Method and system for controlling specific absorption rate in wireless communication device

Abstract

Disclosed are a method and system for controlling specific absorption rate in a wireless communication device, a computer-readable storage medium, and a wireless communication device. The method for controlling specific absorption rate comprises: when a wireless communication device is connected to a target frequency band, setting a plurality of sampling points to collect real-time transmission powers; on the basis of the real-time transmission powers, computing a power contribution weight at a moment corresponding to each sampling point, and writing the power contribution weight into an array; computing a cumulative average weight of the array at the current moment; and determining a control power upper limit for the wireless communication device at the next moment on the basis of the cumulative average weight, and controlling the transmit power of the wireless communication device at the next moment on the basis of the control power upper limit.

Description

Method and system for controlling the electromagnetic wave absorption ratio of wireless communication devices

[0001] Citation of relevant applications

[0002] This disclosure claims the entire benefits of Chinese Patent Application No. 202411011371.X, filed on July 26, 2024, with the State Intellectual Property Office of the People's Republic of China, entitled "Method and System for Controlling Electromagnetic Wave Absorption Ratio of Wireless Communication Devices", the entire contents of which are incorporated herein by reference.

[0003] field

[0004] This disclosure generally relates to the field of wireless communication, and more specifically to methods, systems, computer-readable storage media, and wireless communication devices for controlling the electromagnetic wave absorption ratio.

[0005] background

[0006] Based on the regulatory requirement that SAR (Specific Absorption Rate) measurement is the accumulated equivalent power per unit human body energy within any 6-minute time window, the solution employs a power upper limit approach. When the SAR is greater than or equal to the allowable fluctuation limit, the SAR power upper limit is lowered to the lower limit; when it is less than the limit, the power upper limit is raised. When the SAR's allowable fluctuation lower limit is reached, the power upper limit is increased to the higher limit. This allows for periods of high-power transmission within a certain time range, while maintaining the average power no greater than the SAR upper limit, ensuring good signal coverage for wireless communication devices during these periods.

[0007] However, because the human body absorbs different frequencies differently, and the radiation efficiency of antennas varies across different frequency bands—meaning that some frequency bands only reach the SAR limit at relatively high power, while others reach it at very low power—the SAR power limits may differ between frequency bands. Consequently, the SAR upper limit power (PL), the SAR allowable fluctuation upper limit (PLu), and the SAR allowable fluctuation lower limit (PLd) may differ for each frequency band. When switching frequency bands, the SAR upper limit also changes, and during this process, it is common for the instantaneous average power to exceed the SAR power limit.

[0008] Overview

[0009] On the one hand, this disclosure provides a method for controlling the electromagnetic wave absorption ratio of a wireless communication device, which includes:

[0010] When the wireless communication device is connected to the target frequency band, several sampling points are set to collect the real-time transmission power;

[0011] Calculate the power contribution weight for each sampling point at the corresponding time based on the real-time transmission power, and write the power contribution weight into an array;

[0012] Calculate the cumulative average weight of the array at the current time; and

[0013] The upper limit of the control power of the wireless communication device at the next moment is determined based on the cumulative average weight, and the transmission power of the wireless communication device at the next moment is controlled based on the upper limit of the control power.

[0014] In some implementations, the electromagnetic wave absorption ratio control method further includes:

[0015] The upper limit of high power, the upper limit of low power, and the upper limit of electromagnetic wave absorption ratio are set for the wireless communication device in each frequency band to control the upper limit of power.

[0016] In some implementations, before calculating the power contribution weight for each sampling point based on the real-time transmit power and writing the power contribution weight into the array, the method further includes:

[0017] Set a power sampling interval, and create an array of corresponding length according to the power sampling interval to store real-time power weight values. The initial real-time power weight values ​​of each sampling point in the array based on the power sampling interval are all 0.

[0018] In some implementations, calculating the power contribution weight based on the real-time transmit power includes:

[0019] The power contribution weight is determined by controlling the upper limit of the power based on the transmission power at the sampling point and the electromagnetic wave absorption ratio under the target frequency band.

[0020] In some implementations, calculating the cumulative average weight of the array at the current time includes:

[0021] The cumulative average weight of the array is determined by the quotient of the sum of the power contribution weights at each moment and the total duration up to the current moment.

[0022] In some implementations, determining the control power limit of the wireless communication device at the next time step based on the cumulative average weight includes:

[0023] The control power limit of the wireless communication device at the next moment is determined based on the cumulative average weight, the power contribution weight, the current high power limit, and the current low power limit.

[0024] In some embodiments, determining the control power upper limit of the wireless communication device at the next moment according to the cumulative average weight, the power contribution weight, the high power upper limit at the current moment, and the low power upper limit at the current moment includes:

[0025] Let the cumulative average weight be Sum_PW, the power contribution weight be APW, the length of the array be N, the high power upper limit at the current moment i be Pui, the low power upper limit at the current moment i be Pdi, the electromagnetic wave absorption ratio control power upper limit at the current moment i be PLi, j represents the jth sampling point, the cumulative electromagnetic wave absorption ratio weight ratio control upper limit SAR_PW_U, and the cumulative electromagnetic wave absorption ratio weight ratio control lower limit SAR_PW_L;

[0026] State 1: If Sum_PW - APW[j + 1] / N + Pui / N / PLi < SAR_PW_U, then the electromagnetic wave absorption ratio control power upper limit at the next moment is the high power upper limit Pui at the current moment;

[0027] State 2: If Sum_PW - APW[j + 1] / N + Pui / N / PLi ≥ SAR_PW_U, then the electromagnetic wave absorption ratio control power upper limit at the next moment is Pdi;

[0028] State 3: If Sum_PW - APW[j + 1] / N + Pdi / N / PLi ≥ SAR_PW_U, then the electromagnetic wave absorption ratio control power upper limit at the next moment is (Sum_PW - APW[j + 1] / N) * PLi * N;

[0029] State 4: If Sum_PW - APW[j + 1] / N + Pdi / N / PLi ≤ the cumulative SAR weight ratio control lower limit SAR_PW_L, then the electromagnetic wave absorption ratio control power upper limit at the next moment is Pui;

[0030] State 5: When none of States 1 to 4 are satisfied, if the control power upper limit at the current moment is Pu, then the electromagnetic wave absorption ratio control power upper limit at the next moment is Pui;

[0031] State 6: When none of States 1 to 3 are satisfied, if the control power upper limit at the current moment is Pd, then the electromagnetic wave absorption ratio control power upper limit at the next moment is Pdi.

[0032] On the other hand, the present disclosure also provides an electromagnetic wave absorption ratio control system for a wireless communication device, which includes:

[0033] A power acquisition module configured to set a plurality of sampling points to collect the real-time transmission power when the wireless communication device is connected to the target frequency band;

[0034] The weight calculation module is configured to calculate the power contribution weight of each sampling point at the corresponding time based on the real-time transmission power, and write the power contribution weight into an array;

[0035] The cumulative weight calculation module is configured to calculate the cumulative average weight of the array at the current time; and

[0036] The power control module is configured to determine the upper limit of the control power of the wireless communication device at the next moment based on the cumulative average weight, and control the operation of the wireless communication device based on the upper limit of the control power.

[0037] In another aspect, this disclosure also provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the electromagnetic wave absorption ratio control method described in this disclosure.

[0038] In another aspect, this disclosure also provides a wireless communication device, which includes a memory and a processor, wherein the memory stores a computer program, and the processor implements the electromagnetic wave absorption ratio control method of this disclosure when it calls the computer program in the memory.

[0039] In some implementations, when performing electromagnetic wave absorption ratio (SAR) control, a power contribution weight is introduced as a calculation parameter. Instead of directly using average power to calculate the upper limit of SAR control, the average power control of the SAR is controlled by calculating the average power weight. This addresses the issue of inconsistent contributions of the same power to the SAR during frequency band switching, which can lead to uncontrolled average power control of the SAR and avoid the risk of the SAR actually exceeding the limit. In some implementations, this disclosure eliminates the need for SAR testing using power or distance sensors, without increasing or decreasing material costs, ensuring that the wireless communication device can maintain high-power transmission during certain time periods.

[0040] Brief description of the attached figures

[0041] To more clearly illustrate the technical solutions of the embodiments of this disclosure, the accompanying drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0042] Figure 1 is a flowchart of an electromagnetic wave absorption ratio control method for a wireless communication device provided in an embodiment of the present disclosure;

[0043] Figure 2 is a schematic diagram of the electromagnetic wave absorption ratio control system structure of a wireless communication device provided in an embodiment of this disclosure; and

[0044] Figure 3 is a structural diagram of a wireless communication device provided in an embodiment of this disclosure.

[0045] Detailed Explanation

[0046] To make the objectives, technical solutions, and advantages of the embodiments of this disclosure clearer, the technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this disclosure, and not all embodiments. Based on the embodiments of this disclosure, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this disclosure.

[0047] Referring to Figure 1, which is a flowchart of an electromagnetic wave absorption ratio control method for a wireless communication device according to an embodiment of the present disclosure, the method includes:

[0048] S101: When the wireless communication device is connected to the target frequency band, several sampling points are set to collect the real-time transmission power;

[0049] S102: Calculate the power contribution weight for each sampling point at the corresponding time based on the real-time transmission power, and write the power contribution weight into an array;

[0050] S103: Calculate the cumulative average weight of the array at the current time; and

[0051] S104: Determine the upper limit of the control power of the wireless communication device at the next moment based on the cumulative average weight, and control the transmission power of the wireless communication device at the next moment based on the upper limit of the control power.

[0052] To facilitate understanding, the power-related terms used in this disclosure will be explained first:

[0053] The maximum power limit refers to the maximum transmission power used by the device during the testing phase in a shielded environment to measure its radiation performance. The minimum power limit refers to the maximum transmission power under normal operating conditions. For example, when a mobile phone establishes a connection through a cellular network, although it initially uses higher power, it quickly reduces the transmission power through adaptive power control to reduce battery consumption and potential harm to the human body.

[0054] SAR upper limit power refers to the maximum transmit power that the device can emit, which does not exceed the safety standard.

[0055] The SAR allowable fluctuation limit refers to the maximum transmit power that a wireless device can achieve during signal transmission, provided that SAR safety standards are met. This limit is to ensure that even when the device is transmitting at high power, the radio frequency energy absorbed by the human body does not exceed internationally recognized safety standards.

[0056] The lower limit of allowable SAR fluctuation refers to the minimum value that the transmission power of a wireless device can reach during signal transmission while meeting the SAR safety standard. This lower limit is to ensure the reliability and stability of communication even when the device transmits at low power.

[0057] In the above concepts, SAR upper limit power > SAR upper limit of allowable fluctuation > SAR lower limit of allowable fluctuation, high power upper limit > SAR upper limit power, low power upper limit < SAR lower limit of allowable fluctuation, that is:

[0058] High power upper limit > SAR upper limit power > SAR upper limit of allowable fluctuation > SAR lower limit of allowable fluctuation > low power upper limit.

[0059] The following describes the method for controlling the specific absorption rate of the wireless communication device provided in the present disclosure:

[0060] When the wireless communication device is connected to the target frequency band, collect the real-time transmission power of the wireless communication device at the current moment. Here, the target frequency band is not specifically limited, and it can be any frequency band in which the wireless communication device can operate.

[0061] It should be noted that for each frequency band, there are corresponding high power upper limits, low power upper limits, and specific absorption rate control power upper limits (hereinafter referred to as SAR control power upper limits). That is, before the wireless communication device communicates, the high power upper limit, low power upper limit, and SAR control power upper limit of the wireless communication device should be set in each frequency band. As shown in Table 1 below, Table 1 is a table of the frequency band and power relationship of the wireless communication device. Suppose the wireless communication device has m operating frequency bands, corresponding to m high power upper limits, m low power upper limits, and m SAR control power upper limits. And the high power upper limits, low power upper limits, and SAR control power upper limits corresponding to different frequency bands can be the same.

[0062] Table 1. Table of the frequency band and power relationship of the wireless communication device

[0063] [[ID=***]]

[0064] In some embodiments, when the wireless communication device is connected to the frequency band Xi, set the initial power upper limit to Pui (the high power upper limit of frequency band i), and the soft control starts sampling to detect the real-time power. Let the real-time transmission power at the tth (0, 1, N - 1, N, N + 1,...) sampling point be RP, operating in the frequency band Xi. At this time, the power contribution weight at the tth sampling point is:

[0065] APW(t) = RP / PLi;

[0066] ​The power contribution weights can then be written to an array, for example, APW(t) can be written to an array. This embodiment assumes that the array has already been generated or obtained before writing the power contribution weights. There is no limitation on how the array is generated. In one feasible implementation, a power sampling interval can be set, and an array of corresponding length can be created based on the power sampling interval to store the real-time power weight values. The initial real-time power weight values ​​for each sampling point in the array based on the power sampling interval are all 0.

[0067] In some implementations, if the array length is N and the sampling interval is S seconds (S <= 100 ms), then the total number of samples, i.e., the array length, during the entire SAR measurement period, taking the legally required 6 minutes as an example, can be N = 360 / S. Since the initial real-time power weight values ​​are all 0, when the power contribution weight of the t-th sampling point is obtained, it is written into the t-th position of the array.

[0068] Calculate the cumulative average weight of the array at the current time. The average weight of the power contribution of the existing sampling points in the array at the corresponding time is calculated. Let the cumulative average weight be Sum_PW, then: Sum_PW=(APW[0]+APW[1]+….+APW[N-1]) / N;

[0069] After obtaining the cumulative average weight, the upper limit of the control power of the wireless communication device at the next moment can be determined based on the cumulative average weight, and the transmission power of the wireless communication device at the next moment can be controlled based on the upper limit of the control power.

[0070] When determining the transmit power at the next moment, it is necessary to determine the upper limit of the control power of the wireless communication device at the next moment based on the cumulative average weight, power contribution weight, the upper limit of the current high power, and the upper limit of the current low power.

[0071] To distinguish between the current control power limit and the control power limit for the next moment, the control power limit for the next moment is denoted as Ps. The method for determining the control power limit for the next moment is to continuously detect the real-time power of the sampling points and compare it with the real-time average power to adjust the maximum power of the next point. This ensures that within any measurement cycle (e.g., the legally mandated 6 minutes), the real-time average power weight remains within the set weight range.

[0072] In some embodiments, when calculating the control power upper limit at the next moment, it is necessary to first determine the cumulative SAR weight ratio control upper limit SAR_PW_U and the cumulative SAR weight ratio lower limit SAR_PW_L. The cumulative SAR weight ratio control upper limit SAR_PW_U can be determined according to the ratio of the high power upper limit Pu of each frequency band to the SAR control power upper limit, i.e., PL. Similarly, the cumulative SAR weight ratio control lower limit SAR_PW_L can be determined according to the ratio of the low power upper limit Pd of each frequency band to the SAR control power upper limit, i.e., PL.

[0073] When determining the control power upper limit Ps at the next moment, it is necessary to ensure that within the time window of any measurement period, the real-time average power weight is between SAR_PW_L and SAR_PW_U, so as to ensure that the SAR within any measurement minute meets the regulatory requirements.

[0074] In an actual network, the transmission interval of SRS (Sounding Reference Signal) is very short, so the actually accumulated average power will be very low, and the state of restricting the maximum power of SRS will not be triggered. This reduces the interference to other transmission activities and helps to extend the battery life of the terminal device. SRS is a signal used in the 5G communication system to estimate the uplink channel frequency domain information, which helps to achieve frequency selective scheduling and downlink beamforming.

[0075] When specifically determining the control power upper limit Ps at the next moment, the following method can be referred to:

[0076] Let the cumulative average weight be Sum_PW, the power contribution weight be APW, the length of the array be N, the high power upper limit at the current moment i be Pui, the low power upper limit at the current moment i be Pdi, the electromagnetic wave absorption ratio control power upper limit at the current moment i be PLi, j represents the jth sampling point, the cumulative electromagnetic wave absorption ratio weight ratio control upper limit SAR_PW_U, and the cumulative electromagnetic wave absorption ratio weight ratio control lower limit SAR_PW_L;

[0077] State 1: If Sum_PW - APW[j + 1] / N + Pui / N / PLi < SAR_PW_U, then the electromagnetic wave absorption ratio control power upper limit at the next moment is the high power upper limit Pui at the current moment;

[0078] State 2: If Sum_PW - APW[j + 1] / N + Pui / N / PLi ≥ SAR_PW_U, then the electromagnetic wave absorption ratio control power upper limit at the next moment is Pdi;

[0079] State 3: If Sum_PW-APW[j+1] / N+Pdi / N / PLi≥SAR_PW_U, then the upper limit of the electromagnetic wave absorption ratio control power at the next moment is (Sum_PW-APW[j+1] / N)*PLi*N;

[0080] State 4: If Sum_PW-APW[j+1] / N+Pdi / N / PLi≤cumulative SAR weight ratio control lower limit SAR_PW_L, then the upper limit of the electromagnetic wave absorption ratio control power at the next moment is Pui.

[0081] State 5: If none of the conditions in states 1 to 4 are met, and the upper limit of the control power at the current moment is Pu, then the upper limit of the control power for the electromagnetic wave absorption ratio at the next moment is Pui.

[0082] State 6: If none of the conditions in states 1 to 3 are met, and the upper limit of the control power at the current moment is Pd, then the upper limit of the control power for the electromagnetic wave absorption ratio at the next moment is Pdi.

[0083] In some implementations, when performing electromagnetic wave absorption ratio (SAR) control, a power contribution weight is introduced as a calculation parameter. Instead of directly using average power to calculate the upper limit of SAR control, the average power control of the SAR is controlled by calculating the average power weight. This addresses the issue of inconsistent contributions of the same power to the SAR during frequency band switching, which can lead to uncontrolled average power control of the SAR and avoid the risk of the SAR actually exceeding the limit. Furthermore, this disclosure eliminates the need for SAR testing using power or distance sensors, avoids any increase or decrease in material costs, and ensures that the wireless communication device can maintain high-power transmission during certain time periods.

[0084] In some implementation schemes, it can be done as follows:

[0085] The first step is to set the upper limit of high power, the upper limit of low power, and the upper limit of electromagnetic wave absorption ratio control power for the wireless communication device in each frequency band, and to calculate the upper limit of cumulative electromagnetic wave absorption ratio weight ratio control and the lower limit of cumulative electromagnetic wave absorption ratio weight ratio control.

[0086] The second step is to set the power sampling interval and create an array of corresponding length according to the power sampling interval.

[0087] The third step is to set several sampling points to collect real-time transmission power when the wireless communication device is connected to the target frequency band.

[0088] Step 4: Calculate the power contribution weight of each sampling point at the corresponding time based on the real-time transmission power, and write the power contribution weight into an array;

[0089] Step 5: Calculate the cumulative average weight of the array at the current time; and

[0090] Step 6: Determine the upper limit of the control power of the wireless communication device at the next moment based on the cumulative average weight, and control the transmission power of the wireless communication device at the next moment based on the upper limit of the control power.

[0091] Therefore, it can be seen that, except for the initial moment after the wireless communication device is powered on and connected to the frequency band, when its control power limit can use a high power limit or other default values, the control power limit for each subsequent moment is generated by the previous calculation cycle. It should be noted that the calculation cycle here does not necessarily have to be a continuous cycle; a sliding window calculation method can be used. Taking a 6-minute period with a 1-second sampling interval as an example, there are 360 ​​sampling points. The control power limit corresponding to the 361st sampling point can be determined by an array composed of the power contribution weights of the 1st to 360th sampling points, using the calculation method given above. Similarly, the control power limit for the 362nd sampling point can be determined by an array composed of the 2nd sampling point and the calculated control power limit for the 361st sampling point (a total of 360 sampling points), using the calculation method given above. At this point, the array can discard the corresponding data from the original first sampling point. Following this logic, the control power limit of the wireless communication device at the next moment is determined using a sliding window method based on the cumulative average weight.

[0092] Referring to Figure 2, which is a schematic diagram of the electromagnetic wave absorption ratio control system of a wireless communication device according to an embodiment of the present disclosure, the system includes:

[0093] The power acquisition module is configured to collect real-time transmission power at several sampling points when the wireless communication device is connected to the target frequency band.

[0094] The weight calculation module is configured to calculate the power contribution weight of each sampling point at the corresponding time based on the real-time transmission power, and write the power contribution weight into an array;

[0095] The cumulative weight calculation module is configured to calculate the cumulative average weight of the array at the current time; and

[0096] The power control module is configured to determine the upper limit of the control power of the wireless communication device at the next moment based on the cumulative average weight, and control the operation of the wireless communication device based on the upper limit of the control power.

[0097] In some implementations, the electromagnetic wave absorption ratio control system further includes:

[0098] The first setting module is configured to set the high-power upper limit, low-power upper limit, and electromagnetic wave absorption ratio control power upper limit of the wireless communication device in each frequency band.

[0099] In some embodiments, before the weight calculation module, the electromagnetic wave absorption ratio control system further includes:

[0100] The second setting module is configured to set the power sampling interval, create an array with a corresponding length according to the power sampling interval for storing real-time power weight values, and the initial real-time power weight values of each sampling point obtained based on the power sampling interval in the array are all 0.

[0101] In some embodiments, the weight calculation module includes:

[0102] The first determination unit is configured to determine the power contribution weight according to the transmission power at the sampling point time and the electromagnetic wave absorption ratio control power upper limit in the target frequency band.

[0103] In some embodiments, the cumulative weight calculation module includes:

[0104] The second determination unit is configured to determine the cumulative average weight according to the quotient of the sum of the power contribution weights at each time and the total duration up to the current time.

[0105] In some embodiments, the power control module is a module configured to determine the control power upper limit of the wireless communication device at the next moment according to the cumulative average weight, the power contribution weight, the high-power upper limit at the current moment, and the low-power upper limit at the current moment.

[0106] In some embodiments, the power control module adopts the following power control method:

[0107] Let the cumulative average weight be Sum_PW, the power contribution weight be APW, the length of the array be N, the high-power upper limit at the current moment i be Pui, the low-power upper limit at the current moment i be Pdi, the electromagnetic wave absorption ratio control power upper limit at the current moment i be PLi, j represents the jth sampling point, the cumulative electromagnetic wave absorption ratio weight ratio control upper limit be SAR_PW_U, and the cumulative electromagnetic wave absorption ratio weight ratio control lower limit be SAR_PW_L;

[0108] State 1: If Sum_PW - APW[j + 1] / N + Pui / N / PLi < SAR_PW_U, then the electromagnetic wave absorption ratio control power upper limit at the next moment is the high-power upper limit Pui at the current moment;

[0109] State 2: If Sum_PW-APW[j+1] / N+Pui / N / PLi≥SAR_PW_U, then the upper limit of the electromagnetic wave absorption ratio control power at the next moment is Pdi;

[0110] State 3: If Sum_PW-APW[j+1] / N+Pdi / N / PLi≥SAR_PW_U, then the upper limit of the electromagnetic wave absorption ratio control power at the next moment is (Sum_PW-APW[j+1] / N)*PLi*N;

[0111] State 4: If Sum_PW-APW[j+1] / N+Pdi / N / PLi≤cumulative SAR weight ratio control lower limit SAR_PW_L, then the upper limit of the electromagnetic wave absorption ratio control power at the next moment is Pui.

[0112] State 5: If none of the conditions in states 1 to 4 are met, and the upper limit of the control power at the current moment is Pu, then the upper limit of the control power for the electromagnetic wave absorption ratio at the next moment is Pui.

[0113] State 6: If none of the conditions in states 1 to 3 are met, and the upper limit of the control power at the current moment is Pd, then the upper limit of the control power for the electromagnetic wave absorption ratio at the next moment is Pdi.

[0114] This disclosure also provides a computer-readable storage medium having a computer program stored thereon, which, when executed, can perform the electromagnetic wave absorption ratio control method described in this disclosure. The storage medium may include various media capable of storing program code, such as a USB flash drive, a portable hard drive, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk.

[0115] This disclosure also provides a wireless communication device. Referring to FIG3, a structural diagram of a wireless communication device provided in an embodiment of this disclosure is shown in FIG3, which may include a processor 1410 and a memory 1420.

[0116] In some implementations, processor 1410 may include one or more processing cores, such as a quad-core processor, an octa-core processor, etc. Processor 1410 may be implemented using at least one hardware form selected from DSP (Digital Signal Processing), FPGA (Field-Programmable Gate Array), and PLA (Programmable Logic Array). Processor 1410 may also include a main processor and a coprocessor. The main processor, also known as a CPU (Central Processing Unit), is used to process data in the wake-up state; the coprocessor is a low-power processor used to process data in the standby state. In some embodiments, processor 1410 may integrate a GPU (Graphics Processing Unit), which is responsible for rendering and drawing the content required to be displayed on the screen. In some implementations, processor 1410 may also include an AI (Artificial Intelligence) processor, which is used to handle computational operations related to machine learning.

[0117] In some embodiments, memory 1420 may include one or more computer-readable storage media, which may be non-transitory. Memory 1420 may also include high-speed random access memory and non-volatile memory, such as one or more disk storage devices or flash memory devices. In this embodiment, memory 1420 is used to store at least the following computer program 1421, which, after being loaded and executed by processor 1410, is capable of implementing the relevant steps in the method disclosed by the wireless communication device side. In some embodiments, the resources stored in memory 1420 may also include operating system 1422 and data 1423, etc., and the storage method may be temporary storage or permanent storage. The operating system 1422 may include Windows, Linux, Android, etc.

[0118] In some embodiments, the wireless communication device may also include a display screen 1430, an input / output interface 1440, a communication interface 1450, a sensor 1460, a power supply 1470, and a communication bus 1480.

[0119] Of course, the structure of the wireless communication device shown in Figure 3 does not constitute a limitation on the wireless communication device in the embodiments of this disclosure. In practical applications, the wireless communication device may include more or fewer components than those shown in Figure 3, or combine certain components.

[0120] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. As the system provided in the embodiments corresponds to the method provided in the embodiments, the description is relatively simple; relevant parts can be found in the method section.

[0121] This document uses specific examples to illustrate the principles and implementation methods of this disclosure. The descriptions of the embodiments above are only for the purpose of helping to understand the methods and core ideas of this disclosure. It should be noted that those skilled in the art can make various improvements and modifications to this disclosure without departing from its principles, and these improvements and modifications also fall within the protection scope of the claims of this disclosure.

[0122] It should also be noted that, in this specification, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

Claims

1. A method for controlling the specific absorption rate (SAR) of a wireless communication device, comprising: collecting real-time transmit power at a plurality of sampling points when the wireless communication device is connected to a target frequency band; calculating a power contribution weight corresponding to each of the sampling points according to the real-time transmit power and writing the power contribution weight into an array; calculating a cumulative average weight of the array at a current time; and determining a control power upper limit of the wireless communication device at a next time according to the cumulative average weight and controlling the transmit power of the wireless communication device at the next time based on the control power upper limit. 2.The method of claim 1, further comprising: setting a high power upper limit, a low power upper limit and a SAR control power upper limit of the wireless communication device at each frequency band. 3.The method of claim 1 or 2, wherein before the calculating a power contribution weight corresponding to each of the sampling points according to the real-time transmit power and writing the power contribution weight into an array, the method further comprises: setting a power sampling interval and creating an array with a length corresponding to the power sampling interval for storing real-time power weight values, wherein initial real-time power weight values of each sampling point in the array based on the power sampling interval are all 0. 4.The method of any one of claims 1 to 3, wherein the calculating a power contribution weight according to the real-time transmit power comprises: determining the power contribution weight according to the transmit power at the time of the sampling point and the SAR control power upper limit at the target frequency band. 5.The method of any one of claims 1 to 4, wherein the calculating a cumulative average weight of the array at a current time comprises: determining the cumulative average weight of the array according to a quotient of a sum of power contribution weights at each time and a total time length up to the current time. 6.The method of any one of claims 1 to 5, wherein the determining a control power upper limit of the wireless communication device at a next time according to the cumulative average weight comprises: determining the control power upper limit of the wireless communication device at the next time according to the cumulative average weight, the power contribution weight, a high power upper limit at the current time and a low power upper limit at the current time. 7.The method of claim 6, wherein the determining the control power upper limit of the wireless communication device at the next time according to the cumulative average weight, the power contribution weight, a high power upper limit at the current time and a low power upper limit at the current time comprises: setting the cumulative average weight as Sum_PW, the power contribution weight as APW, the length of the array as N, a high power upper limit at the current time i as Pui, a low power upper limit at the current time i as Pdi, a SAR control power upper limit at the current time i as PLi, j representing a jth sampling point, a cumulative SAR weight ratio control upper limit as SAR_PW_U and a cumulative SAR weight ratio control lower limit as SAR_PW_L. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ State one: if Sum_PW-APW[j+1] / N+Pui / N / PLi<SAR_PW_U, then the upper limit of the electromagnetic wave absorption ratio control power in the next moment is the upper limit of the large power in the current moment Pui; State two: if Sum_PW-APW[j+1] / N+Pui / N / PLi≥SAR_PW_U, then the upper limit of the electromagnetic wave absorption ratio control power in the next moment is Pdi; State three: if Sum_PW-APW[j+1] / N+Pdi / N / PLi≥SAR_PW_U, then the upper limit of the electromagnetic wave absorption ratio control power in the next moment is (Sum_PW-APW[j+1] / N)*PLi*N; State four: if Sum_PW-APW[j+1] / N+Pdi / N / PLi≤cumulative SAR weight ratio control lower limit SAR_PW_L, then the upper limit of the electromagnetic wave absorption ratio control power in the next moment is Pui; State five: if the control power upper limit in the current moment is Pu, then the upper limit of the electromagnetic wave absorption ratio control power in the next moment is Pui when none of states one to four is met; State six: if the control power upper limit in the current moment is Pd, then the upper limit of the electromagnetic wave absorption ratio control power in the next moment is Pdi when none of states one to three is met.

8. An electromagnetic wave absorption ratio control system of a wireless communication device, comprising: a power collection module configured to set a plurality of sampling points to collect real-time transmission power when the wireless communication device is connected to a target frequency band; a weight calculation module configured to calculate a power contribution weight corresponding to a moment of each of the sampling points according to the real-time transmission power, and write the power contribution weight into an array; a cumulative weight calculation module configured to calculate a cumulative average weight of the array in a current moment; and a power control module configured to determine an upper limit of a control power of the wireless communication device in a next moment according to the cumulative average weight, and control the wireless communication device to operate based on the upper limit of the control power.

9. A computer readable storage medium having a computer program stored thereon, wherein the computer program is executed by a processor to implement the electromagnetic wave absorption ratio control method of any one of claims 1 to 7.

10. A wireless communication device comprising a memory and a processor, wherein the memory has a computer program stored therein, and the processor invokes the computer program in the memory to implement the electromagnetic wave absorption ratio control method of any one of claims 1 to 7.

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