Wireless communication method and device

Abstract

Provided are a wireless communication method and device, the method being suitable for a first device, the method comprising: through channel access of a plurality of channels, acquiring at least one time domain resource on at least one of the plurality of channels, the at least one time domain resource comprising a target time domain resource corresponding to a second device. In the present application, a first device obtains at least one time domain resource on at least one channel in a plurality of channels through channel access of the plurality of channels, the at least one time domain resource comprising a target time domain resource corresponding to a second device, so that the second device can implement wireless communication on an unlicensed spectrum, and the user experience is improved. And conflicts and interferences with other devices are reduced.

Description

Wireless communication method and device Technical Field

[0001] The 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 are low-complexity and low-cost, maintenance-free, and battery-free. They can support energy harvesting and / or backscatter communications, enabling high-density and large-scale deployment at a low cost. The use of unlicensed frequency bands is also an important deployment scenario in cellular communication systems. However, since zero-power devices lack channel access capabilities, how to achieve communication in unlicensed spectrum while reducing conflicts and interference with other devices is a technical problem that urgently needs to be solved in this field.

[0003] Summary of the Invention

[0004] Embodiments of the present application provide a wireless communication method and device that can implement communication on an unlicensed spectrum and reduce conflicts and interference with other devices.

[0005] In a first aspect, an embodiment of the present application provides a wireless communication method, which is applicable to a first device and includes:

[0006] At least one time domain resource on at least one channel among the multiple channels is acquired through channel access of the multiple channels, where the at least one time domain resource includes a target time domain resource corresponding to the second device.

[0007] In a second aspect, an embodiment of the present application provides a wireless communication method, which is applicable to a second device and includes:

[0008] receiving a first signal sent by a first device;

[0009] The information carried by the first signal includes first information; the first information is used by the first device to obtain at least one time domain resource on at least one of the multiple channels through channel access of multiple channels, including the target time domain resource corresponding to the second device, or the first information is used to indicate the target time domain resource.

[0010] In a third aspect, an embodiment of the present application provides a first device for executing the method of the first aspect or its various implementations mentioned above. Specifically, the first device includes a functional module for executing the method of the first aspect or its various implementations mentioned above.

[0011] In one implementation, the first device may include a processing unit configured to execute functions related to information processing. For example, the processing unit may be a processor.

[0012] In one implementation, the first device may include a transmitting unit and / or a receiving unit. The transmitting unit is configured to perform functions related to transmission, and the receiving unit is configured to perform functions related to reception. For example, the transmitting unit may be a transmitter, and the receiving unit may be a receiver. For another example, if the first device is a communication chip, the transmitting 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.

[0013] In a fourth aspect, an embodiment of the present application provides a second device for executing the method in the second aspect or its respective implementations mentioned above. Specifically, the second device includes a functional module for executing the method in the second aspect or its respective implementations mentioned above.

[0014] In one implementation, the second device may include a processing unit configured to execute functions related to information processing. For example, the processing unit may be a processor.

[0015] In one implementation, the second device may include a transmitting unit and / or a receiving unit. The transmitting unit is configured to perform functions related to transmission, and the receiving unit is configured to perform functions related to reception. For example, the transmitting unit may be a transmitter, and the receiving unit may be a receiver. For another example, if the second device is 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.

[0016] In a fifth aspect, an embodiment of the present application provides a first device, comprising a processor, a memory, and a transceiver. The memory is configured to store a computer program, and the processor is configured to call and execute the computer program stored in the memory, so that the transceiver performs the method of the first aspect or its implementations mentioned above.

[0017] In one implementation, there are one or more processors and one or more memories.

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

[0019] In one implementation, the transceiver includes a transmitter (transmitter) and a receiver (receiver).

[0020] In a sixth aspect, an embodiment of the present application provides a second device, comprising a processor, a memory, and a transceiver. The memory is configured to store a computer program, and the processor is configured to call and execute the computer program stored in the memory, so that the transceiver performs the method of the second aspect or its respective implementations mentioned above.

[0021] In one implementation, there are one or more processors and one or more memories.

[0022] In one implementation, the memory may be integrated with the processor, or the memory may be provided separately from the processor.

[0023] In one implementation, the transceiver includes a transmitter (transmitter) and a receiver (receiver).

[0024] In a seventh aspect, embodiments of the present application provide a chip for implementing the method described in any one of the first and second aspects above, or in their respective implementations. Specifically, the chip includes a processor for calling and executing a computer program from a memory, causing a device equipped with the chip to execute the method described in any one of the first and second aspects above, or in their respective implementations.

[0025] In an eighth aspect, an embodiment of the present application provides a computer-readable storage medium for storing a computer program. When the computer program is run on a computer, the computer executes the method of any one of the first to second aspects mentioned above or any of their implementations.

[0026] In a ninth aspect, an embodiment of the present application provides a computer program product, comprising computer program instructions, which enable a computer to execute the method of any one of the first to second aspects mentioned above or any of their implementations.

[0027] In a tenth aspect, an embodiment of the present application provides a computer program, which, when executed on a computer, enables the computer to execute the method in any one of the first to second aspects mentioned above or in each of their implementations.

[0028] Based on the above technical solution, through channel access of multiple channels, at least one time domain resource on at least one of the multiple channels is obtained, and the at least one time domain resource includes the target time domain resource corresponding to the second device, which enables the second device to realize wireless communication on the unlicensed spectrum and reduce conflicts and interference with other devices. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] FIG1 is a schematic diagram of a communication system provided in an embodiment of the present application.

[0030] FIG2 is an example of a PPDU provided in an embodiment of the present application.

[0031] FIG3 is an example of the frame format of a MAC frame provided in an embodiment of the present application.

[0032] FIG4 is a schematic flowchart of a wireless communication method provided in an embodiment of the present application.

[0033] FIG5 is an example of a channel access process provided in an embodiment of the present application.

[0034] FIG6 is another example of a channel access process provided by an embodiment of the present application.

[0035] FIG7 is an example of a resource unit provided in an embodiment of the present application.

[0036] FIG8 is a schematic block diagram of a first device provided in an embodiment of the present application.

[0037] FIG9 is a schematic block diagram of a second device provided in an embodiment of the present application.

[0038] FIG10 is a schematic block diagram of a fourth device provided in an embodiment of the present application.

[0039] FIG11 is a schematic block diagram of a chip provided in an embodiment of the present application. DETAILED DESCRIPTION

[0040] The technical solutions in the embodiments of the present application will be described below with reference to the accompanying drawings.

[0041] The embodiments of the present application can be applied to various communication systems. For example, applicable communication systems include, but are not limited to, Global System of Mobile communication (GSM) system, Code Division Multiple Access (CDMA) system, Wideband Code Division Multiple Access (WCDMA) system, General Packet Radio Service (GPRS), Long Term Evolution (LTE) system, Advanced Long Term Evolution (LTE-A) system, New Radio (NR) system, NR system evolution system, LTE-based access to unlicensed spectrum (LTE-U) system on unlicensed spectrum, NR-based access to unlicensed spectrum (NR-U) system on unlicensed spectrum, Universal Mobile Telecommunication System (UMTS), Wireless Local Area Networks (WLAN), Wireless Fidelity (WiFi), next generation communication system, zero power communication system, cellular Internet of Things, cellular passive Internet of Things or other communication systems.

[0042] Among them, the cellular Internet of Things is the development product of the combination of cellular mobile communication network and Internet of Things. It is also called passive cellular Internet of Things. It is composed of network equipment and passive terminals. In the cellular passive Internet of Things, passive terminals can communicate with other passive terminals through network equipment, or passive terminals can communicate using device to device (D2D) communication, and the network equipment only needs to send a carrier signal, that is, a power supply signal, to supply energy to the passive terminal.

[0043] Generally speaking, traditional communication systems support a limited number of connections and are easy to implement. However, with the development of communication technology, mobile communication systems will not only support traditional communications, but will also support, for example, D2D communication, machine-to-machine (M2M) communication, machine-type communication (MTC), and vehicle-to-vehicle (V2V) communication, etc. The embodiments of the present application can also be applied to these communication systems.

[0044] It should be understood that the communication system in the embodiment of the present application can be applied to a carrier aggregation (CA) scenario, a dual connectivity (DC) scenario, and a standalone (SA) networking scenario. The embodiment of the present application does not limit the spectrum to which it is applied. For example, the embodiment of the present application can be applied to a licensed spectrum or an unlicensed spectrum.

[0045] FIG1 is a schematic diagram of a communication system 100 provided in an embodiment of the present application.

[0046] As shown in Figure 1, the communication system 100 may include a network device 110, which may be a device that communicates with a terminal device 120 (or a communication terminal or terminal). The network device 110 may provide communication coverage for a specific geographic area and may communicate with terminal devices within the coverage area.

[0047] Exemplarily, the network device 110 may be a device for communicating with a mobile device. The network device 110 may be an access point (AP) in WLAN, a base station (BTS) in GSM or CDMA, a base station (NodeB, NB) in WCDMA, an evolved base station (eNB or eNodeB) in LTE, or a relay station or access point, or a vehicle-mounted device, a wearable device, a network device (gNB) in an NR network, or a network device in a future evolved PLMN network, etc.

[0048] Among them, the network device 110 provides services for the cell, and the terminal device 120 communicates with the network device through the transmission resources used by the cell (for example, frequency domain resources, or spectrum resources). The cell can be the cell corresponding to the network device 110 (for example, a base station). The cell can belong to a macro base station or a base station corresponding to a small cell. The small cells here may include: urban cells (Metro cell), micro cells (Micro cell), pico cells (Pico cell), femto cells (Femto cell), etc. These small cells have the characteristics of small coverage and low transmission power, and are suitable for providing high-speed data transmission services.

[0049] Exemplarily, the terminal device 120 may also be referred to as user equipment (UE), an access terminal, a user unit, a user station, a mobile station, a mobile station, a remote station, a remote terminal, a mobile device, a user terminal, a terminal, a wireless communication device, a user agent or a user device, etc. The terminal device may be a station (STAION, ST) in a WLAN, a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA) device, a handheld device with wireless communication capabilities, a computing device or other processing device connected to a wireless modem, an in-vehicle device, a wearable device, and a next-generation communication system, for example, a terminal device in an NR network or a terminal device in a future evolved Public Land Mobile Network (PLMN) network, or a zero-power device, etc.

[0050] For example, the terminal device 120 can be a wearable device. Wearable devices can also be called wearable smart devices, which are a general term for wearable devices that use wearable technology to intelligently design and develop wearable devices for daily wear, such as glasses, gloves, watches, clothing and shoes. A wearable device is a portable device that is worn directly on the body or integrated into the user's clothes or accessories. Wearable devices are not only hardware devices, but also achieve powerful functions through software support, data interaction, and cloud interaction. Broadly speaking, wearable smart devices include full-featured, large-sized, and independent of smartphones to achieve complete or partial functions, such as smart watches or smart glasses, as well as those that only focus on a certain type of application function and need to be used in conjunction with other devices such as smartphones, such as various smart bracelets and smart jewelry for vital sign monitoring.

[0051] For another example, the terminal device 120 may be a zero-power device. A zero-power device may be understood as a device whose power consumption is lower than a preset power consumption, including, for example, a passive terminal or even a semi-passive terminal.

[0052] It should be understood that FIG1 is merely an example of the present application and should not be construed as limiting the present application.

[0053] For example, in other alternative embodiments, the communication system 100 may include multiple network devices and each network device may include other numbers of terminal devices within its coverage area. For another example, a device having a communication function in a network / system in an embodiment of the present application may be referred to as a communication device. Taking the communication system 100 shown in FIG1 as an example, the communication device may include a network device 110 and a terminal device 120 having a communication function. The network device 110 and the terminal device 120 may be the specific devices described above and will not be described in detail here. The communication system 100 may also include other communication devices, such as a network controller and other network entities such as a mobility management entity, which is not specifically limited in the embodiment of the present application.

[0054] Furthermore, it should be understood that the terms "system" and "network" are often used interchangeably herein. The term "and / or" in this document simply describes an association relationship between associated objects, indicating that three possible relationships exist. For example, "A and / or B" can represent: A exists alone, A and B exist simultaneously, or B exists alone. Furthermore, the character " / " in this document generally indicates that the associated objects are in an "or" relationship. The term "correspond" in this document can indicate a direct or indirect correspondence between two objects, an association relationship between two objects, or a relationship between an indicator and the indicated, a configuration and the configured, and so on. The term "indicate" in this document can mean a direct indication, an indirect indication, or an association relationship. For example, "A indicates B" can mean that A directly indicates B, for example, B can obtain information through A; it can also mean that A indirectly indicates B, for example, A indicates C, and B can obtain information through C; or it can mean that A and B have an association relationship. The term "predefined" in this document can be implemented by pre-saving corresponding codes, tables or other methods that can be used to indicate relevant information in a device (for example, including a terminal device and a network device), and this application does not limit its specific implementation method. For example, pre-configuration can refer to what is defined in the protocol. It should also be understood that in the embodiments of the present application, the "protocol" can refer to a standard protocol in the field of communications, such as the LTE protocol, the NR protocol, and related protocols used in future communication systems, and this application does not limit this.

[0055] Taking an example to facilitate understanding of the technical solution provided by this application, zero-power consumption devices and related technologies are described below.

[0056] (1) Classification of zero-power terminals.

[0057] Based on the energy source and usage of zero-power terminals, zero-power terminals can be divided into the following types:

[0058] 1. Passive zero-power terminal.

[0059] Zero-power devices do not require internal batteries. When they approach network devices (such as the reader / writer of a radio frequency identification (RFID) system), they are within the near field formed by the radiation from the network device's antenna. Therefore, the zero-power device antenna generates an induced current through electromagnetic induction, which drives the low-power chip circuit of the zero-power device. This implements tasks such as demodulating the forward link signal (downlink, the link from the network device to the zero-power device) and modulating the backward link signal (uplink, the link from the zero-power device to the network device). For backscatter links, the zero-power device uses backscattering to transmit signals.

[0060] It can be seen that the passive zero-power device does not require a built-in battery to drive either the forward link or the reverse link, and is a truly zero-power device.

[0061] Passive zero-power devices do not require batteries, and their RF and baseband circuits are very simple. For example, they do not require a low-noise amplifier (LNA), a power amplifier (PA), a crystal oscillator, or an analog-to-digital conversion (ADC). Therefore, they have many advantages such as small size, light weight, very low price, and long service life.

[0062] Passive zero-power terminals can also support other energy collection methods. By collecting energy from the environment (such as light energy, thermal energy, kinetic energy, mechanical energy, etc.), they can obtain energy for driving circuits and support terminal devices to communicate.

[0063] 2. Semi-passive zero-power terminal.

[0064] Semi-passive zero-power devices do not have conventional batteries installed themselves, but can use radio frequency (RF) energy harvesting modules to harvest radio wave energy or use energy harvesting modules to harvest energy from the environment (such as solar energy, thermal energy, mechanical vibration energy, etc.), and store the harvested energy in an energy storage unit (such as a capacitor). After the energy storage unit obtains energy, it can drive the low-power chip circuit of the zero-power device. It can realize tasks such as demodulation of forward link signals and modulation of backward link signals. For backscatter links, zero-power devices use backscatter implementation to transmit signals.

[0065] It can be seen that the semi-passive zero-power device does not require a built-in battery to drive either the forward link or the reverse link. Although it uses energy stored in capacitors during operation, the energy comes from the radio energy collected by the energy harvesting module. Therefore, it is also a truly zero-power device.

[0066] Semi-passive zero-power devices inherit many advantages of passive zero-power devices, so they have many advantages such as small size, light weight, very low price, and long service life.

[0067] 3. Active zero-power terminal.

[0068] The zero-power devices used in some scenarios can also be active zero-power devices. Such terminals can have built-in batteries (conventional batteries, such as dry batteries, rechargeable lithium batteries, etc.). The battery is used to drive the low-power chip circuit of the zero-power device. It realizes the demodulation of the forward link signal and the modulation of the reverse link signal. However, for the backscatter link, the zero-power device uses the backscatter implementation method to transmit the signal. Therefore, the zero power consumption of this type of terminal is mainly reflected in the fact that the signal transmission of the reverse link does not require the terminal's own power, but uses the backscatter method. Although the active zero-power device uses a battery, due to the sampling of ultra-low power communication technology, the power consumption is very low, so compared with the existing technology, the battery life can be greatly improved.

[0069] Active zero-power devices, with built-in batteries to power the RFID chip, increase the tag's read and write distance and improve communication reliability. Therefore, they are suitable for scenarios with relatively high requirements for communication distance and read latency.

[0070] It is worth noting that some zero-power terminals, such as semi-passive zero-power terminals or active zero-power terminals, can also have the ability to actively transmit, that is, in addition to communicating through backscattering, the backward link can also use active transmission to communicate.

[0071] (2) Cellular passive Internet of Things.

[0072] As 5G industry applications expand, the types of connected objects and application scenarios will increase, placing higher demands on the price and power consumption of communication terminals. The application of battery-free, low-cost passive IoT devices has become a key technology for cellular IoT, expanding the types and number of terminals connected to 5G networks and truly realizing the interconnection of everything. Passive IoT devices can be based on existing zero-power devices and expanded upon them for use in cellular IoT.

[0073] (3) Equipment based on ambient energy.

[0074] In NR and Wi-Fi systems, the battery-free and low-cost nature of devices can support low-cost, large-scale deployment and maintenance-free IoT devices. IoT devices that support ambient energy in NR and Wi-Fi systems are called Ambient IoT or Ambient Powered IoT (AMP IoT) devices. Ambient IoT refers to IoT devices that use various ambient energies, such as radio frequency energy, light energy, solar energy, thermal energy, and mechanical energy. Ambient IoT devices can have no energy storage capabilities or very limited energy storage capabilities (such as using capacitors with a capacity of tens of microfarads). These devices are similar to passive or semi-passive devices in zero-power communications.

[0075] (4) Physical layer protocol data unit (PPDU) in WIFI technology.

[0076] The information of WIFI devices is transmitted based on PPDU frames.

[0077] FIG2 is an example of a PPDU provided in an embodiment of the present application.

[0078] As shown in Figure 2, the PPDU frame consists of a physical layer header and a data portion. The physical layer header consists of three parts: a short training field (STF), a long training field (LTF), and a data portion with some specific settings, named SIGNAL. The STF consists primarily of 10 short symbols (t1-t10), each 0.8µs long. It includes many functions, primarily implementing frame synchronization and coarse frequency synchronization. T1-t7 primarily include functions such as signal detection, automatic gain control (AGC), and diversity selection, while T8-t10 primarily include functions such as coarse frequency, offset estimation, and timing synchronization. The LTF implements fine frequency synchronization and channel estimation. The SIGNAL portion carries information related to the data portion, including the data rate, packet length, reserved bits, and tail bits.

[0079] The data portion of the PPDU carries the MAC frame.

[0080] FIG3 is an example of the frame format of a MAC frame provided in an embodiment of the present application.

[0081] As shown in FIG3 , the frame format of a MAC frame includes the following parts: a MAC header, a frame body, and a frame check sequence (FCS).

[0082] (5) Unlicensed spectrum.

[0083] Unlicensed spectrum is a spectrum designated by countries and regions for use by radio equipment. This spectrum is generally considered shared spectrum, meaning that communication devices in different communication systems can use it as long as they meet the regulatory requirements set by the country or region for that spectrum, without having to apply for exclusive spectrum authorization from the government. To ensure the harmonious coexistence of various communication systems using unlicensed spectrum for wireless communications, some countries or regions have established regulatory requirements that must be met for the use of unlicensed spectrum. For example, in Europe, communication devices adhere to the "listen-before-talk" (LBT) principle. This means that before transmitting on a channel in unlicensed spectrum, a communication device must first sense the channel. Only when the channel sense result indicates that the channel is idle can the communication device transmit. If the channel sense result indicates that the channel is busy, the communication device cannot transmit. Furthermore, to ensure fairness, the duration of a communication device's transmission on an unlicensed spectrum channel cannot exceed the Maximum Channel Occupation Time (MCOT) during a transmission.

[0084] Standardized technologies for using unlicensed spectrum in cellular communication systems, such as NR-U technology in 3GPP Rel-16, utilize unlicensed frequency bands below 7 GHz. Subsequent technological evolution will also consider the use of unlicensed spectrum in higher frequency bands, as well as related technologies, such as the 52.6 GHz to 71 GHz band discussed in Rel-17. Widely used Wi-Fi technology also utilizes unlicensed frequency bands.

[0085] (6) Channel access mechanism.

[0086] In the 802.11 protocol, the basic channel access protocol is the Distributed Coordination Function (DCF), which uses the Carrier Sense Multiple Access with Collision Avoidance (CSMA / CA) mechanism to enable different compatible stations (STAs) to share the channel, thereby reducing the probability of conflicts.

[0087] DCF mainly consists of four core mechanisms:

[0088] 1. Carrier sense mechanism.

[0089] The carrier sense mechanism is divided into physical carrier sense and virtual carrier sense. If the result of either sense indicates that the channel is busy, then the channel is busy.

[0090] Physical carrier sensing uses three channel idle detection methods: energy detection, carrier detection, and energy-carrier hybrid detection, collectively referred to as CCA. Energy detection determines the energy level of the received signal. When the received power exceeds the physical layer threshold ED_threshold, the channel is considered occupied. Carrier detection detects the preamble portion of the channel signal and determines whether the channel is occupied based on the detection result.

[0091] The virtual carrier sensing mechanism is provided by the MAC, and the 802.11 standard uses the Network Allocation Vector (NAV) to implement virtual sensing. The Dur / ID field in the MAC frame stores the "duration". For the STA that receives this information, it determines how long the channel will be occupied and how long its own transmission needs to be delayed. NAV is a timer that is used to define how long the current channel will be occupied. The starting value is the duration of the last received frame and the countdown ends when it reaches 0. Each monitoring STA uses this NAV timer. During data communication, the STA occupying the channel will inform other STAs how long it will take through the duration field in the frame, and the STA that has not acquired the channel will update its own NAV value by comparing the duration value in the received packet. The current channel is considered to be idle only when the NAV value is 0 and the physical carrier sensing indicates that the channel is idle.

[0092] 2. Interframe space (IFS) mechanism.

[0093] To minimize collisions, 802.11 stipulates that after completing a transmission, all stations must wait for a short period (continue listening) before sending the next frame. This period is commonly known as the IFS. The length of the IFS depends on the type of frame the station is sending. High-priority frames require a shorter wait time and therefore receive priority, while low-priority frames must wait longer. If a low-priority frame has not yet been sent while other high-priority frames have already been sent to the media, the media becomes busy and the low-priority frame must be postponed. This reduces the chance of collisions.

[0094] IFS provides different priorities for wireless medium access. Different priorities are divided according to the length of the IFS time. The shorter the time, the higher the corresponding priority. The interframe interval time is listed from small to large as follows:

[0095] 1. Short interframe space (SIFS).

[0096] SIFS is the shortest time interval used to separate frames that require an immediate response, such as control frames (RTS / CTS / ACK). Using the shortest interval between two transmissions in a frame exchange sequence prevents other stations waiting for the medium from attempting to use the medium.

[0097] 2. Point Coordination function interframe space (PIFS).

[0098] PIFS can only be used by stations operating in Point Coordination Function (PCF) mode.

[0099] 3. Distributed Coordination Function interframe space (DIFS).

[0100] Can only be used by sites operating in Distributed Coordination Function (DCF) mode.

[0101] 4. Extended Interframe Space (EIFS): If the previous frame is erroneous, the sending node has to delay the next frame for EIFS instead of DIFS.

[0102] 3. Random backoff mechanism.

[0103] 802.11 uses a binary exponential backoff method to address the time a node needs to back off when a transmission fails or a collision occurs. When the Media Access Control (MAC) layer has a frame to transmit, after both physical and virtual carrier sense signals indicate the channel is idle, if the backoff window count is not zero, the count continues to decrease by slot time. Otherwise, a randomly generated backoff window is used for backoff. Within the contention window, the node selects a random backoff count based on a random number. Once the backoff time is selected, it effectively sets a backoff timer. The contention window value is a parameter between the minimum contention window (CWmin) and the maximum contention window (CWmax) of the physical characteristic values, allowing the node to select the range of the random backoff count. A station continuously monitors the channel within the slot time. If the channel is idle, the backoff timer continues to count down by 1. If the channel is busy, the remaining backoff timer is frozen, and the node waits for the channel to become idle again and for another DIFS to elapse before resuming the countdown from the remaining time. When the backoff timer reaches zero, the entire data frame begins to be sent.

[0104] 4. RTS / CTS handshake mechanism.

[0105] IEEE 802.11 RTS / CTS stands for Request To Send / Clear To Send (RTS / CTS) protocol, which is a mechanism adopted by the 802.11 protocol to reduce conflicts caused by hidden node problems. The basic idea of ​​the RTS / CTS mechanism is to reserve a channel through a short control packet. If the sending station wants to send a message to the receiving station, it must first send an RTS control frame. After the stations around the sending station receive this RTS, they set their own network allocation vector (NAV) value according to the duration field. After receiving the RTS, the receiving station replies with a CTS control frame. After receiving the CTS, the stations around the receiving station set their own NAV value according to the duration field. Stations with NAV values ​​not equal to 0 cannot perform channel idle monitoring, thereby avoiding conflicts with the transmission between the sending station and the receiving station.

[0106] As can be seen from the above, zero-power devices offer low complexity and cost, are maintenance-free, and require no batteries. They can support energy harvesting and / or backscatter communications, enabling high-density and large-scale deployment at a low cost. The use of unlicensed frequency bands is also an important deployment scenario in cellular communication systems.

[0107] Due to their power consumption limitations, zero-power terminals require low complexity. For example, their receivers only support simple modulation and demodulation methods, such as ASK and FSK, but not OFDM. However, to ensure fair channel usage when using unlicensed spectrum, if a zero-power terminal needs to occupy a channel for data transmission, it must also perform corresponding CCA to determine whether the channel is idle. It also needs to support the CSMA / CA mechanism for compatibility and coexistence with existing devices. Taking WiFi systems as an example, zero-power terminals must support the DCF protocol to ensure channel occupancy. This requires the zero-power terminal to detect existing PPDU frames sent based on OFDM to meet physical and virtual carrier sensing, as well as support the RTS / CTS mechanism, which is not possible for zero-power terminals. In view of this, the present application provides a wireless communication method that, when using unlicensed spectrum, enables zero-power terminals to share channels with existing devices for communication, reducing conflicts and interference. Specifically, different countries and regions have different regulations for the use of unlicensed spectrum below 1 GHz. The communication technology used in the corresponding frequency bands must meet spectrum usage regulations. For example, 802.11ah technology is mainly aimed at supporting IoT devices. The spectrum it uses is below 1GHz, and the supported channel bandwidths include 1MHz, 2MHz, 4MHz, 8MHz and 16MHz. Among them, 1MHz and 2MHz are the basic channel bandwidths. In China, the use of the 920-925MHz frequency band for radio frequency identification requires that the channel bandwidth is no more than 250kHz, and the channel center frequency is fc(MHz)=920.125+M×0.25 (M is an integer, ranging from 0 to 19). The working mode is frequency hopping, and the maximum dwell time of each frequency hopping channel is 2 seconds. These spectrum usage specifications are intended to ensure fairness in the use of spectrum by different devices and to reduce mutual interference. In a multi-channel access scenario, channel access may access multiple channels at the same time, and use the channel for transmission after successful channel access. In view of this, an embodiment of the present application provides a method for achieving zero-power device transmission under multi-channel access conditions.

[0108] FIG4 is a schematic flowchart of a wireless communication method 200 provided in an embodiment of the present application. The wireless communication method 200 may be interactively executed by a first device and a second device.

[0109] As shown in FIG4 , the method 200 may include:

[0110] S210: The first device obtains at least one time domain resource on at least one channel among the multiple channels through channel access of the multiple channels, where the at least one time domain resource includes a target time domain resource corresponding to the second device.

[0111] In other words, the first device can obtain time domain resources on at least one of the multiple channels through multi-channel channel access. The at least one time domain resource at least includes a target time domain resource reserved for the second device, or in other words, the at least one time domain resource at least includes a target time domain resource allocated to the second device.

[0112] For the first device, the at least one time domain resource obtained by the first device through channel access, the time domain resource here may also be referred to as a transmission opportunity (TXOP) obtained by the first device, a target wake time (TWT), a service period (SP), a restricted access window (RAW), a channel occupancy time, or other terms with similar meanings. That is, the at least one time domain resource may include a TXOP, a TWT, an SP, a RAW, or a time period in a RAW on the at least one channel.

[0113] Similarly, for the second device, the target time domain resource is the time domain resource reserved by the first device for the second device, which may also be referred to as a TXOP, TWT, SP, RAW, a time period in RAW, or other terms with similar meanings used by the second device. That is, the target time domain resource may include at least one of the following: TXOP, TWT, SP, RAW, and a time period in RAW.

[0114] Exemplarily, the target time domain resource may be a resource used by the second device to send information and / or receive information.

[0115] In this embodiment, the first device obtains at least one time domain resource on at least one of the multiple channels through channel access of multiple channels. The at least one time domain resource includes the target time domain resource corresponding to the second device, enabling the second device to achieve wireless communication on the unlicensed spectrum and reduce conflicts and interference with other devices.

[0116] In some embodiments, the first device can be any device with relay functionality (i.e., both Relay AP and Relay STA functionality). For example, the second device can communicate with other devices through the first device. For example, the first device includes, but is not limited to, an AP or STA in a WiFi system, a base station or UE in a cellular system, a power supply device, a control node in a communication network, and the like.

[0117] In some embodiments, the first device may be an AP device.

[0118] In some embodiments, the second device is a device that does not have channel access capability.

[0119] In this embodiment, the first device may occupy a channel for the second device that does not have the channel access capability, so that the second device can obtain a TXOP or channel occupation time.

[0120] In some embodiments, the device without channel access capability comprises a zero-power device.

[0121] From the perspective of power supply, zero-power devices can include devices based on ambient energy, such as ambient power enabled IoT devices (AMP IoT) or ambient energy IoT devices, battery-free terminals, maintenance-free terminals, etc. AMP IoT refers to IoT devices that use various ambient energies, such as wireless radio frequency energy, light energy, solar energy, thermal energy, mechanical energy, and other ambient energies. Ambient IoT devices can have no energy storage capabilities or very limited energy storage capabilities (such as using capacitors with a capacity of tens of microfarads (uF)). Zero-power devices can serve as communication terminals in WiFi or cellular networks.

[0122] In this embodiment, the first device occupies a channel for a zero-power device that does not have channel access capability, so that the zero-power device can obtain a transmission opportunity. This method not only ensures the compatibility of the zero-power device with the channel access mechanism of existing devices, but also enables the zero-power device to achieve wireless communication on the unlicensed spectrum. At the same time, the first device can also provide a relay function for the communication between the AP and the zero-power device, thereby not only improving the coverage of the AP but also reducing the impact on the existing AP. The AP does not need to support a new physical layer air interface, and can support communication with the zero-power device only through software upgrades. The deployment cost is low and compatibility with the existing system is guaranteed.

[0123] 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.

[0124] Exemplarily, the second device is associated with the first device, that is, the second device is connected to the first device upward, or the first device is connected to the second device downward.

[0125] Of course, in other alternative embodiments, the first device may also be connected downward to other devices. For example, the device connected downward to the first device may be a device of the same type or a different type as the second device. This application does not make any specific limitations on this.

[0126] Exemplarily, when the second device is a child node device of the first device, the first device may also be referred to as a parent node device of the second device.

[0127] In some embodiments, the sub-node device includes at least one of the following:

[0128] Devices included in a Basic Service Set (BSS) provided by the first device;

[0129] A device associated with the first device.

[0130] Exemplarily, when the BSS association provided by the first device includes the second device, it indicates that the second device is a device associated with the first device. Alternatively, when the second device is associated with the first device, the BSS association provided by the first device includes the second device.

[0131] Exemplarily, when the BSS association provided by the first device includes the second device, the at least one time domain resource includes the target time domain resource; or, when the second device is a device associated with the first device, the at least one time domain resource includes the target time domain resource.

[0132] It is worth noting that BSS is the basic service unit of a wireless network and the basic structure of an 802.11 network. Due to the shared nature of the wireless medium, the BSS provided by the first device can be understood as a service set consisting of multiple devices (e.g., STAs) associated with the first device. Within the BSS provided by the first device, multiple devices associated with the first device are connected to the first device, and the multiple devices associated with the first device can communicate or access other devices through the first device.

[0133] In some embodiments, the S210 may include:

[0134] The first device determines a first parameter set used by the first device when performing channel access; and then acquires the at least one time domain resource through channel access of the multiple channels based on the first parameter set.

[0135] Since the zero-power terminal cannot support the existing channel access mechanism, it needs to use the channel to send data with the help of the first device serving it to access the channel and obtain TXOP for the zero-power terminal. The first device can obtain channel access to at least one channel at the same time through the channel access mechanism, that is, obtain TXOP on at least one channel. In this embodiment, when the first device obtains channel access for the transmission of the zero-power device, a certain channel access priority can be guaranteed by setting certain parameters. It is worth noting that in the process of multi-channel access, since the results of the CCA performed by the first device on multiple channels may be different, the channel set for successfully obtaining TXOP and the channel set for the first device to perform CCA may be different. For example, the former may be a subset of the latter.

[0136] In some embodiments, the plurality of channels include a primary channel and at least one secondary channel; and the first parameter set includes at least one of the following:

[0137] Contention window (CW) parameters of the primary channel, idle duration of the primary channel, and idle duration of the secondary channel.

[0138] Under the enhanced distributed channel access (EDCA) mechanism, different service types can set different access categories (ACs), and each AC can correspond to a different set of EDCA parameters to meet different AC priorities. EDCA parameters include waiting time and CW parameters. The waiting time may include DIFS, PIFS, etc., and the CW parameters may include CWmin and CWmax. In combination with the solution of the present application, in the case of multi-channel access, specific EDCA parameters can be defined for the access type. For example, the channel for the first device to perform channel access may include a primary channel (primary channel) and several secondary channels (secondary channels), thereby further defining the CW parameters of the primary channel, the waiting time of the primary channel, and the waiting time of the secondary channel.

[0139] In some embodiments, the first device acquires the at least one time domain resource through channel access of the multiple channels based on the first parameter set, including:

[0140] Performing channel sensing on the primary channel;

[0141] If the primary channel is idle, determining that the at least one time domain resource includes a time domain resource on the primary channel;

[0142] Performing channel sensing on the auxiliary channel within a waiting time of the auxiliary channel before a start time of the time domain resource on the primary channel;

[0143] If the secondary channel is idle, determining that the at least one time domain resource includes a time domain resource on the secondary channel.

[0144] Exemplarily, the first device performs EDCA channel access on the primary channel, and performs CCA on the secondary channel within a waiting time before the start of the obtained TXOP. If the result is idle, the TXOP obtained by the first device includes the TXOP on the secondary channel.

[0145] FIG5 is an example of a channel access process provided in an embodiment of the present application.

[0146] As shown in Figure 5, assuming the first device is an AP, it performs channel access on primary channel #0. Before the start of the acquired TXOP, it performs CCA on secondary channels #1-3 for a waiting time of 2. If these channels are idle, the first device acquires a TXOP on channels #0-3. For other STAs, the corresponding channels are busy while the first device acquires the TXOP. For example, waiting time 1 = DIFS, and waiting time 2 = PIFS. The EDCA parameters corresponding to this multi-channel access type include not only waiting time 1 and CW parameters for channel access on the primary channel, but also waiting time 2 for channel access on the secondary channels.

[0147] In some embodiments, the first device performs channel access based on a set of parameters for each of the plurality of channels.

[0148] In this embodiment, the first device may use a parameter set for each of the multiple channels to perform independent channel access on the corresponding channel; the parameter sets for the multiple channels may be the same or different. In other words, the first device may perform independent EDCA on each channel in a channel set, where the AC corresponding to the EDCA of each channel may be the same or different.

[0149] It should be noted that this application does not limit the channel access mechanism for the first device to perform multi-channel access. The above mechanism is only an example of this application. The first device may also have other channel access mechanisms. For example, when the first channel performs channel access on multiple channels, some channels (one or more channels) may use a shared parameter set, and another part of the channels (one or more channels) may use an independent parameter set.

[0150] After obtaining multi-channel channel access, in order to protect the first device from conflicts caused by channel access by third-party devices during the TXOP, the first device can send a NAV-setting frame after obtaining the TXOP. The transmission of this type of frame allows the third-party STA to set the NAV. Before the NAV returns to zero, the third-party STA will not attempt to perform a CCA, thereby protecting the TXOP. Specifically, the NAV-setting frame can be an RTS or CTS frame, or other types of frames. The duration field it contains can be used to reserve the channel occupancy time required for zero-power device communication.

[0151] FIG6 is another example of a channel access process provided by an embodiment of the present application.

[0152] As shown in Figure 6, assuming that the first device is an AP, after obtaining a TXOP of four channels, the first device can send RTSs on each of the four channels, causing the third-party STA to set the corresponding NAV. During the TXOP, the STA will consider the status of the four channels to be busy, i.e., it will not attempt to perform CCA.

[0153] In some embodiments, the method 200 may further include:

[0154] S220, the first device sends a first signal to the second device; wherein, the information carried by the first signal includes first information; the first information is used to indicate that the at least one time domain resource includes the target time domain resource, or the first information is used to indicate the target time domain resource.

[0155] After the first device obtains the TXOP on at least one channel, it needs to send the first information to the zero-power device so that the zero-power device can determine its own TXOP (i.e., the target time domain resource mentioned above) based on the first information. The TXOP belongs to one channel on the at least one channel, and the TXOP corresponding to the zero-power device is a part of the time period in the TXOP obtained by the first device (i.e., the at least one time domain resource mentioned above). The time period is the TXOP corresponding to the zero-power device, and can also be called the SP or TWT corresponding to the zero-power device or other similar terms. Specifically, the first device sends a first signal to the zero-power device through the first channel, and the first signal carries the first information. The first channel is any one of the multiple channels obtained by the first device through channel access, such as the main channel. The first information can enable the zero-power device to determine the channel used for transmission and the target time period or time window information for transmission on the channel, such as TXOP, SP, and TWT.

[0156] In some embodiments, when the at least one time domain resource is divided into a plurality of resource units, the target time domain resource includes at least one resource unit among the plurality of resource units.

[0157] In this embodiment, the at least one time domain resource is divided into multiple resource units. When the TXOPs of multiple signals obtained by the first device are shared with multiple zero-power devices, different zero-power devices can use different resource units for transmission, thereby avoiding collisions and interferences between transmissions of different zero-power devices. This is equivalent to performing multi-channel channel access through the first device, which can occupy channels for zero-power devices that do not have channel access capabilities, and enable zero-power devices to obtain transmission opportunities. In addition, by introducing the first information, it is beneficial for zero-power devices to determine the resource units that can be used for transmission on the multi-channel TXOP, which not only enables multiple zero-power devices to share the use of the multi-channel TXOP, but also improves transmission efficiency. At the same time, this method ensures compatibility with the channel access mechanism of existing devices and realizes communication of zero-power terminals.

[0158] In some embodiments, the first information is used to indicate the at least one resource unit.

[0159] In other words, the first information may directly indicate the resource units included in the target time domain resources corresponding to the second device, or in other words, the first information may directly indicate the resource units used by the second device.

[0160] In some embodiments, the first information is used to indicate a device corresponding to each of the multiple resource units.

[0161] Exemplarily, when the first information is used to indicate a device corresponding to each of the multiple resource units, the first device may send the first information to each device that can use the multiple resource units.

[0162] In some embodiments, the first bit in the first information is used to indicate whether the resource unit corresponding to a device other than the first device includes the resource unit associated with the first bit in the multiple resource units.

[0163] Exemplarily, devices other than the first device may include one or more zero-power devices associated with the first device. For example, the first information may indicate whether one or more zero-power devices associated with the first device are transmitting within a TXOP (for example, including multiple resource units); after the target zero-power device that is instructed to transmit receives the first information, it may determine the position of the target resource unit within the TXOP according to preset rules. For example, the target zero-power device may calculate the position of its target resource unit among the 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 calculation on the ID of the target zero-power device to determine the position of its target resource unit among the multiple resource units included in the TXOP.

[0164] Exemplarily, devices other than the first device may include all zero-power devices associated with the first device. For example, the first information may indicate whether all zero-power devices associated with the first device can be used for transmission in each resource unit in a TXOP (for example, including multiple resource units), which is equivalent to indicating whether one or more resource units in N resource units can be used for transmission. After receiving the first information, the target zero-power device can determine the position of its target resource unit in one or more resource units indicated to be available for transmission according to preset rules. For example, the target zero-power device can calculate the position of its target resource unit among the multiple 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 calculation on the ID of the target zero-power device to determine the position of its target resource unit among the multiple resource units included in the TXOP.

[0165] In this embodiment, the first bit in the first information is used to indicate whether the resource unit corresponding to the device other than the first device includes the resource unit associated with the first bit in the multiple resource units. This is equivalent to the first information being able to indicate the resource units that can be used for transmission on multiple resource units by devices other than the first device. This not only enables devices other than the first device to share and use resource units on multiple channels, but also improves transmission efficiency.

[0166] In some embodiments, the first bit in the first information is used to indicate whether the resources corresponding to the device associated with the first bit include the resource unit associated with the first bit in the multiple resource units.

[0167] Exemplarily, the first information can directly indicate the time period and channel of one or more zero-power devices. For example, the TXOPs of multiple channels obtained by the first device are divided into N resource units according to certain rules or parameters indicated by the first device, and each resource unit includes a time unit on a channel. The first information may include a bitmap, each bit in the bitmap corresponds to one or more of the multiple zero-power devices associated with the first device; at the same time, each bit 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.

[0168] FIG7 is an example of a resource unit provided in an embodiment of the present application.

[0169] As shown in Figure 7, assuming that the first device is an AP, the AP obtains a TXOP for four channels, and the TXOP on each channel is equally divided into six resource units. In this case, the AP can indicate a first information, for example, the first information is a bitmap, and the bits in the bitmap can correspond to resource units, or can correspond to zero-power devices, or correspond to both resource units and zero-power devices. For example, the bits in the bitmap correspond to both resource units and zero-power devices. When the bit is set to 1, the corresponding zero-power device transmits on the corresponding resource unit.

[0170] In some embodiments, the first information includes at least one of the following:

[0171] an identification of a device that can use the at least one time domain resource;

[0172] An identification of a group of devices that can use the at least one time-domain resource.

[0173] Exemplarily, when the first information is used to indicate that the at least one time domain resource includes the target time domain resource, and when the first information includes an identifier of a device that can use the at least one time domain resource, the identifier of the device that can use the at least one time domain resource includes an identifier of the second device.

[0174] Exemplarily, when the first information is used to indicate that the at least one time domain resource includes the target time domain resource, and when the first information includes an identifier of a device group that can use the at least one time domain resource, the identifier of the device group that can use the at least one time domain resource includes an identifier of the device group to which the second device belongs.

[0175] Exemplarily, when the first information includes an identifier of a device that can use the at least one time domain resource, or when the first information includes an identifier of a device group that can use the at least one time domain resource, the second device can determine the target time domain resource according to a predefined rule. For example, assuming that the second device is a target zero-power device, the target zero-power device can calculate the position of its target resource unit among multiple resource units based on the ID of the target zero-power device. For example, the target zero-power device can perform a modulo calculation on the ID of the target zero-power device to determine the position of its target resource unit among multiple resource units. The multiple resource units can be resource units at preset positions among the resource units included in the at least one time domain resource. For example, the multiple resource units can be the first K, last K, or middle K consecutive resource units among the resource units included in the at least one time domain resource. K is a positive integer, or K can be determined based on the first information. For example, K is positively correlated with the number of identifiers of devices that can use the at least one time domain resource, or K is positively correlated with the number of identifiers of the device group that can use the at least one time domain resource.

[0176] It is worth noting that this application does not limit the specific implementation method of the first information.

[0177] For example, the first information may include at least one of the following:

[0178] TXOP information: indicating the duration and / or end time of the TXOP (e.g., at least one time domain resource or target time domain resource mentioned above);

[0179] Device ID or device group ID: indicates a zero-power device or device group using a TXOP (e.g., at least one time domain resource or target time domain resource mentioned above);

[0180] Service Period parameter: indicates the available time period or time window information of the zero-power device within the TXOP (eg, at least one time domain resource or target time domain resource mentioned above), such as service period (SP).

[0181] Grant information: used to allocate a TXOP or service period for the zero-power device to use;

[0182] Trigger information: used to start a SP.

[0183] In some embodiments, the information carried by the first signal further includes at least one of the following:

[0184] information indicating the at least one channel;

[0185] Information used to indicate the at least one time domain resource;

[0186] Information for dividing the at least one time domain resource;

[0187] The identifier of the first device.

[0188] Exemplarily, the information indicating the at least one channel may be an index of the at least one channel, or may be a frequency band or a frequency point where the at least one channel is located.

[0189] Exemplarily, the information indicating the at least one time domain resource may include division information of each time domain resource in the at least one time domain resource. When the at least one time domain resource is a plurality of time domain resources, the division information of the plurality of time domain resources may be the same, partially the same, or different from each other. This application does not impose any specific limitation on this. The division information of the resource unit may include at least one of the following: the number of resource unit divisions, the position of each resource unit, the length of each resource unit, the starting position of each resource unit, or the ending position of each resource unit. For example, as shown in FIG7 , the at least one time domain resource is 4 time domain resources, and each of the 4 time domain resources is equally divided into 6 resource units, indicating that the division information of the 4 time domain resources (e.g., the number of resource unit divisions) is the same, i.e., 6.

[0190] Of course, in other alternative embodiments, the information carried by the first signal may include any information that can be sent by the AP to the STA.

[0191] For example, the information sent by the AP to the STA includes but is not limited to:

[0192] Beacon information: including ZP BSS-related parameters and / or configurations;

[0193] BSS ID, compressed SSID or STA ID: indicates the ID information of the first device;

[0194] Acknowledgement (ACK) information: used to acknowledge the transmission of the second device (e.g., the zero-power device);

[0195] Paging information: used to indicate to the first device that there is cached data of the second device (e.g., a zero-power device) that needs to be sent;

[0196] Data: data sent by the first device to the zero-power device;

[0197] Synchronization information: such as timing synchronization function (TSF) information, used for time synchronization of the second device (such as the zero-power device).

[0198] Traffic indication map (TIM) information: used to indicate a second device (eg, a zero-power device) that has cached data on a first device.

[0199] In some embodiments, the first device sends the first signal to the second device via a physical layer air interface associated with the second device.

[0200] Exemplarily, the physical layer air interface associated with the second device can be a physical layer air interface related to zero-power communication, and its modulation method adopts a simple modulation and demodulation method, such as ASK, FSK, etc., and its coding adopts a simple coding scheme, such as repetition coding, Manchester coding, block coding, group coding, etc.

[0201] Of course, in other alternative embodiments, the first device may also be provided with other physical layer air interfaces. For example, the first device may also be provided with a physical layer air interface associated with AP or STA communication. For example, for the physical layer air interface associated with AP or STA communication, its modulation method may adopt OFDM modulation method, and its coding method may adopt FEC coding, etc. In other words, the first device may communicate with the zero-power device via the physical layer air interface associated with zero-power communication, and communicate with the AP, STA, and other relay nodes via the physical layer air interface associated with AP or STA communication.

[0202] In some embodiments, the channel where the target time domain resource is located is the same as or different from the channel used to carry the first signal.

[0203] Exemplarily, the second device determines the target time domain resource for its transmission based on the first information carried by the first signal. When 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 for receiving the first signal.

[0204] In some embodiments, the first signal is a power supply signal for powering 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.

[0205] Exemplarily, the first signal is both a power supply signal for powering the second device and a carrier signal for backscattering by the second device; or, the first signal is both a power supply signal for powering the second device and a carrier signal for backscattering by the second device.

[0206] Exemplarily, the zero-power terminal may perform backscatter communication based on a received trigger signal.

[0207] Exemplarily, the trigger signal may be used to schedule or trigger backscatter communication of the zero-power terminal. The trigger signal carries scheduling information of the network device, or the trigger signal is a scheduling signaling or scheduling signal sent by the network device.

[0208] It should be noted that the energy supply signal and the trigger signal can be one signal or two independent signals, and this application does not make any specific limitation on this.

[0209] For example, in a cellular network, since zero-power devices are not battery-powered, a power supply signal needs to be provided by the network device for the zero-power device to obtain energy, thereby performing the corresponding communication process. Among them, the signal for power supply (i.e., the power supply signal) and the signal for information transmission (i.e., the trigger signal) can be two signals or one signal. For another example, in RFID technology, the power supply signal and the trigger signal can be one signal, and in cellular passive Internet of Things technology, the power supply signal and the trigger signal can be two independent signals. These two signals may not be sent in the same frequency band. For example, the network device continuously or intermittently sends a power supply signal in a certain frequency band, and the zero-power device performs energy collection. After the zero-power device obtains energy, it can perform the corresponding communication process, such as measurement, channel / signal reception, channel / signal transmission, etc.

[0210] In some embodiments, the method 200 may further include:

[0211] Receive a second signal sent by the second device.

[0212] In some embodiments, the first device receives the second signal sent by the second device through a physical layer air interface associated with the second device.

[0213] In some embodiments, the information carried by the second signal includes at least one of the following:

[0214] Respond to ACK information;

[0215] Trigger information, used to trigger the SP of the second device;

[0216] Polling information;

[0217] data.

[0218] Exemplarily, the response (ACK) information is used to respond to the transmission of the first device; the response information can be an authorization response (Grant Ack); the data (Data) can be data sent by the second device to the first device; the polling (Poll) information is used to request the first device to send cached data.

[0219] It is worth noting that, in addition to being sent to the first device, the second signal can also be sent to other devices communicating with it, such as other zero-power devices or other relay devices. In this case, the first device is not the device communicating with the second device, but merely the device that obtains the TXOP for the second device. In this case, the second signal can carry the address information of the receiving device, indicating the device ID of the device receiving the second signal.

[0220] The preferred embodiments of the present application are described in detail above in conjunction with the accompanying drawings. However, the present application is not limited to the specific details in the embodiments mentioned above. Within the technical concept of the present application, the technical solution of the present application can be subjected to a variety of simple modifications, and these simple modifications all fall within the scope of protection of the present application. For example, the various specific technical features described in the specific embodiments mentioned above can be combined in any suitable manner unless there is any contradiction. In order to avoid unnecessary repetition, the present application will not further explain various possible combinations. For another example, the various different embodiments of the present application can also be arbitrarily combined, and as long as they do not violate the ideas of the present application, they should also be regarded as the contents disclosed in the present application.

[0221] It should also be understood that in the various method embodiments of the present application, the size of the serial numbers of the processes involved above does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0222] The method embodiment of the present application is described in detail above in conjunction with Figures 1 to 7 , and the device embodiment of the present application is described in detail below in conjunction with Figures 8 to 11 .

[0223] FIG8 is a schematic block diagram of a first device 300 according to an embodiment of the present application.

[0224] As shown in FIG8 , the first device 300 may include:

[0225] The communication unit 310 is configured to obtain, through channel access of multiple channels, at least one time domain resource on at least one of the multiple channels, where the at least one time domain resource includes a target time domain resource corresponding to the second device.

[0226] 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.

[0227] In some embodiments, the communication unit 310 is further configured to:

[0228] sending a first signal to the second device;

[0229] The information carried by the first signal includes first information; the first information is used to indicate that the at least one time domain resource includes the target time domain resource, or the first information is used to indicate the target time domain resource.

[0230] In some embodiments, when the at least one time domain resource is divided into a plurality of resource units, the target time domain resource includes at least one resource unit among the plurality of resource units.

[0231] In some embodiments, the first information is used to indicate the at least one resource unit; and / or, the first information is used to indicate a device corresponding to each resource unit in the multiple resource units.

[0232] In some embodiments, the first bit in the first information is used to indicate whether the resource unit corresponding to a device other than the first device includes the resource unit associated with the first bit among the multiple resource units; or, the first bit is used to indicate whether the resource corresponding to the device associated with the first bit includes the resource unit associated with the first bit among the multiple resource units.

[0233] In some embodiments, the first information includes at least one of the following:

[0234] an identification of a device that can use the at least one time domain resource;

[0235] An identification of a group of devices that can use the at least one time-domain resource.

[0236] In some embodiments, the information carried by the first signal further includes at least one of the following:

[0237] information indicating the at least one channel;

[0238] Information used to indicate the at least one time domain resource;

[0239] Information for dividing the at least one time domain resource;

[0240] The identifier of the first device.

[0241] In some embodiments, the communication unit 310 is specifically configured to:

[0242] The first signal is sent to the second device through a physical layer air interface associated with the second device.

[0243] In some embodiments, the channel where the target time domain resource is located is the same as or different from the channel used to carry the first signal.

[0244] In some embodiments, the first signal is a power supply signal for powering 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.

[0245] In some embodiments, the communication unit 310 is further configured to:

[0246] Receive a second signal sent by the second device.

[0247] In some embodiments, the communication unit 310 is specifically configured to:

[0248] The second signal sent by the second device is received through the physical layer air interface associated with the second device.

[0249] In some embodiments, the information carried by the second signal includes at least one of the following:

[0250] Respond to ACK information;

[0251] Trigger information, used to trigger the SP of the second device;

[0252] Polling information;

[0253] data.

[0254] In some embodiments, the communication unit 310 is specifically configured to:

[0255] Determining a first parameter set used by the first device when performing channel access;

[0256] Based on the first parameter set, the at least one time domain resource is acquired through channel access of the multiple channels.

[0257] In some embodiments, the plurality of channels include a primary channel and at least one secondary channel; and the first parameter set includes at least one of the following:

[0258] The contention window CW parameter of the primary channel, the waiting time of the primary channel, and the waiting time of the secondary channel.

[0259] In some embodiments, the communication unit 310 is specifically configured to:

[0260] Performing channel sensing on the primary channel;

[0261] If the primary channel is idle, determining that the at least one time domain resource includes a time domain resource on the primary channel;

[0262] Performing channel sensing on the auxiliary channel within a waiting time of the auxiliary channel before a start time of the time domain resource on the primary channel;

[0263] If the secondary channel is idle, determining that the at least one time domain resource includes a time domain resource on the secondary channel.

[0264] In some embodiments, the communication unit 310 is specifically configured to:

[0265] Channel access is performed based on a set of parameters for each of the plurality of channels.

[0266] In some embodiments, the second device is a device that does not have channel access capability.

[0267] In some embodiments, the second device is a zero-power device.

[0268] In some embodiments, the first device is an access point device or a relay device.

[0269] It should be understood that the apparatus embodiments and the method embodiments may correspond to each other, and similar descriptions may refer to the method embodiments. Specifically, the first device 300 shown in FIG8 may correspond to the corresponding subject in the method 200 for executing the embodiment of the present application, and the aforementioned and other operations and / or functions of the various units in the first device 300 are respectively for implementing the corresponding processes in the various methods provided in the embodiment of the present application. For the sake of brevity, they are not further described here.

[0270] FIG9 is a schematic block diagram of a second device 400 according to an embodiment of the present application.

[0271] As shown in FIG9 , the second device 400 may include:

[0272] The communication unit 410 is configured to receive a first signal sent by a first device;

[0273] The information carried by the first signal includes first information; the first information is used for the first device to obtain at least one time domain resource on at least one channel among the multiple channels through channel access of multiple channels, including the target time domain resource corresponding to the second device, or the first information is used to indicate the target time domain resource.

[0274] 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.

[0275] In some embodiments, when the at least one time domain resource is divided into a plurality of resource units, the target time domain resource includes at least one resource unit among the plurality of resource units.

[0276] In some embodiments, the first information is used to indicate the at least one resource unit; and / or, the first information is used to indicate a device corresponding to each resource unit in the multiple resource units.

[0277] In some embodiments, the first bit in the first information is used to indicate whether the resource unit corresponding to a device other than the first device includes the resource unit associated with the first bit among the multiple resource units; or, the first bit is used to indicate whether the resource corresponding to the device associated with the first bit includes the resource unit associated with the first bit among the multiple resource units.

[0278] In some embodiments, the first information includes at least one of the following:

[0279] an identification of a device that can use the at least one time domain resource;

[0280] An identification of a group of devices that can use the at least one time-domain resource.

[0281] In some embodiments, the information carried by the first signal further includes at least one of the following:

[0282] information indicating the at least one channel;

[0283] Information used to indicate the at least one time domain resource;

[0284] Information for dividing the at least one time domain resource;

[0285] The identifier of the first device.

[0286] In some embodiments, the channel where the target time domain resource is located is the same as or different from the channel used to carry the first signal.

[0287] In some embodiments, the first signal is a power supply signal for powering 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.

[0288] In some embodiments, the communication unit 410 is further configured to:

[0289] A second signal is sent to the first device.

[0290] In some embodiments, the information carried by the second signal includes at least one of the following:

[0291] Respond to ACK information;

[0292] Trigger information, used to trigger the SP of the second device;

[0293] Polling information;

[0294] data.

[0295] In some embodiments, the second device is a device that does not have channel access capability.

[0296] In some embodiments, the second device is a zero-power device.

[0297] In some embodiments, the first device is an access point device or a relay device.

[0298] It should be understood that the device embodiment and the method embodiment may correspond to each other, and similar descriptions may refer to the method embodiment. Specifically, the second device 400 shown in Figure 9 may correspond to the corresponding subject in the method 200 of the embodiment of the present application, and the aforementioned and other operations and / or functions of each unit in the second device 400 are respectively for implementing the corresponding processes in each method provided in the embodiment of the present application. For the sake of brevity, they are not repeated here.

[0299] The communication device of the embodiment of the present application is described above from the perspective of functional modules in conjunction with the accompanying drawings. It should be understood that the functional module can be implemented in hardware form, can be implemented by instructions in software form, or can be implemented by a combination of hardware and software modules. Specifically, the steps of the method embodiment in the embodiment of the present application can be completed by the hardware integrated logic circuit and / or software form instructions in the processor, and the steps of the method disclosed in the embodiment of the present application can be directly embodied as a hardware decoding processor for execution, or can be completed by a combination of hardware and software modules in the decoding processor. Optionally, the software module can be located in a mature storage medium in the art such as random access memory, flash memory, read-only memory, programmable read-only memory, electrically erasable programmable memory, registers, etc. The storage medium is located in the memory, and the processor reads the information in the memory and completes the steps in the method embodiment mentioned above in conjunction with its hardware.

[0300] For example, the communication unit mentioned above may be implemented by a transceiver.

[0301] FIG10 is a schematic structural diagram of a communication device 500 according to an embodiment of the present application.

[0302] As shown in FIG. 10 , the communication device 500 may include a processor 510 .

[0303] The processor 510 may call and execute a computer program from the memory to implement the method in the embodiment of the present application.

[0304] As shown in FIG. 10 , the communication device 500 may further include a memory 520 .

[0305] The memory 520 can be used to store information and can also be used to store code, instructions, etc. executed by the processor 510. The processor 510 can call and run computer programs from the memory 520 to implement the methods in the embodiments of the present application. The memory 520 can be a separate device independent of the processor 510 or integrated into the processor 510.

[0306] As shown in FIG. 10 , the communication device 500 may further include a transceiver 530 .

[0307] The processor 510 may control the transceiver 530 to communicate with other devices. Specifically, the processor 510 may send information or data to other devices or receive information or data sent by other devices. The transceiver 530 may include a transmitter and a receiver. The transceiver 530 may further include one or more antennas.

[0308] It should be understood that the various components in the communication device 500 are connected via a bus system. In addition to the data bus, the bus system also includes a power bus, a control bus, and a status signal bus. It should also be understood that the communication device 500 can be the first device or the second device in the embodiments of the present application, and that the communication device 500 can implement the corresponding processes implemented by the first device or the second device in the various methods of the embodiments of the present application. For the sake of brevity, these details are not further described here.

[0309] In addition, a chip is also provided in an embodiment of the present application.

[0310] For example, the chip may be an integrated circuit chip with signal processing capabilities that can implement or execute the various methods, steps, and logic block diagrams disclosed in the embodiments of this application. The chip may also be referred to as a system-on-chip, a system-on-chip, a system-on-chip, or a system-on-chip chip. Optionally, the chip can be applied to various communication devices, so that the communication devices equipped with the chip can execute the various methods, steps, and logic block diagrams disclosed in the embodiments of this application.

[0311] FIG11 is a schematic structural diagram of a chip 600 according to an embodiment of the present application.

[0312] As shown in FIG. 11 , the chip 600 includes a processor 610 .

[0313] The processor 610 may call and execute a computer program from the memory to implement the method in the embodiment of the present application.

[0314] As shown in FIG. 11 , the chip 600 may further include a memory 620 .

[0315] The processor 610 can call and execute a computer program from the memory 620 to implement the method in the embodiment of the present application. The memory 620 can be used to store instruction information and can also be used to store code, instructions, etc. executed by the processor 610. The memory 620 can be a separate device independent of the processor 610 or integrated into the processor 610.

[0316] As shown in FIG. 11 , the chip 600 may further include an input interface 630 .

[0317] The processor 610 may control the input interface 630 to communicate with other devices or chips, and specifically, may obtain information or data sent by other devices or chips.

[0318] As shown in FIG. 11 , the chip 600 may further include an output interface 640 .

[0319] The processor 610 may control the output interface 640 to communicate with other devices or chips, and specifically, may output information or data to other devices or chips.

[0320] It should be understood that the various components in chip 600 are connected via a bus system, wherein the bus system includes, in addition to a data bus, a power bus, a control bus, and a status signal bus. It should also be understood that chip 600 can be applied to the first device or the second device in the embodiments of the present application, and that the chip can implement the corresponding processes implemented by the first device or the second device in the various methods of the embodiments of the present application. For the sake of brevity, this will not be further described here.

[0321] The processors mentioned above may include but are not limited to:

[0322] General-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field-programmable gate arrays (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc.

[0323] The processor can be used to implement or execute the various methods, steps, and logic block diagrams disclosed in the embodiments of the present application. The steps of the methods disclosed in the embodiments of the present application can be directly embodied as being executed by a hardware decoding processor, or can be executed by a combination of hardware and software modules in the decoding processor. The software module can be located in a storage medium mature in the art, such as a random access memory, a flash memory, a read-only memory, a programmable read-only memory, or an erasable programmable memory, a register, etc. The storage medium is located in the memory, and the processor reads the information in the memory and completes the steps of the method involved above in combination with its hardware.

[0324] The memories mentioned above include but are not limited to:

[0325] Volatile memory and / or non-volatile memory. Non-volatile memory can be read-only memory (ROM), programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), electrically erasable programmable read-only memory (EEPROM), or flash memory. Volatile memory can be random access memory (RAM), which is used as an external cache. By way of example and not limitation, many forms of RAM are available, such as static random access memory (SRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (SDRAM), double data rate synchronous dynamic random access memory (DDR SDRAM), enhanced synchronous dynamic random access memory (ESDRAM), synchronous link DRAM (SLDRAM), and direct RAM bus random access memory (DR RAM).

[0326] It should be noted that the memory described herein is intended to encompass these and any other suitable types of memory.

[0327] A computer-readable storage medium is also provided in an embodiment of the present application for storing a computer program. The computer-readable storage medium stores one or more programs, and the one or more programs include instructions that, when executed by a portable electronic device including multiple application programs, enable the portable electronic device to perform the wireless communication method provided in the present application. The computer-readable storage medium can be applied to the first device in the embodiment of the present application, and the computer program causes the computer to execute the corresponding process implemented by the first device in each method of the embodiment of the present application. The computer-readable storage medium can be applied to the second device in the embodiment of the present application, and the computer program causes the computer to execute the corresponding process implemented by the second device in each method of the embodiment of the present application.

[0328] The present application also provides a computer program product, including a computer program. This computer program product can be applied to a first device in the present application, and the computer program causes a computer to execute the corresponding processes implemented by the first device in the various methods of the present application. This computer program product can be applied to a second device in the present application, and the computer program causes a computer to execute the corresponding processes implemented by the second device in the various methods of the present application.

[0329] A computer program is also provided in an embodiment of the present application. When the computer program is executed by a computer, the computer can perform the wireless communication method provided in the present application. The computer program can be applied to the first device in the embodiment of the present application. When the computer program is run on the computer, the computer can perform the corresponding process implemented by the first device in each method of the embodiment of the present application. The computer program can be applied to the second device in the embodiment of the present application. When the computer program is run on the computer, the computer can perform the corresponding process implemented by the second device in each method of the embodiment of the present application.

[0330] The present application also provides a communication system, which may include the first device and the second device mentioned above. For the sake of brevity, they are not described here. It should be noted that the term "system" in this article may also be referred to as "network management architecture" or "network system".

[0331] It is worth noting that the terms used in the embodiments of the present application and the appended claims are for the purpose of describing specific embodiments only and are not intended to limit the embodiments of the present application. For example, the singular forms "a," "the," "above," and "the" used in the embodiments of the present application and the appended claims are intended to include the plural forms, unless the context clearly indicates otherwise.

[0332] Those skilled in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of the embodiments of the present application. If implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the embodiment of the present application is essentially or in other words, the part that contributes to the prior art or the part of the technical solution can be embodied in the form of a software product, which is stored in a storage medium and includes several instructions for causing a computer device (which can be a personal computer, server, or network device, etc.) to execute all or part of the steps of the method described in the embodiment of the present application. The aforementioned storage medium includes various media that can store program code, such as a USB flash drive, a mobile hard disk, a read-only memory, a random access memory, a magnetic disk, or an optical disk.

[0333] Those skilled in the art will also appreciate that, for ease of description and brevity, the specific operating processes of the systems, devices, and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here. In the several embodiments provided in this application, it should be understood that the disclosed systems, devices, and methods can be implemented in other ways. For example, the division of units, modules, or components in the device embodiments described above is merely a logical functional division, and in actual implementation, other division methods may be used. For example, multiple units, modules, or components may be combined or integrated into another system, or some units, modules, or components may be ignored or not executed. For another example, the units, modules, or components described above as separate / displayed components may or may not be physically separate, i.e., they may be located in one place or distributed across multiple network units. Some or all of the units, modules, or components may be selected according to actual needs to achieve the objectives of the embodiments of this application. Finally, it should be noted that the mutual coupling, direct coupling, or communication connection shown or discussed above may be through some interface, indirect coupling, or communication connection of devices or units, and may be electrical, mechanical, or other forms.

[0334] The above content is only a specific implementation of the embodiment of the present application, but the scope of protection of the embodiment of the present application is not limited to this. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed in the embodiment of the present application, and they should be included in the scope of protection of the embodiment of the present application. Therefore, the scope of protection of the embodiment of the present application should be based on the scope of protection of the claims.

Claims

1. A wireless communication method, characterized in that: The method is applicable to a first device, and the method includes: At least one time domain resource on at least one channel among the multiple channels is acquired through channel access of the multiple channels, and the at least one time domain resource includes a target time domain resource corresponding to the second device.

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

3. The method according to claim 1 or 2, characterized in that: The method further comprises: sending a first signal to the second device; The information carried by the first signal includes first information; the first information is used to indicate that the at least one time domain resource includes the target time domain resource, or the first information is used to indicate the target time domain resource.

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

5. The method according to claim 4, characterized in that The first information is used to indicate the at least one resource unit; and / or, the first information is used to indicate a device corresponding to each resource unit in the multiple resource units.

6. The method according to claim 4, characterized in that The first bit in the first information is used to indicate whether the resource unit corresponding to a device other than the first device includes the resource unit associated with the first bit among the multiple resource units; or, the first bit is used to indicate whether the resource corresponding to the device associated with the first bit includes the resource unit associated with the first bit among the multiple resource units.

7. The method according to claim 3, characterized in that The first information includes at least one of the following: an identification of a device that can use the at least one time domain resource; An identification of a group of devices that can use the at least one time domain resource.

8. The method according to any one of claims 3 to 7, characterized in that The information carried by the first signal also includes at least one of the following: Information indicating the at least one channel; Information used to indicate the at least one time domain resource; information for dividing the at least one time domain resource; The identifier of the first device.

9. The method according to any one of claims 3 to 8, characterized in that The sending a first signal to the second device includes: The first signal is sent to the second device via a physical layer air interface associated with the second device.

10. The method according to any one of claims 3 to 9, characterized in that The channel where the target time domain resource is located is the same as or different from the channel used to carry the first signal.

11. The method according to any one of claims 3 to 10, characterized in that The first signal is a power supply signal for supplying power to the second device, or the first signal is a carrier signal for the second device to perform backscattering, or the first signal includes a carrier signal for the second device to perform backscattering.

12. The method according to any one of claims 1 to 11, characterized in that The method further comprises: Receive a second signal sent by the second device.

13. The method according to claim 12, characterized in that The receiving a second signal sent by the second device includes: The second signal sent by the second device is received through a physical layer air interface associated with the second device.

14. The method according to claim 12 or 13, characterized in that The information carried by the second signal includes at least one of the following: Respond to ACK information; Trigger information, used to trigger the SP of the second device; Polling information; data.

15. The method according to any one of claims 1 to 14, characterized in that The acquiring, through channel access of multiple channels, at least one time domain resource on at least one channel among the multiple channels comprises: Determining a first parameter set used by the first device when performing channel access; Based on the first parameter set, the at least one time domain resource is acquired through channel access of the multiple channels.

16. The method according to claim 15, characterized in that The plurality of channels include a primary channel and at least one secondary channel; and the first parameter set includes at least one of the following: The contention window CW parameter of the main channel, the waiting time of the main channel, and the waiting time of the auxiliary channel.

17. The method according to claim 16, characterized in that The acquiring the at least one time domain resource through channel access of the multiple channels based on the first parameter set includes: Performing channel sensing on the main channel; If the primary channel is idle, determining that the at least one time domain resource includes a time domain resource on the primary channel; Performing channel sensing on the auxiliary channel within a waiting time of the auxiliary channel before a start time of the time domain resource on the primary channel; If the secondary channel is idle, determining that the at least one time domain resource includes a time domain resource on the secondary channel.

18. The method according to claim 15, characterized in that The acquiring the at least one time domain resource through channel access of the multiple channels based on the first parameter set includes: Channel access is performed based on a set of parameters for each of the plurality of channels.

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

20. The method according to claim 19, characterized in that The second device is a zero-power consumption device.

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

22. A wireless communication method, characterized in that: The method is applicable to a second device, and the method includes: receiving a first signal sent by a first device; Among them, the information carried by the first signal includes first information; the first information is used for the first device to obtain at least one time domain resource on at least one channel among the multiple channels through channel access of multiple channels, including the target time domain resource corresponding to the second device, or the first information is used to indicate the target time domain resource.

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

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

25. The method according to claim 24, characterized in that The first information is used to indicate the at least one resource unit; and / or, the first information is used to indicate a device corresponding to each resource unit in the multiple resource units.

26. The method according to claim 24, characterized in that The first bit in the first information is used to indicate whether the resource unit corresponding to a device other than the first device includes the resource unit associated with the first bit among the multiple resource units; or, the first bit is used to indicate whether the resource corresponding to the device associated with the first bit includes the resource unit associated with the first bit among the multiple resource units.

27. The method according to claim 22 or 23, characterized in that The first information includes at least one of the following: an identification of a device that can use the at least one time domain resource; An identification of a group of devices that can use the at least one time domain resource.

28. The method according to any one of claims 22 to 27, characterized in that The information carried by the first signal also includes at least one of the following: Information indicating the at least one channel; Information used to indicate the at least one time domain resource; information for dividing the at least one time domain resource; The identifier of the first device.

29. The method according to any one of claims 22 to 28, characterized in that The channel where the target time domain resource is located is the same as or different from the channel used to carry the first signal.

30. The method according to any one of claims 22 to 29, characterized in that The first signal is a power supply signal for supplying power to the second device, or the first signal is a carrier signal for the second device to perform backscattering, or the first signal includes a carrier signal for the second device to perform backscattering.

31. The method according to any one of claims 22 to 30, characterized in that The method further comprises: A second signal is sent to the first device.

32. The method according to claim 31, characterized in that The information carried by the second signal includes at least one of the following: Respond to ACK information; Trigger information, used to trigger the SP of the second device; Polling information; data.

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

34. The method according to claim 33, characterized in that The second device is a zero-power consumption device.

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

36. A wireless communication method, characterized in that: The method is applicable to a first device, and the method includes: A communication unit is used to obtain at least one time domain resource on at least one channel among the multiple channels through channel access of the multiple channels, and the at least one time domain resource includes a target time domain resource corresponding to the second device.

37. A second device, characterized in that: include: A communication unit, configured to receive a first signal sent by a first device; Among them, the information carried by the first signal includes first information; the first information is used for the first device to obtain at least one time domain resource on at least one channel among the multiple channels through channel access of multiple channels, including the target time domain resource corresponding to the second device, or the first information is used to indicate the target time domain resource.

38. A first device, characterized in that: include: A transceiver, a processor and a memory, wherein the memory is used to store a computer program, and the processor is used to call and run the computer program stored in the memory, so that the transceiver performs the method according to any one of claims 1 to 21.

39. A second device, characterized in that: include: A transceiver, a processor and a memory, wherein the memory is used to store a computer program, and the processor is used to call and run the computer program stored in the memory, so that the transceiver performs the method according to any one of claims 22 to 35.

40. A chip, characterized in that: include: A processor, configured to call and run a computer program from a memory, so that a device equipped with the chip executes a method according to any one of claims 1 to 21, or a method according to any one of claims 22 to 35.

41. A computer-readable storage medium, characterized in that Used to store a computer program, which, 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.

42. A computer program product, characterized in that Comprising computer program instructions which cause a computer to perform the method according to any one of claims 1 to 21, or the method according to any one of claims 22 to 35.

43. A computer program, characterized in that The computer program 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.

Images