WO2024041333A1 - Procédé et appareil de collecte d'énergie - Google Patents

Procédé et appareil de collecte d'énergie Download PDF

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Publication number
WO2024041333A1
WO2024041333A1 PCT/CN2023/110627 CN2023110627W WO2024041333A1 WO 2024041333 A1 WO2024041333 A1 WO 2024041333A1 CN 2023110627 W CN2023110627 W CN 2023110627W WO 2024041333 A1 WO2024041333 A1 WO 2024041333A1
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WO
WIPO (PCT)
Prior art keywords
terminal
radio frequency
frequency signal
network device
received power
Prior art date
Application number
PCT/CN2023/110627
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English (en)
Chinese (zh)
Inventor
酉春华
娄崇
范强
Original Assignee
华为技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
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Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Publication of WO2024041333A1 publication Critical patent/WO2024041333A1/fr

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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
    • H02J50/20—Circuit arrangements or systems for wireless supply or distribution of electric power using microwaves or radio frequency waves
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
    • H02J50/80—Circuit arrangements or systems for wireless supply or distribution of electric power involving the exchange of data, concerning supply or distribution of electric power, between transmitting devices and receiving devices
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/02—Traffic management, e.g. flow control or congestion control
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/02—Power saving arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource

Definitions

  • the present application relates to the field of communication technology, and in particular, to an energy collection method and device.
  • IoT Internet of things
  • Batteries can be installed in IoT devices to provide power to the IoT devices through the batteries.
  • the power stored in the battery is limited. If the batteries are regularly replaced 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.
  • This application provides an energy collection method and device to facilitate meeting the energy collection needs of terminals.
  • embodiments of the present application provide an energy collection method, which can be applied to a first network device or a module (such as a chip) in the first network device.
  • the first network device receives first indication information from the terminal, the first indication information indicating the expected received power of the radio frequency signal used for the terminal to collect energy; and, sending the first radio frequency signal to the terminal , the transmit power of the first radio frequency signal is determined according to the expected received power, and the first radio frequency signal is used for the terminal to collect energy.
  • the first indication information indicates the expected received power of the radio frequency signal used by the terminal to collect energy, which may be replaced by: the first indication information indicates the expected received power of the radio frequency signal used for collecting energy that the terminal expects to receive. Receive power.
  • the terminal can indicate the expected received power to the first network device through the first indication information, and then the first network device can determine the transmit power of the first radio frequency signal based on the expected received power, and send the first radio frequency signal to the terminal; That is to say, when determining the transmission power of the first radio frequency signal, the first network device considers the energy collection requirements of the terminal (such as the expected receiving power of the terminal), thereby facilitating meeting the energy collection requirements of the terminal.
  • the conversion rate (or the efficiency of harvesting energy) corresponding to the terminal's expected received power may be greater than or equal to the conversion rate threshold (or the efficiency threshold of harvested energy). Therefore, when the first network device receives power according to the terminal's expected When the power determines the transmission power of the first radio frequency signal, the terminal has a higher conversion rate of converting the first radio frequency signal into electrical energy, which can reduce energy loss during the conversion process and improve the energy transfer efficiency of wireless power transmission.
  • the transmit power of the first radio frequency signal is determined based on the expected receive power.
  • the method further includes: sending a reference signal to the terminal; receiving the received power of the reference signal reported by the terminal; and based on the transmit power of the reference signal, the The received power and the expected received power determine the transmit power of the first radio frequency signal.
  • determining the transmission power of the first radio frequency signal according to the transmission power of the reference signal, the reception power of the reference signal and the expected reception power includes: according to the transmission power of the reference signal Transmit power and the received power of the reference signal to determine the path loss between the first network device and the terminal; determine the transmit power of the first radio frequency signal based on the path loss and the expected received power.
  • the method further includes: sending configuration information to the terminal; wherein the configuration information is used to instruct the terminal to report the received power of the reference signal periodically; or, the configuration The information is used to instruct the terminal to report the received power of the reference signal when the variation of the received power of the reference signal is greater than or equal to a variation threshold.
  • the terminal can send the received power of the reference signal to the first network device according to the configuration information, without having to report the received power of the reference signal every time after measuring the received power of the reference signal, thereby reducing invalid signaling transmission and effectively Save signaling overhead.
  • the method further includes: sending request information to the terminal, where the request information is used to request the terminal to report the expected received power.
  • the request information includes an efficiency threshold for collecting energy, and the efficiency threshold for collecting energy is used to determine the expected received power; when the received power of the first radio frequency signal is the expected received power, When the power is increased, the conversion rate of the terminal to convert the first radio frequency signal into direct current power is greater than or equal to the efficiency threshold of collecting energy.
  • the method further includes: sending a collaboration request message to a second network device, the collaboration request message being used to request the second network device to send a second radio frequency signal to the terminal, the The second radio frequency signal is used by the terminal to collect energy; wherein the cooperation request message includes a first received power, and the first received power is used to determine the transmit power of the second radio frequency signal.
  • the first network device and the second network device can cooperate to meet the expected received power of the terminal, thereby facilitating meeting the energy collection requirements of the terminal.
  • the first received power is determined based on the expected received power and the received power of the first radio frequency signal estimated by the first network device.
  • the cooperation request message includes information about a first time-frequency resource, and the first time-frequency resource is used to carry the second radio frequency signal; wherein the time-frequency resource for carrying the second radio frequency signal is The frequency resource is the same as the time-frequency resource carrying the first radio frequency signal.
  • the first received power is the expected received power.
  • the method further includes: receiving a collaborative response message from the second network device, where the collaborative response message includes information on a second time-frequency resource, and the second time-frequency resource is used to carry the second radio frequency signal.
  • the method further includes: sending second indication information to the terminal, the second indication information indicating at least one of the following: time-frequency resources carrying the first radio frequency signal; The time-frequency resource of the second radio frequency signal; the starting time for the first network device to send the first radio frequency signal to the terminal; the time for the second network device to send the second radio frequency signal to the terminal Start time.
  • the terminal after it is determined that it does not need to receive the first radio frequency signal and the second radio frequency signal, it can be in the sleep state; when it is determined that it needs to receive the first radio frequency signal or the second radio frequency signal, it can be in the sleep state. Wake up in the state to receive the first radio frequency signal or the second radio frequency signal, thereby saving energy consumption of the terminal.
  • the method further includes: receiving third indication information from the terminal, the third indication information being used to request the first network device to adjust the transmission power of the first radio frequency signal. ; According to the third indication information, adjust the transmission power of the first radio frequency signal.
  • the terminal can send the third indication information to the first network device, and then the first network device dynamically adjusts the transmission power of the first radio frequency signal according to the third indication information, so as to ensure that the receiving power of the first radio frequency signal meets the terminal's expected reception. power.
  • embodiments of the present application provide an energy collection method, which can be applied to a second network device or a module (such as a chip) in the second network device.
  • the second network device receives a collaboration request message from the first network device, and the collaboration request message includes the first receiving power; and sends a second radio frequency signal to the terminal according to the collaboration request message, and the second radio frequency
  • the transmit power of the signal is determined based on the first received power, and the second radio frequency signal is used by the terminal to collect energy.
  • the first received power is the first radio frequency signal sent to the terminal estimated by the first network device based on the expected received power of the radio frequency signal used for the terminal to collect energy and the first network device. Determined by the received power, the first radio frequency signal is used by the terminal to collect energy.
  • the cooperation request message includes information about a first time-frequency resource, and the first time-frequency resource is used to carry the second radio frequency signal; wherein the time-frequency resource for carrying the second radio frequency signal is The frequency resource is the same as the time-frequency resource carrying the first radio frequency signal.
  • the first received power is an expected received power of a radio frequency signal used by the terminal to collect energy.
  • the method further includes: sending a collaborative response message to the first network device, where the collaborative response message includes information about a second time-frequency resource, and the second time-frequency resource is used to carry the second radio frequency signal.
  • embodiments of the present application provide an energy collection method.
  • This method can be applied to a terminal or a module (such as a chip) in the terminal.
  • the terminal transmits data to the first network.
  • the device sends first indication information, the first indication information indicating the expected received power of the radio frequency signal used for the terminal to collect energy; and, receiving the first radio frequency signal from the first network device, the first radio frequency The signal is used by the terminal to collect energy.
  • the transmit power of the first radio frequency signal is determined based on the expected receive power.
  • the received power of the first radio frequency signal is within the range of the expected received power.
  • the method further includes: receiving a reference signal from the first network device; reporting the received power of the reference signal to the first network device; wherein the first radio frequency signal The transmit power is based on the expected receive power, the The received power of the reference signal and the transmit power of the reference signal are determined.
  • the method further includes: receiving configuration information from the first network device; wherein the configuration information is used to instruct the terminal to report the received power of the reference signal periodically; or , the configuration information is used to instruct the terminal to report the received power of the reference signal when the variation of the received power of the reference signal is greater than or equal to a variation threshold.
  • sending the first indication information to the first network device includes: receiving request information from the first network device; and sending the requested information to the first network device according to the request information. the first instruction information.
  • the request information includes an efficiency threshold for harvesting energy; the method further includes: determining the expected received power according to the efficiency threshold for harvesting energy.
  • the method further includes: receiving a second radio frequency signal from a second network device, where the second radio frequency signal is used by the terminal to collect energy.
  • the sum of the received power of the second radio frequency signal and the received power of the first radio frequency signal is within the range of the expected received power; or, the received power of the second radio frequency signal within the range of the desired received power.
  • the method further includes: receiving second indication information from the first network device, the second indication information indicating at least one of the following: time-frequency carrying the first radio frequency signal resources; time-frequency resources carrying the second radio frequency signal; the starting time for the first network device to send the first radio frequency signal to the terminal; the second network device to send the first radio frequency signal to the terminal. 2. The starting time of the RF signal.
  • the method further includes: sending third indication information to the first network device, the third indication information being used to request the first network device to adjust the frequency of the first radio frequency signal. Transmit power.
  • embodiments of the present application provide an energy collection method, which can be applied to a first network device or a module (such as a chip) in the first network device.
  • the first network device obtains first configuration information, the first configuration information includes parameters for transmitting energy to the terminal; and, according to the first configuration information, sends a first radio frequency signal to the terminal, the The first radio frequency signal is used for the terminal to collect energy; wherein the parameters for transmitting energy to the terminal include at least one of the following: a first time period and the shortest duration of sending a radio frequency signal to the terminal within the first time period.
  • the ratio to the first time period; the first time period and the shortest duration of sending radio frequency signals to the terminal in the first time period; the second time period and the expected reception of the terminal in the second time period The energy value obtained; the priority of sending radio frequency signals to the terminal.
  • the first network device since the first network device sends the first radio frequency signal to the terminal according to the first configuration information, it is easy to meet the energy collection needs of the terminal and can transmit energy to different terminals in a more targeted manner.
  • the method further includes: sending a collaboration request message to a second network device, the collaboration request message being used to request the second network device to send a second radio frequency signal to the terminal, the The second radio frequency signal is used by the terminal to collect energy; wherein the cooperation request message includes second configuration information, and the second configuration information includes parameters corresponding to sending the second radio frequency signal.
  • the second configuration information is determined based on the first configuration information and parameters corresponding to sending the first radio frequency signal.
  • sending the parameters corresponding to the first radio frequency signal refers to sending the parameters that the first radio frequency signal can satisfy to transmit energy to the terminal.
  • the method further includes: receiving a collaborative response message from the second network device, where the collaborative response message includes time-frequency resource information, and the time-frequency resource information is used to indicate that the The time-frequency resource of the second radio frequency signal.
  • the method further includes: sending indication information to the terminal, the indication information indicating at least one of the following: time-frequency resources carrying the first radio frequency signal; carrying the second radio frequency The time-frequency resource of the signal; the starting time for the first network device to send the first radio frequency signal to the terminal; the starting time for the second network device to send the second radio frequency signal to the terminal.
  • the terminal after it is determined that it does not need to receive the first radio frequency signal and the second radio frequency signal, it can be in the sleep state; when it is determined that it needs to receive the first radio frequency signal or the second radio frequency signal, it can be in the sleep state. Wake up to receive the first radio frequency signal or the second radio frequency signal, thereby saving energy consumption of the terminal.
  • obtaining the first configuration information includes: obtaining the first configuration information from the terminal or core network device. configuration information.
  • embodiments of the present application provide an energy collection method, which can be applied to a second network device or a module (such as a chip) in the second network device.
  • the second network device receives a collaboration request message from the first network device, where the collaboration request message includes second configuration information; and, according to the collaboration request message, sends a second radio frequency signal to the terminal, and the third Two radio frequency signals are used for the terminal to collect energy; wherein the second configuration information includes parameters corresponding to sending the second radio frequency signal.
  • the parameters corresponding to sending the second radio frequency signal refer to parameters that need to be met to transmit energy to the terminal when sending the first radio frequency signal.
  • the method further includes: sending a collaborative response message to the first network device, where the collaborative response message includes time-frequency resource information, and the time-frequency resource information is used to indicate that the first network device carries the first network device. 2. Time-frequency resources of radio frequency signals.
  • embodiments of the present application provide an energy collection method.
  • This method can be applied to a terminal or a module (such as a chip) in the terminal. Taking this method as an example, it is applied to a terminal.
  • the terminal transmits data to the first network.
  • the device sends first configuration information, the first configuration information including parameters for transmitting energy to the terminal; receives a first radio frequency signal sent by the first network device according to the first configuration information, the first radio frequency signal is used to The terminal collects energy; wherein the parameters for transmitting energy to the terminal include at least one of the following: a first time period and the shortest duration of sending a radio frequency signal to the terminal within the first time period and the first time period.
  • the ratio of the segments; the first time segment and the duration, which is the shortest duration for sending a radio frequency signal to the terminal in the first time segment; the second time segment and the expected reception of the terminal in the second time segment The energy value obtained; the priority of sending radio frequency signals to the terminal.
  • the method further includes: receiving a second radio frequency signal sent by the second network device according to the second configuration information, the first radio frequency signal being used for the terminal to collect energy; wherein, the first radio frequency signal is used for the terminal to collect energy;
  • the second configuration information is determined based on the first configuration information and parameters corresponding to sending the first radio frequency signal.
  • the present application provides a communication device.
  • the communication device is provided with the functions of implementing the above-mentioned first to sixth aspects.
  • the communication device includes a communication device corresponding to performing the operations related to the above-mentioned first to sixth aspects.
  • Modules, units or means, the modules, units or means can be implemented by software, or implemented by hardware, or can also be implemented by hardware executing corresponding software.
  • the communication device includes a processing unit and a communication unit, where the communication unit can be used to send and receive signals to implement communication between the communication device and other devices; the processing unit can be used to perform the communication Some internal operations of the device.
  • the functions performed by the processing unit and the communication unit may correspond to the operations related to the above-mentioned first to sixth aspects.
  • the communication device includes a processor, and the processor can be coupled to a memory.
  • the memory may store necessary computer programs or instructions to implement the functions related to the above-mentioned first to sixth aspects.
  • the processor can execute the computer program or instructions stored in the memory. When the computer program or instructions are executed, the communication device can implement any possible design or implementation in the above-mentioned first to sixth aspects. Methods.
  • the communication device includes a processor and a memory, and the memory can store the necessary computer programs or instructions to implement the functions related to the above-mentioned first to sixth aspects.
  • the processor can execute the computer program or instructions stored in the memory.
  • the communication device can implement any possible design or implementation in the above-mentioned first to sixth aspects. Methods.
  • the communication device includes a processor and an interface circuit, wherein the processor is configured to communicate with other devices through the interface circuit and execute any possible design in the above first to sixth aspects or Methods in the implementation.
  • the processor can be implemented by hardware or software.
  • the processor can be a logic circuit, an integrated circuit, etc.; when implemented by software, the processor can be implemented by software.
  • the processor may be a general-purpose processor implemented by reading software code stored in memory.
  • the above processors may be one or more, and the memories may be one or more.
  • the memory can be integrated with the processor, or the memory can be provided separately from the processor. During the specific implementation process, the memory and the processor can be integrated on the same chip, or they can be respectively provided on different chips. The embodiments of this application do not limit the type of memory and the arrangement method of the memory and the processor.
  • the present application provides a communication system, which may include a first network device and a second network device; wherein the first network device is used to execute the energy collection method provided in the first aspect, so The second network device is configured to perform the energy collection method provided in the second aspect; in a possible design, the communication system further includes a terminal, and the terminal is configured to perform the energy collection method provided in the third aspect. .
  • the communication system may include a first network device and a second network device; wherein, the first network device is used to perform the energy collection method provided in the fourth aspect, and the second network device is used to perform the above-mentioned third network device.
  • the energy collection method provided in the fifth aspect in one possible design, the communication system further includes a terminal, and the terminal is used to execute the energy collection method provided in the sixth aspect.
  • the present application provides a computer-readable storage medium.
  • Computer-readable instructions are stored in the computer storage medium.
  • the computer reads and executes the computer-readable instructions, the computer is caused to execute the above-mentioned first aspect to Any possible method in the design of the sixth aspect.
  • the present application provides a computer program product, which when a computer reads and executes the computer program product, causes the computer to execute the method in any possible design of the above-mentioned first to sixth aspects.
  • the present application provides a chip.
  • the chip includes a processor.
  • the processor is coupled to a memory and is used to read and execute a software program stored in the memory to implement the above first aspect to the third aspect.
  • Figure 1 is a schematic diagram of a network architecture applicable to the embodiment of the present application.
  • Figure 2 is a schematic diagram of wireless power transmission between different devices provided by an embodiment of the present application.
  • Figure 3 is an example of a multi-sine waveform provided by the embodiment of this application.
  • Figure 4 is a schematic diagram of the relationship between conversion rate and received power provided by the embodiment of the present application.
  • Figure 5 is a schematic diagram of the relationship between received power and conversion rate corresponding to different terminals with the same waveform provided by the embodiment of the present application;
  • Figure 6 is a schematic flow chart corresponding to the energy collection method provided in Embodiment 1 of the present application.
  • Figure 7 is a schematic flow chart corresponding to the energy collection method provided in Embodiment 2 of the present application.
  • Figure 8 is a schematic flow chart corresponding to the energy collection method provided in Embodiment 3 of the present application.
  • Figure 9 is a schematic flow chart corresponding to the energy collection method provided in Embodiment 4 of the present application.
  • Figure 10 is a schematic flow chart corresponding to the energy collection method provided in Embodiment 5 of the present application.
  • Figure 11 is a possible exemplary block diagram of the device involved in the embodiment of the present application.
  • Figure 12 is a schematic structural diagram of a terminal provided by an embodiment of the present application.
  • Figure 13 is a schematic structural diagram of a network device provided by an embodiment of the present application.
  • FIG 1 is a schematic architectural diagram of a communication system applied in an embodiment of the present application.
  • the communication system 1000 includes a wireless access network 100 and a core network 200.
  • the communication system 1000 may also include the Internet 300.
  • the radio access network 100 may include at least one network device (including radio access network device), such as 110a and 110b in Figure 1, and may also include at least one terminal, such as 120a-120j in Figure 1.
  • 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 pump
  • 120d is a home access point (HAP) arranged indoors or outdoors.
  • 120g is a laptop
  • 120h is a printer
  • 120i is a drone.
  • the terminal 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 equipment and the radio access network equipment can be independent and different physical devices, or the functions of the core network equipment and the logical functions of the radio access network equipment can be integrated on the same physical device, or they can be one physical device. It integrates the functions of some core network equipment and some functions of wireless access network equipment. Terminals and terminals and wireless access network equipment and wireless access network equipment can be connected to each other in a wired or wireless manner.
  • Figure 1 is only a schematic diagram.
  • the communication system may also include other equipment, such as wireless relay equipment and wireless backhaul equipment, which are not shown in Figure 1 .
  • Network equipment includes wireless access network equipment.
  • Network equipment can be base stations, evolved base stations (evolved NodeB, eNodeB), transmission reception points (TRP), fifth generation (5th generation, 5G) mobile communication systems.
  • Next generation base station (next generation NodeB, gNB), base station in sixth generation (6th generation, 6G) mobile communication system, base station in future mobile communication system or access node in wireless fidelity (WiFi) system etc.
  • the network device may be a macro base station (110a in Figure 1), a micro base station or an indoor station (110b in Figure 1), or a relay node or donor node, etc.
  • the network equipment may include one or more centralized units (CU) and one or more Multiple distributed units (DUs), multiple DUs can be centrally controlled by one CU. This architecture can be called a CU-DU separation architecture.
  • the device used to implement the function of the access device may be a network device; it may also be a device that can support the network device to implement the function, such as a chip system, and the device may be installed in the network device.
  • the chip system can be composed of chips, or can also include chips and other discrete devices.
  • the functions of the network device can also be implemented through multiple network function entities, and each network function entity is used to implement part of the functions of the network device.
  • These network function entities can be network elements in hardware devices, software functions running on dedicated hardware, or virtualized functions instantiated on a platform (such as a cloud platform).
  • the technical solution provided by the embodiment of the present application is described by taking the device for realizing the functions of the network device being a network device as an example.
  • the terminal can also be called terminal equipment, user equipment (UE), mobile station, mobile terminal, etc.
  • Terminals 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 wear, smart transportation, smart city, etc.
  • Terminals can be mobile phones, tablets, computers with wireless transceiver functions, wearable devices, vehicles, drones, helicopters, airplanes, ships, robots, robotic arms, smart home devices, etc.
  • the device used to implement the function of the terminal may be a terminal; it may also be a device that can support the terminal to implement the function, such as a chip system, and the device may be installed in the terminal.
  • the technical solution provided by the embodiments of the present application is described by taking the device for realizing the functions of the terminal being a terminal as an example.
  • the mobile phones in Figure 1 include 120a, 120e, 120f and 120j.
  • the mobile phone 120a can access the base station 110a, connect to the car 120b, directly communicate with the mobile phone 120e and access the HAP;
  • the mobile phone 120e can access the HAP and directly communicate with the mobile phone 120a;
  • the mobile phone 120f can access the micro station 110b.
  • the mobile phone 120j can control the drone 120i.
  • the helicopter or drone 120i in Figure 1 can be configured as a mobile base station.
  • the terminal 120i is a base station; but for the base station 110a, 120i It is the terminal, that is, the communication between 110a and 120i is through the wireless air interface protocol.
  • communication between 110a and 120i can also be carried out through an interface protocol between base stations.
  • relative to 110a, 120i is also a base station. Therefore, both the wireless access network and the terminal can be collectively called communication devices.
  • 110a and 110b in Figure 1 can be called communication devices with base station functions
  • 120a-120j in Figure 1 can be called communication devices with terminal functions.
  • Network equipment and terminals can be fixed-location or removable.
  • Network equipment and terminals can be deployed on land, indoors or outdoors, handheld or vehicle-mounted; they can also be deployed on water; they can also be deployed on aircraft, balloons and satellites in the sky.
  • the embodiments of this application do not limit the application scenarios of network devices and terminals.
  • Communication between network equipment and terminals, between network equipment and network equipment, and between terminals can be carried out through licensed spectrum, communication can be carried out through unlicensed spectrum, or communication can be carried out through licensed spectrum and unlicensed spectrum at the same time; yes It is possible to communicate using a spectrum below 6 gigahertz (GHz), a spectrum above 6 GHz, or both a spectrum below 6 GHz and a spectrum above 6 GHz.
  • GHz gigahertz
  • the embodiments of the present application do not limit the spectrum resources used for wireless communication.
  • the communication system shown in Figure 1 above can support various radio access technologies (RAT).
  • the communication system shown in Figure 1 can be a fourth generation (4th generation, 4G) communication system (also known as Long term evolution (long term evolution, LTE) communication system), 5G communication system (also called new radio (NR) communication system), or future-oriented evolution system, such as 6G communication system.
  • 4G fourth generation
  • LTE Long term evolution
  • NR new radio
  • 6G communication system 6G communication system.
  • the communication system and business scenarios described in the embodiments of this application are for the purpose of explaining the technical solutions of the embodiments of this application more clearly, and do not constitute a limitation on the technical solutions provided by the embodiments of this application.
  • Those of ordinary skill in the art will know that with the communication With the evolution of the system and the emergence of new business scenarios, the technical solutions provided in the embodiments of this application are also applicable to similar technical problems.
  • Wireless energy transmission can also be called wireless energy transmission.
  • Energy can refer to electrical energy or other forms of energy, and is not specifically limited.
  • wireless transmission as wireless power transmission is used as an example for description.
  • Wireless power transmission is a non-contact power transmission method between different devices. For example, device 1 converts a DC signal into a low-energy RF signal, then performs power amplifier processing on the low-energy RF signal to obtain a high-energy RF signal, and The high-energy radio frequency signal is sent to device 2. After receiving the radio frequency signal from device 1, device 2 converts the radio frequency signal into a DC signal. The DC signal carries DC power. Because the receiver of wireless power transmission is simple and flexible in movement 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, through wireless power transmission Provide electrical energy to these devices.
  • uW microwatts
  • FIG. 2 is a schematic diagram of wireless power transmission between different devices.
  • the device used to provide electric energy may be called a sender device, and the device used to collect electric energy may be called a receiver device.
  • the sender 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 configured with an energy harvesting circuit, such as a terminal.
  • the energy harvesting circuit includes, for example, a rectifier and a power management circuit.
  • network equipment can include direct current (DC) power modules, DC-to-RF conversion modules, beamforming network and transmitting antennas (beamforming network and transmitting antennas) modules; receiver Can include receiving antennas modules, rectifiers, power management circuitry and DC loads.
  • the DC power module of the network equipment inputs the DC signal to the DC-to-RF conversion module.
  • the DC-to-RF conversion module converts the DC signal into a radio frequency signal, and then forms the network and transmitting antenna module through the beam. Emit radio frequency signals.
  • the receiving antenna module of the terminal receives the RF signal, it converts the RF signal into DC power through the rectifier, and transfers the DC power to the power management circuit.
  • the power management circuit can use capacitors or batteries to process the DC power. Store and provide power to DC loads (such as power modules in terminals) when needed.
  • Antenna gain is used to describe the degree to which an antenna radiates input power in a concentrated manner and can be used to measure the antenna's ability to receive or transmit signals in a certain direction.
  • the transmission power of the radio frequency signal may refer to the first power or the second power of the radio frequency signal.
  • the second power of the radio frequency signal is equal to the sum of the first power of the radio frequency signal and the antenna gain of the sender.
  • the received power of the radio frequency signal may refer to the third power or the fourth power of the radio frequency signal.
  • the fourth power of the radio frequency signal is equal to the sum of the third power of the radio frequency signal and the antenna gain of the receiver.
  • the sender of the radio frequency signal is the network device
  • the receiver of the radio frequency signal is the terminal.
  • the first power of the radio frequency signal may refer to: the corresponding power when the DC-to-RF conversion module of the network device converts the DC signal into a radio frequency signal
  • the second power of the radio frequency signal may be It refers to: the corresponding power when the beamforming network and transmitting antenna module of the network equipment send out the radio frequency signal
  • the third power of the radio frequency signal can refer to: the corresponding power when the radio frequency signal sent by the network equipment reaches the receiving antenna of the terminal, the radio frequency signal
  • the fourth power may refer to the corresponding power when the receiving antenna module of the terminal inputs the radio frequency signal to the rectifier.
  • the transmitting power is the second power and the receiving power is the third power
  • the DC-to-RF conversion module of a network device converts a DC signal into a radio frequency signal
  • the corresponding power is 53dBm
  • the antenna gain of the network device is 22dBi
  • the distance between the terminal and the network equipment is 150 meters.
  • the path loss at this distance is about 70dB.
  • the transmission power or reception power (including the expected reception power below) of the radio frequency signal involved in the embodiment of the present application may be the peak power of the radio frequency signal, or may also refer to the average value of the radio frequency signal. power.
  • the waveforms of radio frequency signals can be divided into multiple types, such as continuous waveforms, multi-sine waveforms or other types of waveforms.
  • continuous waveforms and multi-sine waveforms will be taken as examples for description.
  • the continuous waveform can refer to the cosine waveform;
  • the multi-sine waveform is similar to a pulse. It is obtained by superposing multiple cosine waveforms of different frequencies and conforms to the following formula:
  • x(t) represents a multi-sine waveform
  • N represents the number of superimposed cosine waveforms
  • w k represents the k-th cosine wave.
  • the frequency of the shape A k represents the amplitude of the k-th cosine waveform
  • t represents time
  • ⁇ k represents the initial phase of the k-th cosine waveform.
  • Figure 3 shows an example of a multi-sine waveform.
  • 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, they are the same waveform.
  • the two waveforms are different waveforms.
  • the waveform parameters of a continuous waveform may include frequency (or the identity of the subcarrier carrying the continuous waveform).
  • 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 multiple superimposed cosine waveforms.
  • the waveform parameters of a multi-sine waveform may include the number of superimposed cosine waveforms, the identification of the first subcarrier and the subcarrier spacing; wherein, the subcarriers used to carry multiple cosine waveforms may be multiple consecutive subcarriers, The first subcarrier may be the subcarrier with the lowest frequency or the subcarrier with the highest frequency.
  • 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, it can be considered in the embodiment of the present application that These two waveforms are the same waveform.
  • the efficiency of the terminal in collecting energy (that is, the conversion rate of the rectifier converting RF signals into DC power) is related to the received power of the RF signal. Specifically, as the received power of the radio frequency signal gradually increases, the changing trend of the conversion rate is first from low to high, and then from high to low.
  • the rectifier has the highest conversion rate for converting RF signals into DC power (for example, the conversion rate is K1); when the received power of the RF signal is greater than A1, the greater the received power of the RF signal, and the rectifier converts the RF signal into DC power. The lower the conversion rate.
  • the rectifier The conversion rate of converting RF signals into DC power is the highest (such as the conversion rate K2); when the received power of the RF signal is greater than A2, the greater the received power of the RF signal, the lower the conversion rate of the rectifier in converting the RF signal into DC power. . It can also be seen from Figure 4 that the highest conversion rate corresponding to the continuous waveform is smaller than the highest conversion rate corresponding to the multi-sine waveform.
  • the devices such as rectifiers configured at the terminal will also affect the conversion rate of the rectifier to convert RF signals into DC power.
  • the conversion rate of the rectifier to convert the radio frequency signal into DC power is 30%;
  • the conversion rate of the rectifier to convert the radio frequency signal into DC power is 20%.
  • Figure 5 is a schematic diagram of the relationship between received power and conversion rate corresponding to different terminals with the same waveform.
  • embodiments of the present application will study the specific implementation of network equipment transmitting energy to terminals through wireless energy transmission.
  • the energy harvesting method provided by the embodiments of the present application will be introduced in detail below with reference to Embodiment 1 to Embodiment 4.
  • the terminal indicates the expected received power to the first network device, and then the first network device can determine the transmit power of the radio frequency signal used for the terminal to collect energy based on the expected received power.
  • Figure 6 is a schematic flowchart corresponding to the energy collection method provided in Embodiment 1 of the present application. As shown in Figure 6, the method may include:
  • the terminal sends first indication information to the first network device.
  • the first indication information indicates the expected received power of the radio frequency signal used by the terminal to collect energy; accordingly, the first network device receives the first indication information.
  • the "expected received power of the radio frequency signal used by the terminal to collect energy” can be understood as: the received power of the radio frequency signal used to collect energy that the terminal expects to receive.
  • the above-mentioned first indication information may be carried in radio resource control (RRC) signaling or medium access control (medium access control, MAC) layer signaling or physical layer signaling.
  • the terminal may actively send the first indication information to the first network device, or the terminal may also send the first indication information to the first network device based on the request of the first network device. For example, before S601, the first network device sends request information to the terminal.
  • the request information requests the terminal to report the above-mentioned expected received power.
  • the request information can be carried in RRC signaling or MAC layer signaling or physical layer signaling; accordingly,
  • the terminal may send the first indication information to the first network device according to the request information. Specifically, the terminal may send the first indication information to the first network device after accessing the first network device (that is, the terminal establishes an RRC connection with the first network device).
  • the terminal Before sending the first indication information to the first network device, the terminal needs to determine the expected received power. For example, the terminal can use the received power corresponding to the highest conversion rate as the expected received power based on the relationship between received power and conversion rate; for another example, the terminal can obtain the collected Energy efficiency threshold (or conversion rate threshold), and then determine the expected received power based on the conversion rate threshold.
  • the terminal can use the received power corresponding to the highest conversion rate as the expected received power based on the relationship between received power and conversion rate; for another example, the terminal can obtain the collected Energy efficiency threshold (or conversion rate threshold), and then determine the expected received power based on the conversion rate threshold.
  • the terminal can estimate the power consumption of the terminal in the future. For example, the terminal can estimate the power consumption of the terminal in the future based on the amount of data that the terminal needs to transmit in the future. quantity. Furthermore, the terminal can determine the conversion rate threshold based on the estimated power consumption. Among them, the way in which the terminal determines the conversion rate threshold based on the estimated power consumption may depend on the internal implementation of the terminal. For example, if the terminal estimates that the power consumption will be large in the future, it will determine a higher conversion rate threshold.
  • a lower conversion rate threshold is determined to facilitate the A network device transmits energy to the terminal device with lower transmission power, thereby achieving energy saving of the first network device.
  • the "lower conversion rate threshold" is relative to the "higher conversion rate threshold", and the lower conversion rate threshold can usually be higher than 50%. For example, if the terminal estimates that the power consumption in the future is greater than or equal to the power consumption threshold, the conversion rate threshold is determined to be 80%, and the terminal estimates that the power consumption in the future is less than the power consumption threshold. , then the conversion rate threshold is determined to be 60%.
  • the request information sent by the first network device to the terminal may include the conversion rate threshold, and the terminal may obtain the conversion rate threshold from the request information. That is to say, the conversion rate threshold can be determined by the first network device and sent to the terminal.
  • the first network device may determine the conversion rate threshold in multiple ways, and three possible ways are described here.
  • the first network device can estimate the power consumption of the terminal in the future. For example, the terminal can report to the first network device the amount of data that the terminal needs to transmit in the future, and then the first network device can estimate the amount of data that the terminal needs to transmit in the future. This amount of data estimates the power consumption of the terminal in the future. Furthermore, the first network device can determine the conversion rate threshold according to the estimated power consumption. For example, the first network device estimates that the terminal's power consumption will be large in the future, and then determines a higher conversion rate threshold; another example is that the first network device estimates the terminal's power consumption in the future. If it is smaller, a lower conversion rate threshold is determined.
  • the first network device can use the amount of available resources of the first network device in the future (the available resources here refer to resources that can be used to send radio frequency signals to the terminal, and the radio frequency signals are used for the terminal to collect energy), Determine the conversion rate threshold. For example, if the first network device determines that the amount of available resources is insufficient in the future, it determines a higher conversion rate threshold so that it can transmit enough power to the terminal with fewer resources; for another example, the first network device If the device determines that the available resources will be sufficient in the future, it determines a lower conversion rate threshold.
  • the available resources here refer to resources that can be used to send radio frequency signals to the terminal, and the radio frequency signals are used for the terminal to collect energy
  • the first network device can determine the conversion rate threshold by combining the estimated power consumption of the terminal in a future period and the amount of available resources of the first network device in a future period.
  • the terminal can directly determine the expected received power based on the conversion rate threshold included in the request information; or, the terminal can also determine an expected received power based on the conversion rate threshold included in the request information.
  • the new conversion rate threshold is used to determine the expected received power based on the new conversion rate threshold.
  • the terminal can determine the received power range corresponding to the conversion rate threshold according to the conversion rate threshold.
  • the received power range corresponding to the conversion rate threshold means: when the received power of the radio frequency signal received by the terminal is within the received power range corresponding to the conversion rate threshold, the conversion rate of the terminal's rectifier to convert the radio frequency signal into DC power is greater than or equal to the slew rate threshold.
  • the conversion rate threshold is 50%. If the waveform expected by the terminal is waveform a, the terminal can obtain the received power range corresponding to the conversion rate threshold based on the correspondence between the conversion rate and received power corresponding to waveform a as [ 5dbm,10dbm] (where dbm means decibel milliwatt). That is to say, when the received power of the radio frequency signal (the waveform of the radio frequency signal is waveform a) received by the terminal is within the range of [5dbm, 10dbm], the conversion rate of the terminal's rectifier to convert the radio frequency signal into DC power is greater than or equals 50%.
  • the terminal can determine the expected received power according to the received power range corresponding to the conversion rate threshold.
  • the expected received power may include one or more received powers in the received power range corresponding to the conversion rate. For example, if the received power range corresponding to the conversion rate is [5dbm, 10dbm], then the expected received power is 5dbm, 6dbm or 7dbm.
  • the received power of the radio frequency signal meets the expected received power or "the received power of the radio frequency signal is within the range of the expected received power” described in the embodiments of this application may refer to: the received power of the radio frequency signal and Any one of the one or more received powers is the same.
  • the expected received power may be a received power range
  • the received power range may be a received power range corresponding to a conversion rate greater than or equal to the conversion rate threshold, for example, the received power range is [5dbm, 10dbm]; or,
  • the received power range can also be a sub-range of the received power range corresponding to the conversion rate greater than or equal to the conversion rate threshold, for example, the received power range is [5dbm, 8dbm]; or, the received power range can also cover the conversion rate
  • the corresponding receiving power range such as the receiving power range is [5dbm, ⁇ ).
  • the received power of the radio frequency signal meets the expected received power
  • the received power of the radio frequency signal is within the range of the expected received power
  • the received power of the radio frequency signal is greater than Or equal to the minimum value of the received power range and/or less than or equal to the maximum value of the received power range.
  • the first indication information may indicate the expected received power in various ways. For example, when the expected received power includes one or more received powers, the first indication information includes the values of the one or more received powers. For another example, when the desired received power is a received power range, the first indication information includes the upper limit value and/or the lower limit value of the received power range. It can be understood that when the first indication information does not include the upper limit value, it means that the upper limit value is infinite; when the first indication information does not include the lower limit value, it means that the lower limit value is infinitesimal.
  • the first indication information also indicates other possible information.
  • the first indication information also indicates the waveform expected by the terminal.
  • the waveform expected by the terminal may include one or more waveforms.
  • the first indication information includes waveform information corresponding to one or more waveforms expected by the terminal, and the waveform information may include waveform type and waveform parameters. It can be understood that when the first indication information indicates that the waveforms expected by the terminal are multiple waveforms, each waveform may correspond to an expected received power; when the first indication information indicates the expected received power but does not indicate the waveform expected by the terminal. , in this case, the waveform of the radio frequency signal can be predefined by the protocol or default.
  • the terminal reports to the network device the four waveforms expected by the terminal through the first indication information (that is, the four waveforms corresponding to waveform numbers 1 to 4), and each waveform can correspond to an expected received power.
  • Table 1 Examples of content included in the first indication information
  • the first network device sends a first radio frequency signal to the terminal.
  • the transmission power of the first radio frequency signal is determined based on the expected received power.
  • the terminal receives the first radio frequency signal, and the first radio frequency signal is used by the terminal to collect energy.
  • the first network device can determine the transmission power of the first radio frequency signal according to the expected received power, and can also determine the time-frequency resource carrying the first radio frequency signal, and then use the transmission power of the first radio frequency signal to transmit the first radio frequency signal at the corresponding time frequency. Send a first radio frequency signal to the terminal on the resource.
  • the first network device can select a target waveform from the multiple waveforms; for example, the selected target waveform is waveform 3, then the waveform of the first radio frequency signal is Waveform 3, the expected received power is the expected received power corresponding to the target waveform.
  • the specific manner in which the first network device selects one waveform from multiple waveforms may depend on the internal implementation of the first network device, and is not specifically limited.
  • the first network device determines the transmit power of the first radio frequency signal according to the expected received power.
  • the first network device may send the first reference signal to the terminal; accordingly, the terminal may receive the first reference signal and measure the first reference signal to obtain the signal quality of the first reference signal.
  • the signal quality here may include received power, and the received power may be reference signal received power (RSRP).
  • RSRP reference signal received power
  • the terminal then sends the received power of the first reference signal to the first network device; after the first network device receives the received power of the first reference signal, the first network device can transmit power of the first reference signal, the received power of the first reference signal and the desired Received power determines the transmit power of the first radio frequency signal.
  • the first network device first determines the path loss between the first network device and the terminal based on the transmit power of the first reference signal and the received power of the first reference signal, and then determines the first radio frequency based on the path loss and the expected received power. The transmission power of the signal.
  • the first network device may send measurement configuration information to the terminal, and the measurement configuration information may include the identity of the first cell, and the terminal may receive the first reference signal on the first cell.
  • the measurement configuration information may also include the identity of the second cell, and the terminal may receive the second reference signal on the second cell (for the second reference signal, please refer to the description in Embodiment 2).
  • the expected received power is [5dbm, 10dbm]
  • the transmit power of the first reference signal is 75dbm
  • the received power of the first reference signal is 5dbm. Therefore, according to the transmit power of the first reference signal and the The path loss obtained from the received power is 70db. Further, according to the path loss and the expected received power, the transmit power corresponding to the expected received power can be obtained as [75dbm, 80dbm].
  • the transmission power of the first radio frequency signal refers to the second power of the first radio frequency signal. Therefore, the first network device determines the transmission power of the first radio frequency signal, It may mean that the first network device determines the first power and the antenna gain of the first radio frequency signal, and the sum of the first power and the antenna gain is equal to the second power (the specific values of the first power and the antenna gain may be determined by the first network device Distribution will be made based on actual circumstances, with no specific restrictions). Similarities in the following can also be understood by reference.
  • the first network device may send second indication information to the terminal, and the second indication information may indicate at least one of the following: time-frequency resources carrying the first radio frequency signal; the first network device sends the first radio frequency signal to the terminal.
  • the starting time of an RF signal may include time domain resources and frequency domain resources, and the time domain resources are, for example, periodic resources.
  • the time domain resource is a periodic resource
  • the starting time for the first network device to send the first radio frequency signal to the terminal may refer to: in each cycle, the starting time for the first network device to send the first radio frequency signal to the terminal. .
  • the terminal may receive the first radio frequency signal according to the time-frequency resource carrying the first radio frequency signal; or may determine the first radio frequency signal according to the starting time of the first network device sending the first radio frequency signal to the terminal.
  • the terminal may start receiving the first radio frequency signal.
  • the terminal determines that it does not need to receive the first radio frequency signal, it can be in the sleep state; when the terminal determines that it needs to receive the first radio frequency signal, it can wake up from the sleep state to receive the first radio frequency signal, thereby saving the energy consumption of the terminal. .
  • the first network device can determine the transmit power of the first radio frequency signal according to the expected received power; that is to say, the first network device considers the energy collection requirements of the terminal when determining the transmit power of the first radio frequency signal ( For example, the expected received power of the terminal), so as to meet the energy collection needs of the terminal.
  • the conversion rate corresponding to the expected received power of the terminal may be greater than or equal to the conversion rate threshold. Therefore, when the first network device determines the transmit power of the first radio frequency signal according to the expected received power of the terminal, the terminal is caused to convert the first radio frequency signal. Because the conversion rate of electrical energy is high, it can reduce energy loss during the conversion process and improve the energy transfer efficiency of wireless power transmission.
  • the above method may also include:
  • the terminal sends third instruction information to the first network device.
  • the third instruction information is used to request the first network device to adjust the transmission power of the first radio frequency signal. Accordingly, the first network device receives the third instruction information and adjusts the transmission power of the first radio frequency signal according to the first network device.
  • the third instruction information adjusts the transmission power of the first radio frequency signal.
  • the first network device may periodically send the first reference signal, and accordingly, the terminal may periodically receive the first reference signal.
  • the terminal determines that the variation of the received power of the first reference signal is greater than or equal to the variation
  • third indication information may be sent to the first network device, where the third indication information includes the received power of the first reference signal.
  • the change amount of the received power of the first reference signal may refer to: the absolute value of the difference between the received power of the first reference signal and the reference received power.
  • the reference received power may refer to the first value reported by the terminal last time.
  • the change threshold may be configured for the terminal by the access network device. For example, the access network device sends configuration information to the terminal.
  • the configuration information includes the change threshold, that is, the configuration information is used to indicate the change of the terminal's received power of the first reference signal.
  • the change threshold can also be predefined by the protocol.
  • the first network device can re-determine the first reference signal based on the transmit power of the first reference signal, the received power of the first reference signal (carried in the third indication information) and the expected received power.
  • the transmit power of a radio frequency signal is determined, and the first radio frequency signal is sent to the terminal according to the redetermined transmit power of the first radio frequency signal.
  • the terminal can determine that the transmit power of the first radio frequency signal needs to be adjusted, and report to the first reference signal.
  • the network device sends third instruction information. From the perspective of the network device, after receiving the third indication information, the network device can re-determine the transmission power of the first radio frequency signal (that is, the network device is not directly based on the previous transmission power of the first radio frequency signal). increase or decrease).
  • the transmission power of the first radio frequency signal redetermined by the network device is greater than the transmission power of the previous first radio frequency signal, it can be considered that the network device has increased the transmission power of the first radio frequency signal; if the transmission power of the first radio frequency signal redetermined by the network device is If the transmission power is less than the previous transmission power of the first radio frequency signal, it can be considered that the network device has reduced the transmission power of the first radio frequency signal.
  • the terminal can also set the period according to the setting period (in this application, the setting period is also (can be called a set duration) to report the received power of the first reference signal.
  • the first network device receives the received power of the first reference signal, it can determine whether the change in the received power of the first reference signal is greater than or equal to Change threshold, if yes, then the transmit power of the first radio frequency signal can be re-determined based on the transmit power of the first reference signal, the received power of the first reference signal (currently reported by the terminal) and the expected received power; if not, then the transmit power of the first radio frequency signal can be re-determined The transmission power of the first radio frequency signal is not adjusted yet.
  • the change amount of the received power of the first reference signal may refer to: the absolute value of the difference between the received power of the first reference signal and the reference received power, and the reference received power may refer to the previous time used to determine the first
  • the transmit power of the radio frequency signal is the received power of the first reference signal.
  • the setting period may be configured for the terminal by the access network device.
  • the network device sends configuration information to the terminal.
  • the configuration information includes the setting period. That is, the configuration information is used to instruct the terminal to report the received power of the first reference signal according to the setting period. ;
  • the set period can also be pre-defined by the protocol.
  • the terminal may measure the received power of the first radio frequency signal and determine whether the received power of the first radio frequency signal meets the expected received power of the terminal. If the received power of the first radio frequency signal meets the expected received power of the terminal, the terminal does not need to send the third indication information to the first network device; if the received power of the first radio frequency signal does not meet the expected received power of the terminal, the terminal may The first network device sends third indication information.
  • the third instruction information is used to request the first network device to adjust the transmission power of the first radio frequency signal
  • the third instruction information is used to request the first network device to increase the transmission power of the first radio frequency signal
  • the third indication information is used to request the first network device to reduce the transmission power of the first radio frequency signal.
  • the third indication information may include an adjustment amount of the transmission power of the first radio frequency signal, and the adjustment amount may be determined by the terminal based on the expected reception power and the reception power of the first radio frequency signal.
  • the terminal may send third indication information to the first network device, and the third indication information is used to request the first network device to increase the transmit power of the first radio frequency signal;
  • the adjustment amount may be an increase in the transmission power of the first radio frequency signal.
  • the terminal can send third instruction information to the first network device, and the third instruction information instructs the first network device to reduce the transmission power of the first radio frequency signal; this In this case, the adjustment amount may be the reduction amount of the transmission power of the first radio frequency signal.
  • the first network device may send fourth indication information, and the fourth indication information is used to indicate that the first network device has reached the maximum transmission power; for example, when the first network device determines that the maximum transmission power has been reached,
  • the fourth indication information may be sent in a unicast, broadcast or multicast manner.
  • the terminal may no longer send the third indication information to the first network device to request the first network device to increase the transmission power of the first radio frequency signal. Transmit power, thereby reducing invalid signaling transmission and effectively saving signaling overhead.
  • the terminal can send third indication information to the first network device, where the third indication information includes terminal measurements.
  • the received power of the first radio frequency signal furthermore, after receiving the third indication information, the first network device can determine a specific adjustment amount according to the received power of the first radio frequency signal, and then adjust the transmission power of the first radio frequency signal according to the adjustment amount.
  • the first network device may determine the specific adjustment amount based on the received power of the first radio frequency signal in a variety of ways, for example, if the received power of the first radio frequency signal is less than the received power of the first radio frequency signal estimated by the first network device , then the first network device may determine the adjustment amount (the adjustment amount may be greater than or equal to the difference) based on the difference between the received power of the first radio frequency signal estimated by the first network device and the received power of the first radio frequency signal.
  • the terminal can send the third instruction information to the first network device, and then the first network device dynamically adjusts the transmit power of the first radio frequency signal according to the third instruction information to ensure that the received power of the first radio frequency signal meets the requirements of the terminal. Desired received power.
  • the terminal indicates the expected received power to the first network device, and the first network device can negotiate with the second network device to transmit energy to the terminal device in a coordinated manner based on the expected received power.
  • Figure 7 is a schematic flowchart corresponding to the energy collection method provided in Embodiment 2 of the present application. As shown in Figure 7, the method may include:
  • the terminal sends first indication information to the first network device.
  • the first indication information indicates the expected received power of the radio frequency signal used by the terminal to collect energy; accordingly, the first network device receives the first indication information.
  • S701 may refer to the description of S601 in Embodiment 1.
  • the first network device sends a collaboration request message to the second network device.
  • the collaboration request message is used to request the second network device and the first network device to transmit energy to the same terminal in a collaborative manner.
  • the cooperation request message is used to request the second network device to send a second radio frequency signal to the terminal, and the second radio frequency signal is used for the terminal to collect energy.
  • the cooperation request message includes the first received power, and the first received power is used to determine the transmit power of the second radio frequency signal.
  • the cooperation request message may also include other possible information, such as the identification of the object (that is, the terminal) that transmits energy.
  • terminal refers to the same terminal unless otherwise specified.
  • the second network device sends a collaboration response message to the first network device.
  • the collaboration response message is used to instruct the second network device to accept the collaboration request of the first network device.
  • the first network device is a serving network device of the terminal
  • the second network device is an adjacent network device of the first network device.
  • the second network device may also be a service network device of the terminal.
  • the terminal may be connected to the first network device and the second network device in a dual connection manner.
  • the first network device can be the primary network device and the second network device can be the secondary network device.
  • dual connection refers to dual connection for transmitting energy. That is to say, the connection between the first network device and the terminal can be used for the first network device to transmit energy to the terminal, and can also be used for the first network device to transmit energy to the terminal.
  • the connection between the second network device and the terminal may be used for the second network device to transmit energy to the terminal, or may be used for the second network device to transmit data to the terminal, or may not be used for the second network device to transmit data to the terminal.
  • the first network device may determine whether collaborative energy transmission is required. If collaborative energy transmission is required, a collaborative request message may be sent to the second network device; if collaborative energy transmission is not required, the first network device may Execute S602 in Embodiment 1.
  • the first network device can determine whether the expected receive power can be met based on the expected receive power. If the expected receive power cannot be met (for example, when the first network device transmits the first radio frequency signal according to the maximum transmit power, the first radio frequency signal If the received power reaching the terminal is still less than the expected received power), it is determined that coordinated energy transmission is required; if the expected received power can be met, the first network device can further combine other possible information (such as the quality of service requirements for transmitting energy to the terminal, See description below) to determine whether coordinated energy transfer is required.
  • the expected receive power cannot be met (for example, when the first network device transmits the first radio frequency signal according to the maximum transmit power, the first radio frequency signal If the received power reaching the terminal is still less than the expected received power)
  • the first network device can further combine other possible information (such as the quality of service requirements for transmitting energy to the terminal, See description below) to determine whether coordinated energy transfer is required.
  • cooperative energy transmission may include two situations: Scenario 1, the first network device cannot meet the expected received power; Scenario 2, the first network device can meet the expected received power.
  • Scenario 1 Synchronous collaborative energy transmission
  • the purpose of cooperative energy transmission may be: the received power of the first radio frequency signal and the received power of the second radio frequency signal are superimposed to meet the expected received power of the terminal.
  • the waveform of the first radio frequency signal and the waveform of the second radio frequency signal are the same, and the time-frequency resource carrying the first radio frequency signal and the time-frequency resource carrying the second radio frequency signal are the same (in the embodiment of this application, it refers to the time-frequency resource carrying the first radio frequency signal). From the perspective of the terminal, the time-frequency resource carrying the first radio frequency signal and the time-frequency resource carrying the second radio frequency signal are the same).
  • the first network device sends a first radio frequency signal to the terminal (the first radio frequency signal includes multiple peaks, including peak 1)
  • the second network device sends a second radio frequency signal to the terminal (the second radio frequency signal includes multiple peaks).
  • Wave peaks, including wave peak 2) the time when wave peak 1 and wave peak 2 arrive at the terminal can be synchronized, and then the amplitude of the waveform of the first radio frequency signal and the amplitude of the waveform of the second radio frequency signal can be superimposed into a larger
  • the amplitude that is, the received power of the first radio frequency signal and the received power of the second radio frequency signal can be superimposed into a larger received power, or the first DC signal (the DC signal obtained by converting the first radio frequency signal by the terminal)
  • the power and the power of the second DC signal (the DC signal obtained by converting the second radio frequency signal by the terminal) can be superimposed into a larger power.
  • This type of collaborative energy transfer can be called synchronous collaborative energy transfer. For example, when the first network device cannot meet the
  • the propagation delay between the first network device and the terminal is T1
  • the sending time of wave peak 1 is t1a
  • the time when wave peak 1 reaches the terminal is t1b
  • the propagation delay between the second network device and the terminal is T2
  • the sending time of wave peak 2 is t2a
  • the time when wave peak 2 reaches the terminal is t2b
  • the starting time for the first network device to send the first radio frequency signal is the same as the starting time for the second network device to send the second radio frequency signal, but the initial phase of the first radio frequency signal and the initial phase of the second radio frequency signal are different, so that t1a can be made different from t2a; or, the initial phase of the first radio frequency signal and the initial phase of the first radio frequency signal are the same, but the starting time of the first network device sending the first radio frequency signal and the second network device sending the second The starting times of the two radio frequency signals are different, which can make t1a different from t2a.
  • the first network device after the first network device determines that it cannot meet the expected received power, it can determine the transmit power of the first radio frequency signal and determine the bearer of the first radio frequency based on the actual capabilities of the first network device. time-frequency resources of the signal, and estimate the received power of the first radio frequency signal.
  • the first network device may estimate the received power of the first radio frequency signal based on the transmit power of the first radio frequency signal and the path loss between the first network device and the terminal. For the path loss between the first network device and the terminal, reference may be made to the description in Embodiment 1.
  • the first network device determines the first reception power based on the expected reception power and the reception power of the first radio frequency signal estimated by the first network device, and sends a cooperation request message to the second network device.
  • the collaboration request message may include the first received power, and optionally may also include waveform information of the first radio frequency signal and/or information of the first time-frequency resource.
  • the waveform information of the first radio frequency signal is used for the second network device to determine The waveform of the second radio frequency signal, the first time frequency resource is used to carry the second radio frequency signal, and the time frequency resource carrying the second radio frequency signal is the same as the time frequency resource carrying the first radio frequency signal.
  • the first network device determines the first received power based on the expected received power and the received power of the first radio frequency signal estimated by the first network device, which may mean: the first network device subtracts the estimated received power from the expected received power.
  • the received power of the first radio frequency signal is obtained to obtain the first received power. For example, when the unit of received power is watt (w), the expected received power is [X1, X2], and the estimated received power of the first radio frequency signal is Y, then the first received power can be [X1-Y, X2- Y].
  • the first indication information indicates that the waveform expected by the terminal includes one waveform (such as waveform 3), then the above-mentioned expected received power is the expected received power corresponding to waveform 3, and the waveform information of the first radio frequency signal is the waveform. 3 corresponding waveform information.
  • the first network device can select a target waveform from the multiple waveforms; for example, the selected target waveform is waveform 3, then the above-mentioned expected received power is the target waveform.
  • the waveform information of the first radio frequency signal is the waveform information corresponding to the target waveform.
  • the second network device may determine the transmit power of the second radio frequency signal based on the first received power and the path loss between the second network device and the terminal.
  • the second network device determines the path loss between the second network device and the terminal.
  • the second network device when the second network device is the service network device of the terminal, the second network device can send the second reference signal to the terminal.
  • the terminal can receive the second reference signal and measure the second reference signal to obtain the second reference signal.
  • the received power of the second reference signal is then sent to the second network device; furthermore, the second network device can obtain the second network device based on the transmit power of the second reference signal and the received power of the second reference signal. Path loss between device and terminal.
  • the second network device when the second network device is not the serving network device of the terminal, the second network device can broadcast the second reference signal, and accordingly, the terminal can receive the second reference signal (since the second network device is a relative of the first network device) adjacent network equipment, therefore, the terminal can receive the second reference signal), measure the second reference signal, obtain the received power of the second reference signal, and then send the received power of the second reference signal to the first network device.
  • the first network device may send the received power of the second reference signal to the second network device.
  • the first network device may send the received power of the second reference signal to the second network device through a collaboration request message (i.e., collaboration request message).
  • the request message may also include the received power of the second reference signal).
  • the second network device can obtain the path loss between the second network device and the terminal based on the transmit power of the second reference signal and the received power of the second reference signal. .
  • the second network device can send a collaboration failure message to the first network device.
  • the collaboration failure message can include the second received power, and the second received power is the estimated power of the second network device.
  • the second network device if the second network device determines that the adjusted first receiving power can be satisfied, may send a collaborative response message to the first network device. That is to say, the first network device and the second network device can meet the expected receiving power of the terminal through negotiation.
  • the embodiment of the present application does not limit the specific process of negotiation.
  • the purpose of cooperative energy transmission may be: the first network device and the second network device independently transmit power to the terminal, so as to transmit more power to the terminal.
  • the waveform of the first radio frequency signal and the waveform of the second radio frequency signal may be the same or different; the time domain resources carrying the first radio frequency signal and the time domain resources carrying the second radio frequency signal are different, and the frequency domain resources Can be the same or different.
  • the first network device sends a first radio frequency signal to the terminal (the first radio frequency signal includes multiple peaks, including peak 1)
  • the second network device sends a second radio frequency signal to the terminal (the second radio frequency signal includes multiple peaks).
  • the arrival time of wave peak 1 and wave peak 2 at the terminal may be asynchronous.
  • This type of collaborative energy transfer can be called asynchronous collaborative energy transfer. For example, when the first network device can meet the expected received power of the terminal, the first network device requests the second network device to perform asynchronous coordinated energy transmission.
  • the first network device may determine that the waveform of the first radio frequency signal is the waveform. 3. Determine the transmit power of the first radio frequency signal according to the expected received power corresponding to waveform 3; and send a collaboration request message to the second network device.
  • the collaboration request message may include the waveform information corresponding to waveform 3 and the waveform information corresponding to waveform 3. Expected received power, the first received power is the expected received power corresponding to waveform 3.
  • the second network device can determine the transmission power of the second radio frequency signal according to the expected reception power corresponding to waveform 3, and determine the transmission power of the second radio frequency signal according to the waveform information corresponding to waveform 3. waveform.
  • the method in which the second network device determines the transmit power of the second radio frequency signal based on the expected received power may refer to the method "the first network device may determine the transmit power of the first radio frequency signal based on the expected received power" in Embodiment 1.
  • the first network device may select a target waveform from the multiple waveforms (for example, the selected target waveform is Waveform 3), and determine that the waveform of the first radio frequency signal is waveform 3, and determine the transmission power of the first radio frequency signal according to the expected received power corresponding to waveform 3; in addition, the first network device can send a coordinated message to the second network device Request message, the cooperation request message may include waveform information corresponding to multiple waveforms and expected received power corresponding to multiple waveforms, and the first received power includes expected received power corresponding to multiple waveforms.
  • the second network device can select a target waveform from multiple waveforms (for example, the selected waveform is waveform 2), and determine that the waveform of the second radio frequency signal is the waveform. 2. Determine the transmit power of the second radio frequency signal according to the expected received power corresponding to the target waveform.
  • the specific manner in which the second network device selects a target waveform from multiple waveforms may depend on the internal implementation of the second network device.
  • the target waveform selected by the second network device and the target waveform selected by the first network device may be the same or different.
  • the cooperation response message includes information of the second time-frequency resource, and the second time-frequency resource is used to carry the second radio frequency signal.
  • the collaboration request message includes the first received power, and the second network device determines the transmit power of the second radio frequency signal based on the first received power
  • the first network device can estimate the transmit power of the second radio frequency signal based on the first received power.
  • the collaboration request message may include the estimated transmit power (excluding the first receive power), so that the second network device can determine the transmit power of the second radio frequency signal based on the estimated transmit power (for example, the second network device directly transmits the estimated transmit power The transmission power is used as the transmission power of the second radio frequency signal).
  • the above S703 is described by taking the second network device accepting the collaboration request of the first network device as an example.
  • the second network device may also reject the collaboration request of the first network device. There may be multiple reasons why the second network device rejects the collaboration request of the first network device, which is not limited in this embodiment of the present application. If the second network device rejects the collaboration request of the first network device, the first network device may send a collaboration request message to the third network device to request the third network device to collaboratively transmit energy, or the first network device may no longer Request other network devices to cooperate in transmitting energy.
  • the first network device sends second indication information to the terminal; accordingly, the terminal can receive the second indication information.
  • the second indication information may indicate at least one of the following: a time-frequency resource carrying the first radio frequency signal; and a starting time for the first network device to send the first radio frequency signal to the terminal.
  • the second indication information may indicate at least one of the following: time-frequency resources carrying the first radio frequency signal; time-frequency resources carrying the second radio frequency signal; and the start of the first network device sending the first radio frequency signal to the terminal.
  • the starting time the starting time when the second network device sends the second radio frequency signal to the terminal.
  • the second indication information may indicate the time-frequency resource carrying the second radio frequency signal and/or the starting time for the second network device to send the second radio frequency signal to the terminal.
  • the terminal after it is determined that it does not need to receive the first radio frequency signal and the second radio frequency signal, it can be in the sleep state; when it is determined that it needs to receive the first radio frequency signal or the second radio frequency signal, it can be in the sleep state. Wake up in the state to receive the first radio frequency signal or the second radio frequency signal, thereby saving energy consumption of the terminal.
  • the first network device sends the first radio frequency signal; accordingly, the terminal receives the first radio frequency signal.
  • the second network device sends a second radio frequency signal; accordingly, the terminal receives the second radio frequency signal.
  • the peak of the first radio frequency signal (Peak 1) and the peak of the second radio frequency signal (such as wave peak 2) arrive at the terminal at the same time. Therefore, the received power of the first radio frequency signal and the received power of the second radio frequency signal can be superimposed into a larger received power. , and then the terminal can convert the first radio frequency signal and the second radio frequency signal into DC power based on greater received power, and store them.
  • This implementation can be understood as radio frequency superposition.
  • the terminal can respectively convert the first radio frequency signal into a first DC signal, convert the second radio frequency signal into a second DC signal, and then superimpose the power of the first DC signal and the power of the second DC signal into one Greater power, DC power is obtained.
  • This implementation can be understood as DC superposition.
  • the terminal can convert the first radio frequency signal into DC power and store it; and the terminal receives the second radio frequency signal. After receiving the signal, the second radio frequency signal can be converted into direct current energy and stored. In this case, no RF superposition or DC superposition is performed.
  • the terminal can indicate the expected received power to the first network device through the first indication information, and then when the first network device cannot meet the expected received power, the first network device and the second network device can cooperate to meet the expected received power.
  • the expected received power of the terminal so as to meet the energy harvesting needs of the terminal.
  • the conversion rate corresponding to the expected received power of the terminal may be greater than or equal to the conversion rate threshold. Therefore, when the first network device determines the transmit power of the first radio frequency signal according to the expected received power of the terminal, it is easy to ensure the reception of the first radio frequency signal.
  • the power meets the expected receiving power of the terminal, and the terminal's conversion rate of converting the first radio frequency signal into electrical energy is greater than or equal to the conversion rate threshold, so that the terminal's conversion rate of converting the first radio frequency signal into electrical energy is relatively high and can reduce the number of steps in the conversion process. energy loss and improve the energy transfer efficiency of wireless power transmission.
  • the above method may also include:
  • the terminal continuously monitors at least one of the following: the received power of the first reference signal, the received power of the second reference signal, the received power of the first radio frequency signal, and the received power of the second radio frequency signal, and can report the monitoring results to the first network equipment (or, when the second network equipment is the service network equipment of the terminal, the monitoring results can also be reported to the second network equipment), so that the first network equipment can dynamically adjust the transmission power of the first radio frequency signal and/or the The second network device can dynamically adjust the transmission power of the second radio frequency signal to ensure that the reception power of the first radio frequency signal meets the expected reception power of the terminal.
  • the first network device after receiving the monitoring result of the terminal, can update the transmit power and the first receive power of the first radio frequency signal, and send a cooperative energy transmission update request message to the second network device.
  • the cooperative energy transmission update request message includes The updated first received power; accordingly, after receiving the cooperative transmission update request message, the second network device can update the transmit power of the second radio frequency signal according to the updated first received power.
  • the first network device may transmit the first radio frequency signal according to the updated transmission power of the first radio frequency signal
  • the second network device may transmit the second radio frequency signal according to the updated transmission power of the second radio frequency signal.
  • the first network device can Send an energy transfer request message to the second network device.
  • the energy transfer request message is used to request the second network device to transmit energy to the terminal; in this case, the first network device does not transmit energy to the terminal.
  • the energy transfer request message may be sent to the second network device.
  • the energy transmission request message may include the expected received power, and may also include other possible information, such as the identification of the object (that is, the terminal) transmitting energy.
  • the identification of the object that is, the terminal transmitting energy.
  • the first network device sends transmission energy to the terminal device according to parameters for transmitting energy to the terminal.
  • Figure 8 is a schematic flow chart corresponding to the energy collection method provided in Embodiment 3 of the present application. As shown in Figure 8, the method includes:
  • the first network device obtains first configuration information.
  • the first configuration information includes parameters for transmitting energy to the terminal.
  • the first network device may obtain the first configuration information in multiple ways.
  • the first network device may obtain the first configuration information from the terminal or the core network device.
  • the first configuration information may be determined based on the subscription information of the terminal.
  • the parameters for transmitting energy to the terminal may include at least one of the following:
  • the second time period and the received energy value expected by the terminal during the second time period For example, if the second time period is 1 second (s), and the energy value expected to be received by the terminal during the second time is 0.5J, it means that at least 0.5J of electric energy needs to be transmitted to the terminal within 1s.
  • the above “second time period and the received energy value expected by the terminal in the second time period” can also be replaced by "the energy value expected to be received by the terminal and the shortest delay".
  • the energy value expected to be received by the terminal is 0.5J and the minimum delay is 1s, it means that the time required to transmit 0.5J of electric energy to the terminal does not exceed 1s, that is, within 1s, at least 0.5J of electric energy needs to be transmitted to the terminal. electrical energy.
  • the shortest delay (or the second time period) may be called the energy transmission delay budget of the terminal.
  • Transmission priority (for the convenience of distinction, it is called the first transmission priority here), that is, the priority of sending radio frequency signals to the terminal.
  • the first transmission priority For example, different terminals may have different energy transmission priorities. If the terminal has a high energy transmission priority, the first network device may send radio frequency signals to the terminal first.
  • the parameters for transmitting energy to the terminal include one of the above-mentioned items (1) and (2)
  • the parameters for transmitting energy to the terminal may also include the above-mentioned items (3) and/or (4).
  • the first network device sends a first radio frequency signal to the terminal according to the first configuration information.
  • the first radio frequency signal is used by the terminal to collect energy.
  • the first network device can determine at least one of the waveform of the first radio frequency signal, the transmission power of the first radio frequency signal, and the time-frequency resource carrying the first radio frequency signal based on the first configuration information. One item, and then sending a first radio frequency signal to the terminal.
  • the first configuration information includes the first time period and the ratio. Taking “the first time period is 10 time slots and the ratio is 3/5" as an example, the first network device can determine based on the first time period and the ratio. Time-frequency resources carrying the first radio frequency signal to ensure that the first radio frequency signal is sent to the terminal on at least 6 time slots out of every 10 time slots.
  • the first configuration information includes the second time period and the energy value. Taking “the second time period is 1s and the energy value is 0.5J" as an example, since the electric energy transmitted by the first network device to the terminal in the second time period is different from The waveform of the first radio frequency signal and the transmission power of the first radio frequency signal are related to the time-frequency resources carrying the first radio frequency signal. Therefore, the first network device can determine the waveform of the first radio frequency signal according to the second time period and the energy value. The transmission power of the first radio frequency signal and the time-frequency resource carrying the first radio frequency signal are used to ensure that at least 0.5 J of power is transmitted to the terminal within 1 second.
  • the first configuration information includes the priority of sending the first radio frequency signal to the terminal. Since the priorities of different terminals may be different, in a scenario where transmission resources are limited, the network device can prioritize ensuring the priority. High terminal energy transfer.
  • the first network device may send second indication information to the terminal.
  • second indication information please refer to the description of the second indication information in S602.
  • the first network device since the first network device sends the first radio frequency signal to the terminal according to the first configuration information, it is easy to meet the energy collection requirements of the terminal and can transmit energy to different terminals in a more targeted manner.
  • the first network device negotiates with the second network device to transmit energy to the terminal device in a coordinated manner based on parameters for transmitting energy to the terminal.
  • Figure 9 is a schematic flow chart corresponding to the energy collection method provided in Embodiment 4 of the present application. As shown in Figure 9, the method includes:
  • the first network device obtains first configuration information.
  • the first configuration information includes parameters for transmitting energy to the terminal.
  • S901 may refer to the description of S801 in Embodiment 3.
  • the first network device sends a collaboration request message to the second network device according to the first configuration information.
  • the collaboration request message is used to request the second network device to send a second radio frequency signal to the terminal.
  • the second radio frequency signal is used for the terminal to collect energy.
  • the second network device sends a collaboration response message to the first network device.
  • the collaboration response message is used to instruct the second network device to accept the collaboration request of the first network device.
  • the first network device may determine whether the first configuration information can be satisfied based on the first configuration information. If the first configuration information can be satisfied, it may be determined that collaborative energy transmission is not required, and then perform S802 in Embodiment 3. ; If the first configuration information cannot be satisfied, it may be determined that collaborative energy transmission is required, and a collaboration request message may be sent to the second network device.
  • the collaboration request message may include the second configuration information, and the second configuration information may include the requirements for sending the second radio frequency signal. Satisfied parameters (or parameters corresponding to sending the second radio frequency signal).
  • the second configuration information or the parameters that need to be met to send the second radio frequency signal may include at least one of the following:
  • the third time period may be less than the first time period, and/or the ratio 2 may be less than the ratio 1.
  • Ratio 2 is the ratio of the shortest duration of sending radio frequency signals to the terminal in the third time period to the third time period
  • ratio 1 is the ratio of the shortest duration of sending radio frequency signals to the terminal in the first time period to the first time period.
  • the fourth time period and the received energy value expected by the terminal during the fourth time period may be smaller than the second time period, and/or the energy value 2 may be smaller than the energy value 1.
  • Energy value 2 is the received energy value expected by the terminal in the fourth time period
  • energy value 1 is the received energy value expected by the terminal in the second time period.
  • the second energy transmission priority, the second energy transmission priority is equal to the first energy transmission priority.
  • the second configuration information may be determined by the first network device based on the first configuration information and the parameters that the first network device estimates can be satisfied when sending the first radio frequency signal (or in other words, the parameters corresponding to sending the first radio frequency signal).
  • the parameters indicated by the first configuration information include: a second time period (such as 1 s) and a received energy value expected by the terminal in the second time period (such as 0.5 J).
  • a second time period such as 1 s
  • a received energy value expected by the terminal in the second time period such as 0.5 J.
  • the parameters indicated by the first configuration information include: the second time period (such as 1s) and the received energy value expected by the terminal in the second time period (such as 0.5J)" as an example,
  • the first network device determines that it cannot satisfy the first configuration information, it can determine the transmission power of the first radio frequency signal and the time-frequency resource carrying the first radio frequency signal based on the actual capability of the first network device, and estimate the time and frequency resources for carrying the first radio frequency signal within 1 second.
  • the energy value that a network device can transmit to the terminal is determined based on the parameters indicated by the first configuration information and the energy value estimated by the first network device.
  • the second configuration information may include the second time period and the first energy value. Energy value. For example, if the first network device estimates that the energy value that the first network device can transmit to the terminal within 1 second is 0.3J, then the first energy value may be greater than or equal to 0.2J.
  • the second network device can determine the waveform of the second radio frequency signal, the transmission power of the second radio frequency signal and the time frequency carrying the second radio frequency signal according to the second time period and the first energy value. at least one of the resources, and sends a collaborative response message to the first network device.
  • the collaboration response message may also include third time-frequency resource information, where the third time-frequency resource information is used to indicate the time-frequency resource carrying the second radio frequency signal.
  • the above S903 is described by taking the second network device accepting the collaboration request of the first network device as an example.
  • the second network device may also reject the collaboration request of the first network device. There may be multiple reasons why the second network device rejects the collaboration request of the first network device, which is not limited in this embodiment of the present application. If the second network device rejects the collaboration request of the first network device, the first network device may send a collaboration request message to the third network device to request the third network device to collaboratively transmit energy, or the first network device may no longer Request other network devices to cooperate in transmitting energy.
  • S904 The first network device sends indication information to the terminal; accordingly, the terminal can receive the indication information.
  • the indication information may indicate at least one of the following: a time-frequency resource carrying the first radio frequency signal; a time-frequency resource carrying the second radio frequency signal; a starting time for the first network device to send the first radio frequency signal to the terminal; The starting time when the second network device sends the second radio frequency signal to the terminal.
  • the indication information may indicate the time-frequency resource carrying the second radio frequency signal and/or the starting time for the second network device to send the second radio frequency signal to the terminal.
  • the first network device sends the first radio frequency signal; accordingly, the terminal receives the first radio frequency signal.
  • the second network device sends a second radio frequency signal; accordingly, the terminal receives the second radio frequency signal.
  • the implementation of converting the first radio frequency signal and the second radio frequency signal into DC power may refer to the description in Embodiment 2.
  • the first network device and the second network device can cooperate to meet the first configuration information of the terminal, thereby conveniently meeting the energy collection requirements of the terminal, and transmitting energy to different terminals in a more targeted manner.
  • the network device is taken as a whole, and the possible implementation process is described from the perspective of communication between the network device and the terminal.
  • the network device may include a CU and one or more DUs.
  • the following takes the collaborative energy transmission scenario described in Embodiment 2 as an example.
  • Embodiment 5 from the perspective of CU, DU and terminal communication, Describe another possible implementation process of collaborative energy transfer.
  • Embodiment 5 focuses on describing the differences from Embodiment 2, and some specific implementations may refer to Embodiment 2.
  • Figure 10 is a schematic flow chart corresponding to the energy collection method provided in Embodiment 5 of the present application. As shown in Figure 10, the method includes:
  • the terminal sends first indication information to the CU.
  • the first indication information indicates the expected received power of the radio frequency signal used by the terminal to collect energy; accordingly, the CU receives the first indication information.
  • the terminal may send the first indication information to the CU through RRC signaling.
  • the terminal may also send the first indication information to the first DU through MAC layer signaling or physical layer signaling, and then the first DU sends the first indication information to the CU.
  • the CU sends a request message to the first DU.
  • the request message is used to request the first DU to send a first radio frequency signal to the terminal.
  • the first radio frequency signal is used for the terminal to collect energy.
  • the first DU is the service DU of the terminal, and the second DU and the first DU below are different DUs managed by the same CU.
  • the second DU may also be a service DU of the terminal.
  • the first DU After receiving the request message, the first DU sends a response message to the CU.
  • the request message may include the expected received power, and then the first DU may determine whether the expected received power can be satisfied based on the expected received power.
  • the first DU may determine the transmission power of the first radio frequency signal and the time-frequency resource carrying the first radio frequency signal based on the actual capability of the first DU, and send a response message to the CU, where the response message may include the first radio frequency signal. Time-frequency resource information and first received power.
  • the response message is used to indicate that the first DU cannot meet the expected received power and needs to perform coordinated energy transmission
  • the first time-frequency resource is used to carry the second radio frequency signal
  • the first received power is used to determine the transmit power of the second radio frequency signal
  • the first received power may be determined by the first DU based on the expected received power and the received power of the first radio frequency signal estimated by the first DU.
  • the response message may also include information about the first time-frequency resource and the received power of the first radio frequency signal estimated by the first DU. Then, after receiving the response message, the CU may A DU estimates the received power of the first radio frequency signal and the expected received power to determine the first received power.
  • the first DU may determine the transmit power of the first radio frequency signal based on the expected received power and send it to the CU. Respond to the message. The response message is used to indicate that the first DU can meet the expected received power and needs to perform coordinated energy transmission.
  • the CU sends a collaboration request message to the second DU.
  • the collaboration request message is used to request the second DU to send a second radio frequency signal to the terminal.
  • the second radio frequency signal is used for the terminal to collect energy.
  • the cooperation request message may include the first reception power.
  • the first received power may be determined by the first DU based on the expected received power and the received power of the first radio frequency signal estimated by the first DU; for case 2, the first received power may be the expected received power.
  • the collaboration request message may also include other possible information. Please refer to Embodiment 2 for details.
  • the first DU sends the first radio frequency signal; accordingly, the terminal receives the first radio frequency signal.
  • the second DU sends a second radio frequency signal; accordingly, the terminal receives the second radio frequency signal.
  • Embodiment 1 can be combined with Embodiment 3.
  • the first network device can determine the desired received power according to the expected received power and the first configuration information. Determine the transmission power of the first radio frequency signal and the time-frequency resource carrying the first radio frequency signal.
  • Embodiments 1 to 5 can be referred to each other; in addition, in the same embodiment, , different implementations or different examples can also be cross-referenced.
  • the message A includes B may mean that the message A includes B itself, or it may also mean that the message A includes information indicating B; for example, ""The cooperation request message includes the first received power” may refer to: The cooperation request message includes the first received power, or may also mean that the cooperation request message includes information indicating the first received power.
  • the terminal reports C to the network device it may mean that the terminal reports C itself to the network device, or it may also mean that the terminal reports to the network device information indicating C; for example, the terminal reports to the network device the reference
  • the received power of the signal may mean that the terminal reports the received power of the reference signal itself to the network device, or it may also refer that the terminal reports to the network device information indicating the received power of the reference signal.
  • the first network device, the second network device and the terminal may include corresponding hardware structures and/or software modules for performing respective functions.
  • the embodiments of the present application can be implemented in the form of hardware or a combination of hardware and computer software. Whether a function is performed by hardware or computer software driving the hardware depends on the specific application and design constraints of the technical solution. Skilled artisans may implement the described functionality using different methods for each specific application, but such implementations should not be considered beyond the scope of this application.
  • Embodiments of the present application can divide the first network device, the second network device and the terminal into functional units according to the above method examples.
  • each functional unit can be divided corresponding to each function, or two or more functions can be integrated. in a unit.
  • the above integrated units can be implemented in the form of hardware or software functional units.
  • Figure 11 shows a possible exemplary block diagram of the device involved in the embodiment of the present application.
  • the device 1100 may include: a processing unit 1102 and a communication unit 1103.
  • the processing unit 1102 is used to control and manage the actions of the device 1100 .
  • the communication unit 1103 is used to support communication between the device 1100 and other devices.
  • the communication unit 1103, also called a transceiver unit may include a receiving unit and/or a sending unit, respectively configured to perform receiving and sending operations.
  • the device 1100 may also include a storage unit 1101 for storing program codes and/or data of the device 1100 .
  • the device 1100 may be the first network device in the above embodiment.
  • the processing unit 1102 can support the apparatus 1100 to perform the actions of the first network device in each of the above method examples.
  • the processing unit 1102 mainly performs internal actions of the first network device in the method example, and the communication unit 1103 may support communication between the device 1100 and other devices.
  • the communication unit 1103 is configured to: receive first indication information from the terminal, the first indication information indicating the expected received power of the radio frequency signal used for the terminal to collect energy; and, to the The terminal sends a first radio frequency signal, the transmission power of the first radio frequency signal is determined according to the expected received power, and the first radio frequency signal is used by the terminal to collect energy.
  • the device 1100 may be the second network device in the above embodiment.
  • the processing unit 1102 can support the apparatus 1100 to perform the actions of the second network device in the above method examples.
  • the processing unit 1102 mainly performs internal actions of the second network device in the method example, and the communication unit 1103 may support communication between the device 1100 and other devices.
  • the communication unit 1103 is configured to: receive a collaboration request message from a first network device, where the collaboration request message includes the first receiving power; and send a second radio frequency signal to the terminal according to the collaboration request message. , the transmitting power of the second radio frequency signal is determined based on the first receiving power, and the second radio frequency signal is used for the terminal to collect energy.
  • the device 1100 may be the terminal in the above embodiment.
  • the processing unit 1102 can support the device 1100 to perform the actions of the terminal in each of the above method examples.
  • the processing unit 1102 mainly performs internal actions of the terminal in the method example, and the communication unit 1103 may support communication between the device 1100 and other devices.
  • the communication unit 1103 is configured to: send first indication information to the first network device, the first indication information indicating the expected received power of the radio frequency signal used for the terminal to collect energy; and, receive A first radio frequency signal from the first network device, the transmission power of the first radio frequency signal is determined according to the expected received power, and the first radio frequency signal is used for the terminal to collect energy.
  • each unit in the device can be a separate processing element, or it can be integrated and implemented in a certain chip of the device.
  • it can also be stored in the memory in the form of a program, and a certain processing element of the device can call and execute the unit. Function.
  • all or part of these units can be integrated together or implemented independently.
  • the processing element described here can also be a processor, which can be an integrated circuit with signal processing capabilities.
  • each operation of the above method or each unit above can be implemented by an integrated logic circuit of hardware in the processor element or implemented in the form of software calling through the processing element.
  • the unit in any of the above devices may be one or more integrated circuits configured to implement the above method, for example: One or more application specific integrated circuits (ASICs), or one or more microprocessors (digital signal processors, DSPs), or one or more field programmable gate arrays (field programmable gate arrays, FPGA), or a combination of at least two of these integrated circuit forms.
  • ASICs application specific integrated circuits
  • DSPs digital signal processors
  • FPGA field programmable gate arrays
  • FPGA field programmable gate arrays
  • the unit in the device can be implemented in the form of a processing element scheduler
  • the processing element can be a processor, such as a general central processing unit (CPU), or other processors that can call programs.
  • these units can be integrated together and implemented in the form of a system-on-a-chip (SOC).
  • SOC system-on-a-chip
  • the above receiving unit is an interface circuit of the device and is used to receive signals from other devices.
  • the receiving unit is an interface circuit used by the chip to receive signals from other chips or devices.
  • the above unit used for sending is an interface circuit of the device and is used to send signals to other devices.
  • the sending unit is an interface circuit used by the chip to send signals to other chips or devices.
  • the terminal can be applied in the communication system shown in Figure 1 to implement the operations of the terminal in the above embodiment.
  • the terminal includes: an antenna 1210, a radio frequency part 1220, and a signal processing part 1230.
  • the antenna 1210 is connected to the radio frequency part 1220.
  • the radio frequency part 1220 receives the information sent by the network device through the antenna 1210, and sends the information sent by the network device to the signal processing part 1230 for processing.
  • the signal processing part 1230 processes the terminal information and sends it to the radio frequency part 1220.
  • the radio frequency part 1220 processes the terminal information and sends it to the network device through the antenna 1210.
  • the signal processing part 1230 may include a modulation and demodulation subsystem for processing each communication protocol layer of data; it may also include a central processing subsystem for processing the terminal operating system and application layer; in addition, it may also include Other subsystems, such as multimedia subsystem, peripheral subsystem, etc., where the multimedia subsystem is used to control the terminal camera, screen display, etc., and the peripheral subsystem is used to realize connections with other devices.
  • the modem subsystem can be a separately configured chip.
  • the modem subsystem may include one or more processing elements 1231, including, for example, a host CPU and other integrated circuits.
  • the modem subsystem may also include a storage element 1232 and an interface circuit 1233.
  • the storage element 1232 is used to store data and programs, but the program used to perform the method performed by the terminal in the above method may not be stored in the storage element 1232, but is stored in a memory outside the modem subsystem, using Used when the modem subsystem is loaded.
  • Interface circuit 1233 is used to communicate with other subsystems.
  • the modulation and demodulation subsystem can be implemented by a chip.
  • the chip includes at least one processing element and an interface circuit.
  • the processing element is used to perform various steps of any method performed by the above terminal, and the interface circuit is used to communicate with other devices.
  • the unit for the terminal to implement each step in the above method can be implemented in the form of a processing element scheduler.
  • the device for the terminal includes a processing element and a storage element, and the processing element calls the program stored in the storage element to execute the above The method executed by the terminal in the method embodiment.
  • the storage element may be a storage element on the same chip as the processing element, that is, an on-chip storage element.
  • the program for executing the method performed by the terminal in the above method may be in a storage element on a different chip from the processing element, that is, an off-chip storage element.
  • the processing element calls or loads the program from the off-chip storage element to the on-chip storage element to call and execute the method executed by the terminal in the above method embodiment.
  • the unit of the terminal that implements each step in the above method may be configured as one or more processing elements. These processing elements are provided on the modulation and demodulation subsystem.
  • the processing elements here may be integrated circuits, such as : One or more ASICs, or one or more DSPs, or one or more FPGAs, or a combination of these types of integrated circuits. These integrated circuits can be integrated together to form a chip.
  • the units of the terminal that implement each step in the above method can be integrated together and implemented in the form of a SOC.
  • the SOC chip is used to implement the above method.
  • the chip can integrate at least one processing element and a storage element, and the processing element calls the stored program of the storage element to implement the above terminal execution method; or, the chip can integrate at least one integrated circuit to implement the above terminal execution method. method; or, the above implementation methods can be combined, and the functions of some units are realized in the form of processing components calling programs, and the functions of some units are realized in the form of integrated circuits.
  • the above device for a terminal may include at least one processing element and an interface circuit, wherein at least one processing element is used to execute any method performed by the terminal provided in the above method embodiments.
  • the processing element can execute part or all of the steps executed by the terminal in the first way: that is, by calling the program stored in the storage element; or in the second way: that is, by combining the instructions with the integrated logic circuit of the hardware in the processor element. method to execute some or all of the steps executed by the terminal; of course, the first method and the second method can also be combined to execute some or all of the steps executed by the terminal.
  • the processing elements here are the same as described above and can be implemented by a processor.
  • the functions of the processing elements can be the same as the processing described in Figure 11.
  • the functionality of the units is the same.
  • the processing element may be a general-purpose processor, such as a CPU, or one or more integrated circuits configured to implement the above method, such as: one or more ASICs, or one or more microprocessors DSP , or, one or more FPGAs, etc., or a combination of at least two of these integrated circuit forms.
  • the storage element can be implemented by a memory, and the function of the storage element can be the same as the function of the storage unit described in FIG. 11 .
  • the storage element can be one memory or a collective name for multiple memories.
  • the terminal shown in Figure 12 can implement various processes involving the terminal in the above method embodiment.
  • the operations and/or functions of each module in the terminal shown in Figure 12 are respectively intended to implement the corresponding processes in the above method embodiment.
  • network device 130 may include one or more DUs 1301 and one or more CUs 1302.
  • the DU 1301 may include at least one antenna 13011, at least one radio frequency unit 13012, at least one processor 13013 and at least one memory 13014.
  • the DU 1301 part is mainly used for the transmission and reception of radio frequency signals, the conversion of radio frequency signals and baseband signals, and some baseband processing.
  • CU 1302 may include at least one processor 13022 and at least one memory 13021.
  • the CU 1302 part is mainly used for baseband processing, controlling network equipment, etc.
  • the DU 1301 and the CU 1302 can be physically set together or physically separated, that is, a distributed base station.
  • the CU 1302 is the control center of the network device, which can also be called a processing unit, and is mainly used to complete the baseband processing function.
  • the CU 1302 can be used to control the network device to perform the operation process of the network device in the above method embodiment.
  • the network device 130 may include one or more radio frequency units, one or more DUs, and one or more CUs.
  • the DU may include at least one processor 13013 and at least one memory 13014
  • the radio frequency unit may include at least one antenna 13011 and at least one radio frequency unit 13012
  • the CU may include at least one processor 13022 and at least one memory 13021.
  • the CU1302 can be composed of one or more single boards. Multiple single boards can jointly support a wireless access network (such as a 5G network) with a single access indication, or can respectively support wireless access networks of different access standards. Access network (such as LTE network, 5G network or other networks).
  • the memory 13021 and processor 13022 may serve one or more single boards. In other words, the memory and processor can be set independently on each board. It is also possible for multiple boards to share the same memory and processor. In addition, necessary circuits can also be installed on each board.
  • the DU1301 can be composed of one or more single boards.
  • Multiple single boards can jointly support a wireless access network with a single access indication (such as a 5G network), or can respectively support wireless access networks of different access standards (such as a 5G network).
  • a single access indication such as a 5G network
  • the memory 13014 and processor 13013 may serve one or more single boards. In other words, the memory and processor can be set independently on each board. It is also possible for multiple boards to share the same memory and processor. In addition, necessary circuits can also be installed on each board.
  • the network device shown in Figure 13 can implement various processes involving the network device in the above method embodiment.
  • the operations and/or functions of each module in the network device shown in Figure 13 are respectively intended to implement the corresponding processes in the above method embodiment.
  • embodiments of the present application may be provided as methods, systems, or computer program products. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment that combines software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) having computer-usable program code embodied therein.
  • computer-usable storage media including, but not limited to, disk storage, CD-ROM, optical storage, etc.
  • These computer program instructions may also be stored in a computer-readable memory that causes a computer or other programmable data processing apparatus to operate in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including the instruction means, the instructions
  • the device implements the functions specified in a process or processes of the flowchart and/or a block or blocks of the block diagram.
  • These computer program instructions may also be loaded onto a computer or other programmable data processing device, causing a series of operating steps to be performed on the computer or other programmable device to produce computer-implemented processing, thereby executing on the computer or other programmable device.
  • Instructions provide steps for implementing the functions specified in a process or processes of a flowchart diagram and/or a block or blocks of a block diagram.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Power Engineering (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

La présente demande concerne le domaine technique des communications. Sont divulgués un procédé et un appareil de collecte d'énergie. Le procédé consiste à : recevoir par un premier dispositif de réseau des premières informations d'indication en provenance d'un terminal, les premières informations d'indication étant utilisées pour indiquer une puissance de réception souhaitée d'un signal radiofréquence, qui est utilisé pour que le terminal collecte de l'énergie; et envoyer un premier signal radiofréquence au terminal, la puissance d'envoi du premier signal radiofréquence étant déterminée en fonction de la puissance de réception souhaitée et le premier signal radiofréquence étant utilisé pour que le terminal collecte de l'énergie. En utilisant le procédé, lors de la détermination de la puissance d'envoi d'un premier signal radiofréquence, un premier dispositif de réseau prend en considération l'exigence de collecte d'énergie d'un terminal (par exemple, une puissance de réception souhaitée du terminal), de telle sorte que l'exigence de collecte d'énergie du terminal peut être satisfaite.
PCT/CN2023/110627 2022-08-22 2023-08-01 Procédé et appareil de collecte d'énergie WO2024041333A1 (fr)

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Citations (4)

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Publication number Priority date Publication date Assignee Title
US20200321514A1 (en) * 2019-04-08 2020-10-08 Ramin Sadr Green energy harvesting methods for novel class of batteries and power supplies
US20210013750A1 (en) * 2018-03-07 2021-01-14 Telefonaktiebolaget Lm Ericsson (Publ) Technique for Wirelessly Charging a Wireless Device in a Wireless Communication System
CN113841317A (zh) * 2021-08-17 2021-12-24 北京小米移动软件有限公司 无线充电方法、装置、通信装置和计算机可读存储介质
US20220078790A1 (en) * 2020-09-07 2022-03-10 Korea Electronics Technology Institute Wireless cooperative charging system and method for increasing power receiving efficiency during simultaneous information and power transfer

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20210013750A1 (en) * 2018-03-07 2021-01-14 Telefonaktiebolaget Lm Ericsson (Publ) Technique for Wirelessly Charging a Wireless Device in a Wireless Communication System
US20200321514A1 (en) * 2019-04-08 2020-10-08 Ramin Sadr Green energy harvesting methods for novel class of batteries and power supplies
US20220078790A1 (en) * 2020-09-07 2022-03-10 Korea Electronics Technology Institute Wireless cooperative charging system and method for increasing power receiving efficiency during simultaneous information and power transfer
CN113841317A (zh) * 2021-08-17 2021-12-24 北京小米移动软件有限公司 无线充电方法、装置、通信装置和计算机可读存储介质

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