Wireless communication method, terminal device and network device

Abstract

The invention discloses a wireless communication method, terminal equipment and network equipment. The method comprises the following steps: a first terminal device determines a first channel from a plurality of channels supported by a current cell according to first information; wherein the first information comprises one or more of the following: weight parameters of the plurality of channels; a first identifier associated with the first terminal device; the first terminal equipment belongs to a first channel group, the plurality of channels belong to a plurality of channel groups, and the first channel group is one of the plurality of channel groups; and first indication information sent by the network device, wherein the first indication information is used for indicating the first channel to the first terminal device. The introduction of the first information is helpful for the first terminal device to select an appropriate channel.

Description

Method, terminal device and network device for wireless communication Technical Field

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

[0002] In some common scenarios (such as zero-power communication), end devices cannot receive signals from network devices until they have enough energy. If the system is deployed with multiple channels, the end device cannot know which of the multiple channels the network device is preparing to use to communicate with the end device. Therefore, the question of which channel the end device should use to transmit and receive signals and interact with the network device remains unresolved.

[0003] Summary of the Invention

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

[0005] In a first aspect, a method for wireless communication is provided, comprising: a first terminal device determines a first channel from multiple channels supported by a current cell based on first information; wherein the first information includes one or more of the following: weight parameters of the multiple channels; a first identifier associated with the first terminal device; a first channel group to which the first terminal device belongs, wherein the multiple channels belong to multiple channel groups and the first channel group is one of the multiple channel groups; and first indication information sent by the network device, the first indication information being used to indicate the first channel to the first terminal device.

[0006] In a second aspect, a method for wireless communication is provided, comprising: a network device sends first information, the first information being used by a first terminal device to determine a first channel from a plurality of channels supported by a current cell, and the first information comprising one or more of the following: weight parameters of the plurality of channels; a first channel group to which the first terminal device belongs, wherein the plurality of channels belong to a plurality of channel groups, and the first channel group is one of the plurality of channel groups; and first indication information, being used to indicate the first channel to the first terminal device.

[0007] According to a third aspect, a terminal device is provided, which is a first terminal device, and the first terminal device includes: a determination module for determining a first channel from multiple channels supported by the current cell based on first information; wherein the first information includes one or more of the following: weight parameters of the multiple channels; a first identifier associated with the first terminal device; a first channel group to which the first terminal device belongs, wherein the multiple channels belong to multiple channel groups, and the first channel group is one of the multiple channel groups; and first indication information sent by the network device, the first indication information being used to indicate the first channel to the first terminal device.

[0008] In a fourth aspect, a network device is provided, including: a communication module for sending first information, wherein the first information is used by a first terminal device to determine a first channel from multiple channels supported by a current cell, and the first information includes one or more of the following: weight parameters of the multiple channels; a first channel group to which the first terminal device belongs, wherein the multiple channels belong to multiple channel groups, and the first channel group is one of the multiple channel groups; and first indication information for indicating the first channel to the first terminal device.

[0009] In a fifth aspect, a terminal device is provided, comprising a transceiver, a memory and a processor, wherein the memory is used to store programs, and the processor is used to call the programs in the memory and control the transceiver to receive or send signals so that the terminal device executes the method described in the first aspect.

[0010] In the sixth aspect, a network device is provided, comprising a transceiver, a memory and a processor, wherein the memory is used to store programs, and the processor is used to call the programs in the memory and control the transceiver to receive or send signals so that the network device executes the method described in the second aspect.

[0011] In a seventh aspect, a device is provided, comprising a processor for calling a program from a memory so that the device executes the method as described in the first aspect or the second aspect.

[0012] In an eighth aspect, a chip is provided, comprising a processor for calling a program from a memory so that a device equipped with the chip executes the method described in the first aspect or the second aspect.

[0013] In a ninth aspect, a computer-readable storage medium is provided, on which a program is stored, wherein the program enables a computer to execute the method as described in the first aspect or the second aspect.

[0014] In a tenth aspect, a computer program product is provided, characterized in that it includes a program, and the program enables a computer to execute the method described in the first aspect or the second aspect.

[0015] In an eleventh aspect, a computer program is provided, wherein the computer program enables a computer to execute the method as described in the first aspect or the second aspect.

[0016] Embodiments of the present application introduce first information for a first terminal device to determine a channel. This first information may include, for example, one or more of the following: weight parameters for multiple channels, a first identifier associated with the first terminal device, a first channel group to which the first terminal device belongs, and first indication information sent by a network device. The introduction of this first information helps the first terminal device select an appropriate channel. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] FIG1 is a diagram illustrating an example of a system architecture of a wireless communication system to which an embodiment of the present application may be applied.

[0018] FIG2 is a diagram showing an example of a system architecture of a zero-power communication system.

[0019] FIG3 is an example diagram of the energy harvesting process in zero-power communication.

[0020] FIG4 is an exemplary diagram of a backscatter communication process in zero-power communication.

[0021] FIG5 is an example diagram of a load modulation process of a zero-power terminal.

[0022] FIG6 is a schematic diagram of a non-return-to-zero (NRZ) encoding method.

[0023] FIG7 is a schematic diagram of a Manchester encoding method.

[0024] FIG8 is a schematic diagram of a coding method of unipolar return-to-zero coding.

[0025] FIG. 9 is a schematic diagram illustrating a differential binary phase (DBP) encoding method.

[0026] FIG10 is a schematic diagram of an encoding method of Miller encoding.

[0027] FIG11 is a schematic flowchart of a method for wireless communication provided by an embodiment of the present application.

[0028] FIG12 is an example diagram of a channel determination method provided in an embodiment of the present application.

[0029] FIG13 is another example diagram of the channel determination method provided in an embodiment of the present application.

[0030] FIG14 is another example diagram of the channel determination method provided in an embodiment of the present application.

[0031] FIG15 is another example diagram of the channel determination method provided in an embodiment of the present application.

[0032] FIG16 is a schematic flowchart of a method for wireless communication provided in another embodiment of the present application.

[0033] FIG17 is a schematic diagram of the structure of the terminal device provided in an embodiment of the present application.

[0034] Figure 18 is a structural diagram of the network device provided in an embodiment of the present application.

[0035] FIG19 is a schematic diagram of a device according to an embodiment of the present application. DETAILED DESCRIPTION

[0036] The technical solution in this application will be described below with reference to the accompanying drawings.

[0037] Wireless communication system

[0038] Figure 1 is a diagram illustrating an example of the system architecture of a wireless communication system 100 to which an embodiment of the present application may be applied. The wireless communication system 100 may include a network device 110 and a terminal device 120. The network device 110 may be a device that communicates with the terminal device 120. The network device 110 may provide network coverage for a specific geographical area and may communicate with the terminal device 120 located within the coverage area. The terminal device 120 may access a network (e.g., a wireless network) through the network device 110. Optionally, the wireless communication system 100 may also include other network entities such as a network controller and a mobility management entity, which is not limited in the embodiments of the present application.

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

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

[0041] The network device in the embodiment of the present application may be a device for communicating with a terminal device. The network device may be, for example, an access network device or a wireless access network device. For example, the network device may be a base station. The base station may broadly cover the following various names, or be replaced with the following names: NodeB, evolved NodeB (eNB), next generation NodeB (gNB), relay station, access point, transmission point (TRP), transmitting point (TP), home base station, network controller, access node, wireless node, access point (AP), transmission node, transceiver node, base band unit (BBU), remote radio unit (RRU), active antenna unit (AAU), remote radio head (RRH), central unit (CU), distributed unit (DU), positioning node, etc. The base station may be a macro base station, a micro base station, a relay node, a donor node or the like, or a combination thereof.

[0042] Terminal devices can communicate with each other via sidelinks. Sidelink communication can also be called proximity services (ProSe) communication, unilateral communication, sidelink communication, or device-to-device (D2D) communication.

[0043] Zero-power communication

[0044] Zero-power communication is a type of wireless communication technology. Zero-power communication can realize communication between network devices and terminal devices based on radio frequency power harvesting and backscatter communication technology. Referring to Figure 2, the zero-power communication network may include a network device 110 and a terminal device 120. In the zero-power communication network, the terminal device 120 may be referred to as a zero-power terminal. The network device 110 may be used to send a wireless power supply signal / downlink communication signal 130 to the zero-power terminal 120, and may receive a backscatter signal 140 from the zero-power terminal 120. The zero-power terminal 120 may include an energy harvesting module 121 and a backscatter communication module 122. In addition, the zero-power terminal 120 may also include a low-power computing module 123 and / or one or more memories or sensor modules 124. The one or more memories or sensor modules 124 may be used to store some basic information (such as item identification, etc.) or obtain sensor data such as ambient temperature and ambient humidity.

[0045] FIG3 shows a possible structure of the energy collection module 121. As shown in FIG3, the energy collection module 121 can collect the energy of the spatial electromagnetic waves of the radio frequency signal based on the principle of electromagnetic induction, and store the collected energy in the capacitor C. The above process can be understood as the charging process of the capacitor C. When the charging process of the capacitor C is completed, the capacitor C can start to discharge to provide energy for the zero-power terminal 120. For example, the discharge of the capacitor C can be used to drive the zero-power terminal 120 to perform low-power demodulation on the data sent by the network device 110. For another example, the discharge of the capacitor C can be used to drive the zero-power terminal 120 to modulate the data to be sent. For another example, the discharge of the capacitor C can be used to drive the sensor of the zero-power terminal 120 to collect data. For another example, the discharge of the capacitor C can be used to drive the zero-power terminal 120 to read data in the memory, etc.

[0046] The backscatter communication module 122 can be used for backscatter communication between the zero-power terminal 120 and the network device 110. The principle of backscatter communication is described below in conjunction with FIG4 . Referring to FIG4 , the zero-power terminal 120 receives a wireless signal 130 transmitted by the network device 110 and modulates the wireless signal 130 to carry the data to be transmitted. Finally, the zero-power terminal 120 radiates the modulated signal 140 from the antenna. This information transmission process is called backscatter communication. The wireless signal 130 can also be referred to as a carrier signal. A carrier signal can refer to an unmodulated wireless signal. For example, a carrier signal can be a sinusoidal wave signal. Backscatter communication and load modulation are closely related. The load modulation function can be understood as adjusting and controlling the circuit parameters of the oscillation circuit of the zero-power terminal 120 according to the rhythm of the data stream, thereby changing parameters such as the impedance of the zero-power terminal 120, thereby completing the modulation process.

[0047] In some implementations, the transmit (transmit, TX) path of the network device 110 may be further provided with other devices for processing the transmitted signal, such as an amplifier (AMP). The receive (receive, RX) path of the network device 110 may also be provided with other devices for processing the received signal, such as a low noise amplifier (LNA).

[0048] Typically, load modulation can be achieved through resistive load modulation and capacitive load modulation. Figure 5 shows a circuit diagram of a zero-power terminal based on resistive load modulation technology. It should be noted that the circuit shown in Figure 5 implements load modulation technology in a manner similar to that of existing circuits implementing load modulation technology. For the sake of simplicity, the functions of resistors R2 and R3, capacitors C1 and C2, and inductors L1 and L2 shown in Figure 5 are not further described.

[0049] In resistive load modulation, a resistor RL is connected in parallel with the load. A switch S can be controlled by a binary data stream to turn the resistor RL on or off. This switching of the resistor RL causes a change in the circuit voltage, which in turn controls the amplitude of the backscattered signal from the zero-power terminal, thereby modulating the backscattered signal using amplitude-shift keying (ASK).

[0050] Similarly, in capacitive load modulation, the on / off switching of the capacitor can be controlled based on a binary data stream to change the circuit resonant frequency, thereby changing the operating frequency of the backscattered signal to implement frequency-shift keying (FSK) modulation.

[0051] As mentioned above, a zero-power terminal can use load modulation to modulate the incoming signal (i.e., the carrier signal) to achieve backscatter communication. Therefore, zero-power terminals in backscatter communication generally have the following advantages.

[0052] Advantage 1: Since zero-power terminals do not need to actively transmit signals, they do not require complex RF pathways. For example, components such as power amplifiers (PAs) and RF filters can be omitted from the RF pathway, reducing the cost and size of the terminal device.

[0053] The second advantage is that since zero-power terminals do not need to actively generate high-frequency signals, they do not require high-frequency crystal oscillators, thereby reducing the cost and size of terminal equipment.

[0054] Advantage three: Since zero-power terminals can use backscatter technology to communicate with network devices, they consume less energy during communication and do not even need to consume their own energy.

[0055] Coding method of zero-power terminal

[0056] The data transmitted by the encoding end (such as a terminal or electronic tag) can use different encoding methods to represent binary "1" and "0". Correspondingly, the decoding end (such as a network device or wireless radio frequency identification system) can use the corresponding decoding method to decode the code stream sent by the encoding end. Commonly used encoding methods in zero-power communication technology include: NRZ encoding, Manchester encoding, unipolar return-to-zero (RZ) encoding, DBP encoding, Miller encoding, differential encoding, etc.

[0057] Figure 6 is a schematic diagram of the NRZ encoding method. Referring to Figure 6, it can be seen that in NRZ encoding, a high level is used to represent a binary "1" and a low level is used to represent a binary "0".

[0058] Figure 7 is a schematic diagram of the Manchester coding method. Manchester coding is also known as split-phase coding. Referring to Figure 7, in Manchester coding, the value of a bit is represented by the change in level (rising or falling) during half a bit period within the bit length. A negative transition during half a bit period represents a binary "1", and a positive transition during half a bit period represents a binary "0". In some implementations, Manchester coding is often used for data transmission from electronic tags to readers because it facilitates the detection of data transmission errors. This is because the "no change" state is not allowed within the bit length. When multiple electronic tags simultaneously transmit data bits with different values, the received rising and falling edges cancel each other out, resulting in an uninterrupted carrier signal throughout the entire bit length. Since this state is not allowed, the reader can use this error to determine the specific location where the collision occurred.

[0059] Figure 8 is a schematic diagram illustrating a unipolar return-to-zero (RRZ) encoding scheme. As shown in Figure 8 , a high level during the first half of a bit period represents a binary "1," while a low level signal throughout the entire bit period represents a binary "0." In some implementations, RRZ encoding can be used to extract a bit synchronization signal.

[0060] Figure 9 is a schematic diagram of the DBP encoding scheme. As shown in Figure 9, with differential biphase encoding, any edge within a half-bit period represents a binary "0," while the absence of an edge represents a binary "1." Furthermore, the voltage level is inverted at the beginning of each bit period. This makes it easier for the receiver to reconstruct the bit beat.

[0061] Figure 10 illustrates the Miller coding scheme. As shown in Figure 10, Miller coding uses any edge within half a bit period to represent a binary "1," while a constant level throughout the next bit period represents a binary "0." Because the level transition occurs at the beginning of a bit period, the bit beat is easily reconstructed by the receiver.

[0062] There is also a differential encoding method, in which each transmitted binary "1" causes a change in the signal level, while for a binary "0", the signal level remains unchanged.

[0063] Classification of zero-power terminals

[0064] Zero-power terminals can be divided into three categories based on energy storage capacity and whether they have the ability to generate RF signals for signal transmission. The first category can be called device A (Device A), the second category can be called device B (Device B), and the third category can be called device C (Device C).

[0065] Device A does not have energy storage capabilities, independent signal generation and amplification capabilities, and can only rely on backscatter communication to send signals.

[0066] Device B has energy storage capabilities, but cannot independently generate signals and can only transmit signals using backscattering. The energy stored in Device B can be used to amplify the reflected scattered signal.

[0067] Device C has an energy storage function. In addition, Device C can independently generate signals, that is, Device C can actively send signals.

[0068] In some common scenarios, end devices cannot receive signals from network devices before they have received energy. If the system is deployed with multiple channels, the end device cannot know which of the multiple channels the network device is preparing to communicate with the end device. Therefore, the question of which channel the end device should use to transmit and receive signals and thus interact with the network device remains unresolved.

[0069] For example, in a zero-power network, terminal devices may need to harvest energy from radio waves transmitted by network devices before they can operate. Therefore, before sourcing energy, the zero-power terminal is in a "shutdown" state, meaning it cannot receive signals from network devices. Therefore, when multiple channels are deployed in the system, the zero-power terminal, after activating itself through energy harvesting, can operate on any of the channels. However, network devices typically communicate with the zero-power terminal on only one of the channels. In this case, the question of which channel the zero-power terminal should use to transmit and receive signals and, therefore, to exchange information with network devices, remains unanswered.

[0070] In response to the above problems, the embodiment of the present application introduces first information, see step S1110 in Figure 11, and the first terminal device can determine the first channel from multiple channels based on the first information. The first information may include (or be used to indicate, or be used to determine) one or more of the following: weight parameters of multiple channels (see Example 1 below for details); the first identifier associated with the first terminal device (see Example 1, Example 2 or Example 4 below for details); the first channel group to which the first terminal device belongs (see Example 2 below for details); and the first indication information sent by the network device (see Example 3 below for details). The introduction of the first information helps to reduce the probability of collision of channels used by different terminal devices, thereby reducing interference between multiple terminal devices.

[0071] In some embodiments, before executing step S1110, the first terminal device may receive a trigger signal. Alternatively, the first terminal device may receive a trigger signal after executing step S1110. The trigger signal may be used to trigger the first terminal device to perform backscatter communication. The trigger signal may be, for example, a wireless power supply signal or a downlink communication signal.

[0072] In some embodiments, the first terminal device may refer to a zero-power terminal. The zero-power terminal may be one of Device A, Device B, or Device C mentioned in the section "Classification of Zero-Power Terminals". For example, a zero-power terminal may not have an energy storage function, and may not have independent signal generation and signal amplification functions, and may only rely on backscatter communication to send signals. For another example, a zero-power terminal may have an energy storage function, but may not be able to generate signals independently, and may only use backscattering to send signals. The energy stored in the zero-power terminal can be used to amplify the reflected scattered signal. For another example, the zero-power terminal can generate signals independently, that is, the zero-power terminal can actively send signals. As an example, the zero-power terminal may be a radio frequency identification (RFID) tag. Accordingly, the network device may be an RFID reader.

[0073] In some embodiments, the multiple channels may refer to multiple channels supported by the current cell of the first terminal device (the current cell mentioned in various embodiments of the present application may refer to or be replaced by the current serving cell). The current cell may also be referred to as a multi-channel cell.

[0074] In some embodiments, the multiple channels may be downlink channels or uplink channels.

[0075] In some embodiments, the multiple channels may include channels located in the frequency band (inband) and / or channels located in the guard band (guardband). Taking a zero-power terminal as an example, if the communication band of the zero-power terminal adopts an inband+guardband joint deployment, the multiple channels may include channels in the frequency band (or inband channels) and channels located in the guard band (or guardband channels).

[0076] In some embodiments, the number of communication resources (such as unicast communication resources) included in the multiple channels may be the same or different. In other words, the load capacity of the multiple channels may be the same or different.

[0077] In some embodiments, the number of the multiple channels may be a predefined value. Taking the first terminal device as a zero-power terminal as an example, the number of the multiple channels may be determined based on a spectrum supported by the zero-power terminal.

[0078] In some embodiments, the number of the multiple channels may be pre-stored by the first terminal device. Taking the first terminal device as a zero-power terminal as an example, the number of the multiple channels may be a value written into the tag after the zero-power terminal leaves the factory or is activated.

[0079] In some embodiments, the number of the plurality of channels may be notified to the first terminal device by the network device. For example, the network device may notify the terminal device of the number of the plurality of channels in a broadcast manner.

[0080] In some embodiments, the multiple channels may be divided based on frequency division. In this case, the multiple channels may be referred to as frequency division multiplexing (FDM) channels. For example, the current cell supports multiple channels, and the multiple channels correspond to different frequencies (or center frequencies). Furthermore, in some embodiments, the multiple channels may not overlap in the frequency domain.

[0081] In some embodiments, the multiple channels may be divided based on time division. In this case, the multiple channels may be referred to as time division multiplexing (TDM) channels. For example, the current cell supports multiple channels, and the multiple channels correspond to different time domain locations.

[0082] In some embodiments, the multiple channels may be divided based on code division or space division.

[0083] In some embodiments, the first channel can be used for communication between the first terminal device and the network device. For example, the first channel can be used for the first terminal device to monitor / receive a signal (in this case, the first channel is a downlink channel). In another example, the first channel can be used for the first terminal device to send a signal (in this case, the first channel is an uplink channel).

[0084] The first information mentioned above may be any type of information that can be used by the first terminal device to determine the first channel from multiple channels. The content of the first information is described in detail below with reference to multiple embodiments.

[0085] Example 1: The first information includes the weight parameters of the multiple channels

[0086] In some embodiments, the weight parameters of the multiple channels may also be referred to as weight factors of the multiple channels.

[0087] In some embodiments, the weight parameters of the multiple channels may be used to control the distribution ratio of terminal devices on the multiple channels. For example, a larger value of the weight parameter of a channel (or a larger weight factor) may indicate that a greater number of terminal devices can select the channel, or a greater number of terminal devices can be accommodated by the channel.

[0088] The first embodiment introduces weight parameters for multiple channels to take into account that the resource load conditions on different channels may be different. Taking zero-power communication as an example, in the case of inband + guardband joint deployment, the number of resources available for zero-power communication on the inband channel and the guard band channel may be different; or, if the system message is only sent on some of the multiple channels, the number of resources available for unicast communication on different channels may also be different. In this case, the channel determination method provided in the first embodiment helps network equipment to control the load distribution on different channels according to actual conditions.

[0089] In some embodiments, the weight parameters of the multiple channels may be values ​​pre-stored by the first terminal device. Taking the first terminal device as a zero-power terminal as an example, the weight parameters of the multiple channels may be values ​​written into the tag after the zero-power terminal leaves the factory or is activated.

[0090] In some embodiments, the weight parameters of the multiple channels may be predefined values. Taking the first terminal device as a zero-power terminal as an example, a value may be predefined for each channel in the spectrum supported by the zero-power terminal as the weight parameter of each channel.

[0091] In some embodiments, the values ​​of the weight parameters of the multiple channels may be notified to the first terminal device by the network device. For example, the network device may notify the terminal device of the weight parameters of the multiple channels in a broadcast manner.

[0092] In some embodiments, the first channel may be determined from the multiple channels based solely on the weight parameters of the multiple channels. For example, the channel with the largest weight parameter value may be determined as the first channel.

[0093] In some embodiments, the first channel may be determined based on weight parameters of the multiple channels and second information. The second information may include one or more of the following: a first identifier associated with the first terminal device; and the number of the multiple channels.

[0094] In some embodiments, the first identifier may include one or more of the following identifiers: a tag identifier (Tag ID) of the first terminal device; a service identifier (Service ID) of the first terminal device; and a group identifier (Group ID) of the terminal device group to which the first terminal device belongs.

[0095] For example, the first terminal device can be a zero-power device, and the first identifier can be the Tag ID of the tag of the zero-power device. The Tag ID can be an identifier written into the tag after the tag leaves the factory or is activated, or it can be a short number identifier that represents the tag.

[0096] For another example, the first terminal device may be a zero-power device, and the first identifier may be the Service ID of the tag of the zero-power device, and the Service ID may be an identifier written into the tag when the tag leaves the factory or is activated.

[0097] For another example, the first terminal device may be a zero-power device, and the first identifier may be the Group ID of the tag of the zero-power device, and the Group ID may be an identifier written into the tag before the tag leaves the factory or is activated.

[0098] In some embodiments, when determining the first channel based on the first identifier and the weight parameter, the type of the first identifier may be determined based on the type of trigger signal received by the first terminal device. The trigger signal mentioned herein may refer to a signal used to trigger the first terminal device to perform backscatter communication. For example, the trigger signal may be a wireless power supply signal or a downlink communication signal sent by a network device.

[0099] For example, if the trigger signal is a trigger signal for a single terminal device, the first identifier may be a Tag ID of the first terminal device.

[0100] For another example, if the trigger signal is a trigger signal for a service, the first identifier may be the Service ID of the first terminal device.

[0101] For another example, if the trigger signal is a trigger signal for a terminal device group, the first identifier may be a Group ID of the terminal device group to which the first terminal device belongs.

[0102] In some embodiments, the first channel may be determined based on the weight parameter, the second information, and the first rule.

[0103] In some embodiments, the first rule may be associated with a multiple access mode supported by the current cell.

[0104] In some embodiments, the first rule may be associated with a multiplexing mode supported by the current cell.

[0105] In some embodiments, the first rule may be associated with a multiple access method, a multiplexing method, or a partitioning method of the plurality of channels.

[0106] For example, if the current cell only supports the frequency division multiple access mode, the first rule is: select a channel based on the frequency division multiple access mode.

[0107] For another example, if the current cell only supports frequency division multiplexing, the first rule is: select a channel based on the frequency division multiplexing.

[0108] For another example, if multiple channels only support frequency division multiplexing, the first rule is: select a channel based on the frequency division multiplexing.

[0109] For another example, if the current cell supports FDMA and other multiple access modes, and FDMA takes priority, the first rule is: first select a channel based on FDMA, and then select a channel based on other multiple access modes.

[0110] For another example, if the current cell supports frequency division multiplexing and other multiplexing modes, and the frequency division multiplexing mode is prioritized, the first rule is: first select a channel based on the frequency division multiplexing mode, and then select a channel based on other multiplexing modes.

[0111] For another example, if multiple channels support frequency division multiplexing and other multiplexing modes, and the frequency division multiplexing mode is prioritized, the first rule is: first select a channel based on the frequency division multiplexing mode, and then select a channel based on other multiplexing modes.

[0112] For another example, if the current cell supports frequency division multiple access and other multiple access modes, and the other multiple access modes are prioritized, the first rule is: first select a channel based on the other multiple access modes, and then select a channel based on the frequency division multiple access mode.

[0113] For another example, if the current cell supports frequency division multiplexing and other multiplexing modes, and other multiplexing modes are prioritized, the first rule is: first select a channel based on other multiplexing modes, and then select a channel based on frequency division multiplexing.

[0114] For another example, if multiple channels support frequency division multiplexing and other multiplexing modes, and the other multiplexing modes are prioritized, the first rule is: select a channel based on the other multiplexing modes first, and then select a channel based on the frequency division multiplexing mode.

[0115] In some embodiments, the first rule is associated with a first identifier and a first parameter. The first parameter is the sum of the values ​​of weight parameters of multiple channels. In other words, the first channel is determined based on the first identifier and the first parameter.

[0116] In some embodiments, the first rule is associated with a quotient of a first identifier and a first parameter. The first parameter is the sum of values ​​of weight parameters of multiple channels. In other words, the first channel is determined based on the quotient of the first identifier and the first parameter.

[0117] To facilitate understanding, several more specific embodiments of determining the first channel based on weight parameters of multiple channels are given below.

[0118] Example 1.1:

[0119] In Example 1.1, the first terminal device first determines the first channel from multiple channels based on the Tag ID. Then, the first terminal device receives a trigger signal for a single terminal device on the first channel. Furthermore, in Example 1.1, the current cell only supports the channel selection method of frequency division multiplexing. Alternatively, the current cell supports a channel selection method that combines frequency division multiplexing and other multiplexing methods (such as time division multiplexing), and the channel selection method of frequency division multiplexing takes precedence. That is to say, when selecting a channel, frequency domain mapping is first performed based on the frequency division multiplexing method, and then other domains (such as time domain) mapping is performed based on other multiplexing methods. Furthermore, in Example 1.1, the current cell supports N channels, and the N channels correspond to different frequencies; the indexes of the N channels are numbered sequentially (for example, in order from low to high according to the corresponding frequencies), and are recorded as 0 to N-1.

[0120] The index of the first channel determined by the first terminal device from the plurality of channels is the minimum index n (0≤n <N):Tag ID mod W<W(0)+W(1)+…+W(n)。

[0121] In the above formula, W is the sum of the weight parameter values ​​corresponding to N channels, that is, W = W(0) + W(1) + ... + W(N-1), where W(n) represents the weight parameter value of the nth channel among the N channels. mod represents the remainder operation.

[0122] As a more specific example, assuming that the current cell only supports frequency division multiplexing, and the current cell supports 4 sub-channels in the frequency domain, the values ​​of the weight parameters corresponding to each sub-channel are: sub-channel 0 is 1, sub-channel 1 is 1, sub-channel 2 is 2, and sub-channel 3 is 3. The mapping relationship between the Tag ID of the first terminal device and the first channel determined by the first terminal device is shown in Figure 12.

[0123] Example 1.2:

[0124] In Example 1.2, the first terminal device first determines the first channel from multiple channels based on the Tag ID. Then, the first terminal device receives a trigger signal for a single terminal device on the first channel. Furthermore, in Example 1.2, the current cell supports a channel selection method that combines frequency division multiplexing and other multiplexing methods (such as time division multiplexing), and the channel selection method of other multiplexing methods takes precedence. That is to say, when selecting a channel, other domains (such as time domain) are first mapped based on other multiplexing methods, and then frequency domain mapping is performed based on the frequency division multiplexing method. In addition, before frequency domain mapping, the number of terminal devices that can be supported by mapping based on other multiplexing methods is M (or, the multiplexing factor of other multiplexing methods is M). Further, in Example 1.2, the current cell supports N channels, and the N channels correspond to different frequencies; the indexes of the N channels are numbered in sequence (for example, in order from low to high according to the corresponding frequencies), and are recorded as 0 to N-1.

[0125] The index of the first channel determined by the first terminal device from the plurality of channels is the minimum index n (0≤n <N):floor(Tag ID / M)mod W<W(0)+W(1)+…+W(n)。

[0126] In the above formula, W is the sum of the weight parameter values ​​corresponding to N channels, that is, W = W(0) + W(1) + … + W(N-1), where W(n) represents the weight parameter value of the nth channel among the N channels. mod represents the remainder operation. Floor represents the rounding down operation.

[0127] As a more specific example, the current cell supports two multiplexing modes: frequency division multiplexing and time division multiplexing. When selecting channels, channel selection based on frequency division multiplexing is performed first, and then channel selection based on time division multiplexing is performed, and the time domain multiplexing factor is 4. The current cell supports 4 channels in the frequency domain, and the values ​​of the weight parameters corresponding to the 4 channels are: subchannel 0 is 1, subchannel 1 is 1, subchannel 2 is 2, and subchannel 3 is 3. The mapping relationship between the Tag ID of the first terminal device and the first channel determined by the first terminal device is shown in Figure 13.

[0128] Example 1.3:

[0129] In Example 1.3, the first terminal device first determines the first channel from multiple channels based on the Service ID. Then, the first terminal device receives a trigger signal for a certain service on the first channel. Furthermore, in Example 1.3, the current cell only supports the channel selection method of frequency division multiplexing. Alternatively, the current cell supports a channel selection method that combines frequency division multiplexing and other multiplexing methods (such as time division multiplexing), and the channel selection method of frequency division multiplexing takes precedence. That is to say, when selecting a channel, frequency domain mapping is first performed based on the frequency division multiplexing method, and then other domains (such as time domain) mapping is performed based on other multiplexing methods. Furthermore, in Example 1.3, the current cell supports N channels, and the N channels correspond to different frequencies; the indexes of the N channels are numbered sequentially (for example, in order from low to high according to the corresponding frequencies), and are recorded as 0 to N-1.

[0130] The index of the first channel determined by the first terminal device from the plurality of channels is the minimum index n (0≤n <N):Service ID mod W<W(0)+W(1)+…+W(n)。

[0131] In the above formula, W is the sum of the weight parameter values ​​corresponding to N channels, that is, W = W(0) + W(1) + ... + W(N-1), where W(n) represents the weight parameter value of the nth channel among the N channels. mod represents the remainder operation.

[0132] Example 1.4

[0133] In Example 1.4, the first terminal device first determines the first channel from multiple channels based on the Service ID. Then, the first terminal device receives a trigger signal for a certain service on the first channel. Furthermore, in Example 1.4, the current cell supports a channel selection method that combines frequency division multiplexing and other multiplexing methods (such as time division multiplexing), and the channel selection method of other multiplexing methods takes precedence. That is to say, when selecting a channel, other domains (such as time domain) are mapped based on other multiplexing methods, and then frequency domain mapping is performed based on frequency division multiplexing. In addition, before frequency domain mapping, the number of terminal devices that can be supported by mapping based on other multiplexing methods is M (or, the multiplexing factor of other multiplexing methods is M). Further, in Example 1.4, the current cell supports N channels, and the N channels correspond to different frequencies; the indexes of the N channels are numbered in sequence (for example, in order from low to high according to the corresponding frequencies), and are recorded as 0 to N-1.

[0134] The index of the first channel determined by the first terminal device from the plurality of channels is the minimum index n (0≤n <N):floor(Service ID / M)mod W<W(0)+W(1)+…+W(n)。

[0135] In the above formula, W is the sum of the weight parameter values ​​corresponding to N channels, that is, W = W(0) + W(1) + … + W(N-1), where W(n) represents the weight parameter value of the nth channel among the N channels. mod represents the remainder operation. Floor represents the rounding down operation.

[0136] Example 1.5

[0137] In Example 1.5, the first terminal device first determines the first channel from multiple channels based on the Group ID. Then, the first terminal device receives a trigger signal for a terminal device group on the first channel. Furthermore, in Example 1.5, the current cell only supports the channel selection method of frequency division multiplexing. Alternatively, the current cell supports a channel selection method that combines frequency division multiplexing with other multiplexing methods (such as time division multiplexing), and the channel selection method of frequency division multiplexing takes precedence. That is to say, when selecting a channel, frequency domain mapping is first performed based on the frequency division multiplexing method, and then other domains (such as time domain) mapping is performed based on other multiplexing methods. Further, in Example 1.5, the current cell supports N channels, and the N channels correspond to different frequencies; the indexes of the N channels are numbered sequentially (for example, in order from low to high according to the corresponding frequencies), and are recorded as 0 to N-1.

[0138] The index of the first channel determined by the first terminal device from the plurality of channels is the minimum index n (0≤n <N):Group ID mod W<W(0)+W(1)+…+W(n)。

[0139] In the above formula, W is the sum of the values ​​of the weight parameters corresponding to N channels, that is, W = W(0) + W(1) + ... + W(N-1), where W(n) represents the nth channel among the N channels. mod represents the remainder operation.

[0140] Example 1.6

[0141] In Example 1.6, the first terminal device first determines the first channel from multiple channels based on the Group ID. Then, the first terminal device receives a trigger signal for a terminal device group on the first channel. Further, in Example 1.6, the current cell supports a channel selection method that combines frequency division multiplexing and other multiplexing methods (such as time division multiplexing), and the channel selection method of other multiplexing methods takes precedence. That is to say, when selecting a channel, other domains (such as time domain) are first mapped based on other multiplexing methods, and then frequency domain mapping is performed based on the frequency division multiplexing method. In addition, before frequency domain mapping, the number of terminal devices that can be supported by mapping based on other multiplexing methods is M (or, the multiplexing factor of other multiplexing methods is M). Further, in Example 1.6, the current cell supports N channels, and the N channels correspond to different frequencies; the indexes of the N channels are numbered in sequence (for example, in order from low to high according to the corresponding frequencies), and are recorded as 0 to N-1.

[0142] The index of the first channel determined by the first terminal device from the plurality of channels is the minimum index n (0≤n <N):floor(Group ID / M)mod W<W(0)+W(1)+…+W(n)。

[0143] In the above formula, W is the sum of the weight parameter values ​​corresponding to N channels, that is, W = W(0) + W(1) + … + W(N-1), where W(n) represents the weight parameter value of the nth channel among the N channels. mod represents the remainder operation. Floor represents the rounding down operation.

[0144] Example 2: The first information includes the first channel group to which the first terminal device belongs

[0145] The multiple channels supported by the current cell may belong to multiple channel groups. The first channel group may be one of the multiple channel groups. The first channel group may be selected by the first terminal device from the multiple channel groups. In other words, a two-stage channel selection mechanism may be introduced, where the first terminal device first selects the first channel group and then selects the first channel from the first channel group. The introduction of the two-stage channel selection mechanism allows different terminal devices to select channels (or subcarriers) with larger frequency domain spacing as much as possible, which helps reduce interference between different channels.

[0146] In some embodiments, multiple channels may be divided into multiple channel groups, where the number of channels included in each channel group may be equal or unequal.

[0147] In some embodiments, the mapping relationship between channels and channel groups may be configured by a network device. For example, the network device may explicitly indicate the mapping relationship between channels and channel groups in a broadcast manner.

[0148] In some embodiments, every K channels in the plurality of channels may be divided into a channel group. For example, every K consecutive channels in the frequency domain may be divided into a channel group in a certain order (e.g., in order from low to high frequency domain or from high to low frequency domain).

[0149] How to determine the first channel group from the plurality of channel groups is described in detail below.

[0150] In some embodiments, the first channel group is determined based on fourth information, and the fourth information includes one or more of the following information: a first identifier; and the number of channel groups included in the current cell.

[0151] In some embodiments, the first identifier includes one or more of the following: a Tag ID of the first terminal device; and a Service ID of the first terminal device.

[0152] In some embodiments, the first channel group is determined based on the fourth information and a third rule; the third rule is associated with a multiple access mode supported by the current cell.

[0153] In some embodiments, the first channel group is determined based on the fourth information and a third rule; the third rule is associated with a multiplexing mode supported by the current cell.

[0154] In some embodiments, the first channel group is determined based on the fourth information and a third rule; the third rule is associated with a multiple access method, a multiplexing method, or a division method of the plurality of channels.

[0155] For example, if the current cell only supports the frequency division multiple access mode, the third rule is: select a channel group based on the frequency division multiple access mode.

[0156] For another example, if the current cell only supports frequency division multiplexing, the third rule is: select a channel group based on the frequency division multiplexing.

[0157] For another example, if multiple channels only support frequency division multiplexing, the third rule is: select a channel group based on the frequency division multiplexing.

[0158] For another example, if the current cell supports frequency division multiple access and other multiple access modes, and the frequency division multiple access mode is prioritized, the third rule is: first select a channel group based on the frequency division multiple access mode, and then select a channel group based on other multiple access modes.

[0159] For another example, if the current cell supports frequency division multiplexing and other multiplexing modes, and the frequency division multiplexing mode is prioritized, the third rule is: first select the channel group based on the frequency division multiplexing mode, and then select the channel group based on other multiplexing modes.

[0160] For another example, if multiple channels support frequency division multiplexing and other multiplexing modes, and frequency division multiplexing takes priority, the third rule is: first select a channel group based on the frequency division multiplexing mode, and then select a channel group based on other multiplexing modes.

[0161] For another example, if the current cell supports frequency division multiple access and other multiple access modes, and other multiple access modes are prioritized, the third rule is: first select a channel group based on other multiple access modes, and then select a channel group based on frequency division multiple access.

[0162] For another example, if the current cell supports frequency division multiplexing and other multiplexing modes, and other multiplexing modes are prioritized, the third rule is: first select a channel group based on other multiplexing modes, and then select a channel group based on frequency division multiplexing.

[0163] For another example, if multiple channels support frequency division multiplexing and other multiplexing modes, and other multiplexing modes are prioritized, the third rule is: first select a channel group based on other multiplexing modes, and then select a channel group based on frequency division multiplexing.

[0164] To facilitate understanding, several more specific embodiments of determining the first channel from the first channel group are given below.

[0165] Example 2.1:

[0166] In Example 2.1, the multiple channel groups include L channel groups, and the indexes of the L channel groups are numbered in sequence (for example, in order of frequency from low to high) as follows: 0 to L-1. In addition, in Example 2.1, the first terminal device determines the first channel group based on the Tag ID. Furthermore, in Example 2.1, the current cell only supports the channel group selection method of frequency division multiplexing. Alternatively, the current cell supports a channel group selection method that combines frequency division multiplexing with other multiplexing methods (such as time division multiplexing), and the channel group selection method of frequency division multiplexing takes precedence. That is to say, when selecting a channel group, frequency domain mapping is first performed based on the frequency division multiplexing method, and then other domains (such as time domain) mapping are performed based on other multiplexing methods.

[0167] The index of the first channel group determined by the first terminal device from the plurality of channel groups satisfies the following condition or rule (corresponding to the third rule mentioned above): group index = Tag ID mod L. In the above formula, group index is the index of the first channel group. mod represents a remainder operation.

[0168] Example 2.2:

[0169] In Example 2.2, the multiple channel groups include L channel groups, and the indexes of the L channel groups are numbered in sequence (for example, in order of frequency from low to high) as follows: 0 to L-1. In addition, in Example 2.2, the first terminal device determines the first channel group based on the Tag ID. Furthermore, in Example 2.2, the current cell supports a channel group selection method that combines frequency division multiplexing and other multiplexing methods (such as time division multiplexing), and the channel group selection method of other multiplexing methods takes precedence. That is to say, when selecting a channel group, other domains (such as time domain) mapping is first performed based on other multiplexing methods, and then frequency domain mapping is performed based on frequency division multiplexing methods. In addition, before frequency domain mapping, the number of terminal devices that can be supported by mapping based on other multiplexing methods is M (or, the multiplexing factor of other multiplexing methods is M).

[0170] The index of the first channel group determined by the first terminal device from the plurality of channel groups satisfies the following condition or rule (corresponding to the third rule described above): group index = floor(Tag ID / M) mod L. In the above formula, group index is the index of the first channel group. mod represents a remainder operation. Floor represents a round-down operation.

[0171] Example 2.3:

[0172] In Example 2.3, the multiple channel groups include L channel groups, and the indexes of the L channel groups are numbered sequentially (for example, in order of frequency from low to high) as follows: 0 to L-1. In addition, in Example 2.3, the first terminal device determines the first channel group based on the Service ID. Furthermore, in Example 2.3, the current cell only supports the channel group selection method of frequency division multiplexing. Alternatively, the current cell supports a channel group selection method that combines frequency division multiplexing with other multiplexing methods (such as time division multiplexing), and the channel group selection method of frequency division multiplexing takes precedence. That is to say, when selecting a channel group, frequency domain mapping is first performed based on the frequency division multiplexing method, and then other domains (such as time domain) mapping are performed based on other multiplexing methods.

[0173] The index of the first channel group determined by the first terminal device from the plurality of channel groups satisfies the following condition or rule (corresponding to the third rule mentioned above): group index = Service ID mod L. In the above formula, group index is the index of the first channel group. mod represents a remainder operation.

[0174] Example 2.4:

[0175] In Example 2.4, the multiple channel groups include L channel groups, and the indexes of the L channel groups are numbered in sequence (for example, in order of frequency from low to high) as follows: 0 to L-1. In addition, in Example 2.4, the first terminal device determines the first channel group based on the Service ID. Furthermore, in Example 2.4, the current cell supports a channel group selection method that combines frequency division multiplexing and other multiplexing methods (such as time division multiplexing), and the channel group selection method of other multiplexing methods takes precedence. That is to say, when selecting a channel group, other domains (such as time domain) mapping is first performed based on other multiplexing methods, and then frequency domain mapping is performed based on frequency division multiplexing methods. In addition, before frequency domain mapping, the number of terminal devices that can be supported by mapping based on other multiplexing methods is M (or, the multiplexing factor of other multiplexing methods is M).

[0176] The index of the first channel group determined by the first terminal device from the plurality of channel groups satisfies the following condition or rule (corresponding to the third rule described above): group index = floor(Service ID / M) mod L. In the above formula, group index is the index of the first channel group. mod represents a remainder operation. Floor represents a round-down operation.

[0177] Example 2.5:

[0178] In some embodiments, the first channel group is determined based on mapping relationship information sent by the network device. The mapping relationship information can be used to indicate the mapping relationship between the first identifier and the first channel group. For example, the network device can indicate the mapping relationship between the first identifier and the first channel group to the first terminal device by broadcasting.

[0179] The foregoing describes in detail how to determine the first channel group from multiple channel groups. The following describes in detail how to determine the first channel from the first channel group in conjunction with an embodiment.

[0180] In some embodiments, the first channel may be determined based on the first channel group and third information, and the third information may include one or more of the following information: a first identifier; and the number of channels included in the first channel group.

[0181] In some embodiments, the first identifier includes one or more of the following: a Tag ID of the first terminal device; and a Service ID of the first terminal device.

[0182] In some embodiments, the first channel may be determined based on the first channel group, the third information, and a second rule; the second rule is associated with a multiple access mode supported by the current cell.

[0183] In some embodiments, the first channel may be determined based on the first channel group, the third information, and a second rule; the second rule is associated with a multiplexing mode supported by the current cell.

[0184] In some embodiments, the first channel may be determined based on the first channel group, the third information, and a second rule; the second rule is associated with a multiple access method, a multiplexing method, or a division method of the plurality of channels.

[0185] For example, if the current cell only supports the frequency division multiple access mode, the second rule is: select a channel based on the frequency division multiple access mode.

[0186] For another example, if the current cell only supports frequency division multiplexing, the second rule is: select a channel based on the frequency division multiplexing.

[0187] For another example, if multiple channels only support frequency division multiplexing, the second rule is: select a channel based on the frequency division multiplexing.

[0188] For another example, if the current cell supports frequency division multiple access and other multiple access modes, and the frequency division multiple access mode is prioritized, the second rule is: first select a channel based on the frequency division multiple access mode, and then select a channel based on other multiple access modes.

[0189] For another example, if the current cell supports frequency division multiplexing and other multiplexing modes, and the frequency division multiplexing mode is prioritized, the second rule is: first select a channel based on the frequency division multiplexing mode, and then select a channel based on other multiplexing modes.

[0190] For another example, if multiple channels support frequency division multiplexing and other multiplexing modes, and the frequency division multiplexing mode is prioritized, the second rule is: first select a channel based on the frequency division multiplexing mode, and then select a channel based on other multiplexing modes.

[0191] For another example, if the current cell supports frequency division multiple access and other multiple access modes, and the other multiple access modes are prioritized, the second rule is: first select a channel based on the other multiple access modes, and then select a channel based on the frequency division multiple access mode.

[0192] For another example, if the current cell supports frequency division multiplexing and other multiplexing modes, and other multiplexing modes are prioritized, the second rule is: first select a channel based on other multiplexing modes, and then select a channel based on frequency division multiplexing.

[0193] For another example, if multiple channels support frequency division multiplexing and other multiplexing modes, and the other multiplexing modes are prioritized, the second rule is: first select a channel based on the other multiplexing modes, and then select a channel based on the frequency division multiplexing mode.

[0194] To facilitate understanding, several more specific embodiments of determining the first channel from the first channel group are given below.

[0195] Example 2.6:

[0196] In Example 2.6, the first terminal device determines the first channel from the first channel group based on the Tag ID of the first terminal device. The first channel group includes K channels, and the indexes of the K channels are numbered in sequence (for example, in order from low to high frequency): 0 to K-1. In addition, in Example 2.6, the current cell only supports the channel selection method of frequency division multiplexing. Alternatively, the current cell supports a channel selection method that combines frequency division multiplexing and other multiplexing methods (such as time division multiplexing), and the channel selection method of frequency division multiplexing takes precedence. That is to say, when selecting a channel, frequency domain mapping is first performed based on the frequency division multiplexing method, and then other domains (such as time domain) mapping are performed based on other multiplexing methods.

[0197] In some implementations, the index of the first channel determined by the first terminal device from the first channel group is determined based on the following formula: Tag ID mod K, where mod represents a modulo operation.

[0198] In some implementations, if the index of the first channel group is determined based on the Tag ID of the first terminal device, the index of the first channel is determined based on the following formula: floor(Tag ID / L) mod K; if the index of the first channel group is not determined based on the Tag ID of the first terminal device, the index of the first channel is determined based on the following formula: Tag ID mod K. Wherein, floor represents a round-down operation, L represents the number of channel groups, and mod represents a remainder operation.

[0199] Example 2.7:

[0200] In Example 2.7, the first terminal device determines the first channel from the first channel group based on the Tag ID of the first terminal device. The first channel group includes K channels, and the indexes of the K channels are numbered in sequence (for example, in order from low to high frequency): 0 to K-1. In addition, in Example 2.7, the current cell supports a channel selection method that combines frequency division multiplexing and other multiplexing methods (such as time division multiplexing), and the channel selection method of other multiplexing methods takes precedence. That is to say, when selecting a channel, other domains (such as time domain) mapping is first performed based on other multiplexing methods, and then frequency domain mapping is performed based on frequency division multiplexing methods. In addition, before frequency domain mapping, the number of terminal devices that can be supported by mapping based on other multiplexing methods is M (or, the multiplexing factor of other multiplexing methods is M).

[0201] In some implementations, the index of the first channel determined by the first terminal device from the first channel group is determined based on the following formula: floor(Tag ID / M) mod K, where floor represents a round-down operation and mod represents a remainder operation.

[0202] In some implementations, if the index of the first channel group is determined based on the Tag ID of the first terminal device, the index of the first channel is determined based on the following formula: floor(floor(Tag ID / M) / L) mod K; if the index of the first channel group is not determined based on the Tag ID of the first terminal device, the index of the first channel is determined based on the following formula: floor(Tag ID / M) mod K. Wherein, floor represents a round-down operation, L represents the number of channel groups, and mod represents a remainder operation.

[0203] Example 2.8:

[0204] In Example 2.8, the first terminal device determines the first channel from the first channel group based on the Service ID of the first terminal device. The first channel group includes K channels, and the indexes of the K channels are numbered in sequence (for example, in order from low to high frequency): 0 to K-1. In addition, in Example 2.8, the current cell only supports the channel selection method of frequency division multiplexing. Alternatively, the current cell supports a channel selection method that combines frequency division multiplexing and other multiplexing methods (such as time division multiplexing), and the channel selection method of frequency division multiplexing takes precedence. That is to say, when selecting a channel, frequency domain mapping is first performed based on the frequency division multiplexing method, and then other domains (such as time domain) mapping are performed based on other multiplexing methods.

[0205] In some implementations, the index of the first channel determined by the first terminal device from the first channel group is determined based on the following formula: Service ID mod K, where mod represents a modulo operation.

[0206] In some implementations, if the index of the first channel group is determined based on the Service ID of the first terminal device, the index of the first channel is determined based on the following formula: floor(Service ID / L) mod K; if the index of the first channel group is not determined based on the Service ID of the first terminal device, the index of the first channel is determined based on the following formula: Service ID mod K. Wherein, floor represents a round-down operation, L represents the number of channel groups, and mod represents a remainder operation.

[0207] Example 2.9:

[0208] In Example 2.9, the first terminal device determines the first channel from the first channel group based on the Service ID of the first terminal device. The first channel group includes K channels, and the indexes of the K channels are numbered in sequence (for example, in order from low to high frequency): 0 to K-1. In addition, in Example 2.9, the current cell supports a channel selection method that combines frequency division multiplexing and other multiplexing methods (such as time division multiplexing), and the channel selection method of other multiplexing methods takes precedence. That is to say, when selecting a channel, other domains (such as time domain) mapping is first performed based on other multiplexing methods, and then frequency domain mapping is performed based on frequency division multiplexing. In addition, before frequency domain mapping, the number of terminal devices that can be supported by mapping based on other multiplexing methods is M (or, the multiplexing factor of other multiplexing methods is M).

[0209] In some implementations, the index of the first channel determined by the first terminal device from the first channel group is determined based on the following formula: floor(Service ID / M) mod K, where floor represents a round-down operation and mod represents a remainder operation.

[0210] In some implementations, if the index of the first channel group is determined based on the tag ID of the first terminal device, the index of the first channel is determined based on the following formula: floor(floor(Service ID / M) / L) mod K; if the index of the first channel group is not determined based on the tag ID of the first terminal device, the index of the first channel is determined based on the following formula: floor(Service ID / M) mod K. Wherein, floor represents a round-down operation, L represents the number of channel groups, and mod represents a remainder operation.

[0211] Two more specific examples are given below in conjunction with FIG. 14 and FIG. 15 .

[0212] For example, the current cell only supports frequency division multiplexing, and the current cell supports 4 channels in the frequency domain, where every 2 channels are divided into a channel group. In this case, the mapping relationship between the Tag ID of the first terminal device and the first channel can be as shown in Figure 14.

[0213] For another example, the current cell supports both frequency division multiplexing and time division multiplexing, and the current cell adopts a channel selection method that performs time division multiplexing first and then frequency division multiplexing. In addition, the time domain multiplexing factor of the current cell is 4, and the current cell supports 4 sub-channels in the frequency domain, where every 2 channels are divided into a channel group. In this case, the mapping relationship between the Tag ID of the first terminal device and the first channel can be as shown in Figure 15.

[0214] Example 3: The first information includes the first indication information sent by the network device

[0215] In some embodiments, the first indication information may be used to determine the first channel from a plurality of channels.

[0216] In some embodiments, the first indication information may be used to indicate a first channel to the first terminal device.

[0217] In some embodiments, the first indication information may be carried in dedicated signaling of the first terminal device. The dedicated signaling may be, for example, radio resource control (RRC) dedicated signaling, a medium access control control element (MAC CE), or a physical downlink control channel (PDCCH). By introducing terminal device dedicated signaling to configure the channel of the terminal device, the network device may be able to more flexibly control the channel used by a single terminal device.

[0218] Example 4: The first information includes a first identifier associated with the first terminal device

[0219] In some embodiments, the first identifier may include one or more of the following identifiers: a Tag ID of the first terminal device; a Service ID of the first terminal device; and a Group ID of a terminal device group to which the first terminal device belongs.

[0220] For example, the first terminal device can be a zero-power device, and the first identifier can be the Tag ID of the tag of the zero-power device. The Tag ID can be an identifier written into the tag after the tag leaves the factory or is activated, or it can be a short number identifier that represents the tag.

[0221] For another example, the first terminal device may be a zero-power device, and the first identifier may be the Service ID of the tag of the zero-power device, and the Service ID may be an identifier written into the tag when the tag leaves the factory or is activated.

[0222] For another example, the first terminal device may be a zero-power device, and the first identifier may be the Group ID of the tag of the zero-power device, and the Group ID may be an identifier written into the tag before the tag leaves the factory or is activated.

[0223] In some embodiments, the first channel may be determined from the plurality of channels based only on the first identifier. For example, a remainder of a quotient of the first identifier and the number of channels of the plurality of channels may be determined, and then the first channel may be determined from the plurality of channels based on the remainder.

[0224] In some embodiments, the first identifier and other information may be combined to determine the first channel from multiple channels. For example, the first identifier may be combined with the weight parameter described in Example 1 to determine the first channel from multiple channels. For a detailed description, see Example 1. For another example, the first identifier may be combined with the first channel group described in Example 2 to determine the first channel from multiple channels. For a detailed description, see Example 2.

[0225] In some embodiments, some or all of the first information mentioned above may be sent by a network device. For example, referring to FIG16 , in step S1610, the network device sends the first information. The first information may be used by the first terminal device to determine the first channel from multiple channels supported by the current cell. In some embodiments, the first information may include one or more of the following information: weight parameters of multiple channels; a first channel group to which the first terminal device belongs, wherein the multiple channels belong to multiple channel groups and the first channel group is one of the multiple channel groups; and first indication information for indicating the first channel to the first terminal device.

[0226] In some embodiments, the channels mentioned in the above embodiments may also be referred to as sub-channels.

[0227] The method embodiment of the present application is described in detail above in conjunction with Figures 1 to 16 , and the device embodiment of the present application is described in detail below in conjunction with Figures 17 to 19 . It should be understood that the description of the method embodiment corresponds to the description of the device embodiment, and therefore, for portions not described in detail, reference can be made to the above method embodiment.

[0228] Figure 17 is a structural diagram of a terminal device provided in an embodiment of the present application. The terminal device 1700 in Figure 17 may be the first terminal device mentioned above. The terminal device 1700 may include a determination module 1710. The determination module 1710 can be used to determine a first channel from a plurality of channels supported by the current cell based on first information; wherein, the first information includes one or more of the following: weight parameters of the plurality of channels; a first identifier associated with the first terminal device; a first channel group to which the first terminal device belongs, wherein the plurality of channels belong to a plurality of channel groups, and the first channel group is one of the plurality of channel groups; and first indication information sent by the network device, the first indication information being used to indicate the first channel to the first terminal device.

[0229] In some embodiments, the first channel is determined based on the weight parameter and second information, and the second information includes one or more of the following: the first identifier; and the number of the plurality of channels.

[0230] In some embodiments, the first identifier includes one or more of the following identifiers: a Tag ID of the first terminal device; a Service ID of the first terminal device; and a Group ID of a terminal device group to which the first terminal device belongs.

[0231] In some embodiments, the type of the first identifier is determined based on a type of a trigger signal, and the trigger signal is used to trigger the first terminal device to perform backscatter communication.

[0232] In some embodiments, if the trigger signal is a trigger signal for a single terminal device, the first identifier is the Tag ID of the first terminal device; or, if the trigger signal is a trigger signal for a service, the first identifier is the Service ID of the first terminal device; or, if the trigger signal is a trigger signal for a terminal device group, the first identifier is the Group ID of the terminal device group to which the first terminal device belongs.

[0233] In some embodiments, the first channel is determined based on the weight parameter, the second information and a first rule; the first rule is associated with a multiple access mode supported by the current cell.

[0234] In some embodiments, if the current cell only supports frequency division multiple access, the first rule is: select a channel based on the frequency division multiple access; or, if the current cell supports frequency division multiple access and other multiple access modes, and the frequency division multiple access mode takes precedence, the first rule is: first select a channel based on the frequency division multiple access, and then select a channel based on the other multiple access modes; or, if the current cell supports frequency division multiple access and other multiple access modes, and the other multiple access modes take precedence, the first rule is: first select a channel based on the other multiple access modes, and then select a channel based on the frequency division multiple access.

[0235] In some embodiments, the first channel is determined based on the first channel group and third information, and the third information includes one or more of the following information: the first identifier; and the number of channels included in the first channel group.

[0236] In some embodiments, the first channel is determined based on the first channel group, the third information and a second rule; and the second rule is associated with the multiple access mode supported by the current cell.

[0237] In some embodiments, if the current cell only supports frequency division multiple access, the second rule is: select a channel based on the frequency division multiple access; or, if the current cell supports frequency division multiple access and other multiple access modes, and the frequency division multiple access mode takes precedence, the second rule is: first select a channel based on the frequency division multiple access, and then select a channel based on the other multiple access modes; or, if the current cell supports frequency division multiple access and other multiple access modes, and the other multiple access modes take precedence, the second rule is: first select a channel based on the other multiple access modes, and then select a channel based on the frequency division multiple access.

[0238] In some embodiments, the first channel group is determined based on fourth information, and the fourth information includes one or more of the following information: the first identifier; and the number of channel groups included in the current cell.

[0239] In some embodiments, the first channel group is determined based on the fourth information and a third rule; the third rule is associated with a multiple access mode supported by the current cell.

[0240] In some embodiments, if the current cell only supports frequency division multiple access, the third rule is: select the channel group based on the frequency division multiple access; or, if the current cell supports frequency division multiple access and other multiple access modes, and the frequency division multiple access mode takes precedence, the third rule is: first select the channel group based on the frequency division multiple access, and then select the channel group based on the other multiple access modes; or, if the current cell supports frequency division multiple access and other multiple access modes, and the other multiple access modes take precedence, the third rule is: first select the channel group based on the other multiple access modes, and then select the channel group based on the frequency division multiple access.

[0241] In some embodiments, the first channel group is determined based on mapping relationship information sent by the network device, and the mapping relationship information is used to indicate a mapping relationship between the first identifier and the first channel group.

[0242] In some embodiments, the first identifier includes one or more of the following: a Tag ID of the first terminal device; and a Service ID of the first terminal device.

[0243] In some embodiments, the first indication information is carried in dedicated signaling of the terminal device.

[0244] In some embodiments, the first terminal device is a zero-power consumption terminal.

[0245] Figure 18 is a structural diagram of a network device provided in an embodiment of the present application. The network device 1800 in Figure 18 may include a communication module 1810. The communication module 1810 may be used to send first information, where the first information is used for a first terminal device to determine a first channel from a plurality of channels supported by a current cell, and the first information includes one or more of the following: weight parameters of the plurality of channels; a first channel group to which the first terminal device belongs, wherein the plurality of channels belong to a plurality of channel groups, and the first channel group is one of the plurality of channel groups; and first indication information for indicating the first channel to the first terminal device.

[0246] In some embodiments, the first channel is determined based on the weight parameter and second information, and the second information includes one or more of the following: a first identifier associated with the first terminal device; and the number of the multiple channels.

[0247] In some embodiments, the first identifier includes one or more of the following identifiers: a Tag ID of the first terminal device; a Service ID of the first terminal device; and a Group ID of a terminal device group to which the first terminal device belongs.

[0248] In some embodiments, the type of the first identifier is determined based on a type of a trigger signal, and the trigger signal is used to trigger the first terminal device to perform backscatter communication.

[0249] In some embodiments, if the trigger signal is a trigger signal for a single terminal device, the first identifier is the Tag ID of the first terminal device; or, if the trigger signal is a trigger signal for a service, the first identifier is the Service ID of the first terminal device; or, if the trigger signal is a trigger signal for a terminal device group, the first identifier is the Group ID of the terminal device group to which the first terminal device belongs.

[0250] In some embodiments, the first channel is determined based on the weight parameter, the second information and a first rule; the first rule is associated with a multiple access mode supported by the current cell.

[0251] In some embodiments, if the current cell only supports frequency division multiple access, the first rule is: select a channel based on the frequency division multiple access; or, if the current cell supports frequency division multiple access and other multiple access modes, and the frequency division multiple access mode takes precedence, the first rule is: first select a channel based on the frequency division multiple access, and then select a channel based on the other multiple access modes; or, if the current cell supports frequency division multiple access and other multiple access modes, and the other multiple access modes take precedence, the first rule is: first select a channel based on the other multiple access modes, and then select a channel based on the frequency division multiple access.

[0252] In some embodiments, the first channel is determined based on the first channel group and third information, and the third information includes one or more of the following information: a first identifier associated with the first terminal device; and the number of channels included in the first channel group.

[0253] In some embodiments, the first channel is determined based on the first channel group, the third information and a second rule; and the second rule is associated with the multiple access mode supported by the current cell.

[0254] In some embodiments, if the current cell only supports frequency division multiple access, the second rule is: select a channel based on the frequency division multiple access; or, if the current cell supports frequency division multiple access and other multiple access modes, and the frequency division multiple access mode takes precedence, the second rule is: first select a channel based on the frequency division multiple access, and then select a channel based on the other multiple access modes; or, if the current cell supports frequency division multiple access and other multiple access modes, and the other multiple access modes take precedence, the second rule is: first select a channel based on the other multiple access modes, and then select a channel based on the frequency division multiple access.

[0255] In some embodiments, the first channel group is determined based on fourth information, and the fourth information includes one or more of the following information: a first identifier associated with the first terminal device; and the number of channel groups included in the current cell.

[0256] In some embodiments, the first channel group is determined based on the fourth information and a third rule; the third rule is associated with a multiple access mode supported by the current cell.

[0257] In some embodiments, if the current cell only supports frequency division multiple access, the third rule is: select the channel group based on the frequency division multiple access; or, if the current cell supports frequency division multiple access and other multiple access modes, and the frequency division multiple access mode takes precedence, the third rule is: first select the channel group based on the frequency division multiple access, and then select the channel group based on the other multiple access modes; or, if the current cell supports frequency division multiple access and other multiple access modes, and the other multiple access modes take precedence, the third rule is: first select the channel group based on the other multiple access modes, and then select the channel group based on the frequency division multiple access.

[0258] In some embodiments, the first channel group is determined based on mapping relationship information sent by the network device, and the mapping relationship information is used to indicate a mapping relationship between the first identifier and the first channel group.

[0259] In some embodiments, the first identifier includes one or more of the following: a Tag ID of the first terminal device; and a Service ID of the first terminal device.

[0260] In some embodiments, the first indication information is carried in dedicated signaling of the terminal device.

[0261] In some embodiments, the first terminal device is a zero-power consumption terminal.

[0262] Figure 19 is a schematic block diagram of a communication device according to an embodiment of the present application. The dashed lines in Figure 19 indicate that the unit or module is optional. Device 1900 may be used to implement the method described in the above method embodiment. Device 1900 may be a chip, a terminal device, or a network device.

[0263] The device 1900 may include one or more processors 1910. The processor 1910 may support the device 1900 to implement the method described in the above method embodiment. The processor 1910 may be a general-purpose processor or a special-purpose processor. For example, the processor may be a central processing unit (CPU). Alternatively, the processor may be another general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic device, discrete hardware component, etc. The general-purpose processor may be a microprocessor or the processor may be any conventional processor, etc.

[0264] The apparatus 1900 may further include one or more memories 1920. The memories 1920 store programs that can be executed by the processor 1910, causing the processor 1910 to perform the methods described in the above method embodiments. The memories 1920 may be independent of the processor 1910 or integrated into the processor 1910.

[0265] The apparatus 1900 may further include a transceiver 1930. The processor 1910 may communicate with other devices or chips via the transceiver 1930. For example, the processor 1910 may transmit and receive data with other devices or chips via the transceiver 1930.

[0266] The present application also provides a computer-readable storage medium for storing a program. The computer-readable storage medium can be applied to a terminal device or network device provided in the present application, and the program enables a computer to execute the method performed by the terminal device or network device in each embodiment of the present application.

[0267] The present application also provides a computer program product. The computer program product includes a program. The computer program product can be applied to a terminal device or network device provided in the present application, and the program causes a computer to execute the method performed by the terminal device or network device in each embodiment of the present application.

[0268] The present application also provides a computer program that can be applied to a terminal device or network device provided in the present application, and enables a computer to execute the method performed by the terminal device or network device in each embodiment of the present application.

[0269] It should be understood that the terms "system" and "network" in this application can be used interchangeably. In addition, the terms used in this application are only used to explain the specific embodiments of this application and are not intended to limit this application. The terms "first", "second", "third", and "fourth" in the specification and claims of this application and the accompanying drawings are used to distinguish different objects rather than to describe a specific order. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions.

[0270] In the embodiments of this application, the term "indication" may refer to a direct indication, an indirect indication, or an indication of an association. For example, "A indicates B" may refer to a direct indication of B, e.g., B can obtain information through A; it may refer to an indirect indication of B, e.g., A indicates C, e.g., B can obtain information through C; or it may refer to an association between A and B.

[0271] In the embodiment of the present application, "B corresponding to A" means that B is associated with A and B can be determined based on A. However, it should be understood that determining B based on A does not mean determining B based solely on A, but B can also be determined based on A and / or other information.

[0272] In the embodiments of the present application, the term "corresponding" may indicate a direct or indirect correspondence between the two, or an association relationship between the two, or a relationship between indication and indication, configuration and configuration, etc.

[0273] In the embodiments of the present application, "pre-definition" or "pre-configuration" may be implemented by pre-storing corresponding codes, tables, or other methods that can be used to indicate relevant information in a device (e.g., a terminal device and a network device). The present application does not limit the specific implementation method. For example, pre-definition may refer to information defined in a protocol.

[0274] In the embodiments of the present application, the “protocol” may refer to a standard protocol in the communications field, for example, it may include an LTE protocol, an NR protocol, and related protocols used in future communication systems, and the present application does not limit this.

[0275] In the embodiments of this application, the term "and / or" is simply a description of the association relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this document generally indicates that the related objects are in an "or" relationship.

[0276] In various embodiments of the present application, the size of the serial numbers of the above-mentioned processes 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.

[0277] In the several embodiments provided in this application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the device embodiments described above are merely schematic. For example, the division of the units is merely a logical function division. In actual implementation, there may be other division methods, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0278] The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple network units. Some or all of these units may be selected to achieve the purpose of this embodiment according to actual needs.

[0279] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0280] In the above embodiments, it can be implemented in whole or in part by software, hardware, firmware or any combination thereof. When implemented using software, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the process or function described in the embodiment of the present application is generated in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions can be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer instructions can be transmitted from one website, computer, server or data center to another website, computer, server or data center via a wired (e.g., coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) method. The computer-readable storage medium can be any available medium that can be read by a computer or a data storage device such as a server or data center that includes one or more available media integrated therein. The available medium may be a magnetic medium (eg, a floppy disk, a hard disk, a magnetic tape), an optical medium (eg, a digital versatile disc (DVD)), or a semiconductor medium (eg, a solid state disk (SSD)).

[0281] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of this application. Therefore, the scope of protection of this application should be based on the scope of protection of the claims.

Claims

1. A method for wireless communication, characterized in that: include: The first terminal device determines the first channel from multiple channels supported by the current cell according to the first information; The first information includes one or more of the following: weight parameters of the plurality of channels; A first identifier associated with the first terminal device; a first channel group to which the first terminal device belongs, wherein the plurality of channels belong to a plurality of channel groups, and the first channel group is one of the plurality of channel groups; and The first indication information sent by the network device is used to indicate the first channel to the first terminal device.

2. The method according to claim 1, characterized in that The first channel is determined based on the weight parameter and second information, and the second information includes one or more of the following: the first identifier; and The number of the plurality of channels.

3. The method according to claim 2, characterized in that The first identifier includes one or more of the following identifiers: The label identification of the first terminal device; The service identifier of the first terminal device; and The group identifier of the terminal device group to which the first terminal device belongs.

4. The method according to claim 3, characterized in that: The type of the first identifier is determined based on the type of a trigger signal, and the trigger signal is used to trigger the first terminal device to perform backscatter communication.

5. The method according to claim 4, characterized in that: If the trigger signal is a trigger signal for a single terminal device, the first identifier is a tag identifier of the first terminal device; or, If the trigger signal is a trigger signal for a service, the first identifier is a service identifier of the first terminal device; or, If the trigger signal is a trigger signal for a terminal device group, the first identifier is a group identifier of the terminal device group to which the first terminal device belongs.

6. The method according to any one of claims 2 to 5, characterized in that: The first channel is determined based on the weight parameter, the second information and a first rule; the first rule is associated with a multiple access mode supported by the current cell.

7. The method according to claim 6, characterized in that: If the current cell only supports frequency division multiple access, the first rule is: selecting a channel based on the frequency division multiple access; or, If the current cell supports frequency division multiple access and other multiple access modes, and the frequency division multiple access mode is prioritized, the first rule is: first select a channel based on the frequency division multiple access mode, and then select a channel based on the other multiple access modes; or, If the current cell supports frequency division multiple access and other multiple access modes, and the other multiple access modes are prioritized, the first rule is: first select a channel based on the other multiple access modes, and then select a channel based on the frequency division multiple access mode.

8. The method according to claim 1, characterized in that The first channel is determined based on the first channel group and third information, and the third information includes one or more of the following information: the first identifier; and The number of channels included in the first channel group.

9. The method according to claim 8, characterized in that The first channel is determined based on the first channel group, the third information and a second rule; the second rule is associated with the multiple access mode supported by the current cell.

10. The method according to claim 9, characterized in that: If the current cell only supports frequency division multiple access, the second rule is: selecting a channel based on the frequency division multiple access; or, If the current cell supports frequency division multiple access and other multiple access modes, and the frequency division multiple access mode is prioritized, the second rule is: first select a channel based on the frequency division multiple access mode, and then select a channel based on the other multiple access modes; or, If the current cell supports frequency division multiple access and other multiple access modes, and the other multiple access modes are prioritized, the second rule is: first select a channel based on the other multiple access modes, and then select a channel based on the frequency division multiple access mode.

11. The method according to any one of claims 1 to 10, characterized in that The first channel group is determined based on fourth information, and the fourth information includes one or more of the following information: the first identifier; and The number of channel groups included in the current cell.

12. The method according to claim 11, characterized in that The first channel group is determined based on the fourth information and a third rule; the third rule is associated with the multiple access mode supported by the current cell.

13. The method according to claim 12, characterized in that: If the current cell only supports frequency division multiple access, the third rule is: selecting a channel group based on the frequency division multiple access; or, If the current cell supports frequency division multiple access mode and other multiple access modes, and the frequency division multiple access mode is prioritized, the third rule is: first select a channel group based on the frequency division multiple access mode, and then select a channel group based on the other multiple access modes; or, If the current cell supports frequency division multiple access and other multiple access modes, and the other multiple access modes are prioritized, the third rule is: first select a channel group based on the other multiple access modes, and then select a channel group based on the frequency division multiple access mode.

14. The method according to any one of claims 1 to 10, characterized in that The first channel group is determined based on mapping relationship information sent by a network device, and the mapping relationship information is used to indicate a mapping relationship between the first identifier and the first channel group.

15. The method according to any one of claims 8 to 14, characterized in that The first identifier includes one or more of the following: The label identification of the first terminal device; and The service identifier of the first terminal device.

16. The method according to claim 1, characterized in that The first indication information is carried in dedicated signaling of the terminal device.

17. The method according to any one of claims 1 to 16, characterized in that The first terminal device is a zero-power consumption terminal.

18. A method for wireless communication, characterized in that: include: The network device sends first information, where the first information is used by the first terminal device to determine the first channel from multiple channels supported by the current cell, and the first information includes one or more of the following: weight parameters of the plurality of channels; a first channel group to which the first terminal device belongs, wherein the plurality of channels belong to a plurality of channel groups, and the first channel group is one of the plurality of channel groups; as well as The first indication information is used to indicate the first channel to the first terminal device.

19. The method according to claim 18, characterized in that The first channel is determined based on the weight parameter and second information, and the second information includes one or more of the following: A first identifier associated with the first terminal device; and The number of the plurality of channels.

20. The method according to claim 19, characterized in that The first identifier includes one or more of the following identifiers: The label identification of the first terminal device; The service identifier of the first terminal device; and The group identifier of the terminal device group to which the first terminal device belongs.

21. The method according to claim 20, characterized in that The type of the first identifier is determined based on the type of a trigger signal, and the trigger signal is used to trigger the first terminal device to perform backscatter communication.

22. The method according to claim 21, characterized in that: If the trigger signal is a trigger signal for a single terminal device, the first identifier is a tag identifier of the first terminal device; or, If the trigger signal is a trigger signal for a service, the first identifier is a service identifier of the first terminal device; or, If the trigger signal is a trigger signal for a terminal device group, the first identifier is a group identifier of the terminal device group to which the first terminal device belongs.

23. The method according to any one of claims 19 to 22, characterized in that The first channel is determined based on the weight parameter, the second information and a first rule; the first rule is associated with a multiple access mode supported by the current cell.

24. The method according to claim 23, characterized in that: If the current cell only supports frequency division multiple access, the first rule is: selecting a channel based on the frequency division multiple access; or, If the current cell supports frequency division multiple access and other multiple access modes, and the frequency division multiple access mode is prioritized, the first rule is: first select a channel based on the frequency division multiple access mode, and then select a channel based on the other multiple access modes; or, If the current cell supports frequency division multiple access and other multiple access modes, and the other multiple access modes are prioritized, the first rule is: first select a channel based on the other multiple access modes, and then select a channel based on the frequency division multiple access mode.

25. The method according to claim 18, characterized in that The first channel is determined based on the first channel group and third information, and the third information includes one or more of the following information: A first identifier associated with the first terminal device; and The number of channels included in the first channel group.

26. The method according to claim 25, characterized in that The first channel is determined based on the first channel group, the third information and a second rule; the second rule is associated with the multiple access mode supported by the current cell.

27. The method according to claim 26, characterized in that: If the current cell only supports frequency division multiple access, the second rule is: selecting a channel based on the frequency division multiple access; or, If the current cell supports frequency division multiple access and other multiple access modes, and the frequency division multiple access mode is prioritized, the second rule is: first select a channel based on the frequency division multiple access mode, and then select a channel based on the other multiple access modes; or, If the current cell supports frequency division multiple access and other multiple access modes, and the other multiple access modes are prioritized, the second rule is: first select a channel based on the other multiple access modes, and then select a channel based on the frequency division multiple access mode.

28. The method according to any one of claims 18 to 27, characterized in that The first channel group is determined based on fourth information, and the fourth information includes one or more of the following information: A first identifier associated with the first terminal device; and The number of channel groups included in the current cell.

29. The method according to claim 28, characterized in that The first channel group is determined based on the fourth information and a third rule; the third rule is associated with the multiple access mode supported by the current cell.

30. The method according to claim 29, characterized in that: If the current cell only supports frequency division multiple access, the third rule is: selecting a channel group based on the frequency division multiple access; or, If the current cell supports frequency division multiple access mode and other multiple access modes, and the frequency division multiple access mode is prioritized, the third rule is: first select a channel group based on the frequency division multiple access mode, and then select a channel group based on the other multiple access modes; or, If the current cell supports frequency division multiple access and other multiple access modes, and the other multiple access modes are prioritized, the third rule is: first select a channel group based on the other multiple access modes, and then select a channel group based on the frequency division multiple access mode.

31. The method according to any one of claims 18 to 27, characterized in that The first channel group is determined based on mapping relationship information sent by the network device, and the mapping relationship information is used to indicate a mapping relationship between the first identifier and the first channel group.

32. The method according to any one of claims 25 to 31, characterized in that The first identifier includes one or more of the following: The label identification of the first terminal device; and The service identifier of the first terminal device.

33. The method according to claim 18, characterized in that The first indication information is carried in dedicated signaling of the terminal device.

34. The method according to any one of claims 18 to 33, characterized in that The first terminal device is a zero-power consumption terminal.

35. A terminal device, characterized in that: The terminal device is a first terminal device, and the first terminal device includes: A determination module, configured to determine a first channel from a plurality of channels supported by a current cell according to the first information; The first information includes one or more of the following: weight parameters of the plurality of channels; A first identifier associated with the first terminal device; a first channel group to which the first terminal device belongs, wherein the plurality of channels belong to a plurality of channel groups, and the first channel group is one of the plurality of channel groups; and The first indication information sent by the network device is used to indicate the first channel to the first terminal device.

36. The terminal device according to claim 35, characterized in that: The first channel is determined based on the weight parameter and second information, and the second information includes one or more of the following: the first identifier; and The number of the plurality of channels.

37. The terminal device according to claim 36, characterized in that: The first identifier includes one or more of the following identifiers: The label identification of the first terminal device; The service identifier of the first terminal device; and The group identifier of the terminal device group to which the first terminal device belongs.

38. The terminal device according to claim 37, characterized in that: The type of the first identifier is determined based on the type of a trigger signal, and the trigger signal is used to trigger the first terminal device to perform backscatter communication.

39. The terminal device according to claim 38, characterized in that: If the trigger signal is a trigger signal for a single terminal device, the first identifier is a tag identifier of the first terminal device; or, If the trigger signal is a trigger signal for a service, the first identifier is a service identifier of the first terminal device; or, If the trigger signal is a trigger signal for a terminal device group, the first identifier is a group identifier of the terminal device group to which the first terminal device belongs.

40. The terminal device according to any one of claims 36 to 39, characterized in that: The first channel is determined based on the weight parameter, the second information and a first rule; the first rule is associated with a multiple access mode supported by the current cell.

41. The terminal device according to claim 40, characterized in that: If the current cell only supports frequency division multiple access, the first rule is: selecting a channel based on the frequency division multiple access; or, If the current cell supports frequency division multiple access and other multiple access modes, and the frequency division multiple access mode is prioritized, the first rule is: first select a channel based on the frequency division multiple access mode, and then select a channel based on the other multiple access modes; or, If the current cell supports frequency division multiple access and other multiple access modes, and the other multiple access modes are prioritized, the first rule is: first select a channel based on the other multiple access modes, and then select a channel based on the frequency division multiple access mode.

42. The terminal device according to claim 35, characterized in that: The first channel is determined based on the first channel group and third information, and the third information includes one or more of the following information: the first identifier; and The number of channels included in the first channel group.

43. The terminal device according to claim 42, characterized in that: The first channel is determined based on the first channel group, the third information and a second rule; the second rule is associated with the multiple access mode supported by the current cell.

44. The terminal device according to claim 43, characterized in that: If the current cell only supports frequency division multiple access, the second rule is: selecting a channel based on the frequency division multiple access; or, If the current cell supports frequency division multiple access and other multiple access modes, and the frequency division multiple access mode is prioritized, the second rule is: first select a channel based on the frequency division multiple access mode, and then select a channel based on the other multiple access modes; or, If the current cell supports frequency division multiple access and other multiple access modes, and the other multiple access modes are prioritized, the second rule is: first select a channel based on the other multiple access modes, and then select a channel based on the frequency division multiple access mode.

45. The terminal device according to any one of claims 35 to 44, characterized in that: The first channel group is determined based on fourth information, and the fourth information includes one or more of the following information: the first identifier; and The number of channel groups included in the current cell.

46. ​​The terminal device according to claim 45, characterized in that: The first channel group is determined based on the fourth information and a third rule; the third rule is associated with the multiple access mode supported by the current cell.

47. The terminal device according to claim 46, characterized in that: If the current cell only supports frequency division multiple access, the third rule is: selecting a channel group based on the frequency division multiple access; or, If the current cell supports frequency division multiple access mode and other multiple access modes, and the frequency division multiple access mode is prioritized, the third rule is: first select a channel group based on the frequency division multiple access mode, and then select a channel group based on the other multiple access modes; or, If the current cell supports frequency division multiple access and other multiple access modes, and the other multiple access modes are prioritized, the third rule is: first select a channel group based on the other multiple access modes, and then select a channel group based on the frequency division multiple access mode.

48. The terminal device according to any one of claims 35 to 44, characterized in that: The first channel group is determined based on mapping relationship information sent by a network device, and the mapping relationship information is used to indicate a mapping relationship between the first identifier and the first channel group.

49. The terminal device according to any one of claims 42 to 48, characterized in that: The first identifier includes one or more of the following: The label identification of the first terminal device; and The service identifier of the first terminal device.

50. The terminal device according to claim 35, characterized in that: The first indication information is carried in dedicated signaling of the terminal device.

51. The terminal device according to any one of claims 35 to 50, characterized in that: The first terminal device is a zero-power consumption terminal.

52. A network device, characterized in that: include: A communication module, configured to send first information, where the first information is used by a first terminal device to determine a first channel from a plurality of channels supported by a current cell, and the first information includes one or more of the following: weight parameters of the plurality of channels; The first channel group to which the first terminal device belongs, wherein the multiple channels belong to multiple channel groups, the first channel group is one of the plurality of channel groups; and The first indication information is used to indicate the first channel to the first terminal device.

53. The network device according to claim 52, characterized in that: The first channel is determined based on the weight parameter and second information, and the second information includes one or more of the following: A first identifier associated with the first terminal device; and The number of the plurality of channels.

54. The network device according to claim 53, characterized in that: The first identifier includes one or more of the following identifiers: The label identification of the first terminal device; The service identifier of the first terminal device; and The group identifier of the terminal device group to which the first terminal device belongs.

55. The network device according to claim 54, characterized in that The type of the first identifier is determined based on the type of a trigger signal, and the trigger signal is used to trigger the first terminal device to perform backscatter communication.

56. The network device according to claim 55, characterized in that: If the trigger signal is a trigger signal for a single terminal device, the first identifier is a tag identifier of the first terminal device; or, If the trigger signal is a trigger signal for a service, the first identifier is a service identifier of the first terminal device; or, If the trigger signal is a trigger signal for a terminal device group, the first identifier is a group identifier of the terminal device group to which the first terminal device belongs.

57. The network device according to any one of claims 53 to 56, characterized in that: The first channel is determined based on the weight parameter, the second information and a first rule; the first rule is associated with a multiple access mode supported by the current cell.

58. The network device according to claim 57, characterized in that: If the current cell only supports frequency division multiple access, the first rule is: selecting a channel based on the frequency division multiple access; or, If the current cell supports frequency division multiple access and other multiple access modes, and the frequency division multiple access mode is prioritized, the first rule is: first select a channel based on the frequency division multiple access mode, and then select a channel based on the other multiple access modes; or, If the current cell supports frequency division multiple access and other multiple access modes, and the other multiple access modes are prioritized, the first rule is: first select a channel based on the other multiple access modes, and then select a channel based on the frequency division multiple access mode.

59. The network device according to claim 52, characterized in that The first channel is determined based on the first channel group and third information, and the third information includes one or more of the following information: A first identifier associated with the first terminal device; and The number of channels included in the first channel group.

60. The network device according to claim 59, characterized in that The first channel is determined based on the first channel group, the third information and a second rule; the second rule is associated with the multiple access mode supported by the current cell.

61. The network device according to claim 60, characterized in that: If the current cell only supports frequency division multiple access, the second rule is: selecting a channel based on the frequency division multiple access; or, If the current cell supports frequency division multiple access and other multiple access modes, and the frequency division multiple access mode is prioritized, the second rule is: first select a channel based on the frequency division multiple access mode, and then select a channel based on the other multiple access modes; or, If the current cell supports frequency division multiple access and other multiple access modes, and the other multiple access modes are prioritized, the second rule is: first select a channel based on the other multiple access modes, and then select a channel based on the frequency division multiple access mode.

62. The network device according to any one of claims 52 to 61, characterized in that: The first channel group is determined based on fourth information, and the fourth information includes one or more of the following information: A first identifier associated with the first terminal device; and The number of channel groups included in the current cell.

63. The network device according to claim 62, characterized in that The first channel group is determined based on the fourth information and a third rule; the third rule is associated with the multiple access mode supported by the current cell.

64. The network device according to claim 63, characterized in that: If the current cell only supports frequency division multiple access, the third rule is: selecting a channel group based on the frequency division multiple access; or, If the current cell supports frequency division multiple access mode and other multiple access modes, and the frequency division multiple access mode is prioritized, the third rule is: first select a channel group based on the frequency division multiple access mode, and then select a channel group based on the other multiple access modes; or, If the current cell supports frequency division multiple access and other multiple access modes, and the other multiple access modes are prioritized, then the third rule The method is as follows: firstly selecting a channel group based on the other multiple access modes, and then selecting a channel group based on the frequency division multiple access mode.

65. The network device according to any one of claims 52 to 61, characterized in that: The first channel group is determined based on mapping relationship information sent by the network device, and the mapping relationship information is used to indicate a mapping relationship between the first identifier and the first channel group.

66. The network device according to any one of claims 59 to 65, characterized in that: The first identifier includes one or more of the following: The label identification of the first terminal device; and The service identifier of the first terminal device.

67. The network device according to claim 52, characterized in that The first indication information is carried in dedicated signaling of the terminal device.

68. The network device according to any one of claims 52 to 67, characterized in that: The first terminal device is a zero-power consumption terminal.

69. A terminal device, characterized in that: It comprises a transceiver, a memory and a processor, wherein the memory is used to store programs, and the processor is used to call the programs in the memory and control the transceiver to receive or send signals so that the terminal device executes the method as described in any one of claims 1 to 17.

70. A network device, characterized in that: It comprises a transceiver, a memory and a processor, wherein the memory is used to store programs, and the processor is used to call the programs in the memory and control the transceiver to receive or send signals so that the network device executes the method as described in any one of claims 18-34.

71. A device, characterized in that It comprises a processor, which is used to call a program from a memory so that the device executes the method as described in any one of claims 1-17 or 18-34.

72. A chip, characterized in that: It comprises a processor, which is used to call a program from a memory, so that a device equipped with the chip executes the method as described in any one of claims 1-17 or 18-34.

73. A computer-readable storage medium, characterized in that A program is stored thereon, the program causing a computer to execute the method as claimed in any one of claims 1-17 or 18-34.

74. A computer program product, characterized in that It comprises a program which causes a computer to execute the method as claimed in any one of claims 1 to 17 or 18 to 34.

75. A computer program, characterized in that The computer program causes a computer to execute the method according to any one of claims 1-17 or 18-34.

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