Wireless charging method and communication device

Abstract

The invention discloses a wireless energy charging method and a communication device, and the wireless energy charging method comprises the steps that a terminal device sends a first signal to a network device, the network device obtains the first signal, and sends at least one energy charging signal, so that the terminal device obtains energy from the at least one energy charging signal. Wherein the first signal comprises a first modulation symbol sequence, the charging signal comprises a second modulation symbol sequence, and the second modulation symbol sequence is obtained by performing conjugate processing on at least one modulation symbol in the first modulation symbol sequence. In the application, the network device takes the second modulation symbol sequence obtained by performing conjugate processing on the at least one modulation symbol from the terminal device as the modulation symbol of the charging signal, wireless charging can be realized without performing precoding processing, and the processing complexity is relatively low.

Description

Technical Field

[0001] The present application relates to the field of energy charging technology, and in particular to a wireless energy charging method and a communication device. Background Art

[0002] Wireless energy transfer (WPT) is one of the important ways to solve the problem of insufficient power in terminal devices. The base station can be used as a device to provide energy. For example, the base station sends a charging signal, and the terminal devices around the base station can obtain energy from the charging signal. At present, most of the charging signals sent by the base station to the terminal devices need to be pre-coded, which has a high processing complexity. Summary of the invention

[0003] The present application provides a wireless charging method and a communication device for reducing the signal processing complexity in wireless energy transmission.

[0004] In order to achieve the above purpose, the embodiment of the present application adopts the following technical solution:

[0005] In the first aspect, an embodiment of the present application provides a wireless charging method that can be performed by a first communication device. The first communication device may be a network device, or the first communication device may be a component for implementing the functions of a network device. For example, the first communication device is a unit / module, a circuit or a chip inside the network device. The method provided in the first aspect is described below using the first communication device as the network device itself as an example. Those skilled in the art may understand that the method provided in the first aspect may also be implemented by a unit / module, a circuit or a chip inside the network device.

[0006] The charging method includes: a network device acquires a first signal and sends at least one charging signal. The first signal includes a first modulation symbol sequence. The charging signal includes a second modulation symbol sequence, and the second modulation symbol sequence is obtained according to a result of conjugating at least one modulation symbol in the first modulation symbol sequence.

[0007] In this solution, the first signal comes from the device to be charged, such as a terminal device. The network device can conjugate at least one modulation symbol from the terminal device, and use the second modulation symbol sequence obtained after the conjugate processing as the modulation symbol of the charging signal, so that wireless charging can be achieved even without precoding processing. The processing complexity of wireless charging achieved through this solution is relatively low.

[0008] In one implementation, the second modulation symbol sequence is obtained based on the result of conjugating at least one modulation symbol in the first modulation symbol sequence, including but not limited to the following implementation forms. The specific implementation form used is not limited in the embodiment of the present application.

[0009] In implementation form 1, the first modulation symbol in the second modulation symbol sequence is the conjugate of the second modulation symbol in the first modulation symbol sequence, which is relatively simple.

[0010] In implementation form 2, the first modulation symbol in the second modulation symbol sequence is obtained by conjugating and amplitude scaling the second modulation symbol in the first modulation symbol sequence. Implementation form 2 can flexibly adjust the transmission power of the second modulation symbol sequence through amplitude scaling, so that the power of the charging signal is greater, so that the terminal device can collect more power and the charging effect is better.

[0011] In implementation form three, the second modulation symbol sequence is obtained by conjugating and weighted averaging at least two modulation symbols in the first modulation symbol sequence. Implementation form three can reduce noise, so that the signal-to-noise ratio of the second modulation symbol sequence is higher, so that the power of the charging signal generated by the second modulation symbol sequence is greater and the charging effect is better.

[0012] In one implementation, the second modulation symbol sequence is obtained based on the result of conjugating at least one modulation symbol in the first modulation symbol sequence, and also includes: the second modulation symbol sequence is obtained based on conjugating at least two modulation symbols in the first modulation symbol sequence and then reversing them.

[0013] In this implementation, the conjugation process includes inversion processing. By conjugating at least two modulation symbols in the first modulation symbol sequence and then inverting them to obtain the second modulation symbol sequence, the second modulation symbol sequence can achieve energy focusing in the time dimension, thereby improving the charging effect.

[0014] In one implementation, the first modulation symbol sequence is a modulation symbol sequence obtained by performing channel estimation on the first signal. For example, each modulation symbol in the first modulation symbol sequence is a channel fading value obtained through channel estimation. Before obtaining the first modulation symbol sequence, the influence of interference and noise can be reduced by performing channel estimation on the first signal, so that the noise of the obtained first modulation symbol sequence is lower. Through this scheme, the noise of the second modulation symbol sequence obtained according to the first modulation symbol sequence is also lower, so that the power of the charging signal generated based on the second modulation symbol sequence is larger and the charging effect is better.

[0015] In one implementation, the method further includes: the network device receives first indication information, where the first indication information is used to indicate that the first signal is used to request charging.

[0016] The first indication information can enable the network device to clearly understand that the first signal is used to request charging, thereby preventing the network device from misunderstanding the first signal and causing failure to charge the terminal device.

[0017] In one implementation, the first signal is carried on a first time-frequency resource, and the first time-frequency resource is used to transmit a charging request signal.

[0018] In this solution, the resource carrying the first signal indicates that the first signal is used to request charging, and no additional signaling indication is required, thereby saving signaling overhead.

[0019] In one implementation, the method further includes: the network device sends configuration information, where the configuration information is used to indicate a second time-frequency resource, and the second time-frequency resource is used to transmit a charging request signal.

[0020] In this solution, the network device configures resources for the terminal device to transmit the charging request signal, which can prevent some resources from being occupied by one or some terminal devices, causing other terminal devices to be unable to request charging due to being unable to use certain resources.

[0021] In one implementation, each modulation symbol in the first modulation symbol sequence is a superposition of modulation symbols of multiple terminal devices.

[0022] When multiple terminal devices need to be charged, the network device can superimpose these multiple modulation symbols and perform conjugation processing, and use the final modulation symbol as the modulation symbol of the charging signal. This solution does not need to send charging signals to each terminal device separately, and can charge multiple terminal devices at the same time, saving more resource overhead.

[0023] In one implementation, the method further includes: the network device sending a second signal, and the first signal is a reflected signal of the second signal.

[0024] In this solution, when the terminal device needs to be charged, it can reflect the second signal sent by the network device. The network device identifies the first signal. If the first signal is a reflection signal of the second signal, it is considered that the terminal device needs to be charged. There is no need for the terminal device to actively send a signal for requesting charging. This solution is applicable to terminal devices that do not have enough power to send a signal for requesting charging (such as passive terminal devices), and has a wider range of applications.

[0025] In one implementation, the subcarrier occupied by the first signal is spaced apart from the subcarrier occupied by the second signal by k subcarriers, where k is an integer. The terminal device can determine the frequency domain position of the first signal mapping according to the subcarrier occupied by the second signal to avoid resource conflicts and reduce interference.

[0026] In one implementation, the method further includes: the network device sends second indication information, where the second indication information is used to indicate k.

[0027] In this solution, k is configured by the network device to reduce resource conflicts and interference. For multiple different terminal devices, the network device can be configured with the same k, or a group of terminal devices corresponds to the same k, so that the wireless charging signal can be directed to a group of terminal devices, reducing or even avoiding energy dispersion to improve charging efficiency.

[0028] In one implementation, the first signal comes from multiple terminal devices, which include a first terminal device and a second terminal device. The first signal includes a first component and a second component, the first component corresponds to the first terminal device, and the second component corresponds to the second terminal device; wherein, the subcarrier occupied by the first component is spaced apart from the subcarrier occupied by the second signal by k1 subcarriers, and the subcarrier occupied by the second component is spaced apart from the subcarrier occupied by the second signal by k2 subcarriers, k1 and k2 are different, and both k1 and k2 are integers.

[0029] In this solution, different terminal devices reflect the second signal at different locations of frequency domain resources, so as to avoid resource conflicts and reduce interference.

[0030] In an implementation manner, the method further includes: the network device sends third indication information, where the third indication information is used to indicate k1; and the network device sends fourth indication information, where the fourth indication information is used to indicate k2.

[0031] In this solution, k1 and / or k2 are configured by the network device, and the positions of the frequency domain resources for reflecting the second signal by terminal devices of different groups can be the same, so that the wireless charging signal is directed to a group of terminal devices, reducing or even avoiding energy dispersion to improve charging efficiency.

[0032] In one implementation, the time domain start position of the second modulation symbol sequence is separated from the time domain end position in the first modulation symbol sequence by n symbols, where n is an integer greater than or equal to 0.

[0033] In this scheme, there is no restriction on the time domain starting position of the charging signal. For example, the starting position of the charging signal can be the time domain ending position of the first signal, so that the second modulation symbol sequence is closer to the last modulation in the first modulation symbol sequence, thereby improving the charging effect and the charging efficiency.

[0034] In one implementation, the method further includes: the network device sends fifth indication information, where the fifth indication information is used to indicate n.

[0035] In this solution, the network device configures n, and the time domain starting position of the charging signal can be flexibly configured. For example, the time domain starting position of the charging signal is close to the time domain ending position of the first signal to improve the charging effect and efficiency. For another example, the time domain starting position of the charging signal is far from the time domain ending position of the first signal, so that resources are reserved for business data first, reducing the transmission delay of business data.

[0036] In one implementation, the second modulation symbol sequence is continuous in the time domain, which can improve the charging efficiency. Alternatively, the second modulation symbol sequence is discrete in the time domain, which can reserve earlier resources for service data as much as possible and reduce the transmission delay of service data.

[0037] In one implementation, the subcarriers occupied by the second modulation symbol sequence are spaced apart from the subcarriers occupied by the first modulation symbol sequence by m subcarriers, where m is an integer.

[0038] In this solution, the network device can determine the frequency domain position of the second modulation symbol sequence mapping according to the subcarrier occupied by the first modulation symbol sequence. For example, m = 0, the transmission channel of the second modulation symbol sequence is similar to the transmission channel of the first modulation symbol sequence, and the two are highly correlated, which can make the power of the charging signal generated by the second modulation symbol sequence larger, thereby achieving a better charging effect.

[0039] In one implementation, the method further includes: the network device sends sixth indication information, where the sixth indication information is used to indicate m.

[0040] In this solution, m is configured by the network device, which is more flexible and can reduce resource conflicts.

[0041] In one implementation, the first modulation symbol sequence occupies multiple subcarriers, and the second modulation symbol sequence occupies at least one subcarrier among the multiple subcarriers. In this solution, subcarriers other than at least one subcarrier among the multiple subcarriers can be used to transmit service data. By flexibly scheduling at least one subcarrier, the conflict between the subcarrier occupied by the charging signal and the subcarrier used to transmit service data can be reduced.

[0042] In one implementation, a first modulation symbol in a first modulation symbol sequence is received from a p-th antenna, and a second modulation symbol in a second modulation symbol sequence is sent from a p-th antenna.

[0043] In this scheme, the antenna that sends the first modulation symbol sequence is selected to send the second modulation symbol sequence, so that the correlation between the transmission channel of the second modulation symbol sequence and the transmission channel of the first modulation symbol sequence is strong, thereby making the power of the charging signal as large as possible to achieve a better charging effect.

[0044] In the second aspect, an embodiment of the present application provides a wireless charging method, which can be performed by a second communication device. The second communication device may be a terminal device, or the second communication device may be a component for implementing the functions of the terminal device. For example, the second communication device is a unit / module, a circuit or a chip inside the terminal device. The method provided in the second aspect is described below by taking the second communication device as the terminal device itself as an example. Those skilled in the art may understand that the method provided in the first aspect may also be implemented by a unit / module, a circuit or a chip inside the terminal device.

[0045] The charging method includes: a terminal device sends a first signal and receives at least one charging signal. The first signal includes a first modulation symbol sequence. The charging signal includes a second modulation symbol sequence, and the second modulation symbol sequence is obtained according to the result of conjugating at least one modulation symbol in the first modulation symbol sequence.

[0046] In one implementation, the second modulation symbol sequence is obtained based on the result of conjugating at least one modulation symbol in the first modulation symbol sequence, including: the first modulation symbol in the second modulation symbol sequence is the conjugate of the second modulation symbol in the first modulation symbol sequence; or, the first modulation symbol in the second modulation symbol sequence is obtained by conjugating and amplitude scaling the second modulation symbol in the first modulation symbol sequence; or, the second modulation symbol sequence is obtained by conjugating and weighted averaging at least two modulation symbols in the first modulation symbol sequence.

[0047] In one implementation, the second modulation symbol sequence is obtained based on the result of conjugating at least one modulation symbol in the first modulation symbol sequence, and also includes: the second modulation symbol sequence is obtained based on conjugating at least two modulation symbols in the first modulation symbol sequence and then reversing them.

[0048] In one implementation, the first modulation symbol sequence is a modulation symbol sequence obtained by performing channel estimation on the first signal.

[0049] In one implementation, the method further includes: the terminal device sends first indication information, where the first indication information is used to indicate that the first signal is used to request charging.

[0050] In one implementation, the first signal is carried on a first time-frequency resource, and the first time-frequency resource is used to transmit a charging request signal.

[0051] In one implementation, the method further includes: the terminal device receives configuration information, where the configuration information is used to indicate a second time-frequency resource, and the second time-frequency resource is used to transmit a charging request signal.

[0052] In one implementation, each modulation symbol in the first modulation symbol sequence is a superposition of modulation symbols of multiple terminal devices.

[0053] In one implementation, the first signal is a reflected signal of a second signal, and the second signal comes from a network device.

[0054] In one implementation, a subcarrier occupied by the first signal and a subcarrier occupied by the second signal are spaced apart by k subcarriers, where k is an integer.

[0055] In one implementation, the method further includes: the terminal device receives second indication information, where the second indication information is used to indicate k.

[0056] In one implementation, the first signal comes from multiple terminal devices, which include a first terminal device and a second terminal device. The first signal includes a first component and a second component, the first component corresponds to the first terminal device, and the second component corresponds to the second terminal device; wherein, the subcarrier occupied by the first component is spaced apart from the subcarrier occupied by the second signal by k1 subcarriers, and the subcarrier occupied by the second component is spaced apart from the subcarrier occupied by the second signal by k2 subcarriers, k1 and k2 are different, and both k1 and k2 are integers.

[0057] In one implementation, the method further includes: the terminal device receives third indication information, where the third indication information is used to indicate k1; and the terminal device receives fourth indication information, where the fourth indication information is used to indicate k2.

[0058] In one implementation, the time domain start position of the second modulation symbol sequence is separated from the time domain end position in the first modulation symbol sequence by n symbols, where n is an integer greater than or equal to 0.

[0059] In one implementation, the method further includes: the terminal device receives fifth indication information, where the fifth indication information is used to indicate n.

[0060] In one implementation, the second modulation symbol sequence is continuous in the time domain; or, the second modulation symbol sequence is discrete in the time domain.

[0061] In one implementation, the subcarriers occupied by the second modulation symbol sequence are spaced apart from the subcarriers occupied by the first modulation symbol sequence by m subcarriers, where m is an integer.

[0062] In one implementation, the method further includes: the terminal device receives sixth indication information, where the sixth indication information is used to indicate m.

[0063] In one implementation, the first modulation symbol sequence occupies a plurality of subcarriers, and the second modulation symbol sequence occupies at least one subcarrier among the plurality of subcarriers.

[0064] In one implementation, a first modulation symbol in a first modulation symbol sequence is received from a p-th antenna, and a second modulation symbol in a second modulation symbol sequence is sent from a p-th antenna.

[0065] Regarding the beneficial effects of the second aspect and each implementation method, reference may be made to the beneficial effects of the aforementioned first aspect and each implementation method, which will not be repeated here.

[0066] In a third aspect, an embodiment of the present application provides a wireless charging method that can be performed by a first communication device. The first communication device may be a network device, or the first communication device may be a component for implementing the functions of a network device. For example, the first communication device is a unit / module, a circuit or a chip inside the network device. The method provided in the third aspect is described below using the first communication device as the network device itself as an example. Those skilled in the art may understand that the method provided in the first aspect may also be implemented by a unit / module, a circuit or a chip inside the network device.

[0067] The charging method includes: a network device receives a first signal and sends at least one charging signal. The first signal is a reflection signal of a second signal sent by the network device. The first signal includes a first modulation symbol sequence. The charging signal includes a second modulation symbol sequence, and the second modulation symbol sequence is obtained according to a result of conjugating at least one modulation symbol in the first modulation symbol sequence.

[0068] In one implementation, the second modulation symbol sequence is obtained based on the result of conjugating at least one modulation symbol in the first modulation symbol sequence, including: the first modulation symbol in the second modulation symbol sequence is the conjugate of the second modulation symbol in the first modulation symbol sequence; or, the first modulation symbol in the second modulation symbol sequence is obtained by conjugating and amplitude scaling the second modulation symbol in the first modulation symbol sequence; or, the second modulation symbol sequence is obtained by conjugating and weighted averaging at least two modulation symbols in the first modulation symbol sequence.

[0069] In one implementation, the second modulation symbol sequence is obtained based on the result of conjugating at least one modulation symbol in the first modulation symbol sequence, and also includes: the second modulation symbol sequence is obtained by conjugating at least two modulation symbols in the first modulation symbol sequence and then reversing them.

[0070] In one implementation, the first modulation symbol sequence is a modulation symbol sequence obtained by performing channel estimation on the first signal.

[0071] In one implementation, the method further includes: the network device receives first indication information, where the first indication information is used to indicate that the first signal is used to request charging.

[0072] In one implementation, the first signal is carried on a first time-frequency resource, and the first time-frequency resource is used to transmit a charging request signal.

[0073] In one implementation, the method further includes: network device mode configuration information, the configuration information is used to indicate a second time-frequency resource, and the second time-frequency resource is used to transmit a charging request signal.

[0074] In one implementation, each modulation symbol in the first modulation symbol sequence is a superposition of modulation symbols of multiple terminal devices.

[0075] In one implementation, a subcarrier occupied by the first signal and a subcarrier occupied by the second signal are spaced apart by k subcarriers, where k is an integer.

[0076] In one implementation, the method further includes: the network device sends second indication information, where the second indication information is used to indicate k.

[0077] In one implementation, the first signal comes from multiple terminal devices, which include a first terminal device and a second terminal device. The first signal includes a first component and a second component, the first component corresponds to the first terminal device, and the second component corresponds to the second terminal device; wherein, the subcarrier occupied by the first component is spaced apart from the subcarrier occupied by the second signal by k1 subcarriers, and the subcarrier occupied by the second component is spaced apart from the subcarrier occupied by the second signal by k2 subcarriers, k1 and k2 are different, and both k1 and k2 are integers.

[0078] In an implementation manner, the method further includes: the network device sends third indication information, where the third indication information is used to indicate k1; and the network device sends fourth indication information, where the fourth indication information is used to indicate k2.

[0079] In one implementation, the time domain start position of the second modulation symbol sequence is separated from the time domain end position in the first modulation symbol sequence by n symbols, where n is an integer greater than or equal to 0.

[0080] In one implementation, the method further includes: the network device sends fifth indication information, where the fifth indication information is used to indicate n.

[0081] In one implementation, the second modulation symbol sequence is continuous in the time domain; or, the second modulation symbol sequence is discrete in the time domain.

[0082] In one implementation, the subcarriers occupied by the second modulation symbol sequence are spaced apart from the subcarriers occupied by the first modulation symbol sequence by m subcarriers, where m is an integer.

[0083] In one implementation, the method further includes: the network device sends sixth indication information, where the sixth indication information is used to indicate m.

[0084] In one implementation, the first modulation symbol sequence occupies a plurality of subcarriers, and the second modulation symbol sequence occupies at least one subcarrier among the plurality of subcarriers.

[0085] In one implementation, a first modulation symbol in a first modulation symbol sequence is received from a p-th antenna, and a second modulation symbol in a second modulation symbol sequence is sent from a p-th antenna.

[0086] Regarding the beneficial effects of the third aspect and each implementation method, reference may be made to the beneficial effects of the aforementioned first aspect and each implementation method, which will not be repeated here.

[0087] In a fourth aspect, an embodiment of the present application provides a wireless charging method that can be performed by a second communication device. The second communication device may be a terminal device, or the second communication device may be a component for implementing the functions of the terminal device. For example, the second communication device is a unit / module, a circuit or a chip inside the terminal device. The method provided in the fourth aspect is described below by taking the second communication device as the terminal device itself as an example. Those skilled in the art may understand that the method provided in the first aspect may also be implemented by a unit / module, a circuit or a chip inside the terminal device.

[0088] The charging method includes: a terminal device receives a second signal, reflects the second signal, and receives at least one charging signal. The charging signal includes a second modulation symbol sequence, and the second modulation symbol sequence is obtained according to the result of conjugating at least one modulation symbol in the first modulation symbol sequence. The first modulation symbol sequence is included in the first signal. The first signal is a reflection signal of the second signal.

[0089] In one implementation, the second modulation symbol sequence is obtained based on the result of conjugating at least one modulation symbol in the first modulation symbol sequence, including: the first modulation symbol in the second modulation symbol sequence is the conjugate of the second modulation symbol in the first modulation symbol sequence; or, the first modulation symbol in the second modulation symbol sequence is obtained by conjugating and amplitude scaling the second modulation symbol in the first modulation symbol sequence; or, the second modulation symbol sequence is obtained by conjugating and weighted averaging at least two modulation symbols in the first modulation symbol sequence.

[0090] In one implementation, the second modulation symbol sequence is obtained based on the result of conjugating at least one modulation symbol in the first modulation symbol sequence, and also includes: the second modulation symbol sequence is obtained based on conjugating at least two modulation symbols in the first modulation symbol sequence and then reversing them.

[0091] In one implementation, the first modulation symbol sequence is a modulation symbol sequence obtained by performing channel estimation on the first signal.

[0092] In one implementation, the method further includes: the terminal device sends first indication information, where the first indication information is used to indicate that the first signal is used to request charging.

[0093] In one implementation, the first signal is carried on a first time-frequency resource, and the first time-frequency resource is used to transmit a charging request signal.

[0094] In one implementation, the method further includes: the terminal device receives configuration information, where the configuration information is used to indicate a second time-frequency resource, and the second time-frequency resource is used to transmit a charging request signal.

[0095] In one implementation, each modulation symbol in the first modulation symbol sequence is a superposition of modulation symbols of multiple terminal devices.

[0096] In one implementation, the first signal is a reflected signal of a second signal, and the second signal comes from a network device.

[0097] In one implementation, a subcarrier occupied by the first signal and a subcarrier occupied by the second signal are spaced apart by k subcarriers, where k is an integer.

[0098] In one implementation, the method further includes: the terminal device receives second indication information, where the second indication information is used to indicate k.

[0099] In one implementation, the first signal comes from multiple terminal devices, which include a first terminal device and a second terminal device. The first signal includes a first component and a second component, the first component corresponds to the first terminal device, and the second component corresponds to the second terminal device; wherein, the subcarrier occupied by the first component is spaced apart from the subcarrier occupied by the second signal by k1 subcarriers, and the subcarrier occupied by the second component is spaced apart from the subcarrier occupied by the second signal by k2 subcarriers, k1 and k2 are different, and both k1 and k2 are integers.

[0100] In one implementation, the method further includes: the terminal device receives third indication information, where the third indication information is used to indicate k1; and the terminal device receives fourth indication information, where the fourth indication information is used to indicate k2.

[0101] In one implementation, the time domain start position of the second modulation symbol sequence is separated from the time domain end position in the first modulation symbol sequence by n symbols, where n is an integer greater than or equal to 0.

[0102] In one implementation, the method further includes: the terminal device receives fifth indication information, where the fifth indication information is used to indicate n.

[0103] In one implementation, the second modulation symbol sequence is continuous in the time domain; or, the second modulation symbol sequence is discrete in the time domain.

[0104] In one implementation, the subcarriers occupied by the second modulation symbol sequence are spaced apart from the subcarriers occupied by the first modulation symbol sequence by m subcarriers, where m is an integer.

[0105] In one implementation, the method further includes: the terminal device receives sixth indication information, where the sixth indication information is used to indicate m.

[0106] In one implementation, the first modulation symbol sequence occupies a plurality of subcarriers, and the second modulation symbol sequence occupies at least one subcarrier among the plurality of subcarriers.

[0107] In one implementation, a first modulation symbol in a first modulation symbol sequence is received from a p-th antenna, and a second modulation symbol in a second modulation symbol sequence is sent from a p-th antenna.

[0108] Regarding the beneficial effects of the fourth aspect and each implementation method, reference may be made to the beneficial effects of the aforementioned first aspect and each implementation method, which will not be repeated here.

[0109] In a fifth aspect, an embodiment of the present application provides a communication device, which has the function of implementing the behavior in the method example of any aspect of the first to fourth aspects above, and the beneficial effects can be found in the relevant descriptions of the first to fourth aspects, which will not be repeated here. For example, the communication device may be a network device or a terminal device in any aspect of the first to fourth aspects. For another example, the communication device may be a device that can support a network device or a terminal device to implement the functions required by the method provided in any aspect of the first to fourth aspects, for example, the communication device may be a chip or a chip system in a network device or a terminal device.

[0110] In one possible design, the communication device includes a baseband device and a radio frequency device.

[0111] In one possible design, the communication device includes corresponding means or modules for executing the methods of the first aspect to the fourth aspect. For example, the communication device includes a processing unit (sometimes also referred to as a processing module or processor) and / or a transceiver unit (sometimes also referred to as a transceiver module or transceiver). The transceiver unit can implement the sending function and the receiving function. When the transceiver unit implements the sending function, it can be called a sending unit (sometimes also referred to as a sending module). When the transceiver unit implements the receiving function, it can be called a receiving unit (sometimes also referred to as a receiving module). The sending unit and the receiving unit can be the same functional unit, which is called a transceiver unit, and the functional unit can implement the sending function and the receiving function; or, the sending unit and the receiving unit can be different functional units, and the transceiver unit is a general term for these functional units. These units (modules) can perform the corresponding functions in the method examples of any aspect of the first aspect to the fourth aspect above. Please refer to the detailed description in the method example for details, which will not be repeated here.

[0112] In a sixth aspect, an embodiment of the present application provides a communication device, which may be the communication device in the fifth aspect of the above embodiment, or a chip or chip system arranged in the communication device in the fifth aspect. The communication device includes a communication interface and a processor, and optionally, also includes a memory. The memory is used to store computer programs or instructions or data, and the processor is coupled to the memory and the communication interface. When the processor reads the computer program or instructions or data, the communication device executes the method performed by the network device or terminal device in the above method embodiment. For example, the communication device may be a network device or a terminal device, and the communication device may also be a functional module in the network device or the terminal device, such as a baseband chip and a radio frequency chip.

[0113] In the seventh aspect, an embodiment of the present application provides a chip system, which includes a processor and may also include a communication interface for implementing the method described in any of the first to fourth aspects. Optionally, the chip system also includes a memory. The memory is used to store computer programs (also referred to as codes, or instructions). The processor is used to call and run a computer program from the memory so that a device equipped with the chip system executes the method in the first aspect and any one of its implementations, or a device equipped with the chip system executes the method in the second aspect and any one of its implementations, or a device equipped with the chip system executes the method in the third aspect and any one of its implementations, or a device equipped with the chip system executes the method in the fourth aspect and any one of its implementations. The chip system may be composed of chips, or may include chips and other discrete devices.

[0114] In an eighth aspect, an embodiment of the present application provides a communication device, which includes an input / output interface and a logic circuit. The input / output interface is used to input and / or output information. The input / output interface can be an interface circuit, an output circuit, an input circuit, a pin or a related circuit, etc. The logic circuit is used to execute the method described in any aspect of the first aspect to the fourth aspect.

[0115] In the specific implementation process, the above-mentioned communication device can be a chip, the input circuit can be an input pin, the output circuit can be an output pin, and the logic circuit can be a transistor, a gate circuit, a trigger, and various logic circuits. The input signal received by the input circuit can be, for example, but not limited to, received and input by a receiver, and the signal output by the output circuit can be, for example, but not limited to, output to a transmitter and transmitted by the transmitter, and the input circuit and the output circuit can be the same circuit, which is used as an input circuit and an output circuit at different times. This application does not limit the specific implementation of the input and output interface and the logic circuit.

[0116] In one implementation, when the communication device is a wireless communication device, the wireless communication device may be a terminal device such as a mobile phone. The interface circuit may be a radio frequency processing chip in the wireless communication device, and the processing circuit may be a baseband processing chip in the wireless communication device. Alternatively, the wireless communication device may be a network device such as a base station. The interface circuit may be a radio frequency processing chip in the wireless communication device, and the processing circuit may be a baseband processing chip in the wireless communication device.

[0117] In the ninth aspect, an embodiment of the present application provides a communication system, which includes a network device and a terminal device, wherein the network device is used to implement the functions of the method described in the first aspect, and the terminal device is used to implement the functions of the method described in the second aspect; or, the network device is used to implement the functions of the method described in the third aspect, and the terminal device is used to implement the functions of the method described in the fourth aspect.

[0118] In the tenth aspect, an embodiment of the present application provides a computer-readable storage medium, which is used to store computer programs or instructions. When the computer-readable storage medium is executed, the method described in the first aspect and any one of its implementations is implemented, or the method described in the second aspect and any one of its implementations is implemented, or the method described in the third aspect and any one of its implementations is implemented, or the method described in the fourth aspect and any one of its implementations is implemented.

[0119] In the eleventh aspect, the embodiments of the present application also provide a computer program product comprising instructions, which, when executed on a computer, enables the method described in the first aspect and any one of its implementations to be implemented, or enables the method described in the second aspect and any one of its implementations to be implemented, or enables the method described in the third aspect and any one of its implementations to be implemented, or enables the method described in the fourth aspect and any one of its implementations to be implemented.

[0120] The beneficial effects of the fifth to eleventh aspects and their implementations can refer to the description of the beneficial effects of any aspect from the first to fourth aspects and any implementation of them. BRIEF DESCRIPTION OF THE DRAWINGS

[0121] Figure 1 This is an architecture diagram of a wireless charging system applicable to an embodiment of the present application;

[0122] Figure 2 A schematic diagram of a process for communication between a network device and a terminal device is provided for an embodiment of the present application;

[0123] Figure 3 A schematic diagram of a flow chart of a wireless charging method 300 provided in an embodiment of the present application;

[0124] Figure 4 A schematic diagram of a first modulation symbol sequence and a second modulation symbol sequence provided in an embodiment of the present application;

[0125] Figure 5 Another schematic diagram of a first modulation symbol sequence and a second modulation symbol sequence provided in an embodiment of the present application;

[0126] Figure 6 A first schematic diagram of time-frequency resources occupied by a first modulation symbol sequence and a second modulation symbol sequence in an embodiment of the present application;

[0127] Figure 7 A second schematic diagram of time-frequency resources occupied by the first modulation symbol sequence and the second modulation symbol sequence in an embodiment of the present application;

[0128] Figure 8 A third schematic diagram of time-frequency resources occupied by the first modulation symbol sequence and the second modulation symbol sequence in an embodiment of the present application;

[0129] Fig. 9 This is a fourth schematic diagram of time-frequency resources occupied by the first modulation symbol sequence and the second modulation symbol sequence in an embodiment of the present application;

[0130] Fig.10 A flowchart of a wireless charging method 1000 provided in an embodiment of the present application;

[0131] Fig.11 A schematic diagram of a flow chart of a wireless charging method 1100 provided in an embodiment of the present application;

[0132] Fig.12 A schematic diagram of the frequency domain positions of the first signal and the second signal provided in an embodiment of the present application;

[0133] Fig.13 Another schematic diagram of the frequency domain positions of the first signal and the second signal provided in an embodiment of the present application;

[0134] Fig.14 A schematic diagram of the structure of a communication device provided in an embodiment of the present application;

[0135] Fig.15 Another structural schematic diagram of a communication device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0136] The technical solution provided in the embodiments of the present application can be applied to a wireless charging system. The wireless charging system includes an energy-providing device and a device to be charged. The energy-providing device converts electrical energy into electromagnetic waves and transmits them in space. The device to be charged receives electromagnetic waves and converts electromagnetic wave energy into electrical energy, thereby finally realizing wireless charging. "Wireless charging" can also be referred to as "charging", "energy transmission", and "charging". The term "charging" can also be described as "wireless energy transmission", "wireless charging", "wireless energy transmission", "radio frequency energy transmission", "radio frequency energy transmission", "radio frequency charging", and "radio frequency charging".

[0137] As an example, the wireless charging system includes a communication system related to the 3rd generation partnership project (3GPP). For example, the wireless charging system can be a long term evolution (LTE) communication system, a 5th generation (5G) mobile communication system, or can also be applied to other next generation mobile communication systems, such as a 6th generation (6G) communication system, or other similar communication systems. Other similar communication systems may include wireless fidelity (WIFI), vehicle to everything (V2X), internet of things (IoT) system, narrow band internet of things (NB-IoT) system, and so on.

[0138] See also Figure 1, shows a wireless charging system applicable to the embodiment of the present application. The wireless charging system includes a wireless access network 100 and a core network 200. Optionally, the wireless charging system may also include the Internet 300.

[0139] The wireless access network 100 may include at least one network device and at least one terminal device. For example, the wireless access network 100 includes two network devices 110a and 110b and terminal devices 120a to 120j. Figure 1 The network architecture shown is only for illustration, and the number of terminal devices and / or network devices may be less or more. The communication system described in the embodiment of the present application is to more clearly illustrate the technical solution of the embodiment of the present application, and does not constitute a limitation on the communication system applicable to the embodiment of the present application. For example, the communication system may also include other devices, such as wireless relay devices and wireless backhaul devices. Figure 1 Not drawn in the figure. It is known to those skilled in the art that, with the evolution of network architecture, the technical solutions provided in the embodiments of the present application are also applicable to similar technical problems. When the technical solutions in the embodiments of the present application are applied to other communication systems, the devices, components, modules, etc. in the embodiments can be replaced with corresponding devices, components, modules in other communication systems without limitation.

[0140] At least one network device can be used as an energy providing device to wirelessly charge at least one terminal device. Relatively speaking, at least one terminal device is a device to be charged. The embodiment of the present application does not limit the type of energy providing device, nor does it limit the type of device to be charged. For example, the energy providing device can be a network device. Relatively speaking, the device to be charged can be a terminal device, another network device, or a relay device, etc. Figure 1 Taking the system shown as an example, the device providing energy may be the network device 110a, and the device to be charged may be the terminal device 120a; or, the device providing energy may be the network device 110a, and the device to be charged may be the terminal device 110b. Alternatively, the device providing energy may be a relay network device, and the device to be charged may be a terminal device. For example, the device providing energy may be the network device 110b, and the device to be charged may be the terminal device 120f, wherein the network device 110b may be regarded as a relay device between the network device 110a and the terminal device 120f. In addition, the embodiment of the present application does not limit the number of devices providing energy, nor does it limit the number of devices to be charged. Figure 1 For example, the device providing energy may be the network device 110a, and the devices to be charged may include the network device 110b, the terminal device 120f, the terminal device 120h, and the terminal device 120g.

[0141] The network devices involved in the embodiments of the present application are mainly access network devices. Therefore, in the following text, unless otherwise specified, the "network devices" refer to radio access network (RAN) devices, which can be referred to as access network devices for short. RAN can be a 3GPP-related cellular system, for example, a 5G mobile communication system, or a future-oriented evolution system (such as a 6G mobile communication system). RAN can also be an open access network (open RAN, O-RAN or ORAN), a cloud radio access network (cloud radio access network, CRAN), or a virtualized radio access network (virtualized RAN, vRAN), etc. RAN can also be a communication system that is a fusion of two or more of the above systems. RAN devices can also be called RAN nodes, RAN entities, or access nodes, etc.

[0142] In one possible scenario, the RAN node may be a base station, an evolved NodeB (eNodeB), an access point (AP), a transmission reception point (TRP), a next generation NodeB (gNB), a next generation base station in a 6G mobile communication system, a base station in a future mobile communication system, etc. The RAN node may be a macro base station, a micro base station, an indoor station, a relay node, a donor node / host node, or a wireless controller, etc. The RAN node may also be a server, a wearable device, a vehicle or an onboard device, etc. For example, the RAN node in the V2X technology may be a road side unit (RSU).

[0143] In another possible scenario, the RAN node may be a module or unit that completes part of the functions of the base station; or multiple RAN nodes collaborate to assist the terminal device in achieving wireless access, and different RAN nodes respectively implement part of the functions of the base station. For example, the RAN node may be a centralized unit (CU), a distributed unit (DU) or a radio unit (RU), etc. The functions of the CU may be implemented by one entity, or by different entities. For example, the functions of the CU may be further divided, that is, the control plane and the user plane may be separated and implemented by different entities, namely, the control plane CU entity (i.e., CU-control plane (CP) entity) and the user plane CU entity (i.e., CU-user plane (UP) entity). The CU-CP entity and the CU-UP entity may be coupled with the DU to jointly complete the functions of the RAN node. The CU and the DU may be separately set, or may be included in the same network element, such as a baseband unit (BBU).

[0144] In different systems, CU (or CU-CP and CU-UP), DU or RU may also have different names, but those skilled in the art can understand their meanings. For example, in the ORAN system, CU may also be called O-CU (open CU), DU may also be called O-DU, CU-CP may also be called O-CU-CP, CU-UP may also be called O-CU-UP, and RU may also be called O-RU. For the convenience of description, CU, CU-CP, CU-UP, DU and RU are described as examples in this application. Any unit of CU (or CU-CP, CU-UP), DU and RU in this application may be implemented by a software module, a hardware module, or a combination of a software module and a hardware module.

[0145] CU and DU can be configured according to the protocol layer functions of the wireless network they implement: for example, CU is configured to implement the functions of the packet data convergence protocol (PDCP) layer and the protocol layers above (such as the radio resource control (RRC) layer and / or the service data adaptation protocol (SDAP) layer, etc.); DU is configured to implement the functions of the protocol layers below the PDCP layer (such as the radio link control (RLC), MAC layer, and / or the physical (PHY) layer, etc.). For another example, CU is configured to implement the functions of the protocol layers above the PDCP layer (such as the RRC layer and / or the SDAP layer), and DU is configured to implement the functions of the PDCP layer and the protocol layers below (such as the RLC layer, the MAC layer, and / or the PHY layer, etc.). For a detailed description of each of the above-mentioned protocol layers, reference may be made to the relevant technical specifications of 3GPP or the technical specifications of other applicable communication protocols. The above division of the processing functions of CU and DU according to the protocol layer is only an example, and can also be divided in other ways, which is not limited by the present application. For example, in one design, the CU or DU can also be divided into partial processing functions with protocol layers. In one design, part of the functions of the RLC layer and the functions of the protocol layers above the RLC layer are set in the CU, and the remaining functions of the RLC layer and the functions of the protocol layers below the RLC layer are set in the DU.

[0146] In the embodiments of the present application, the device for realizing the function of the network device can be the network device itself, or a device that can support the network device to realize the function, such as a chip system or a combination device or component that can realize the function of the network device, and the device can be installed in the network device. The embodiments of the present application do not limit the specific technology and specific device form adopted by the network device.

[0147] In the embodiments of the present application, anything that can communicate data with a base station can be regarded as a terminal device. The terminal device is also called a terminal, a terminal device, a user equipment (UE), a mobile station, or a mobile terminal. The terminal device can be widely used in various scenarios, such as D2D communication, V2X communication, machine-type communication (MTC), IoT, virtual reality, augmented reality, industrial control, automatic driving, telemedicine, smart grid, smart furniture, smart office, smart wear, smart transportation, or smart city. For example, the terminal device can be: a mobile phone, a computer, a mobile internet device (MID), a wearable device, a virtual reality (VR) device, an augmented reality (AR) device, a station (STA) mechanical arm, a camera, a robot, or a smart home device (such as a TV, an air conditioner, a sweeper, a speaker, a set-top box), a relay, a customer premise equipment (CPE), etc.

[0148] The various terminal devices introduced above, if located on a vehicle (for example, placed / installed in a vehicle), can all be considered as vehicle-mounted terminal devices. The vehicle-mounted terminal device can be a vehicle-mounted module, a vehicle-mounted module, a vehicle-mounted component, a vehicle-mounted chip or a vehicle-mounted unit built into the vehicle as one or more components or units, and the vehicle can implement the method of the present application through the built-in vehicle-mounted module, vehicle-mounted module, vehicle-mounted component, vehicle-mounted chip or vehicle-mounted unit. The vehicle-mounted terminal device can be a complete vehicle device, a vehicle-mounted module, a vehicle, an on-board unit (on board unit, OBU), a roadside unit (roadside unit, RSU), a vehicle-mounted system (or a vehicle-mounted sending unit) (telematics box, T-box), a chip or a system on chip (system on chip, SOC), etc. The above chip or SOC can be installed in a vehicle, OBU, RSU or T-box.

[0149] In the embodiments of the present application, the device for realizing the function of the terminal device may be the terminal device itself, or may be a device capable of supporting the terminal device to realize the function, such as a chip system or a combination device or component capable of realizing the function of the terminal device, and the device may be installed in the terminal device. The embodiments of the present application do not limit the specific technology and specific device form adopted by the terminal device.

[0150] For example, the device providing energy is a network device, and the device to be charged is a terminal device. In a wireless charging method, the data signal exchanged between the network device and the terminal device can be used as a charging signal. For example, see Figure 2 , which is a flow chart of the communication between network devices and terminal devices. Figure 2 In the process, the terminal device sends a reference signal to the network device, which receives the reference signal, performs channel estimation based on the reference signal, and obtains channel state information (CSI). The network device generates a precoding matrix based on the CSI, performs precoding processing on the modulation symbols to be sent, and finally generates a data signal and sends it to the terminal device. The data signal can be used as a charging signal ( Figure 2 Take this as an example).

[0151] For example, the terminal device sends a modulation symbol s, which is received by the network device after frequency conversion and channel transmission. Taking into account the channel fading and noise interference between the terminal device and the network device, the modulation symbol a received by the network device is a=h×s+z, where h is the channel fading value (also referred to as channel fading) and z is noise. Before the network device sends the charging signal, it is necessary to perform channel estimation to obtain h and perform precoding processing on s. It can be understood that the precoding processing is essentially a channel conjugate processing. Therefore, the network device obtains h, and after precoding s, the modulation symbol h can be obtained. * ×s. "h * " represents the conjugate of "h". The network device can convert the modulation symbol h * ×s, after frequency conversion processing, a data signal is generated and transmitted into the air through the antenna, thereby achieving the purpose of wireless charging. The terminal device receives the data signal and obtains energy. It can be understood that the received power of the data signal is |h| 2 ×s, that is, theoretically, the maximum power that the terminal device can collect based on the received data signal is |h| 2 ×s.

[0152] according to Figure 2 In order to obtain the charging signal in this way, precoding processing is required, which is relatively complicated. In particular, when multiple terminal devices need to be charged, the network device needs to perform channel estimation on the reference signal from each terminal device and perform precoding processing, which is more complicated.

[0153] In view of this, a technical solution of an embodiment of the present application is provided. For the device to be charged, it only needs to obtain energy from the charging signal, and there is no need to care about the content included in the charging signal. Even if there is interference, it will not affect the wireless charging. Therefore, in an embodiment of the present application, the device providing energy can conjugate the modulation symbol from the device to be charged, and use the modulation symbol obtained after the conjugate processing as the modulation symbol of the charging signal. Compared with Figure 2 With respect to the wireless charging implemented in the process shown (precoding processing is required), the embodiment of the present application is simpler and has a lower processing complexity.

[0154] To facilitate understanding of the solution provided in the embodiments of the present application, the principle that a better charging effect can be obtained by using a modulation symbol as a modulation symbol of a charging signal after conjugation processing is first introduced.

[0155] Using the above example, the terminal device sends a modulation symbol s, which is received by the network device after frequency conversion and channel transmission; the modulation symbol a received by the network device is a = h × s + z. In the embodiment of the present application, the network device performs conjugation processing on the modulation symbol a to obtain a * , a * represents the conjugate of a. The network device converts a * The frequency conversion process is performed to generate a charging signal, which is transmitted into the air through the antenna. It can be understood that the receiving power of the charging signal is a * ×h=|h| 2 ×s * +z * ×h, the received power is the maximum power that the terminal device can collect from the charging signal. Figure 2 The described process, the maximum power that the terminal device can collect is |h| 2 ×s. When the signal-to-noise ratio is high, that is, When the value of is large, |h| 2 ×s * +z * The value of ×h is close to |h| 2 ×s. In other words, when the signal-to-noise ratio is high, using the method provided in the embodiment of the present application, the power that can be collected by the terminal device is close to the maximum power that can be collected by the terminal device, which is |h| 2 ×s, therefore, the method provided in the embodiment of the present application can achieve a better charging effect while reducing the processing complexity.

[0156] The technical solution provided by the embodiments of the present application is introduced below in combination with the above content and the accompanying drawings.

[0157] In the embodiments of the present application, "when", "if" and "if" all mean that the device will make corresponding processing under certain objective circumstances. They do not limit the time, nor do they require that the device must have a judgment action when it is implemented, nor do they mean that there are other limitations. Unless otherwise specified, "if" and "if" are interchangeable, and "when" and "in the case of" are interchangeable. "When" and "if" / "if" are interchangeable.

[0158] For the number of nouns, unless otherwise specified, it means "singular noun or plural noun", that is, "one or more". "Multiple" means two or more. In view of this, in the embodiments of the present application, "multiple" can also be understood as "at least two". "At least one" can be one or more, for example, at least one is one, two or more. For example, including at least one means including one, two or more, and there is no limit on which ones are included. For example, including at least one of A, B and C, then A, B, C, A and B, A and C, B and C, or A and B and C can be included. Similarly, the understanding of descriptions such as "at least one" is also similar. "At least one of the following items (items)" or similar expressions refers to any combination of these items, including any combination of single items (items) or plural items (items). For example, "at least one of A, B and C" includes A, B, C, AB, AC, BC or ABC. "And / or" describes the association relationship of associated objects, indicating that there can be three relationships. 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 “ / ”, unless otherwise specified, generally indicates that the previous and next associated objects are in an “or” relationship.

[0159] Unless otherwise specified, ordinal numbers such as "first" and "second" mentioned in the embodiments of the present application are used to distinguish multiple objects, and are not used to limit the order, timing, priority or importance of the multiple objects, and the description of "first" and "second" does not necessarily limit the objects to be different. For example, the first modulation symbol sequence and the second modulation symbol sequence represent two modulation symbol sequences, and do not limit the priority or importance of the two modulation symbol sequences.

[0160] For a technical feature, "A", "B", "C" and "D" are used to distinguish the technical features in the technical feature, and there is no order of precedence or order of importance between the technical features described by "A", "B", "C" and "D". For example, the method A and the method B mentioned below are only used to distinguish different conjugation processing methods, and do not limit the order of precedence or order of importance, priority or importance, etc. between the method A and the method B.

[0161] The wireless charging method provided in the embodiment of the present application can be performed by the device providing energy and the device to be charged. The embodiment of the present application does not limit the type and number of devices providing energy, nor does it limit the type and number of devices to be charged. For example, the device providing energy can be a network device, and the device to be charged can be a terminal device. Among them, the device to be charged can be a terminal device or multiple terminal devices.

[0162] The embodiments of the present application provide a variety of wireless charging methods (for example, the wireless charging method 300, the wireless charging method 1000, and the wireless charging method 1100 described below). For the convenience of description, the embodiments of the present application take the example that the device providing energy is a network device and the device to be charged is a terminal device. In the following introduction, the wireless charging method is performed by the network device and the terminal device respectively as an example. Among them, the steps performed by the network device can be implemented by the RAN device itself, or by components in the RAN device (such as a baseband chip, or other processing units or processors and other modules). For example, the network device can be the network device 110a in 1, or it can also be Figure 1 The steps performed by the terminal device may be implemented by the terminal device itself, or by a component (such as a chip, a processing unit, or a processor module) in the terminal device. The terminal device may be Figure 1 The terminal device 120a shown, or it may be Figure 1 The chip (system) in the terminal device 120a.

[0163] See also Figure 3 , Figure 3 A schematic diagram of the flow of a wireless charging method 300 provided in an embodiment of the present application is shown. Figure 3 The wireless charging method 300 is introduced from the perspective of the interaction between the network device and the terminal device. The wireless charging method 300 can also be performed by other devices that may have communication functions. Figure 3 As shown, the process of the wireless charging method 300 includes the following steps.

[0164] S301. A network device obtains a first signal, where the first signal includes a first modulation symbol sequence.

[0165] The first signal comes from the device to be charged (such as a terminal device), and is a signal for requesting charging. The first signal is also called a charging request signal or a charging request signal, which is not limited in the embodiments of the present application. In addition, the embodiments of the present application do not limit what kind of signal the first signal is. For example, the first signal can reuse an existing signal. For example, the first signal may be a reference signal sent by a terminal device to a network device, and the reference signal may be, for example, a sounding reference signal (SRS). For another example, the first signal may be a pilot signal sent by a terminal device to a network device. Alternatively, the first signal may also be a signal dedicated to requesting charging.

[0166] If the first signal reuses an existing signal, for example, the first signal is an SRS or a pilot signal, when the network device cannot determine the purpose of the first signal, it may cause the network device to behave incorrectly or the network device may not respond to the first signal. For example, the first signal is used to request charging, and the network device believes that the first signal is a pilot signal, and the network device will not respond to the charging request of the terminal device. In order to avoid the network device from misunderstanding the purpose of the first signal, the embodiments of the present application provide the following two implementation methods.

[0167] Method 1: The terminal device indicates to the network device through signaling that the first signal is used to request charging.

[0168] For example, the terminal device sends first indication information to the network device, and the first indication information is used to indicate that the first signal is used to request charging. Accordingly, the network device receives the first indication information and can determine that the first signal is used to request charging according to the first indication information.

[0169] The embodiment of the present application does not limit the signaling that carries the first indication information. For example, the first indication information may be carried in uplink control information (UCI), or the first indication information is UCI. The first indication information may be initiated to the network device together with the first signal, that is, the terminal device sends the first signal and the first indication information to the network device through one signaling. Alternatively, the first signal may be sent to the network device alone, and the first indication information may also be sent to the network device alone.

[0170] Method 2: Indicating that the first signal is used to request charging based on the resource carrying the first signal.

[0171] In the second approach, resources for transmitting the charging request signal may be (pre-)configured, and accordingly, the network device may determine whether the first signal is used to request charging according to the resources carrying the first signal.

[0172] For example, the first time-frequency resource is pre-configured as a resource for transmitting a charging request signal, the terminal device sends a first signal on the first time-frequency resource, the network device receives the first signal on the first time-frequency resource, and determines that the first signal is used to request charging.

[0173] For another example, the network device may also dynamically configure the resources for transmitting the charging request signal through signaling, the terminal device sends the first signal on the configured resources, the network device receives the first signal on the configured resources, and determines that the first signal is used to request charging. For example, the network device sends configuration information to the terminal device, and the configuration information is used to indicate the second time-frequency resource, and the second time-frequency resource is used to transmit the charging request signal. The terminal device receives the configuration information, and when the terminal device needs to be charged, it can send the first signal on the second time-frequency resource. The network device receives the first signal on the second time-frequency resource and determines that the first signal is used to request charging. The embodiment of the present application does not limit the signaling that carries the configuration information. For example, the configuration information may be carried in one or more of the radio resource control (RRC) signaling, downlink control information (DCI) or MAC control element (CE). It should be noted that the second time-frequency resource and the first time-frequency resource can be the same resource or different time-frequency resources.

[0174] In one implementation, the first time-frequency resource can be pre-configured, and the second time-frequency resource can be configured to coexist. In this case, the terminal device can send the first signal on the first time-frequency resource for the first time. Subsequently, the terminal device can send the first signal on the second time-frequency resource to avoid the first time-frequency resource being occupied by one or more terminal devices, especially when multiple terminal devices share the first time-frequency resource. For example, for a passive terminal device, after charging by receiving electromagnetic waves, the first signal can be sent on the first time-frequency resource for the first time; after the terminal device is connected to the network, the first signal can be sent on the second time-frequency resource. In this way, it can be avoided that the first time-frequency resource is always occupied by one or more terminal devices, causing congestion, thereby avoiding some passive terminal devices from being unable to request charging due to the inability to use the first time-frequency resource.

[0175] In one implementation, the first method is adopted by default, and the second method is not adopted or does not exist. In this case, the network device does not need to send configuration information. That is, the network device sending configuration information is not a step that must be performed, but an optional step. Alternatively, the second method is adopted by default, the first method is not adopted or does not exist, and the terminal device does not need to send the first indication information. That is, the terminal device sending the first indication information is not a step that must be performed, but an optional step.

[0176] In another implementation, method 1 and method 2 may coexist. For example, the terminal device sends a first signal on the first time-frequency resource or the second time-frequency resource, and the terminal device also sends first indication information.

[0177] The first signal is described below.

[0178] The first signal may include a first modulation symbol sequence. The first modulation symbol sequence may be a modulation symbol or a sequence consisting of multiple modulation symbols. Depending on the charging scenario, the first signal / first modulation symbol sequence may also be different, and a specific charging scenario is used as an example for explanation below.

[0179] Scenario 1: The device to be charged is a terminal device.

[0180] When the device to be charged is a terminal device, the first signal includes the modulation symbol sent by the terminal device. Accordingly, the first modulation symbol sequence is a sequence of modulation symbols sent by the terminal device to the network device. Taking the terminal device to be charged as terminal device 1 as an example, the signal sent by terminal device 1 to the network device includes the modulation symbol a1, then the first modulation symbol sequence includes the modulation symbol a=a1.

[0181] Scenario 2: The devices to be charged are multiple terminal devices.

[0182] When the device to be charged is a plurality of terminal devices, the first signal includes modulation symbols sent by each of the plurality of terminal devices to the network device. Accordingly, each modulation symbol in the first modulation symbol sequence is a superposition of modulation symbols from a plurality of terminal devices. Taking the case where the plurality of terminal devices include terminal device 1 and terminal device 2 as an example, the signal sent by terminal device 1 to the network device includes modulation symbol a1, and the signal sent by terminal device 1 to the network device includes modulation symbol a2, then the first modulation symbol sequence includes modulation symbol a=a1+a2. In scenario two, a plurality of terminal devices can use the same block of time-frequency resources to send the first signal to the network device, which can save resource overhead compared to each terminal device using different time-frequency resources.

[0183] When the network device determines that the terminal device needs to be charged, the network device can obtain the first signal and obtain the first modulation symbol sequence in the first signal. The network device obtaining the first signal includes the network device receiving the first signal. For example, when the terminal device needs to be charged, the first signal can be sent to the network device, and accordingly, the network device receives the first signal.

[0184] In one implementation, the network device receives the first signal and believes that the terminal device needs to be charged. It can promptly obtain the first modulation symbol sequence in the first signal to charge the terminal device in time, thereby improving the charging efficiency.

[0185] In another implementation, the network device receives the first signal, may store the first signal, and obtain the first signal when the terminal device needs to be charged. For example, the network device may periodically obtain the first signal, generate a charging signal each time the first signal is obtained, and send the charging signal to the terminal device. This implementation does not require the terminal device to send the first signal multiple times to achieve the purpose of multiple charging, so as to minimize the impact on the power consumption of the terminal device. Of course, the network device receives the first signal and may also store the first modulation symbol sequence in the first signal, and obtain the first modulation symbol sequence when the terminal device needs to be charged.

[0186] S302: The network device sends at least one charging signal, where the charging signal includes a second modulation symbol sequence, where the second modulation symbol sequence is obtained by conjugating at least one modulation symbol in the first modulation symbol sequence.

[0187] As mentioned above, generating a charging signal based on the conjugated modulation symbol can also achieve a better charging effect. To this end, the network device can conjugate at least one modulation symbol in the first modulation symbol sequence to obtain a second modulation symbol sequence; and then generate a charging signal based on the second modulation symbol sequence.

[0188] The embodiment of the present application does not limit the specific manner of performing conjugation processing on at least one modulation symbol in the first modulation symbol sequence. The following exemplarily introduces several manners of performing conjugation processing on at least one modulation symbol in the first modulation symbol sequence, including but not limited to the following manners A to C. i ) * Indicates a i The conjugation of.

[0189] In mode A, at least one modulation symbol in the first modulation symbol sequence is conjugated, and the conjugated modulation symbol can be used as the second modulation symbol sequence.

[0190] The second modulation symbol sequence may be a modulation symbol that is the conjugate of a modulation symbol in the first modulation symbol sequence. For example, the first modulation symbol sequence is [a1, a2, a3], and the second modulation symbol sequence may be (a1) * 、(a2) * or (a3) *. In one implementation, the second modulation symbol sequence is the conjugate of the last modulation symbol in the first modulation symbol sequence. For example, the last modulation symbol in the first modulation symbol sequence is the second modulation symbol, the second modulation symbol sequence is the first modulation symbol, and the first modulation symbol is the conjugate of the second modulation symbol. Continuing with the above example, that is, the first modulation symbol sequence is [a1, a2, a3], assuming that a3 is the last modulation symbol in the first modulation symbol sequence (i.e., the second modulation symbol), then the first modulation symbol (i.e., the second modulation symbol sequence) is (a3) * Due to (a3) * The distance between a3 is the shortest, therefore, the transmission channel of the second modulation symbol sequence and the transmission channel of the second modulation symbol are more strongly correlated, and a better charging effect can be achieved.

[0191] After obtaining the second modulation symbol sequence, the network device may generate a charging signal. The network device may send one charging signal or multiple charging signals, which is not limited in the embodiments of the present application.

[0192] For easier understanding, see Figure 4 , is a schematic diagram of a first modulation symbol sequence and a second modulation symbol sequence. Figure 4 Take the first modulation symbol sequence as [a1, a2, a3] as an example, where the second modulation symbol sequence is a modulation symbol obtained by conjugating a3. Figure 4 In the symbol a3 * It illustrates a second modulation symbol sequence, that is, a charging signal. Figure 4 Take the example of a network device sending four charging signals.

[0193] In another implementation, the second modulation symbol sequence includes multiple modulation symbols, and the multiple modulation symbols are conjugates of the multiple modulation symbols in the first modulation symbol sequence. For example, the first modulation symbol sequence is [a1, a2, a3], and the second modulation symbol sequence can be [(a1) * 、(a2) * 、(a3) * ] in multiple modulation symbols.

[0194] For example, see Figure 5 , is a schematic diagram of a first modulation symbol sequence and a second modulation symbol sequence. Figure 5 Take the first modulation symbol sequence as [a1, a2, a3] as an example, wherein the second modulation symbol sequence is modulation symbols obtained by conjugating a1, a2 and a3 respectively. Figure 5 In [a1 * 、a2 * 、a3 * ] is the second modulation symbol sequence, that is, a charging signal. Figure 5 Take the case where a network device sends a charging signal as an example.

[0195] In the process of generating the charging signal in method A, no channel estimation or precoding processing is required, thereby reducing the processing complexity of the network equipment and improving the charging efficiency.

[0196] Mode B, conjugating and amplitude scaling are performed on at least one modulation symbol in the first modulation symbol sequence, and the at least one modulation symbol after conjugation and amplitude scaling can be used as the second modulation symbol sequence.

[0197] In mode B, performing conjugate processing on at least one modulation symbol in the first modulation symbol sequence is performing conjugate processing and amplitude scaling processing on at least one modulation symbol in the first modulation symbol sequence. Taking performing conjugate amplitude scaling processing on the second modulation symbol in the first modulation symbol sequence to obtain the first modulation symbol in the second modulation symbol sequence as an example, assuming that the amplitude scaling factor is sk and the second modulation symbol is a1, the network device performs conjugate processing on a1 to obtain the modulation symbol (a1) * ; Then use the amplitude scaling factor to adjust (a1) * Perform amplitude scaling to obtain (a1) * ×sk. (a1) * ×sk is used as the first modulation symbol in the second modulation symbol sequence. The transmission power of the second modulation symbol sequence can be flexibly adjusted through amplitude scaling, so that the power of the charging signal is larger, so that the terminal device can collect more power and the charging effect is better. Among them, at different times or different charging requirements, the amplitude scaling factor used for conjugating the modulation symbols in the first modulation symbol sequence can be different, so that the power of the charging signal can be larger.

[0198] The above example takes the modulation symbol as an example of first conjugating and then performing amplitude scaling. It should be noted that the embodiment of the present application does not limit the order of processing conjugation and amplitude scaling. For any modulation symbol in the first modulation symbol sequence, amplitude scaling can also be performed first and then conjugated. Continuing with the above example, for a1, firstly, the amplitude of a1 is scaled by the amplitude scaling factor to obtain (a1×sk); then (a1×sk) is conjugated to obtain (a1×sk) * . (a1×sk) * as a modulation symbol in the second modulation symbol sequence.

[0199] Similar to method A, in method B, the second modulation symbol sequence may also be a modulation symbol, which is obtained by conjugating and scaling a modulation symbol in the first modulation symbol sequence. For example, the first modulation symbol sequence is [a1, a2, a3], and the second modulation symbol sequence may be (a1) * ×sk、(a2) * ×sk or (a3) * ×sk. In one implementation, the modulation symbol included in the second modulation symbol sequence is the conjugate of the last modulation symbol in the first modulation symbol sequence. Using the above example, the first modulation symbol sequence is [a1, a2, a3], and the second modulation symbol sequence is (a3) * ×sk to achieve better charging effect.

[0200] Alternatively, the second modulation symbol sequence is a plurality of modulation symbols, and the plurality of modulation symbols are obtained by respectively conjugating and amplitude scaling the plurality of modulation symbols in the first modulation symbol. For example, the first modulation symbol sequence is [a1, a2, a3], and the second modulation symbol sequence is [(a1) * ×sk、(a2) * ×sk、(a3) * ×sk]. It can be understood that when the second modulation symbol sequence is a plurality of modulation symbols, the amplitude scaling factors of the plurality of modulation symbols corresponding to the plurality of modulation symbols in the first modulation symbol sequence may be the same or different.

[0201] Similar to method A, method B also does not require channel estimation and precoding processing, which can reduce the processing complexity of network equipment and improve charging efficiency. In addition, in addition to conjugating the modulation symbols in the first modulation symbol sequence, method B also performs amplitude scaling processing, which can flexibly adjust the transmission power of the second modulation symbol sequence to meet actual charging needs. For example, if it is necessary for the terminal device to collect more power, a larger amplitude scaling factor can be selected to make the charging signal more powerful.

[0202] Mode C, conjugate and weighted average at least two modulation symbols in the first modulation symbol sequence to obtain a second modulation symbol sequence. The second modulation symbol sequence includes a first modulation symbol, which is obtained by conjugating and weighted averaging at least two modulation symbols in the first modulation symbol sequence. "Weighted average" means multiplying each modulation symbol by a corresponding weight and then summing them.

[0203] For example, taking the first modulation symbol sequence as [a1, a2], the network device may conjugate a1 and a2 respectively to obtain (a1) * and (a2) * ; Then for (a1)* and (a2) * Perform weighted average. * The weight is f1, (a2) * The weight of is f2, then (a1) * and (a2) * The weighted average of is (a1) * ×f1+(a2) * ×f2. The first modulation symbol in the second modulation symbol sequence is (a1) * ×f1+(a2) * ×f2.

[0204] The above takes the example of first conjugating the modulation symbols and then performing weighted averaging. It should be noted that the embodiment of the present application does not limit the order of processing conjugation and weighted averaging. For at least two modulation symbols in the first modulation symbol sequence, weighted averaging can also be performed first and then conjugated. Continuing with the above example, the network device can perform weighted averaging on a1 and a2 respectively to obtain a1×f1+a2×f2; then conjugate a1×f1+a2×f2 to obtain (a1×f1+a2×f2) * =(a1×f1) * +(a2×f2) * The first modulation symbol in the second modulation symbol sequence is (a1×f1) * +(a2×f2) * .

[0205] In mode C, the second modulation symbol sequence may be a modulation symbol. The modulation symbol is based on the conjugate and weighted average of all modulation symbols in the first modulation symbol sequence. For example, the first modulation symbol sequence is [a1, a2], and the second modulation symbol sequence may be (a1×f1) * +(a2×f2) * Alternatively, the second modulation symbol sequence is a modulation symbol, which is a conjugate and weighted average of a portion of the modulation symbols in the first modulation symbol sequence. For example, the first modulation symbol sequence is [a1, a2, a3], and the second modulation symbol sequence may be (a1×f1) * +(a2×f2) * .

[0206] Alternatively, the second modulation symbol sequence is a plurality of modulation symbols, which are obtained by conjugating and weighted averaging a plurality of groups of modulation symbols in the first modulation symbol sequence, wherein a group modulation symbol includes at least one modulation symbol. For example, the first modulation symbol sequence is [a1, a2, a3, a4, a5], and the weighted values ​​corresponding to these five modulation symbols are f1, f2, f3, f4 and f5, respectively. Considering a1 and a2 as a group of modulation symbols, and a4 and a5 as a group of modulation symbols, the second modulation symbol sequence can be (a5×f5) * +(a4×f4) * and (a1×f1) * +(a2×f2) * It should be noted that the above is only an example. The embodiment of the present application does not limit the number of modulation symbols included in a group of modulation symbols. The number of modulation symbols included in different groups of modulation symbols may be different.

[0207] Similar to method A, method C also does not require channel estimation and precoding processing, which can reduce the processing complexity of network equipment and improve charging efficiency. In addition, method C can reduce noise by weighted averaging at least two modulation symbols in the first modulation symbol sequence, so that the signal-to-noise ratio of the second modulation symbol sequence is higher. Accordingly, the power of the charging signal generated by the second modulation symbol sequence is greater, so that the charging effect is better.

[0208] It is understandable that, due to the directional nature of the beam, Figure 2 The charging signal obtained by the process (i.e., the precoding scheme) can only achieve energy focusing in the spatial dimension. To this end, the embodiment of the present application can be obtained by conjugating more modulation symbols in the first modulation symbol sequence, so as to make full use of the channel information within a period of time as much as possible, achieve energy focusing in the time dimension, reduce the loss of the charging effect, and achieve a better charging effect. When the second modulation symbol sequence is obtained by conjugating at least two modulation symbols in the first modulation symbol sequence, the symbol sequence obtained by conjugating at least two modulation symbols in the first modulation symbol sequence can also be inversely processed. The modulation symbol sequence obtained after the inverse processing is used as the second modulation symbol sequence. That is, the second modulation symbol sequence is obtained by conjugating at least two modulation symbols in the first modulation symbol sequence and then inverting them. The inverse processing can make full use of the channel information within a period of time, so that the second modulation symbol sequence can achieve energy focusing in the time dimension, compared with the first modulation symbol sequence. Figure 2 process, the charging effect is better.

[0209] For example, the first modulation symbol sequence is [a1, a2, a3], and a1, a2 and a3 are conjugated. According to method A, after a1, a2 and a3 are conjugated respectively, the symbol sequence (a1) is obtained. * 、(a2) * and (a3) * ; Then perform the reverse processing to obtain the second modulation symbol sequence [(a3) * 、(a2) * 、(a1) * ]. If a1, a2 and a3 are conjugated according to method B, the symbol sequence (a1) is obtained. * 、(a2) * and (a3) * , and then perform amplitude scaling to obtain the symbol sequence [(a1) * ×sk、(a2) * ×sk、(a3) * ×sk]; and then perform the reverse processing to obtain the second modulation symbol sequence [(a3) * ×sk、(a2) * ×sk、(a1) * ×sk]. If a1, a2 and a3 are conjugated and weighted averaged according to method C, the second modulation symbol sequence (a1×f1) can be obtained. * +(a2×f2) * +(a3×f3) * , where f1, f2, f3 are weights corresponding to a1, a2, and a3.

[0210] Through the reverse processing, the second modulation symbol sequence can achieve energy focusing in the time dimension, thereby improving the charging effect. For ease of understanding, the principle that the reverse processing can improve the charging effect is introduced below.

[0211] Assume that the terminal device sends a symbol sequence s(n), which is received by the network device after up-conversion and channel processing. The network device down-converts the received signal to obtain a symbol sequence a(n)=h(n)*s(n)+z(n). Among them, h(n) is the channel fading, z(n) is the receiving noise, and * represents convolution. According to matched filtering, when the charging signal is h * (-n)*s(n), the power that the terminal device can collect from the charging signal is the largest. That is, when n=0, the pulse of the charging signal is the highest. In the embodiment of the present application, a(n) is conjugated to obtain a * (n), then * (n) is processed in reverse order, and the resulting symbol sequence is a * (-n) = h(-n)* *s * (-n)+z * (-n). Since charging does not need to carry information, s(n) can be a constant s, then a * (-n) = h(-n) * ·s++z * (-n). Compare to a * (-n) and a(n), we can see that a * Compared with a(n), (-n) adds a noise term. Therefore, although the modulation symbols are conjugated and then reversed, a good charging effect can still be achieved.

[0212] In one implementation, the first modulation symbol sequence is a modulation symbol sequence obtained by performing channel estimation on the first signal. That is, after the network device obtains the first signal, it can obtain the first modulation symbol sequence from the first signal according to the channel estimation result. Each modulation symbol in the first modulation symbol sequence is a channel fading value. For example, before channel estimation, the first modulation symbol sequence is [a1, a2, a3]; after channel estimation, the first modulation symbol sequence is [h1, h2, h3…], where h1 is the channel fading value of a1, h2 is the channel fading value of a2, and h3 is the channel fading value of a3. By performing channel estimation on the first signal, the influence of interference and noise on the first modulation symbol sequence can be reduced, so that the noise of the second modulation symbol sequence obtained according to the first modulation symbol sequence is also low, so that the power of the charging signal generated based on the second modulation symbol sequence is larger and the charging effect is better.

[0213] After the network device obtains the second modulation sequence number sequence, it generates a charging signal according to the second modulation symbol sequence and sends the charging signal. The network device can send one charging signal or multiple charging signals. In one implementation, the antenna used to send the charging signal is the same as the antenna used to receive the first signal, or the antenna used to send the second modulation symbol sequence is the same as the antenna used to receive the first modulation symbol sequence. For example, if the first modulation symbol in the first modulation symbol sequence is received from the pth antenna, then the second modulation symbol in the second modulation symbol sequence is sent from the pth antenna. Alternatively, for the symbol a obtained from the pth antenna p , according to a p The modulation symbol obtained by conjugation processing (for example, ) after frequency conversion processing, it is still sent through the pth antenna. p is an integer greater than or equal to 0, that is, the antennas can be numbered starting from 0. Through this scheme, the phase deviation between the transmitting and receiving antennas can be minimized, and the correlation between the transmission channel of the second modulation symbol sequence and the transmission channel of the first modulation symbol sequence is strong, so that the power of the charging signal is as large as possible to achieve a better charging effect.

[0214] In addition, the time-frequency resources occupied by the charging signal are different, and the charging effect that can be achieved is also different. According to the different time-frequency resources occupied by the first signal, the time-frequency resources occupied by the charging signal are also different. Among them, the different time-frequency resources include different time domain resources and / or frequency domain resources. The following introduces the frequency domain resources and time domain resources separately.

[0215] 1) Frequency domain resources:

[0216] In case 1, the first modulation symbol sequence occupies one subcarrier.

[0217] In this case, the subcarriers occupied by the second modulation symbol sequence are separated from the subcarriers occupied by the first modulation symbol sequence by m subcarriers, where m is an integer, for example, m=0, m=1 or other possible values. For example, the first modulation symbol sequence includes the modulation symbol obtained from the kth subcarrier. Accordingly, the second modulation symbol sequence includes modulation symbols It can be mapped on the k+mth subcarrier of the j+nth symbol, that is, Wherein, n is a positive integer.

[0218] m may be (pre) configured or predefined. For example, the network device may send sixth indication information to the terminal device, and the sixth indication information is used to indicate m. The embodiment of the present application does not limit which signaling m is carried on. For example, the sixth indication information may be carried on one or more of RRC signaling, DCI signaling or MAC CE. It should be noted that it is not a necessary step for the network device to send the sixth indication information to the terminal device.

[0219] In one implementation, m=0, that is, the subcarriers occupied by the second modulation symbol sequence are the subcarriers occupied by the first modulation symbol sequence, so as to obtain a better charging effect. It can be understood that the channels are correlated in the frequency domain, and similar channels have greater correlation and lower noise. Therefore, when the subcarriers occupied by the second modulation symbol sequence are the same as the subcarriers occupied by the first modulation symbol sequence, the noise of the charging signal can be lower, thereby achieving a better charging effect.

[0220] For example, see Figure 4 , Figure 4 In the figure, the first modulation symbol sequence is [a1, a2, a3], and the second modulation symbol sequence is a modulation symbol obtained by conjugating the symbol a3. Figure 4 In (a3) * It illustrates a second modulation symbol sequence, that is, a charging signal. Figure 4 Take the example of a network device sending 4 charging signals. Figure 4As shown, the subcarriers occupied by the second modulation symbol sequence are the subcarriers occupied by the first modulation symbol sequence.

[0221] For another example, please continue to see Figure 5 , Figure 5 In the figure, the first modulation symbol sequence is [a1, a2, a3], and the second modulation symbol sequence is the modulation symbols obtained by conjugating and reversing the symbols a1, a2 and a3. Figure 5 In the second modulation symbol sequence, * 、(a2) * 、(a1) * ], Figure 5 Take the example of a network device sending two charging signals. Figure 5 As shown, the subcarriers occupied by the second modulation symbol sequence are the subcarriers occupied by the first modulation symbol sequence.

[0222] It should be noted that if the subcarrier occupied by the first modulation symbol sequence is used, the second modulation symbol sequence can be sent at a position closest to the subcarrier occupied by the first modulation symbol sequence to ensure a better charging effect as much as possible. In addition to the subcarrier used to carry the second modulation symbol sequence, the remaining subcarriers can be used to carry data or can be empty carriers that do not carry information.

[0223] Case 2: the first modulation symbol sequence occupies multiple subcarriers.

[0224] In this case, the second modulation symbol sequence may occupy at least one subcarrier among the multiple subcarriers occupied by the first modulation symbol sequence to maximize the charging power or reserve more available resources for service data.

[0225] For example, see Figure 6 , is a first schematic diagram of time-frequency resources occupied by a first modulation symbol sequence and a second modulation symbol sequence. Figure 6 Take the first modulation symbol sequence including the modulation symbols [a1, a2, a3] obtained from the kth subcarrier and the modulation symbols [a1, a2, a3] obtained from the k+qth subcarrier as an example. The second modulation symbol sequence is the modulation symbol obtained by conjugating a3. Figure 6 In (a3) * It illustrates a second modulation symbol sequence, that is, a charging signal. Figure 6 Take the example of a network device sending four charging signals.

[0226] like Figure 6 As shown in (a) in FIG. 1 , the second modulation symbol sequence may occupy the kth subcarrier to leave more available resources for the transmission of service data and reduce resource conflicts. Figure 6As shown in (b) in FIG. 1 , the second modulation symbol sequence may occupy the k+qth subcarrier to reserve more available resources for the transmission of service data and reduce resource conflicts. Figure 6 As shown in (c) in FIG. 8 , the second modulation symbol sequence may occupy the kth subcarrier and the k+qth subcarrier to increase the charging power.

[0227] In one implementation, the subcarrier occupied by the second modulation symbol sequence is spaced at least one subcarrier from a subcarrier (eg, the lowest subcarrier or the highest subcarrier) among the multiple subcarriers occupied by the first modulation symbol sequence.

[0228] 2) Time domain resources: the time domain starting position of the second modulation symbol sequence and the time domain ending position in the first modulation symbol sequence are separated by n symbols, where n is an integer greater than or equal to 0.

[0229] For example, the first modulation symbol sequence includes the modulation symbol obtained from the kth subcarrier Accordingly, the second modulation symbol sequence includes modulation symbols It can be mapped on the kth subcarrier of the j+Δth symbol, that is, Δ is a positive integer. For another example, the first modulation symbol sequence includes the modulation symbol obtained from the kth subcarrier The second modulation symbol sequence is Mapped to the kth subcarrier of the j+Δ, j+Δ+1, and j+Δ+2th symbols in sequence.

[0230] n may be (pre) configured or predefined. For example, the network device may send fifth indication information to the terminal device, and the fifth indication information is used to indicate n. The embodiment of the present application does not limit which signaling n is carried on. For example, the fifth indication information may be carried on one or more of RRC signaling, DCI signaling or MAC CE. It should be noted that the network device sending the fifth indication information to the terminal device is not a necessary step.

[0231] In one implementation, n=0, that is, the time domain starting position of the second modulation symbol sequence is the time domain ending position in the first modulation symbol sequence. In this way, the charging signal can be sent faster to improve the charging efficiency. Figure 4 or Figure 5 In one implementation, n is greater than 0, for example, Δ=2, such as Figure 7 shown. Figure 7 and Figure 4 The difference is that Figure 7 Take the example that the second modulation symbol sequence is separated from the first modulation symbol sequence by 2 symbols in the time domain, and the rest can refer to Figure 4 Description.

[0232] Figure 4 and Figure 5 Take the second modulation symbol sequence as continuous in the time domain. In one implementation, the second modulation symbol sequence is discrete in the time domain. For example, see Figure 8 , is a third schematic diagram of the time-frequency resources occupied by the first modulation symbol sequence and the second modulation symbol sequence. Figure 8 and Figure 4 The difference is that Figure 8 Take the second modulation symbol sequence as an example, which is discrete in the time domain. Figure 4 In addition to the symbols used to carry the second modulation symbol sequence, the remaining symbols can be used to carry data. When the second modulation symbol sequence is discrete in the time domain, service data can be transmitted as early as possible, reducing the transmission delay of service data. Similarly, see Fig. 9 , is a fourth schematic diagram of the time-frequency resources occupied by the first modulation symbol sequence and the second modulation symbol sequence. Fig. 9 The first modulation symbol sequence is [a1, a2, a3], and the second modulation symbol sequence is [(a3) * 、(a2) * 、(a1) * ] as an example. Fig. 9 and Figure 5 The difference is that Fig. 9 Take the second modulation symbol sequence as an example, which is discrete in the time domain. Figure 5 Description.

[0233] As mentioned above, in the wireless charging method 300 provided in the embodiment of the present application, the modulation symbols from the device to be charged are conjugated, and a charging signal is generated according to the conjugated modulation symbols. Compared with the need for precoding processing in the process of generating charging signals by traditional devices providing capabilities, the complexity is lower and it can be applied to terminal devices with lower processing capabilities. In addition, compared with the charging signal obtained by precoding processing, the embodiment of the present application can also focus the capability in the time dimension to further improve the charging effect.

[0234] The wireless charging method 300 provided in the embodiment of the present application can be applied to charging a terminal device. The embodiment of the present application also provides a wireless charging method 1000, which can be applied to charging multiple terminal devices. Fig.10 The process is used as an example to introduce the wireless charging method 1000 applied to charging multiple terminal devices. Fig.10 The plurality of terminal devices include a first terminal device and a second terminal device. Fig.10 The process of the provided wireless charging method 1000 includes the following steps.

[0235] S1001. A network device broadcasts or multicasts configuration information, where the configuration information is used to indicate a second time-frequency resource, where the second time-frequency resource is used to transmit a charging request signal.

[0236] The first terminal device receives the configuration information, and when the first terminal device needs to be charged, the first signal is sent on the second time-frequency resource. The second terminal device receives the configuration information, and when the second terminal device needs to be charged, the first signal is sent on the second time-frequency resource. As described in the aforementioned wireless charging method 300, the second time-frequency resource can be preconfigured or predefined, so S1001 is not a step that must be performed. Fig.10 It is indicated by a dotted line.

[0237] S1002. The first terminal device sends a first charging request signal to the network device on the second time-frequency resource.

[0238] S1003. The second terminal device sends a second charging request signal to the network device on the second time-frequency resource.

[0239] The first charging request signal is used to request charging, and the second charging request signal is used to request charging. The first charging request signal and the second charging request signal are similar to the first signal mentioned above, and the details can be referred to the relevant content of the first signal, which will not be repeated here.

[0240] S1004. The network device obtains a first modulation symbol sequence according to the first charging request signal and the second charging request signal.

[0241] The network device receives the first charging request signal and the second charging request signal on the second time-frequency resource, or the network device receives the superposition of the first charging request signal and the second charging request signal on the second time-frequency resource. The network device obtains the modulation symbols on each subcarrier from the superposition signal of the first charging request signal and the second charging request signal, that is, obtains the first modulation symbol sequence.

[0242] S1005. The network device performs conjugation processing on at least one modulation symbol in the first modulation symbol sequence to obtain a second modulation symbol sequence.

[0243] The network device obtains a first modulation symbol sequence, performs conjugation processing on at least one modulation symbol in the first modulation symbol sequence, and obtains a second modulation symbol sequence. For details, please refer to the relevant content in the aforementioned S302, which will not be repeated here.

[0244] S1006. The network device broadcasts or multicasts at least one charging signal.

[0245] The network device obtains the second modulation symbol sequence, generates a charging signal after frequency conversion and other processing, and sends at least one charging signal. S1006 can refer to the relevant content in S302 for details, which will not be repeated here. The first terminal device receives at least one charging signal to achieve charging. The second terminal device receives at least one charging signal to achieve charging.

[0246] In the above-mentioned wireless charging method 300 and wireless charging method 1000, when the terminal device needs to be charged, a first signal / charging request signal is sent to the network device for example. In a possible scenario, the remaining energy of the terminal device is very low, and it is even unable to send a charging request signal, and cannot actively request charging from the network device. For this reason, an embodiment of the present application also proposes a wireless charging method 1100. In the wireless charging method 1100, the terminal device indicates to the network device that the terminal device needs to be charged by reflecting a signal from the network device. There is no need for the terminal device to actively send a charging request signal, which can avoid the energy consumption caused by the terminal device actively sending a charging request signal.

[0247] See also Fig.11 , is a flow chart of a wireless charging method 1100 provided in an embodiment of the present application. In the wireless charging method 1100, it is taken that the device providing energy is a network device and the device to be charged is a terminal device as an example. The wireless charging method 1100 can be applied to charging one or more terminal devices. Fig.11 The process of the provided wireless charging method 1100 includes the following steps.

[0248] S1101. The network device sends a second signal.

[0249] The second signal may be any signal sent by a network device, and this embodiment of the present application does not limit this.

[0250] S1102. The terminal device reflects the second signal.

[0251] When the terminal device needs to be charged, the second signal from the network device can be reflected. The network device receives the reflected signal of the second signal and believes that the terminal device needs to be charged. The function of the reflected signal of the second signal is similar to the first signal mentioned above, which is used to request charging. The first signal mentioned above can also be the reflected signal of the second signal. For the convenience of description, in the embodiment of the present application, the reflected signal of the second signal is referred to as the first signal.

[0252] In one implementation, the terminal device may reflect all modulation symbols included in the second signal, or may reflect part of the modulation symbols included in the second signal. For example, the second signal includes modulation symbols [a1, a2, a3], and the first signal includes at least one modulation symbol a3. For another example, the second signal includes modulation symbols [a1, a2, a3], and the first signal includes [a1, a2, a3]. a1, a2, and a3 may be the same or different.

[0253] The embodiment of the present application does not limit the frequency domain resource to which the reflected signal of the second signal (ie, the first signal) is mapped. Depending on the charging scenario, the frequency domain resource to which the first signal is mapped is also different, and the following is an example of a specific charging scenario.

[0254] Scenario 1: The device to be charged is a terminal device.

[0255] When the second signal occupies one subcarrier, the subcarrier occupied by the first signal and the subcarrier occupied by the second signal are separated by k subcarriers, where k is an integer. Among them, k can be (pre) configured. For example, the network device sends a second indication information to the terminal device, and the second indication information is used to indicate k. The embodiment of the present application does not limit the specific signaling that carries the second indication information. For example, the second indication information can be carried in one or more of RRC signaling, DCI signaling, or MAC CE.

[0256] In one implementation, k = 0. For example, see Fig.12 , showing the frequency domain positions of the first signal and the second signal. Fig.12 The modulation symbols included in the second signal are [a1, a2, a3], and the modulation symbols included in the first signal are [a3, a3, a3, a3]. Fig.12 It can be seen that the subcarrier occupied by the first signal is the same as the subcarrier occupied by the second signal.

[0257] In one implementation, k ≠ 0. For example, see Fig.13 , showing the frequency domain positions of the first signal and the second signal. Fig.13 The modulation symbols included in the second signal are [a1, a2, a3], and the modulation symbols included in the first signal are [a3, a3, a3, a3]. Fig.13 It can be seen that the subcarrier occupied by the first signal and the subcarrier occupied by the second signal are separated by 2 subcarriers.

[0258] Scenario 2: The devices to be charged are multiple terminal devices.

[0259] When the device to be charged is a plurality of terminal devices, different terminal devices may reflect the second signal to different frequency domain positions. Taking the first signal coming from the first terminal device and the second terminal device as an example, the first signal may include a first component and a second component, the first component corresponds to the first terminal device, the second component corresponds to the second terminal device, the subcarrier occupied by the first component and the subcarrier occupied by the second signal are separated by k1 subcarriers, the subcarrier occupied by the second component and the subcarrier occupied by the second signal are separated by k2 subcarriers, k1 and k2 are different, and both k1 and k2 are integers.

[0260] Among them, k1 and k2 can be (pre) configured. For example, the network device sends third indication information to the terminal device, and the third indication information is used to indicate k1. The network device sends fourth indication information to the terminal device, and the fourth indication information is used to indicate k2. The embodiment of the present application does not limit the specific signaling that carries the third indication information and the fourth indication information. For example, the third indication information or the fourth indication information can be carried in one or more of RRC signaling, DCI signaling, or MAC CE.

[0261] S1103. The network device obtains a first modulation symbol sequence according to the first signal.

[0262] Please refer to the relevant content in the aforementioned S301 for details, which will not be repeated here.

[0263] S1004. The network device performs conjugation processing on at least one modulation symbol in the first modulation symbol sequence to obtain a second modulation symbol sequence.

[0264] The network device obtains a first modulation symbol sequence, performs conjugation processing on at least one modulation symbol in the first modulation symbol sequence, and obtains a second modulation symbol sequence. For details, please refer to the relevant content in the aforementioned S302, which will not be repeated here.

[0265] S1005. The network device sends at least one charging signal.

[0266] The network device obtains the second modulation symbol sequence, generates a charging signal after frequency conversion and other processing, and sends at least one charging signal. For details of S1004, reference may be made to the relevant content in S302, which will not be repeated here.

[0267] The various embodiments provided in the embodiments of the present application can be performed separately or in combination with each other. For example, the wireless charging method 300 and the wireless charging method 1000 can be combined with each other. The wireless charging method 300 and the wireless charging method 1100 can also be combined with each other.

[0268] In the embodiments provided in the present application above, the methods provided in the embodiments of the present application are introduced from the perspective of the interaction between the terminal device and the network device. Among them, the steps performed by the terminal device can be implemented by different functional entities that constitute the terminal device. The steps performed by the network device can be implemented by different functional entities that constitute the network device. For example, the network device can be a CU-DU architecture, the CU can generate a charging signal, and the DU can send a charging signal. In order to implement the various functions in the method provided in the embodiments of the present application above, the terminal device and the network device may include a hardware structure and / or a software module to implement the above functions in the form of a hardware structure, a software module, or a hardware structure plus a software module. Whether one of the above functions is executed in the form of a hardware structure, a software module, or a hardware structure plus a software module depends on the specific application and design constraints of the technical solution.

[0269] The following describes the communication device used to implement the above method in the embodiment of the present application in conjunction with the accompanying drawings. Therefore, the above contents can be used in subsequent embodiments, and repeated contents will not be repeated.

[0270] Fig.14 1 is a schematic block diagram of a communication device 1400 provided in an embodiment of the present application. The communication device 1400 may be a network device or a terminal device in the above-mentioned embodiment. For example, the communication device 1400 may be Figure 1 The communication device 1400 is a network device or a terminal device in the network device; or, the communication device 1400 is a chip (system) in the network device or a chip (system) in the terminal device; or, the communication device 1400 is a software module of the network device or the terminal device. The communication device 1400 can implement the functions or steps implemented by the terminal device or the network device in the above-mentioned various method embodiments. The communication device 1400 may include a processing module 1410 and a transceiver module 1420. Optionally, a storage module may be included, which may be used to store instructions (codes or programs) and / or data. The storage module may be, for example, a memory. The processing module 1410 and the transceiver module 1420 may be coupled to the storage module. For example, the processing module 1410 may read instructions (codes or programs) and / or data in the storage module to implement the corresponding method. When the communication device 1400 is a chip in the terminal device, the storage module may be a storage module in the chip, such as a register, a cache, etc. For example, the storage module may also be a storage module located outside the chip in the network device / terminal device, such as a read-only memory (ROM) or other types of static storage devices that can store static information and instructions, a random access memory (RAM), etc. The above-mentioned units may be independently arranged or partially or fully integrated.

[0271] In one possible implementation, the processing module 1410 may be a processor or a controller, such as a general-purpose central processing unit (CPU), a general-purpose processor, a digital signal processing (DSP), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic devices, transistor logic devices, hardware components or any combination thereof. It may implement or execute various exemplary logic blocks, modules and circuits described in conjunction with the disclosure of the present application. The processor may also be a combination that implements a computing function, such as a combination of one or more microprocessors, a combination of a DSP and a microprocessor, and the like. The transceiver module 1420 is a transceiver, an interface circuit, a bus, a pin or other possible communication interface for receiving signals from other devices. For example, when the device is implemented in the form of a chip, the transceiver module 1420 is an interface circuit for the chip to receive signals from other chips or devices, or an interface circuit for the chip to send signals to other chips or devices.

[0272] For example, the communication device 1400 can implement the behaviors and functions of the network device in the above method embodiments. The communication device 1400 can be a network device, or a component (such as a chip or circuit) used in a network device, or a chip or a chipset in a network device or a part of a chip used to perform related method functions, or a software module that can implement the method executed by the network device in the above method (such as any method in method 300, method 1000 and method 1100), without limitation.

[0273] In one implementation, the processing module 1410 is used to obtain a first signal, wherein the first signal includes a first modulation symbol sequence. The transceiver module 1420 is used to send at least one charging signal. The charging signal includes a second modulation symbol sequence, and the second modulation symbol sequence is obtained based on the result of conjugating at least one modulation symbol in the first modulation symbol sequence.

[0274] In another implementation, the charging method includes: the transceiver module 1420 is used to receive a first signal and send at least one charging signal. The first signal is a reflection signal of a second signal sent by the communication device 1400. The first signal includes a first modulation symbol sequence. The charging signal includes a second modulation symbol sequence, which is obtained by conjugating at least one modulation symbol in the first modulation symbol sequence.

[0275] As an optional implementation, the first modulation symbol in the second modulation symbol sequence is the conjugate of the second modulation symbol in the first modulation symbol sequence; or, the first modulation symbol in the second modulation symbol sequence is obtained by conjugating and amplitude scaling the second modulation symbol in the first modulation symbol sequence; or, the second modulation symbol sequence is obtained by conjugating and weighted averaging at least two modulation symbols in the first modulation symbol sequence.

[0276] As an optional implementation manner, the second modulation symbol sequence is obtained by conjugating at least two modulation symbols in the first modulation symbol sequence and then reversing them.

[0277] As an optional implementation manner, the first modulation symbol sequence is a modulation symbol sequence obtained by performing channel estimation on the first signal.

[0278] As an optional implementation, the transceiver module 1420 is further used to receive first indication information, where the first indication information is used to indicate that the first signal is used to request charging.

[0279] As an optional implementation manner, the first signal is carried on a first time-frequency resource, and the first time-frequency resource is used to transmit the charging request signal.

[0280] As an optional implementation, the transceiver module 1420 is further used to send configuration information, where the configuration information is used to indicate a second time-frequency resource, and the second time-frequency resource is used to transmit a charging request signal.

[0281] As an optional implementation manner, each modulation symbol in the first modulation symbol sequence is a superposition of modulation symbols of multiple terminal devices.

[0282] As an optional implementation, the transceiver module 1420 is further configured to send a second signal, wherein the first signal is a reflected signal of the second signal.

[0283] As an optional implementation manner, the subcarrier occupied by the first signal and the subcarrier occupied by the second signal are separated by k subcarriers, where k is an integer.

[0284] As an optional implementation manner, the transceiver module 1420 is further used to send second indication information, where the second indication information is used to indicate k.

[0285] As an optional implementation, the first signal comes from multiple terminal devices, which include a first terminal device and a second terminal device. The first signal includes a first component and a second component, the first component corresponds to the first terminal device, and the second component corresponds to the second terminal device; wherein, the subcarrier occupied by the first component and the subcarrier occupied by the second signal are spaced by k1 subcarriers, and the subcarrier occupied by the second component and the subcarrier occupied by the second signal are spaced by k2 subcarriers, k1 and k2 are different, and both k1 and k2 are integers.

[0286] As an optional implementation, the transceiver module 1420 is further used to send third indication information, where the third indication information is used to indicate k1; the transceiver module 1420 is further used to send fourth indication information, where the fourth indication information is used to indicate k2.

[0287] The transceiver module 1420 is further configured to space a time domain start position of the second modulation symbol sequence from a time domain end position in the first modulation symbol sequence by n symbols, where n is an integer greater than or equal to 0.

[0288] As an optional implementation manner, the transceiver module 1420 is further used to send fifth indication information, where the fifth indication information is used to indicate n.

[0289] As an optional implementation manner, the second modulation symbol sequence is continuous in the time domain; or, the second modulation symbol sequence is discrete in the time domain.

[0290] As an optional implementation manner, the subcarriers occupied by the second modulation symbol sequence and the subcarriers occupied by the first modulation symbol sequence are separated by m subcarriers, where m is an integer.

[0291] As an optional implementation manner, the transceiver module 1420 is further used to send sixth indication information, where the sixth indication information is used to indicate m.

[0292] As an optional implementation manner, the first modulation symbol sequence occupies multiple subcarriers, and the second modulation symbol sequence occupies at least one subcarrier among the multiple subcarriers.

[0293] As an optional implementation manner, the first modulation symbol in the first modulation symbol sequence is received from the pth antenna, and the second modulation symbol in the second modulation symbol sequence is sent from the pth antenna.

[0294] For another example, the communication device 1400 can implement the behaviors and functions of the network device in the above method embodiments. The communication device 1400 can be a terminal device, or a component (such as a chip or circuit) used in a terminal device, or a chip or a chipset in a terminal device or a part of a chip used to perform the functions of the related method, or a software module that can implement the method executed by the terminal device in the above method (such as any method in method 300, method 1000 and method 1100), without limitation.

[0295] In one implementation, the transceiver module 1420 is used to send a first signal and receive at least one charging signal. The first signal includes a first modulation symbol sequence. The charging signal includes a second modulation symbol sequence, and the second modulation symbol sequence is obtained based on the result of conjugating at least one modulation symbol in the first modulation symbol sequence.

[0296] In another implementation, the transceiver module 1420 is used to receive a second signal, reflect the second signal, and receive at least one charging signal. The charging signal includes a second modulation symbol sequence, and the second modulation symbol sequence is obtained based on the result of conjugating at least one modulation symbol in the first modulation symbol sequence. The first modulation symbol sequence is included in the first signal. The first signal is a reflection signal of the second signal.

[0297] As an optional implementation, the first modulation symbol in the second modulation symbol sequence is the conjugate of the second modulation symbol in the first modulation symbol sequence; or, the first modulation symbol in the second modulation symbol sequence is obtained by conjugating and amplitude scaling the second modulation symbol in the first modulation symbol sequence; or, the second modulation symbol sequence is obtained by conjugating and weighted averaging at least two modulation symbols in the first modulation symbol sequence.

[0298] As an optional implementation manner, the second modulation symbol sequence is obtained by conjugating at least two modulation symbols in the first modulation symbol sequence and then reversing them.

[0299] As an optional implementation manner, the first modulation symbol sequence is a modulation symbol sequence obtained by performing channel estimation on the first signal.

[0300] As an optional implementation, the transceiver module 1420 is further used to send first indication information, where the first indication information is used to indicate that the first signal is used to request charging.

[0301] As an optional implementation manner, the first signal is carried on a first time-frequency resource, and the first time-frequency resource is used to transmit the charging request signal.

[0302] As an optional implementation, the transceiver module 1420 is further used to receive configuration information, where the configuration information is used to indicate a second time-frequency resource, and the second time-frequency resource is used to transmit the charging request signal.

[0303] As an optional implementation manner, each modulation symbol in the first modulation symbol sequence is a superposition of modulation symbols of multiple terminal devices.

[0304] As an optional implementation manner, the first signal is a reflected signal of the second signal, and the second signal comes from a network device.

[0305] As an optional implementation manner, the subcarrier occupied by the first signal and the subcarrier occupied by the second signal are separated by k subcarriers, where k is an integer.

[0306] As an optional implementation manner, the transceiver module 1420 is further used to receive second indication information, where the second indication information is used to indicate k.

[0307] As an optional implementation, the first signal comes from multiple terminal devices, which include a first terminal device and a second terminal device. The first signal includes a first component and a second component, the first component corresponds to the first terminal device, and the second component corresponds to the second terminal device; wherein, the subcarrier occupied by the first component and the subcarrier occupied by the second signal are spaced by k1 subcarriers, and the subcarrier occupied by the second component and the subcarrier occupied by the second signal are spaced by k2 subcarriers, k1 and k2 are different, and both k1 and k2 are integers.

[0308] As an optional implementation, the transceiver module 1420 is further used to receive third indication information, where the third indication information is used to indicate k1; the transceiver module 1420 is further used to receive fourth indication information, where the fourth indication information is used to indicate k2.

[0309] As an optional implementation manner, the time domain start position of the second modulation symbol sequence is spaced n symbols from the time domain end position in the first modulation symbol sequence, where n is an integer greater than or equal to 0.

[0310] As an optional implementation manner, the transceiver module 1420 is further used to receive fifth indication information, where the fifth indication information is used to indicate n.

[0311] As an optional implementation manner, the second modulation symbol sequence is continuous in the time domain; or, the second modulation symbol sequence is discrete in the time domain.

[0312] As an optional implementation manner, the subcarriers occupied by the second modulation symbol sequence and the subcarriers occupied by the first modulation symbol sequence are separated by m subcarriers, where m is an integer.

[0313] As an optional implementation manner, the transceiver module 1420 is further used to receive sixth indication information, where the sixth indication information is used to indicate m.

[0314] As an optional implementation manner, the first modulation symbol sequence occupies multiple subcarriers, and the second modulation symbol sequence occupies at least one subcarrier among the multiple subcarriers.

[0315] As an optional implementation manner, the first modulation symbol in the first modulation symbol sequence is received from the pth antenna, and the second modulation symbol in the second modulation symbol sequence is sent from the pth antenna.

[0316] When the communication device 1400 is a chip-type device or circuit, the transceiver module may be an input / output circuit and / or a communication interface; the processing module may be an integrated processor or microprocessor or integrated circuit.

[0317] Fig.15 1 is a schematic block diagram of a communication device 1500 provided in an embodiment of the present application. The communication device 1500 may be a network device or a terminal device in the above-mentioned embodiment. For example, the communication device 1500 may be Figure 1 The network device or terminal device in the communication device 1500; or the communication device 1500 is a chip (system) in the network device or terminal device. In the embodiment of the present application, the chip system can be composed of a chip, or can include a chip and other discrete devices. For specific functions, please refer to the description in the above method embodiment.

[0318] The communication device 1500 includes one or more processors 1501, which are used to implement or support the communication device 1500 to implement the functions of the terminal device or network device in the method provided in the embodiment of the present application. Please refer to the detailed description in the method example for details, which will not be repeated here. The processor 1501 may also be referred to as a processing unit or a processing module, which can implement certain control functions. The processor 1501 may be a general-purpose processor or a dedicated processor, etc. For example, it includes: a baseband processor, a central processing unit, an application processor, a modem processor, a graphics processor, an image signal processor, a digital signal processor, a video codec processor, a controller, a memory, and / or a neural network processor, etc. The baseband processor may be used to process communication protocols and communication data. The central processing unit may be used to control the communication device 1500 (e.g., a network device or a terminal device), execute software programs and / or process data. Different processors may be independent devices, or they may be integrated in one or more processors, for example, integrated in one or more application-specific integrated circuits.

[0319] In one design, the processor 1501 may include a program 1503 (sometimes also referred to as code or instruction), and the program 1503 may be executed on the processor 1501 to enable the communication device 1500 to perform the method described in the following embodiments. In another possible design, the communication device 1500 includes a circuit ( Fig.15 The circuit is used to implement the network device or terminal device functions in the above-mentioned embodiments.

[0320] In one design, the communication device 1500 may include one or more memories 1502 on which a program 1504 (sometimes also referred to as code or instruction) is stored. The program 1504 may be executed on the processor 1501 so that the communication device 1500 performs the method described in the above method embodiment, for example Figure 3 , Fig.10 and Fig.11 The process shown in one or more of the figures.

[0321] In one design, the processor 1501 and / or the memory 1502 may include an artificial intelligence (AI) module 1507 and an AI module 15010, and the AI ​​module is used to implement AI-related functions. The AI ​​module may be implemented by software, hardware, or a combination of software and hardware. For example, the AI ​​module may include a RAN intelligent controller (RAN intelligent controller, RIC) module. For example, the AI ​​module may be a near real-time RIC or a non-real-time RIC.

[0322] In a possible design, data may also be stored in the processor 1501 and / or the memory 1502. The processor and the memory may be provided separately or integrated together.

[0323] In a possible design, the communication device 1500 may also include a transceiver 1505 and / or an antenna 1506. The processor 1501 may also be sometimes referred to as a processing unit, which controls the communication device 1500. The transceiver 1505 may also be sometimes referred to as a transceiver unit, a transceiver, a transceiver circuit, or a transceiver, etc., which is used to implement the transceiver function of the communication device through the antenna 1506.

[0324] In a possible design, the communication device 1500 may also include one or more of the following components: a wireless communication module, an audio module, an external memory interface, an internal memory, a universal serial bus (USB) interface, a power management module, an antenna, a speaker, a microphone, an input / output module, a sensor module, a motor, a camera, or a display screen, etc. It is understood that in some embodiments, the communication device 1500 may include more or fewer components, or some components may be integrated, or some components may be separated. These components may be implemented in hardware, software, or a combination of software and hardware.

[0325] The communication device in the above embodiment may be a terminal device (or network device), or a circuit, or a chip applied to a terminal device (or network device) or other combined devices, components, etc. having the above terminal device (or network device). When the communication device is a terminal device (or network device), the transceiver module may be a transceiver, which may include an antenna and a radio frequency circuit, etc., and the processing module may be a processor, such as a CPU. When the communication device is a component having the functions of the above terminal device (or network device), the transceiver module may be a radio frequency unit, and the processing module may be a processor. When the communication device is a chip system, the communication device may be an FPGA, a dedicated ASIC, a system on chip (SoC), a CPU, a network processor (NP), a DSP, a microcontroller unit (MCU), a programmable logic device (PLD) or other integrated chips. The processing module may be a processor of a chip system. The transceiver module or the communication interface may be an input / output interface or an interface circuit of a chip system. For example, the interface circuit may be a code / data read / write interface circuit. The interface circuit can be used to receive code instructions (the code instructions are stored in the memory, can be read directly from the memory, or can be read from the memory through other devices) and transmit them to the processor; the processor can be used to run the code instructions to execute the method in the above method embodiment. For another example, the interface circuit can also be a signal transmission interface circuit between the communication processor and the transceiver.

[0326] The embodiment of the present application also provides a communication system. Specifically, the communication system includes a network device and a terminal device. Exemplarily, the communication system includes a Figure 3 Alternatively, the communication system includes a terminal device and a network device for implementing Fig.10 Alternatively, the communication system includes a terminal device and a network device for implementing Fig.11 Terminal equipment and network equipment with related functions. Please refer to the relevant description in the above method embodiment for details, which will not be repeated here.

[0327] The present application also provides a computer-readable storage medium including instructions, which, when executed on a computer, causes the computer to execute Figure 3 , Fig.10 and Fig.11 A method executed by a terminal device or a network device.

[0328] The present application also provides a computer program product, including instructions, which, when executed on a computer, causes the computer to execute Figure 3 , Fig.10 and Fig.11 A method executed by a terminal device or a network device.

[0329] The embodiment of the present application provides a chip system, which includes a processor and may also include a memory, for implementing the functions of the terminal device or the network device in the above method. The chip system may be composed of a chip, or may include a chip and other discrete devices.

[0330] In order to achieve the above Figure 14-15 In order to realize the functions of the communication device, the embodiment of the present application further provides a chip, including a processor, for supporting the communication device to realize the functions involved in the terminal device or network device in the above method embodiment. In one possible design, the chip is connected to a memory or the chip includes a memory, and the memory is used to store the computer programs or instructions and data necessary for the communication device.

[0331] It should be understood that in the 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.

[0332] Those of ordinary skill in the art will appreciate that the various illustrative logical blocks and steps described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, computer software, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0333] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0334] In the several embodiments provided in the present 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 only schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation, 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.

[0335] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0336] If the functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the part of the technical solution of the present application that contributes essentially or the part of the technical solution can be embodied in the form of a software product, which is stored in a storage medium and includes several instructions for a computer device (which can be a personal computer, server, or network device, etc.) to perform all or part of the steps of the methods described in each embodiment of the present application. The aforementioned storage medium includes: various media that can store program codes, such as USB flash drives, mobile hard disks, read-only memories (ROM), RAM, magnetic disks or optical disks.

[0337] Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include these modifications and variations.

Claims

1. A wireless charging method, characterized in that: include: Acquire a first signal, where the first signal includes a first modulation symbol sequence; At least one charging signal is sent, where the charging signal includes a second modulation symbol sequence, where the second modulation symbol sequence is obtained based on a result of conjugating at least one modulation symbol in the first modulation symbol sequence.

2. A wireless charging method, characterized in that: include: Sending a first signal, wherein the first signal includes a first modulation symbol sequence; At least one charging signal is received, where the charging signal includes a second modulation symbol sequence, where the second modulation symbol sequence is obtained based on a result of conjugating at least one modulation symbol in the first modulation symbol sequence.

3. The method according to claim 1 or 2, characterized in that The second modulation symbol sequence is obtained according to a result of performing conjugate processing on at least one modulation symbol in the first modulation symbol sequence, including: The first modulation symbol in the second modulation symbol sequence is the conjugate of the second modulation symbol in the first modulation symbol sequence; or, The first modulation symbol in the second modulation symbol sequence is obtained by conjugating and amplitude scaling the second modulation symbol in the first modulation symbol sequence; or, The second modulation symbol sequence is obtained by conjugating and weighted averaging at least two modulation symbols in the first modulation symbol sequence.

4. The method according to claim 3, characterized in that The second modulation symbol sequence is obtained according to a result of performing conjugate processing on at least one modulation symbol in the first modulation symbol sequence, and further includes: The second modulation symbol sequence is obtained by conjugating at least two modulation symbols in the first modulation symbol sequence and then reversing the conjugated symbols.

5. The method according to any one of claims 1 to 4, characterized in that The first modulation symbol sequence is a modulation symbol sequence obtained by performing channel estimation on the first signal.

6. The method according to any one of claims 1 to 5, characterized in that The method is applied to a terminal device, and the method further includes: Sending first indication information, where the first indication information is used to indicate that the first signal is used to request charging.

7. The method according to any one of claims 1 to 5, characterized in that The method is applied to a network device, and the method further comprises: First indication information is received, where the first indication information is used to indicate that the first signal is used to request charging.

8. The method according to any one of claims 1 to 6, characterized in that The first signal is carried on a first time-frequency resource, and the first time-frequency resource is used to transmit a charging request signal.

9. The method according to any one of claims 1 to 6 and 8, characterized in that The method is applied to a network device, and the method further comprises: Send configuration information, where the configuration information is used to indicate a second time-frequency resource, and the second time-frequency resource is used to transmit a charging request signal.

10. The method according to any one of claims 1 to 5, 7 and 8, characterized in that The method is applied to a terminal device, and the method further includes: Configuration information is received, where the configuration information is used to indicate a second time-frequency resource, where the second time-frequency resource is used to transmit a charging request signal.

11. The method according to any one of claims 1 to 10, characterized in that: Each modulation symbol in the first modulation symbol sequence is a superposition of modulation symbols of multiple terminal devices.

12. The method according to any one of claims 1 to 6, 8 and 9 to 11, characterized in that The method is applied to a network device, and the method further comprises: A second signal is transmitted, wherein the first signal is a reflected signal of the second signal.

13. The method according to claim 12, characterized in that The subcarrier occupied by the first signal and the subcarrier occupied by the second signal are separated by k subcarriers, where k is an integer.

14. The method according to any one of claims 11 to 13, characterized in that The first signal comes from a plurality of terminal devices, the plurality of terminal devices include a first terminal device and a second terminal device, the first signal includes a first component and a second component, the first component corresponds to the first terminal device, and the second component corresponds to the second terminal device; The subcarriers occupied by the first component and the subcarriers occupied by the second signal are spaced by k1 subcarriers, and the subcarriers occupied by the second component and the subcarriers occupied by the second signal are spaced by k2 subcarriers, k1 and k2 are different, and both k1 and k2 are integers.

15. The method according to any one of claims 1 to 14, characterized in that The time domain starting position of the second modulation symbol sequence is separated from the time domain ending position of the first modulation symbol sequence by n symbols, where n is an integer greater than or equal to 0.

16. The method according to any one of claims 1 to 15, characterized in that The second modulation symbol sequence is continuous in the time domain; or, the second modulation symbol sequence is discrete in the time domain.

17. The method according to any one of claims 1 to 16, characterized in that The subcarriers occupied by the second modulation symbol sequence are spaced m subcarriers from the subcarriers occupied by the first modulation symbol sequence, where m is an integer.

18. The method according to any one of claims 1 to 17, characterized in that The first modulation symbol sequence occupies a plurality of subcarriers, and the second modulation symbol sequence occupies at least one subcarrier among the plurality of subcarriers.

19. The method according to any one of claims 1 to 18, characterized in that The first modulation symbol in the first modulation symbol sequence is received from the p-th antenna, and the second modulation symbol in the second modulation symbol sequence is sent from the p-th antenna, where p is an integer greater than or equal to 0.

20. A wireless charging method, characterized in that: include: receiving a first signal, where the first signal is a reflected signal of a second signal sent by a network device, and the first signal includes a first modulation symbol sequence; At least one charging signal is sent, where the charging signal includes a second modulation symbol sequence, where the second modulation symbol sequence is obtained based on a result of conjugating at least one modulation symbol in the first modulation symbol sequence.

21. A wireless charging method, characterized in that: include: receiving a second signal; reflecting the second signal; Receive at least one charging signal, the charging signal including a second modulation symbol sequence, the second modulation symbol sequence is obtained based on the result of conjugating at least one modulation symbol in a first modulation symbol sequence, the first modulation symbol sequence is included in a first signal, and the first signal is a reflected signal of the second signal.

22. The method according to claim 20 or 21, characterized in that The second modulation symbol sequence is obtained according to a result of performing conjugate processing on at least one modulation symbol in the first modulation symbol sequence, including: The first modulation symbol in the second modulation symbol sequence is the conjugate of the second modulation symbol in the first modulation symbol sequence; or, The first modulation symbol in the second modulation symbol sequence is obtained by conjugating and amplitude scaling the second modulation symbol in the first modulation symbol sequence; or, The second modulation symbol sequence is obtained by conjugating and weighted averaging at least two modulation symbols in the first modulation symbol sequence.

23. The method according to any one of claims 20 to 22, characterized in that: The time domain starting position of the second modulation symbol sequence is spaced n symbols from the time domain ending position of the first modulation symbol sequence, where n is an integer greater than or equal to 0.

24. The method according to any one of claims 20 to 23, characterized in that: The subcarriers occupied by the second modulation symbol sequence are spaced m subcarriers from the subcarriers occupied by the first modulation symbol sequence, where m is an integer.

25. The method according to any one of claims 20 to 24, characterized in that The second modulation symbol sequence is continuous in the time domain; or, the second modulation symbol sequence is discrete in the time domain.

26. The method according to any one of claims 20 to 25, characterized in that The first modulation symbol in the first modulation symbol sequence is received from the p-th antenna, and the second modulation symbol in the second modulation symbol sequence is sent from the p-th antenna, where p is an integer greater than or equal to 0.

27. A communication device, characterized in that: The method comprises a module for executing the method according to any one of claims 1 to 19, or comprises a module for executing the method according to any one of claims 20 to 26.

28. A communication device, characterized in that: Comprising a processor, wherein the processor is used to execute one or more computer programs or instructions so that the communication device performs the method as described in any one of claims 1, 3-5, 7-9, 11-19, or the communication device performs the method as described in any one of claims 2, 3-6, 8, 10-11 and 13-19; or the communication device performs the method as described in any one of claims 20 and 23-26, or the communication device performs the method as described in any one of claims 21 and 23-26.

29. A communication system, characterized in that: It includes a first communication device and a second communication device, the first communication device is used to execute the method as described in any one of claims 1, 3-5, 7-9, 11-19, and the second communication device is used to execute the method as described in any one of claims 2, 3-6, 8, 10-11 and 13-19; or, the first communication device is used to execute the method as described in any one of claims 20 and 23-26, and the second communication device is used to execute the method as described in any one of claims 21 and 23-26.

30. A computer-readable storage medium, characterized in that: A computer program or instruction is stored, and the computer program or instruction is used to implement the method as described in any one of claims 1, 3-5, 7-9, 11-19, or to implement the method as described in any one of claims 2, 3-5, 8, 10-11 and 13-19, or to implement the method as described in any one of claims 20 and 23-26, or to implement the method as described in claims 21 and 23-26.

31. A computer program product, characterized in that The computer program product includes a computer program, which, when executed on a computer, enables the computer to execute the method as described in any one of claims 1, 3-5, 7-9, 11-19, or enables the computer to execute the method as described in any one of claims 2, 3-5, 8, 10-11 and 13-19, or enables the computer to execute the method as described in any one of claims 20 and 23-26, or enables the computer to execute the method as described in any one of claims 21 and 23-26.

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