Power rollback method and device and storage medium

Abstract

The invention provides a power rollback method and device and a storage medium. In the technical scheme of the invention, terminal equipment firstly obtains first transmitting power, and the first transmitting power is the maximum power transmitted by network equipment; under the condition that the triggering power backoff is determined according to the first transmitting power and a backoff threshold, controlling a digital power module and / or an analog power module in the terminal equipment to carry out power backoff according to the MPR and a preset adjustment factor; wherein the preset adjustment factor is determined according to a waveform peak-to-average ratio corresponding to a modulation mode of the terminal equipment and a nonlinear index of the terminal equipment. In the power rollback method, the terminal device flexibly controls the digital power module and / or the analog power module in the terminal device to perform power rollback according to the MPR and the preset adjustment factor, so that device saturation can be effectively avoided, the influence on the reliability of a front-end device is reduced, and the product competitiveness is improved.

Description

Technical Field

[0001] The present application relates to the field of communication technology, and in particular to a power back-off method, device and storage medium. Background Art

[0002] In the field of communication technology, the 3rd Generation Partnership Project (3GPP) standard defines the maximum power for the new radio (NR) frequency band without distinguishing the modulation mode. However, because the peak-to-average value of the waveform of high-order modulation is relatively large, the adjacent channel leakage ratio (ACLR) and error vector magnitude (EVM) indicators of high-order modulation at maximum power are poor, which in turn affects the uplink throughput. Therefore, the 3GPP standard introduces maximum output power reduction (MPR) for each modulation mode and bandwidth.

[0003] In the current related technologies, MPR is mostly implemented in the digital domain or analog domain. When MPR is implemented in the digital domain, when MPR becomes smaller, because the digital domain remains unchanged, the analog domain VGA gain will be raised, which will affect the reliability of the front-end device and conflict with the product power constraint mechanism; when MPR is implemented in the analog domain, when the MPR value is relatively large, the linearity of the analog amplifier is relatively poor, which easily causes device saturation and leads to failure of the index test. Therefore, how to flexibly implement MPR and reduce the impact on the device has become a technical problem that needs to be solved urgently. Summary of the invention

[0004] The present application provides a power fallback method, device and storage medium, which can effectively avoid device saturation, reduce the impact on the reliability of front-end devices, and improve product competitiveness.

[0005] In a first aspect, the present application provides a power backoff method, the method comprising: obtaining a first transmission power, the first transmission power being the maximum power sent by a network device; when power backoff is triggered according to the first transmission power and a backoff threshold, controlling a digital power module and / or an analog power module in the terminal device to perform power backoff according to a maximum power backoff MPR and a preset adjustment factor; wherein the preset adjustment factor is determined according to a waveform peak-to-average ratio corresponding to a modulation mode of the terminal device and a nonlinear index of the terminal device, and the backoff threshold is determined according to a second transmission power and the MPR, and the second transmission power is the maximum transmission power supported by the terminal device.

[0006] In the second aspect, the present application provides a power backoff device, which includes: an acquisition module for acquiring a first transmission power, where the first transmission power is the maximum power sent by a network device; a control module for controlling a digital power module and / or an analog power module in the terminal device to perform power backoff according to a maximum power backoff MPR and a preset adjustment factor when power backoff is triggered according to the first transmission power and a backoff threshold; wherein the preset adjustment factor is determined based on a waveform peak-to-average ratio corresponding to a modulation mode of the terminal device and a nonlinear index of the terminal device, and the backoff threshold is determined based on a second transmission power and the MPR, and the second transmission power is the maximum transmission power supported by the terminal device.

[0007] In a third aspect, the present application provides an electronic device, comprising a processor and a memory, wherein the memory is used to store code instructions; the processor is used to execute the code instructions to implement the method in the first aspect above.

[0008] Optionally, there are one or more processors and one or more memories.

[0009] Optionally, the memory may be integrated with the processor, or the memory may be provided separately from the processor.

[0010] In the specific implementation process, the memory can be a non-transitory memory, such as a read-only memory (ROM), which can be integrated with the processor on the same chip or can be set on different chips respectively. The embodiments of the present application do not limit the type of memory and the setting method of the memory and the processor.

[0011] In a fourth aspect, the present application provides a computer-readable storage medium, which stores a computer program (also referred to as code, or instruction) which, when executed on a computer, enables the computer to execute the method in the first aspect.

[0012] In a fifth aspect, the present application provides a computer program product, comprising: a computer program (also referred to as code, or instruction), which enables a computer to execute the method in the above-mentioned first aspect when the computer program is executed.

[0013] In the power back-off method of the present application, the terminal device flexibly controls the digital power module and / or analog power module in the terminal device to perform power back-off according to the MPR and the preset adjustment factor, which can effectively avoid device saturation and improve the amplifier linearity of the analog power module; at the same time, the terminal device uses a combination of analog power modules and digital power modules for power back-off, which can also ensure a larger adjustment dynamic range, avoid raising the gain of the analog power module, reduce the impact on the reliability of front-end devices, and improve product competitiveness. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of an application scenario provided by an embodiment of the present application;

[0015] Figure 2 A schematic diagram of the structure of a transmitting module in a terminal device provided in one embodiment of the present application;

[0016] Figure 3 A schematic diagram of a system architecture of a terminal device provided for one embodiment of the present application;

[0017] Figure 4 A schematic flow chart of a power back-off method provided in one embodiment of the present application;

[0018] Figure 5 A schematic flow chart of a power backoff method provided in another embodiment of the present application;

[0019] Figure 6 A schematic structural diagram of a power back-off device provided in one embodiment of the present application;

[0020] Figure 7 A structural schematic diagram of a power back-off device provided in another embodiment of the present application. DETAILED DESCRIPTION

[0021] The technical solution in this application will be described below in conjunction with the accompanying drawings.

[0022] In order to facilitate the clear description of the technical solutions of the embodiments of the present application, in the embodiments of the present application, the words "first" and "second" are used to distinguish the same items or similar items with substantially the same functions and effects. For example, the first instruction and the second instruction are to distinguish different user instructions, and their order is not limited. Those skilled in the art can understand that the words "first" and "second" do not limit the quantity and execution order, and the words "first" and "second" do not necessarily limit them to be different.

[0023] It should be noted that, in this application, words such as "exemplarily" or "for example" are used to indicate examples, illustrations or explanations. Any embodiment or design described as "exemplarily" or "for example" in this application should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of words such as "exemplarily" or "for example" is intended to present related concepts in a specific way.

[0024] In addition, "at least one" means one or more, and "plurality" means two or more. "And / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone, where A and B can be singular or plural. The character " / " generally indicates that the previous and next associated objects are in an "or" relationship. "At least one of the following" or similar expressions refers to any combination of these items, including any combination of single or plural items. For example, at least one of a, b and c can mean: a, or b, or c, or a and b, or a and c, or b and c, or a, b and c, where a, b, c can be single or multiple.

[0025] In the field of communication technology, the 3GPP standard defines the maximum power for the NR band and does not distinguish between modulation methods. For example, the protocol stipulates that the power level of band n1, Power class 3, is 23dBm. However, because the peak-to-average value of the waveform of high-order modulation is relatively large, the ACLR and EVM indicators of high-order modulation are poor at maximum power, which in turn affects the uplink throughput. Therefore, the 3GPP standard introduces MPR for each modulation method and bandwidth. Correspondingly, different waveforms and different modulation methods define different MPR values. As the modulation method increases, the larger the MPR value, the lower the maximum power. For example, the MPR value of high-order modulation CP 256QAM is the largest, reaching 6.5dB.

[0026] Figure 1 This is a schematic diagram of an application scenario provided by an embodiment of the present application. Figure 1 As shown, the application scenario 100 may include a terminal device 101 and a network device 102, wherein the terminal device 101 may interact with the network device 102 via wireless communication.

[0027] It should be understood that the terminal device 101 can be a mobile phone, a tablet computer, a computer with wireless transceiver function, a virtual reality (VR) terminal device, an augmented reality (AR) terminal device, a wireless terminal in industrial control, a wireless terminal in self-driving, a wireless terminal in remote medical, 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, etc., and the present application does not limit this.

[0028] The network device 102 may be any device having a wireless transceiver function. The device includes but is not limited to: evolved Node B (eNB or eNodeB), radio network controller (RNC), Node B (NB), base station controller (BSC), base transceiver station (BTS), home base station (e.g., home evolved NodeB, or home NodeB, HNB), baseband unit (BBU), access point (AP) in wireless fidelity (WIFI) system, wireless relay node, wireless backhaul node, transmission point (TP) or transmission and reception point (TRP), etc., and can also be a gNB in ​​a 5G communication system or NR system, or a transmission point (TRP or TP), one or a group of (including multiple antenna panels) antenna panels of a base station in a 5G system, or a network node constituting a gNB or a transmission point, such as a BBU, or a distributed unit (DU), etc., which is not limited in this application.

[0029] It should also be understood that during the interaction between the terminal device 101 and the network device 102, the network device 102 can issue a maximum power command to the terminal device 101. Furthermore, the physical layer of the terminal device 101 calculates the actual transmission power based on the maximum transmission power supported by the terminal device 101 itself and the configured MPR parameters. If the maximum power in the maximum power command triggers power backoff, the terminal device 102 will call the MPR parameters to achieve power backoff.

[0030] The transmit power of the terminal equipment is mainly realized by the digital power module, analog power module, and power amplifier, while the MPR is mainly realized by the digital power module and analog power simulation inside the transceiver. The digital power module can be used to adjust the power and / or gain in the digital domain, and the analog power module can be used to adjust the power and / or gain in the analog domain.

[0031] For example, taking the digital power module as a digital front end (DFE) and the analog power module as a variable gain amplifier (VGA) as an example, the structural diagram of the transmitting module inside the terminal device is as follows: Figure 2 The transmitting module includes a DFE 201 , a digital to analog converter (DAC) 202 , a mixer 203 , a VGA 204 , a power amplifier (PA) 205 and an antenna 206 .

[0032] Among them, DFE 201 is a digital signal processing technology used to equalize signals in digital communication systems to improve signal quality and reliability; DAC 202 is used to convert digital signals into analog signals; mixer 203 is a circuit whose output signal frequency is equal to the sum, difference or other combination of the frequencies of two input signals, usually composed of nonlinear elements and frequency selection circuits, and is used to convert one value into another value; VGA 204 is used to amplify or reduce the radio frequency signal to be received or transmitted to the required power level to transmit it to the subsequent circuit for signal processing; PA is an amplifier circuit that can output high-power signals, and is used to amplify the power of the input signal to a level sufficient to drive the output load; antenna 206 is a converter that converts the guided wave propagating on the transmission line into an electromagnetic wave propagating in an unbounded medium (usually free space), or performs the opposite conversion. Generally, antennas are reversible, that is, the same antenna can be used as both a transmitting antenna and a receiving antenna, so it can be used to receive or transmit signals. In addition, the circuit before DAC 202 is digital circuit, the circuit after DAC 202 is analog circuit, the gain of VGA 204 is the power gain of analog circuit, and the gain of PA 205 is the power gain of RF front end. The power of digital signal input to DFE 201 plus DFE power gain, VGA 204 power gain, PA 205 power gain, minus other path loss, is the actual power used for transmitting signal of the transmitting module.

[0033] It should be understood that DFE 201 is used to power adjust the input signal in the digital domain and send the obtained output signal to DAC 202, wherein the input signal may be a digital baseband signal; DAC 202 is used to perform digital-to-analog conversion on the output signal to obtain an analog baseband signal and send it to mixer 203; mixer 203 is used to mix the received analog baseband signal and the local oscillator signal into a radio frequency signal and send the radio frequency signal to VGA 204; VGA 204 is used to power adjust the radio frequency signal in the analog domain and send the obtained output signal to PA 205; further, PA 205 is used to power amplify the output signal from VGA 204 and transmit the final amplified output signal to antenna 206 for transmission.

[0034] It should also be understood that Figure 2 The DFE 201, DAC 202, mixer 203 and VGA 204 can also be combined to form a transmitter, and the antenna 206 can not only transmit signals, but also be used to receive signals, such as receiving power commands sent by network devices, etc., which is not limited in this application.

[0035] It should be noted that the above application scenarios may involve the 4G communication field or the 5G communication field, or the LTE communication field, and of course other future-oriented fields, which are not limited here. In addition, the above application scenarios may also include other devices, such as relay devices, routing devices, etc. Figure 1 This is not shown in the application scenario, but those skilled in the art can set it according to actual usage and is not limited here.

[0036] As the use of MPR becomes more and more widespread, in the current related technologies, one way to implement MPR is: to implement it in the digital domain, and to fix the digital domain backoff value according to the peak-to-average ratio for different modulation modes, but when the MPR changes, the digital domain backoff remains unchanged. Another way to implement it is: MPR is mainly implemented by analog domain VGA, and the digital domain only fixes a small backoff, which is almost negligible, and when the MPR changes, the VGA changes accordingly.

[0037] However, in the first implementation, when MPR becomes smaller, the analog domain VGA gain will be increased because the digital domain remains unchanged, which will affect the reliability of the front-end device and conflict with the product power constraint mechanism; in the other implementation, MPR is mainly implemented by the analog domain VGA, and when the MPR value is relatively large, the linearity of the analog amplifier is relatively poor, which can easily cause device saturation and result in failure of the index test. Therefore, how to flexibly implement MPR and reduce the impact on the device has become a technical problem that needs to be solved urgently.

[0038] In view of this, the embodiment of the present application provides a power backoff method, device and storage medium. In the technical solution of the present application, the terminal device first obtains a first transmission power, which is the maximum power sent by the network device; then, when the power backoff is triggered according to the first transmission power and the backoff threshold, the digital power module and / or analog power module in the terminal device is controlled to perform power backoff according to the maximum power backoff MPR and the preset adjustment factor; wherein the preset adjustment factor is determined according to the waveform peak-to-average ratio corresponding to the modulation mode of the terminal device and the nonlinear index of the terminal device, and the backoff threshold is determined according to the second transmission power and MPR, and the second transmission power is the maximum transmission power supported by the terminal device. In the power backoff method of the present application, the terminal device flexibly controls the digital power module and / or analog power module in the terminal device to perform power backoff according to the MPR and the preset adjustment factor, which can effectively avoid device saturation and improve the amplifier linearity of the analog power module; at the same time, the terminal device uses the analog power module and the digital power module in combination for power backoff, which can also ensure a larger adjustment dynamic range, avoid raising the gain of the analog power module, reduce the impact on the reliability of the front-end device, and improve product competitiveness.

[0039] It should be understood that the terminal device involved in the embodiments of the present application may be a mobile phone, a tablet computer, a laptop computer, a PDA, a mobile Internet device (MID), a wearable device, a virtual reality (VR) device, an augmented reality (AR) device, and other devices that can interact with network devices, and the specific embodiments of the present application are not limited to this.

[0040] For example, please refer to Figure 3 , Figure 3 A schematic diagram of the system architecture of a terminal device provided in one embodiment of the present application. Figure 3 As shown, the terminal device includes components such as a processor 310, a memory 320, a transceiver 330, a display unit 340, an input unit 350, a sensor 360, an audio circuit 370, and a power module 380.

[0041] The processor 310 is the control center of the terminal device, and uses various interfaces and lines to connect various parts of the entire terminal device. By running or executing software programs and / or modules stored in the memory 320, and calling data stored in the memory 320, the processor 310 performs various functions of the terminal device and processes data, thereby monitoring the terminal device as a whole. Optionally, the processor 310 may include one or more processing units; optionally, the processor 310 may integrate an application processor, which mainly processes operating devices, user interfaces, and application programs, etc. Of course, other processors may also be included, which are not listed here one by one.

[0042] The memory 320 can be used to store software programs and modules. The processor 310 executes various functional applications and data processing of the terminal device by running the software programs and modules stored in the memory 320. The memory 320 mainly includes a program storage area and a data storage area, wherein the program storage area can store operating devices, at least one application required for a function (such as a sound playback function, an image playback function, etc.), etc.; the data storage area can store data created according to the use of the terminal device (such as audio data, a phone book, etc.), etc. In addition, the memory 320 may include a high-speed random access memory, and may also include a non-volatile memory, such as at least one disk storage device, a flash memory device, or other volatile solid-state storage devices.

[0043] The transceiver 330 can provide wireless communication solutions applied to terminal devices, including wireless local area networks (WLAN) (such as wireless fidelity (Wi-Fi) networks), Bluetooth (BT), global navigation satellite system (GNSS), frequency modulation (FM), near field communication (NFC), infrared (IR), etc. The transceiver 330 can be one or more devices integrating at least one communication processing module, for example, integrating an antenna and a baseband processor into the transceiver 330, or integrating an antenna and a modem processor into the transceiver 330, etc., which are not limited here.

[0044] The display unit 340 can be used to display information input by the user or information provided to the user and various menus of the terminal device. The display unit 340 can be configured in the form of a liquid crystal display (LCD), an organic light-emitting diode (OLED), etc., which is not limited here.

[0045] The input unit 350 can be used to receive input digital or character information, and to generate key signal input related to the user settings and function control of the terminal device. Specifically, the input unit 350 can collect the user's operations on or near it, and drive the corresponding connection device according to a pre-set program. In addition, the input unit 350 may include a touch panel, which can be implemented in various types such as resistive, capacitive, infrared, and surface acoustic waves. In addition to the touch panel, the input unit 350 may also include other input devices. Specifically, other input devices may include, but are not limited to, one or more of function keys (such as volume control keys, switch keys, etc.), trackballs, joysticks, etc.

[0046] The terminal device may also include at least one sensor 360, such as a gyroscope sensor, a motion sensor, and other sensors. The motion sensor may include an accelerometer sensor for detecting the magnitude of acceleration in all directions, and the magnitude and direction of gravity when stationary, which may be used for applications that identify the posture of the terminal device, such as horizontal and vertical screen switching, related games, magnetometer posture calibration, etc. As for other sensors that may be configured in the terminal device, such as a pressure gauge, a barometer, a hygrometer, a thermometer, an infrared sensor, a fingerprint sensor, etc., they will not be described in detail here.

[0047] The audio circuit 370 may include a speaker and a microphone, and may provide an audio interface between the user and the terminal device. The audio circuit 370 may transmit the electrical signal converted from the received audio data to the speaker, which is converted into a sound signal for output; on the other hand, the microphone converts the collected sound signal into an electrical signal, which is received by the audio circuit 370 and converted into audio data, and then the audio data is output to the processor 310 for processing, and then sent to another terminal device through the video circuit, or the audio data is output to the memory 320 for further processing.

[0048] The terminal device also includes a power module 380 for supplying power to various components. Optionally, the power module 380 can be logically connected to the processor 310 through a power management device, so as to manage charging, discharging, power consumption and other functions through the power management device.

[0049] Although not shown, the terminal device may further include a camera. Optionally, the camera may be located at the front or rear of the terminal device, which is not limited in the embodiment of the present application.

[0050] It is to be understood that the structure illustrated in the embodiments of the present application does not constitute a specific limitation on the terminal device. In other embodiments of the present application, the terminal device may include more or fewer components than shown in the figure, or combine certain components, or split certain components, or arrange the components differently. The components shown in the figure may be implemented in hardware, software, or a combination of software and hardware.

[0051] In order to make the purpose and technical solution of the present application clearer and more intuitive, the power fallback method, device and storage medium provided by the embodiments of the present application will be described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present application and are not used to limit the present application.

[0052] Please refer to Figure 4 , is a schematic flow chart of a power backoff method provided in one embodiment of the present application. The method can be applied to the above Figure 1 In addition to the application scenarios shown in the figure, the method can also be applied to other scenarios, which are not limited in the present application embodiment. Figure 1 Take the scenario shown in the figure as an example, accordingly, the terminal device in the following text is Figure 1 The terminal device 101 shown in the figure, the network device hereinafter is Figure 1 The network device 102 is shown in detail below. Figure 4 The various steps in the method shown in the flowchart include:

[0053] S401, obtaining a first transmission power, where the first transmission power is a maximum power transmitted by a network device.

[0054] It should be understood that information is constantly being exchanged between the terminal device and the network device. For example, the network device may send a command to the terminal device, which carries the maximum transmission power to inform the terminal device to transmit the signal at the maximum transmission power. The maximum transmission power is calculated by the network device based on the current actual situation of the network device, for example, it may be calculated based on the distance between the network device and the terminal device.

[0055] Correspondingly, the terminal device obtains the maximum transmission power, that is, the first transmission power.

[0056] It should also be understood that the command sent by the network device to the terminal device also carries a modulation and coding scheme (MCS) value. Different MCS values ​​correspond to different modulation methods and physical transmission rates corresponding to the modulation methods. The larger the MCS value, the higher the corresponding modulation method, that is, the greater the throughput. Different waveforms and different modulation methods define MPR values, so different MCS values ​​have corresponding MPR values.

[0057] S402, when the power backoff is triggered according to the first transmission power and the backoff threshold, the digital power module and / or the analog power module in the terminal device is controlled to perform power backoff according to the maximum power backoff MPR and a preset adjustment factor.

[0058] Among them, the preset adjustment factor is determined according to the waveform peak-to-average ratio corresponding to the modulation mode of the terminal device and the nonlinear index of the terminal device, and the back-off threshold is determined according to the second transmission power and MPR, and the second transmission power is the maximum transmission power supported by the terminal device.

[0059] It should be understood that the second transmission power is the maximum transmission power supported by the terminal device itself, and is also the maximum transmission power of the terminal device specified in the 3GPP protocol; the terminal device is also configured with an MPR corresponding to the MCS value carried in the command sent by the network device. Accordingly, the backoff threshold is determined based on the second transmission power and the MPR, for example, it can be the difference between the second transmission power and the MPR.

[0060] It should also be understood that the preset adjustment factor is the dividing line for power backoff of the digital power module and the analog power module in the terminal device, which is specifically determined according to the peak-to-average ratio of the waveform corresponding to the modulation mode of the terminal device and the nonlinear index of the terminal device, where the peak-to-average ratio is a measurement parameter of the waveform, which is equal to the ratio obtained by dividing the amplitude of the waveform by the effective value RMS; the nonlinear index can be, for example, ACLR, which is used to measure the downlink transmission performance and is the ratio of the transmission power of the main channel to the measured power of the adjacent channel. The lower the ACLR value, the smaller the interference of the power of the adjacent channel, which means the better the performance of the system. Generally, dBc is used as the unit.

[0061] It should be noted that the preset adjustment factor may also be a value set based on experience, or a value obtained based on actual measurement, which is not specifically limited in this application. For example, the preset adjustment factor may be set to 10 dB or 8 dB, etc.

[0062] Understandably, when the terminal device determines that power backoff is triggered based on the first transmission power and the backoff threshold, the terminal device further controls the digital power module and / or analog power module in the terminal device to perform power backoff based on the MPR and the preset adjustment factor, for example, controlling the digital power module to perform power backoff, or controlling the analog power module to perform power backoff, or controlling the digital power module and the analog power module in combination to perform power backoff, which is not specifically limited in the present application.

[0063] It should also be understood that when the terminal device determines that power backoff is not triggered based on the first transmit power and the backoff threshold, there is no need to call the MPR to obtain the first transmit power transmission signal.

[0064] In this embodiment, the terminal device first obtains the first transmission power, which is the maximum power sent by the network device; then, when the power backoff is triggered according to the first transmission power and the backoff threshold, the digital power module and / or analog power module in the terminal device is controlled to perform power backoff according to the maximum power backoff MPR and the preset adjustment factor; wherein the preset adjustment factor is determined according to the peak-to-average ratio of the waveform corresponding to the modulation mode of the terminal device and the nonlinear index of the terminal device. In other words, when the terminal device determines that the power backoff is triggered according to the first transmission power and the backoff threshold, the digital power module and / or analog power module in the terminal device is flexibly controlled to perform power backoff according to the MPR and the preset adjustment factor, which can effectively avoid device saturation and improve the amplifier linearity of the analog power module; in addition, the terminal device uses the combination of analog power module and digital power module for power backoff, which can ensure a larger adjustment dynamic range, and can also avoid raising the gain of the analog power module, reduce the impact on the reliability of the front-end device, and improve the competitiveness of the product.

[0065] Based on the above embodiments, Figure 5 A schematic flow chart of a power backoff method provided in another embodiment of the present application, Figure 5 In the embodiment shown, taking how the terminal device implements power backoff as an example, the following describes in detail Figure 5 The various steps in the method shown in the flowchart include:

[0066] S501: Obtain a first transmission power, where the first transmission power is a maximum power sent by a network device.

[0067] It should be understood that information is constantly being exchanged between the terminal device and the network device. For example, the network device may send a command to the terminal device, which carries the maximum transmission power to inform the terminal device to transmit the signal at the maximum transmission power. The maximum transmission power is calculated by the network device based on the current actual situation of the network device. For example, it may be calculated based on the distance between the network device and the terminal device, etc. This application does not limit this.

[0068] Correspondingly, the terminal device obtains the maximum transmission power, that is, the first transmission power.

[0069] Optionally, the terminal device may receive commands sent by the network device through an antenna device in the terminal device, which is not limited in this application.

[0070] S502: Determine whether the first transmit power triggers power backoff.

[0071] It should be understood that the terminal device first obtains the backoff threshold, which is the difference between the second transmit power and the MPR. The second transmit power is the maximum transmit power supported by the terminal device itself and is also the maximum transmit power of the terminal device specified in the 3GPP protocol.

[0072] It should also be understood that the command sent by the network device to the terminal device also carries an MCS value. Different MCS values ​​correspond to different modulation modes and physical transmission rates corresponding to the modulation modes. The larger the MCS value, the higher the corresponding modulation mode, that is, the greater the throughput. Different waveforms and different modulation modes define MPR values, so different MCS values ​​have corresponding MPR values. Accordingly, the terminal device is configured with an MPR corresponding to the MCS value carried in the command sent by the network device, and the backoff threshold is obtained according to the difference between the second transmission power and the MPR.

[0073] Further, the terminal device compares the first transmit power and the backoff threshold. When the first transmit power is greater than the backoff threshold, it determines that the first transmit power has triggered power backoff; when the first transmit power is less than or equal to the backoff threshold, it determines that the first transmit power has not triggered power backoff.

[0074] For example, assuming that the backoff threshold is M, the first transmit power is Pemax, and the second transmit power is P powerclass , then the backoff threshold M satisfies the following relationship:

[0075] M=P powerclass -MPR

[0076] Further, the terminal device compares the first transmit power Pemax with the backoff threshold M. If Pemax>M, it is determined that the first transmit power Pemax triggers power backoff; if Pemax≤M, it is determined that the first transmit power Pemax does not trigger power backoff.

[0077] For example, assuming Pemax = 22dBm, P powerclass If the configuration is 23dBm and MPR=3, then

[0078] Pemax>P powerclass -MPR

[0079] Therefore, it is determined that Pemax triggers power cutback.

[0080] S503: When the first transmit power triggers power backoff, determine that the actual transmit power of the terminal device is the difference between the second transmit power and the MPR.

[0081] It should be understood that the first transmission power is Pemax and the second transmission power is P powerclass For example, the physical layer of the terminal device calculates its actual transmission power as min(Pemax, P powerclass -MPR), accordingly, when the first transmit power triggers power fallback, the terminal device determines that the actual transmit power of the terminal device is the difference between the second transmit power and the MPR, that is, P powerclass -MPR; when the first transmission power does not trigger the power backoff limit, the actual transmission power of the terminal device is determined to be the first transmission power, that is, Pemax.

[0082] For example, assuming that Pemax = 22dBm, P powerclass If the configuration is 23dBm and MPR=3, then

[0083] Pemax>P powerclass -MPR

[0084] Therefore, it is determined that Pemax triggers power backoff, and its actual transmission power is P powerclass -MPR=23-3=20dBm.

[0085] It should be noted that, when the first transmission power of the terminal device triggers power backoff, the power backoff is implemented by the following steps.

[0086] S504: Compare the MPR and the preset adjustment factor.

[0087] It should be understood that the preset adjustment factor is the dividing line for power fallback of the digital power module and the analog power module in the terminal device, which is specifically determined according to the peak-to-average ratio of the waveform corresponding to the modulation mode of the terminal device and the nonlinear index of the terminal device, wherein the peak-to-average ratio is a measurement parameter of the waveform, which is equal to the ratio obtained by dividing the amplitude of the waveform by the effective value RMS; the nonlinear index can be, for example, ACLR, which is used to measure the downlink transmission performance and is the ratio of the transmission power of the main channel to the measured power of the adjacent channel. The lower the ACLR value, the smaller the interference of the power of the adjacent channel, which means the better the performance of the system. Generally, dBc is used as the unit.

[0088] It should be noted that the preset adjustment factor may also be a value set based on experience, or a value obtained based on actual measurement, which is not specifically limited in this application. For example, the preset adjustment factor may be set to 10 dB or 8 dB, etc.

[0089] The terminal device compares the MPR with a preset adjustment factor to flexibly control the digital power module and / or the analog power module to perform power fallback.

[0090] S505 : When the MPR is less than the preset adjustment factor, control the digital power module to perform power fallback.

[0091] It should be understood that when the MPR is less than the preset adjustment factor, the terminal device determines the MPR as the power backoff value of the digital power module, and controls the digital power module to perform power backoff.

[0092] It should also be understood that when the MPR is greater than or equal to the preset adjustment factor, the terminal device controls the digital power module and the analog power module to perform power backoff. Specifically, the terminal device first calculates the difference between the MPR and the preset adjustment factor to obtain a first difference; then determines the first difference as the power backoff value of the analog power module, and the preset adjustment factor as the power backoff value of the digital power module, so as to achieve power backoff.

[0093] Understandably, the terminal device preferentially uses a digital power module to achieve power back-off, which can avoid saturation of analog power module devices. For example, assuming that when the transmitting module of the terminal device is outputting power, the output power of the digital power module is 5dB. If the output power of the digital power module is kept unchanged and the output power of the analog power module is reduced, that is, power back-off is achieved by the analog power module, then the power back-off value exceeds a certain value and the amplifier of the analog power module is prone to saturation.

[0094] Furthermore, when the MPR is less than the preset adjustment factor, the terminal device controls the digital power module to implement the MPR value power backoff, which can avoid the saturation of the analog power module device and improve the amplifier linearity of the analog power module; when the MPR is greater than or equal to the preset adjustment factor, since the MPR is larger than the preset adjustment factor, the analog power module and the digital power module need to be combined for power backoff, that is, the MPR is divided to obtain the power backoff value of the digital power module and the power backoff value of the analog power module, such as the power backoff value of the digital power module is the preset adjustment factor, and the power backoff value of the analog power module is the difference between the MPR and the preset adjustment factor. By combining the analog power module and the digital power module for power backoff, a larger adjustment dynamic range can be guaranteed, and the gain of the analog power module can be avoided, reducing the impact on the reliability of the front-end device. For example, if the digital power module backoff value is fixed, if the MPR changes, such as becoming smaller, since the digital power module backoff value remains unchanged, the gain of the analog power module will be raised, which will affect the reliability of the front-end device and conflict with the product power constraint mechanism.

[0095] In other words, assuming the preset adjustment factor is X, the MPR is compared with X. When MPR < X, the MPR is backed off by the digital power module; when MPR ≥ X, X dB is implemented by the digital power module and (MPR-X) dB is backed off by the analog power module.

[0096] Exemplarily, assuming that in a continuous carrier aggregation (CA) scenario, X=10dB, MPR=14dB, then the digital power module backs off by 10dB, and the analog power module backs off by 14-10=4dB.

[0097] S506, controlling the terminal device to transmit a signal with actual transmission power.

[0098] It should be understood that after the above steps S504 and S505 are performed to realize power backoff, the terminal device finally transmits the signal with the actual transmit power. For example, when the first transmit power triggers power backoff, the terminal device transmits the signal with the difference between the second transmit power and the MPR as the actual transmit power; when the first transmit power does not trigger the power backoff limit, the terminal device transmits the signal with the first transmit power as the actual transmit power.

[0099] Among them, the terminal device transmits the signal or through Figure 2 This is achieved by the transmitting module shown in . Exemplarily, DFE201 performs power adjustment on the input signal in the digital domain. For example, when the MPR is less than the preset adjustment factor, the digital domain implements the MPR back-off. When the MPR is greater than or equal to the preset adjustment factor, the digital domain implements the preset adjustment factor back-off, and sends the obtained output signal to DAC 202, wherein the input signal may be a digital baseband signal; DAC 202 is used to perform digital-to-analog conversion on the output signal to obtain an analog baseband signal, and send it to mixer 203; mixer 203 is used to mix the received analog baseband signal and the local oscillator signal into a radio frequency signal, and send the radio frequency signal to VGA204; VGA 204 is used to perform power adjustment on the radio frequency signal in the analog domain. For example, when the MPR is greater than or equal to the preset adjustment factor, the analog domain implements the back-off of the difference between the MPR and the preset adjustment factor, and sends the obtained output signal to PA205; further, PA 205 is used to power amplify the output signal from VGA 204, and transmit the finally amplified output signal to antenna 206 for transmission.

[0100] The transmitted signal may be a unicast signal, a multicast signal or a broadcast signal, and the embodiment of the present application does not limit the form of the transmitted signal.

[0101] It should be noted that the digital power module mentioned in the embodiments of the present application may also be referred to as a digital domain, and the analog power module may also be referred to as an analog domain, and the present application does not limit this.

[0102] In this embodiment, the terminal device first obtains the first transmission power, and then determines whether the first transmission power triggers power backoff. When the first transmission power triggers power backoff, the MPR and the preset adjustment factor are compared. When the MPR is less than the preset adjustment factor, the digital power module is controlled to perform power backoff. When the MPR is greater than or equal to the preset adjustment factor, the digital power module and the analog power module are controlled to perform power backoff, and finally the terminal device is controlled to transmit the signal at the actual transmission power. In this power backoff method, the terminal device preferentially uses the digital power module to achieve power backoff, which can avoid saturation of the analog power module device and improve the linearity of the device; flexibly controlling the digital power module and the analog power module to achieve power backoff in linkage can avoid raising the gain of the analog power module and reduce the impact on the reliability of the front-end device, thereby improving the throughput of the uplink weak signal scenario and enhancing the competitiveness of the product.

[0103] The power backoff method provided in the embodiments of the present application can be applied to but not limited to: long term evolution (LTE) MPR mechanism, NR MPR mechanism, dual connectivity (E-UTRAN new radio-dual connectivity, ENDC) MPR mechanism, millimeter wave MPR mechanism, non-terrestrial network (NTN) MPR mechanism.

[0104] Among them, when the network type of the terminal device is LTE, it can be understood that the power backoff method of the present application is used for the LTE MPR mechanism; when the network type of the terminal device is NR, it can be understood that the power backoff method of the present application is applied to the NR MPR mechanism; when the network type of the terminal device is a dual-connection network of LTE and NR, it can be understood that the power backoff method of the present application is used for the ENDC MPR mechanism; when the frequency band used by the terminal device is millimeter wave, it can be understood that the power backoff method of the present application is applied to the millimeter wave MPR mechanism; when the network type of the terminal device is NTN, it can be understood that the power backoff method of the present application is used for the NTN MPR mechanism.

[0105] It should also be understood that the above embodiments may be coupled to each other, and this application does not limit this. Moreover, the size of the sequence number of each process does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of this application.

[0106] Combined with the above Figures 1 to 5 , describes in detail the power backoff method of the embodiment of the present application, and will be combined with Figure 6 and Figure 7 , a power fallback device according to an embodiment of the present application is described in detail.

[0107] Figure 6 A structural schematic diagram of a power back-off device 600 provided in one embodiment of the present application, the device 600 includes: an acquisition module 601 and a control module 602 .

[0108] Among them, the acquisition module 601 is used to obtain a first transmission power, where the first transmission power is the maximum power sent by the network device; the control module 602 is used to control the digital power module and / or analog power module in the terminal device to perform power backoff according to the maximum power backoff MPR and a preset adjustment factor when the power backoff is triggered according to the first transmission power and the backoff threshold; wherein the preset adjustment factor is determined based on the waveform peak-to-average ratio corresponding to the modulation mode of the terminal device and the nonlinear index of the terminal device, and the backoff threshold is determined based on the second transmission power and the MPR, and the second transmission power is the maximum transmission power supported by the terminal device.

[0109] In some embodiments, the control module 602 is specifically used to: compare the MPR and the preset adjustment factor; when the MPR is less than the preset adjustment factor, control the digital power module to perform power backoff; when the MPR is greater than or equal to the preset adjustment factor, control the digital power module and the analog power module to perform power backoff.

[0110] In some embodiments, the control module 602 is specifically configured to: determine the MPR as a power backoff value of the digital power module to achieve power backoff.

[0111] In some embodiments, the control module 602 is specifically used to: calculate the difference between the MPR and the preset adjustment factor to obtain a first difference; determine the first difference as the power back-off value of the analog power module, and the preset adjustment factor as the power back-off value of the digital power module to achieve power back-off.

[0112] In some embodiments, the power backoff device further includes: a judgment module. The judgment module is configured to judge whether the first transmit power triggers power backoff.

[0113] In some embodiments, the judgment module is specifically used to: obtain a backoff threshold, where the backoff threshold is the difference between the second transmit power and the MPR; compare the first transmit power and the backoff threshold; when the first transmit power is greater than the backoff threshold, determine that the first transmit power triggers power backoff; when the first transmit power is less than or equal to the backoff threshold, determine that the first transmit power does not trigger power backoff.

[0114] In some embodiments, the power backoff device further includes: a determination module. The determination module is used to determine that the actual transmit power of the terminal device is the difference between the second transmit power and the MPR when the first transmit power triggers the power backoff; the determination module is also used to determine that the actual transmit power of the terminal device is the first transmit power when the first transmit power does not trigger the power backoff limit.

[0115] In some embodiments, the control module 602 is further used to control the terminal device to transmit signals with the actual transmission power.

[0116] It should be understood that the device 600 here is embodied in the form of a functional module. The term "module" here may refer to an application specific integrated circuit (ASIC), an electronic circuit, a processor (such as a shared processor, a proprietary processor or a group processor, etc.) and a memory for executing one or more software or firmware programs, a merged logic circuit and / or other suitable components that support the described functions. In an optional example, those skilled in the art can understand that the device 600 can be specifically a terminal device in the above-mentioned embodiment, or the functions of the terminal device in the above-mentioned embodiment can be integrated in the device 600, and the device 600 can be used to execute the various processes and / or steps corresponding to the terminal device in the above-mentioned method embodiment. To avoid repetition, it will not be repeated here.

[0117] The above-mentioned device 600 has the function of implementing the corresponding steps executed by the terminal device in the above-mentioned method; the above-mentioned function can be implemented by hardware, or by hardware executing corresponding software. The hardware or software includes one or more modules corresponding to the above-mentioned function.

[0118] Figure 7 A structural schematic diagram of a power back-off device provided in another embodiment of the present application. Figure 7 The power back-off device shown may be used to execute the method of any one of the aforementioned embodiments.

[0119] like Figure 7 As shown, the device 700 of this embodiment includes: a memory 701, a processor 702, a communication interface 703 and a bus 704. The memory 701, the processor 702 and the communication interface 703 are connected to each other through the bus 704.

[0120] Among them, the processor 702 is used to: obtain a first transmission power, where the first transmission power is the maximum power sent by the network device; when the power backoff is triggered according to the first transmission power and the backoff threshold, control the digital power module and / or analog power module in the terminal device to perform power backoff according to the maximum power backoff MPR and a preset adjustment factor; wherein the preset adjustment factor is determined based on the waveform peak-to-average ratio corresponding to the modulation mode of the terminal device and the nonlinear index of the terminal device, and the backoff threshold is determined based on the second transmission power and the MPR, and the second transmission power is the maximum transmission power supported by the terminal device.

[0121] In some embodiments, the processor 702 is used to: compare the MPR and the preset adjustment factor; when the MPR is less than the preset adjustment factor, control the digital power module to perform power backoff; when the MPR is greater than or equal to the preset adjustment factor, control the digital power module and the analog power module to perform power backoff.

[0122] In some embodiments, the processor 702 is configured to: determine the MPR as a power backoff value of the digital power module to implement power backoff.

[0123] In some embodiments, the processor 702 is used to: calculate the difference between the MPR and the preset adjustment factor to obtain a first difference; determine that the first difference is the power back-off value of the analog power module, and the preset adjustment factor is the power back-off value of the digital power module to achieve power back-off.

[0124] In some embodiments, the processor 702 is used to: determine whether the first transmit power triggers power backoff.

[0125] In some embodiments, the processor 702 is used to: obtain a backoff threshold, where the backoff threshold is the difference between the second transmit power and the MPR; compare the first transmit power and the backoff threshold; when the first transmit power is greater than the backoff threshold, determine that the first transmit power triggers power backoff; when the first transmit power is less than or equal to the backoff threshold, determine that the first transmit power does not trigger power backoff.

[0126] In some embodiments, the processor 702 is used to: when the first transmit power triggers power backoff, determine that the actual transmit power of the terminal device is the difference between the second transmit power and the MPR; when the first transmit power does not trigger the power backoff limit, determine that the actual transmit power of the terminal device is the first transmit power.

[0127] In some embodiments, the processor 702 is used to: control the terminal device to transmit a signal with the actual transmission power.

[0128] The memory 701 may be a read only memory (ROM), a static storage device, a dynamic storage device or a random access memory (RAM). The memory 701 may store a program. When the program stored in the memory 701 is executed by the processor 702, the processor 702 is used to execute each step of the method shown in the above embodiment.

[0129] The processor 702 can adopt a general-purpose central processing unit (CPU), a microprocessor, an application specific integrated circuit (ASIC), or one or more integrated circuits to execute relevant programs to implement the various methods shown in the embodiments of the present application.

[0130] The processor 702 may also be an integrated circuit chip with signal processing capability. In the implementation process, each step of the method of the embodiment of the present application may be completed by an integrated logic circuit of hardware in the processor 702 or by instructions in the form of software.

[0131] The processor 702 may also be a general purpose processor, a digital signal processor (DSP), an ASIC, a field programmable gate array (FPGA) or other programmable logic device, a discrete gate or transistor logic device, or a discrete hardware component. The methods, steps, and logic block diagrams disclosed in the embodiments of the present application may be implemented or executed. The general purpose processor may be a microprocessor or the processor may be any conventional processor, etc.

[0132] The steps of the method disclosed in the embodiment of the present application can be directly embodied as being executed by a hardware decoding processor, or being executed by a combination of hardware and software modules in the decoding processor. The software module can be located in a mature storage medium in the art such as a random access memory, a flash memory, a read-only memory, a programmable read-only memory, or an electrically erasable programmable memory, a register, etc. The storage medium is located in the memory 701, and the processor 702 reads the information in the memory 701, and completes the functions required to be performed by the units included in the device of the present application in combination with its hardware.

[0133] The communication interface 703 may use, but is not limited to, a transceiver or other transceiver device to implement communication between the apparatus 700 and other devices or a communication network.

[0134] The bus 704 may include a path for transmitting information between various components of the device 700 (eg, the memory 701 , the processor 702 , and the communication interface 703 ).

[0135] It should be understood that the device 700 shown in the embodiment of the present application may be an electronic device, or may also be a chip configured in the electronic device.

[0136] It should be understood that in the various embodiments of the present application, the size of the serial numbers of the above-mentioned processes does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0137] Those of ordinary skill in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of this application.

[0138] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0139] In the several embodiments provided in the present application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0140] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0141] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0142] If the functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application can be essentially or partly embodied in the form of a software product that contributes to the prior art. The computer software product is stored in a storage medium and includes several instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the methods described in the various embodiments of the present application. The aforementioned storage media include: various media that can store program codes, such as USB flash drives, mobile hard disks, read-only memories (ROM), random access memories (RAM), magnetic disks or optical disks.

[0143] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A power backoff method, characterized in that: Applied to a terminal device, the method comprises: Obtaining a first transmit power, where the first transmit power is a maximum power sent by a network device; In the case where the power backoff is triggered according to the first transmit power and the backoff threshold, the digital power module and / or the analog power module in the terminal device is controlled to perform power backoff according to the maximum power backoff MPR and a preset adjustment factor; Among them, the preset adjustment factor is determined according to the waveform peak-to-average ratio corresponding to the modulation mode of the terminal device and the nonlinear index of the terminal device, and the back-off threshold is determined according to the second transmission power and the MPR, and the second transmission power is the maximum transmission power supported by the terminal device.

2. The method according to claim 1, characterized in that The controlling the digital power module and / or the analog power module in the terminal device to perform power backoff according to the maximum power backoff MPR and the preset adjustment factor includes: Comparing the MPR with the preset adjustment factor; When the MPR is less than the preset adjustment factor, controlling the digital power module to perform power fallback; When the MPR is greater than or equal to the preset adjustment factor, the digital power module and the analog power module are controlled to perform power backoff.

3. The method according to claim 2, characterized in that When the MPR is less than the preset adjustment factor, controlling the digital power module to perform power fallback includes: The MPR is determined as a power backoff value of the digital power module to achieve power backoff.

4. The method according to claim 2, characterized in that: When the MPR is greater than or equal to the preset adjustment factor, controlling the digital power module and the analog power module to perform power fallback includes: Calculating a difference between the MPR and the preset adjustment factor to obtain a first difference value; The first difference is determined as a power back-off value of the analog power module, and the preset adjustment factor is determined as a power back-off value of the digital power module, so as to achieve power back-off.

5. The method according to claim 1, characterized in that Before controlling the digital power module and / or the analog power module in the terminal device to perform power backoff according to the maximum power backoff MPR and the preset adjustment factor, the method further includes: Determine whether the first transmit power triggers power backoff.

6. The method according to claim 5, characterized in that The determining whether the first transmit power triggers power backoff includes: Obtaining a backoff threshold, where the backoff threshold is a difference between the second transmit power and the MPR; Comparing the first transmit power with the backoff threshold; When the first transmit power is greater than the backoff threshold, determining that the first transmit power triggers power backoff; When the first transmit power is less than or equal to the backoff threshold, it is determined that the first transmit power does not trigger power backoff.

7. The method according to claim 6, characterized in that The method further comprises: In a case where the first transmit power triggers power backoff, determining that the actual transmit power of the terminal device is a difference between the second transmit power and the MPR; When the first transmit power does not trigger the power backoff limit, the actual transmit power of the terminal device is determined to be the first transmit power.

8. The method according to claim 7, characterized in that The method further comprises: Control the terminal device to transmit a signal with the actual transmission power.

9. A power fallback device, characterized in that: The device comprises: An acquisition module, configured to acquire a first transmit power, where the first transmit power is a maximum power transmitted by a network device; A control module, configured to control the digital power module and / or the analog power module in the terminal device to perform power backoff according to the maximum power backoff MPR and a preset adjustment factor when determining that power backoff is triggered according to the first transmit power and the backoff threshold; Among them, the preset adjustment factor is determined according to the waveform peak-to-average ratio corresponding to the modulation mode of the terminal device and the nonlinear index of the terminal device, and the back-off threshold is determined according to the second transmission power and the MPR, and the second transmission power is the maximum transmission power supported by the terminal device.

10. An electronic device, characterized in that: The system comprises a processor and a memory, wherein the memory is used to store code instructions; the processor is used to run the code instructions to execute the method according to any one of claims 1 to 8.

11. A computer-readable storage medium, characterized in that: Used to store a computer program, the computer program comprising instructions for implementing the method according to any one of claims 1 to 8.

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