Communication method and apparatus

Abstract

A communication method and apparatus, which are suitable for the fields of V2X, intelligent driving, Internet of vehicles, Internet of things, etc. The method comprises: receiving a first signal from a first device, wherein the first signal is used for transmitting energy; converting the first signal into energy, wherein the energy is used for charging a terminal device; and sending first information to a network device or the first device, wherein the first information indicates at least one of an energy storage state and a charging success. By means of the above process, a first device sends a first signal used for transmitting energy, so as to charge a terminal device, such that the terminal device may obtain energy by means of a wireless signal, thereby prolonging the working endurance time of the terminal device. The terminal device may also indicate an energy storage state by means of first information, such that a network device or the first device can determine whether the terminal device requires continued charging.

Description

Communication method and device

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to the Chinese patent application filed with the State Intellectual Property Office of the People's Republic of China on November 17, 2023, with application number 202311550396.2 and invention name "A Communication Method and Device", the entire contents of which are incorporated by reference into this application. Technical Field

[0003] The present application relates to the field of communication technology, and in particular to a communication method and device. Background Art

[0004] With the widespread adoption of 5G New Radio (NR) systems and Internet of Things (IoT) communications, an increasing number of IoT devices have been deployed in our daily lives. Examples include smart water meters, shared bicycles, and devices focused on sensing and data collection for smart cities, environmental monitoring, smart homes, and forest fire prevention. Currently, IoT devices communicate with base stations using cellular protocols. Because base stations must cover as large an area as possible, IoT devices at a distance from the base station consume up to 30 milliamperes (mA) of current during wireless communication. Consequently, current IoT devices require high-capacity batteries to operate.

[0005] However, due to the limited size of IoT devices, extending their operating time is difficult to achieve simply by increasing battery capacity. Since batteries can only store a limited amount of energy, regularly replacing batteries for a large number of IoT devices would consume significant manpower and time. Therefore, research is currently underway to provide power to IoT devices through wireless energy transmission.

[0006] However, how to achieve wireless energy transmission for IoT devices is an urgent problem to be solved.

[0007] Summary of the Invention

[0008] The present application provides a communication method and apparatus for wirelessly transmitting energy to a device.

[0009] In a first aspect, the present application provides a communication method applicable to scenarios such as the environmental Internet of Things. The method is performed by a terminal device or a module or chip in the terminal device, and is described herein using the terminal device as an example. In the method, a first signal is received from a first device; 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; and first information is sent to a network device or the first device; the first information indicates at least one of an energy storage status and a successful charge.

[0010] Through the above process, by sending the first signal for energy transmission to charge the terminal device, the terminal device can obtain energy through wireless signals, thereby improving the operating life of the terminal device. The terminal device can also indicate the energy storage status through the first information, allowing the network device or the first device to determine whether the terminal device needs to continue charging.

[0011] 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 method of the first signal; the encoding method of the first signal; and the time-frequency resources where the first signal is located.

[0012] Since the above parameters of the first signal are preset or preconfigured, there is no need to indicate these parameters through signaling of the network device, which allows the terminal device to obtain energy in a timely manner and improve energy transmission efficiency.

[0013] In one implementation, before receiving the first signal from the first device, the method also includes: receiving a detection signal from the network device, the detection signal indicating reporting of second information; sending the second information to the network device or the first device; 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; the expected signal receiving power; the RSSI or RSRP of the detection signal; the charging mode of the supported wireless energy transmission; and the supported signal receiving frequency band or frequency point.

[0014] In the above method, the terminal device can report the second information to enable the network device to determine how to instruct the first device to send the first signal. For example, the transmission power of the first signal can be determined based on the signal reception power expected by the terminal device, and the transmission duration of the first signal can be determined based on the remaining energy value or the required energy value, etc., which is conducive to transmitting energy for the terminal device.

[0015] 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 message to the network device or the first device; the first indication message requests a signal for transmitting energy.

[0016] In the above method, the terminal device actively requests to transmit energy, which can solve the problem that the terminal device is difficult to access the network when the power is exhausted, and avoid the situation where the terminal device is exhausted.

[0017] 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.

[0018] In one implementation, the frequency resource carrying the first indication information is preset or preconfigured.

[0019] In one implementation, the method further includes: sending the second information to the network device or the first device; 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; the expected signal receiving power; the RSSI or RSRP of the detection signal; the charging mode of the supported wireless energy transmission; and the supported signal receiving frequency band or frequency point.

[0020] In one implementation, the method also 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 encoding method of the first signal; and the time-frequency resources where the first signal is located.

[0021] In one implementation, the second indication information is determined based on the second information.

[0022] In a second aspect, the present application provides a communication method applicable to scenarios such as the environmental Internet of Things. The method is performed by a network device or a module or chip within the network device, and is described herein using the network device as the example. In this method, second indication information is determined; the second indication information is used to configure a first signal, which is used to transmit energy to a terminal device; the second indication information is sent to the terminal device and a first device, and the first device is used to send the first signal to the terminal device.

[0023] 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 encoding method of the first signal; and the time-frequency resources where the first signal is located.

[0024] In one implementation, the method further includes: receiving second information of the terminal device; 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; the expected signal receiving power; the RSSI or RSRP of the detection signal; the charging mode of the supported wireless energy transmission; and the supported signal receiving frequency band or frequency point.

[0025] In one implementation, the second indication information is determined based on the second information.

[0026] In one implementation, before receiving the second information from the terminal device, the method further includes: sending a detection signal to the terminal device, where the detection signal instructs reporting of the second information.

[0027] 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.

[0028] In one implementation, the method further includes: receiving first information; the first information indicates at least one of an energy storage status and charging success of the terminal device.

[0029] In one implementation, the terminal device is a semi-active device or an active device.

[0030] On the third aspect, the present application provides a communication method, which is applicable to scenarios such as the environmental Internet of Things. The execution subject of the method is a first device or a module or chip in the first device, and the first device is used as the execution subject for description here. The first device may refer to a device that provides a signal for transmitting energy (for a 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. In the method, a first signal is determined, and the first signal is used to transmit energy to a terminal device; the first signal is sent to the terminal device; a first information is received from the terminal device; and the first information indicates at least one of the energy storage status and charging success of the terminal device.

[0031] In one implementation, at least one of the following parameters of the first signal is preset or preconfigured:

[0032] 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.

[0033] In one implementation, the method also 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 encoding method of the first signal; and the time-frequency resources where the first signal is located.

[0034] In a possible implementation, the terminal device is an environmental Internet of Things terminal device, or the terminal device is a semi-active device or an active device.

[0035] In a fourth aspect, the present application further provides a communication device capable of implementing any of the methods provided in any of the first to third aspects above. The communication device can be implemented via hardware, or by hardware executing corresponding software implementations. The hardware or software includes one or more units or modules corresponding to the above functions.

[0036] In one possible implementation, the communication device includes a processor configured to support the communication device in executing the corresponding functions of the network device, terminal device, or first device in the above-described method. The communication device may also include a memory, which may be coupled to the processor and stores program instructions and data necessary for the communication device. Optionally, the communication device also includes an interface circuit for supporting communication between the communication device and a device such as a terminal device.

[0037] In one possible implementation, the communication device includes corresponding functional modules for implementing the steps in the above method. 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.

[0038] In one possible implementation, the structure of the communication device includes a processing unit and a communication unit, which can perform the corresponding functions in the above method examples. For details, please refer to the description of the method provided in any one of the first to third aspects, which will not be repeated here.

[0039] In a fifth aspect, a communication device is provided, comprising a unit or module for executing the method in any possible implementation of any one of the first to third aspects above.

[0040] In a sixth aspect, a communication device is provided, comprising a processor and an interface circuit, wherein the interface circuit is configured to receive signals from a communication device other than the communication device and transmit them to the processor, or to transmit signals from the processor to a communication device other than the communication device, wherein the processor implements the functional modules of the method in any possible implementation of any of the first to third aspects through logic circuits or by executing computer programs or instructions. Optionally, the communication device further comprises a memory configured to store the computer program or instructions.

[0041] In the seventh aspect, a computer-readable storage medium is provided, which stores a computer program or instruction. When the computer program or instruction is executed by a processor, the method in any possible implementation of any one of the first to third aspects is implemented.

[0042] In an eighth aspect, a computer program product storing instructions is provided, which, when read and executed by a computer, implements the method in any possible implementation of any one of the first to third aspects.

[0043] In a ninth aspect, a circuit is provided for executing the method in any possible implementation of any one of the first to third aspects, wherein the circuit may include a chip circuit. Optionally, the circuit may also be coupled to a memory.

[0044] In a tenth aspect, a chip is provided, comprising a processor. When the processor executes a computer program or instruction, the processor is configured to implement the method of any possible implementation of any of the first to third aspects. Optionally, the chip may further include a memory. The chip may be composed of a single chip or may include a chip and other discrete devices.

[0045] In the eleventh aspect, a communication device is provided, comprising a processor, which implements the method in any possible implementation of any one of the first to third aspects through a logic circuit or executing a computer program or instruction.

[0046] In a twelfth aspect, embodiments of the present application further provide a communication system. The communication system includes: a terminal device for implementing the method in the aforementioned first aspect and any possible implementation thereof; a network device for implementing the method in the aforementioned second aspect and any possible implementation thereof; and a first device for implementing the method in the aforementioned third aspect and any possible implementation thereof. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] FIG1 is a schematic diagram of an access network device architecture provided in an embodiment of the present application;

[0048] FIG2 is a schematic diagram of a network architecture applicable to an embodiment of the present application;

[0049] FIG3 is a schematic diagram of a network architecture provided in an embodiment of the present application;

[0050] FIG4 is a schematic diagram of a network architecture provided in an embodiment of the present application;

[0051] FIG5 is a schematic diagram of a charging node deployment according to an embodiment of the present application;

[0052] FIG6 is a schematic diagram of a receiver architecture provided in an embodiment of the present application;

[0053] FIG7 is a schematic diagram of a receiver architecture supporting a time switching architecture provided by an embodiment of the present application;

[0054] FIG8 is a schematic diagram of a receiver architecture supporting a frequency division architecture provided by an embodiment of the present application;

[0055] FIG9 is a schematic diagram of a receiver architecture supporting a power splitting architecture provided in an embodiment of the present application;

[0056] FIG10 is a flow chart of a communication method provided in an embodiment of the present application;

[0057] FIG11 is a flow chart of a communication method provided in an embodiment of the present application;

[0058] FIG12 is a flow chart of a communication method provided in an embodiment of the present application;

[0059] FIG13 is a schematic diagram of the structure of a communication device provided in an embodiment of the present application;

[0060] FIG14 is a schematic diagram of the structure of a communication device provided in an embodiment of the present application;

[0061] FIG15 is a schematic diagram of the structure of a communication device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0062] The technical solutions in the embodiments of the present application will be described below in conjunction with the drawings in the embodiments of the present application. Obviously, the embodiments described in the present application are only a part of the embodiments of the present application, not all of the embodiments. The terms "first", "second" and corresponding terminology labels in the present application are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the terms used in this way can be interchangeable under appropriate circumstances. This is merely a way of distinguishing objects with the same properties when describing them in the embodiments of the present application.

[0063] The method provided in the embodiment of the present application can be applied to various types of mobile communication systems, for example, the Internet of Things (IoT), narrowband Internet of Things (NB-IoT), the fourth generation (4G) communication system (such as long term evolution (LTE)), the fifth generation (5G) communication system (such as 5G new radio (NR)), the hybrid architecture of LTE and NR, 6G or new communication systems emerging in future communication development, etc. The communication system may also include a machine to machine (M2M) network, a machine type communication (MTC) or other networks. Exemplarily, the method provided in the embodiment of the present application can be applied to a communication system that supports Internet of Things or ambient Internet of Things (AIoT) technology.

[0064] The methods and devices provided in the embodiments of the present application are based on the same or similar technical concepts. Since the principles of solving problems by the methods and devices are similar, the implementation of the devices and methods can refer to each other, and the repeated parts will not be repeated.

[0065] Below, some terms used in the embodiments of the present application are first explained to facilitate understanding by those skilled in the art.

[0066] In the embodiments of the present application, a network device is a device in a wireless network. The network device may also be referred to as a network apparatus, 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. Network equipment includes but is not limited to: base stations, evolved NodeBs (eNodeBs), transmission reception points (TRPs), next generation NodeBs (gNBs) in fifth generation (5G) mobile communication systems, access network equipment in open radio access networks (O-RANs), next generation base stations in sixth generation (6G) mobile communication systems, base stations in future mobile communication systems, or access nodes in wireless fidelity (WiFi) systems, etc.; or it may be a module or unit that completes part of the functions of a base station, for example, a centralized unit (CU), a distributed unit (DU), a centralized unit control plane (CU-CP) module, or a centralized unit user plane (CU-UP) module. The access network equipment may be a macro base station, a micro base station, an indoor station, a relay node, a donor node, etc. The specific technology and specific device form adopted by the network equipment are not limited in this application.

[0067] As shown in Figure 1, in some implementations, network equipment may include a centralized unit (CU) and a distributed unit (DU). RAN equipment, including CU and DU nodes, splits the protocol layers of the gNB in ​​the NR system. Some protocol layer functions are centrally controlled by the CU, while some or all of the remaining protocol layer functions are distributed in the DU, which is then centrally controlled by the CU. Furthermore, the CU can be divided into a control plane (CU-CP) and a user plane (CU-UP). The CU-CP is responsible for control plane functions, primarily including radio resource control (RRC) and the control plane's corresponding packet data convergence protocol (PDCP) (i.e., PDCP-C). PDCP-C is primarily responsible for encryption, decryption, integrity protection, and data transmission of control plane data. The CU-UP is responsible for user plane functions, primarily including the service data adaptation protocol (SDAP) and the user plane's corresponding PDCP (i.e., PDCP-U). SDAP is primarily responsible for processing core network data and mapping flows to bearers. The PDCP-U is primarily responsible for data plane encryption and decryption, integrity protection, header compression, sequence number maintenance, and data transmission. The CU-CP and CU-UP are connected via the E1 interface. The CU-CP represents the gNB's connection to the core network via the NG interface and to the DU via the F1 interface control plane (i.e., F1-C). The CU-UP connects to the DU via the F1 interface user plane (i.e., F1-U). Alternatively, the PDCP-C may also reside in the CU-UP.

[0068] It is understood that in different systems, CU (including CU-CP or CU-UP) or DU may have different names, but those skilled in the art will understand their meanings. For example, in an open radio access network (O-RAN) system, CU may also be called O-CU (open CU), DU may also be called O-DU, CU-CP may also be called O-CU-CP, and CU-UP may also be called O-CU-UP. For convenience of description, this application uses CU, CU-CP, CU-UP, and DU as examples. 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, the media access control (MAC) layer, and the physical (PHY) layer. In some deployments, the CU can be further divided into a Centralized Unit Control Plane (CU-CP) node and a Centralized Unit User Plane (CU-UP) node, where the CU-CP is responsible for control plane functions and the CU-UP is responsible for user plane functions.

[0069] The terminal device involved in the embodiments of the present application may be a wireless terminal device capable of receiving network device scheduling and instruction information. The terminal device may be referred to as a terminal device, and may also be referred to as user equipment (UE), mobile station (MS), mobile terminal (MT), etc. The terminal device may be a device that includes wireless communication capabilities (providing voice / data connectivity to the user). For example, a handheld device with wireless connection capabilities, or an in-vehicle device, in-vehicle module, etc. Currently, some examples of terminal devices include: mobile phones, tablet computers, laptop computers, PDAs, mobile internet devices (MIDs), wearable devices, virtual reality (VR) devices, augmented reality (AR) devices, wireless terminals in industrial control, wireless terminals in the Internet of Vehicles, wireless terminals in self-driving, wireless terminals in remote medical surgery, wireless terminals in smart grids, wireless terminals in transportation safety, wireless terminals in smart cities, or wireless terminals in smart homes, device-to-device (D2D) communication terminal devices, vehicle-to-everything (V2X) communication terminal devices, smart vehicles, telematics boxes (T-boxes), machine-to-machine / machine-type communications (M2M / MTC) terminal devices, Internet of Things (IoT) The IoT (Internet of Things) terminal devices, etc. For example, the terminal device can be an onboard device, complete vehicle equipment, an onboard module, a vehicle, an onboard unit (OBU), a roadside unit (RSU), a T-box, a chip, or a system on chip (SOC), etc. The above chip or SOC can be installed in the vehicle, OBU, RSU, or T-box. Wireless terminals in industrial control can be cameras, robots, etc. Wireless terminals in smart homes can be TVs, air conditioners, vacuum cleaners, speakers, set-top boxes, etc.Terminal devices can also be V2X devices, such as smart cars (or intelligent cars), digital cars, unmanned cars (or driverless cars, or pilotless cars, or automobiles), self-driving cars (or autonomous cars), pure electric vehicles (or battery EVs), hybrid electric vehicles (HEVs), range-extended electric vehicles (REEVs), plug-in hybrid electric vehicles (PHEVs), new energy vehicles (new energy vehicles), and roadside units (RSUs). Terminal devices can also be devices used in device-to-device (D2D) communications, such as electricity meters and water meters.

[0070] In an embodiment of the present application, the terminal device may also be a tag in an AIoT or IoT system, or the terminal device may be a semi-active device or an active device.

[0071] A tag may also be referred to as an electronic tag or a radio frequency identification (RFID) tag or tag device. Alternatively, when this application is applied to a communication system that supports AIoT, the tag may also be referred to as an AIoT terminal device or an AIoT device or an AIoT apparatus. Alternatively, when this application is applied to a communication system that supports IoT, the tag may also be referred to as an IoT terminal device or an IoT device or an IoT apparatus. In this application, a tag can be used as a terminal device to communicate with a network device.

[0072] In one classification method, tags can be divided into passive tags, semi-passive tags, and active tags. Passive tags and semi-passive tags can use a backscatter-based communication method, while active tags use an actively generated carrier communication method.

[0073] Another classification method is to divide tags into the following three types of devices:

[0074] Device A, or passive device: has no energy storage, cannot generate signals independently, and uses backscattering to transmit signals;

[0075] Device B, or semi-active device: includes an energy storage device such as a battery. It stores energy but cannot independently generate signals. It transmits signals using backscatter, and its stored energy can amplify the reflected signal.

[0076] Device C, or active device: includes energy storage devices such as batteries, has energy storage, can independently generate signals, and has active RF components for transmission.

[0077] The tag in this application can be any of the three types of devices mentioned above.

[0078] FIG2 shows a schematic diagram of a communication system applicable to an embodiment of the present application.

[0079] As shown in Figure 2 , the communication system may include at least one network device, such as network device 110 and network device 111. The communication system may also include at least one terminal device, such as terminal devices 120 to 127. Terminal devices 120 to 127 may be mobile or fixed. Network device 110 and one or more of terminal devices 120 to 125 may communicate via wireless links. Network device 110, through network device 111, communicates with one or more of terminal devices 126 to 127 via wireless links. Each network device may provide communication coverage for a specific geographic area and may communicate with terminal devices within that coverage area. For example, a network device may send configuration information to a terminal device, and the terminal device may send uplink data to the network device based on the configuration information. Another example is that a network device may send downlink data to a terminal device. Therefore, network device 110, network device 111, and terminal devices 120 to 127 in the figure constitute a communication system. Furthermore, 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 wireless links. Furthermore, 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 wireless links.

[0080] It should be understood that FIG2 exemplarily illustrates a network device and multiple terminal devices, as well as the communication links between the communication devices. Optionally, the communication system may include multiple network devices, and each network device may include other numbers of terminal devices within its coverage area, such as more or fewer terminal devices. This application is not limited to this.

[0081] 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 shown in Figure 3, during the communication process between the network device and the tag, the energy stored in its own energy storage module can be used to complete the transmission of the wireless signal, or it can rely on obtaining energy from the radio frequency signal of the outside world (such as the network device) and communicate by backscattering the radio frequency signal. The tag can be an independent device, or it can be integrated with the terminal device, that is, the tag is part of the terminal device. In this communication system, the network device can have the function of a reader in a radio frequency identification (RFID) system, that is, the network device can communicate with the tag as a reader.

[0082] In another implementation, as shown in Figure 4, the tag cannot actively send radio frequency signals. The terminal device first transmits an excitation or carrier signal (which can carry downlink data). The tag modulates the carrier signal and sends the modulated signal to the terminal device or network device (which can carry uplink data).

[0083] Considering that semi-passive devices, such as AIoT devices, have poor battery life, they need to be charged with stable wireless radio frequency (RF) signals to provide sufficient energy to AIoT devices. Since the coverage distance of RF charging is much smaller than the coverage distance of communication signals, directly providing wireless charging services to AIoT devices in the cell through base stations is difficult to meet the basic charging needs of most AIoT devices.

[0084] In order to improve energy coverage, the present application proposes a new lightweight charging node (energy header, EH), the main function of which is RF charging, supplemented by communication; or the charging node only supports RF charging. For example, as shown in Figure 5, the RF charging range and signal coverage range of the base station are illustrated on the left, where the RF charging range is significantly smaller than the signal coverage range. If a device is outside the RF charging range but is within the signal coverage range, although the device can communicate with the base station, the base station cannot perform RF charging for it. To this end, as shown on the right side of the figure, by deploying multiple charging nodes within the cell range, each charging node has an RF charging range, which can perform RF charging for devices within its RF charging range, thereby achieving energy coverage within the entire cell range and meeting the charging needs of all devices in the cell (such as AIoT devices).

[0085] The charging node may be a device that existed before the present application, such as a terminal device, or a newly designed device, which is not limited in the present application. The transmission power of the charging node may be less than that of the base station.

[0086] The following first explains the relevant technical features involved in the embodiments of the present application. It should be noted that these explanations are intended to make the embodiments of the present application easier to understand and should not be regarded as limiting the scope of protection claimed by the present application.

[0087] Wireless energy transmission:

[0088] Wireless energy transmission can also be called wireless energy transmission or wireless charging or RF charging or wireless energy transmission (simultaneous wireless information and power transfer, SWIPT), and energy can refer to electrical energy or other forms of energy, without specific limitation. In the embodiment of the present application, wireless energy transmission is described as an example. Wireless energy transmission is a contactless power transmission method between different devices. For example, device 1 sends a radio frequency signal to device 2, and device 2 receives the radio frequency signal from device 1 and converts the radio frequency signal into electrical energy. Wireless energy transmission can serve a variety of devices, such as IoT devices with a power consumption of about 10 microwatts (uW), that is, these devices can be provided with electrical energy through wireless energy transmission.

[0089] For example, if a device, such as an IoT device, supports wireless charging, its receiver may be as shown in Figure 6. As shown in Figure 6, the receiver includes an antenna, a bandpass filter (BPF), an envelope detector, and a low-pass filter (BPF). After the RF signal passes through the antenna, BPF, envelope detector, and low-pass filter, it converts the RF energy into DC power and stores it in an energy storage module (such as a battery).

[0090] For a receiver supporting wireless energy transmission, its energy conversion efficiency = received RF signal energy / RF signal converted to DC energy × 100%. Due to energy loss during the conversion of RF signals to DC signals, receivers supporting wireless energy transmission have a sensitivity threshold. For example, if the sensitivity threshold is -30dBm, then if the received RF signal power of the receiver is less than -30dBm, the energy conversion efficiency is 0, meaning the receiver cannot obtain energy from the RF signal.

[0091] In wireless energy transmission, the radio frequency signal used to provide energy can carry information or not. If the radio frequency signal carries information, then wireless energy transmission can also be called SWIPT.

[0092] The SWIPT transmission method simultaneously decodes and harvests energy from the signal received by the receiving antenna. Because energy harvesting destroys the signal's information content, it's impossible to simultaneously decode and harvest energy from the same signal. Therefore, the signal must be separated and used for decoding and energy harvesting separately to achieve SWIPT transmission. Typical SWIPT structures include the following:

[0093] 1) Time switching (TS) architecture: different time slots or time units are allocated for energy collection and information decoding. For example, as shown in FIG7 , the RF signal received by the receiving end through the antenna passes through a band pass filter (BPF), and then is switched to channel 1 and channel 2 by the TS module in a time-sharing manner. Channel 1 may include an energy storage module. Channel 1 is an energy collection channel based on diode rectification, which converts the RF signal into energy and stores the energy; while channel 2 is used for information decoding to obtain the information carried in the RF signal. The specific structure of channel 1 and channel 2, and which modules they include, are not limited in this application.

[0094] 2) Frequency splitting (FS) architecture: Different frequency bands are allocated for energy collection and information decoding. Different channels are configured with filters of different frequency bands. For example, as shown in Figure 8, the RF signal received by the receiving end through the antenna passes through the BPFs of different channels to achieve signal segmentation. 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 structure of channel 1 and channel 2, and which modules they include, are not limited in this application.

[0095] 3) Power splitting (PS) architecture: The received signal is divided into two streams according to the power splitting factor for energy collection and information decoding. For example, as shown in Figure 9, after the RF signal received by the receiving end through the antenna passes through the BPF, it is diverted to channel 1 and channel 2 through the PS module. Channel 1 converts and stores the energy of the RF signal, 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 structure of channel 1 and channel 2, and which modules they include, are not limited in this application.

[0096] In this application, predefined content generally refers to information that is defined by standards and does not require additional device configuration. It is pre-recorded / written in the hardware and / or software of the terminal device itself, or it can be understood as not being modifiable by the network device or other terminal devices. Pre-configured content generally refers to information that is pre-recorded / written in the hardware and / or software of the terminal device itself, determined by the equipment manufacturer, and can be modified through software or hardware.

[0097] (Pre) configuration can be divided into network device (pre) configuration and terminal device (pre) configuration. If it is a network device (pre) configuration, it can be (pre) configured through a system information block (SIB) or RRC signaling; if it is a terminal device (pre) configuration, it can be (pre) configured according to PC5-RRC signaling.

[0098] The network architecture and business scenarios described in the embodiments of the present application are intended to more clearly illustrate the technical solutions of the embodiments of the present application, and do not constitute a limitation on the technical solutions provided in the embodiments of the present application. Ordinary technicians in this field will know that with the evolution of network architecture and the emergence of new business scenarios, the technical solutions provided in the embodiments of the present application are also applicable to similar technical problems.

[0099] Based on the description of the above-mentioned related technical features, the embodiment of the present application provides a solution for wireless charging of AIoT devices and other devices based on a charging node. The method provided in the embodiment of the present application is introduced in detail below.

[0100] It can be understood that the present application does not specifically limit the specific structure of the execution subject of the method provided in the embodiment of the present application. The method executed by the terminal device in the present application can be applied to the terminal device or a module in the terminal device, the method executed by the network device can be applied to the network device or a module in the network device, and the method executed by the first device can be applied to the first device or a module in the first device. As long as it is possible to communicate according to the method provided in the embodiment of the present application by running a program that records the code of the method provided in the embodiment of the present application, the interaction between the terminal device, the first device and the network device will be used as an example for explanation below, and other situations will not be repeated.

[0101] Among them, the first device may 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 transmits wireless energy (to the terminal device), or a device that wirelessly charges (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, or an energy relay device, etc.

[0102] Example 1:

[0103] In Example 1, the network device may instruct the first device (eg, a mobile phone or other device) to wirelessly charge the terminal device (eg, a tag or other device).

[0104] As shown in Figure 10, a flow chart of a communication method provided by an embodiment of the present application is provided. 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 a charging node. The names of the various signals, messages, or information in the method flow are just examples. The various signals, messages, or information in the method flow may also have other names, which will not be repeated here. The method includes:

[0105] Step 1001: A network device sends a probing signal, where the probing signal indicates reporting of second information.

[0106] Correspondingly, the terminal device receives the detection signal.

[0107] The name of the detection signal is just an example. The detection signal may also have other names, which will not be repeated here.

[0108] Step 1002: The terminal device sends second information.

[0109] The terminal device may send the second information directly to the network device, or may send the second information to the first device, which then forwards the second information to the network device. The specific name of the second information is not limited, and may be called an energy state indicator, for example.

[0110] In this application, the second information includes at least one of the following:

[0111] 1. Capability information, indicating whether the terminal device supports wireless energy transmission; if the terminal device does not support wireless energy transmission, then the first device is not instructed to send a signal for energy transmission to the terminal device; if the terminal device supports wireless energy transmission, then the first device is instructed to send a signal for energy transmission to the terminal device;

[0112] 2. Remaining energy value, indicating the current remaining energy of the terminal device; the remaining energy value can be the specific value of the current remaining energy of the terminal device, or it can be 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 length of time that the current remaining energy of the terminal device can support the operation of the terminal device; the network device or the first device can determine whether to prioritize wireless energy transmission for the terminal device based on the remaining energy value, or determine information such as the duration of sending a signal for wireless energy transmission to the terminal device; for example, if the remaining energy value is 5%, it means that the terminal device has only 5% energy, and the network device can prioritize scheduling signals for wireless energy transmission 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.

[0113] 3. Required energy value, indicating how much energy the terminal device needs to obtain; the network device or the first device may determine information such as the duration of sending a signal for wireless energy transmission to the terminal device based on the required energy value;

[0114] 4. Energy collection sensitivity threshold, which indicates the minimum signal receiving power required when the energy conversion efficiency of the terminal device is greater than or equal to 0. For example, if the energy collection sensitivity threshold is -30dBm, it means that the energy conversion efficiency of the terminal device is equal to 0. If the receiving power of the signal received by the terminal device is less than -30dBm, the energy conversion efficiency is 0, and the terminal device cannot obtain energy from the signal. If the receiving power of the signal received by the terminal device is greater than -30dBm, the energy conversion efficiency is greater than 0, and the terminal device can obtain energy from the signal. Accordingly, the network device or the first device can determine the transmission power of the signal sent to the terminal device for wireless energy transmission based on the energy collection sensitivity threshold.

[0115] 5. Expected signal received power. The expected signal received power can be a value or a received power range. For example, the expected signal received power indicates the minimum value of the signal received power expected by the terminal device. For example, the expected signal received power is [5dBm, 10dBm]. Accordingly, the network device or the first device can determine the transmit power of the signal for wireless energy transmission sent to the terminal device based on the expected signal received power. The expected signal received power can be greater than or equal to the energy harvesting sensitivity threshold.

[0116] 6. Received signal strength indicator (RSSI) or reference signal receiving power (RSRP) of the detection signal; the network device or the first device can determine at least one of the transmission power and duration of the signal for wireless energy transmission sent to the terminal device based on the RSSI or RSRP.

[0117] 7. Charging modes of supported wireless energy transmission; the charging modes include at least one of the normal mode, time switching architecture mode, frequency division architecture mode and power division architecture mode. The normal mode indicates that the terminal device cannot simultaneously decode information when converting the signal into energy, so that the network device or the first device does not carry information in the signal used for wireless energy transmission; the time switching architecture mode indicates that the terminal device supports the use of a time switching architecture for energy collection; the frequency division architecture mode indicates that the terminal device supports the use of a frequency division architecture for energy collection; the power division architecture mode indicates that the terminal device supports the use of a power division architecture for energy collection.

[0118] 8. Supported signal reception frequency bands or frequencies. The network device or the first device can determine, based on this information, which frequency bands or frequencies to use to send signals for wireless energy transmission.

[0119] 9. Number of supported channels; the number of channels includes energy collection channels and data transmission channels. For example, assuming 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, as well as frequency-shift keying (FSK) signal transmission. If the number of supported channels is greater than 1, then the terminal device has multiple energy collection channels, each of which may support a different frequency. If the number of supported channels is equal to 1, it is very likely that energy collection and data transmission are multiplexed on the same channel, indicating that the terminal device does not support time-switching architecture mode, frequency-splitting architecture mode, and power-splitting architecture mode.

[0120] 10. Matching circuit type. For example, matching circuit types include, but are not limited to, L-type matching networks, π-type matching networks, and T-type matching networks. The matching circuit type is related to the energy collection efficiency of the terminal device. The network device or the first device can determine at least one of the transmit power, frequency band, frequency point, and duration of the signal for wireless energy transmission based on the matching circuit type.

[0121] If the second information does not include any of the information, the information may be a default. For example, if the second information does not include capability information, the terminal device may be assumed to support wireless energy transmission. For example, if the second information does not include an energy harvesting sensitivity threshold, the energy harvesting sensitivity threshold may be a default value, such as -30 dBm. Examples of other information are not provided one by one.

[0122] If the terminal device does not send the second information, then each of the items described above is preset or pre-configured.

[0123] The above are just examples, and the second information may also include other content, which is not limited in this application.

[0124] Step 1003: The network device sends second indication information to the terminal device and the first device.

[0125] Correspondingly, the terminal device receives the second indication information, and the first device receives the second indication information.

[0126] The second indication information is used to configure the first signal, and the first signal is used to transmit 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.

[0127] 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, the first message instructs the terminal device to receive the first signal, and the first message includes the second indication information. After the terminal device receives the first message, it can receive the first signal according to the second indication information. For example, the network device sends a second message to the first device, 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 the first device receives the second message, it can send the first signal according to the second indication information. The first message or the second message can be an RRC message, a system message, or other types of messages, which are not limited by this application.

[0128] In the present application, the signal coverage range of the network device may include multiple first devices, and 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 the second indication information to the first device that is closest to the terminal device. Alternatively, the network device can send the second indication information to the first device with the best channel quality with the terminal device, where the channel quality can be measured in advance. This application does not limit how to determine the channel quality. For example, the channel quality improves the RSSI indication. The terminal device can measure the RSSI between it and multiple first devices and report the measured multiple RSSIs to the network device. The network device can send the second indication information to the first device corresponding to the largest RSSI.

[0129] In this application, the specific content of the second indication information is not limited. For example, the second indication information indicates at least one of the following:

[0130] 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; and the time-frequency resources where the first signal is located.

[0131] If the second indication information does not indicate any of the information, then the information is default, preset, or preconfigured, or is determined autonomously by the first device. For example, if the second indication information does not indicate the frequency band or frequency point of the first signal, then the frequency band or frequency point of the first signal is default, preset, or preconfigured, or is determined autonomously by the first device. If the second indication information does not indicate the transmit power of the first signal, then the transmit power of the first signal is default, preset, or preconfigured, or is determined autonomously by the first device.

[0132] This application does not limit how the network device determines the second indication information. For example, the network device can determine the frequency band or frequency point where the first signal is located, and the time-frequency resources 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 resources 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.

[0133] For example, the transmission period of the first signal and the transmission duration of the first signal can be determined based on at least one of the remaining energy value, the required energy value, and the 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 based on the first signal and can obtain the required energy in a timely manner. For example, there is a mapping relationship between the transmission period of the first signal and the transmission duration of the first signal and at least one of the remaining energy value, the required energy value, and the energy collection sensitivity threshold of the terminal device, and the network device can determine the transmission period of the first signal and the transmission duration of the first signal based on the above mapping relationship.

[0134] For example, the modulation mode and waveform of the first signal may be related to the number of supported channels. For example, if the terminal device only supports envelope detection and the number of data transmission channels is 1, the modulation mode of the first signal is OOK, and the waveform of the first signal may be an OOK waveform. If the number of data transmission channels is 2, the modulation mode of the first signal is OOK or FSK, and the waveform of the first signal may be an OOK waveform or an FSK waveform.

[0135] For example, the transmit power of the first signal may be determined by at least one of a matching circuit type of the terminal device, an expected signal receiving power, and an energy collection sensitivity threshold. For example, the transmit power of the first signal may be greater than the expected signal receiving power or the energy collection sensitivity threshold of the terminal device.

[0136] For example, the encoding method of the first signal may be related to the charging mode of wireless energy transmission supported by the terminal device.

[0137] The above are just examples. How the network device determines the frequency band or frequency point, transmission period, transmission duration and other information of the first signal is not limited to the above examples. There may be other situations, and this application does not limit this.

[0138] Step 1004: The first device sends a first signal.

[0139] Accordingly, the terminal device receives the first signal. The name of the first signal is not limited and may also be referred to as an energy signal. The first signal is used to provide energy to the terminal device. The first signal may also carry information. When the first signal carries information, the specific content of the information carried is not limited.

[0140] The first device may send the first signal according to the second indication information, for example, by sending the first signal in the frequency band or frequency point indicated by the second indication information, or by sending the first signal 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 encoding mode of the first signal may be the encoding 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 periodically sends the first signal, the transmission period of the first signal may be the transmission period indicated by the second indication information.

[0141] Accordingly, the terminal device may receive the first signal according to the second indication information. For example, the terminal device receives the first signal at the frequency band or frequency point indicated by the second indication information, or receives the first signal at the time-frequency resource indicated by the second indication information. Other situations are not described in detail.

[0142] This step is described using the example of a first device sending a first signal. In actual applications, a network device may also send a first signal. For example, if the network device determines that a terminal device is within the coverage range of its energy signal, the network device may send the first signal. An energy signal is a signal used to transmit energy, such as the first signal.

[0143] Step 1005: The terminal device converts the first signal into energy, which is used to charge the terminal device.

[0144] For example, the terminal device may include an energy storage module (such as a battery), and the terminal device may store energy in the energy storage module.

[0145] In this application, the specific method by which the terminal device converts the first signal into energy is not limited. For example, the terminal device's receiver includes modules such as a BPF, an envelope detector, and an LPF. The first signal received by the terminal device's receiver is sequentially processed by the BPF, the envelope detector, and the LPF, and then converted into a DC signal. The DC signal is then input into the energy storage module to store energy and charge the terminal device.

[0146] Step 1006: The terminal device sends first information to the network device or the first device.

[0147] If a terminal device sends first information to a first device, the first device may forward the first information to the network device. The resource used by the terminal device to send the first information may be preset or preconfigured, or may be configured by the network device. For example, the network device sends uplink resource indication information, where the uplink resource indication information indicates an uplink resource. The terminal device may use the uplink resource to send the first information.

[0148] In one implementation, if the terminal device obtains energy according to the first signal, the first information may indicate at least one of an energy storage status and charging success. The energy storage status may represent the amount of energy obtained by the terminal device according to 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, that is, whether to continue charging the terminal device, based on the first information.

[0149] Optionally, if charging of the terminal device is complete, for example, when the energy in the energy storage module of the terminal device reaches an upper capacity limit of the energy storage module, or when the energy in the energy storage module of the terminal device is greater than or equal to an energy threshold, the first information may further instruct to stop charging or stop sending the first signal. For example, an energy threshold of 95% indicates that the stored energy is 95% of the capacity of the energy storage module.

[0150] In one implementation, if the terminal device fails to obtain energy based on the first signal, for example, the received power of the first signal is less than the energy collection sensitivity threshold, resulting in the terminal device's energy conversion efficiency being zero, then the first information may indicate an energy transmission failure or failure to obtain energy through the first signal, or the first information may indicate a charging failure. In this case, the first information may also indicate an expected signal received power, so that the first device or the network device may adjust the transmit power of the first signal based on the first information, for example, adjusting the transmit power of the first signal to be greater than the expected signal received power, and the first device may resend the first signal.

[0151] Through the above process, the network device instructs the first device to send a first signal for energy transmission. This allows the terminal device to obtain energy through the first signal and store the obtained energy, thereby increasing the operating life of the terminal device and facilitating the satisfaction of the terminal device's energy collection requirements. The terminal device may also indicate the energy storage status through the first information, allowing the network device or the first device to determine whether the terminal device needs to continue charging.

[0152] Example 2:

[0153] In the present application, the first device may also actively initiate wireless energy transmission to the terminal device without receiving instruction information from the network device, which is described in detail below.

[0154] As shown in Figure 11, a flow chart of a communication method provided by an embodiment of the present application is provided. 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 a charging node. The names of the various signals, messages, or information in the method flow are just examples. The various signals, messages, or information in the method flow may also have other names, which will not be repeated here. The method includes:

[0155] Step 1101: A first device sends a first signal to a terminal device.

[0156] Correspondingly, the terminal device receives the first signal.

[0157] 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 autonomously determined by the first device:

[0158] 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 and 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; 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 resources where the first signal is located.

[0159] In this implementation, the first device can transmit the first signal in a preset or preconfigured frequency band or frequency point. The transmission period and transmission duration 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 transmit the first signal in the common energy transmission frequency band. Correspondingly, the terminal device can receive the first signal in the preset or preconfigured frequency band or frequency point.

[0160] In this implementation, the first device may use a maximum transmit power to transmit the first signal, or may use a transmit power greater than or equal to the energy collection sensitivity threshold of the terminal device to transmit the first signal, which is not limited in this application. Other parameters of the first signal may also be preset or preconfigured and will not be described in detail here.

[0161] Step 1102: The terminal device converts the first signal into energy, which is used to charge the terminal device.

[0162] This application does not limit how the terminal device converts the first signal into energy. For example, please refer to the description in step 1005.

[0163] Step 1103: The terminal device sends the first information to the first device.

[0164] The specific meaning of the first information will not be described in detail. For example, please refer to the description in step 1006. Step 1103 is an optional step, and the terminal device may not send the first information.

[0165] The resources used by the terminal device to send the first information may be preset or preconfigured.

[0166] After executing the above process, you can also execute the process shown in Figure 10, so that the terminal device can obtain more energy.

[0167] In the method, the various parameters of the first signal are preset or preconfigured, or determined autonomously by the first device, and the network device does not need to configure the various parameters of the first signal, which 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, thereby quickly obtaining 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 to interact with the network device, for example, it is impossible to report the second information. At this time, the first signal sent by the first device can charge the terminal device in time to ensure the normal operation of the terminal device, avoid the terminal device from being unable to access the network when the energy is exhausted, and solve the problem of restarting the terminal device after the energy is exhausted.

[0168] Example 3:

[0169] In the present application, the terminal device may also actively initiate wireless energy transmission and actively request the network device or the first device to send a signal for transmitting energy, which is described in detail below.

[0170] As shown in Figure 12, a flow chart of a communication method provided by an embodiment of the present application is provided. 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 a charging node. The names of the various signals, messages, or information in the method flow are just examples. The various signals, messages, or information in the method flow may also have other names, which will not be repeated here. The method includes:

[0171] Step 1200: The terminal device sends first indication information to the network device or the first device.

[0172] The first indication information requests 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, preconfigured, or configured by the network device. The first indication information may also be referred to as energy warning or energy request (Power request / Power warning) information, and this application does not limit the name of the first indication information.

[0173] The terminal device may send the first indication information when determining that the remaining energy value is less than or equal to a threshold. The threshold is preset or preconfigured. The threshold is an energy value or an energy ratio. For example, if the threshold is 10%, then the terminal device sends the first indication information if the ratio of the remaining energy of the energy storage module of the terminal device to the energy storage module capacity is less than or equal to 10%.

[0174] Optionally, when sending the first indication information, the terminal device may also send second information. The second information may refer to the description in step 1202.

[0175] In one implementation, the frequency resource carrying the first indication information is preset or preconfigured, which ensures that the terminal device can send the first indication information in a timely manner, avoids the terminal device being shut down due to low energy, and ensures effective transmission of services.

[0176] In one implementation, the terminal device may send a random access preamble, where 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 be determined that the energy of the terminal device is low and wireless energy transmission is required. This method is particularly suitable for terminal devices in the RRC idle state. In this way, during the random access process, the random access preamble can be used to indicate that the terminal device needs to be charged, thereby improving charging efficiency.

[0177] Step 1201: The network device sends a detection signal, where the detection signal indicates reporting of second information.

[0178] Correspondingly, the terminal device receives the detection signal.

[0179] Step 1202: The terminal device sends the second information.

[0180] Step 1203: The network device sends second indication information to the terminal device and the first device.

[0181] Correspondingly, the terminal device receives the second indication information, and the first device receives the second indication information.

[0182] Step 1204: The first device sends a first signal.

[0183] Correspondingly, the terminal device receives the first signal.

[0184] Step 1205: The terminal device converts the first signal into energy, which is used to charge the terminal device.

[0185] Step 1206: The terminal device sends the first information to the network device or the first device.

[0186] The specific process of steps 1201 to 1206 can refer to the description of steps 1001 to 1006, which will not be repeated here.

[0187] Through the above process, the terminal device can quickly obtain the first signal by actively instructing the network device to send a first signal for transmitting energy, thereby obtaining energy through the first signal, improving energy acquisition efficiency, and preventing the terminal device from running out of energy.

[0188] It is understandable that in order to implement the functions in the above embodiments, the terminal device or network device or first device includes hardware structures and / or software modules corresponding to the execution of each function. It should be readily apparent to those skilled in the art that, in combination with the units and method steps of each example described in the embodiments disclosed in this application, the present application can be implemented in the form of hardware or a combination of hardware and computer software. Whether a function is executed in hardware or in a manner driven by computer software depends on the specific application scenario and design constraints of the technical solution.

[0189] The following is a schematic diagram of the structure of possible communication devices provided in the embodiments of the present application. These communication devices can be used to implement the functions of the terminal device, network device, or first device in the above method embodiments, and thus can also achieve the beneficial effects of the above method embodiments.

[0190] As shown in Figure 13, 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, network device, or first device in the above-mentioned method embodiments.

[0191] In one implementation, the communication device 1300 is configured to implement the following functions:

[0192] a processing unit, configured to receive a first signal from a first device via a communication unit; wherein the first signal is used to transmit energy;

[0193] The communication unit is configured to convert the first signal into energy, where the energy is used to charge the terminal device;

[0194] The processing unit is configured 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 status and charging success.

[0195] In one 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:

[0196] 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.

[0197] In a possible implementation, before receiving the first signal from the first device, the processing unit is further configured to:

[0198] 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 through the communication unit; the first indication information requests a signal for transmitting energy.

[0199] In a possible implementation, the communication unit is further configured to:

[0200] Sending second information to the network device or the first device;

[0201] The second information includes at least one of the following:

[0202] Indicates whether wireless energy transmission is supported; the remaining energy value; the required energy value; the expected signal reception power; the RSSI or RSRP of the detection signal; the charging mode of supported wireless energy transmission; and the supported signal reception frequency band or frequency point.

[0203] In one implementation, the communication device 1300 is configured to implement the following functions:

[0204] a processing unit, configured to determine second indication information, wherein the second indication information is used to configure a first signal, wherein the first signal is used to transmit energy to a terminal device;

[0205] 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.

[0206] In one possible implementation, the second indication information indicates at least one of the following:

[0207] 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.

[0208] In a possible implementation, the communication unit is further configured to:

[0209] receiving second information from the terminal device;

[0210] The second information includes at least one of the following: whether wireless energy transmission is supported; remaining energy value; required energy value;

[0211] Expected signal receiving power; received signal strength indicator RSSI or reference signal received power RSRP of the detection signal; supported charging mode of wireless energy transmission; supported signal receiving frequency band or frequency point.

[0212] In a possible implementation manner, the second indication information is determined according to the second information.

[0213] In one implementation, the communication device 1300 is configured to implement the following functions:

[0214] a processing unit, configured to determine a first signal, wherein the first signal is used to transmit energy to a terminal device;

[0215] A communication unit is used 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 status and charging success of the terminal device.

[0216] In one possible implementation, at least one of the following parameters of the first signal is preset or preconfigured:

[0217] 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.

[0218] A more detailed description of the processing unit 1310 and the communication unit 1320 can be directly obtained by referring to the relevant descriptions in the above-mentioned method embodiments, and will not be repeated here.

[0219] It should be understood that the division of units in the above device is merely a division of logical functions. In actual implementation, they can be fully or partially integrated into one physical entity, or physically separated. Moreover, the units in the device can all be implemented in the form of software called through processing elements; or all be implemented in the form of hardware; or some units can be implemented in the form of software called through 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 it can be integrated into a certain chip of the device. In addition, it can also be stored in the form of a program in a memory, called by a certain processing element of the device and execute the function of the unit. In addition, all or part of these units can be integrated together, or they can be implemented independently. The processing element here 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 unit above can be implemented by the integrated logic circuit of the hardware in the processor element or by software called through the processing element.

[0220] In one example, the unit in any of the above devices may be one or more integrated circuits configured to implement the above method, such as one or more application specific integrated circuits (ASICs), one or more digital singnal processors (DSPs), one or more field programmable gate arrays (FPGAs), or a combination of at least two of these integrated circuit forms. For another example, when the unit 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-purpose central processing unit (CPU), or other processor that can call a program. For another example, these units can be integrated together and implemented in the form of a system-on-a-chip (SOC).

[0221] The above-mentioned receiving unit is an interface circuit of the device, which is used to receive signals from other devices. For example, when the device is implemented as a chip, the receiving unit is the interface circuit of the chip used to receive signals from other chips or devices. The above-mentioned sending unit is an interface circuit of the device, which is used to send signals to other devices. For example, when the device is implemented as a chip, the sending unit is the interface circuit of the chip used to send signals to other chips or devices.

[0222] As another possible product form, the terminal device or network device of the embodiment of the present application can be implemented by a general bus architecture. For ease of explanation, refer to Figure 14, which is a structural diagram of a communication device 1400 provided in an embodiment of the present application, and the communication device 1400 includes a processor 1401 and a transceiver 1402. The communication device 1400 can be a terminal device, or a chip or chip system therein; or, the communication device 1400 can be a network device, or a chip or module therein. Figure 14 only shows the main components of the communication device 1400. In addition to the processor 1401 and the transceiver 1402, the communication device 1400 can further include a memory 1403, and an input and output device (not shown in the figure).

[0223] Optionally, processor 1401 is primarily used to process communication protocols and communication data, as well as control the entire communication device, execute software programs, and process software program data. Memory 1403 is primarily used to store software programs and data. Transceiver 1402 may include a radio frequency circuit and an antenna. The radio frequency circuit is primarily used to convert baseband signals into radio frequency signals and process radio frequency signals. The antenna is primarily used to transmit and receive radio frequency signals in the form of electromagnetic waves. Input and output devices, such as a touch screen, display, and keyboard, are primarily used to receive user input and output data to the user.

[0224] Optionally, the processor 1401 , the transceiver 1402 , and the memory 1403 may be connected via a communication bus.

[0225] When the communication device is powered on, the processor 1401 can 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 sent wirelessly, the processor 1401 performs baseband processing on the data to be sent and outputs the 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 to the outside 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.

[0226] In another implementation, the RF circuit and antenna can be set independently of the processor performing baseband processing. For example, in a distributed scenario, the RF circuit and antenna can be arranged remotely from the communication device.

[0227] In some embodiments, in terms of hardware implementation, those skilled in the art may conceive that the above-mentioned communication device 1300 may take the form of the communication device 1400 shown in FIG. 14 .

[0228] As an example, the functions / implementation process of the processing unit 1310 in FIG13 may be implemented by the processor 1401 in the communication device 1400 shown in FIG14 calling computer-executable instructions stored in the memory 1403. The functions / implementation process of the communication unit 1320 in FIG13 may be implemented by the transceiver 1402 in the communication device 1400 shown in FIG14.

[0229] As another possible product form, the terminal device or network device in this application may adopt the structure shown in Figure 15, or include the components shown in Figure 15. Figure 15 is a schematic diagram of the structure of a communication device 1500 provided in this application.

[0230] As shown in FIG15 , a communication device 1500 includes at least one processor 1501. Optionally, the communication device further includes a communication interface 1502.

[0231] When the program instructions are executed in the at least one processor 1501, the apparatus 1500 can implement the method provided in any of the aforementioned embodiments and any possible designs thereof. Alternatively, the processor 1501 implements the method provided in any of the aforementioned embodiments and any possible designs thereof through logic circuits or by executing code instructions.

[0232] The communication interface 1502 may be used to receive program instructions and transmit them to the processor. Alternatively, the communication interface 1502 may be used for communication between the communication device 1500 and other communication devices, such as exchanging control signaling and / or service data. Exemplarily, the communication interface 1502 may be used to receive signals from devices other than the communication device 1500 and transmit them to the processor 1501, or to send signals from the processor 1501 to other communication devices other than the communication device 1500.

[0233] Optionally, the communication interface 1502 may be a code and / or data read / write interface circuit, or the communication interface 1502 may be a signal transmission interface circuit between a communication processor and a transceiver, or a pin of a chip.

[0234] Optionally, the communication device 1500 may further include at least one memory 1503, which may be used to store required program instructions and / or data. It should be noted that the memory 1503 may exist independently of the processor 1501 or may be integrated with the processor 1501. The memory 1503 may be located within the communication device 1500 or outside the communication device 1500, without limitation.

[0235] Optionally, the communication device 1500 may further include a power supply circuit 1504, which may be used to supply power to the processor 1501. The power supply circuit 1504 may be located in the same chip as the processor 1501, or in another chip other than the chip where the processor 1501 is located.

[0236] Optionally, the communication device 1500 may further include a bus, and various parts of the communication device 1500 may be interconnected via the bus.

[0237] In some embodiments, in terms of hardware implementation, those skilled in the art may conceive that the communication device 1300 shown in FIG. 13 may take the form of the communication device 1500 shown in FIG. 15 .

[0238] As an example, the functions / implementation process of the processing unit 1310 in FIG13 may be implemented by the processor 1501 in the communication device 1500 shown in FIG15 calling computer-executable instructions stored in the memory 1503. The functions / implementation process of the communication unit 1320 in FIG13 may be implemented by the communication interface 1502 in the communication device 1500 shown in FIG15.

[0239] It should be noted that the structure shown in FIG15 does not constitute a specific limitation on the terminal device, network device, or first device. For example, in other embodiments of the present application, the terminal device or network device may include more or fewer components than shown, or combine or split certain components, or arrange the components differently. The components shown in the figure may be implemented in hardware, software, or a combination of software and hardware.

[0240] When the communication device is a chip used in 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 antenna), and the 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 antenna), and the information is sent by the terminal to the base station.

[0241] When the above-mentioned communication device is a module applied to a base station, the base station module implements the functions of the base station in the above-mentioned method embodiment. The base station module receives information from other modules in the base station (such as a radio frequency module or an antenna), and the information is sent by the 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 the information is sent by the base station to the terminal. The base station module here can be the baseband chip of the base station, or it can be a DU or other module. The DU here can be a DU under the open radio access network (O-RAN) architecture.

[0242] It is understood that the processor in the embodiments of the present application may be a central processing unit (CPU), or may be other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field programmable gate arrays (FPGA), or other programmable logic devices, transistor logic devices, hardware components, or any combination thereof. The general-purpose processor may be a microprocessor or any conventional processor.

[0243] The method steps in the embodiments of the present application can be implemented by hardware or by a processor executing software instructions. The software instructions can be composed of corresponding software modules, and the software modules can be stored in a random access memory, a flash memory, a read-only memory, a programmable read-only memory, an erasable programmable read-only memory, an electrically erasable programmable read-only memory, a register, a hard disk, a mobile hard disk, a CD-ROM 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 an integral part 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 in a base station or a terminal as discrete components.

[0244] In the above embodiments, all or part of the embodiments may be implemented using software, hardware, firmware, or any combination thereof. When implemented using software, all or part of the embodiments may be implemented 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 performed in whole or in part. The computer may be a general-purpose computer, a special-purpose computer, a computer network, a network device, a user device, or other programmable device. The computer program or instructions may be stored in a computer-readable storage medium or transferred from one computer-readable storage medium to another. For example, the computer program or instructions may be transferred from one website, computer, server, or data center to another website, computer, server, or data center via wired or wireless means. The computer-readable storage medium may 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 may be a magnetic medium, such as a floppy disk, hard disk, or magnetic tape; an optical medium, such as a digital video disk; or a semiconductor medium, such as a solid-state drive. The computer-readable storage medium may be a volatile or nonvolatile storage medium, or may include both volatile and nonvolatile types of storage media.

[0245] In the various embodiments of the present application, unless otherwise specified or there is a logical conflict, the terms and / or descriptions between different embodiments are consistent and can be referenced by each other. The technical features in different embodiments can be combined to form new embodiments according to their inherent logical relationships.

[0246] Those skilled in the art will appreciate that the embodiments of the present application can be provided as methods, systems, or computer program products. Therefore, the present application can adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment in combination with software and hardware. Moreover, the present application can adopt the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to magnetic disk storage, optical storage, etc.) that contain computer-usable program code.

[0247] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the present application. It should be understood that each flow and / or box in the flow chart and / or block diagram, as well as the combination of the flow chart and / or box in the flow chart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device produce a device for implementing the functions specified in one or more flow charts and / or one or more boxes in the block diagram.

[0248] These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce a product including an instruction device that implements the functions specified in one or more processes in the flowchart and / or one or more boxes in the block diagram.

[0249] Obviously, those skilled in the art may make various changes and modifications to the present application without departing from the scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include these modifications and variations.

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, 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 transmission; 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 transmission; 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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