Power control method and device and storage medium

Abstract

The embodiment of the invention provides a power control method and device and a storage medium, and belongs to the technical field of communication. In the method, a first node can perform power control on a transmitting signal according to indication information and / or a backscattering signal, or the first node can receive the backscattering signal and send first information to network equipment, and the network equipment can perform power control on an excitation signal according to the first information. By controlling the power of the excitation signal, the decoding success rate of the backscattering signal can be improved.

Description

Technical Field

[0001] The present application belongs to the field of communication technology, and specifically relates to a power control method, device and storage medium. Background Art

[0002] Ambient Internet of Things (AIoT) aims to provide a low-power, low-complexity and low-cost IoT solution.

[0003] AIoT devices support communication by reflecting excitation signals sent by other devices. Among them, the excitation signal can also be called a carrier signal. In the proposed AIoT topology, the excitation signal can be sent by an intermediate node, an auxiliary node or a network device. After receiving the excitation signal, the AIoT device can reflect the excitation signal, and the reflected signal can be called a backscattered signal. Among them, the power of the excitation signal will affect the power of the backscattered signal, and then affect the decoding success rate of the backscattered signal. At present, there is no corresponding solution for how to achieve power control of the excitation signal. Summary of the invention

[0004] The present application relates to a power control method, device and storage medium, which can improve the decoding success rate of backscattered signals.

[0005] In a first aspect, an embodiment of the present application provides a power control method, including:

[0006] Power control is performed according to the indication information and / or the backscattered signal.

[0007] In a possible implementation, the method further includes:

[0008] The indication information and / or the backscattered signal is received.

[0009] In a possible implementation manner, performing power control according to the backscattered signal includes:

[0010] Power control is performed according to relevant parameters of the backscatter signal; the relevant parameters include at least one of the following: the received power of the backscatter signal, the energy of the backscatter signal, the integrity check result of the backscatter signal, and the decoding result of the backscatter signal.

[0011] In a possible implementation manner, performing power control according to relevant parameters of the backscatter signal includes:

[0012] If the relevant parameters of the backscatter signal include the received power, and the received power is less than or equal to the power threshold, performing power control;

[0013] If the relevant parameters of the backscatter signal include the energy, and the energy is less than or equal to the energy threshold, power control is performed;

[0014] If the relevant parameters of the backscatter signal include the integrity check result, and the integrity check result is a check failure, performing power control;

[0015] If the relevant parameters of the backscatter signal include the decoding result, and the decoding result is decoding failure, power control is performed.

[0016] In a possible implementation manner, performing power control according to the backscattered signal includes:

[0017] If the backscattered signal is not received within a preset period of time, power control is performed.

[0018] In a possible implementation manner, before receiving the indication information, the method further includes:

[0019] Sending first information, where the first information includes at least one of the following:

[0020] Indicative information of the backscatter signal reception status;

[0021] Instruction information for increasing the sending power of the excitation signal;

[0022] information of at least one backscatter device receiving the excitation signal;

[0023] Information of the backscattered signal received.

[0024] In a possible implementation manner, the indication information includes power control related information, and the power control related information includes at least one of the following:

[0025] Power limit information, power indication information, indication information allowing power control;

[0026] The power limit information is used to indicate the range of the power value after power control, and the power indication information is used to determine the power after power control.

[0027] In a possible implementation manner, the power limitation information includes a maximum transmit power and / or an initial transmit power; the power indication information includes one or more of a power ramp step, an absolute transmit power, an optional transmit power list, and a transmit power index value;

[0028] The optional transmission power list includes multiple transmission powers.

[0029] In a second aspect, an embodiment of the present application provides a power control method, including:

[0030] Sending first information, where the first information is obtained according to a backscattered signal, and the first information is used for power control.

[0031] In a possible implementation, the method further includes:

[0032] The backscattered signal is received.

[0033] In a possible implementation manner, the first information includes at least one of the following:

[0034] Indicative information of the backscatter signal reception status;

[0035] Instruction information for increasing the sending power of the excitation signal;

[0036] information of at least one backscatter device receiving the excitation signal;

[0037] Information of the backscattered signal received.

[0038] In a third aspect, an embodiment of the present application provides a power control method, including:

[0039] Send indication information, where the indication information is used for power control.

[0040] In a possible implementation manner, the sending indication information includes:

[0041] Receive first information, and send the indication information based on the first information.

[0042] In a possible implementation manner, the indication information includes power control related information, and the power control related information includes at least one of the following:

[0043] Power limit information, power indication information, indication information allowing power control;

[0044] The power limit information is used to indicate the range of the power value after power control, and the power indication information is used to determine the power after power control.

[0045] In a possible implementation manner, the power limitation information includes a maximum transmit power and / or an initial transmit power; the power indication information includes one or more of a power ramp step, an absolute transmit power, an optional transmit power list, and a transmit power index value;

[0046] The optional transmission power list includes multiple transmission powers.

[0047] In a possible implementation manner, the first information includes at least one of the following:

[0048] Indicative information of the backscatter signal reception status;

[0049] Instruction information for increasing the sending power of the excitation signal;

[0050] information of at least one backscatter device receiving the excitation signal;

[0051] Information of the backscattered signal received.

[0052] In a fourth aspect, an embodiment of the present application provides a power control method, including:

[0053] receiving first information, wherein the first information is obtained according to the backscattered signal;

[0054] Power control is performed based on the first information.

[0055] In a possible implementation manner, the first information includes at least one of the following:

[0056] Indicative information of the backscatter signal reception status;

[0057] Instruction information for increasing the sending power of the excitation signal;

[0058] information of at least one backscatter device receiving the excitation signal;

[0059] Information of the backscattered signal received.

[0060] In a fifth aspect, an embodiment of the present application provides a power control device, including:

[0061] The power control module is used to perform power control according to the indication information and / or the backscattered signal.

[0062] In a sixth aspect, an embodiment of the present application provides a power control device, including:

[0063] The sending module is used to send first information, where the first information is obtained according to a backscattered signal and is used for power control.

[0064] In a seventh aspect, an embodiment of the present application provides a power control device, including:

[0065] The sending module is used to send indication information, where the indication information is used for power control.

[0066] In an eighth aspect, an embodiment of the present application provides a power control device, including:

[0067] A receiving module, configured to receive first information, wherein the first information is obtained according to a backscattered signal;

[0068] A power control module is used to perform power control based on the first information.

[0069] In a ninth aspect, an embodiment of the present application provides a power control device, including: a processor and a memory;

[0070] The memory stores computer-executable instructions;

[0071] The processor executes the computer-executable instructions stored in the memory to implement the method described in the first aspect, the method described in the second aspect, the method described in the third aspect, or the method described in the fourth aspect.

[0072] In the tenth aspect, an embodiment of the present application provides a computer-readable storage medium, in which computer execution instructions are stored. When the computer execution instructions are executed by a processor, the method described in the first aspect, or the method described in the second aspect, or the method described in the third aspect, or the method described in the fourth aspect is implemented.

[0073] In the eleventh aspect, an embodiment of the present application provides a computer program product, including a computer program, which, when executed by a processor, implements the method described in the first aspect, or the method described in the second aspect, or the method described in the third aspect, or the method described in the fourth aspect.

[0074] In the twelfth aspect, an embodiment of the present application provides a chip having a computer program stored thereon. When the computer program is executed by the chip, the method described in the first aspect, or the method described in the second aspect, or the method described in the third aspect, or the method described in the fourth aspect is implemented.

[0075] In a possible implementation, the chip is a chip in a chip module.

[0076] In a thirteenth aspect, an embodiment of the present application provides a power control system, the power control system comprising:

[0077] The power control device according to the fifth aspect or the power control device according to the sixth aspect;

[0078] The power control device according to the seventh aspect or the power control device according to the eighth aspect;

[0079] Backscatter device.

[0080] The embodiment of the present application provides a power control method, device and storage medium, in which the first node can perform power control on the excitation signal according to the indication information and / or the backscatter signal, or the first node can receive the backscatter signal and send the first information to the network device, and the network device can perform power control on the excitation signal according to the first information. By controlling the power of the excitation signal, the decoding success rate of the backscatter signal can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0081] Figure 1 A schematic diagram of an application scenario provided for an embodiment of the present application;

[0082] Figure 2 A schematic diagram of another application scenario provided for an embodiment of the present application;

[0083] Figure 3 A schematic diagram of another application scenario provided for an embodiment of the present application;

[0084] Figure 4 Schematic diagram of the power control method provided in the embodiment of the present application Figure 1 ;

[0085] Figure 5 Schematic diagram of the power control method provided in the embodiment of the present application Figure 2 ;

[0086] Figure 6 Schematic diagram of the power control method provided in the embodiment of the present application Figure 3 ;

[0087] Figure 7 Schematic diagram of the power control method provided in the embodiment of the present application Figure 4 ;

[0088] Figure 8 Schematic diagram of the power control method provided in the embodiment of the present application Figure 5 ;

[0089] Fig. 9 A schematic diagram of the structure of a power control device 10 provided in an embodiment of the present application;

[0090] Fig.10 Another structural schematic diagram of the power control device 10 provided in an embodiment of the present application;

[0091] Fig.11 A schematic diagram of the structure of a power control device 20 provided in an embodiment of the present application;

[0092] Fig.12 Another structural schematic diagram of the power control device 20 provided in an embodiment of the present application;

[0093] Fig.13 A schematic diagram of the structure of a power control device 30 provided in an embodiment of the present application;

[0094] Fig.14 Another structural schematic diagram of the power control device 30 provided in the embodiment of the present application;

[0095] Fig.15 A schematic diagram of the structure of a power control device 40 provided in an embodiment of the present application;

[0096] Fig.16 A schematic diagram of the structure of a power control device 50 provided in an embodiment of the present application. DETAILED DESCRIPTION

[0097] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0098] In this application, "and / or" describes the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. The character " / " generally indicates that the associated objects before and after are in an "or" relationship.

[0099] In the present application, "at least one" means one or more, and "plurality" means two or more.

[0100] The first, second, etc. descriptions appearing in this application are only used for illustrating and distinguishing the described objects. There is no order or importance. They do not indicate any special limitation on the number of objects in the embodiments of the present application and cannot constitute any limitation on the embodiments of the present application.

[0101] In this application, "exemplary", "in some embodiments", "in other embodiments", etc. are used to indicate examples, illustrations, or descriptions. Any embodiment or design described as "exemplary" in this application should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of the word "exemplary" is intended to present concepts in a concrete way.

[0102] In order to explain the present application more clearly, the relevant technologies involved in the present application are first introduced below.

[0103] 1. AIoT

[0104] AIoT aims to provide a low-power, low-complexity and low-cost IoT solution. In the standard system of the Third Generation Partnership Project (3GPP), it is a standard with lower capabilities than the Narrow Band Internet of Things (NB-IoT). In the non-3GPP system, its market is aimed at the market demand of Radio Frequency Identification (RFID), providing comparable and more advantageous technical solutions.

[0105] The demand for AIoT is to solve scenarios that are not covered by current 3GPP technologies, such as the following three scenarios:

[0106] 1) Extreme environmental conditions, such as high pressure, extremely high temperature / low temperature, and humid environment;

[0107] 2) Strong demands for one or more of ultra-low complexity, very small device size / form factor (e.g., millimeter thickness), maintenance-free (e.g., no need for traditional battery replacement of the device), and longer life cycle;

[0108] 3) Device scenarios where traditional battery drive is not applicable.

[0109] Therefore, AIoT is also an IoT service, which aims to provide AIoT devices with features such as low power consumption and low complexity, very small size and longer life cycle. AIoT devices are powered by energy harvesting and can be battery-free or have limited energy storage capacity (i.e. using capacitors). It can communicate with other devices without traditional power supply and / or avoid human intervention for charging or replacement.

[0110] Typically, IoT devices that support ambient power do not have traditional batteries. The device itself uses energy harvested from radio waves or any other form of energy that can be obtained in a specific use case. For example, in some scenarios, AIoT devices can harvest energy from radio waves, where the radio waves may come from 5G New Radio (NR) network entities or user equipment (UE). In other scenarios, IoT devices that support ambient power can harvest energy from solar energy, light, motion / vibration, heat, pressure, or any other power source.

[0111] AIoT devices can be divided into the following three types:

[0112] AIoT device A: no energy storage capability, no independent signal generation / amplification, can use backscatter transmission;

[0113] AIoT device B: has energy storage capability, no independent signal generation, can participate in backscatter transmission, and the stored energy can be used to amplify the backscatter signal;

[0114] AIoT device C: has energy storage capabilities and can generate independent signals.

[0115] 2. Backscatter

[0116] Backscattering is usually achieved through the following basic idea: the sender controls its antenna to switch between two states: completely absorbing the excitation signal and completely reflecting the excitation signal. The reflected signal can be called the backscattered signal. Since the backscattered signal has different amplitudes, different amplitudes can be used to represent different information.

[0117] When electromagnetic waves encounter the boundary of two media with different impedances during propagation, the electromagnetic waves will be absorbed or reflected back to a certain extent. Therefore, information transmission can be achieved by simply switching the impedance at the antenna. Backscattering technology can reduce the power consumption of RF devices by several orders of magnitude, so backscattering technology has great advantages in various applications of the Internet of Things.

[0118] Excitation signal S in The corresponding backscattered signal S out It can be described by the following formula:

[0119]

[0120] Among them, Z a is the impedance of the backscatter device antenna (usually 50Ω), Z c is the impedance of the circuit connected to the antenna.

[0121] It can be seen from the above formula that when the power of the excitation signal is increased, the power of the corresponding backscattered signal will also be increased accordingly.

[0122] For ease of understanding, the following Figure 1 , Figure 2 and Figure 3 , the application scenarios to which the embodiments of the present application are applicable are described.

[0123] Figure 1 A schematic diagram of an application scenario provided by an embodiment of the present application. Figure 1As shown, it includes a network device, an intermediate node and a backscattering device. The intermediate node can send control information and / or control signals to the backscattering device (exemplarily, when the backscattering device is an AIoT device, the control information can be AIoT control information, and the control signal can be an AIoT control signal), and can also send an excitation signal; the backscattering device loads data and / or signals on the received excitation signal and backscatters it back to the intermediate node, and the reflected excitation signal can be called a backscattering signal; the intermediate node can receive the backscattering signal sent by the backscattering device, and obtain the data and / or signal carried by the backscattering signal based on the backscattering signal; the network device and the intermediate node can communicate through the Uu interface.

[0124] Among them, the network device is a device with wireless transceiver function. Including but not limited to: Evolutional Node B (eNB or eNodeB) in Long Term Evolution (LTE), base station (gNodeB or gNB) or multi-transmission and receiving points (M-TRP) in new radio technology (NR), base station in subsequent evolution system, access node in wireless fidelity (WiFi) system, etc. The base station can be: macro base station, micro base station, pico base station, small station, or balloon station, etc. Multiple base stations can support the networks of the same technology mentioned above, or they can support the networks of different technologies mentioned above. The base station can include one or more co-sited or non-co-sited TRPs.

[0125] An intermediate node is a device with wireless transceiver function. It can be a network device or a terminal. For example, an intermediate node can be an eNB, eNodeB, gNodeB, gNB, M-TRP, a base station in a subsequent evolution system, an access node in a WiFi system, a mobile phone, a tablet computer, a computer with wireless transceiver function, a virtual reality (VR) terminal, an augmented reality (AR) terminal, a wireless terminal in industrial control (IndustrialControl), a vehicle terminal, a wireless terminal in self-driving, a wireless terminal in remote medical care, a wireless terminal in smart grid (Smart Grid), a wireless terminal in transportation safety (Transportation Safety), a wireless terminal in smart city (Smart City), a wireless terminal in smart home (Smart Home), a wearable terminal, etc.

[0126] The backscatter device can be an AIoT device or other device that can communicate via backscatter signals.

[0127] Figure 2 Another application scenario diagram provided by the embodiment of the present application. Figure 2 As shown, it includes a network device, an auxiliary node and a backscattering device. The auxiliary node can send control information and / or control signals to the backscattering device (exemplarily, when the backscattering device is an AIoT device, the control information can be AIoT control information, and the control signal can be an AIoT control signal), and can also send an excitation signal; the backscattering device loads data and / or signals on the received excitation signal and backscatters it to the network device, and the reflected excitation signal can be called a backscattering signal; the network device can receive the backscattering signal sent by the backscattering device, and obtain the data and / or signal carried by the backscattering signal based on the backscattering signal; the network device and the auxiliary node can communicate through the Uu interface.

[0128] The auxiliary node is a device with wireless transceiver function. It can be a network device or a terminal. For example, the auxiliary node can be an eNB, eNodeB, gNodeB, gNB, M-TRP, a base station in a subsequent evolution system, an access node in a WiFi system, a mobile phone, a tablet computer, a computer with wireless transceiver function, a VR terminal, an AR terminal, a wireless terminal in industrial control, a vehicle terminal, a wireless terminal in unmanned driving, a wireless terminal in telemedicine, a wireless terminal in smart grid, a wireless terminal in transportation safety, a wireless terminal in a smart city, a wireless terminal in a smart home, a wearable terminal, etc.

[0129] Figure 3 A schematic diagram of another application scenario provided by the embodiment of the present application. Figure 3 As shown, it includes a network device, an auxiliary node and a backscattering device. The network device can send control information and / or control signals to the backscattering device (exemplarily, when the backscattering device is an AIoT device, the control information can be AIoT control information, and the control signal can be an AIoT control signal), and can also send an excitation signal; the backscattering device loads data and / or signals on the received excitation signal and backscatters it to the auxiliary node, and the reflected excitation signal can be called a backscattering signal; the auxiliary node can receive the backscattering signal sent by the backscattering device, and obtain the data and / or signal carried by the backscattering signal based on the backscattering signal; the network device and the auxiliary node can communicate through the Uu interface.

[0130] In the above scenario, the number of backscatter devices may be one or more.

[0131] In the above scenario, when the power of the excitation signal decreases, the power of the corresponding backscattered signal will also decrease accordingly, which will result in a lower decoding success rate of the backscattered signal. If the excitation signal is continuously sent at high power, the power consumption of the device sending the excitation signal will be higher.

[0132] In order to solve the above technical problems, the present application provides a power control method, which can be performed by a first node and a network device, wherein the action performed by the first node can also be performed by a device in the first node, a chip in the first node, or a chip independent of the first node, and the action performed by the network device can also be performed by a device in the network device, a chip in the network device, or a chip independent of the network device. For the convenience of description, the present application is described by taking the execution subject as the first node and the network device as an example. The first node can perform power control according to the indication information and / or the backscatter signal (for example, power control of the excitation signal), or the first node can send the first information obtained according to the backscatter signal to the network device, and the network device can perform power control according to the first information (for example, power control of the excitation signal). By controlling the power of the excitation signal, while improving the decoding success rate of the backscatter signal, the power consumption of the device sending the excitation signal is avoided to be too high.

[0133] The technical solution shown in the present application is described in detail below through specific embodiments. It should be noted that the following embodiments can exist independently or in combination with each other, and the same or similar contents will not be described repeatedly in different embodiments.

[0134] Figure 4 Schematic diagram of the power control method provided in the embodiment of the present application Figure 1 .like Figure 4 As shown, the method includes:

[0135] S401. The first node performs power control according to indication information.

[0136] The first node may be an intermediate node or an auxiliary node.

[0137] Optionally, the method further includes: the first node receiving indication information.

[0138] For example, in Figure 1 and Figure 2 In the embodiment, the first node may receive indication information from the network device.

[0139] Optionally, the indication information may include power control related information.

[0140] In a possible implementation manner, the power control related information may include at least one of the following:

[0141] Power limit information, power indication information, indication information allowing power control.

[0142] The power limit information is used to indicate the range of the power value after power control. The power indication information is used to determine the power after power control.

[0143] Exemplarily, the power limitation information may include a maximum transmit power and / or an initial transmit power. The power indication information may include one or more of a power ramp step, an absolute transmit power, an optional transmit power list, and a transmit power index value. The optional transmit power list includes multiple transmit powers.

[0144] Here, the absolute transmit power refers to the absolute value of the transmit power.

[0145] The following multiple ways are used to explain how the first node performs power control according to the power control related information.

[0146] Method 1: The first node may determine the transmission power of the excitation signal according to the power limitation information.

[0147] For example, if the power limit information is the maximum transmit power, the transmit power of the excitation signal determined by the first node shall not be greater than the maximum transmit power. If the power limit information is the initial transmit power, the transmit power of the excitation signal determined by the first node shall not be less than the initial transmit power. If the power limit information is the maximum transmit power and the initial transmit power, the transmit power of the excitation signal determined by the first node shall not be greater than the maximum transmit power and shall not be less than the initial transmit power.

[0148] Method 2: The first node may determine the transmission power of the excitation signal according to the power indication information.

[0149] For example, if the power indication information is absolute transmit power, the first node may send the excitation signal according to the absolute transmit power.

[0150] For another example, if the power indication information is a selectable transmit power list, then after receiving the power indication information, the first node may select a transmit power in the selectable transmit power list to transmit the excitation signal.

[0151] For another example, if the power indication information is an optional transmit power list and a transmit power index value, where the transmit power index value is used to indicate a transmit power in the optional transmit power list, then after receiving the power indication information, the first node can use the transmit power corresponding to the transmit power index value in the optional transmit power list to send an excitation signal.

[0152] For another example, if the power indication information is a transmit power index value, where the transmit power index value is used to indicate a transmit power, then after receiving the power indication information, the first node may use the transmit power corresponding to the transmit power index value to transmit the excitation signal. At this time, the transmit powers corresponding to different transmit power index values ​​may be pre-set in the first node or specified by the protocol.

[0153] For another example, if the power indication information is a power ramp step, the first node can calculate a new power based on the original power according to the power ramp step, and use the new power to send an excitation signal, for example, the new power = the original power + the power ramp step. The first node can perform multiple power controls according to the power ramp step, and this application does not limit this.

[0154] In addition, priorities can be set for the parameters in the power indication information. When the power indication information includes multiple parameters, the parameter with the highest priority can be used to determine the power of the transmitted excitation signal. For example, the power ramp step is recorded as parameter A, the absolute transmit power is recorded as parameter B, and the optional transmit power list and transmit power index value are recorded as parameter C. If the priorities of parameter A, parameter B, and parameter C are respectively parameter A, parameter B, and parameter C from high to low, then if the power indication information includes parameter A and parameter B, then the first node can use parameter A to determine the transmit power of the excitation signal. If the power indication information includes parameter B and parameter C, then the first node can use parameter B to determine the transmit power of the excitation signal.

[0155] Mode 3: The first node may determine the transmission power of the excitation signal according to the indication information of allowing power control. The specific determination method may be any one of the above-mentioned mode 1, mode 2 and the following mode 4, or other methods, which are not limited in this application.

[0156] Method 4: The first node may determine the transmission power of the excitation signal according to the power limitation information and the power indication information.

[0157] In the fourth method, the first node may adopt the above-mentioned second method to determine the transmission power of the excitation signal, and the determined transmission power needs to meet the requirements of the power limitation information.

[0158] The first node may determine a transmission power using the above-mentioned method 2. At this time, if the transmission power does not satisfy the power limit information, the first node may determine the transmission power based on the power limit information. For example, if the power limit information includes a maximum transmission power and the determined transmission power is greater than the maximum transmission power, the maximum transmission power is used to send the excitation signal. If the power limit information includes an initial transmission power and the determined transmission power is less than the initial transmission power, the initial transmission power is used to send the excitation signal.

[0159] The first node may also adopt the above-mentioned method 2 to determine multiple transmission powers (for example, the multiple transmission powers may be determined based on the multiple parameters mentioned in the above example), and select a transmission power that meets the requirements of the power limitation information from the multiple transmission powers; if there is no transmission power that meets the requirements of the power limitation information, the transmission power is determined based on the power limitation information. For details, please refer to the above.

[0160] In mode 4, the first node may perform multiple power controls according to the power limit information and the power indication information. For example, if the power limit information is the initial transmission power and the power indication information is the power ramp step, the first node may use the initial transmission power as the transmission power of the excitation signal when performing power control for the first time; if the receiving device of the backscattered signal still cannot successfully decode the backscattered signal after the first node performs the first power control, the first node performs the second power control, and the second power control uses the sum of the initial transmission power and the power ramp step as the transmission power of the excitation signal; if the receiving device of the backscattered signal still cannot successfully decode the backscattered signal after the first node performs the second power control, the first node performs the third power control, and the third power control uses the sum of the previous transmission power and the power ramp step as the transmission power of the excitation signal; and so on, each subsequent power control uses the sum of the previous transmission power of the first node and the power ramp step as the actual transmission power of the excitation signal.

[0161] Optionally, the power control related information may be configured by Radio Resource Control (RRC), or indicated by Downlink Control Information (DCI). Alternatively, part of the power control related information may be configured by RRC, and part of the power control related information may be indicated by DCI.

[0162] For example, at least one of the maximum transmit power, the initial transmit power, and the power ramp step size may be configured by RRC.

[0163] As another example, at least one of the maximum transmit power, the initial transmit power and the power ramp step may be configured by RRC first, and then the DCI may indicate the indication information allowing power control.

[0164] As another example, the optional transmit power list may be configured by RRC first, and then the transmit power index value may be indicated by DCI.

[0165] As another example, the absolute transmit power or the power ramp step size may be indicated by the DCI.

[0166] exist Figure 4In the illustrated embodiment, the first node may control its own power according to the indication information.

[0167] Figure 4 The embodiment shown can be applied to Figure 1 In the scenario shown, that is, the first node is an intermediate node, the network device can send indication information to the intermediate node, the intermediate node determines the sending power of the excitation signal according to the indication information, and sends the excitation signal to the backscattering device, and the backscattering device sends the backscattering signal to the intermediate node.

[0168] Figure 4 The embodiment shown can also be applied to Figure 2 In the described scenario, that is, the first node is an auxiliary node, the network device can send indication information to the auxiliary node, the auxiliary node determines the sending power of the excitation signal according to the indication information, and sends the excitation signal to the backscattering device, and the backscattering device sends the backscattering signal to the network device.

[0169] Figure 5 Schematic diagram of the power control method provided in the embodiment of the present application Figure 2 .like Figure 5 As shown, the method includes:

[0170] S501: A first node performs power control according to a backscattered signal.

[0171] The first node may be an intermediate node.

[0172] S501 can be implemented in the following two ways:

[0173] In the first way, if no backscatter signal is received within a preset period of time, the first node performs power control (ie, the transmission power may be increased based on the current transmission power).

[0174] In the second mode, the first node receives the backscattered signal and performs power control according to the backscattered signal. Figure 1 In the embodiment of the present invention, the first node may receive a backscatter signal from a backscatter device.

[0175] In the second mode, the first node may receive a backscatter signal sent by a backscatter device; may also receive multiple backscatter signals sent by the same backscatter device; and may also receive backscatter signals sent by multiple backscatter devices.

[0176] In the second manner, in a possible implementation manner, if the first node receives a backscatter signal, power control may be performed according to relevant parameters of the backscatter signal.

[0177] The related parameters of the backscatter signal include at least one of the following: the receiving power of the backscatter signal, the energy of the backscatter signal, the integrity check result of the backscatter signal, and the decoding result of the backscatter signal.

[0178] The following multiple methods are used to explain how to perform power control based on relevant parameters of the backscatter signal.

[0179] Mode 1: If the relevant parameters of the backscatter signal include the receiving power, and the receiving power is less than or equal to the power threshold, the first node can perform power control (ie, the transmitting power can be increased based on the current transmitting power).

[0180] In a possible implementation, when the received power satisfies the corresponding condition (recorded as condition 1), the first node may perform power control. Exemplarily, condition 1 may be that within a preset time period, X% of the received power of the backscattered signals is less than or equal to the power threshold. Then, when the received power satisfies condition 1, the first node may increase the transmit power based on the current transmit power.

[0181] That is, in mode 1, if the received power of X% of the backscattered signals is less than or equal to the power threshold within a preset time period, it is considered that the received power is less than or equal to the power threshold as a whole.

[0182] The received power may be a reference signal received power (RSRP) or a received signal strength indicator (RSSI).

[0183] Mode 2: If the relevant parameters of the backscatter signal include energy, and the energy is less than or equal to the energy threshold, the first node can perform power control (ie, the transmission power can be increased based on the current transmission power).

[0184] In a possible implementation, when the energy satisfies the corresponding condition (referred to as condition 2), the first node may perform power control. Exemplarily, condition 2 may be that within a preset period of time, the energy of Y% of the backscattered signals is less than or equal to the energy threshold. Then, when the energy satisfies condition 2, the first node may increase the transmission power based on the current transmission power.

[0185] That is, in mode 2, if Y% of the backscattered signals have energies less than or equal to the energy threshold within a preset time period, it is considered that the energy is less than or equal to the energy threshold as a whole.

[0186] The energy detection method may be Listen Before Talk (LBT), and the energy threshold may be an Energy Detection Threshold (EDT) in LBT.

[0187] Mode 3: If the relevant parameters of the backscatter signal include an integrity check result, and the integrity check result is a check failure, the first node can perform power control (ie, the transmission power can be increased based on the current transmission power).

[0188] In a possible implementation, when the integrity check result satisfies the corresponding condition (recorded as condition 3), the first node may perform power control. Exemplarily, condition 3 may be that within a preset period of time, P% of the integrity check results of the backscattered signals are check failures. Then, when the integrity check result satisfies condition 3, the first node may increase the transmission power based on the current transmission power.

[0189] That is, in mode 3, if P% of the integrity check results of the backscattered signals are check failures within a preset time period, it is considered that the integrity check results are check failures as a whole.

[0190] Mode 4: If the relevant parameters of the backscatter signal include a decoding result, and the decoding result is a decoding failure, the first node may perform power control (ie, the transmission power may be increased based on the current transmission power).

[0191] In a possible implementation, when the decoding result satisfies the corresponding condition (condition 4), the first node may perform power control. Exemplarily, condition 4 may be that within a preset period of time, Q% of the backscattered signals have decoding results that are decoding failures. Then, when the decoding result satisfies condition 4, the first node may increase the transmission power based on the current transmission power.

[0192] That is, in mode 4, if Q% of the backscattered signals have decoding results that are decoding failures within a preset period of time, it is considered that the decoding results as a whole are decoding failures.

[0193] Among them, when the relevant parameters of the backscatter signal include multiple parameters including the received power of the backscatter signal, the energy of the backscatter signal, the integrity check result of the backscatter signal, and the decoding result of the backscatter signal, the first node can perform power control when each of the multiple parameters meets the corresponding conditions. For example, when the relevant parameters of the backscatter signal include the received power of the backscatter signal and the energy of the backscatter signal, if the received power of the backscatter signal meets condition 1 and the energy of the backscatter signal meets condition 2, the first node can perform power control.

[0194] In any of the above methods, X, Y, P, Q and the duration of the preset time period can be determined according to actual conditions, and this application does not limit this.

[0195] Exemplarily, the value range of X may be 80-100, the value range of Y may be 80-100, the value range of P may be 70-100, and the value range of Q may be 60-100.

[0196] The multiple backscatter signals within the preset time period may come from the same backscatter device or from different backscatter devices.

[0197] The starting time of the preset time period may be the time when the first node sends the excitation signal, and the duration of the preset time period may be set according to actual conditions, which is not limited in this application.

[0198] The preset time period may also be other predefined time periods.

[0199] In any of the above methods, the increase in transmission power can be determined based on actual conditions, and this application does not limit this.

[0200] For example, if the difference between the power threshold and the received power of the backscattered signal is large, the transmission power of the excitation signal can be greatly increased; if the difference between the power threshold and the received power of the backscattered signal is small, the transmission power of the excitation signal can be slightly increased. Alternatively, the power amplitude of each increase can be preset or specified by the protocol, which is not limited in this application.

[0201] exist Figure 5 In the illustrated embodiment, the first node may directly control the transmission power of the excitation signal according to the backscattered signal.

[0202] Figure 5 The embodiment shown can be applied to Figure 1 In the scenario shown, the first node is an intermediate node, the intermediate node sends an excitation signal to a backscattering device, the backscattering device sends a backscattering signal to the intermediate node, and the intermediate node performs power control on a subsequently sent excitation signal based on the backscattering signal.

[0203] Figure 6 Schematic diagram of the power control method provided in the embodiment of the present application Figure 3 .like Figure 6 As shown, the method includes:

[0204] S601: The first node performs power control according to indication information and a backscattered signal.

[0205] The first node may be an intermediate node.

[0206] Optionally, the method further includes: the first node receiving indication information and a backscatter signal.

[0207] For example, in Figure 1 In the embodiment, the first node may receive indication information from the network device and receive a backscatter signal from the backscatter device.

[0208] The first node may receive a backscatter signal sent by a backscatter device; may also receive multiple backscatter signals sent by the same backscatter device; and may also receive backscatter signals sent by multiple backscatter devices.

[0209] In a possible implementation manner, the first node may determine whether to perform power control according to relevant parameters of the backscatter signal, and if so, may perform power control according to the power control related information indicated by the indication information.

[0210] The relevant parameters of the backscatter signal can be found in Figure 5 The relevant description in the embodiment shown, as well as the contents of the power control related information, can be found in Figure 4 The relevant description in the illustrated embodiment will not be repeated here.

[0211] For a description of determining whether to perform power control based on the relevant parameters of the backscattered signal, see Figure 5 The embodiments shown will not be described in detail here.

[0212] For power control based on power control related information, see Figure 4 The relevant description in the illustrated embodiment will not be repeated here.

[0213] In a possible implementation, after the first node receives the indication information sent by the network device, if the first node does not receive a backscatter signal within a preset time period, the first node may perform power control according to the power control related information indicated by the indication information.

[0214] The starting time of the preset time period may be the time when the first node sends the excitation signal, and the duration of the preset time period may be set according to actual conditions, which is not limited in this application.

[0215] The preset time period may also be other predefined time periods.

[0216] exist Figure 6 In the embodiment shown, the network device first indicates the power control related information, and when the intermediate node determines that the transmit power needs to be adjusted, it can control the transmit power according to the power control related information. The process is simple, avoids a large amount of signaling interaction, and reduces the delay caused by signaling interaction.

[0217] Figure 6 The embodiment shown can be applied to Figure 1 The scenario shown is that the first node is an intermediate node, the network device sends indication information to the intermediate node, the intermediate node sends an excitation signal to the backscattering device, the backscattering device sends a backscattering signal to the intermediate node, and the intermediate node determines whether it is necessary to control the sending power of the excitation signal based on the backscattering signal. If so, the sending power of the excitation signal is controlled according to the power control related information indicated by the indication information.

[0218] Figure 7 Schematic diagram of the power control method provided in the embodiment of the present application Figure 4 .like Figure 7 As shown, the method includes:

[0219] S701: A first node sends first information.

[0220] The first node may be an intermediate node.

[0221] For example, in Figure 1 In the process, the first node may send first information to the network device.

[0222] The first information may be determined based on the backscattered signal.

[0223] In the first case, the first information includes information of the received backscatter signal. At this time, the first node can directly package the received backscatter signal and forward it to the network device (ie, the first node only performs transparent transmission and does not decode the backscatter signal).

[0224] The information of the received backscatter signal may refer to the entire backscatter signal or a part of the backscatter signal.

[0225] In the second case, the first node may also send the first information to the network device according to the backscatter signal (that is, the first node sends the first information to the network device after analyzing, decoding, etc. the backscatter signal). In this case, the first information may include at least one of the following:

[0226] (1) information indicating the reception status of backscattered signals;

[0227] (2) indicating information for increasing the transmission power of the excitation signal;

[0228] (3) Information of at least one backscattering device to receive the excitation signal.

[0229] The indication information of the backscatter signal reception status may be failure status indication information, such as low reception power indication information, integrity check failure indication information, and decoding failure indication information.

[0230] The information of the at least one backscattering device to receive the excitation signal may include information such as an identification and an operating frequency of the at least one backscattering device to receive the excitation signal.

[0231] In the third case, the first node may also send the first information to the network device when the backscatter signal is not received within a preset time period. At this time, the first information may include indication information of the backscatter signal reception status, and the indication information of the backscatter signal reception status may be negative acknowledgment (NACK) indication information. The first information may also include indication information for increasing the sending power of the excitation signal and / or information of at least one backscatter device to receive the excitation signal.

[0232] S702: The first node receives indication information.

[0233] For example, in Figure 1 In the process, the first node receives the indication information sent by the network device.

[0234] The indication information may be determined based on the first information.

[0235] If the first node directly packages and forwards the received backscatter signal to the network device (that is, the first information received by the network device is the information of the backscatter signal received by the first node), the network device needs to analyze the first information and then determine whether the power of the first node needs to be controlled. If it is determined that the power of the first node needs to be controlled, an indication information can be sent to the first node.

[0236] If the first node sends the first information based on the backscatter signal (that is, the first information received by the network device is at least one of the indication information of the backscatter signal reception status, the indication information of increasing the sending power of the excitation signal, or the information of at least one backscatter device to receive the excitation signal), then the network device can determine the need to control the power of the first node based on the received first information, and then determine whether the sending power can be increased in combination with the status of the network. If so, the indication information can be sent to the first node.

[0237] If the first information includes NACK indication information, the network device can determine the need to control the power of the first node based on the received first information, and then determine whether the transmission power can be increased in combination with the network status. If so, the indication information can be sent to the first node.

[0238] The specific content of the indication information can be found in the relevant description of S401 and will not be repeated here.

[0239] S703: The first node performs power control according to the indication information.

[0240] It should be noted that the execution process of S703 can refer to the execution process of S401, which will not be repeated here.

[0241] exist Figure 7 In the illustrated embodiment, the first node sends the first information to the network device. When the network device finally determines that the power of the first node can be controlled according to the first information, it can send indication information to the first node, and the first node can control its own transmission power according to the indication information. Since the network device can generate indication information in combination with the network status, controlling the transmission power according to the indication information can avoid network interference caused by increasing the transmission power.

[0242] Figure 7 The embodiment shown can be applied to Figure 1 The scenario shown is that the first node is an intermediate node, the intermediate node sends an excitation signal to the backscattering device, the backscattering device sends a backscattering signal to the intermediate node, the intermediate node sends first information to the network device based on the backscattering signal, the network device sends indication information to the intermediate node based on the first information, and the intermediate node controls the sending power of the excitation signal according to the power control related information indicated by the indication information.

[0243] Figure 8 Schematic diagram of the power control method provided in the embodiment of the present application Figure 5 .like Figure 8 As shown, the method includes:

[0244] S801. A first node sends first information to a network device.

[0245] Correspondingly, the network device receives the first information sent by the first node.

[0246] It should be noted that the execution process of S801 can refer to the execution process of S701, which will not be repeated here.

[0247] The only thing that needs to be explained is that the first node of this application is an auxiliary node. Figure 3 In the embodiment of the present invention, the auxiliary node sends first information to the network device.

[0248] S802. The network device performs power control based on the first information.

[0249] After receiving the first information, the network device can determine whether it is necessary to control the transmission power of the excitation signal based on the first information. If so, the network device can control the power of the excitation signal according to the state of the network (that is, the network device can increase the transmission power based on the current transmission power of the excitation signal).

[0250] The extent of the increase in transmit power can be determined based on actual conditions, and this application does not impose any limitation on this.

[0251] exist Figure 8 In the illustrated embodiment, the first node sends first information to the network device, and the network device controls the transmission power of the excitation signal based on the first information, which helps to improve the decoding success rate of the backscattered signal.

[0252] Figure 8 The embodiment shown can be applied to Figure 3 The scenario shown is that the first node is an auxiliary node, the network device sends an excitation signal to the backscatter device, the backscatter device sends a backscatter signal to the auxiliary node, the auxiliary node sends first information to the network device based on the backscatter signal, and the network device controls the sending power of the excitation signal based on the first information.

[0253] Fig. 9 This is a schematic diagram of the structure of the power control device 10 provided in the embodiment of the present application. Fig. 9 , the device 10 comprises:

[0254] The power control module 11 is used to perform power control according to the indication information and / or the backscattered signal.

[0255] Fig.10 Another structural diagram of the power control device 10 provided in the embodiment of the present application. Fig.10 ,exist Fig. 9 Based on the structure shown, the device 10 also includes:

[0256] The receiving module 12 is used to receive indication information and / or backscattered signals.

[0257] In a possible implementation manner, the power control module 11 is specifically configured to:

[0258] Power control is performed according to relevant parameters of the backscatter signal; the relevant parameters include at least one of the following: the received power of the backscatter signal, the energy of the backscatter signal, the integrity check result of the backscatter signal, and the decoding result of the backscatter signal.

[0259] In a possible implementation manner, the power control module 11 is specifically configured to:

[0260] If the relevant parameters of the backscatter signal include received power, and the received power is less than or equal to the power threshold, power control is performed;

[0261] If the relevant parameters of the backscatter signal include energy, and the energy is less than or equal to the energy threshold, power control is performed;

[0262] If the relevant parameters of the backscatter signal include an integrity check result, and the integrity check result is a check failure, power control is performed;

[0263] If the relevant parameters of the backscatter signal include a decoding result, and the decoding result is a decoding failure, power control is performed.

[0264] In a possible implementation manner, the power control module 11 is specifically configured to:

[0265] If no backscatter signal is received within a preset period of time, power control is performed.

[0266] In a possible implementation, the device 10 further includes:

[0267] The sending module is used to send first information, where the first information includes at least one of the following:

[0268] Indicative information of backscatter signal reception status;

[0269] Instruction information for increasing the sending power of the excitation signal;

[0270] information of at least one backscattering device to receive the excitation signal;

[0271] Information about the received backscattered signal.

[0272] In a possible implementation manner, the indication information includes power control related information, and the power control related information includes at least one of the following:

[0273] Power limit information, power indication information, indication information allowing power control;

[0274] The power limit information is used to indicate the range of the power value after power control, and the power indication information is used to determine the power after power control.

[0275] In a possible implementation manner, the power limitation information includes a maximum transmit power and / or an initial transmit power; the power indication information includes one or more of a power ramp step, an absolute transmit power, an optional transmit power list, and a transmit power index value;

[0276] The optional transmission power list includes multiple transmission powers.

[0277] The power control device 10 can perform the above Figures 4 to 7 The implementation principles and beneficial effects of the steps performed by the first node in the method embodiment shown are similar and will not be repeated here.

[0278] Fig.11 A schematic diagram of the structure of the power control device 20 provided in the embodiment of the present application. Fig.11 , the device 20 comprises:

[0279] The sending module 21 is used to send first information, where the first information is obtained according to the backscattered signal and is used for power control.

[0280] Fig.12 Another structural diagram of the power control device 20 provided in the embodiment of the present application. Fig.12 ,exist Fig.11 Based on the structure shown, the device 20 also includes:

[0281] The receiving module 22 is used to receive the backscattered signal.

[0282] In a possible implementation manner, the first information includes at least one of the following:

[0283] Indicative information of backscatter signal reception status;

[0284] Instruction information for increasing the sending power of the excitation signal;

[0285] information of at least one backscattering device to receive the excitation signal;

[0286] Information about the received backscattered signal.

[0287] The power control device 20 can perform the above Figure 8 The implementation principles and beneficial effects of the steps performed by the first node in the method embodiment shown are similar and will not be repeated here.

[0288] Fig.13 This is a schematic diagram of the structure of the power control device 30 provided in the embodiment of the present application. Fig.13 , the device 30 comprises:

[0289] The sending module 31 is used to send indication information, where the indication information is used for power control.

[0290] Fig.14 This is another structural diagram of the power control device 30 provided in the embodiment of the present application. Fig.14 ,exist Fig.13 Based on the structure shown, the device 30 also includes:

[0291] A receiving module 32, configured to receive first information;

[0292] The sending module 31 is used to send the indication information based on the first information.

[0293] In a possible implementation manner, the indication information includes power control related information, and the power control related information includes at least one of the following:

[0294] Power limit information, power indication information, indication information allowing power control;

[0295] The power limit information is used to indicate the range of the power value after power control, and the power indication information is used to determine the power after power control.

[0296] In a possible implementation manner, the power limitation information includes a maximum transmit power and / or an initial transmit power; the power indication information includes one or more of a power ramp step, an absolute transmit power, an optional transmit power list, and a transmit power index value;

[0297] The optional transmission power list includes multiple transmission powers.

[0298] In a possible implementation manner, the first information includes at least one of the following:

[0299] Indicative information of backscatter signal reception status;

[0300] Instruction information for increasing the sending power of the excitation signal;

[0301] information of at least one backscatter device receiving the excitation signal;

[0302] Information about the received backscattered signal.

[0303] The power control device 30 can perform the above Figures 4 to 7 The implementation principles and beneficial effects of the steps executed by the network device in the method embodiment shown are similar and will not be described in detail here.

[0304] Fig.15 This is a schematic diagram of the structure of the power control device 40 provided in the embodiment of the present application. Fig.15 , the device 40 comprises:

[0305] A receiving module 41, configured to receive first information, where the first information is obtained according to a backscattered signal;

[0306] The power control module 42 is used to perform power control based on the first information.

[0307] In a possible implementation manner, the first information includes at least one of the following:

[0308] Indicative information of backscatter signal reception status;

[0309] Instruction information for increasing the sending power of the excitation signal;

[0310] information of at least one backscatter device receiving the excitation signal;

[0311] Information about the received backscattered signal.

[0312] The power control device 40 can perform the above Figure 8 The steps performed by the network device in the method embodiment shown have similar implementation principles and beneficial effects, and will not be repeated here.

[0313] Fig.16 This is a schematic diagram of the structure of the power control device 50 provided in the embodiment of the present application. Fig.16 , the power control device 50 may include: a transceiver 51, a memory 52, and a processor 53. The transceiver 51 may include: a transmitter and / or a receiver. The transmitter may also be referred to as a transmitter, a transmitter, a transmission port, a transmission interface, or similar descriptions, and the receiver may also be referred to as a receiver, a receiver, a reception port, a reception interface, or similar descriptions. Exemplarily, the transceiver 51, the memory 52, and the processor 53 are interconnected via a bus 54.

[0314] The memory 52 is used to store program instructions;

[0315] The processor 53 is used to execute the program instructions stored in the memory, so as to enable the power control device 50 to execute the steps executed by the first node or the steps executed by the network device in the above method embodiment.

[0316] The transceiver 51 is used to perform the transceiver function of the power control device 50 in the above power control method.

[0317] The power control device 50 may be a chip, a module, an integrated development environment (IDE), etc.

[0318] The power control device 50 can execute the steps performed by the first node in the above method embodiment or the steps performed by the network device. The implementation principles and beneficial effects are similar and will not be described in detail here.

[0319] An embodiment of the present application provides a computer-readable storage medium, in which computer-executable instructions are stored. When the computer-executable instructions are executed on a computer, any one of the above-mentioned power control methods is executed.

[0320] The embodiment of the present application may also provide a computer program product, which may be executed by a processor, and when the computer program product is executed by a computer, any of the above-mentioned power control methods is executed.

[0321] All or part of the steps of the above-mentioned method embodiments can be completed by hardware related to program instructions. The aforementioned program can be stored in a readable memory. When the program is executed, the steps of the above-mentioned method embodiments are executed; and the aforementioned memory (storage medium) includes: read-only memory (ROM), random access memory (RAM), flash memory, hard disk, solid state drive, magnetic tape, floppy disk, optical disc and any combination thereof.

[0322] The embodiments of the present application are described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processing unit of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to generate a machine, so that the instructions executed by the processing unit of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0323] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0324] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0325] Obviously, those skilled in the art can make various changes and modifications to the embodiments of the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the embodiments of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include these modifications and variations.

Claims

1. A power control method, characterized in that, it includes: performing power control according to indication information and / or backscatter signals.

2. The method according to claim 1, characterized in that, the method further includes: receiving the indication information and / or the backscatter signal.

3. The method according to claim 2, characterized in that, performing power control according to the backscatter signal includes: performing power control according to relevant parameters of the backscatter signal; the relevant parameters include at least one of the following: the received power of the backscatter signal, the energy of the backscatter signal, the integrity check result of the backscatter signal, the decoding result of the backscatter signal.

4. The method according to claim 3, characterized in that, performing power control according to the relevant parameters of the backscatter signal includes: if the relevant parameters of the backscatter signal include the received power and the received power is less than or equal to a power threshold, then perform power control; if the relevant parameters of the backscatter signal include the energy and the energy is less than or equal to an energy threshold, then perform power control; if the relevant parameters of the backscatter signal include the integrity check result and the integrity check result is a check failure, then perform power control; if the relevant parameters of the backscatter signal include the decoding result and the decoding result is a decoding failure, then perform power control.

5. The method according to claim 1, characterized in that, performing power control according to the backscatter signal includes: if the backscatter signal is not received within a preset time period, then perform power control.

6. The method according to any one of claims 1-5, characterized in that, before receiving the indication information, the method further includes: sending a first information, the first information includes at least one of the following: indication information on the reception situation of the backscatter signal; indication information for increasing the transmission power of the excitation signal; information of at least one backscatter device receiving the excitation signal; information of the received backscatter signal.

7. The method according to any one of claims 1-6, characterized in that, the indication information includes power control related information, and the power control related information includes at least one of the following: power limit information, power indication information, indication information allowing power control; wherein, the power limit information is used to indicate the range where the power value after power control is located, and the power indication information is used to determine the power after power control.

8. The method according to claim 7, characterized in that, the power limit information includes the maximum transmission power and / or the initial transmission power; the power indication information includes one or more of a power ramp step size, an absolute transmission power, an optional transmission power list, a transmission power index value; wherein, the optional transmission power list includes multiple transmission powers.

9. A power control method, characterized in that, it includes: sending a first information, the first information is obtained according to a backscatter signal, and the first information is used for power control.

10. The method according to claim 9, wherein, the method comprises: receiving the backscatter signal.

11. The method according to claim 9 or 10, wherein, the first information comprises at least one of the following: indication information of the backscatter signal reception condition; indication information for increasing the transmission power of the excitation signal; information of at least one backscatter device that receives the excitation signal; information of the received backscatter signal.

12. A power control method, wherein, it comprises: transmitting indication information, where the indication information is used for power control.

13. The method according to claim 12, wherein, the transmitting of the indication information comprises: receiving first information and transmitting the indication information based on the first information.

14. The method according to claim 12 or 13, wherein, the indication information comprises power control related information, and the power control related information comprises at least one of the following: power limit information, power indication information, indication information allowing power control; wherein, the power limit information is used to indicate the range where the power value after power control is located, and the power indication information is used to determine the power after power control.

15. The method according to claim 14, wherein, the power limit information comprises the maximum transmission power and / or the initial transmission power; the power indication information comprises one or more of a power ramp step, an absolute transmission power, a list of optional transmission powers, a transmission power index value; wherein, the list of optional transmission powers includes multiple transmission powers.

16. The method according to claim 13, wherein, the first information comprises at least one of the following: indication information of the backscatter signal reception condition; indication information for increasing the transmission power of the excitation signal; information of at least one backscatter device that receives the excitation signal; information of the received backscatter signal.

17. A power control method, wherein, it comprises: receiving first information, where the first information is obtained according to the backscatter signal; performing power control based on the first information.

18. The method according to claim 17, wherein, the first information comprises at least one of the following: indication information of the backscatter signal reception condition; indication information for increasing the transmission power of the excitation signal; information of at least one backscatter device that receives the excitation signal; information of the received backscatter signal.

19. A power control device, wherein, it comprises: a power control module for performing power control according to the indication information and / or the backscatter signal.

20. A power control device, wherein, it comprises: a sending module for sending first information, where the first information is obtained according to the backscatter signal and is used for power control.

21. A power control device, wherein, it comprises: a sending module for sending indication information, where the indication information is used for power control.

22. A power control device, wherein, it comprises: A receiving module, configured to receive first information, where the first information is obtained according to a backscatter signal; A power control module, configured to perform power control based on the first information.

23. A power control device, characterized in that it includes: a processor and a memory; the memory stores computer-executable instructions; the processor executes the computer-executable instructions stored in the memory to implement the method according to any one of claims 1-8, or the method according to any one of claims 9-11, or the method according to any one of claims 12-16, or the method according to claim 17 or 18.

24. A computer-readable storage medium, characterized in that the computer-readable storage medium stores computer-executable instructions, and when the computer-executable instructions are executed by a computer, the method according to any one of claims 1-8, or the method according to any one of claims 9-11, or the method according to any one of claims 12-16, or the method according to claim 17 or 18 is implemented.

25. A computer program product, characterized in that it includes a computer program, and when the computer program is executed by a computer, the method according to any one of claims 1-8, or the method according to any one of claims 9-11, or the method according to any one of claims 12-16, or the method according to claim 17 or 18 is implemented.

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