Communication method and device

Abstract

The invention provides a communication method and device, and is suitable for the fields of V2X, intelligent driving, Internet of Vehicles, Internet of Things and the like, and the method comprises the steps: receiving a first signal from a first device; the first signal is used for transmitting energy; converting the first signal into energy, wherein the energy is used for charging terminal equipment; sending first information to a network device or the first device; the first information indicates at least one of an energy storage status and a charging success. Through the above process, the first device charges the terminal device by sending the first signal for transmitting energy, so that the terminal device can obtain energy through the wireless signal, and the working endurance time of the terminal device is prolonged. The terminal equipment can also indicate the energy storage state through the first information, so that the network equipment or the first equipment can determine whether the terminal equipment needs to be continuously charged or not.

Description

Technical Field

[0001] This application relates to the field of communication technologies, and in particular, to a communication method and apparatus. Background Art

[0002] With the popularization of 5G new radio (NR) systems and Internet of Things (IoT) communications, more and more IoT devices have been deployed in people's lives. For example: smart water meters, shared bicycles, and devices targeted at sensing and data collection such as smart cities, environmental monitoring, smart homes, forest fire prevention, etc. Currently, IoT needs to use cellular protocols to communicate with base stations. Since base stations need to cover as large an area as possible, this makes IoT devices far from the base station consume up to 30 milliamperes (mA) of current during wireless communication. Therefore, current IoT devices need to use batteries with higher capacities to work.

[0003] However, due to the limited size of IoT devices, it is difficult to simply increase the battery capacity to extend the operating time of these devices. Since the electrical energy stored in the battery is limited, if a large number of IoT devices are regularly replaced with batteries, it will consume a lot of human and time costs. Therefore, research is currently underway to provide electrical energy for IoT devices through wireless power transfer.

[0004] However, how to achieve wireless power transfer for IoT devices is an urgent problem to be solved. Summary of the Invention

[0005] This application provides a communication method and apparatus for realizing wireless power transfer for devices.

[0006] In a first aspect, this application provides a communication method, which is applicable to scenarios such as environmental IoT. The execution subject of this method is a terminal device or a module or chip in the terminal device. Here, the terminal device is used as an example of the execution subject for description. In this method, a first signal from a first device is received; the first signal is used to transmit energy; the first signal is converted into energy, and the energy is used to charge the terminal device; a first message is sent to a network device or the first device; the first message indicates at least one of an energy storage state and charging success.

[0007] Through the above process, by sending a first signal for transmitting energy to charge the terminal device, the terminal device can obtain energy through wireless signals, improving the working battery life of the terminal device. The terminal device can also indicate the energy storage state through the first message, enabling the network device or the first device to determine whether the terminal device needs to continue charging.

[0008] In one implementation, at least one of the following parameters of the first signal is preset or preconfigured: the frequency band or frequency point where the first signal is located; the transmission period of the first signal; the transmission duration of the first signal; the waveform of the first signal; the transmission power of the first signal; the modulation mode of the first signal; the coding mode of the first signal; the time-frequency resource where the first signal is located.

[0009] Since the above parameters of the first signal are preset or preconfigured, there is no need to indicate these parameters through the signaling of the network device, which can enable the terminal device to obtain energy in a timely manner and improve the energy transmission efficiency.

[0010] In one implementation, before receiving the first signal from the first device, the method further includes: receiving a detection signal from the network device, where the detection signal instructs to report second information; sending the second information to the network device or the first device; where the second information includes at least one of the following: indicating whether wireless energy transmission is supported; the remaining energy value; the required energy value; the desired signal reception power; the RSSI or RSRP of the detection signal; the charging mode of the supported wireless energy transmission; the supported signal reception frequency band or frequency point.

[0011] In the above method, by reporting the second information, the network device can determine how to instruct the first device to send the first signal. For example, it can determine the transmission power of the first signal according to the desired signal reception power of the terminal device, and determine information such as the transmission duration of the first signal according to the remaining energy value or the required energy value, which is beneficial to transmit energy to the terminal device.

[0012] In one implementation, before receiving the first signal from the first device, the method further includes: determining that the remaining energy value is less than or equal to a threshold, and sending a first indication information to the network device or the first device; the first indication information requests a signal for energy transmission.

[0013] In the above method, the terminal device actively requests energy transmission, which can solve the problem that it is difficult for the terminal device to access the network when the battery is exhausted, and avoid the situation of the terminal device running out of energy.

[0014] In one implementation, sending the first indication information to the network device or the first device includes: sending a random access preamble to the network device or the first device, where the random access preamble corresponds to the first indication information.

[0015] In one implementation, the frequency resource carrying the first indication information is preset or preconfigured.

[0016] In one implementation, the method further includes: sending the second information to the network device or the first device; where the second information includes at least one of the following: indicating whether wireless energy transmission is supported; remaining energy value; required energy value; desired signal reception power; RSSI or RSRP of the detection signal; charging mode of supported wireless energy transmission; supported signal reception frequency band or frequency point.

[0017] In one implementation, the method further includes: receiving second indication information from the network device, the second indication information indicating at least one of the following: the frequency band or frequency point where the first signal is located; the transmission period of the first signal; the transmission duration of the first signal; the waveform of the first signal; the transmission power of the first signal; the modulation method of the first signal; the coding method of the first signal; the time-frequency resource where the first signal is located.

[0018] In one implementation, the second indication information is determined according to the second information.

[0019] In a second aspect, the present application provides a communication method, which is applicable to scenarios such as the Internet of Things in the environment. The execution subject of this method is a network device or a module or chip in the network device. Here, the network device is taken as an example of the execution subject for description. In this method, second indication information is determined; the second indication information is used to configure a first signal, and the first signal is used to transmit energy to a terminal device; the second indication information is sent to the terminal device and the first device, and the first device is used to send the first signal to the terminal device.

[0020] In one implementation, the second indication information indicates at least one of the following: the frequency band or frequency point where the first signal is located; the transmission period of the first signal; the transmission duration of the first signal; the waveform of the first signal; the transmission power of the first signal; the modulation method of the first signal; the coding method of the first signal; the time-frequency resource where the first signal is located.

[0021] In one implementation, the method further includes: receiving second information from the terminal device; where the second information includes at least one of the following: indicating whether wireless energy transmission is supported; remaining energy value; required energy value; desired signal reception power; RSSI or RSRP of the detection signal; charging mode of supported wireless energy transmission; supported signal reception frequency band or frequency point.

[0022] In one implementation, the second indication information is determined according to the second information.

[0023] In one implementation, before receiving the second information of the terminal device, the method further includes: sending a detection signal to the terminal device, where the detection signal instructs to report the second information.

[0024] In one implementation, before sending the second indication information, the method further includes: receiving first indication information; the first indication information requests a signal for transmitting energy.

[0025] In one implementation, the method further includes: receiving first information; the first information indicates at least one of the energy storage state and charging success of the terminal device.

[0026] In one implementation, the terminal device is a semi-active device or an active device.

[0027] In a third aspect, the present application provides a communication method, which is applicable to scenarios such as the Internet of Things in the environment. The execution subject of the method is a first device or a module or chip in the first device. Here, the first device is taken as the execution subject for description. The first device may be a device that provides a signal for transmitting energy to (the terminal device). The name of the first device is not limited and may be called a charging node or a charging device or an energy supply device or an energy relay device, etc. In this method, a first signal is determined, and the first signal is used to transmit energy to the terminal device; the first signal is sent to the terminal device; first information from the terminal device is received; the first information indicates at least one of the energy storage state and charging success of the terminal device.

[0028] In one implementation, at least one of the following parameters of the first signal is preset or pre-configured:

[0029] The frequency band or frequency point where the first signal is located; the transmission period of the first signal; the transmission duration of the first signal; the waveform of the first signal; the transmission power of the first signal; the modulation method of the first signal; the coding method of the first signal; the time-frequency resource where the first signal is located.

[0030] In one implementation, the method further includes: receiving second indication information from the network device, where the second indication information indicates at least one of the following: the frequency band or frequency point where the first signal is located; the transmission period of the first signal; the transmission duration of the first signal; the waveform of the first signal; the transmission power of the first signal; the modulation method of the first signal; the coding method of the first signal; the time-frequency resource where the first signal is located.

[0031] In a possible implementation, the terminal device is an Internet of Things terminal device in the environment, or the terminal device is a semi-active device or an active device.

[0032] Fourthly, the present application further provides a communication device, which can implement any of the methods provided in any one of the first to third aspects above. The communication device can be implemented by hardware or by hardware executing corresponding software. The hardware or software includes one or more units or modules corresponding to the above functions.

[0033] In a possible implementation manner, the communication device includes: a processor configured to support the communication device to execute the corresponding functions of the network device, the terminal device, or the first device in the above methods. The communication device may further include a memory, which can be coupled to the processor and stores the necessary program instructions and data of the communication device. Optionally, the communication device further includes an interface circuit for supporting the communication between the communication device and other devices such as terminal devices.

[0034] In a possible implementation manner, the communication device includes corresponding functional modules, which are respectively used to implement the steps in the above methods. The functions can be implemented by hardware or by hardware executing corresponding software. The hardware or software includes one or more modules corresponding to the above functions.

[0035] In a possible implementation manner, the structure of the communication device includes a processing unit and a communication unit, and these units can execute the corresponding functions in the above method examples. For details, refer to the descriptions in the methods provided in any one of the first to third aspects, and details are not described here.

[0036] Fifthly, a communication device is provided, including units or modules for executing the methods in any possible implementation manner in any one of the first to third aspects above.

[0037] Sixthly, a communication device is provided, including a processor and an interface circuit. The interface circuit is used to receive signals from other communication devices outside the communication device and transmit them to the processor or send signals from the processor to other communication devices outside the communication device. The processor realizes the functional modules of the methods in any possible implementation manner in any one of the first to third aspects above through logic circuits or by executing computer programs or instructions. Optionally, the communication device further includes a memory for storing computer programs or instructions.

[0038] Seventhly, a computer-readable storage medium is provided, in which computer programs or instructions are stored. When the computer programs or instructions are executed by a processor, the methods in any possible implementation manner in any one of the first to third aspects above are realized.

[0039] In an eighth aspect, there is provided a computer program product storing instructions. When a computer reads and executes the computer program product, the methods in any possible implementation manner of any one of the foregoing first to third aspects are implemented.

[0040] In a ninth aspect, there is provided a circuit for executing the methods in any possible implementation manner of any one of the foregoing first to third aspects. The circuit may include a chip circuit. Optionally, the circuit may also be coupled to a memory.

[0041] In a tenth aspect, there is provided a chip including a processor. When the processor executes a computer program or instructions, it is used to implement the methods in any possible implementation manner of any one of the foregoing first to third aspects. Optionally, the chip may further include a memory. The chip may be composed of chips, or may include chips and other discrete devices.

[0042] In an eleventh aspect, there is provided a communication device including a processor. The processor implements the methods in any possible implementation manner of any one of the foregoing first to third aspects through a logic circuit or by executing a computer program or instructions.

[0043] In a twelfth aspect, an embodiment of the present application further provides a communication system. The communication system includes: a terminal device for implementing the methods in the foregoing first aspect and any possible implementation manner of the first aspect; a network device for implementing the methods in the foregoing second aspect and any possible implementation manner of the second aspect; a first device for implementing the methods in the foregoing third aspect and any possible implementation manner of the third aspect. Description of the Drawings

[0044] Figure 1 It is a schematic diagram of an access network device architecture provided by an embodiment of the present application;

[0045] Figure 2 It is a schematic diagram of a network architecture applicable to an embodiment of the present application;

[0046] Figure 3 It is a schematic diagram of a network architecture provided by an embodiment of the present application;

[0047] Figure 4 It is a schematic diagram of a network architecture provided by an embodiment of the present application;

[0048] Figure 5 It is a schematic diagram of the deployment of a charging node provided by an embodiment of the present application;

[0049] Figure 6 It is a schematic diagram of a receiver architecture provided by an embodiment of the present application;

[0050] Figure 7 Schematic diagram of a receiver architecture supporting a time switching architecture provided by an embodiment of the present application;

[0051] Figure 8 Schematic diagram of a receiver architecture supporting a frequency division architecture provided by an embodiment of the present application;

[0052] Figure 9 Schematic diagram of a receiver architecture supporting a power division architecture provided by an embodiment of the present application;

[0053] Figure 10 Schematic diagram of a communication method flow provided by an embodiment of the present application;

[0054] Figure 11 Schematic diagram of a communication method flow provided by an embodiment of the present application;

[0055] Figure 12 Schematic diagram of a communication method flow provided by an embodiment of the present application;

[0056] Figure 13 Schematic diagram of a communication device structure provided by an embodiment of the present application;

[0057] Figure 14 Schematic diagram of a communication device structure provided by an embodiment of the present application;

[0058] Figure 15 Schematic diagram of a communication device structure provided by an embodiment of the present application. Detailed implementation manners

[0059] Next, the technical solutions in the embodiments of the present application will be described with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments of the present application are only a part of the embodiments of the present application, rather than all the embodiments. The terms "first", "second" and the corresponding term numbers in the present application are used to distinguish similar objects, and do not have to be used to describe a specific order or sequence. It should be understood that such terms can be interchanged under appropriate circumstances, which is only a way of distinguishing objects with the same attributes when describing the embodiments of the present application.

[0060] The method provided by the embodiments of this application can be applied to various mobile communication systems. For example, it can be the Internet of Things (IoT), Narrow Band Internet of Things (NB-IoT), the 4th generation (4G) communication system (such as Long Term Evolution (LTE)), the 5th generation (5G) communication system (such as 5G New Radio (NR)), it can also be a hybrid architecture of LTE and NR, or it can be 6G or a new communication system emerging in the future development of communications, etc. The communication system can also include a Machine-to-Machine (M2M) network, Machine Type Communication (MTC), or other networks. Exemplarily, the method provided by the embodiments of this application can be applied to a communication system that supports IoT or Ambient Internet of Things (AIoT) technology.

[0061] The method and device provided by the embodiments of this application are based on the same or similar technical concepts. Since the principles for the method and device to solve problems are similar, the implementation of the device and the method can be referred to each other, and the repeated parts will not be elaborated.

[0062] Hereinafter, some terms in the embodiments of this application will be explained first to facilitate the understanding of those skilled in the art.

[0063] In the embodiments of the present application, the network device is a device in a wireless network, and the network device may also be referred to as a network apparatus or a radio access network device or an access network device. For example, the network device may be a radio access network (RAN) node that connects a terminal device to a wireless network, and may also be referred to as an access network device. The network device includes but is not limited to: a base station, an evolved NodeB (eNodeB), a transmission reception point (TRP), a next generation NodeB (gNB) in a 5th generation (5G) mobile communication system, an access network device in an open radio access network (O-RAN), a next generation NodeB in a 6th generation (6G) mobile communication system, a base station in a future mobile communication system, or an access node in a wireless fidelity (WiFi) system, etc.; or it may be a module or unit that completes some functions of the base station. For example, it may be a central unit (CU), a distributed unit (DU), a central unit control plane (CU-CP) module, or a central unit user plane (CU-UP) module. The access network device may be a macro base station, a micro base station, an indoor station, or a relay node or a donor node, etc. In the present application, no specific technology and specific device form adopted by the network device are limited.

[0064] Such as Figure 1As shown, in some implementations, a network device may include a centralized unit (CU) and a distributed unit (DU). The RAN device including the CU node and the DU node splits the protocol layers of the gNB in the NR system. The functions of some protocol layers are centrally controlled by the CU, and the functions of the remaining or all protocol layers are distributed in the DU, with the CU centrally controlling the DU. Further, the CU can be further divided into a control plane (CU-CP) and a user plane (CU-UP). Among them, CU-CP is responsible for the control plane functions, mainly including radio resource control (RRC) and the packet data convergence protocol (PDCP) corresponding to the control plane (i.e., PDCP-C). PDCP-C is mainly responsible for encryption, decryption, integrity protection, data transmission, etc. of the control plane data. CU-UP is responsible for the user plane functions, mainly including the service data adaptation protocol (SDAP) and the PDCP corresponding to the user plane (i.e., PDCP-U). Among them, SDAP is mainly responsible for processing the data of the core network and mapping the flow to the bearer. PDCP-U is mainly responsible for encryption, decryption, integrity protection, header compression, sequence number maintenance, data transmission, etc. of the data plane. Among them, CU-CP and CU-UP are connected through the E1 interface. CU-CP represents the gNB connected to the core network through the NG interface and connected to the DU through the control plane of the F1 interface (i.e., F1-C). CU-UP is connected to the DU through the user plane of the F1 interface (i.e., F1-U). Of course, there is also a possible implementation where PDCP-C is also in CU-UP.

[0065] It can be understood that in different systems, the CU (including CU-CP or CU-UP), or the DU may also have different names, but those skilled in the art can understand their meanings. For example, in an open radio access network (O-RAN) system, the CU may also be referred to as O-CU (open CU), the DU may also be referred to as O-DU, the CU-CP may also be referred to as O-CU-CP, and the CU-UP may also be referred to as O-CU-UP. For the convenience of description, in this application, the CU, CU-CP, CU-UP, and DU are used as examples for description. The network device may also include an active antenna unit (AAU). The CU implements some functions of the gNB, and the DU implements some functions of the gNB. For example, the CU is responsible for processing non-real-time protocols and services and implementing the functions of the RRC layer. The DU is responsible for processing physical layer protocols and real-time services and implementing the functions of the radio link control (RLC) layer, media access control (MAC) layer, and physical (PHY) layer. In some deployments, the CU may also be divided into a centralized unit control plane (CU-CP) node and a centralized unit user plane (CU-UP) node. Among them, the CU-CP is responsible for the control plane function, and the CU-UP is responsible for the user plane function.

[0066] The terminal device involved in the embodiments of this application can be a wireless terminal device capable of receiving scheduling and indication information from a network device. The terminal device can be referred to as a terminal device, and can also be referred to as a user equipment (UE), mobile station (MS), mobile terminal (MT), etc. The terminal device can be a device with wireless communication capabilities (providing voice / data connectivity to users). For example, a handheld device with wireless connection capabilities, or an in-vehicle device, in-vehicle module, etc. Currently, some examples of terminal devices are: mobile phone, tablet computer, laptop computer, palmtop computer, mobile internet device (MID), wearable device, virtual reality (VR) device, augmented reality (AR) device, wireless terminal in industrial control, wireless terminal in vehicle networking, wireless terminal in self-driving, wireless terminal in remote medical surgery, wireless terminal in smart grid, wireless terminal in transportation safety, wireless terminal in smart city, or wireless terminal in smart home, device-to-device (D2D) terminal device, vehicle-to-everything (V2X) communication terminal device, intelligent vehicle, in-vehicle system (or in-vehicle sending unit) (telematics box, T-box), machine-to-machine / machine-type communications (M2M / MTC) terminal device, internet of things (IoT) terminal device, etc. For example, the terminal device can be an in-vehicle device, vehicle equipment, in-vehicle module, vehicle, on-board unit (OBU), roadside unit (RSU), T-box, chip, or system on chip (SOC), etc. The above chip or SOC can be installed in a vehicle, OBU, RSU, or T-box. The wireless terminal in industrial control can be a camera, robot, etc. The wireless terminal in smart home can be a TV, air conditioner, floor sweeper, speaker, set-top box, etc.The terminal device can also be a V2X device. For example, a smart car (smart car or intelligent car), a digital car, an unmanned car (unmanned car or driverless car or pilotless car or automobile), a self-driving car (self-driving car or autonomous car), a pure electric vehicle (pure EV or Battery EV), a hybrid electric vehicle (hybrid electric vehicle, HEV), a range extended electric vehicle (range extended EV, REEV), a plug-in hybrid electric vehicle (plug-in HEV, PHEV), a new energy vehicle, or a road site unit (RSU). The terminal device can also be a device in device-to-device (D2D) communication, such as a meter, a water meter, etc.

[0067] In an embodiment of the present application, the terminal device can also be a tag in an AIoT or IoT system, or the terminal device is a semi-active device or an active device.

[0068] A tag can also be referred to as an electronic tag or a radio frequency identification (RFID) tag or a tag device. Or, when the present application is applied to a communication system supporting AIoT, the tag can also be referred to as an AIoT terminal device or an AIoT device or an AIoT device. Or, when the present application is applied to a communication system supporting IoT, the tag can also be referred to as an IoT terminal device or an IoT device or an IoT device. In the present application, the tag can communicate with a network device as a type of terminal device.

[0069] In one classification method, the types of tags can be divided into passive tags, semi-passive tags, and active tags. Among them, passive tags and semi-passive tags can use a communication method based on backscatter, and active tags use a communication method of actively generating a carrier.

[0070] In another classification method, tags can be divided into the following three types of devices:

[0071] Device A (device A), or also known as a passive device: It has no energy storage, cannot generate signals independently, and uses backscatter to transmit signals;

[0072] Device B, or a semi-active device: includes an energy storage device such as a battery, has energy storage, but cannot generate signals independently, uses backscattering to transmit signals, and the stored energy can amplify the reflected signals;

[0073] Device C, or an active device: includes an energy storage device such as a battery, has energy storage, can generate signals independently, and has active radio frequency components for transmission.

[0074] The tag in this application can be any one of the above three types of devices.

[0075] Figure 2 A schematic diagram of a communication system applicable to the embodiments of this application is shown.

[0076] As Figure 2 shown, the communication system may include at least one network device, such as network devices 110 and 111 shown in the figure; the communication system may also include at least one terminal device, such as terminal devices 120 to 127 shown in the figure. Among them, the terminal devices 120 to 127 may be mobile or fixed. One or more of network device 110 and terminal devices 120 to 125 can communicate through a wireless link, and network device 110 communicates with one or more of terminal devices 126 to 127 through network device 111 via a wireless link. Each network device can provide communication coverage for a specific geographical area and can communicate with terminal devices located within that coverage area. For example, the network device can send configuration information to the terminal device, and the terminal device can send uplink data to the network device based on this configuration information; or for another example, the network device can send downlink data to the terminal device. Therefore, network devices 110, 111, and terminal devices 120 to 127 in the figure constitute a communication system. In addition, terminal devices 123 to 125 also constitute a communication system, in which terminal device 123 can communicate with one or more of terminal devices 124 to 125 via a wireless link. In addition, network device 111 and terminal devices 126 to 127 also constitute a communication system, in which network device 111 can communicate with one or more of terminal devices 126 to 127 via a wireless link.

[0077] It should be understood that Figure 2 Exemplarily, a network device and multiple terminal devices, as well as the communication links between the communication devices, are shown. Optionally, the communication system may include multiple network devices, and the coverage range of each network device may include other numbers of terminal devices, such as more or fewer terminal devices. This application does not limit this.

[0078] In this application, if the terminal device is a tag in AIoT or IoT, it can communicate directly with the network device. For example, as Figure 3 shown, during the communication process between the network device and the tag, the wireless signal transmission can be completed by leveraging the energy stored in its own energy storage module, or it can rely on obtaining energy from the radio frequency signal from the outside (such as the network device) and communicate through backscattered radio frequency signals. The tag can be an independent device, or it can be integrated with the terminal device, that is, the tag is a part of the terminal device. In this communication system, the network device can have the function of a reader in a radiofrequency identification (RFID) system, that is, the network device can act as a reader to communicate with the tag.

[0079] In another implementation, as Figure 4 shown, the tag cannot actively send radio frequency signals. The terminal device first transmits an excitation or carrier signal (which can carry downlink data), and the tag modulates the carrier signal and sends the modulated signal to the terminal device or the network device (which can carry uplink data).

[0080] Considering semi-passive devices, such as AIoT devices, which have poor battery life and need to be charged by a stable radio frequency (RF) signal to provide sufficient energy for the AIoT device. Since the coverage distance of RF charging is much smaller than the coverage distance of the communication signal, it is difficult to meet the basic charging needs of most AIoT devices by directly providing wireless charging services for AIoT devices in the cell through the base station.

[0081] To improve energy coverage, this application proposes a new lightweight energy header (EH). The main function of this energy header is RF charging, with communication as a secondary function; or this energy header only supports RF charging. For example, as Figure 5 shown, the left side shows the RF charging range and signal coverage range of the base station. The RF charging range is significantly smaller than the signal coverage range. If a device is outside the RF charging range but within the signal coverage range, although the device can communicate with the base station, the base station cannot perform RF charging for it. Therefore, as shown on the right side of the figure, by deploying multiple energy headers within the cell range, each energy header has an RF charging range and can perform RF charging for the devices within its RF charging range, enabling energy coverage throughout the cell range and meeting the charging needs of all devices in the cell (such as AIoT devices).

[0082] Among them, the charging node can be a device that already existed before this application. For example, it can be a terminal device. The charging node can also be a newly designed device, and this application does not limit this. The transmission power of the charging node can be less than that of the base station.

[0083] First, the relevant technical features involved in the embodiments of this application will be explained. It should be noted that these explanations are for making the embodiments of this application easier to understand and should not be regarded as limiting the scope of protection required by this application.

[0084] Wireless power transfer:

[0085] Wireless power transfer can also be referred to as wireless energy transfer or wireless charging or RF charging or simultaneous wireless information and power transfer (SWIPT). The energy can refer to electrical energy or other forms of energy, and no specific limitation is made here. In the embodiments of this application, wireless power transfer is taken as an example of wireless energy transfer for description. Wireless energy transfer is a non-contact electrical energy transfer method between different devices. For example, device 1 sends a radio frequency signal to device 2. After device 2 receives the radio frequency signal from device 1, it then converts the radio frequency signal into electrical energy. Wireless energy transfer can serve multiple devices. For example, Internet of Things devices with a power consumption of about 10 micro-watts (uW) can be provided with electrical energy through the method of wireless energy transfer.

[0086] For example, if a device, such as an IoT device, supports wireless charging, the receiver it includes can be as Figure 6 shown. As Figure 6 shown, the receiver includes an antenna, a band pass filter (BPF), an envelope detector, and a low pass filter (BPF). After the radio frequency signal passes through the antenna, the band pass filter, the envelope detector, and the low pass filter, the RF energy can be converted into direct current and stored in the energy storage module (such as a battery).

[0087] For a receiver that supports wireless energy transfer, its energy conversion efficiency = the energy of the received RF signal / the energy of the RF signal converted into a DC signal × 100%. Since there is energy loss in the process of converting the RF signal into a DC signal, there is a sensitivity threshold for a receiver that supports wireless energy transfer. For example, the sensitivity threshold is -30 dbm. Then, if the received power of the RF signal received by the receiver < -30 dbm, at this time the energy conversion efficiency is 0, that is, the receiver cannot obtain energy through this RF signal.

[0088] In wireless energy transfer, the radio frequency (RF) signal used to provide energy may or may not carry information. If the RF signal carries information, then wireless energy transfer can also be referred to as SWIPT.

[0089] The SWIPT transmission method decodes information and harvests energy from the signal received by the receiving antenna simultaneously. Since energy harvesting will corrupt the information content of the signal, it is impossible to perform information decoding and energy harvesting on the same signal simultaneously. Therefore, the signal needs to be separated and used for information decoding and energy harvesting respectively to achieve SWIPT transmission. Typical SWIPT architectures mainly include the following:

[0090] 1) Time switching (TS) architecture: Allocate different time slots or time units for energy harvesting and information decoding. For example, as Figure 7 shown, after the RF signal received by the receiving antenna passes through a bandpass filter (BPF), the TS module is used to switch the RF signal to channels 1 and 2 in a time-division manner. Channel 1 may include an energy storage module. Channel 1 is an energy harvesting channel based on diode rectification, which converts the RF signal into energy and stores the energy. Channel 2 is used for information decoding to obtain the information carried in the RF signal. The specific structures of channels 1 and 2, including which modules, are not limited in this application.

[0091] 2) Frequency splitting (FS) architecture: Allocate different frequency bands for energy harvesting and information decoding. Specifically, different channels are configured with filters of different frequency bands. For example, as Figure 8 shown, after the RF signal received by the receiving antenna passes through the BPFs of different channels, signal splitting is achieved. Channel 1 realizes signal energy conversion and storage, while Channel 2 is used for information decoding to obtain the information carried in the RF signal. Channel 1 may include an energy storage module. The specific structures of channels 1 and 2, including which modules, are not limited in this application.

[0092] 3) Power splitting (PS) architecture: Split the received signal into two streams according to the power splitting factor for energy harvesting and information decoding respectively. For example, as Figure 9 shown, after the RF signal received by the receiving antenna passes through the BPF, the PS module is used to split the RF signal into channels 1 and 2. Channel 1 realizes the conversion and storage of the RF signal into energy, while Channel 2 is used for information decoding to obtain the information carried in the RF signal. Channel 1 may include an energy storage module. The specific structures of channels 1 and 2, including which modules, are not limited in this application.

[0093] In this application, predefined content generally refers to information that is defined by standards and does not require configuration by other devices. It is information that is pre-recorded / written in the hardware and / or software of the terminal device itself, or can be understood as information that cannot be changed by the network device or other terminal devices. Preconfigured content generally refers to information that is pre-recorded / written in the hardware and / or software of the terminal device itself, which is determined by the device manufacturer at the time of factory production and can be changed through software or hardware.

[0094] (Pre)configuration can be divided into network device (pre)configuration and terminal device (pre)configuration. If it is network device (pre)configuration, it can be (pre)configured through a system information block (SIB) or RRC signaling; if it is terminal device (pre)configuration, it can be (pre)configured according to PC5-RRC signaling.

[0095] The network architecture and service scenarios described in the embodiments of this application are for the purpose of more clearly explaining the technical solutions of the embodiments of this application, and do not constitute a limitation on the technical solutions provided by the embodiments of this application. Those of ordinary skill in the art know that with the evolution of the network architecture and the emergence of new service scenarios, the technical solutions provided by the embodiments of this application are equally applicable to similar technical problems.

[0096] Based on the description of the above related technical features, the embodiments of this application provide a solution for wireless charging of devices such as AIoT devices based on a charging node. The methods provided by the embodiments of this application will be introduced in detail below.

[0097] It can be understood that this application does not particularly limit the specific structure of the execution subject of the methods provided by the embodiments of this application. The methods executed by the terminal device in this application can be applied to the terminal device or modules in the terminal device. The methods executed by the network-side device can be applied to the network device or modules in the network device. The methods executed by the first device can be applied to the first device or modules in the first device. As long as it can communicate according to the methods provided by the embodiments of this application by running a program that records the code of the methods provided by the embodiments of this application, the interaction between the terminal device, the first device, and the network device will be used as an example for description below, and other situations will not be elaborated.

[0098] Among them, the first device can refer to a device that provides a signal for transmitting energy (for the terminal device), or a device that provides an energy signal (for the terminal device), or a device that performs wireless energy transmission (to the terminal device), or a device that performs wireless charging (for the terminal device), or a device that provides energy (for the terminal device). The name of the first device is not limited and can be called a charging node, a charging device, an energy supply device, an energy relay device, etc.

[0099] Example 1:

[0100] In Example 1, the network device may instruct a first device (such as a mobile phone or other device) to wirelessly charge a terminal device (such as a tag or other device).

[0101] As Figure 10 shown, it is a schematic flowchart of a communication method provided by an embodiment of the present application. In this method flowchart, the terminal device may also be replaced by a tag, device A, device B, device C, or an AIoT device, and the first device may also be replaced by a terminal device or a charging node. The names of the various signals, messages, or information in this method flowchart are only examples, and there may be other names for the various signals, messages, or information in this method flowchart, which will not be elaborated here. The method includes:

[0102] Step 1001: The network device sends a probing signal, and the probing signal instructs to report second information.

[0103] Correspondingly, the terminal device receives the probing signal.

[0104] The name of the probing signal is only an example, and there may be other names for the probing signal, which will not be elaborated here.

[0105] Step 1002: The terminal device sends the second information.

[0106] Among them, the terminal device may directly send the second information to the network device, or send the second information to the first device, and the first device forwards the second information to the network device. The specific name of the second information is not limited. For example, it may also be called an energy state indicator or other names.

[0107] In the present application, the second information includes at least one of the following:

[0108] 1. Capability information, indicating whether the terminal device supports wireless energy transmission; if the terminal device does not support wireless energy transmission, then it does not instruct the first device to send a signal for transmitting energy to the terminal device; if the terminal device supports wireless energy transmission, then it instructs the first device to send a signal for transmitting energy to the terminal device;

[0109] 2. The remaining energy value represents the energy remaining in the terminal device currently. The remaining energy value can be the specific value of the energy remaining in the terminal device currently, or the ratio of the remaining energy in the energy storage module (such as a battery) of the terminal device to the capacity of the energy storage module. Or, the remaining energy value can be the duration that the energy remaining in the terminal device currently can support the terminal device to work. The network device or the first device can determine whether to preferentially perform wireless energy transfer for the terminal device according to the remaining energy value, or determine information such as the duration of sending a signal for wireless energy transfer to the terminal device. For example, if the remaining energy value is 5%, it means that the terminal device only has 5% of the energy, and the network device can preferentially schedule a signal for wireless energy transfer for the terminal device. The capacity of the energy storage module can refer to the maximum energy value that the energy storage module can store.

[0110] 3. The required energy value represents how much energy the terminal device needs to obtain. The network device or the first device can determine information such as the duration of sending a signal for wireless energy transfer to the terminal device according to the required energy value.

[0111] 4. The energy harvesting sensitivity threshold represents the minimum signal reception power required when the energy conversion efficiency of the terminal device is greater than or equal to 0. For example, if the energy harvesting sensitivity threshold is -30 dbm, it means that the energy conversion efficiency of the terminal device is 0. If the reception power of the signal received by the terminal device < -30 dbm, at this time the energy conversion efficiency is 0, and the terminal device cannot obtain energy through this signal. If the reception power of the signal received by the terminal device > -30 dbm, at this time the energy conversion efficiency is greater than 0, and the terminal device can obtain energy through this signal. Correspondingly, the network device or the first device can determine the transmission power of the signal sent to the terminal device for wireless energy transfer according to the energy harvesting sensitivity threshold.

[0112] 5. The expected signal reception power. The expected signal reception power can be a value or a range of reception powers. For example, the expected signal reception power represents the minimum value of the signal reception power expected by the terminal device. For example, the expected signal reception power is [5 dbm, 10 dbm]. Correspondingly, the network device or the first device can determine the transmission power of the signal sent to the terminal device for wireless energy transfer according to the expected signal reception power. Among them, the expected signal reception power can be greater than or equal to the energy harvesting sensitivity threshold.

[0113] 6. The received signal strength indicator (RSSI) or reference signal receiving power (RSRP) of the detection signal; the network device or the first device may determine at least one of the transmission power and duration of the signal for wireless energy transmission sent to the terminal device according to the RSSI or RSRP.

[0114] 7. The charging mode of the supported wireless energy transmission; the charging mode includes at least one of a normal mode, a time switching architecture mode, a frequency division architecture mode, and a power splitting architecture mode. The normal mode means that when the terminal device converts the signal into energy, it cannot perform information decoding at the same time, so the network device or the first device will not carry information in the signal for wireless energy transmission; the time switching architecture mode means that the terminal device supports energy harvesting using a time switching architecture; the frequency division architecture mode means that the terminal device supports energy harvesting using a frequency division architecture; the power splitting architecture mode means that the terminal device supports energy harvesting using a power splitting architecture.

[0115] 8. The supported signal receiving frequency band or frequency point. The network device or the first device may determine in which frequency bands or frequency points to send the signal for wireless energy transmission according to this information.

[0116] 9. The number of supported channels; the number of channels includes the number of energy harvesting channels and the number of data transmission channels. For example, assume that the terminal device only supports envelope detection. If the number of data transmission channels is 1, only on-off keying (OOK) signal transmission is supported. If the number of data transmission channels is 2, OOK signal transmission may be supported, or frequency-shift keying (FSK) signal transmission may also be supported. If the number of supported channels is greater than 1, then there are multiple energy harvesting channels in the terminal device, and each energy harvesting channel may support different frequency points; if the number of supported channels is equal to 1, it is very likely that energy harvesting and data transmission share the same channel, indicating that the terminal device does not support the time switching architecture mode, the frequency division architecture mode, and the power splitting architecture mode.

[0117] 10. The type of matching circuit, for example, the type of matching circuit includes but is not limited to L-type matching network, π-type matching network, and T-type matching network, etc. The type of matching circuit is related to the energy harvesting efficiency of the terminal device. The network device or the first device may determine at least one of the transmission power, frequency band, frequency point, and duration of the signal for wireless energy transmission according to the type of matching circuit.

[0118] If one piece of information is not included in the second information, this information can be default. For example, if the second information does not include the capability information, it can be defaulted that the terminal device supports wireless energy transfer. For example, if the second information does not include the energy harvesting sensitivity threshold, the energy harvesting sensitivity threshold can be a default value, for example, the default value is -30 dbm. Other information will not be exemplified one by one.

[0119] If the terminal device does not send the second information, each item described above is preset or preconfigured.

[0120] The above are just examples, and the second information can also include other contents, which are not limited in this application.

[0121] Step 1003: The network device sends the second indication information to the terminal device and the first device.

[0122] Correspondingly, the terminal device receives the second indication information, and the first device receives the second indication information.

[0123] Among them, the second indication information is used to configure the first signal, and the first signal is used to transfer energy to the terminal device. The specific name of the second indication information is not limited. For example, it can also be called energy resource indication, etc.

[0124] This application does not limit how the network device sends the second indication information. For example, the network device sends a first message to the terminal device, and the first message instructs the terminal device to receive the first signal, and the first message includes the second indication information. After receiving the first message, the terminal device can receive the first signal according to the second indication information. For example, the network device sends a second message to the first device, and the second message instructs the first device to send the first signal to the terminal device, and the second message includes the second indication information. After receiving the second message, the first device can send the first signal according to the second indication information. Among them, the first message or the second message can be an RRC message, a system message, or other types of messages, which are not limited in this application.

[0125] In this application, the signal coverage area of the network device may include multiple first devices. The network device can obtain the location information of each first device, and the network device can also obtain the location information of the terminal device. The network device can determine the distance between each first device and the terminal device based on the above location information, and the network device can send second indication information to the first device that is closest to the terminal device. Alternatively, the network device can send second indication information to the first device with the optimal channel quality with respect to the terminal device, where the channel quality can be measured in advance. How to determine the channel quality is not limited in this application. For example, the channel quality is indicated by RSSI. The terminal device can measure the RSSI between itself and multiple first devices and report the measured multiple RSSIs to the network device. The network device can send second indication information to the first device corresponding to the maximum RSSI.

[0126] In this application, the specific content included in the second indication information is not limited. For example, the second indication information indicates at least one of the following:

[0127] The frequency band or frequency point where the first signal is located; the transmission period of the first signal; the transmission duration of the first signal; the waveform of the first signal; the transmission power of the first signal; the modulation method of the first signal; the coding method of the first signal; the time-frequency resource where the first signal is located.

[0128] Among them, if the second indication information does not indicate one of the pieces of information, then the information is default or preset or preconfigured, or determined by the first device independently. For example, if the second indication information does not indicate the frequency band or frequency point where the first signal is located, then the frequency band or frequency point where the first signal is located is default or preset or preconfigured, or determined by the first device independently. If the second indication information does not indicate the transmission power of the first signal, then the transmission power of the first signal is default or preset or preconfigured, or determined by the first device independently.

[0129] How the network device determines the second indication information is not limited in this application. For example, the network device can determine the frequency band or frequency point where the first signal is located, and the time-frequency resource where the first signal is located, based on the signal reception frequency band or frequency point supported by the terminal device. The frequency band or frequency point where the first signal is located, and the time-frequency resource where the first signal is located, determined by the network device, can match the signal reception frequency band or frequency point supported by the terminal device, so that the terminal device can receive the first signal. For example, if the signal reception frequency point supported by the terminal device is A, then the frequency point of the first signal is also A, which can ensure that the terminal device can receive the first signal.

[0130] For example, the transmission period and transmission duration of the first signal can be determined according to at least one of the remaining energy value, required energy value, and energy collection sensitivity threshold of the terminal device. For example, if the remaining energy value of the terminal device is small, or the required energy value of the terminal device is large, the transmission period of the first signal can be configured to a smaller value, and the transmission duration of the first signal can be configured to a larger value, so that the terminal device can obtain more energy according to the first signal and can obtain the required energy in a timely manner. For example, there is a mapping relationship between the transmission period and transmission duration of the first signal and at least one of the remaining energy value, required energy value, and energy collection sensitivity threshold of the terminal device, and the network device can determine the transmission period and transmission duration of the first signal according to the above mapping relationship.

[0131] For example, the modulation method and waveform of the first signal can be related to the number of supported channels. For example, if the terminal device only supports envelope detection, when the number of data transmission channels is 1, the modulation method of the first signal is OOK, and the waveform of the first signal can be an OOK waveform; if the number of data transmission channels is 2, the modulation method of the first signal is OOK or FSK, and the waveform of the first signal can be an OOK waveform or an FSK waveform.

[0132] For example, the transmission power of the first signal can be determined according to at least one of the matching circuit type of the terminal device, the desired signal reception power, and the energy collection sensitivity threshold. For example, the transmission power of the first signal is greater than the desired signal reception power or the energy collection sensitivity threshold of the terminal device.

[0133] For example, the coding method of the first signal can be related to the charging mode of wireless energy transmission supported by the terminal device.

[0134] The above are only examples. How the network device specifically determines information such as the frequency band or frequency point, transmission period, and transmission duration of the first signal is not limited to the above examples, and there may be other situations, which are not limited in this application.

[0135] Step 1004: The first device sends the first signal.

[0136] Correspondingly, the terminal device receives the first signal. The name of the first signal is not limited, and the first signal can also be called an energy signal. The first signal is used to provide energy for the terminal device. The first signal can also carry information. When the first signal carries information, the specific content of the carried information is not limited.

[0137] Among them, the first device may send a first signal according to the second indication information. For example, the first signal is sent in the frequency band or frequency point indicated by the second indication information, or the first signal is sent in the time-frequency resource indicated by the second indication information. The transmission power of the first signal may be the transmission power indicated by the second indication information, the modulation mode of the first signal may be the modulation mode indicated by the second indication information, the waveform of the first signal may be the waveform indicated by the second indication information, the coding mode of the first signal may be the coding mode indicated by the second indication information, and the transmission duration of the first signal may be the transmission duration indicated by the second indication information. If the first device sends the first signal periodically, the transmission period of the first signal may be the transmission period indicated by the second indication information.

[0138] Correspondingly, the terminal device may receive the first signal according to the second indication information. For example, the terminal device receives the first signal in the frequency band or frequency point indicated by the second indication information, or the terminal device receives the first signal in the time-frequency resource indicated by the second indication information. Other situations will not be elaborated here.

[0139] In this step, the description is made by taking the first device sending the first signal as an example. In practical applications, the network device may also send the first signal. For example, if the network device determines that the terminal device is within the coverage range of its energy signal, the network device may send the first signal. The energy signal refers to a signal used for transmitting energy, such as the first signal.

[0140] Step 1005: The terminal device converts the first signal into energy, and this energy is used to charge the terminal device.

[0141] For example, the terminal device may include an energy storage module (such as a battery), and the terminal device may store the energy in the energy storage module.

[0142] In this application, the present application does not limit how the terminal device specifically converts the first signal into energy. For example, the receiver of the terminal device includes modules such as a BPF, an envelope detector, and an LPF. After the first signal received by the receiver of the terminal device passes through the processing of modules such as the BPF, the envelope detector, and the LPF in sequence, it is converted into a DC signal, and this DC signal is input into the energy storage module to achieve energy storage and charge the terminal device.

[0143] Step 1006: The terminal device sends first information to the network device or the first device.

[0144] If the terminal device sends the first information to the first device, the first device may forward the first information to the network device. Among them, the resource for the terminal device to send the first information may be preset or pre-configured, or may be configured by the network device. For example, the network device sends uplink resource indication information, and the uplink resource indication information indicates the uplink resource. The terminal device may send the first information through this uplink resource.

[0145] In one implementation, if the terminal device obtains energy based on the first signal, then the first information may indicate at least one of the energy storage state and the charging success. The energy storage state may represent the energy value obtained by the terminal device based on the first signal, or the ratio of the remaining energy in the energy storage module of the terminal device to the capacity of the energy storage module. The network device or the first device may determine whether to continue sending the first signal based on the first information, that is, whether to continue charging the terminal device.

[0146] Optionally, if the charging of the terminal device is completed, for example, the energy in the energy storage module of the terminal device reaches the upper limit of the energy storage module capacity, or the energy in the energy storage module of the terminal device is greater than or equal to the energy threshold, then the first information may also indicate to stop charging or stop sending the first signal. For example, the energy threshold is 95%, indicating that the stored energy is 95% of the energy storage module capacity.

[0147] In one implementation, if the terminal device does not obtain energy based on the first signal, for example, the received power of the first signal is less than the energy harvesting sensitivity threshold, resulting in an energy conversion efficiency of 0 for the terminal device, then the first information may indicate an energy transmission failure or that energy has not been obtained through the first signal, or the first information indicates a charging failure, etc. At this time, the first information may also indicate the desired signal reception power, so that the first device or the network device can adjust the transmission power of the first signal according to the first information. For example, the transmission power of the first signal is adjusted to be greater than the desired signal reception power, and the first device may re - send the first signal.

[0148] Through the above process, the network device instructs the first device to send the first signal for energy transmission, enabling the terminal device to obtain energy through the first signal and store the obtained energy, which can improve the working battery life of the terminal device, thus facilitating the satisfaction of the energy harvesting requirements of the terminal device. The terminal device can also indicate the energy storage state through the first information, enabling the network device or the first device to determine whether the terminal device needs to continue charging.

[0149] Example 2:

[0150] In this application, the first device may also initiate wireless energy transmission to the terminal device actively without receiving the indication information from the network device, which is described in detail below.

[0151] As Figure 11As shown in the figure, it is a schematic flowchart of a communication method provided by an embodiment of the present application. In this method flowchart, the terminal device can also be replaced by a tag, or device A, or device B, or device C, or an AIoT device, and the first device can also be replaced by a terminal device or an energy charging node. The names of various signals, messages, or information in this method flowchart are only examples. There may be other names for various signals, messages, or information in this method flowchart, which will not be elaborated here. The method includes:

[0152] Step 1101: The first device sends a first signal to the terminal device.

[0153] Correspondingly, the terminal device receives the first signal.

[0154] In one implementation, at least one of the following parameters of the first signal is preset or preconfigured, or at least one of the following parameters of the first signal is independently determined by the first device:

[0155] The frequency band or frequency point where the first signal is located; the transmission period of the first signal. For example, the transmission period can be an integer multiple of the synchronization signal period, or determined according to the minimum service period; the transmission duration of the first signal. For example, it can be determined according to the bandwidth, frequency band of the first signal, and the energy required for the terminal device to transmit uplink information, or determined according to the minimum warning threshold for the terminal device to be in a low-energy state warning; the waveform of the first signal; the transmission power of the first signal. For example, it can be the maximum transmission power of the first device; the modulation method of the first signal; the coding method of the first signal; the time-frequency resource where the first signal is located.

[0156] In this implementation, the first device can send the first signal in a preset or preconfigured frequency band or frequency point, and the transmission period, transmission duration, etc. of the first signal are all preset or preconfigured. For example, a common energy transmission frequency band can be preconfigured for wireless energy transmission, so that the first device can send the first signal in the common energy transmission frequency band. Correspondingly, the terminal device can receive the first signal in a preset or preconfigured frequency band or frequency point.

[0157] In this implementation, the first device can send the first signal using the maximum transmission power, or can also send the first signal using a transmission power greater than or equal to the energy harvesting sensitivity threshold of the terminal device. The present application does not limit this. Other parameters of the first signal can also be preset or preconfigured, which will not be elaborated here.

[0158] Step 1102: The terminal device converts the first signal into energy, and this energy is used to charge the terminal device.

[0159] How the terminal device specifically converts the first signal into energy is not limited by the present application. For example, reference can be made to the description in step 1005.

[0160] Step 1103: The terminal device sends first information to the first device.

[0161] The specific meaning of the first information will not be elaborated here. For example, reference can be made to the description in Step 1006. Step 1103 is an optional step, and the terminal device may not send the first information.

[0162] Among them, the resource for the terminal device to send the first information can be preset or preconfigured.

[0163] After executing the above process, the process shown below can also be executed Figure 10 so that the terminal device can obtain more energy.

[0164] In the method, the parameters of the first signal are preset or preconfigured, or determined independently by the first device, and there is no need for the network device to configure various parameters of the first signal. This can simplify the transmission process of the first signal. The first device can send the first signal without receiving the second indication information. Correspondingly, the terminal device can receive the first signal without receiving the second indication information, so as to quickly obtain energy. This implementation method is particularly suitable for scenarios where the energy of the terminal device is very low. When the energy of the terminal device is very low, there may not be enough energy for information interaction with the network device. For example, the second information cannot be reported. At this time, the first signal sent by the first device can charge the terminal device in time, ensure the normal operation of the terminal device, avoid the terminal device from being unable to access the network due to energy exhaustion, and solve the problem of the terminal device restarting after energy exhaustion.

[0165] Example 3:

[0166] In this application, the terminal device can also initiate wireless energy transmission actively and request the network device or the first device to send a signal for energy transmission. The following is a detailed description.

[0167] As Figure 12 shown, it is a schematic diagram of a communication method flow provided by an embodiment of this application. In this method flow, the terminal device can also be replaced by a tag, or device A, or device B, or device C, or an AIoT device, and the first device can also be replaced by a terminal device or an energy charging node. The names of the various signals, messages, or information in this method flow are only examples. There may be other names for the various signals, messages, or information in this method flow, which will not be elaborated here. The method includes:

[0168] Step 1200: The terminal device sends first indication information to the network device or the first device.

[0169] Among them, the first indication information is used to request a signal for transmitting energy, or the first indication information indicates that the remaining energy value of the terminal device is less than or equal to a threshold value, where the threshold value is preset or preconfigured or configured by the network device. The first indication information can also be referred to as energy warning or energy request (Power request / Power warning) information, and the present application does not limit the name of the first indication information.

[0170] The terminal device may send the first indication information when determining that the remaining energy value is less than or equal to the threshold value. The threshold value is preset or preconfigured. The threshold value is an energy value or an energy ratio. For example, if the threshold value is 10%, then the ratio of the remaining energy of the energy storage module of the terminal device to the capacity of the energy storage module is less than or equal to 10%, and the terminal device sends the first indication information.

[0171] Optionally, when sending the first indication information, the terminal device may also send a second piece of information, and the second piece of information may refer to the description in step 1202.

[0172] In one implementation, the frequency resource carrying the first indication information is preset or preconfigured. This can ensure that the terminal device can send the first indication information in a timely manner, avoid the terminal device shutting down due to too low energy, and ensure the effective transmission of services.

[0173] In one implementation, the terminal device may send a random access preamble, and the random access preamble corresponds to the first indication information. The correspondence between the random access preamble and the first indication information is preset or preconfigured. When the network device or the first device receives the random access preamble, it can determine that the energy of the terminal device is low and wireless energy transmission is required. This method is particularly applicable to a terminal device in the RRC idle state. In this way, during the random access process, it can be indicated through the random access preamble that the terminal device needs to be charged, improving the charging efficiency.

[0174] Step 1201: The network device sends a detection signal, and the detection signal indicates to report the second piece of information.

[0175] Correspondingly, the terminal device receives the detection signal.

[0176] Step 1202: The terminal device sends the second piece of information.

[0177] Step 1203: The network device sends second indication information to the terminal device and the first device.

[0178] Correspondingly, the terminal device receives the second indication information, and the first device receives the second indication information.

[0179] Step 1204: The first device sends the first signal.

[0180] Correspondingly, the terminal device receives the first signal.

[0181] Step 1205: The terminal device converts the first signal into energy, which is used to charge the terminal device.

[0182] Step 1206: The terminal device sends the first information to the network device or the first device.

[0183] For the specific processes of Step 1201 to Step 1206, reference may be made to the descriptions of Step 1001 to Step 1006, which will not be elaborated herein.

[0184] Through the above process, the terminal device can quickly obtain the first signal by actively instructing the network device to send the first signal for energy transmission, thereby obtaining energy through the first signal, improving the energy acquisition efficiency, and preventing the terminal device from running out of energy.

[0185] It can be understood that, in order to implement the functions in the above embodiments, the terminal device, the network device, or the first device includes the corresponding hardware structures and / or software modules for executing each function. Those skilled in the art should easily realize that, in combination with the units and method steps of the examples described in the embodiments disclosed in this application, this application can be implemented in the form of hardware or a combination of hardware and computer software. Whether a certain function is executed in the way of hardware or computer software driving the hardware depends on the specific application scenario and design constraints of the technical solution.

[0186] The following is a schematic structural diagram of a possible communication device provided by the embodiments of this application. These communication devices can be used to implement the functions of the terminal device, the network device, or the first device in the above method embodiments, and thus can also achieve the beneficial effects possessed by the above method embodiments.

[0187] As Figure 13 shown, the communication device 1300 includes a processing unit 1310 and a communication unit 1320. The communication device 1300 is used to implement the functions of the terminal device, the network device, or the first device in each of the above - shown method embodiments.

[0188] In one implementation, the communication device 1300 is used to implement the following functions:

[0189] The processing unit is used to receive, through the communication unit, the first signal from the first device; the first signal is used for energy transmission;

[0190] The communication unit is used to convert the first signal into energy, and the energy is used to charge the terminal device;

[0191] The processing unit is configured to send first information to a network device or the first device via the communication unit; the first information indicates at least one of an energy storage state and a charging success.

[0192] In a possible implementation, at least one of the following parameters of the first signal is preset or preconfigured or indicated by second indication information from the network device:

[0193] The frequency band or frequency point where the first signal is located; the transmission period of the first signal; the transmission duration of the first signal; the waveform of the first signal; the transmission power of the first signal; the modulation mode of the first signal; the coding mode of the first signal; the time-frequency resource where the first signal is located.

[0194] In a possible implementation, before receiving the first signal from the first device, the processing unit is further configured to:

[0195] Determine that the remaining energy value is less than or equal to a threshold, and send first indication information to the network device or the first device via the communication unit; the first indication information requests a signal for transmitting energy.

[0196] In a possible implementation, the communication unit is further configured to:

[0197] Send second information to the network device or the first device;

[0198] Wherein, the second information includes at least one of the following:

[0199] Indicating whether wireless energy transmission is supported; the remaining energy value; the required energy value; the desired signal reception power; the RSSI or RSRP of the detection signal; the charging mode of the supported wireless energy transmission; the supported signal reception frequency band or frequency point.

[0200] In one implementation, the communication device 1300 is configured to implement the following functions:

[0201] The processing unit is configured to determine second indication information; the second indication information is used to configure a first signal for transmitting energy to the terminal device;

[0202] The communication unit is configured to send the second indication information to the terminal device and the first device, and the first device is configured to send the first signal to the terminal device.

[0203] In a possible implementation, the second indication information indicates at least one of the following:

[0204] The frequency band or frequency point where the first signal is located; the transmission period of the first signal; the transmission duration of the first signal; the waveform of the first signal; the transmission power of the first signal; the modulation method of the first signal; the coding method of the first signal; the time-frequency resource where the first signal is located.

[0205] In a possible implementation, the communication unit is further configured to:

[0206] Receive second information of the terminal device;

[0207] Wherein, the second information includes at least one of the following: an indication of whether wireless energy transmission is supported; the remaining energy value; the required energy value;

[0208] The desired signal reception power; the received signal strength indication (RSSI) or reference signal received power (RSRP) of the detection signal; the charging mode of the supported wireless energy transmission; the supported signal reception frequency band or frequency point.

[0209] In a possible implementation, the second indication information is determined according to the second information.

[0210] In an implementation, the communication device 1300 is configured to implement the following functions:

[0211] A processing unit, configured to determine a first signal, where the first signal is used to transmit energy to the terminal device;

[0212] A communication unit, configured to send the first signal to the terminal device; receive first information from the terminal device; the first information indicates at least one of the energy storage state and charging success of the terminal device.

[0213] In a possible implementation, at least one of the following parameters of the first signal is preset or pre-configured:

[0214] The frequency band or frequency point where the first signal is located; the transmission period of the first signal; the transmission duration of the first signal; the waveform of the first signal; the transmission power of the first signal; the modulation method of the first signal; the coding method of the first signal; the time-frequency resource where the first signal is located.

[0215] For a more detailed description of the above processing unit 1310 and communication unit 1320, reference can be directly made to the relevant descriptions in the above respective method embodiments and will not be elaborated here.

[0216] It should be understood that the division of units in the above device is only a division of logical functions. In actual implementation, all or part of them can be integrated into a physical entity, or physically separated. And the units in the device can all be implemented in the form of software called by processing elements; they can also all be implemented in the form of hardware; or some units can be implemented in the form of software called by processing elements, and some units can be implemented in the form of hardware. For example, each unit can be a separately established processing element, or can be integrated in a certain chip of the device. In addition, it can also be stored in the memory in the form of a program, and the function of the unit can be called and executed by a certain processing element of the device. In addition, all or part of these units can be integrated together or can be independently implemented. Here, the processing element can also be a processor, which can be an integrated circuit with signal processing capabilities. In the implementation process, each operation of the above method or each of the above units can be implemented through the integrated logic circuit of the hardware in the processor element or in the form of software called by the processing element.

[0217] In one example, the units in any of the above devices can be one or more integrated circuits configured to implement the above method. For example: one or more application specific integrated circuits (ASICs), or, one or more digital signal processors (DSPs), or, one or more field programmable gate arrays (FPGAs), or a combination of at least two of these integrated circuit forms. Again, when the units in the device can be implemented in the form of a processing element scheduler, the processing element can be a processor, such as a general central processing unit (CPU), or other processors that can call programs. Again, these units can be integrated together and implemented in the form of a system-on-a-chip (SOC).

[0218] The above unit for receiving is an interface circuit of the device, which is used to receive signals from other devices. For example, when the device is implemented in the form of a chip, the receiving unit is the interface circuit of the chip for receiving signals from other chips or devices. The above unit for sending is an interface circuit of the device, which is used to send signals to other devices. For example, when the device is implemented in the form of a chip, the sending unit is the interface circuit of the chip for sending signals to other chips or devices.

[0219] As another possible product form, the terminal device or network device of the embodiments of the present application can be implemented by a general bus architecture. For the sake of illustration, seeFigure 14 , Figure 14 is a schematic structural diagram of a communication device 1400 provided by an embodiment of the present application. The communication device 1400 includes a processor 1401 and a transceiver 1402. The communication device 1400 may be a terminal device, or a chip or a chip system therein; alternatively, the communication device 1400 may be a network device, or a chip or a module therein. Figure 14 Only the main components of the communication device 1400 are shown. In addition to the processor 1401 and the transceiver 1402, the communication device 1400 may further include a memory 1403 and an input / output device (not shown in the figure).

[0220] Optionally, the processor 1401 is mainly used to process communication protocols and communication data, control the entire communication device, execute software programs, and process data of software programs. The memory 1403 is mainly used to store software programs and data. The transceiver 1402 may include a radio frequency circuit and an antenna. The radio frequency circuit is mainly used for the conversion between baseband signals and radio frequency signals and the processing of radio frequency signals. The antenna is mainly used to transmit and receive radio frequency signals in the form of electromagnetic waves. Input / output devices, such as touch screens, displays, keyboards, etc., are mainly used to receive data input by users and output data to users.

[0221] Optionally, the processor 1401, the transceiver 1402, and the memory 1403 may be connected through a communication bus.

[0222] After the communication device is powered on, the processor 1401 may read the software program in the memory 1403, interpret and execute the instructions of the software program, and process the data of the software program. When data needs to be wirelessly transmitted, the processor 1401 performs baseband processing on the data to be transmitted and then outputs a baseband signal to the radio frequency circuit. The radio frequency circuit performs radio frequency processing on the baseband signal and then transmits the radio frequency signal outward in the form of electromagnetic waves through the antenna. When data is sent to the communication device, the radio frequency circuit receives the radio frequency signal through the antenna, converts the radio frequency signal into a baseband signal, and outputs the baseband signal to the processor 1401. The processor 1401 converts the baseband signal into data and processes the data.

[0223] In another implementation, the radio frequency circuit and the antenna may be set independently of the processor performing baseband processing. For example, in a distributed scenario, the radio frequency circuit and the antenna may be independent of the communication device and arranged in a remote manner.

[0224] In some embodiments, in terms of hardware implementation, those skilled in the art can think that the above communication device 1300 may adopt Figure 14 the form of the communication device 1400 shown.

[0225] As an example, Figure 13The function / implementation process of the processing unit 1310 in can be achieved by Figure 14 the processor 1401 in the communication device 1400 shown in calling the computer-executable instructions stored in the memory 1403. Figure 13 The function / implementation process of the communication unit 1320 in can be achieved by Figure 14 the transceiver 1402 in the communication device 1400 shown in.

[0226] As another possible product form, the terminal device or network device in this application may adopt Figure 15 the composition structure shown in, or include Figure 15 the components shown in. Figure 15 FIG. is a schematic diagram of the composition of a communication device 1500 provided by this application.

[0227] As shown in Figure 15 , the communication device 1500 includes at least one processor 1501. Optionally, the communication device further includes a communication interface 1502.

[0228] When the program instructions involved are executed in the at least one processor 1501, the device 1500 can implement the method provided in any of the foregoing embodiments and any possible design thereof. Alternatively, the processor 1501 is used to implement the method provided in any of the foregoing embodiments and any possible design thereof through logic circuits or by executing code instructions.

[0229] The communication interface 1502 can be used to receive program instructions and transmit them to the processor. Alternatively, the communication interface 1502 can be used for the communication device 1500 to communicate with other communication devices, such as to interact control signaling and / or service data, etc. Exemplarily, the communication interface 1502 can be used to receive signals from other devices outside the communication device 1500 and transmit them to the processor 1501 or send signals from the processor 1501 to other communication devices outside the communication device 1500.

[0230] Optionally, the communication interface 1502 can be a code and / or data read / write interface circuit, or the communication interface 1502 can be a signal transmission interface circuit between a communication processor and a transceiver, or a pin of a chip.

[0231] Optionally, the communication device 1500 may further include at least one memory 1503, and the memory 1503 can be used to store the required program instructions and / or data involved. It should be noted that the memory 1503 can exist independently of the processor 1501 or be integrated with the processor 1501. The memory 1503 can be located inside the communication device 1500 or outside the communication device 1500, without limitation.

[0232] Optionally, the communication device 1500 may further include a power supply circuit 1504, which can be used to supply power to the processor 1501. The power supply circuit 1504 may be located within the same chip as the processor 1501, or within another chip outside the chip where the processor 1501 is located.

[0233] Optionally, the communication device 1500 may further include a bus, and various parts in the communication device 1500 may be interconnected through the bus.

[0234] In some embodiments, in terms of hardware implementation, those skilled in the art can conceive of the above Figure 13 The illustrated communication device 1300 may adopt Figure 15 the form of the illustrated communication device 1500.

[0235] As an example, Figure 13 the function / implementation process of the processing unit 1310 in Figure 15 can be implemented by the processor 1501 in the illustrated communication device 1500 calling computer execution instructions stored in the memory 1503. Figure 13 The function / implementation process of the communication unit 1320 in Figure 15 can be implemented by the communication interface 1502 in the illustrated communication device 1500.

[0236] It should be noted that Figure 15 the illustrated structure does not constitute a specific limitation on the terminal device or the network device or the first device. For example, in other embodiments of the present application, the terminal device or the network device may include more or fewer components than shown in the figure, or combine certain components, or split certain components, or have different component arrangements. The illustrated components may be implemented in hardware, software, or a combination of software and hardware.

[0237] When the above communication device is a chip applied to a terminal, the terminal chip implements the functions of the terminal in the above method embodiments. The terminal chip receives information from other modules in the terminal (such as a radio frequency module or an antenna), and this information is sent by the base station to the terminal; or, the terminal chip sends information to other modules in the terminal (such as a radio frequency module or an antenna), and this information is sent by the terminal to the base station.

[0238] When the above communication device is a module applied to a base station, the base station module implements the functions of the base station in the above method embodiments. The base station module receives information from other modules in the base station (such as a radio frequency module or an antenna), and this information is sent by a terminal to the base station; or, the base station module sends information to other modules in the base station (such as a radio frequency module or an antenna), and this information is sent by the base station to the terminal. Here, the base station module can be a baseband chip of the base station, or a DU or other module. Here, the DU can be a DU under an open radio access network (O-RAN) architecture.

[0239] It can be understood that the processor in the embodiments of the present application can be a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSPs), application specific integrated circuits (ASICs), field programmable gate arrays (FPGAs), or other programmable logic devices, transistor logic devices, hardware components, or any combination thereof. The general-purpose processor can be a microprocessor or any conventional processor.

[0240] The method steps in the embodiments of the present application can be implemented in a hardware manner, or can be implemented by a processor executing software instructions. The software instructions can be composed of corresponding software modules. The software modules can be stored in a random access memory, flash memory, read-only memory, programmable read-only memory, erasable programmable read-only memory, electrically erasable programmable read-only memory, registers, hard disks, removable hard disks, CD-ROMs, or any other form of storage medium well-known in the art. An exemplary storage medium is coupled to the processor, so that the processor can read information from the storage medium and write information to the storage medium. Of course, the storage medium can also be a component of the processor. The processor and the storage medium can be located in an ASIC. In addition, the ASIC can be located in a base station or a terminal. Of course, the processor and the storage medium can also exist as discrete components in a base station or a terminal.

[0241] In the above embodiments, it can be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented using software, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer programs or instructions. When the computer program or instructions are loaded and executed on a computer, the processes or functions described in the embodiments of the present application are executed in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network, a network device, a user device, or other programmable devices. The computer program or instructions can be stored in a computer-readable storage medium, or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer program or instructions can be transmitted from one website, computer, server, or data center to another website, computer, server, or data center in a wired or wireless manner. The computer-readable storage medium can be any available medium that can be accessed by a computer, or a data storage device such as a server or data center that integrates one or more available media. The available medium can be a magnetic medium, such as a floppy disk, a hard disk, or a magnetic tape; it can also be an optical medium, such as a digital video disc; or it can be a semiconductor medium, such as a solid-state drive. The computer-readable storage medium can be a volatile or non-volatile storage medium, or can include both volatile and non-volatile types of storage media.

[0242] In various embodiments of the present application, if there is no special description and logical conflict, the terms and / or descriptions between different embodiments are consistent and can be referenced to each other. The technical features in different embodiments can be combined to form new embodiments according to their inherent logical relationships.

[0243] Those skilled in the art should understand that the embodiments of the present application can be provided as a method, a system, or a computer program product. Therefore, the present application can take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware aspects. Moreover, the present application can take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, optical storage, etc.) containing computer-usable program code.

[0244] The present application is described with reference to the flowcharts and / or block diagrams of methods, devices (systems), and computer program products according to the present application. It should be understood that each process and / or block in the flowchart and / or block diagram, and the combination of processes and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to the processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing devices to generate a machine, such that the instructions executed by the processor of the computer or other programmable data processing devices generate for implementing in the processFigure 1 one or more processes and / or blocks Figure 1 means for the functions specified in one or more blocks

[0245] These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means that implement the functions specified in one Figure 1 one or more processes and / or blocks Figure 1 or more processes and / or one or more blocks

[0246] Obviously, those skilled in the art can make various changes and modifications to this application without departing from the scope of this application. Thus, if these modifications and variations of this application fall within the scope of the claims of this application and their equivalent technologies, this application is also intended to include these changes and modifications.

Claims

1. A communication method, characterized in that: include: Receiving a first signal from a first device; the first signal is used to transmit energy; Convert the first signal into energy, where the energy is used to charge the terminal device; Sending first information to a network device or the first device; the first information indicates at least one of an energy storage state and a charging success.

2. The method according to claim 1, characterized in that At least one of the following parameters of the first signal is preset or preconfigured: The frequency band or frequency point where the first signal is located; the transmission period of the first signal; the transmission duration of the first signal; the waveform of the first signal; the transmission power of the first signal; the modulation method of the first signal; the encoding method of the first signal; and the time-frequency resources where the first signal is located.

3. The method according to claim 1, characterized in that Before receiving the first signal from the first device, the method further includes: receiving a detection signal from the network device, wherein the detection signal indicates reporting second information; Sending the second information to the network device or the first device; The second information includes at least one of the following: Indicates whether wireless energy transfer is supported; Remaining energy value; Required energy value; Expected signal received power; The received signal strength indication RSSI or the reference signal received power RSRP of the detection signal; Supported charging modes for wireless energy transmission; Supported signal reception bands or frequencies.

4. The method according to claim 1, characterized in that: Before receiving the first signal from the first device, the method further includes: Determine that the remaining energy value is less than or equal to a threshold, and send first indication information to the network device or the first device; the first indication information requests a signal for transmitting energy.

5. The method according to claim 4, characterized in that The sending the first indication information to the network device or the first device includes: A random access preamble is sent to the network device or the first device, where the random access preamble corresponds to the first indication information.

6. The method according to any one of claims 4 to 5, characterized in that: The method further comprises: Sending second information to the network device or the first device; The second information includes at least one of the following: Indicates whether wireless energy transfer is supported; Remaining energy value; Required energy value; Expected signal received power; RSSI or RSRP of the detection signal; Supported charging modes for wireless energy transmission; Supported signal reception bands or frequencies.

7. The method according to claim 3 or 6, characterized in that: The method further comprises: Receive second indication information from the network device, where the second indication information indicates at least one of the following: The frequency band or frequency point where the first signal is located; the transmission period of the first signal; the transmission duration of the first signal; the waveform of the first signal; the transmission power of the first signal; the modulation method of the first signal; the encoding method of the first signal; and the time-frequency resources where the first signal is located.

8. The method according to claim 7, characterized in that The second indication information is determined according to the second information.

9. A communication method, characterized in that: include: determining second indication information; The second indication information is used to configure a first signal, where the first signal is used to transmit energy to the terminal device; The second indication information is sent to the terminal device and the first device, and the first device is used to send the first signal to the terminal device.

10. The method according to claim 9, characterized in that The second indication information indicates at least one of the following: The frequency band or frequency point where the first signal is located; the transmission period of the first signal; the transmission duration of the first signal; the waveform of the first signal; the transmission power of the first signal; the modulation method of the first signal; the encoding method of the first signal; and the time-frequency resources where the first signal is located.

11. The method according to claim 10, characterized in that The method further comprises: receiving second information of the terminal device; The second information includes at least one of the following: Indicates whether wireless energy transfer is supported; Remaining energy value; Required energy value; Expected signal received power; The received signal strength indication RSSI or the reference signal received power RSRP of the detection signal; Supported charging modes for wireless energy transmission; Supported signal reception bands or frequencies.

12. The method according to claim 11, characterized in that The second indication information is determined according to the second information.

13. The method according to claim 11, characterized in that Before receiving the second information of the terminal device, the method further includes: A detection signal is sent to the terminal device, wherein the detection signal indicates to report the second information.

14. The method according to any one of claims 9 to 13, characterized in that: Before sending the second indication information, the method further includes: Receive first indication information; the first indication information requests a signal for transmitting energy.

15. The method according to any one of claims 9 to 14, characterized in that: The method further comprises: Receive first information; the first information indicates at least one of the energy storage status and charging success of the terminal device.

16. A communication method, characterized in that: include: Determining a first signal, where the first signal is used to transmit energy to a terminal device; Sending the first signal to the terminal device; Receiving first information from the terminal device; The first information indicates at least one of an energy storage status and charging success of the terminal device.

17. The method according to claim 16, characterized in that At least one of the following parameters of the first signal is preset or preconfigured: The frequency band or frequency point where the first signal is located; the transmission period of the first signal; the transmission duration of the first signal; the waveform of the first signal; the transmission power of the first signal; the modulation method of the first signal; the encoding method of the first signal; and the time-frequency resources where the first signal is located.

18. The method according to claim 16 or 17, characterized in that The method further comprises: Receive second indication information from the network device, where the second indication information indicates at least one of the following: The frequency band or frequency point where the first signal is located; the transmission period of the first signal; the transmission duration of the first signal; the waveform of the first signal; the transmission power of the first signal; the modulation method of the first signal; the encoding method of the first signal; and the time-frequency resources where the first signal is located.

19. A communication device, characterized in that: include: A processing unit, configured to receive a first signal from a first device through a communication unit; the first signal is used to transmit energy; The communication unit is used to convert the first signal into energy, and the energy is used to charge the terminal device; The processing unit is used to send first information to the network device or the first device through the communication unit; the first information indicates at least one of an energy storage state and charging success.

20. The device according to claim 19, characterized in that At least one of the following parameters of the first signal is preset or preconfigured or indicated by second indication information from the network device: The frequency band or frequency point where the first signal is located; the transmission period of the first signal; the transmission duration of the first signal; the waveform of the first signal; the transmission power of the first signal; the modulation method of the first signal; the encoding method of the first signal; and the time-frequency resources where the first signal is located.

21. The device according to claim 19, characterized in that Before receiving the first signal from the first device, the processing unit is further configured to: Determine that the remaining energy value is less than or equal to a threshold value, and send first indication information to the network device or the first device through the communication unit; the first indication information requests a signal for transmitting energy.

22. The device according to any one of claims 19 to 21, characterized in that The communication unit is also used for: Sending second information to the network device or the first device; The second information includes at least one of the following: Indicates whether wireless energy transfer is supported; Remaining energy value; Required energy value; Expected signal received power; RSSI or RSRP of the detection signal; Supported charging modes for wireless energy transfer; Supported signal reception bands or frequencies.

23. A communication device, characterized in that: include: A processing unit, configured to determine second indication information; The second indication information is used to configure a first signal, where the first signal is used to transmit energy to the terminal device; A communication unit is used to send the second indication information to the terminal device and the first device, and the first device is used to send the first signal to the terminal device.

24. The device according to claim 23, characterized in that The second indication information indicates at least one of the following: The frequency band or frequency point where the first signal is located; the transmission period of the first signal; the transmission duration of the first signal; the waveform of the first signal; the transmission power of the first signal; the modulation method of the first signal; the encoding method of the first signal; and the time-frequency resources where the first signal is located.

25. The device according to claim 24, characterized in that The communication unit is also used for: receiving second information of the terminal device; The second information includes at least one of the following: Indicates whether wireless energy transfer is supported; Remaining energy value; Required energy value; Expected signal received power; The received signal strength indication RSSI or the reference signal received power RSRP of the detection signal; Supported charging modes for wireless energy transfer; Supported signal reception bands or frequencies.

26. The device according to claim 25, characterized in that The second indication information is determined according to the second information.

27. A communication device, characterized in that: include: A processing unit, configured to determine a first signal, wherein the first signal is used to transmit energy to a terminal device; A communication unit, configured to send the first signal to the terminal device; Receive first information from the terminal device; the first information indicates at least one of an energy storage state and charging success of the terminal device.

28. The device according to claim 27, characterized in that At least one of the following parameters of the first signal is preset or preconfigured: The frequency band or frequency point where the first signal is located; the transmission period of the first signal; the transmission duration of the first signal; the waveform of the first signal; the transmission power of the first signal; the modulation method of the first signal; the encoding method of the first signal; and the time-frequency resources where the first signal is located.

29. A communication system, characterized in that: include: A terminal device, a network device and a first device; The terminal device is used to implement the method according to any one of claims 1 to 8; The network device is used to implement the method according to any one of claims 9 to 15; The first device is used to implement the method according to any one of claims 16 to 18.

30. A communication device, characterized in that: including a processor and a memory; The processor is configured to execute the computer program or instructions stored in the memory, so that the communication device implements the method according to any one of claims 1 to 18.

31. A computer-readable storage medium, characterized in that: A computer program or instruction is stored, and when the computer program or instruction is executed on a computer, the computer is caused to implement the method according to any one of claims 1 to 18.

32. A chip, characterized in that: The chip comprises a processor, which is coupled to a memory and is used to execute a computer program or instruction stored in the memory, so that the chip implements the method according to any one of claims 1 to 18.

33. A computer program product, characterized in that When a computer reads and executes the computer program product, the method according to any one of claims 1 to 18 is executed.

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