (TXOP), target wake-up time (TWT), service period (SP), access restriction window (RAW), channel occupancy time (COT), or other similar terms acquired by the first device. That is, the at least one time-domain resource may include a period from among TXOP, TWT, SP, RAW, or RAW in the at least one channel.

[0082] Similarly, for the second device, the target time-domain resource is a time-domain resource reserved by the first device for the second device, and is also called a period of TXOP, TWT, SP, RAW, or other similar term used by the second device. That is, the target time-domain resource may include at least one of the periods of TXOP, TWT, SP, RAW, or RAW.

[0083] For example, the time domain resource in question may be a resource that the second device uses to transmit and / or receive information.

[0084] In this embodiment, the first device acquires at least one time-domain resource in at least one of the multiple channels by channel access to the multiple channels, the at least one time-domain resource including a target time-domain resource corresponding to the second device, enabling the second device to perform wireless communication in the unlicensed frequency spectrum and reduce collisions and interference with other devices.

[0085] In some embodiments, the first device may be any device having relay functionality (i.e., both Relay AP and Relay STA functionality). For example, the second device may enable communication between the second device and other devices via the first device. For example, the first device includes, but is not limited to, an AP device or STA in a WiFi system, a base station or UE in a cellular system, an energy supply device, or a control node in a communication network.

[0086] In some embodiments, the first apparatus may be an AP apparatus.

[0087] In some embodiments, the second device is one that does not have channel access capability.

[0088] In this embodiment, the first device performs channel occupancy for a second device that does not have channel access capability, thereby enabling the second device to acquire TXOP or channel occupancy time.

[0089] In some embodiments, the device lacking channel access capability includes a zero-power device.

[0090] From the perspective of power supply methods, zero-power devices can include ambient energy-based devices, such as ambient power-enabled IoT devices (AMP IoT) or ambient IoT devices, battery-free terminals, and maintenance-free terminals. AMP IoT refers to IoT devices that utilize various ambient energies such as radio frequency energy, light energy, solar energy, thermal energy, and mechanical energy. Ambient IoT devices do not need to have energy storage capabilities, or they may have very limited energy storage capabilities (e.g., using capacitors with a capacity of tens of microfarads (uF)). Zero-power devices can function as communication terminals in WiFi or cellular networks.

[0091] In this embodiment, the first device occupies a channel for zero-power devices that lack channel access capabilities, thereby enabling the zero-power devices to acquire transmission opportunities. This method not only ensures compatibility of channel access mechanisms between zero-power devices and existing devices, but also enables zero-power devices to achieve wireless communication in the unlicensed frequency spectrum. At the same time, the first device can provide a relay function for communication between APs and zero-power devices, further improving AP coverage and reducing the impact on existing APs. APs do not need to support a new physical layer air interface and can support communication with zero-power devices through software upgrades, resulting in low deployment costs and ensuring compatibility with existing systems.

[0092] In some embodiments, the second device is associated with the first device, or the second device is a child node device of the first device.

[0093] For example, the second device is associated with the first device, that is, the second device is connected to the higher-level first device, or the first device is connected to the lower-level second device.

[0094] Naturally, in other alternative embodiments, the first apparatus may be connected to other lower-level apparatuses, for example, the apparatus connected to the first apparatus may be a lower-level apparatus of the same type as the second apparatus, or a lower-level apparatus of a different type, and this specification does not particularly limit this.

[0095] For example, if the second device is a child node device of the first device, the first device is also called the parent node device of the second device.

[0096] In some embodiments, the child node device is The devices included in the Basic Service Set (BSS) provided by the first device, and It includes at least one of the devices associated with the first device.

[0097] For example, if the second device is associated with and includes the BSS provided by the first device, then the second device is indicated as the device associated with the first device. In other words, if the second device is associated with the first device, then the second device is associated with and includes the BSS provided by the first device.

[0098] For example, if the second device is associated with and includes the BSS provided by the first device, then the at least one time-domain resource includes the target time-domain resource; that is, if the second device is the device associated with the first device, then the at least one time-domain resource includes the target time-domain resource.

[0099] A BSS is the basic service unit of a wireless network, and a BSS is the basic structure of an 802.11 network, sharing the wireless medium. The BSS provided by the first device may be understood as a service set consisting of multiple devices (e.g., STAs) associated with the first device. In the BSS provided by the first device, the multiple devices associated with the first device are connected to a higher-level first device, and the multiple devices associated with the first device can communicate through the first device or access other devices.

[0100] In some embodiments, S210 may include the following steps. The first device determines a first set of parameters to be used when the first device performs channel access, and then acquires the at least one time-domain resource by channel access to the plurality of channels based on the first set of parameters.

[0101] Since zero-power terminals cannot support existing channel access mechanisms, they need to obtain a TXOP by accessing the channel via a first device providing the service in order to transmit data over a channel. The first device can simultaneously obtain channel access to at least one channel through the channel access mechanism, that is, it can obtain a TXOP on at least one channel. In this embodiment, when the first device obtains channel access for transmission by the zero-power device, a certain channel access priority can be guaranteed by setting certain parameters. During the execution of multi-channel access, the results of the first device performing CCA across multiple channels may differ, so the set of channels from which a TXOP was successfully obtained may differ from the set of channels from which the first device performed CCA; for example, the former may be a subset of the latter.

[0102] In some embodiments, the multiple channels include a primary channel and at least one secondary channel, and the first parameter set is: This includes at least one of the following: the contention window (CW) parameter of the primary channel, the idle duration of the primary channel, and the idle duration of the secondary channel.

[0103] Under an enhanced distributed channel access (EDCA) mechanism, different access categories (ACs) can be assigned to different traffic types, and each AC can correspond to a different set of EDCA parameters to satisfy different AC priorities. EDCA parameters include latency and CW parameters. Latency may include DIFS, PIFS, etc., and CW parameters may include CWmin and CWmax. Referring to the solution of this application, in the case of multi-channel access, specific EDCA parameters can be defined for the access category. For example, in a first device, the channels performing channel access may include one primary channel and several secondary channels, thereby further defining the CW parameters of the primary channel, the latency of the primary channel, and the latency of the secondary channels.

[0104] In some embodiments, the first device acquires the at least one time-domain resource by channel access to the plurality of channels based on the first parameter set, The steps include performing channel sensing on the primary channel, If the primary channel is idle, the step of determining that the at least one time-domain resource includes a time-domain resource in the primary channel, The steps include performing channel sensing on the secondary channel during the waiting time of the secondary channel prior to the start time of the time-domain resource in the primary channel, The method includes the step of determining that, if the secondary channel is idle, the at least one time-domain resource includes a time-domain resource in the secondary channel.

[0105] For example, if the first device performs EDCA channel access on the primary channel and performs CCA on the secondary channel within one latency before the start of the acquired TXOP, and the result is idle, then the TXOP obtained by the first device includes the TXOP on the secondary channel.

[0106] Figure 5 shows an example of a channel access procedure according to an embodiment of this application.

[0107] As shown in Figure 5, if the first device is designated as the AP, the AP performs channel access on primary channel #0, and during a latency 2 before the start of the acquired TXOP, it performs a CCA on secondary channels #1-3. If the channels are idle, the first device acquires the TXOP on channels #0-3. For the other STAs, the corresponding channels are busy while the first device acquires the TXOP. For example, latency 1 = DIFS and latency 2 = PIFS. The EDCA parameters corresponding to this multi-channel access category include not only latency 1 and CW parameters for channel access on the primary channel, but also latency 2 for channel access on the secondary channels.

[0108] In some embodiments, the first device performs channel access based on the respective parameter sets of multiple channels.

[0109] In this embodiment, the first device can perform independent channel access on the corresponding channel using the parameter set of each of the multiple channels, and the parameter sets of the multiple channels may be the same or different. In other words, the first device can perform independent EDCA on each channel in a single channel set, and the AC corresponding to the EDCA of each channel may be the same or different.

[0110] This application does not limit the channel access mechanism when the first device performs multi-channel access, and the mechanism described above is merely one example. The first device may further have channel access mechanisms for other channel access. For example, when the first channel performs channel access to multiple channels, some channels (one or more channels) may use a shared parameter set, while other channels (one or more channels) may use an independent parameter set.

[0111] After the first device acquires channel access to multiple channels, to avoid being affected by collisions caused by channel access from a third-party device during the TXOP period, the first device may send a NAV-setting frame after acquiring the TXOP. Sending this type of frame allows the third-party STA to set the NAV, and the third-party STA will not attempt a CCA before the NAV is reset to zero, thereby protecting the TXOP. Specifically, the NAV-setting frame may be an RTS or CTS frame, or any other type of frame. A duration field included in the NAV-setting frame may be used to reserve the channel occupancy time of the channels required for communication by the zero-power consumption device.

[0112] Figure 6 shows another example of a channel access procedure according to an embodiment of this application.

[0113] As shown in Figure 6, if the first device is an AP, after the AP acquires TXOPs for four channels, the first device can transmit RTSs on each of the four channels and have the corresponding NAVs set to the third-party STA. During the TXOP period, the STA determines that the status of the four channels is busy, i.e., it does not attempt to perform a CCA.

[0114] In some embodiments, the method 200 may further include the following steps: S220, the first device transmits a first signal to the second device, the information carried by the first signal including first information, the first information being for indicating that the at least one time-domain resource includes the target time-domain resource, or the first information being for indicating the target time-domain resource.

[0115] The first device, after acquiring a TXOP on at least one channel, needs to transmit first information to the zero-power device so that the zero-power device can determine, based on the first information, the TXOP belonging to it (i.e., the target time-domain resource referred to above), which belongs to one of the at least one channels, and the TXOP corresponding to the zero-power device is a period in the TXOP acquired by the first device (i.e., the at least one time-domain resource referred to above), and this period is the TXOP corresponding to the zero-power device, which may also be called other similar terms such as SP or TWT corresponding to the zero-power device. Specifically, the first device transmits a first signal to the zero-power device via a first channel, the first signal carrying the first information, where the first channel is one of a plurality of channels acquired by the first device through channel access, for example, the primary channel. The first information enables the zero-power device to determine a channel for transmission and target period or time window information, such as a TXOP, SP, or TWT, for transmission on that channel.

[0116] In some embodiments, if the at least one time-domain resource is divided to include a plurality of resource units, the target time-domain resource includes at least one resource unit from the plurality of resource units.

[0117] In this embodiment, when the first device divides the at least one time-domain resource into multiple resource units and allows multiple zero-power devices to share and use the TXOP of multiple acquired signals, different resource units can be used for transmissions from different zero-power devices, thereby avoiding collisions and interference between transmissions from different zero-power devices. This corresponds to the first device being able to occupy a channel for zero-power devices that do not have channel access capabilities by performing channel access to the multi-channel, thereby providing the zero-power devices with transmission opportunities. Furthermore, by introducing the first information, it is made easier for zero-power devices to determine the resource units for transmission in the multi-channel TXOP, enabling multiple zero-power devices to share and use the multi-channel TXOP, and also improving transmission efficiency. At the same time, this method ensures compatibility with the channel access mechanisms of existing devices and enables communication of zero-power terminals.

[0118] In some embodiments, the first information is for indicating the at least one resource unit.

[0119] In other words, the first information can directly indicate resource units included in the target time-domain resource corresponding to the second device, that is, the first information can directly indicate resource units used by the second device.

[0120] In some embodiments, the first information is intended to indicate the device corresponding to each of the plurality of resource units.

[0121] For example, if the first information is for indicating a device corresponding to each of the multiple resource units, the first device can transmit the first information to each device that can use the multiple resource units.

[0122] In some embodiments, the first bit in the first information is for indicating whether a resource unit corresponding to a device other than the first device includes a resource unit among the plurality of resource units associated with the first bit.

[0123] For example, devices other than the first device may include one or more zero-power devices from among a plurality of zero-power devices associated with the first device. For example, the first information may indicate whether one or more zero-power devices from among a plurality of zero-power devices associated with the first device perform transmission within a TXOP (e.g., including a plurality of resource units), and a target zero-power device indicated as capable of transmission can determine the location of the target resource unit in the TXOP after receiving the first information, according to a predetermined rule. For example, the target zero-power device can calculate the location of the target resource unit among a plurality of resource units included in the TXOP based on the ID of the target zero-power device. For example, the target zero-power device can perform a modulo operation on the ID of the target zero-power device to determine the location of the target resource unit among a plurality of resource units included in the TXOP.

[0124] For example, devices other than the first device may include all zero-power devices associated with the first device. For instance, the first information may indicate whether all zero-power devices associated with the first device can perform transmission within each resource unit in a TXOP (e.g., including multiple resource units), which is equivalent to the first information indicating whether one or more resource units out of N resource units are available for transmission. After receiving the first information, the target zero-power device can determine the location of the target resource unit from one or more resource units indicated as available for transmission, according to a predetermined rule. For example, the target zero-power device may calculate the location of the target resource unit among multiple resource units included in the TXOP based on the ID of the target zero-power device. For example, the target zero-power device may perform a modulo operation on the ID of the target zero-power device to determine the location of the target resource unit among multiple resource units included in the TXOP.

[0125] In this embodiment, the first bit in the first information indicates whether a resource unit corresponding to a device other than the first device includes a resource unit associated with the first bit among the plurality of resource units. This means that the first information can indicate which resource units among the plurality of resource units can be transmitted by devices other than the first device. This not only enables devices other than the first device to share and use resource units in a multi-channel environment, but also improves transmission efficiency.

[0126] In some embodiments, the first bit in the first information is for indicating whether the resource corresponding to the device associated with the first bit includes the resource unit associated with the first bit among the plurality of resource units.

[0127] For example, the first information may directly indicate the duration and channels of one or more zero-power devices. For instance, the TXOPs of multiple channels acquired by the first device may be divided into N resource units according to certain rules or parameters instructed by the first device, with each resource unit containing a time unit in one channel. The first information may include a bitmap in which each bit corresponds to one or more of the multiple zero-power devices associated with the first device and is also associated with one or more of the N resource units. Thus, the first information can indicate the resource units and channels of one or more zero-power devices.

[0128] Figure 7 shows an example of a resource unit according to an embodiment of this application.

[0129] As shown in Figure 7, if the first device is an AP, the AP acquires TXOPs for four channels, and the TXOPs in each channel are equally divided among six resource units. In this case, the AP can represent first information, for example, this first information is a bitmap, and the bits in the bitmap can correspond to resource units, or to zero-power devices, or to both resource units and zero-power devices. For example, the bits in the bitmap can correspond to both resource units and zero-power devices, and when a bit is set to 1, the corresponding zero-power device performs transmission on the corresponding resource unit.

[0130] In some embodiments, the first information described above is The identifier of the device that has access to at least one time-domain resource, and The identifier includes at least one of the device group identifiers that make the aforementioned at least one time-domain resource available.

[0131] For example, if the first information is for indicating that the at least one time-domain resource includes the target time-domain resource, and the first information includes an identifier for a device that can use the at least one time-domain resource, then the identifier for the device that can use the at least one time-domain resource includes an identifier for the second device.

[0132] For example, if the first information is for indicating that the at least one time-domain resource includes the target time-domain resource, and the first information includes an identifier for a device group that can use the at least one time-domain resource, then the identifier for the device group that can use the at least one time-domain resource includes an identifier for the device group to which the second device belongs.

[0133] For example, if the first information includes an identifier for a device that can use the at least one time-domain resource, or if the first information includes an identifier for a group of devices that can use the at least one time-domain resource, the second device can determine the target time-domain resource according to a predetermined rule. For example, assuming the second device is a target zero-power device, the target zero-power device can calculate the location of its target resource unit among a plurality of resource units based on the ID of the target zero-power device. For example, the target zero-power device can perform a modulo operation on the ID of the target zero-power device to determine the location of its target resource unit among a plurality of resource units. Here, the plurality of resource units may be resource units at predetermined locations among the resource units included in the at least one time-domain resource. For example, the plurality of resource units may be the first K, the last K, or the intermediate K consecutive resource units among the resource units included in the at least one time-domain resource, where K is a positive integer, or K may be determined based on the first information. For example, K is positively correlated with the number of identifiers for devices that can use the at least one time-domain resource, or K is positively correlated with the number of identifiers for a group of devices that can use the at least one time-domain resource.

[0134] Furthermore, this application does not limit the specific embodiments of the information described in the first paragraph.

[0135] For example, the first information is TXOP information, such as the duration and / or end time of the TXOP (for example, at least one of the time-domain resources or target time-domain resources mentioned above), A device ID or device group ID indicating a zero-power device or device group that uses a TXOP (for example, at least one of the time-domain resources or target time-domain resources mentioned above), For example, the Service Period parameter indicates the available period or time window information of a zero-power device in a TXOP (e.g., at least one of the time-domain resources or target time-domain resources mentioned above), such as the service period (SP). Grant information for assigning the TXOP or service period to the zero-power device, and It may contain at least one of the trigger pieces of information for starting a single SP.

[0136] In some embodiments, the information carried by the first signal is Information to indicate the at least one channel, Information for indicating the at least one time-domain resource, Information for partitioning the at least one time-domain resource, and It further includes at least one identifier of the first device.

[0137] For example, the information for indicating the at least one channel may be an index of the at least one channel, or it may be a frequency band or frequency point in which the at least one channel is located.

[0138] For example, the information for indicating the at least one time-domain resource may include the division information for each of the at least one time-domain resource, and if the at least one time-domain resource is a plurality of time-domain resources, the division information for the plurality of time-domain resources may be the same, partially the same, or different from each other, and this application is not particularly limited thereto. The division information for the resource unit may include at least one of the number of divisions of the resource unit, the position of each resource unit, the length of each resource unit, the start position of each resource unit, or the end position of each resource unit. For example, as shown in Figure 7, the at least one time-domain resource is four time-domain resources, and each of these four time-domain resources is equally divided into six resource units, and the division information for these four time-domain resources (e.g., the number of divisions of the resource unit) is the same, i.e., six.

[0139] Naturally, in other alternative embodiments, the information carried by the first signal may include any information that can be transmitted from AP to STA.

[0140] For example, the information sent from AP to STA includes, but is not limited to, the following: Beacon information including parameters and / or settings related to ZP BSS, Information to identify the first device, such as the BSS ID, compressed SSID, or STA ID. Response (ACK) information for the second device (e.g., zero-power device) in response to transmission, Paging information to indicate that the first device needs to transmit cached data from the second device (e.g., a zero-power device), Data transmitted by the first device to the zero-power device. For example, synchronization information for time synchronization of a second device (e.g., a zero-power device), such as Timing Synchronization Function (TSF) information, and Traffic indication map (TIM) information for indicating a second device (e.g., a zero-power device) that has data cached in the first device.

[0141] In some embodiments, the first device transmits the first signal to the second device via a physical layer air interface associated with the second device.

[0142] For example, the physical layer air interface associated with the second device may be a physical layer air interface related to zero-power communication, and its modulation scheme may employ a simple modulation / demodulation scheme such as ASK or FSK, and its coding may employ a simple coding scheme such as iterative coding, Manchester coding, block coding, or packet coding.

[0143] Naturally, in other alternative embodiments, the first device may also include other physical layer air interfaces. For example, the first device may also include a physical layer air interface related to AP or STA communication. For example, the physical layer air interface related to AP or STA communication may employ OFDM modulation as its modulation scheme and FEC coding as its encoding scheme. In other words, the first device can communicate with zero-power devices via a physical layer air interface related to zero-power communication and can communicate with APs, STAs, and other relay nodes via a physical layer air interface related to AP or STA communication.

[0144] In some embodiments, the channel on which the target time-domain resource resides is the same as or different from the channel used to carry the first signal.

[0145] For example, a second device determines a target time-domain resource for transmission based on first information carried by a first signal, and if the target time-domain resource is a target resource unit, the second channel corresponding to the target resource unit may be different from the first channel that receives the first signal.

[0146] In some embodiments, the first signal is an energy supply signal that supplies energy to the second device, or the first signal is a carrier signal for backscattering by the second device, or the first signal includes a carrier signal for backscattering by the second device.

[0147] For example, the first signal is an energy supply signal for supplying energy to the second device, and also a carrier signal for backscattering by the second device. Alternatively, the first signal is an energy supply signal for supplying energy to the second device, and also includes a carrier signal for backscattering by the second device.

[0148] For example, a zero-power terminal can perform backscatter communication based on a received trigger signal.

[0149] For example, the trigger signal may be used to schedule or trigger backscatter communication of a zero-power terminal. The trigger signal carries scheduling information from a network device, or the trigger signal is a scheduling signaling or scheduling signal transmitted from the network device.

[0150] The energy supply signal and the trigger signal may be a single signal or two independent signals, but this application does not particularly limit them.

[0151] For example, in a cellular network, since zero-power devices do not have battery power, network devices need to supply an energy supply signal so that the zero-power devices can acquire energy and perform the corresponding communication processes. Here, the energy supply signal (i.e., energy supply signal) and the information transmission signal (i.e., trigger signal) may be two signals or one signal. Also, for example, in RFID technology, the energy supply signal and the trigger signal may be one signal, and in cellular passive IoT technology, the energy supply signal and the trigger signal may be two independent signals. These two signals do not have to be transmitted in the same frequency band. For example, a network device may continuously or intermittently transmit an energy supply signal in a certain frequency band, and the zero-power device may collect energy and, after acquiring energy, perform the corresponding communication processes such as measurement, channel / signal reception, and channel / signal transmission.

[0152] In some embodiments, the method 200 may further include the following steps: The second signal transmitted from the second device is received.

[0153] In some embodiments, the first device receives the second signal transmitted from the second device via a physical layer air interface associated with the second device.

[0154] In some embodiments, the information carried by the second signal is Response ACK information, Trigger information for triggering the SP of the second device, Polling information, It must contain at least one of the data.

[0155] For example, acknowledgment (ACK) information is used to respond to a transmission from the first device, and the acknowledgment information may be a grant acknowledgment (Grant Ack). Data may be data transmitted from the second device to the first device. Polling information is used to request the first device to send cached data.

[0156] It should be noted that the second signal may be transmitted not only to the first device but also to other devices that communicate with the first device, such as other zero-power devices or other relay devices. In this case, the first device is not a device that communicates with the second device, but merely a device that obtains a TXOP for the second device. In this case, the second signal may carry address information of a receiving device to indicate the ID of the device that receives the second signal.

[0157] While preferred embodiments of this application have been described in detail above with reference to the attached drawings, this application is not limited to the specific details of the embodiments mentioned above. Within the scope of the technical idea of ​​this application, various simple modifications can be made to the technical solutions of this application, and these simple modifications are included within the scope of protection of this application. For example, the individual specific technical features described in the specific embodiments mentioned above can be combined by any suitable means, as long as they do not contradict each other, and various possible combinations are not described separately in this application in order to avoid unnecessary repetition. Furthermore, various different embodiments of this application can be combined in any way, as long as they do not contradict the idea of ​​this application, and should similarly be considered as part of the disclosures of this application.

[0158] Furthermore, in the various embodiments of the methods of this application, the magnitude of the process numbers mentioned above does not indicate the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation processes of the embodiments of this application.

[0159] The embodiments of the method of this application have been described in detail above with reference to Figures 1 to 7. The embodiments of the apparatus of this application will now be described in detail below with reference to Figures 8 to 11.

[0160] Figure 8 is a schematic block diagram of the first apparatus 300 of the embodiment of this application.

[0161] As shown in Figure 8, the first apparatus 300 is The system may include a communication unit 310 for obtaining at least one time-domain resource, including a target time-domain resource corresponding to a second device, in at least one of the multiple channels, through channel access to multiple channels.

[0162] In some embodiments, the second device is associated with the first device, or the second device is a child node device of the first device.

[0163] In some embodiments, the communication unit 310 further... This is for transmitting the first signal to the second device, The information carried by the first signal includes first information, the first information being for indicating that the at least one time-domain resource includes the target time-domain resource, or the first information being for indicating the target time-domain resource.

[0164] In some embodiments, if the at least one time-domain resource is divided to include a plurality of resource units, the target time-domain resource includes at least one resource unit from the plurality of resource units.

[0165] In some embodiments, the first information is for indicating at least one resource unit, and / or the first information is for indicating the device corresponding to each of the plurality of resource units.

[0166] In some embodiments, the first bit in the first information indicates whether a resource unit corresponding to a device other than the first device includes a resource unit among the plurality of resource units associated with the first bit, or the first bit indicates whether a resource unit corresponding to a device associated with the first bit includes a resource unit among the plurality of resource units associated with the first bit.

[0167] In some embodiments, the first information described above is The identifier of the device that has access to at least one time-domain resource, and The identifier of the device group that has the at least one time-domain resource available includes at least one of the identifiers of the device group.

[0168] In some embodiments, the information carried by the first signal is Information to indicate the at least one channel, Information for indicating the at least one time-domain resource, Information for partitioning the at least one time-domain resource, and It further includes at least one identifier of the first device.

[0169] In some embodiments, the communication unit 310 is specifically, This is for transmitting the first signal to the second device via a physical layer air interface associated with the second device.

[0170] In some embodiments, the channel on which the target time-domain resource resides is the same as or different from the channel used to carry the first signal.

[0171] In some embodiments, the first signal is an energy supply signal that supplies energy to the second device, or the first signal is a carrier signal for backscattering by the second device, or the first signal includes a carrier signal for backscattering by the second device.

[0172] In some embodiments, the communication unit 310 further... This is for receiving a second signal transmitted from the second device.

[0173] In some embodiments, the communication unit 310 is specifically, This is for receiving the second signal transmitted from the second device via a physical layer air interface associated with the second device.

[0174] In some embodiments, the information carried by the second signal is Response ACK information, Trigger information for triggering the SP of the second device, Polling information, and It must contain at least one of the data.

[0175] In some embodiments, the communication unit 310 is specifically, Determine the first set of parameters that the first device uses when performing channel access. Based on the first set of parameters, this is for obtaining the at least one time-domain resource by channel access to the multiple channels.

[0176] In some embodiments, the plurality of channels include a primary channel and at least one secondary channel, and the first parameter set is This includes at least one of the following: the contention window CW parameter of the primary channel, the latency of the primary channel, and the latency of the secondary channel.

[0177] In some embodiments, the communication unit 310 is specifically, Channel sensing is performed on the primary channel, If the primary channel is idle, it is determined that the at least one time-domain resource includes a time-domain resource in the primary channel. During the waiting time of the secondary channel prior to the start time of the time-domain resource in the primary channel, channel sensing is performed on the secondary channel. If the secondary channel is idle, this is for determining that the at least one time-domain resource includes a time-domain resource in the secondary channel.

[0178] In some embodiments, the communication unit 310 is specifically, This is for accessing channels based on the parameter sets of each of the aforementioned multiple channels.

[0179] In some embodiments, the second device is one that does not have channel access capability.

[0180] In some embodiments, the second device is a zero-power device.

[0181] In some embodiments, the first device is an access point device or a relay device.

[0182] It should be understood that the embodiments of the apparatus can correspond to the embodiments of the method, and similar descriptions can refer to the embodiments of the method. Specifically, the first apparatus 300 shown in Figure 8 can correspond to the execution body of method 200 according to embodiments of this application, and the aforementioned and other operations and / or functions of each unit in the first apparatus 300 are for realizing the corresponding flows in each method according to embodiments of this application, respectively, and for the sake of brevity, their description is omitted here.

[0183] Figure 9 is a schematic block diagram of the second apparatus 400 of the embodiment of this application.

[0184] As shown in Figure 9, the second apparatus 400 is It may include a communication unit 410 for receiving a first signal transmitted from a first device. The information carried by the first signal includes first information, which is intended to indicate that at least one time-domain resource acquired by the first device through channel access to a plurality of channels, on at least one of the plurality of channels, includes a target time-domain resource corresponding to the second device, or the first information is intended to indicate the target time-domain resource.

[0185] In some embodiments, the second device is associated with the first device, or the second device is a child node device of the first device.

[0186] In some embodiments, if the at least one time-domain resource is divided to include a plurality of resource units, the target time-domain resource includes at least one resource unit from the plurality of resource units.

[0187] In some embodiments, the first information is for indicating at least one resource unit, and / or the first information is for indicating the device corresponding to each of the plurality of resource units.

[0188] In some embodiments, the first bit in the first information indicates whether a resource unit corresponding to a device other than the first device includes a resource unit among the plurality of resource units associated with the first bit, or the first bit indicates whether a resource unit corresponding to a device associated with the first bit includes a resource unit among the plurality of resource units associated with the first bit.

[0189] In some embodiments, the first information described above is The identifier of the device that has access to at least one time-domain resource, and The identifier of the device group that has the at least one time-domain resource available includes at least one of the identifiers of the device group.

[0190] In some embodiments, the information carried by the first signal is Information to indicate the at least one channel, Information for indicating the at least one time-domain resource, Information for partitioning the at least one time-domain resource, and It further includes at least one identifier of the first device.

[0191] In some embodiments, the channel on which the target time-domain resource resides is the same as or different from the channel used to carry the first signal.

[0192] In some embodiments, the first signal is an energy supply signal that supplies energy to the second device, or the first signal is a carrier signal for backscattering by the second device, or the first signal includes a carrier signal for backscattering by the second device.

[0193] In some embodiments, the communication unit 410 further includes This is for transmitting a second signal to the first device.

[0194] In some embodiments, the information carried by the second signal is Response ACK information, Trigger information for triggering the SP of the second device, Polling information, and It must contain at least one of the data.

[0195] In some embodiments, the second device is one that does not have channel access capability.

[0196] In some embodiments, the second device is a zero-power device.

[0197] In some embodiments, the first device is an access point device or a relay device.

[0198] It should be understood that the embodiments of the apparatus can correspond to the embodiments of the method, and similar descriptions can refer to the embodiments of the method. Specifically, the second apparatus 400 shown in Figure 9 can correspond to the execution body of method 200 according to an embodiment of this application, and the aforementioned and other operations and / or functions of each unit in the second apparatus 400 are for realizing the corresponding flows in each method according to an embodiment of this application, respectively, and for the sake of brevity, their description is omitted here.

[0199] The communication device according to the embodiments of this application has been described above with reference to the drawings from the perspective of a functional module. It should be understood that this functional module may be implemented in hardware form, by software instructions, or by a combination of hardware and software modules. Specifically, each step of the embodiment of the method in the embodiments of this application may be executed by hardware integrated logic circuits and / or software instructions in a processor, and the steps of the method disclosed in the embodiments of this application may be directly implemented either by a hardware decoding processor or by a combination of hardware and software modules in a decoding processor. Alternatively, the software module may be located in a storage medium that is mature in the art, such as random access memory, flash memory, read-only memory, programmable read-only memory, electrically erasable programmable memory, or registers. The storage medium is located in memory, and the processor reads information in memory and executes the steps of the embodiment of the method described above together with its hardware.

[0200] For example, the communication unit described above may be implemented using a transceiver.

[0201] Figure 10 is a schematic diagram of the communication device 500 according to an embodiment of this application.

[0202] As shown in Figure 10, the communication device 500 may include a processor 510. The processor 510 can call and execute a computer program from memory in order to implement the method in the embodiment of this application.

[0203] As shown in Figure 10, the communication device 500 may further include a memory 520. The memory 520 may be used to store information, and may also be used to store code, instructions, etc., executed by the processor 510. The processor 510 can call and execute a computer program from the memory 520 to implement the method in the embodiment of this application. The memory 520 may be a separate device independent of the processor 510, or it may be integrated into the processor 510.

[0204] As shown in Figure 10, the communication device 500 may further include a transceiver 530. The processor 510 can control the transceiver 530 to communicate with other devices, specifically, to transmit information or data to other devices or to receive information or data transmitted from other devices. The transceiver 530 may include a transmitter and a receiver. The transceiver 530 may further include an antenna, which may be one or more.

[0205] It should be understood that each component of the communication device 500 is connected by a bus system, which includes a power bus, a control bus, and a status signal bus in addition to a data bus. The communication device 500 may be the first or second device according to the embodiments of this application, and it should also be understood that it can implement the corresponding flows implemented by the first or second device in various ways according to the embodiments of this application.

[0206] Furthermore, in the embodiments of this application, a chip is provided. For example, the chip may be an integrated circuit chip having signal processing capabilities that can implement or perform each of the methods, steps, and logic block diagrams disclosed in the embodiments of this application. Such a chip is also called a system-level chip, system chip, chip system, or system-on-a-chip. Alternatively, the chip can be applied to various communication devices so that the communication device incorporating the chip can perform each of the methods, steps, and logic block diagrams disclosed in the embodiments of this application.

[0207] Figure 11 is a schematic diagram of the chip 600 according to an embodiment of this application.

[0208] As shown in Figure 11, the chip 600 includes a processor 610. The processor 610 can call and execute a computer program from memory in order to implement the method in the embodiment of this application.

[0209] As shown in Figure 11, the chip 600 may further include a memory 620. The processor 610 can call and execute a computer program from the memory 620 to implement the method in the embodiment of this application. The memory 620 may be used to store instruction information, or it may be used to store code, instructions, etc., to be executed by the processor 610. The memory 620 may be a separate device independent of the processor 610, or it may be integrated into the processor 610.

[0210] As shown in Figure 11, the chip 600 may further include an input interface 630. The processor 610 can control the input interface 630 to communicate with other devices or chips, specifically, it can acquire information or data transmitted from other devices or chips.

[0211] As shown in Figure 11, the chip 600 may further include an output interface 640. The processor 610 can control the output interface 640 to communicate with other devices or chips, specifically by outputting information or data to other devices or chips.

[0212] It should be understood that each component in the chip 600 is connected by a bus system, which includes a power bus, a control bus, and a status signal bus, in addition to a data bus. It should also be understood that the chip 600 can be applied to a first or second apparatus according to embodiments of this application, and that the chip can implement the corresponding flows implemented by the first or second apparatus in various ways according to embodiments of this application.

[0213] The processors described above may include, but are not limited to, general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs) or other programmable logic devices, discrete element gates or transistor logic devices, discrete hardware components, and the like.

[0214] The aforementioned processor may be used to implement or execute each of the methods, steps, and logic block diagrams disclosed in the embodiments of this application. The steps of the methods disclosed in the embodiments of this application may be directly embodied either by a hardware decoding processor or by a combination of hardware and software modules within the decoding processor. The software modules may be located in a storage medium that is mature in the art, such as random access memory, flash memory, read-only memory, programmable read-only memory, or erasable programmable memory, or registers. The storage medium is located in memory, and the processor reads information in memory and completes the steps of the methods described above together with its hardware.

[0215] The above-mentioned memory includes, but is not limited to, volatile memory and / or non-volatile memory. Here, non-volatile memory may be read-only memory (ROM), programmable read-only memory (PROM), erasable programmable read-only memory (Erasable PROM, EPROM), electrically erasable programmable read-only memory (Electrically Erasable EPROM, EEPROM), or flash memory. Volatile memory may be random-access memory (RAM) used as an external cache. Many forms of RAM are available, including, but not limited to, static random access memory (Static RAM, SRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (Synchronous DRAM, SDRAM), double data rate synchronous dynamic random access memory (Double Data Rate SDRAM, DDRSDRAM), enhanced synchronous dynamic random access memory (Enhanced SDRAM, ESDRAM), synchronous link dynamic random access memory (Synch link DRAM, SLDRAM), and direct rambus random access memory (Direct Rambus RAM, DRRAM).

[0216] It should be noted that the memories described herein are intended to include these and any other suitable types of memory.

[0217] Embodiments of this application further provide a computer-readable storage medium for storing computer programs. The computer-readable storage medium stores one or more programs, which, when executed by a portable electronic device including a plurality of application programs, cause the portable electronic device to execute the wireless communication method according to this application. The computer-readable storage medium can be applied to a first device according to embodiments of this application, and the computer program causes a computer to execute a corresponding flow implemented by the first device in various ways according to embodiments of this application. The computer-readable storage medium can be applied to a second device according to embodiments of this application, and the computer program causes a computer to execute a corresponding flow implemented by the second device in various ways according to embodiments of this application.

[0218] Embodiments of this application further provide a computer program product including a computer program. The computer program product can be applied to a first apparatus according to embodiments of this application, and the computer program causes a computer to execute a corresponding flow realized by the first apparatus in various ways according to embodiments of this application. The computer program product can be applied to a second apparatus according to embodiments of this application, and the computer program causes a computer to execute a corresponding flow realized by the second apparatus in various ways according to embodiments of this application.

[0219] Embodiments of this application further provide a computer program that, when executed by a computer, can cause the computer to execute the wireless communication method according to this application. The computer program can be applied to a first device according to an embodiment of this application, and when the computer program is executed on the computer, it can cause the computer to execute the corresponding flow implemented by the first device in various ways according to an embodiment of this application. The computer program can be applied to a second device according to an embodiment of this application, and when the computer program is executed on the computer, it can cause the computer to execute the corresponding flow implemented by the second device in various ways according to an embodiment of this application.

[0220] This application further provides a communication system that may include the first and second devices mentioned above, which will not be repeated here for the sake of brevity. The terms "system" and similar terms used herein may also be referred to as "network management architecture" or "network system," etc.

[0221] It should be noted that the terms used in the embodiments and appended claims of this application are for the sole purpose of describing specific embodiments and are not intended to limit the embodiments of this application. For example, the singular forms “one,” “the said,” “above,” and “the” used in the embodiments and appended claims of this application are also intended to include the plural form unless the context clearly indicates otherwise.

[0222] Those skilled in the art will understand that each exemplary unit and algorithmic step described in relation to the embodiments disclosed herein can be implemented in electronic hardware or in combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the invention. Those skilled in the art may use different methods for each specific application to implement the described functions, but such implementations should not be considered departures from the scope of this application. When implemented in the form of software function units and sold or used as independent products, they can be stored on computer-readable storage media. Based on this understanding, the technical solutions of the embodiments of this application may be embodied in the form of a software product stored on a storage medium, in which the portion of the technical solution essentially, i.e., the portion that contributes to the prior art, or the portion of the technical solution, includes several instructions for causing a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the embodiments of this application. The aforementioned storage media also include various media capable of storing program code, such as U disks, removable hard disks, read-only memory, random access memory, magnetic disks, or optical disks.

[0223] Those skilled in the art will understand that, for the sake of convenience and brevity of explanation, the specific operating procedures of the systems, apparatus, and units described above can be found by referring to the corresponding procedures in the embodiments of the methods described above, and are therefore omitted here. It should be understood that in some embodiments of this application, the disclosed systems, apparatus, and methods may be implemented in other ways. For example, the division of units, modules, or components in the embodiments of the apparatus described above is only one logical functional division, and other division methods may exist in practice. For example, multiple units, modules, or components may be incorporated into or integrated into another system, or some units, modules, or components may be ignored or not performed. Also, for example, the units / modules / components described above as separation / display means may or may not be physically separated; that is, they may be located in one place or distributed across multiple network units. Some or all of the units / modules / components can be selected as needed to achieve the objectives of the embodiments of this application. Finally, the aforementioned mutual coupling, direct coupling, or communication connection may also be an indirect coupling or communication connection via some interface, device, or unit, and may be in an electrical, mechanical, or other form.

[0224] Although only specific embodiments of the embodiments of this application have been described above, the scope of protection of the embodiments of this application is not limited thereto. Modifications and substitutions that a person skilled in the art could easily conceive of within the technical scope disclosed in the embodiments of this application are included within the scope of protection of the embodiments of this application. Therefore, the scope of protection of the embodiments of this application shall be subject to the claims.

Claims

1. A wireless communication method applicable to the first device, The method is characterized by including the step of obtaining at least one time-domain resource, which includes a target time-domain resource corresponding to a second device, in at least one of the multiple channels by channel access to multiple channels. method.

2. The second device is characterized in that it is associated with the first device, or the second device is a child node device of the first device. The method according to claim 1.

3. The further step includes transmitting a first signal to the second device, The information carried by the first signal includes first information, wherein the first information is for indicating that the at least one time-domain resource includes the target time-domain resource, or the first information is for indicating the target time-domain resource. The method according to claim 1 or 2.

4. When the at least one time domain resource is divided to include a plurality of resource units, the target time domain resource is characterized in that it includes at least one resource unit from the plurality of resource units. The method according to claim 3.

5. The first information is for indicating at least one resource unit, and / or the first information is for indicating a device corresponding to each of the plurality of resource units, The method according to claim 4.

6. The first bit in the first information is for indicating whether a resource unit corresponding to a device other than the first device includes a resource unit among the plurality of resource units associated with the first bit, or the first bit is for indicating whether a resource unit corresponding to a device associated with the first bit includes a resource unit among the plurality of resource units associated with the first bit. The method according to claim 4.

7. The first information mentioned above is, The identifier of the device that can utilize at least one time-domain resource, and The identifiers include at least one of the identifiers of the device group that can utilize the aforementioned at least one time-domain resource, The method according to claim 3.

8. The information carried by the first signal is: Information for indicating at least one channel, Information for indicating the at least one time-domain resource, Information for partitioning the at least one time-domain resource, and The invention further includes at least one of the identifiers of the first device, The method according to any one of claims 3 to 7.

9. The step of transmitting the first signal to the second device is: The method is characterized by including the step of transmitting the first signal to the second device via a physical layer air interface associated with the second device, The method according to any one of claims 3 to 8.

10. The channel on which the target time-domain resource is located is characterized by being the same as or different from the channel used to carry the first signal. The method according to any one of claims 3 to 9.

11. The first signal is characterized in that it is an energy supply signal that supplies energy to the second device, or the first signal is a carrier signal for backscattering by the second device, or the first signal includes a carrier signal for backscattering by the second device. The method according to any one of claims 3 to 10.

12. The method further includes the step of receiving a second signal transmitted from the second device, The method according to any one of claims 1 to 11.

13. The step of receiving the second signal transmitted from the second device is: The process is characterized by including the step of receiving the second signal transmitted from the second device via a physical layer air interface associated with the second device, The method according to claim 12.

14. The information carried by the second signal is: Response ACK information, Trigger information for triggering the SP of the second device, Polling information, and Characterized by including at least one of the data, The method according to claim 12 or 13.

15. The step of obtaining at least one time-domain resource in at least one of the multiple channels by channel access to multiple channels is: The steps include determining a first set of parameters used by the first device when performing channel access, The method is characterized by including the step of acquiring the at least one time-domain resource by channel access to the plurality of channels based on the first parameter set, The method according to any one of claims 1 to 14.

16. The plurality of channels include a primary channel and at least one secondary channel, and the first parameter set is The system is characterized by including at least one of the following: the contention window CW parameter of the primary channel, the latency of the primary channel, and the latency of the secondary channel. The method according to claim 15.

17. The step of obtaining the at least one time-domain resource by channel access to the plurality of channels based on the first parameter set is: The steps include performing channel sensing on the primary channel, If the primary channel is idle, the step of determining that the at least one time-domain resource includes a time-domain resource in the primary channel, The steps include performing channel sensing on the secondary channel during the waiting time of the secondary channel prior to the start time of the time-domain resource in the primary channel, The method is characterized by including the step of determining that, if the secondary channel is idle, the at least one time-domain resource includes a time-domain resource in the secondary channel. The method according to claim 16.

18. The step of obtaining the at least one time-domain resource by channel access to the plurality of channels based on the first parameter set is: The method is characterized by including a step of performing channel access based on the parameter set of each of the plurality of channels. The method according to claim 15.

19. The second device is characterized by being a device that does not have channel access capability. The method according to any one of claims 1 to 18.

20. The second device is characterized by being a zero-power device. The method according to claim 19.

21. The first device is characterized by being an access point device or a relay device. The method according to any one of claims 1 to 20.

22. A wireless communication method applicable to a second device, The process includes the step of receiving a first signal transmitted from a first device, The information carried by the first signal includes first information, wherein the first information is for indicating that at least one time-domain resource acquired by the first device through channel access to a plurality of channels, on at least one of the plurality of channels, includes a target time-domain resource corresponding to the second device, or the first information is for indicating the target time-domain resource. method

23. The second device is associated with the first device, or the second device is a child node device of the first device. The method according to claim 22.

24. When the at least one time domain resource is divided to include a plurality of resource units, the target time domain resource is characterized in that it includes at least one resource unit from the plurality of resource units. The method according to claim 22 or 23.

25. The first information is for indicating at least one resource unit, and / or the first information is for indicating a device corresponding to each of the plurality of resource units, The method according to claim 24.

26. The first bit in the first information is for indicating whether a resource unit corresponding to a device other than the first device includes a resource unit among the plurality of resource units associated with the first bit, or the first bit is for indicating whether a resource unit corresponding to a device associated with the first bit includes a resource unit among the plurality of resource units associated with the first bit. The method according to claim 24.

27. The first information mentioned above is, The identifier of the device that can utilize at least one time-domain resource, and The identifiers include at least one of the identifiers of the device group that can utilize the aforementioned at least one time-domain resource, The method according to claim 22 or 23.

28. The information carried by the first signal is: Information for indicating at least one channel, Information for indicating the at least one time-domain resource, Information for partitioning the at least one time-domain resource, and The invention further includes at least one of the identifiers of the first device, The method according to any one of claims 22 to 27.

29. The channel on which the target time-domain resource is located is characterized by being the same as or different from the channel used to carry the first signal. The method according to any one of claims 22 to 28.

30. The first signal is characterized in that it is an energy supply signal that supplies energy to the second device, or the first signal is a carrier signal for backscattering by the second device, or the first signal includes a carrier signal for backscattering by the second device. The method according to any one of claims 22 to 29.

31. The method further includes the step of transmitting a second signal to the first device, The method according to any one of claims 22 to 30.

32. The information carried by the second signal is: Response ACK information, Trigger information for triggering the SP of the second device, Polling information, and Characterized by including at least one of the data, The method according to claim 31.

33. The second device is characterized by being a device that does not have channel access capability. The method according to any one of claims 22 to 32.

34. The second device is characterized by being a zero-power device. The method according to claim 33, the method.

35. The first device is characterized by being an access point device or a relay device. The method according to any one of claims 22 to 34.

36. A wireless communication method applicable to the first device, Includes a communication unit for obtaining at least one time-domain resource, including a target time-domain resource corresponding to a second device, in at least one of the multiple channels by channel access to multiple channels. Wireless communication method.

37. Includes a communication unit for receiving a first signal transmitted from a first device, The information carried by the first signal includes first information, wherein the first information is for indicating that at least one time-domain resource acquired by the first device through channel access to a plurality of channels, on at least one of the plurality of channels, includes a target time-domain resource corresponding to the second device, or the first information is for indicating the target time-domain resource. The second device.

38. The present invention comprises a transceiver, a processor, and memory, wherein the memory is for storing a computer program, and the processor is for calling and executing the computer program stored in the memory in order to cause the transceiver to perform the method according to any one of claims 1 to 21. The first device.

39. The present invention comprises a transceiver, a processor, and memory, wherein the memory is for storing a computer program, and the processor is for calling and executing the computer program stored in the memory in order to cause the transceiver to perform the method according to any one of claims 22 to 35. The second device.

40. The present invention is characterized by including a processor for calling and executing a computer program from memory in order to cause a device equipped with the chip to execute the method according to any one of claims 1 to 21 or the method according to any one of claims 22 to 35, Tip.

41. The present invention is characterized by storing a computer program that, when executed on a computer, causes the computer to execute the method according to any one of claims 1 to 21 or the method according to any one of claims 22 to 35. Computer-readable storage medium.

42. The present invention is characterized by including a computer program instruction that causes a computer to execute the method according to any one of claims 1 to 21 or the method according to any one of claims 22 to 35. Computer program products.

43. The method described in any one of claims 1 to 21, or the method described in any one of claims 22 to 35, is characterized by causing a computer to perform the method described in any one of claims 22 to 35. Computer program.

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