A communication method and device

Abstract

A communication method and device for improving the efficiency of wireless energy transmission. The terminal device of the present application receives a first reference signal sent by a first network device; the terminal device sends a second reference signal to a second network device, and the second reference signal is a reflected signal of the first reference signal; the first reference signal and / or the second reference signal are used to determine a radio frequency signal for collaborative energy transmission; the terminal device receives the radio frequency signal; and the terminal device collects energy based on the radio frequency signal. The terminal device receives the radio frequency signal for collaborative energy transmission by the first network device and the second network device, and the efficiency of wireless energy transmission to the terminal device can be improved by collaborative energy transmission by multiple network devices.

Description

Technical Field

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

[0002] With the continuous development of Internet of Things (IoT) technology, more and more IoT devices have brought great convenience to people's lives. Batteries can be installed in IoT devices to provide power to IoT devices, but the power stored in batteries is limited. If batteries are replaced regularly for a large number of IoT devices, it will consume a lot of manpower and time costs. Therefore, wireless energy transmission is currently introduced to provide power to IoT devices through wireless energy transmission.

[0003] Wireless energy transmission can also be called radio frequency energy transmission. The radio frequency energy transmission signal is sent to the receiver through radio. The receiver then converts the radio frequency energy transmission signal into direct current and stores it for subsequent communication with IoT devices. Currently, the commonly used wireless energy transmission method is to transmit energy to a terminal device through a base station. Since wireless energy transmission through a base station is long-distance energy transmission, the efficiency of single-station energy transmission is very low. Summary of the invention

[0004] The present application provides a communication method and device for improving the efficiency of wireless energy transmission.

[0005] In the first aspect, an embodiment of the present application provides a communication method, which can be executed by a terminal device or a module (such as a chip) applied to the terminal device. Taking the terminal device executing the method as an example, the method includes: the terminal device receives a first reference signal sent by a first network device; the terminal device sends a second reference signal to a second network device, and the second reference signal is a reflected signal of the first reference signal; the first reference signal and / or the second reference signal are used to determine a radio frequency signal for collaborative energy transmission; the terminal device receives the radio frequency signal; the terminal device collects energy according to the radio frequency signal.

[0006] Through the above method, the terminal device receives the radio frequency signal for cooperative energy transmission of the first network device and the second network device. Through the cooperative energy transmission of multiple network devices, the efficiency of wireless energy transmission to the terminal device can be improved. In addition, the signal for cooperative energy transmission of the first network device and the second network device can be determined based on the first reference signal sent by the first network device to the terminal device, and / or the second reference signal sent by the terminal device to the second network device. The cooperative energy transmission signal determined based on the first reference signal and / or the second reference signal can better cooperate with the terminal device to transmit energy, further improving the efficiency of wireless energy transmission.

[0007] In one possible design, the RF signal includes a first RF signal and a second RF signal; the waveform information of the first RF signal is the same as that of the second RF signal, or the difference in waveform information between the first RF signal and the second RF signal is less than a first threshold.

[0008] Through the above method, the collaborative energy transmission RF signal includes a first RF signal sent by a first network device and a second RF signal sent by a second network device, and the RF signal received by the terminal device is a signal obtained by superimposing the first RF signal and the second RF signal; when the waveform information of the first RF signal and the second RF signal are the same or the difference is small, the first RF signal and the second RF signal can be superimposed to obtain a larger peak after reaching the terminal device, thereby improving the efficiency of wireless energy transmission to the terminal device.

[0009] In one possible design, the transmit phase of the second reference signal is the sum of the receive phase of the first reference signal and a phase offset.

[0010] Through the above method, the second reference signal sent by the terminal device is a reflected signal of the first reference signal. The terminal device sends the second reference signal through transmission technology without generating a new signal, which can achieve the energy-saving effect of the terminal device and reduce the power consumption of the terminal device.

[0011] In one possible design, the terminal device receives first indication information, where the first indication information is used to indicate the phase bias; or the terminal device sends second indication information to the first network device and / or the second network device, where the second indication information is used to indicate the phase bias.

[0012] Through the above method, the terminal device can determine the phase offset in a variety of different ways, thereby improving the diversity of the ways in which the terminal device determines the phase offset.

[0013] In a second aspect, an embodiment of the present application provides a communication method, which can be executed by a second network device or a module (such as a chip) applied to the second network device. Taking the second network device executing the method as an example, the method includes: the second network device receives auxiliary information for collaborative energy transmission from the first network device; the second network device receives a second reference signal sent by a terminal device; the second network device determines a second radio frequency signal for collaborative energy transmission based on the second reference signal and the auxiliary information; the second network device sends the second radio frequency signal to the terminal device, and the second radio frequency signal is used for collaborative energy transmission.

[0014] Through the above method, the second network device and the first network device cooperate to transmit energy to the terminal device, and the efficiency of wireless energy transmission to the terminal device can be improved by using multiple network devices to cooperate to transmit energy. In addition, the signal for cooperative energy transmission by the second network device can be determined based on the second reference signal from the terminal device and the auxiliary information from the first network device. The radio frequency signal determined based on the second reference signal and the auxiliary information can better cooperate with the first network device to cooperate with the terminal device to further improve the efficiency of wireless energy transmission.

[0015] In one possible design, the second RF signal cooperates with the first RF signal sent by the first network device to the terminal device to transmit energy; the receiving phase of the first RF signal is the same as the receiving phase of the second RF signal, or the difference between the receiving phase of the first RF signal and the receiving phase of the second RF signal is less than a second threshold.

[0016] Through the above method, the collaborative energy transmission RF signal includes a first RF signal sent by a first network device and a second RF signal sent by a second network device, and the RF signal received by the terminal device is a signal obtained by superimposing the first RF signal and the second RF signal; when the receiving phases of the first RF signal and the second RF signal are the same or have a small difference, the first RF signal and the second RF signal can be superimposed to obtain a larger peak after reaching the terminal device, thereby improving the efficiency of wireless energy transmission to the terminal device.

[0017] In one possible design, the second network device determines a phase for sending the second RF signal at a first time based on the second reference signal and the auxiliary information.

[0018] Through the above method, the radio frequency signal determined by the second network device according to the second reference signal and the auxiliary information can better cooperate with the first network device to collaboratively transmit energy to the terminal device, further improving the efficiency of wireless energy transmission.

[0019] In one possible design, the second network device determines the phase for sending the second RF signal at the first time based on the received phase of the second reference signal, the phase offset, and the auxiliary information.

[0020] Through the above method, the RF signal determined by the second network device based on the receiving phase, phase offset and auxiliary information of the second reference signal can better cooperate with the first network device to collaboratively transmit energy to the terminal device, further improving the efficiency of wireless energy transmission.

[0021] In one possible design, the phase of the second RF signal sent at the first time is the difference between the received phase of the second reference signal and the phase offset.

[0022] Through the above method, the second network device reasonably determines the phase of sending the second radio frequency signal at the first time, which can achieve better collaborative energy transmission with the first network device and improve the efficiency of wireless energy transmission to the terminal device.

[0023] In one possible design, the second network device receives phase offset information.

[0024] Through the above method, the second network device can more reasonably determine the phase of sending the second radio frequency signal at the first time according to the received phase offset information.

[0025] In one possible design, the phase of the second RF signal sent at the first time is the receiving phase of the second reference signal.

[0026] Through the above method, the second network device reasonably determines the phase of sending the second radio frequency signal at the first time, which can achieve better collaborative energy transmission with the first network device and improve the efficiency of wireless energy transmission to the terminal device.

[0027] In one possible design, the auxiliary information includes a sending time of a first TA and / or a first reference signal between the terminal device and the first network device.

[0028] Through the above method, the second network device can better cooperate with the first network device according to the sending time of the first TA and / or the first reference signal included in the auxiliary information to achieve coordinated energy transmission to the terminal device.

[0029] In one possible design, the second reference signal is a reflected signal of the first reference signal.

[0030] Through the above method, the second reference signal sent by the terminal device is a reflected signal of the first reference signal. The terminal device sends the second reference signal through transmission technology without generating a new signal, which can achieve the energy-saving effect of the terminal device and reduce the power consumption of the terminal device.

[0031] In one possible design, the difference between the first time and the second time is equal to the difference between the second TA and the first TA; or, the difference between the first time and the second time and the difference between the second TA and the first TA is less than a third threshold; wherein the second TA is the TA between the terminal device and the second network device, and the second time is the sending time of the first RF signal.

[0032] Through the above method, the second network device can reasonably determine the time to send the second RF signal, so that the receiving phases of the first RF signal and the second RF signal received by the terminal device at the same time are the same, thereby improving the efficiency of wireless energy transmission to the terminal device.

[0033] In one possible design, the second network device determines the second TA based on the reception time of the second reference signal, the first TA, the transmission time of the first reference signal, and the time difference between the reception time of the first reference signal and the transmission time of the second reference signal.

[0034] Through the above method, the second network device can accurately determine the timing advance between the terminal device and the second network device, thereby reasonably determining the time to send the second radio frequency signal.

[0035] In one possible design, the auxiliary information includes receiving resource configuration information of the second network device, and the receiving resource configuration information is used to receive the second reference signal.

[0036] Through the above method, the auxiliary information received by the network device from the first network device includes the receiving resource configuration information, so that the resources sent by the terminal device can be accurately received, for example, the second reference signal from the terminal device can be accurately received.

[0037] In a third aspect, an embodiment of the present application provides a communication method, which can be executed by a first network device or a module (such as a chip) applied to the first network device. Taking the first network device executing the method as an example, the method includes: the first network device sends a first reference signal to a terminal device; the first network device determines a first radio frequency signal for collaborative energy transmission based on the first reference signal; the first network device sends the first radio frequency signal to the terminal device, and the first radio frequency signal is used for collaborative energy transmission.

[0038] Through the above method, the first network device and the second network device cooperate to transmit energy to the terminal device, and the efficiency of wireless energy transmission to the terminal device can be improved by using multiple network devices to cooperate to transmit energy. In addition, the signal for cooperative energy transmission by the first network device can be determined based on the first reference signal sent to the terminal device, and the radio frequency signal determined based on the first reference signal can better cooperate with the second network device to cooperate with the terminal device to further improve the efficiency of wireless energy transmission.

[0039] In one possible design, the first RF signal and the second RF signal sent by the second network device to the terminal device cooperate to transmit energy; the receiving phase of the first RF signal is the same as the receiving phase of the second RF signal, or the difference between the receiving phase of the first RF signal and the receiving phase of the second RF signal is less than a second threshold.

[0040] Through the above method, the collaborative energy transmission RF signal includes a first RF signal sent by a first network device and a second RF signal sent by a second network device, and the RF signal received by the terminal device is a signal obtained by superimposing the first RF signal and the second RF signal; when the receiving phases of the first RF signal and the second RF signal are the same or have a small difference, the first RF signal and the second RF signal can be superimposed to obtain a larger peak after reaching the terminal device, thereby improving the efficiency of wireless energy transmission to the terminal device.

[0041] In one possible design, the first network device determines a phase for sending the first RF signal at a second time based on the first reference signal.

[0042] Through the above method, the radio frequency signal determined by the first network device according to the first reference signal can better cooperate with the second network device to collaboratively transmit energy to the terminal device, thereby further improving the efficiency of wireless energy transmission.

[0043] In one possible design, the phase of the first RF signal sent at the second time is the sending phase of the first reference signal.

[0044] Through the above method, the first network device reasonably determines the phase of sending the first radio frequency signal at the second time, which can achieve better coordinated energy transmission with the second network device and improve the efficiency of wireless energy transmission to the terminal device.

[0045] In one possible design, the phase of the first RF signal sent at the second time is the receiving phase of a second reference signal, and the second reference signal is a reflected signal of the first reference signal.

[0046] Through the above method, the first network device reasonably determines the phase of sending the first radio frequency signal at the second time, which can achieve better coordinated energy transmission with the second network device and improve the efficiency of wireless energy transmission to the terminal device.

[0047] In one possible design, the difference between the second time and the first time is equal to the difference between the first timing advance TA and the second TA; or, the difference between the second time and the first time and the difference between the first TA and the second TA is less than a third threshold; wherein, the first TA is the TA between the terminal device and the first network device, the second TA is the TA between the terminal device and the second network device, and the first time is the sending time of the second RF signal.

[0048] Through the above method, the first network device can reasonably determine the time to send the first RF signal, so that the receiving phase of the first RF signal and the second RF signal received by the terminal device at the same time is the same, thereby improving the efficiency of wireless power transmission to the terminal device.

[0049] In one possible design, the first network device sends phase offset information to the terminal device and / or the second network device, where the phase offset information is used to determine the phase for sending the second radio frequency signal.

[0050] Through the above method, the first network device indicates the phase bias information to the terminal device and / or the second network device, so that the second network device can more reasonably determine the phase of the first RF signal sent at the second time based on the received phase bias information, and the terminal device can send the second reference signal based on the received phase bias information.

[0051] In one possible design, the first network device sends auxiliary information for collaborative power transmission to the second network device.

[0052] Through the above method, the first network device provides auxiliary information to the second network device, and the second network device can better cooperate with the first network device based on the auxiliary information to jointly transmit energy to the terminal device, thereby further improving the efficiency of wireless energy transmission.

[0053] In one possible design, the auxiliary information includes at least one of the following: a first TA between the terminal device and the first network device, a sending time of the first reference signal, and receiving resource configuration information of the second network device, wherein the receiving resource configuration information is used to receive a second reference signal.

[0054] Through the above method, the first network device sends auxiliary information to the second network device. The second network device can better cooperate with the first network device according to the first TA, the sending time of the first reference signal and the receiving resource configuration information included in the auxiliary information to achieve collaborative energy transmission to the terminal device.

[0055] In a fourth aspect, the present application further provides a communication device, which has the function of implementing the method in the first aspect or any possible design thereof. The communication device can be implemented by hardware, or can be implemented by hardware executing corresponding software. The hardware or software includes one or more units or modules corresponding to the above functions.

[0056] In one possible design, the communication device includes: a processor, which is configured to support the communication device to perform the corresponding functions of the terminal in the method shown above. The communication device may also include a memory (or storage medium), which may be coupled to the processor and stores the necessary program instructions and data for the communication device. Optionally, the communication device also includes an interface circuit, which is used to support communication between the communication device and a network device or other device. The interface circuit may also be a transceiver, and the transceiver may include a transmitter and a receiver, and the transmitter and the receiver may be different devices, or may be the same device but can implement different functions.

[0057] In one possible design, the communication device includes corresponding functional modules, which are respectively used to implement 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.

[0058] In one possible design, the structure of the communication device includes a processing unit (or processing module) and a communication unit (or communication module), which can perform the corresponding functions in the above method example. For details, please refer to the description of the method provided in the first aspect, which will not be repeated here. The communication unit (or communication module) can also be a transceiver unit (or transceiver module), and the transceiver unit can include a sending unit and a receiving unit. The sending unit and the receiving unit can be different units, or they can be the same unit but can implement different functions.

[0059] The communication device may be a terminal or a chip or chip system in a terminal. If the communication device is a terminal, the transceiver may be a radio frequency transceiver component in the terminal. If the communication device is a chip or a chip system provided in a terminal, the transceiver may be a communication interface in the chip or the chip system, and the communication interface is connected to the radio frequency transceiver component in the terminal to realize information transmission and reception through the radio frequency transceiver component.

[0060] In a fifth aspect, the present application further provides a communication device, which has the function of implementing the method in the second aspect or any possible design thereof, or the communication device has the function of implementing the method in the third aspect or any possible design thereof. The communication device can be implemented by hardware, or can be implemented by hardware executing corresponding software. The hardware or software includes one or more units or modules corresponding to the above functions.

[0061] In one possible design, the communication device includes: a processor, which is configured to support the communication device to perform the corresponding functions of the network device in the method shown above. The communication device may also include a memory (or storage medium), which may be coupled to the processor and stores the necessary program instructions and data for the communication device. Optionally, the communication device also includes an interface circuit, which is used to support communication between the communication device and a device such as a terminal. The interface circuit may also be a transceiver, and the transceiver may include a transmitter and a receiver. The transmitter and the receiver may be different devices, or may be the same device but capable of implementing different functions.

[0062] In one possible design, the communication device includes corresponding functional modules, which are respectively used to implement 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.

[0063] In one possible design, the structure of the communication device includes a processing unit (or processing module) and a communication unit (or communication module), which can perform the corresponding functions in the above method examples. For details, please refer to the description of the method provided in the second aspect or the third aspect, which will not be repeated here. The communication unit (or communication module) can also be a transceiver unit (or transceiver module), and the transceiver unit can include a sending unit and a receiving unit. The sending unit and the receiving unit can be different units, or they can be the same unit but can implement different functions.

[0064] The communication device may be a network device or a chip or chip system in the network device. If the communication device is a network device, the transceiver may be a radio frequency transceiver component in the network device. If the communication device is a chip or chip system provided in the network device, the transceiver may be a communication interface in the chip or chip system, and the communication interface is connected to the radio frequency transceiver component in the network device to realize information transmission and reception through the radio frequency transceiver component.

[0065] In a sixth 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, it implements the method in the aforementioned first aspect or any possible design thereof, or implements the method in the aforementioned second aspect or any possible design thereof, or implements the method in the aforementioned third aspect or any possible design thereof.

[0066] In the seventh aspect, a computer program product storing instructions is provided, which, when executed by a processor, implements the method of the aforementioned first aspect or any possible design thereof, or implements the method of the aforementioned second aspect or any possible design thereof, or implements the method of the aforementioned third aspect or any possible design thereof.

[0067] In an eighth aspect, a communication device is provided, the communication device comprising a processor, the processor being used to implement the method in the aforementioned first aspect or any possible design thereof, or to implement the method in the aforementioned second aspect or any possible design thereof, or to implement the method in the aforementioned third aspect or any possible design thereof. In addition, the communication device may also include a storage medium, the storage medium storing instructions, which, when executed by the processor, are used to implement the method in the aforementioned first aspect or any possible design thereof, or to implement the method in the aforementioned second aspect or any possible design thereof, or to implement the method in the aforementioned third aspect or any possible design thereof. The communication device may be a chip or a chip system. The chip system may be composed of chips, or may include chips and other discrete devices.

[0068] In a ninth aspect, a communication system is provided, which includes the terminal device described in the first aspect, the second network device described in the second aspect, and the first network device described in the third aspect.

[0069] For each of the above-mentioned aspects 4 to 9 and the technical effects that may be achieved by each of the aspects, please refer to the above-mentioned description of the technical effects that can be achieved by the first aspect or the various possible schemes in the first aspect, or the above-mentioned second aspect or the various possible schemes in the second aspect, or the above-mentioned third aspect or the various possible schemes in the third aspect, and no repetition will be given here. BRIEF DESCRIPTION OF THE DRAWINGS

[0070] Figure 1 A schematic diagram of the architecture of a communication system provided in an embodiment of the present application;

[0071] Figure 2 A schematic diagram of wireless power transmission provided in an embodiment of the present application;

[0072] Figure 3 A schematic diagram of a system architecture for multi-station energy transmission provided in an embodiment of the present application;

[0073] Figure 4 A flow chart of a communication method provided in an embodiment of the present application;

[0074] Figure 5 A waveform diagram of a first reference signal provided in an embodiment of the present application;

[0075] Figure 6 A schematic diagram of a waveform of a second reference signal provided in an embodiment of the present application;

[0076] Figure 7 A flow chart of a communication method provided in an embodiment of the present application;

[0077] Figure 8 A schematic diagram of the relationship between signals provided in the embodiment of the present application;

[0078] Fig. 9 A flow chart of a communication method provided in an embodiment of the present application;

[0079] Fig.10 A schematic diagram of the relationship between signals provided in the embodiment of the present application;

[0080] Fig.11 A schematic diagram of multi-station collaborative energy transmission provided in an embodiment of the present application;

[0081] Fig.12 A signal superposition effect diagram provided in an embodiment of the present application;

[0082] Fig.13 A schematic diagram of the structure of a communication device provided in an embodiment of the present application;

[0083] Fig.14 A schematic diagram of the structure of a communication device provided in an embodiment of the present application;

[0084] Fig.15 A schematic diagram of the structure of a communication device provided in an embodiment of the present application;

[0085] Fig.16 A schematic diagram of the structure of a communication device provided in an embodiment of the present application;

[0086] Fig.17 A schematic diagram of the structure of a communication device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0087] 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.

[0088] Figure 1 Schematic diagram of the architecture of the communication system used in the embodiment of the present application. Figure 1 As shown, the communication system 1000 includes a wireless access network 100 and a core network 200. Optionally, the communication system 1000 may also include the Internet 300. The wireless access network 100 may include at least one network device (including a wireless access network device), such as Figure 1 110a and 110b in the embodiment may further include at least one terminal device, such as Figure 1 120a-120j in the figure. 110a is a base station, 110b is a micro station, 120a, 120e, 120f and 120j are mobile phones, 120b is a car, 120c is a gas station, 120d is a home access point (HAP) arranged indoors or outdoors, 120g is a laptop computer, 120h is a printer, and 120i is a drone.

[0089] Figure 1 In the present invention, the terminal device can be connected to the wireless access network device, and the wireless access network device can be connected to the core network device in the core network. The core network device and the wireless access network device can be independent and different physical devices, or the functions of the core network device and the logical functions of the wireless access network device can be integrated on the same physical device, or the functions of some core network devices and some wireless access network devices can be integrated on one physical device. Terminal devices and wireless access network devices can be connected to each other by wire or wireless. Figure 1 This is just a schematic diagram. The communication system may also include other devices, such as wireless relay devices and wireless backhaul devices. Figure 1 Not drawn in.

[0090] The following is an introduction to network devices and terminal devices.

[0091] (1) Network equipment

[0092] The network equipment includes wireless access network equipment, which may be a base station, an evolved NodeB (eNodeB), a transmission reception point (TRP), a next generation NodeB (gNB) in a fifth generation (5G) mobile communication system, a base station in a sixth generation (6G) mobile communication system, a base station in a future mobile communication system, or an access node in a wireless fidelity (WiFi) system; the network equipment may be a macro base station (such as a Figure 1 110a), or a micro base station or an indoor station (such as Figure 1 110b), may also be a relay node or a donor node, etc. In some possible network structures, the network device may include one or more centralized units (CU) and one or more distributed units (DU), and multiple DUs may be centrally controlled by one CU. This architecture may be called a CU-DU separation architecture.

[0093] The embodiments of the present application do not limit the specific technology and specific device form adopted by the network device. In the embodiments of the present application, the device for realizing the function of the access device may be a network device; it may also be a device that can support the network device to realize the function, such as a chip system, which can be installed in the network device. Among them, the chip system may be composed of a chip, or may include a chip and other discrete devices. In the embodiments of the present application, the functions of the network device may also be realized by multiple network function entities, each of which is used to realize part of the functions of the network device. These network function entities may be network elements in hardware devices, or they may be software functions running on dedicated hardware, or virtualization functions instantiated on a platform (such as a cloud platform). In the technical solution provided in the embodiments of the present application, the technical solution provided in the embodiments of the present application is described by taking the device for realizing the function of the network device as a network device as an example.

[0094] (2) Terminal equipment

[0095] Terminal devices can also be called terminals, user equipment (UE), mobile stations, mobile terminals, etc. Terminal devices can be widely used in various scenarios, such as device-to-device (D2D), vehicle to everything (V2X) communication, machine-type communication (MTC), Internet of Things, virtual reality, augmented reality, industrial control, autonomous driving, telemedicine, smart grid, smart furniture, smart office, smart wearable, smart transportation, smart city, etc. Terminal devices can be mobile phones, tablet computers, computers with wireless transceiver functions, wearable devices, vehicles, drones, helicopters, airplanes, ships, robots, robotic arms, smart home devices, etc.

[0096] The embodiments of the present application do not limit the specific technology and specific device form used by the terminal device. In the embodiments of the present application, the device for realizing the function of the terminal device can be a terminal device; it can also be a device that can support the terminal device to realize the function, such as a chip system, which can be installed in the terminal device. In the technical solution provided in the embodiments of the present application, the technical solution provided in the embodiments of the present application is described by taking the device for realizing the function of the terminal device as an example that the terminal device is used.

[0097] In addition, the same terminal device or network device can provide different functions in different application scenarios. For example, Figure 1The mobile phones in the embodiment include 120a, 120e, 120f and 120j. Among them, the mobile phone 120a can access the base station 110a, connect to the car 120b, communicate directly with the mobile phone 120e and access the HAP; the mobile phone 120e can access the HAP and communicate directly with the mobile phone 120a; the mobile phone 120f can access the micro station 110b, connect to the laptop computer 120g, and connect to the printer 120h; the mobile phone 120j can control the drone 120i.

[0098] The roles of network devices and terminal devices can be relative. For example, Figure 1 The helicopter or drone 120i in the figure can be configured as a mobile base station. For the terminal devices 120j that access the wireless access network 100 through 120i, the terminal device 120i is a base station; but for the base station 110a, 120i is a terminal device, that is, 110a and 120i communicate through the wireless air interface protocol. Of course, 110a and 120i can also communicate through the interface protocol between base stations. In this case, relative to 110a, 120i is also a base station. Therefore, the wireless access network and the terminal device can be collectively referred to as a communication device. Figure 1 110a and 110b in the figure may be referred to as communication devices having base station functions. Figure 1 120a-120j in the figure can be called communication devices with terminal equipment functions.

[0099] The network equipment and terminal equipment can be fixed or movable. The network equipment and terminal equipment can be deployed on land, including indoors or outdoors, handheld or vehicle-mounted; they can also be deployed on the water surface; they can also be deployed on aircraft, balloons and artificial satellites in the air. The embodiments of the present application do not limit the application scenarios of the network equipment and terminal equipment.

[0100] Network devices and terminal devices, network devices and network devices, and terminal devices and terminal devices may communicate through authorized spectrum, unauthorized spectrum, or both; may communicate through spectrum below 6 gigahertz (GHz), spectrum above 6 GHz, or spectrum below 6 GHz and spectrum above 6 GHz. The embodiments of the present application do not limit the spectrum resources used for wireless communication.

[0101] Above Figure 1 The illustrated communication system may support various radio access technologies (RATs), such as Figure 1The communication system illustrated may be a fourth generation (4G) communication system (also referred to as a long term evolution (LTE) communication system), a 5G communication system (also referred to as a new radio (NR) communication system), or a future-oriented evolution system, such as a 6G communication system. The communication system and business scenario 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. A person of ordinary skill in the art will appreciate that, with the evolution of the communication system 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.

[0102] The following first explains the relevant terms 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.

[0103] 1. Wireless energy transmission:

[0104] Wireless energy transmission can also be called wireless energy transmission, 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 wireless power transmission as an example. Wireless power transmission is a contactless power transmission method between different devices. For example, device 1 converts a DC signal into a low-energy radio frequency signal, and then performs power amplification processing on the low-energy radio frequency signal to obtain a high-energy radio frequency signal, and sends the high-energy radio frequency signal to device 2. After device 2 receives the radio frequency signal from device 1, it converts the radio frequency signal into a DC signal, which carries DC power. Since the receiver of wireless power transmission is simple and flexible in mobility and deployment, wireless power transmission can serve a variety of devices, such as Internet of Things devices with a power consumption of about 10 microwatts (uW), that is, these devices can be provided with power through wireless power transmission.

[0105] Figure 2 The figure is a schematic diagram of wireless power transmission between different devices. The device for providing power can be called a transmitter device, and the device for collecting power can be called a receiver device. The transmitter device can be a wireless device that supports sending radio frequency signals, such as a network device; the receiver device can be a wireless device equipped with an energy collection circuit, such as a terminal. The energy collection circuit includes, for example, a rectifier and a power management circuit. Figure 2As shown, the network equipment may include a direct current (DC) power supply module, a DC-to-RF conversion module, a beamforming network and transmitting antennas module; the receiver may include a receiving antennas module, a rectifier, a power management circuit and a DC load.

[0106] From the perspective of network equipment, the DC power module of the network equipment inputs the DC signal to the DC-to-RF conversion module, and the DC-to-RF conversion module converts the DC signal into an RF signal, which is then transmitted through the beamforming network and the transmitting antenna module.

[0107] From the perspective of the terminal, after the receiving antenna module of the terminal receives the RF signal, the RF signal is converted into DC power through a rectifier and the DC power is transferred to the power management circuit. The power management circuit can use capacitors or batteries to store DC power and provide power to the DC load (such as the power module in the terminal) when needed.

[0108] 2. Waveform of RF signal:

[0109] The waveform of the RF signal can be divided into many types, such as continuous waveform, multi-sine waveform or other types of waveforms. In the embodiments of the present application, continuous waveform and multi-sine waveform will be described as examples. Among them, the continuous waveform can refer to a cosine waveform; the multi-sine waveform is similar to a pulse, which is obtained by superimposing multiple cosine waveforms of different frequencies, and conforms to the following formula:

[0110]

[0111] Where x(t) represents a multi-sine waveform, N represents the number of superimposed cosine waveforms, and w k represents the frequency of the kth cosine waveform, A k represents the amplitude of the kth cosine waveform, t represents time, θ k Represents the initial phase of the kth cosine waveform.

[0112] Further, different waveforms belonging to the same type can be further distinguished by specific waveform parameters; that is, when the waveform parameters of two waveforms are the same, the two waveforms are the same waveform; when the waveform parameters of the two waveforms are different, the two waveforms are different waveforms. For example, the waveform parameters of a continuous waveform may include frequency (or the identifier of the subcarrier carrying the continuous waveform). For another example, the waveform parameters of a multi-sine waveform may include the number of superimposed cosine waveforms and the frequency of each cosine waveform in the superimposed multiple cosine waveforms. For another example, the waveform parameters of a multi-sine waveform may include the number of superimposed cosine waveforms, the identifier of the first subcarrier and the subcarrier spacing; wherein the subcarrier used to carry multiple cosine waveforms may be a continuous plurality of subcarriers, and the first subcarrier may be the subcarrier with the lowest frequency or the subcarrier with the highest frequency. In addition, since the waveform parameters in the embodiment of the present application may not include the initial phase and amplitude of the waveform, when the waveform parameters of the two waveforms are the same, but the initial phase and / or amplitude are different, the two waveforms can be considered to be the same waveform in the embodiment of the present application.

[0113] In the embodiments of the present application, "at least one" refers to one or more, and "plurality" refers to two or more. "And / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone, where A and B can be singular or plural. The character " / " generally indicates that the previous and next associated objects are in an "or" relationship. "At least one of the following" or similar expressions refers to any combination of these items, including any combination of single or plural items. For example, at least one of a, b or c can represent: a, b, c, a and b, a and c, b and c, or a, b and c, where each of a, b, c can be an element itself, or a set containing one or more elements.

[0114] In this application, "exemplary", "in some embodiments", "in other embodiments", etc. are used to indicate examples, illustrations, or descriptions. Any embodiment or design described as "exemplary" in this application should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Rather, the use of the word "exemplary" is intended to present concepts in a concrete way.

[0115] In this application, "of", "corresponding", and "corresponding" can sometimes be used interchangeably. It should be noted that when the distinction is not emphasized, the meanings they express are consistent. In the embodiments of this application, communication and transmission can sometimes be used interchangeably. It should be noted that when the distinction is not emphasized, the meanings they express are consistent. For example, transmission can include sending and / or receiving, which can be a noun or a verb.

[0116] In this application, "indication" may include direct indication, indirect indication, explicit indication, and implicit indication. When describing that a certain indication information is used to indicate A, it can be understood that the indication information carries A, directly indicates A, or indirectly indicates A.

[0117] It should be pointed out that the words "first", "second", etc. involved in the embodiments of the present application are only used for the purpose of distinguishing the description, and cannot be understood as indicating or implying relative importance, nor can they be understood as indicating or implying an order.

[0118] Based on the problem of low efficiency of single-station energy transmission, the embodiment of the present application provides a solution based on multiple network devices to coordinate energy transmission to terminal devices. Figure 3 The schematic diagram of the system architecture of multi-station energy transmission shown in FIG. 1 includes at least two network devices 300 ( Figure 3 In the example, the first network device 300a and the second network device 300b are included and at least one terminal device 301 is provided. The first network device 300a can be a master station in the collaborative energy transmission system, the second network device 300b can be an auxiliary station in the collaborative energy transmission system, and the number of the second network devices 300b can be one or more; the master station in the collaborative energy transmission system can send auxiliary information of collaborative energy transmission to one or more auxiliary stations, so that the master station and each auxiliary station in the collaborative energy transmission system can cooperate to transmit energy to the terminal device 301.

[0119] For the convenience of description, the following introduction takes the collaborative transmission of energy from the first network device and the second network device to the terminal device as an example.

[0120] The embodiment of the present application does not limit the number of the first network device and the second network device.

[0121] An embodiment of the present application provides a communication method that can be used for collaborative energy transmission of multiple network devices.

[0122] like Figure 4 As shown, the method may include the following steps:

[0123] Step 400: The first network device sends a first reference signal to the terminal device; correspondingly, the terminal device receives the first reference signal sent by the first network device.

[0124] Exemplarily, the first network device periodically sends the first reference information to the terminal device.

[0125] Optionally, the first reference signal is a narrowband signal; (for example, the bandwidth of the first reference signal is a small bandwidth, such as the bandwidth of the first reference signal is less than a physical resource block (PRB)), and the waveform of the first reference signal can be the waveform of the RF signal introduced above.

[0126] Step 401: The terminal device sends a second reference signal to a second network device.

[0127] Correspondingly, the second network device receives the second reference signal from the terminal device.

[0128] The first reference signal is an incident signal, and the second reference signal is a reflected signal of the first reference signal. A possible implementation is that after receiving the first reference signal, the terminal device reflects the first reference signal; for example, by adjusting the antenna impedance to reflect a reflected signal of a corresponding phase.

[0129] Optionally, the second reference signal is a narrowband signal (for example, the bandwidth of the second reference signal is a small bandwidth, such as the bandwidth of the second reference signal is less than a physical resource block (PRB)), and the waveform of the second reference signal can be the waveform of the RF signal introduced above.

[0130] In the embodiment of the present application, since the second reference signal is a reflected signal of the first reference signal, there is a correlation between the second reference signal and the first reference signal. Exemplarily, there is a phase offset between the transmission phase of the second reference signal and the reception phase of the first reference signal; wherein the phase offset can be understood as the phase deviation between the reception phase of the incident signal of the terminal device and the transmission phase of the reflected signal.

[0131] The transmission phase of the signal in the embodiments of the present application is understood to be the phase corresponding to the signal transmitted by the device at a certain transmission moment; correspondingly, the reception phase is the phase corresponding to the signal received by the device at the reception moment.

[0132] like Figure 5 For example, if the terminal device receives the first reference signal at time T1, the receiving phase of the first reference signal is 180 degrees. Figure 6 The waveform of the second reference signal shown, for example, the terminal device sends the second reference signal at time T2, and the transmission phase of the second reference signal is 0 degree.

[0133] (1) The terminal device determines the transmission phase of the second reference signal.

[0134] Optionally, after receiving the first reference signal, the terminal device determines the sending phase of the second reference signal based on the receiving phase and phase offset of the first reference signal.

[0135] Exemplarily, the transmission phase of the second reference signal is equal to the sum of the reception phase of the first reference signal and the phase offset.

[0136] For example, phase2=phase1+phase offset; wherein phase2 is the sending phase of the second reference signal, phase1 is the receiving phase of the first reference signal, and phase offset is the phase bias.

[0137] The phase offset is obtained by adjusting the antenna impedance when the terminal device reflects the first reference signal.

[0138] The embodiments of the present application provide a variety of different ways to determine the phase offset. The terminal device can determine the phase offset according to any of the following methods, which are illustrated below with examples.

[0139] Phase offset determination method 1: network device indication.

[0140] Specifically, the terminal device receives first indication information from the first network device, and the first indication information is used to determine the phase offset.

[0141] The first network device may determine the phase offset in a variety of different ways.

[0142] For example, the terminal device has multiple candidate phase offsets, the first network device selects one from the multiple candidate phase offsets, and sends the selected phase offset to the terminal device through the first indication information.

[0143] For another example, the first network device determines the phase offset by measurement. The first network device sends a measurement signal to the terminal device, and receives a reflected signal corresponding to the measurement signal; the phase offset is determined by a first timing advance (TA), a transmission phase of the measurement signal, and a reception phase of the reflected signal corresponding to the measurement signal. Optionally, the measurement signal and the first reference signal are signals of the same type, for example, the measurement signal and the first reference signal have the same waveform type (for example, the measurement signal and the first reference signal are cosine signals), wherein the first timing advance is used by the terminal device to determine the sending time of data, and the data is sent to the first network device.

[0144] In this phase offset determination method, after determining the phase offset, the first network device indicates the phase offset to the second network device.

[0145] Phase offset determination method 2: The terminal device determines it by itself.

[0146] Specifically, the terminal device has multiple candidate phase offsets, and the terminal device determines a phase offset from the multiple candidate phase offsets.

[0147] Optionally, the terminal device sends second indication information to the first network device and / or the second network device, where the second indication information is used to indicate the phase bias, wherein the phase bias is a phase bias selected by the terminal device.

[0148] In one example, the terminal device receives a reporting indication from the first network device, and the terminal device sends the second indication information to the first network device according to the reporting indication. Optionally, the first network device sends the phase offset to the second network device.

[0149] (2) The terminal device determines the sending time of the second reference signal.

[0150] Optionally, the terminal device determines the sending time of the second reference signal based on the receiving time of the first reference signal.

[0151] Exemplarily, the difference between the transmission time of the second reference signal and the reception time of the first reference signal is 0 or the duration of a symbol (symbol duration). For example, if the reception time of the first reference signal is T1 and the transmission time of the second reference signal is T2, then T2-T1 is 0 or symbol duration. The value of T2-T1 is pre-set, such as pre-set based on a protocol agreement; or the terminal device indicates the value of T2-T1 to the first network device, and the first network device notifies the second network device of the value of T2-T1 (for example, the value of T2-T1 is carried in the auxiliary information).

[0152] The terminal device determines the sending time and sending phase of the second reference signal according to the above method, and sends the second reference signal to the second network device.

[0153] Optionally, the terminal device sends a second reference signal to the first network device. The sending time and the sending phase of the second reference signal sent by the terminal device to the first network device and the second network device may be the same.

[0154] Step 402: The terminal device receives a first radio frequency signal from a first network device, and receives a second radio frequency signal from a second network device.

[0155] It should be understood that in step 402, the terminal device receives a superimposed signal of the first radio frequency signal and the second radio frequency signal.

[0156] Correspondingly, the first network device sends a first radio frequency signal to the terminal device; and the second network device sends a second radio frequency signal to the terminal device.

[0157] Optionally, waveform information of the first RF signal is the same as that of the second RF signal, or a difference in waveform information between the first RF signal and the second RF signal is less than a first threshold.

[0158] The waveform information includes, but is not limited to, the waveform type of the RF signal, the receiving phase of the terminal device at the same time, and the subcarrier carrying the RF signal.

[0159] Exemplarily: the first RF signal and the second RF signal have the same waveform type, which means that the first RF signal and the second RF signal are signals of the same waveform; for example, the first RF signal and the second RF signal are both cosine signals.

[0160] The receiving phases of the terminal devices at the same time are the same, which is understood as, for the same time, the phase of the first RF signal received by the terminal device is the same as the phase of the second RF signal received by the terminal device; or, the receiving phase difference of the terminal devices at the same time is less than a second threshold, which is understood as, for the same time, the difference between the phase of the first RF signal received by the terminal device and the phase of the second RF signal received by the first terminal device is less than the second threshold.

[0161] The subcarrier carrying the first radio frequency signal is the same as the subcarrier carrying the second radio frequency signal.

[0162] In the case where the waveform types of the first RF signal and the second RF signal are the same, and the phase of the first RF signal received by the terminal device is the same as the phase of the second RF signal received by the terminal device or the difference is less than the first threshold, when the first RF signal and the second RF signal include multiple peaks, the peak of the first RF signal and the peak of the second RF signal arrive at the terminal device at the same time, or the time difference between the peak of the first RF signal and the peak of the second RF signal arriving at the terminal device is small. In this way, when the first RF signal and the second RF signal arrive at the terminal device, the first RF signal and the second RF signal can be superimposed to obtain a larger peak.

[0163] Step 403: The terminal device collects energy according to the first radio frequency signal and the second radio frequency signal.

[0164] It should be understood that in step 403, the terminal device superimposes the signal and collects energy.

[0165] The process of energy collection by the terminal device includes: the terminal device converts the first RF signal and the second RF signal (i.e., the superimposed signal) into DC power, stores the converted DC power, and provides the power to the load (such as the power module in the terminal device) when needed.

[0166] Exemplarily, the terminal device is equipped with an energy harvesting circuit, wherein the energy harvesting circuit includes a rectifier and a power management circuit. After the receiving antenna module of the terminal device receives the RF signal, the RF signal is converted into DC power through the rectifier, and the DC power is transferred to the power management circuit. The power management circuit uses a capacitor or a battery to store the DC power and provides the power to the load when needed.

[0167] Optionally, the terminal device collects energy according to the first RF signal and the second RF signal, which is understood as the terminal device collecting the energy of the peaks of the first RF signal and the second RF signal or collecting the energy of the peaks of the superimposed signal of the first RF signal and the second RF signal. In this way, when the first RF signal and the second RF signal received by the terminal device are superimposed to obtain a larger peak, the efficiency of energy collection by the terminal device can be improved.

[0168] On the first network device and the second network device side, the first network device determines the transmission phase of the first RF signal, and the second network device determines the transmission phase of the second RF signal, so that the waveform information of the first RF signal and the second RF signal received by the terminal device are the same, or the difference in waveform information between the first RF signal and the second RF signal is less than a first threshold, thereby improving energy transmission efficiency.

[0169] The following describes the manners in which the first network device determines the transmission phase of the first radio frequency signal and the manner in which the second network device determines the transmission phase of the second radio frequency signal.

[0170] 1. The first network device determines a transmission phase of the first radio frequency signal.

[0171] Optionally, the first network device determines a first radio frequency signal for collaborative energy transmission based on the first reference signal.

[0172] The first network device determines, based on the first reference signal, a phase for sending the first radio frequency signal at the second time.

[0173] For the convenience of description below, the phase in which the first network device sends the first radio frequency signal at the second time is referred to as the first phase.

[0174] In the embodiment of the present application, the first network device determines the first phase by any of the following methods.

[0175] Mode 1: The first phase is: the sending phase of the first reference signal at the third time.

[0176] The third time is the time when the first network device sends the first reference signal.

[0177] Exemplarily, the time difference between the second time and the third time is an integer multiple of a time slot.

[0178] In mode 1, the first network device determines a phase for sending the first reference signal at the third time, and uses the transmission phase of the first reference signal at the third time as the first phase.

[0179] Mode 2: The first phase is: the receiving phase of the second reference signal at the fourth time.

[0180] The fourth time is the time when the first network device receives the second reference signal. The receiving phase of the second reference signal at the fourth time is understood to be the phase when the first network device receives the second reference signal at the fourth time.

[0181] In mode 2, the terminal device sends the second reference signal to the first network device and the second network device simultaneously. The receiving phase of the second reference signal at the fourth time can be understood as the phase of the first network device receiving the second reference signal at the fourth time.

[0182] Accordingly, the first network device determines to receive the phase of the second reference signal at the fourth time, and sets the phase of the second reference signal received at the fourth time to the first phase.

[0183] 2. The second network device determines a transmission phase of the second radio frequency signal.

[0184] Optionally, the second network device receives auxiliary information from the first network device; wherein the auxiliary information can be used for collaborative energy transmission between the first network device and the second network device.

[0185] In one example, before step 400 , the first network device sends auxiliary information to the second network device.

[0186] In yet another example, the first network device periodically sends auxiliary information to the second network device.

[0187] Optionally, the auxiliary information includes at least one of the following information:

[0188] 1. First timing advance (TA);

[0189] The first TA is the timing advance of the terminal device sending a signal or data to the first network device. The timing advance compensates for the propagation delay between the terminal device and the first network device so that the time when the signals or data of different terminal devices arrive at the network device is aligned to avoid inter-symbol interference.

[0190] The second network device determines the second TA according to the first TA included in the auxiliary information; wherein the second TA is the timing advance between the terminal device and the second network device, which is understood as the timing advance for the terminal device to send a signal or data to the second network device. In addition, the second network device determines the phase of sending the second radio frequency signal at the first time according to the first TA and the second TA.

[0191] The specific manner in which the second network device determines the second TA according to the first TA and the specific manner in which the phase of sending the second radio frequency signal at the first time is determined are described in detail below.

[0192] 2. The sending time of the first reference signal.

[0193] The sending time of the first reference signal is the time when the first network device sends the first reference signal.

[0194] The second network device determines the second TA according to the sending time of the first reference signal included in the auxiliary information; in addition, the second network device determines the phase of sending the second radio frequency signal at the first time according to the second TA.

[0195] The specific manner in which the second network device determines the second TA according to the sending time of the first reference signal and the specific manner in which the phase of sending the second RF signal at the first time is determined are described in detail below.

[0196] 3. The second network device receives resource configuration information.

[0197] The receiving resource configuration information includes resources for receiving the second reference signal.

[0198] After receiving the first reference signal from the first network device, the terminal device sends a second reference signal to the second network device, where the second reference signal is a reflected signal of the first reference signal. The first network device carries the receiving resource configuration information of the second network device in the auxiliary information, and the second network device receives the second reference signal on the corresponding resource according to the receiving resource configuration information, so that the second network device determines the second radio frequency signal based on the second reference signal.

[0199] Optionally, the second network device determines a second radio frequency signal based on the second reference signal and the auxiliary information; wherein the second radio frequency signal and the first radio frequency signal transmit energy collaboratively.

[0200] The second network device determines, according to the second reference signal and the auxiliary information, a phase for sending the second radio frequency signal at the first time.

[0201] Exemplarily, the time difference between the first time and the third time is an integer multiple of a time slot. The third time is the time when the first network device sends the first reference signal.

[0202] For the convenience of description below, the phase in which the second network device sends the second radio frequency signal at the first time is referred to as the second phase.

[0203] In the embodiment of the present application, the second network device determines the second phase by any of the following methods.

[0204] Mode 1: The second phase is: the difference between the received phase of the second reference signal at the fifth time and the phase offset.

[0205] The fifth time is the time when the second network device receives the second reference signal.

[0206] In mode 1, the second network device determines the second phase according to the received phase of the second reference signal at the fifth time, the phase offset, and the auxiliary information.

[0207] Optionally, the second network device determines a first time to send a second radio frequency signal according to the auxiliary information; and determines a second phase according to a received phase and a phase offset of a second reference signal.

[0208] After receiving the second reference signal, the second network device uses the difference between the received phase of the second reference signal at the fifth time and the phase offset as the second phase according to the received phase of the second reference signal at the fifth time.

[0209] The manner in which the second network device determines the phase offset can be found in the above description and will not be repeated here.

[0210] Mode 2: The second phase is: the receiving phase of the second reference signal at the fifth time.

[0211] The fifth time is the time when the second network device receives the second reference signal. The receiving phase of the second reference signal at the fifth time is understood to be the phase when the second network device receives the second reference signal at the fifth time.

[0212] Accordingly, the second network device determines the phase of receiving the second reference signal at the fifth time, and uses the phase of receiving the second reference signal at the fifth time as the second phase.

[0213] It should be noted that, in order to improve energy transmission efficiency, the above-mentioned method for the first network device to determine the first phase and the method for the second network device to determine the second phase can be implemented in coordination.

[0214] In one example, when the first network device determines the first phase by way 1, the second network device determines the second phase by way 1. A specific implementation of the coordination may be: the first phase is the sending phase of the first reference signal at the third time, and the second phase is the difference between the receiving phase of the second reference signal at the fifth time and the phase offset.

[0215] In another example, when the first network device determines the first phase by way of mode 2, the second network device determines the second phase by way of mode 2. A specific implementation of the coordination may be: the first phase is a reception phase of the second reference signal at a fourth time (wherein the reception phase of the second reference signal at the fourth time is a phase when the first network device receives the second reference signal at the fourth time), and the second phase is a reception phase of the second reference signal at a fifth time (wherein the reception phase of the second reference signal at the fifth time is a phase when the second network device receives the second reference signal at the fifth time).

[0216] In the embodiment of the present application, the second time when the first network device sends the first radio frequency signal and the first time when the second network device sends the second radio frequency signal may satisfy one of the following conditions:

[0217] Condition 1: The difference between the second time and the first time is equal to the difference between the first TA and the second TA.

[0218] Condition 2: The difference between the second time and the first time and the difference between the first TA and the second TA is less than the third threshold.

[0219] When one of the above conditions is met between the second time when the first network device sends the first RF signal and the first time when the second network device sends the second RF signal, combined with the phase of the first network device sending the first RF signal at the second time and the phase of the second network device sending the second RF signal at the first time, the phase of the first RF signal received by the terminal device is the same as or has a small difference with the phase of the second RF signal received, and the peak of the first RF signal and the peak of the second RF signal arrive at the terminal device at the same time, or the time difference between the peak of the first RF signal and the peak of the second RF signal arriving at the terminal device is small. In this way, when the first RF signal and the second RF signal arrive at the terminal device, they can be superimposed to obtain a larger peak, thereby improving the efficiency of energy collection by the terminal device.

[0220] Exemplarily, the first network device determines the second time to send the first radio frequency signal according to the sending time of the first reference signal; for example, the first reference signal and the first radio frequency signal are sent periodically, and the first network device sends the first radio frequency signal at the second time after the signal sending period arrives. The second network device determines the second time to send the first radio frequency signal according to the sending time of the first reference signal carried in the auxiliary information and the signal sending period, and then determines the first time to send the second radio frequency signal according to the above conditions.

[0221] For example, the second time when the first network device sends the first radio frequency signal is T4, and the first time when the second network device sends the second radio frequency signal is T5, then T5-T4=TA 1 -TA 2 ; Among them, TA 1 For the first TA, TA 2 For the second TA.

[0222] Optionally, the second network device determines the second TA according to the following method:

[0223] The second network device determines the second TA according to the reception time of the second reference signal, the first TA, the transmission time of the first reference signal, and the time difference between the reception time of the first reference signal and the transmission time of the second reference signal.

[0224] Exemplarily, the second network device determines the second TA according to the following formula:

[0225] TA 2 =2*(T3-T0)-TA 1 -2*(T2-T1);

[0226] Among them, TA 1 For the first TA, TA 2 is the second TA, T3 is the time when the second network device receives the second reference signal, T0 is the time when the first network device sends the first reference signal, T2 is the time when the first network device sends the second reference signal, and T1 is the time when the first network device receives the first reference signal; T2-T1 is 0 or the duration of a symbol.

[0227] The following is an introduction to the communication method process of the embodiments of the present application in conjunction with several specific embodiments.

[0228] Embodiment 1:

[0229] like Figure 7 As shown, Figure 7 Only one second network device is shown, such as Figure 7The communication method flow shown may include multiple second network devices. For the sake of clarity, the relationship between the timing and phase of each signal in the communication method flow is as follows: Figure 8 shown.

[0230] The communication method process may include the following steps:

[0231] Step 700: The first network device sends auxiliary information to the second network device.

[0232] Among them, step 700 may be a periodic sending step.

[0233] The auxiliary information includes at least one of the following information: a first TA, a sending time of the first reference signal (represented as T0 in this embodiment), and receiving resource configuration information of the second network device, where the receiving resource configuration information is used to receive the second reference signal.

[0234] Step 701: A first network device sends a first reference signal to a terminal device.

[0235] The sending time of the first reference signal is recorded as T0, and the sending phase of the first reference signal is recorded as phase0.

[0236] Correspondingly, the terminal device receives the first reference signal.

[0237] The time when the terminal device receives the first reference signal is recorded as T1, and the receiving phase of the first reference signal is recorded as phase1.

[0238] It should be noted that the phase offset between phase 1 and phase 0 is a deviation caused by the first reference signal passing through a signal transmission path between the first network device and the terminal device.

[0239] Step 702: The terminal device sends a second reference signal to the second network device.

[0240] The second reference signal is a reflection signal of the first reference signal.

[0241] The sending time of the second reference signal is recorded as T2, and the sending phase of the second reference signal is recorded as phase2.

[0242] Optionally, T2-T1 is 0 or a symbol duration (symbol duration). Phase2=phase1+phase offset, where phase offset is a phase offset. The manner in which the terminal device determines the phase offset can refer to the above description.

[0243] Correspondingly, the second network device receives the second reference signal.

[0244] The time when the second network device receives the second reference signal is recorded as T3, and the receiving phase of the second reference signal (the phase when the second network device receives the second reference signal) is recorded as phase3.

[0245] It should be noted that the phase deviation between phase 3 and phase 2 is a deviation caused by the second reference signal passing through the signal transmission path between the terminal device and the second network device.

[0246] Step 703: The first network device sends a first radio frequency signal to the terminal device.

[0247] The first network device sends a first radio frequency signal at time T4, and the sending phase of the first radio frequency signal may be phase0.

[0248] Step 704: The second network device sends a second radio frequency signal to the terminal device.

[0249] The second network device sends a second radio frequency signal at time T5, and the sending phase of the second radio frequency signal may be phase3-phase offset. The manner in which the second network device determines the phase offset may refer to the above description.

[0250] Among them, T5-T4=TA 1 -TA 2 ; Among them, TA 1 For the first TA, TA 2 For the second TA;

[0251] TA 2 =2*(T3-T0)-TA 1 -2*(T2-T1).

[0252] Correspondingly, the terminal device receives the first radio frequency signal and the second radio frequency signal.

[0253] It should be noted that Figure 8 The timing between the various signals shown is only for reference and does not represent an absolute order; for example, T5 and T4 are Figure 8 The order in the above can be adjusted according to the actual situation. After the above design, the terminal device receives the first radio frequency signal and the second radio frequency signal at the same phase (the receiving phase is phase 1).

[0254] Embodiment 2:

[0255] like Fig. 9 As shown, Fig. 9 Only one second network device is shown, such as Fig. 9The communication method flow shown may include multiple second network devices. For the sake of clarity, the relationship between the timing and phase of each signal in the communication method flow is as follows: Fig.10 shown.

[0256] The communication method process may include the following steps:

[0257] Step 900: The first network device sends auxiliary information to the second network device.

[0258] Among them, step 900 may be a periodic sending step.

[0259] The auxiliary information includes at least one of the following information: a first TA, a sending time of the first reference signal (represented as T0 in this embodiment), and receiving resource configuration information of the second network device, where the receiving resource configuration information is used to receive the second reference signal.

[0260] Step 901: A first network device sends a first reference signal to a terminal device.

[0261] The sending time of the first reference signal is recorded as T0, and the sending phase of the first reference signal is recorded as phase0.

[0262] Correspondingly, the terminal device receives the first reference signal.

[0263] The time when the terminal device receives the first reference signal is recorded as T1, and the receiving phase of the first reference signal is recorded as phase1.

[0264] It should be noted that the phase deviation between phase 1 and phase 0 is a deviation caused by the first reference signal passing through a signal transmission path between the first network device and the terminal device.

[0265] Step 902: The terminal device sends a second reference signal to the first network device and the second network device.

[0266] The second reference signal is a reflection signal of the first reference signal.

[0267] The sending time of the second reference signal is recorded as T2, and the sending phase of the second reference signal is recorded as phase2.

[0268] Optionally, T2-T1 is 0 or a symbol duration (symbol duration). Phase2=phase1+phase offset, where phase offset is a phase offset. The manner in which the terminal device determines the phase offset can refer to the above description.

[0269] Correspondingly, the first network device receives the second reference signal. The time when the first network device receives the second reference signal is recorded as T3a, and the receiving phase of the second reference signal (the phase when the first network device receives the second reference signal) is recorded as phase3a.

[0270] It should be noted that the phase deviation between phase3a and phase2 is a deviation caused by the second reference signal passing through the signal transmission path between the terminal device and the first network device.

[0271] The second network device receives the second reference signal.

[0272] The time when the second network device receives the second reference signal is recorded as T3b, and the receiving phase of the second reference signal (the phase when the second network device receives the second reference signal) is recorded as phase3b.

[0273] It should be noted that the phase deviation between phase3b and phase2 is a deviation caused by the second reference signal passing through the signal transmission path between the terminal device and the second network device.

[0274] Step 903: The first network device sends a first radio frequency signal to the terminal device.

[0275] The first network device sends a first radio frequency signal at time T4, and the sending phase of the first radio frequency signal may be phase3a.

[0276] Step 904: The second network device sends a second radio frequency signal to the terminal device.

[0277] The second network device sends a second radio frequency signal at time T5, and the sending phase of the second radio frequency signal may be phase3b. The manner in which the second network device determines the phase offset may refer to the above description.

[0278] Among them, T5-T4=TA 1 -TA 2 ; Among them, TA 1 For the first TA, TA 2 For the second TA;

[0279] TA 2 =2*(T3-T0)-TA 1 -2*(T2-T1).

[0280] Correspondingly, the terminal device receives the first radio frequency signal and the second radio frequency signal.

[0281] It should be noted that Fig.10 The timing between the various signals shown is only for reference and does not represent an absolute sequence; for example, T3a and T3b are Figure 8 The order in can be adjusted according to the actual situation. T5 and T4 are in Figure 8 The order in the above can be adjusted according to the actual situation. After the above design, the terminal device receives the first radio frequency signal and the second radio frequency signal at the same phase (the receiving phase is phase2=phase1+phase offset).

[0282] like Fig.11 The schematic diagram of multi-station cooperative energy transmission shown in FIG. includes a terminal device and multiple network devices ( Fig.11 Four network devices are shown, but the number of network devices in the system architecture of multi-station coordinated energy transmission can be less than or more than 4). Network device 1, network device 2, network device 3, and network device 4 can coordinate to transmit energy to the terminal device. Based on the communication method provided in the embodiment of the present application, the RF signals sent by network device 1, network device 2, network device 3, and network device 4 arrive at the terminal device with the same phase (or a small phase difference), so that the peaks of multiple RF signals arrive at the terminal device at the same time (or approximately at the same time). Fig.12 As shown, after the RF signals sent by multiple network devices reach the terminal device, the RF signal formed after superposition at the terminal device has a higher peak, so that the terminal device can collect more energy and improve the energy transmission efficiency.

[0283] It is to be understood that in the above embodiments, the terminal and / or the network device may perform some or all of the steps in each embodiment. These steps or operations are merely examples, and the embodiments of the present application may also perform other operations or variations of various operations. In addition, each step may be performed in a different order as presented in each embodiment, and it is possible that all operations in the embodiments of the present application are not to be performed. Moreover, the size of the sequence number of each step does not mean the order of execution, and the execution order of each process should be determined by its function and inherent logic, and should not constitute any limitation to the implementation process of the embodiments of the present application.

[0284] Based on the same inventive concept as the method embodiment, the present application embodiment provides a communication device, the structure of which can be as follows: Fig.13 As shown, it includes a communication unit 1301 and a processing unit 1302.

[0285] In one embodiment, the communication device can be specifically used to implement the method executed by the terminal device. The device can be the terminal device itself, or it can be a chip or chipset in the terminal device or a part of the chip used to execute the function of the related method. Among them, the communication unit 1301 is used to receive a first reference signal sent by a first network device; send a second reference signal to a second network device, and the second reference signal is a reflected signal of the first reference signal; the first reference signal and / or the second reference signal are used to determine the radio frequency signal for collaborative energy transmission; receive the radio frequency signal. The processing unit 1302 is used to collect energy according to the radio frequency signal.

[0286] In one possible design, the RF signal includes a first RF signal and a second RF signal; the waveform information of the first RF signal is the same as that of the second RF signal, or the difference in waveform information between the first RF signal and the second RF signal is less than a first threshold.

[0287] In one possible design, the transmit phase of the second reference signal is the sum of the receive phase of the first reference signal and a phase offset.

[0288] In one possible design, the communication unit 1301 is also used to receive first indication information, where the first indication information is used to indicate the phase bias; or to send second indication information to the first network device and / or the second network device, where the second indication information is used to indicate the phase bias.

[0289] Based on the same inventive concept as the method embodiment, the present application embodiment provides a communication device, the structure of which can be as follows: Fig.14 As shown, it includes a communication unit 1401 and a processing unit 1402.

[0290] In one embodiment, the communication device can be specifically used to implement the method executed by the second network device. The device can be the second network device itself, or it can be a chip or chipset in the second network device or a part of the chip used to execute the function of the relevant method. Among them, the communication unit 1401 is used to receive auxiliary information for collaborative energy transmission from the first network device; receive the second reference signal sent by the terminal device. The processing unit 1402 is used to determine the second RF signal for collaborative energy transmission based on the second reference signal and the auxiliary information. The communication unit 1401 is also used to send the second RF signal to the terminal device, and the second RF signal is used for collaborative energy transmission.

[0291] In one possible design, the second RF signal cooperates with the first RF signal sent by the first network device to the terminal device to transmit energy; the receiving phase of the first RF signal is the same as the receiving phase of the second RF signal, or the difference between the receiving phase of the first RF signal and the receiving phase of the second RF signal is less than a second threshold.

[0292] In one possible design, the processing unit 1402 is used to determine, based on the second reference signal and the auxiliary information, a phase for sending the second RF signal at a first time.

[0293] In one possible design, the processing unit 1402 is used to determine the phase of sending the second RF signal at the first time based on the received phase, phase offset and the auxiliary information of the second reference signal.

[0294] In one possible design, the phase of the second RF signal sent at the first time is the difference between the received phase of the second reference signal and the phase offset.

[0295] In one possible design, communication unit 1401 is used to receive phase offset information.

[0296] In one possible design, the phase of the second RF signal sent at the first time is the receiving phase of the second reference signal.

[0297] In one possible design, the auxiliary information includes a sending time of a first TA and / or a first reference signal between the terminal device and the first network device.

[0298] In one possible design, the second reference signal is a reflected signal of the first reference signal.

[0299] In one possible design, the difference between the first time and the second time is equal to the difference between the second TA and the first TA; or, the difference between the first time and the second time and the difference between the second TA and the first TA is less than a third threshold; wherein the second TA is the TA between the terminal device and the second network device, and the second time is the sending time of the first RF signal.

[0300] In one possible design, the processing unit 1402 is used to determine the second TA based on the reception time of the second reference signal, the first TA, the transmission time of the first reference signal, and the time difference between the reception time of the first reference signal and the transmission time of the second reference signal.

[0301] In one possible design, the auxiliary information includes receiving resource configuration information of the second network device, and the receiving resource configuration information is used to receive the second reference signal.

[0302] Based on the same inventive concept as the method embodiment, the present application embodiment provides a communication device, the structure of which can be as follows: Fig.15 As shown, it includes a communication unit 1501 and a processing unit 1502.

[0303] In one embodiment, the communication device can be specifically used to implement the method executed by the first network device. The device can be the first network device itself, or a chip or a chipset in the first network device or a part of the chip used to execute the function of the related method. Among them, the communication unit 1501 is used to send a first reference signal to the terminal device; the processing unit 1502 is used to determine the first radio frequency signal for cooperative energy transmission based on the first reference signal; the communication unit 1501 is also used to send the first radio frequency signal to the terminal device, and the first radio frequency signal is used for cooperative energy transmission.

[0304] In one possible design, the first RF signal and the second RF signal sent by the second network device to the terminal device cooperate to transmit energy; the receiving phase of the first RF signal is the same as the receiving phase of the second RF signal, or the difference between the receiving phase of the first RF signal and the receiving phase of the second RF signal is less than a second threshold.

[0305] In one possible design, the processing unit 1502 is used to determine, based on the first reference signal, a phase for sending the first RF signal at a second time.

[0306] In one possible design, the phase of the first RF signal sent at the second time is the sending phase of the first reference signal.

[0307] In one possible design, the phase of the first RF signal sent at the second time is the receiving phase of a second reference signal, and the second reference signal is a reflected signal of the first reference signal.

[0308] In one possible design, the difference between the second time and the first time is equal to the difference between the first timing advance TA and the second TA; or, the difference between the second time and the first time and the difference between the first TA and the second TA is less than a third threshold; wherein, the first TA is the TA between the terminal device and the first network device, the second TA is the TA between the terminal device and the second network device, and the first time is the sending time of the second RF signal.

[0309] In one possible design, the communication unit 1501 is also used to: send phase offset information to the terminal device and / or the second network device, and the phase offset information is used to determine the phase of sending the second radio frequency signal.

[0310] In one possible design, the communication unit 1501 is also used to: send auxiliary information for collaborative energy transmission to the second network device.

[0311] In one possible design, the auxiliary information includes at least one of the following: a first TA between the terminal device and the first network device, a sending time of the first reference signal, and receiving resource configuration information of the second network device, wherein the receiving resource configuration information is used to receive a second reference signal.

[0312] The division of units in the embodiments of the present application is schematic and is only a logical function division. There may be other division methods in actual implementation. In addition, each functional unit in each embodiment of the present application may be integrated into a processor, or may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software function modules. It is understood that the functions or implementations of each unit in the embodiments of the present application may further refer to the relevant description of the method embodiment.

[0313] In one possible approach, the communication device may be as follows Fig.16 As shown, the device may be a communication device or a chip in a communication device, wherein the communication device may be a terminal device in the above embodiment. The device includes a processor 1601 and a communication interface 1602 , and may also include a memory 1603 .

[0314] The processor 1601 may be a central processing unit (CPU), or a digital processing unit, etc. The communication interface 1602 may be a transceiver, or an interface circuit such as a transceiver circuit, or a transceiver chip, etc. The device further includes: a memory 1603 for storing programs executed by the processor 1601. The memory 1603 may be a non-volatile memory, such as a hard disk drive (HDD) or a solid-state drive (SSD), etc., or a volatile memory (volatile memory), such as a random-access memory (RAM). The memory 1603 is any other medium that can be used to carry or store desired program codes in the form of instructions or data structures and can be accessed by a computer, but is not limited thereto.

[0315] The processor 1601 is used to execute the program code stored in the memory 1603, and the communication interface 1602 is specifically used to execute the actions of the above-mentioned communication unit 1301, which will not be repeated in this application.

[0316] The specific connection medium between the communication interface 1602, the processor 1601 and the memory 1603 is not limited in the embodiment of the present application. Fig.16 In the embodiment, the memory 1603, the processor 1601 and the communication interface 1602 are connected via a bus 1604. Fig.16 The connections between other components are shown in bold lines, which are only for illustration and are not intended to be limiting. The bus can be divided into an address bus, a data bus, a control bus, etc. For ease of representation, Fig.16 Only one thick line is used in the diagram, but this does not mean that there is only one bus or only one type of bus.

[0317] In one possible approach, the communication device may be as follows Fig.17 As shown, the device may be a communication device or a chip in a communication device, wherein the communication device may be a network device in the above embodiment (may be a first network device or a second network device). The device includes a processor 1701 and a communication interface 1702, and may also include a memory 1703.

[0318] The processor 1701 may be a CPU, or a digital processing unit, etc. The communication interface 1702 may be a transceiver, or an interface circuit such as a transceiver circuit, or a transceiver chip, etc. The device further includes: a memory 1703, which is used to store the program executed by the processor 1701. The memory 1703 may be a non-volatile memory, such as an HDD or an SSD, etc., or a volatile memory, such as a RAM. The memory 1703 is any other medium that can be used to carry or store the desired program code in the form of instructions or data structures and can be accessed by a computer, but is not limited thereto.

[0319] The processor 1701 is used to execute the program code stored in the memory 1703, and the communication interface 1702 is specifically used to execute the actions of the above-mentioned communication unit 1401 or communication unit 1501, which will not be repeated in this application.

[0320] The specific connection medium between the communication interface 1702, the processor 1701 and the memory 1703 is not limited in the embodiment of the present application. Fig.17 The memory 1703, the processor 1701 and the communication interface 1702 are connected via a bus 1704. Fig.17The connections between other components are shown in bold lines, which are only for illustration and are not intended to be limiting. The bus can be divided into an address bus, a data bus, a control bus, etc. For ease of representation, Fig.17 Only one thick line is used in the diagram, but this does not mean that there is only one bus or only one type of bus.

[0321] An embodiment of the present application also provides a communication system, including a communication device for implementing the functions of the terminal device in the above embodiment and a communication device for implementing the functions of the network device (which may include a first network device and / or a second network device) in the above embodiment.

[0322] An embodiment of the present application also provides a computer-readable storage medium for storing computer software instructions required to be executed by the above-mentioned processor, which includes a program required to be executed by the above-mentioned processor.

[0323] The embodiment of the present application also provides a computer program product, comprising a computer program for executing the above-mentioned processor.

[0324] Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, systems, or computer program products. Therefore, the present application may 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 may adopt the form of a computer program product implemented in one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) that include computer-usable program code.

[0325] 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 process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart 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 generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0326] These computer program instructions may also be stored in a computer-readable memory capable of directing 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 an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1A function specified in one or more boxes.

[0327] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process in the computer or other programmable device. Figure 1 A process or multiple processes and / or boxes Figure 1 A step that specifies a function in one or more boxes.

[0328] Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the scope of protection of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include these modifications and variations.

Claims

1. A communication method, characterized in that: Applied to a terminal device, the method comprises: Receiving a first reference signal sent by a first network device; Sending a second reference signal to a second network device, where the second reference signal is a reflected signal of the first reference signal; the first reference signal and / or the second reference signal is used to determine a radio frequency signal for cooperative energy transmission; receiving the radio frequency signal; Energy is collected according to the radio frequency signal.

2. The method according to claim 1, characterized in that The radio frequency signal includes a first radio frequency signal and a second radio frequency signal; The waveform information of the first RF signal is the same as that of the second RF signal, or the difference between the waveform information of the first RF signal and that of the second RF signal is less than a first threshold.

3. The method according to claim 1 or 2, characterized in that The transmission phase of the second reference signal is the sum of the reception phase of the first reference signal and a phase offset.

4. The method according to claim 3, characterized in that The method further comprises: receiving first indication information, where the first indication information is used to indicate the phase offset; or Sending second indication information to the first network device and / or the second network device, where the second indication information is used to indicate the phase offset.

5. A communication method, characterized in that: Applied to the second network device, the method comprises: receiving auxiliary information for collaborative energy transmission from the first network device; Receiving a second reference signal sent by a terminal device; Determine a second radio frequency signal for cooperative energy transmission according to the second reference signal and the auxiliary information; The second radio frequency signal is sent to the terminal device, where the second radio frequency signal is used for collaborative energy transmission.

6. The method according to claim 5, characterized in that The second radio frequency signal cooperates with the first radio frequency signal sent by the first network device to the terminal device to transmit energy; A reception phase of the first RF signal is the same as a reception phase of the second RF signal, or a difference between a reception phase of the first RF signal and a reception phase of the second RF signal is smaller than a second threshold.

7. The method according to claim 6, characterized in that The step of determining the second radio frequency signal for cooperative energy transmission according to the second reference signal and the auxiliary information includes: A phase for sending the second radio frequency signal at a first time is determined according to the second reference signal and the auxiliary information.

8. The method according to claim 7, characterized in that The determining the phase of sending the second radio frequency signal at the first time includes: The phase for sending the second radio frequency signal at a first time is determined according to the received phase of the second reference signal, the phase offset, and the auxiliary information.

9. The method according to claim 8, characterized in that The phase of the second radio frequency signal sent at the first time is the difference between the received phase of the second reference signal and the phase offset.

10. The method according to claim 8 or 9, characterized in that The method further comprises: Receive phase offset information.

11. The method according to claim 7, characterized in that The phase of sending the second radio frequency signal at the first time is the receiving phase of the second reference signal.

12. The method according to any one of claims 7 to 11, characterized in that: The auxiliary information includes a first timing advance TA and / or a sending time of a first reference signal between the terminal device and the first network device.

13. The method according to claim 12, characterized in that The second reference signal is a reflected signal of the first reference signal.

14. The method according to claim 12 or 13, characterized in that The difference between the first time and the second time is equal to the difference between the second TA and the first TA; or, the difference between the difference between the first time and the second time and the difference between the second TA and the first TA is less than a third threshold; The second TA is the TA between the terminal device and the second network device, and the second time is the sending time of the first radio frequency signal.

15. The method according to claim 14, characterized in that The method further comprises: The second TA is determined according to a reception time of the second reference signal, the first TA, a transmission time of the first reference signal, and a time difference between a reception time of the first reference signal and a transmission time of the second reference signal.

16. The method according to any one of claims 6 to 15, characterized in that: The auxiliary information includes reception resource configuration information of the second network device, where the reception resource configuration information is used to receive the second reference signal.

17. A communication method, characterized in that: Applied to a first network device, the method comprises: Sending a first reference signal to a terminal device; Determining a first radio frequency signal for cooperative energy transmission according to the first reference signal; The first radio frequency signal is sent to the terminal device, where the first radio frequency signal is used for collaborative energy transmission.

18. The method according to claim 17, characterized in that The first radio frequency signal and the second radio frequency signal sent by the second network device to the terminal device are cooperatively transmitted; A reception phase of the first RF signal is the same as a reception phase of the second RF signal, or a difference between a reception phase of the first RF signal and a reception phase of the second RF signal is smaller than a second threshold.

19. The method according to claim 18, characterized in that The step of determining the first radio frequency signal for cooperative energy transmission according to the first reference signal includes: The phase of sending the first radio frequency signal at a second time is determined according to the first reference signal.

20. The method of claim 19, wherein: The phase of sending the first radio frequency signal at the second time is the sending phase of the first reference signal.

21. The method of claim 19, wherein: The phase of sending the first radio frequency signal at the second time is the receiving phase of the second reference signal, and the second reference signal is a reflected signal of the first reference signal.

22. The method according to any one of claims 19 to 21, characterized in that: The difference between the second time and the first time is equal to the difference between the first timing advance TA and the second TA; or, the difference between the second time and the first time and the difference between the first TA and the second TA is less than a third threshold; The first TA is the TA between the terminal device and the first network device, the second TA is the TA between the terminal device and the second network device, and the first time is the sending time of the second radio frequency signal.

23. The method according to any one of claims 18 to 22, characterized in that: The method further comprises: Phase offset information is sent to the terminal device and / or the second network device, where the phase offset information is used to determine the phase for sending the second radio frequency signal.

24. The method according to any one of claims 18 to 23, characterized in that: The method further comprises: Auxiliary information for collaborative energy transmission is sent to the second network device.

25. The method of claim 24, wherein: The auxiliary information includes at least one of the following: A first TA between the terminal device and the first network device; a sending time of the first reference signal; The second network device receives resource configuration information, where the reception resource configuration information is used to receive a second reference signal.

26. A communication device, characterized in that: The method comprises a module for executing the method according to any one of claims 1 to 4, or a module for executing the method according to any one of claims 5 to 16, or a module for executing the method according to any one of claims 17 to 25.

27. A communication device, characterized in that: include: A processor, wherein the processor is used to execute the method according to any one of claims 1 to 4, or to execute the method according to any one of claims 5 to 16, or to execute the method according to any one of claims 17 to 25.

28. 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-readable storage medium implements the method as claimed in any one of claims 1 to 4, or implements the method as claimed in any one of claims 5 to 16, or implements the method as claimed in any one of claims 17 to 25.

29. A computer program product, characterized in that The invention comprises a computer program, which, when executed by a communication device, implements the method according to any one of claims 1 to 4, or implements the method according to any one of claims 5 to 16, or implements the method according to any one of claims 17 to 25.

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