Transmission power adjustment method, apparatus, and system

Abstract

This application discloses a transmission power adjustment method and apparatus, as well as a system. The method is applicable to an electronic device configured with multiple antennas. In the process of an electronic device transmitting a signal through multiple antennas, or before the electronic device transmits a signal through multiple antennas, the electronic device may determine whether to transmit a signal at a transmission power preset by the electronic device based on the positional relationship between the antennas. When the antennas are far away from each other, the antennas transmit signals at a transmission power preset by the electronic device, and when the antennas are close to each other, the electronic device reduces the transmission power of the antennas. In this way, when it is guaranteed that the user is within a safe radiation range, the communication performance can be improved as much as possible.

Description

[Technical field]

[0001] The present application relates to the field of terminals and communication technologies, and in particular to a transmission power adjustment method and apparatus, and system. [Background technology]

[0003] With the development of information technology, when enjoying various conveniences brought by electronic devices, users are increasingly concerned about the impact of electromagnetic radiation of electronic devices on human health. In this field, electromagnetic radiation is usually measured by using indicators such as Specific Absorption Rate (SAR) and Maximum Permissible Exposure (MPE). For example, electromagnetic radiation can be reduced by reducing SAR.

[0004] Usually, those skilled in the art reduce the electromagnetic radiation of electronic devices by reducing the transmission power of the antenna. However, reducing the transmission power of the antenna may deteriorate the communication quality. Therefore, in order to control the transmission power, it is necessary to consider the balance between reducing the transmission power and ensuring the communication quality.

[0005] Mobile phones are used as an example. Due to their powerful functions, existing mobile phones include multiple antennas, such as Wireless Fidelity (Wi-Fi) antennas, Bluetooth antennas, and Near Field Communication (NFC) antennas. Therefore, in the scenario where multiple antennas transmit signals simultaneously, how to accurately control the transmission power of antennas to ensure that users are within a safe electromagnetic radiation range and communication quality is not affected is currently an urgent problem to be solved. Summary of the Invention

[0006] The present application provides a transmission power adjustment method and apparatus, and a system. According to the method, when multiple antennas transmit signals simultaneously, the transmission power of each antenna can be adjusted based on the location relationship between the antennas, so as to ensure that the communication performance is improved as much as possible when a user is within a safe radiation range.

[0007] According to a first aspect, an embodiment of the present application provides a transmission power adjustment method. The electronic device includes a first antenna and a second antenna. The method includes: the electronic device obtains a first distance between the first antenna and the second antenna; the electronic device determines whether the first distance is greater than a first value; the electronic device determines a first transmission power of the first antenna and a second transmission power of the second antenna; if the first distance is greater than the first value, the first transmission power is less than or equal to a first limit power, the second transmission power is less than or equal to a second limit power, the first limit power is a maximum transmission power that satisfies an electromagnetic radiation standard when the electronic device transmits a signal only through the first antenna, and the second limit power is a maximum transmission power that satisfies an electromagnetic radiation standard when the electronic device transmits a signal only through the second antenna. When the first distance is less than a first value, a sum of a first exposure rate corresponding to the first transmission power and a second exposure rate corresponding to the second transmission power is less than or equal to 1, the first exposure rate being a ratio of the first transmission power to the first limit power and the second exposure rate being a ratio of the second transmission power to the second limit power. The electronic device transmits a signal at the first transmission power through the first antenna, and simultaneously, the electronic device transmits a signal at the second transmission power through the second antenna.

[0008] According to the method provided in the first aspect, the electronic device can determine how to determine the transmission power of the antennas based on the location relationship between the antennas. When the two antennas are far away from each other, the electronic device may not need to consider the superposition effect of the radiation of the two antennas, but only needs to make the transmission power of the two antennas equal to or less than the maximum transmission power of the two antennas that meets the electromagnetic radiation standard. In this way, the electronic device can increase the transmission power of the antennas as much as possible to ensure communication quality while ensuring user safety. When the two antennas are close to each other, the superposition effect of the radiation generated when the two antennas transmit signals simultaneously is obvious. The electronic device needs to consider the superposition effect of the radiation of the two antennas. In this case, the electronic device needs to ensure that the sum of the exposure rates of the two antennas is equal to or less than 1 to ensure that the radiation of the two antennas is still within a safe range. It can be seen that the electronic device can dynamically adjust the transmission power of the antennas based on the distance between the antennas to increase the flexibility of power adjustment.

[0009] With reference to the first aspect, in a possible implementation, an average transmission power of a first antenna within a first time period is less than or equal to a first transmission power, the first time period being less than or equal to a time period specified in an electromagnetic emissions standard.

[0010] In other words, the first transmission power may be the maximum transmission power of the first antenna determined by the electronic device, or may be the maximum average transmission power of the first antenna determined by the electronic device. If the first transmission power is the maximum average transmission power of the first antenna determined by the electronic device, the actual transmission power of the first antenna may be greater than the first transmission power or less than the first transmission power, as long as the average value of the actual transmission power does not exceed the first transmission power within a certain time period, i.e., within a first time period. In this way, the electronic device can dynamically adjust the transmission power of the antenna based on the actual signal transmission status of the antenna. When the signal of the antenna is weak, for example, when the antenna is blocked, the electronic device can increase the transmission power of the antenna for a short duration to ensure the communication quality of the antenna.

[0011] With reference to the first aspect, in a possible implementation, the average transmission power of the second antenna within a first time period is less than or equal to the second transmission power, and the first time period is less than or equal to a time period specified in an electromagnetic emissions standard.

[0012] In other words, the second transmission power may be the maximum transmission power of the second antenna determined by the electronic device, or may be the maximum average transmission power of the second antenna determined by the electronic device. If the second transmission power is the maximum average transmission power of the second antenna determined by the electronic device, the actual transmission power of the second antenna may be greater than the second transmission power or less than the second transmission power, as long as the average value of the actual transmission power does not exceed the second transmission power within a certain time period, i.e., within a first time period. In this way, the electronic device can dynamically adjust the transmission power of the antenna based on the actual signal transmission status of the antenna. When the signal of the antenna is weak, for example, when the antenna is blocked, the electronic device can increase the transmission power of the antenna in a short duration to ensure the communication quality of the antenna.

[0013] Referring to the first aspect, in a possible implementation, the transmission power of the second antenna is equal to or less than the second transmission power, or the average transmission power of the second antenna within a first time period is equal to or less than the second transmission power, the first time period being equal to or less than a time period specified in an electromagnetic emission standard.

[0014] In other words, similar to the first antenna, the second transmission power may be the maximum transmission power of the second antenna determined by the electronic device, or may be the maximum average transmission power of the second antenna determined by the electronic device. Similarly, if the second transmission power is the maximum average transmission power of the second antenna, the electronic device can dynamically adjust the transmission power of the antenna based on the actual signal transmission status of the antenna to increase the freedom of power adjustment.

[0015] With reference to the first aspect, in a possible implementation, the electronic device may make an average transmission power of a first antenna within a first time period equal to or less than a first transmission power by using a time averaging algorithm, and may make an average transmission power of a second antenna within the first time period equal to or less than a second transmission power by using a time averaging algorithm.

[0016] Referring to the first aspect, in a possible implementation, the electronic device stores a first setting table, the first setting table includes a first transmission power and a second transmission power, and when the first distance is greater than a first value, the electronic device determining the first transmission power of the first antenna and determining the second transmission power of the second antenna specifically includes: the electronic device determines the first transmission power of the first antenna and determines the second transmission power of the second antenna based on the first setting table.

[0017] In other words, the electronic device may store a single antenna power setting table or a limited transmission power setting table. The single antenna power setting table stores the maximum transmission power of an antenna when the antenna transmits a signal independently, i.e., the reference transmission power P RThe limit transmission power setting table is stored in advance in accordance with the regulatory requirements, i.e., the limit transmission power P L In this way, in a multi-antenna transmission scenario, the electronic device does not need to store the transmission power of the antennas when different antenna combinations transmit signals in the multi-antenna transmission scenario, and the electronic device only needs to store the transmission power of the antennas in a single-antenna transmission scenario, thereby reducing the transmission power setting word in the multi-antenna transmission scenario and reducing the memory occupied by the system.

[0018] With reference to the first aspect, in a possible implementation, the electronic device stores a second setting table, the second setting table including a first reference exposure rate and a second reference exposure rate, and when the first distance is greater than a first value, the electronic device determining a first transmission power of the first antenna and determining a second transmission power of the second antenna specifically includes:

[0019] The electronic device determines a first transmit power for the first antenna based on a first reference exposure rate and determines a second transmit power for the second antenna based on a second reference exposure rate, the first transmit power being a product of the first limited power and the first reference exposure rate, and the second transmit power being a product of the second limited power and the second reference exposure rate.

[0020] In other words, the electronic device can store a reference exposure rate setting table in advance and determine the transmission powers of the first antenna and the second antenna based on the reference exposure rates in the reference exposure rate setting table.

[0021] Referring to the first aspect, in a possible implementation, when the first distance is less than a first value, the electronic device determining a first transmission power of the first antenna and determining a second transmission power of the second antenna specifically includes: the electronic device determines a first exposure rate and a second exposure rate according to an exposure rate allocation method, the exposure rate allocation method including one or more of equal allocation, priority allocation, allocation based on a service type, allocation based on a signal strength, or allocation based on a ratio of exposure rates, and the electronic device determines the first transmission power of the first antenna based on the first exposure rate and determines the second transmission power of the second antenna based on the second exposure rate.

[0022] When the antennas are close to each other, the electronic device will adjust the exposure ratio of the antennas to reduce the overlapping effect of radiation when the two antennas transmit signals, ensuring that the user is in a safe radiation range.

[0023] With reference to the first aspect, in a possible implementation, the electronic device pre-sets a total exposure rate between the first antenna and the second antenna, the total exposure rate being the sum of the first exposure rate and the second exposure rate.

[0024] In other words, before the electronic device adjusts the transmission power of the antennas, the electronic device may preset a total exposure rate of the antennas, and the electronic device may allocate the exposure rate of each antenna based on the preset total exposure rate to further calculate the transmission power of each antenna.

[0025] With reference to the first aspect, in a possible implementation, when the first distance is less than a first value, the electronic device determining a first transmission power of the first antenna and determining a second transmission power of the second antenna specifically includes: the electronic device obtains a first reference exposure rate and a second reference exposure rate, the first reference exposure rate being a ratio of the first reference power to the first limit power, the second reference exposure rate being a ratio of the second reference power to the second limit power, the first reference power being less than or equal to the first limit power, the second reference power being less than or equal to the second limit power, and when a sum of the first reference exposure rate and the second reference exposure rate is less than or equal to 1, the electronic device determines the first reference power as the first transmission power and the electronic device determines the second reference power as the second transmission power.

[0026] In other words, if the transmission power of the antenna is preset in the electronic device, and the sum of the exposure ratios corresponding to the preset transmission power of the antenna is less than or equal to 1, it indicates that when the antenna transmits a signal at the preset transmission power, the superimposed radiation of the antenna is still in a safe radiation range. In this case, the electronic device can directly transmit a signal at the threshold transmission power to reduce the computation amount of the electronic device and accelerate the power adjustment process of the antenna.

[0027] With reference to the first aspect, in a possible implementation, the electronic device stores a first reference power, a second reference power, a first reference exposure rate, and a second reference exposure rate, or the electronic device stores a first reference power, a second reference power, a first limit power, and a second limit power, or the electronic device stores a first reference exposure rate, a second reference exposure rate, a first limit power, and a second limit power.

[0028] In other words, in order to determine the transmission power of the antenna with reference to the exposure rate, the electronic device may preset any two of the single antenna power setting table, the limited transmission power setting table, and the reference exposure rate setting table. In this way, the electronic device can obtain the transmission power of the antenna through calculation based on the preset setting table.

[0029] Referring to the first aspect, in a possible implementation, the electronic device pre-stores an antenna location relationship table, the antenna location relationship table is for determining a distance between a first antenna and a second antenna, and the electronic device obtaining the first distance between the first antenna and the second antenna specifically includes: the electronic device obtains the first distance between the first antenna and the second antenna based on the antenna location relationship table.

[0030] In other words, the electronic device may preset an antenna location relationship table, in which the electronic device can determine the distance between antennas in a multi-antenna transmission scenario based on the location relationship between antennas in the antenna location relationship table, and determine the method that can be used for these antennas to adjust the transmission power.

[0031] According to a second aspect, an embodiment of the present application provides an electronic device. The electronic device includes an identification module, an adjustment module, and a calculation module. The identification module obtains a first distance between a first antenna and a second antenna. The adjustment module determines whether the first distance is greater than a first value. The calculation module determines a first transmission power of the first antenna and a second transmission power of the second antenna. If the first distance is greater than the first value, the first transmission power is less than or equal to a first limit power, and the second transmission power is less than or equal to a second limit power, the first limit power being a maximum transmission power that satisfies an electromagnetic radiation standard when the electronic device transmits a signal only through the first antenna, and the second limit power being a maximum transmission power that satisfies an electromagnetic radiation standard when the electronic device transmits a signal only through the second antenna. When the first distance is less than a first value, a sum of a first exposure rate corresponding to the first transmission power and a second exposure rate corresponding to the second transmission power is less than or equal to 1, the first exposure rate being a ratio of the first transmission power to the first limit power, and the second exposure rate being a ratio of the second transmission power to the second limit power. The transmitting module transmits a signal at the first transmission power through the first antenna, and simultaneously, the electronic device transmits a signal at the second transmission power through the second antenna.

[0032] With reference to the second aspect, in a possible implementation, the transmission power of the first antenna is equal to or less than the first transmission power, or the average transmission power of the first antenna within a first time period is equal to or less than the first transmission power, the first time period being equal to or less than a time period specified in an electromagnetic emission standard.

[0033] Referring to the second aspect, in a possible implementation, the transmission power of the second antenna is equal to or less than the second transmission power, or the average transmission power of the second antenna within a first time period is equal to or less than the second transmission power, the first time period being equal to or less than the time period specified in the electromagnetic emission standard.

[0034] With reference to the second aspect, in a possible implementation, the storage module stores a first setting table, the first setting table including a first transmission power and a second transmission power, and when the first distance is greater than a first value, the adjustment module determines a first transmission power of the first antenna and determines a second transmission power of the second antenna based on the first setting table.

[0035] With reference to the second aspect, in a possible implementation, the electronic device stores a second setting table, the second setting table including a first reference exposure rate and a second reference exposure rate, and when the first distance is greater than a first value, the adjustment module determines a first transmission power of the first antenna based on the first reference exposure rate and determines a second transmission power of the second antenna based on the second reference exposure rate, the first transmission power being a product of the first limit power and the first reference exposure rate, and the second transmission power being a product of the second limit power and the second reference exposure rate.

[0036] With reference to the second aspect, in a possible implementation, when the first distance is less than a first value, the adjustment module determines a first exposure rate and a second exposure rate according to an exposure rate allocation method, where the exposure rate allocation method includes one or more of equal allocation, priority allocation, allocation based on service type, allocation based on signal strength, or allocation based on a ratio of exposure rates, and the adjustment module determines a first transmission power of the first antenna based on the first exposure rate and determines a second transmission power of the second antenna based on the second exposure rate.

[0037] With reference to the second aspect, in a possible implementation, the memory module pre-sets a total exposure rate for the first antenna and the second antenna, the total exposure rate being the sum of the first exposure rate and the second exposure rate.

[0038] With reference to the second aspect, in a possible implementation, if the first distance is less than a first value, the adjustment module obtains a first reference exposure rate and a second reference exposure rate, where the first reference exposure rate is a ratio of the first reference power to the first limit power, the second reference exposure rate is a ratio of the second reference power to the second limit power, the first reference power is less than or equal to the first limit power, and the second reference power is less than or equal to the second limit power, and if a sum of the first reference exposure rate and the second reference exposure rate is less than or equal to 1, the adjustment module determines the first reference power as the first transmission power, and the electronic device determines the second reference power as the second transmission power.

[0039] With reference to the second aspect, in a possible implementation, the storage module stores the first reference power, the second reference power, the first reference exposure rate, and the second reference exposure rate, or the electronic device stores the first reference power, the second reference power, the first limit power, and the second limit power, or the electronic device stores the first reference exposure rate, the second reference exposure rate, the first limit power, and the second limit power.

[0040] Referring to the second aspect, in a possible implementation, the storage module pre-stores an antenna location relationship table, the antenna location relationship table is for determining a distance between a first antenna and a second antenna, and the identification module obtains a first distance between the first antenna and the second antenna based on the antenna location relationship table.

[0041] According to a third aspect, an embodiment of the present application provides an electronic device including a display, a memory, one or more processors, a plurality of applications, and one or more programs. The one or more programs are stored in the memory. When the one or more processors execute the one or more programs, the electronic device is enabled to perform a method according to the first aspect or any one of the implementations of the first aspect.

[0042] According to a fourth aspect, an embodiment of the present application provides a computer-readable storage medium, the computer-readable storage medium including instructions, which when executed on an electronic device, enable the electronic device to perform a method according to the first aspect or any one of the implementations of the first aspect.

[0043] According to a fifth aspect, an embodiment of the present application provides a computer program product, which when executed on a computer, enables the computer to perform a method according to the first aspect or any one of the implementations of the first aspect. [Brief description of the drawings]

[0044] [Figure 1] 1 is a schematic diagram of a wireless communication system 10 according to an embodiment of the present application. [Diagram 2] FIG. 2 is a distribution diagram of SAR measured in a SAR testing process according to an embodiment of the present application. [Diagram 3] 1 is a schematic diagram of a hardware structure of an electronic device 100 according to an embodiment of the present application. [Figure 4] 1 is a schematic diagram of antenna positions of an electronic device 100 according to an embodiment of the present application. [Diagram 5] 1 is a schematic diagram of the software architecture of an electronic device 100 according to an embodiment of the present application. [Figure 6] 2 is a schematic diagram of the distribution of electromagnetic radiation generated by an antenna when the antenna transmits a signal, according to an embodiment of the present application; [Figure 7] 1 is a schematic diagram of a relationship between an actual transmission power and an adjusted transmission power of an electronic device 100 according to an embodiment of the present application. [Figure 8] FIG. 2 is a diagram of the principle of determining the transmission power of two antennas based on distance by an electronic device according to an embodiment of the present application; [Figure 9] 2 is a method flowchart of a transmission power adjustment method according to an embodiment of the present application; [Figure 10]2 is a method flowchart of a transmission power adjustment method according to an embodiment of the present application; [Figure 11] 1 is a schematic diagram of the structure of a transmission power adjusting device according to an embodiment of the present application; DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0045] The following describes the technical solutions in the embodiments of the present application with reference to the accompanying drawings. In the description of the embodiments of the present application, unless otherwise specified, " / " indicates "or". For example, A / B may indicate A or B. The term "and / or" in this specification only describes the association relationship between associated objects, and indicates that three relationships may exist. For example, A and / or B may indicate the following three cases: only A exists, both A and B exist, and only B exists. In addition, in the description of the embodiments of the present application, "multiple" means two or more.

[0046] The following terms "first" and "second" are intended for descriptive purposes only and should not be understood as an indication or suggestion of the relative importance of the indicated technical features or an implicit indication of their quantity. Thus, a feature qualified by "first" or "second" may explicitly or implicitly include one or more features. In the description of the embodiments of this application, unless otherwise specified, "plurality" means two or more than two.

[0047] For ease of understanding, the following first describes relevant terms and concepts used in the embodiments of this application.

[0048] When accessing a network, electronic devices such as mobile phones and tablets must comply with local laws and regulations. For example, a product must pass China Compulsory Certification (CCC) when accessing a network in China, a product must pass Conformite Europeenne (CE) certification when entering the European market, and a product must pass Federal Communication Commission (FCC) certification when entering the US market.

[0049] (1) Specific Absorption Rate (SAR)

[0050] SAR is a standard scale for measuring the absorption of electromagnetic energy generated by electronic devices such as mobile phones by human tissue. The unit of SAR is W / kg (watts per kilogram). A larger SAR indicates a larger effect of the electromagnetic radiation on the user, and a smaller SAR indicates a smaller effect. Currently, several regulatory agencies post electromagnetic energy absorption specifications and set SAR limits. The SAR limit is the maximum amount of electromagnetic energy allowed to be absorbed per kilogram of human tissue within a six-minute period. For example, the Federal Communication Commission (FCC) sets the SAR limit at 1.6 W / kg, and the European Telecommunications Standard Institute (ESTI) sets the SAR limit at 2.0 W / kg.

[0051] (2) Maximum Permissive Exposure (MPE)

[0052] Like SAR, MPE also describes the effect of electromagnetic energy generated by electronic devices such as mobile phones on the human body. MPE is measured in units of W / m 2 (Watts per square meter). A common measurement of MPE is the Power Density (PD), or the electromagnetic energy absorbed by the body per unit area.

[0053] Both SAR and MPE are radiation indicators that measure the electromagnetic energy absorbed by a human body model by using a device, and measure the radiation effect of an electronic device on the human body. SAR can be for measuring the effect of low-frequency (frequency below 6 GHz) radiation on the human body, and MPE can be for measuring the effect of high-frequency (frequency above 6 GHz) radiation on the human body.

[0054] (3) Total Exposure Ratio (TER)

[0055] As communication systems become more and more complex, electronic devices include more and more antennas. In SAR testing, all transmitting antennas and all possible antenna combinations included in the terminal device are required to be tested. If a single antenna transmits a signal, or if multiple antennas transmit signals simultaneously, regulatory requirements need to be met. If multiple antennas transmit signals, the total exposure rate is measured by TER.

[0056] The TER may be for measuring the effect of electromagnetic radiation of an electronic device on a human body when multiple antennas transmit signals simultaneously. The TER may be determined based on the aforementioned radiation indicators. The TER may be expressed according to Equation 1.

[0057]

number

[0058] SARn denotes the measured SAR value of the antenna when the nth antenna transmitting the low-frequency signal is in operation, and SAR n,limit denotes the SAR limit value of the nth antenna transmitting a low-frequency signal. In this specification, n=1, 2, ..., N, where N denotes the number of antennas transmitting a low-frequency (frequency less than 6 GHz) signal. PD m denotes the measured PD value of the antenna when the m-th antenna transmitting the high-frequency signal is in operation, and PD m,limit denotes the PD limit value of the mth antenna transmitting a high-frequency signal. In this specification, n=1, 2, ..., M, where M denotes the number of antennas transmitting high-frequency (frequency higher than 6 GHz) signals.

[0059] It can be seen that the total exposure rate is the sum of the exposure rates of all antennas transmitting signals. When multiple antennas transmit signals simultaneously and TER≦1, the impact of the electromagnetic energy generated by the electronic device on the human body is within a safe range.

[0060] SAR and MPE are measurements of electromagnetic radiation produced by antennas in different frequency bands (SAR describes the effects of low frequency (usually lower than 6GHz) radiation on the human body, and MPE generally describes the effects of high frequency (higher than 6GHz) radiation on the human body), and the total exposure rate is alternatively:

[0061]

number

[0062] ,or

[0063]

number

[0064] It should be noted that the sigma sigma can be expressed as:

[0065] (4) Time averaging algorithm

[0066] The time averaging algorithm may be for controlling the average transmission power of the electronic device within a certain period of time to be maintained at or below a fixed value, which may be a limited transmission power determined based on a regulatory limit value of the radiation indicator.

[0067] The electromagnetic energy measured by using SAR is absorbed by the human body within a certain time period. Therefore, the regulation allows a time-average algorithm to be used to calculate the average SAR value within a certain time period, and the average SAR value does not exceed the SAR limit value. When an electronic device transmits a signal through a single antenna, whether the transmission power of the electronic device meets the regulatory requirements can be measured according to Equation 2.

[0068]

number

[0069] SAR(t) is the instantaneous value of SAR, and T SAR indicates the maximum average duration permitted by the regulation, and SAR limit indicates the SAR limit value in the regulation. In other words, if the measured average SAR value is less than the SAR limit value during the time period that the electronic device transmits a signal, the transmission power of the electronic device meets the regulatory requirement.

[0070] Similar to MPE, when an electronic device transmits a signal through a single antenna, the average MPE value in a certain time period can be calculated by using a time averaging algorithm. Specifically, whether the transmission power of an electronic device meets the regulatory requirements can be measured according to Equation 3.

[0071]

number

[0072] In addition, when an electronic device transmits signals through multiple antennas and the operating frequencies of the antennas include high frequencies (frequency higher than 6 GHz) and low frequencies (frequency usually lower than 6 GHz), whether the transmission power of the electronic device meets the regulatory requirements can be measured according to Equation 4.

[0073]

number

[0074] If the sum of the average radiation indicator values ​​of multiple antennas over a period of time is less than or equal to the regulatory limit value of the radiation indicator, then the transmission power of the electronic device is found to meet the regulatory requirement.

[0075] FIG. 1 shows a wireless communication system 10 in accordance with the present application.

[0076] FIG. 1 illustrates an example of a wireless communication system 10 according to an embodiment of the present application. The wireless communication system 10 may include multiple wireless communication devices. A wireless communication connection is established between the multiple devices. An Android® system, a Windows® system, an iOS® system, a macOS® system, a Linux® system, HarmonyOS® (HarmonyOS, HOS), or another type of operating system may run on the devices in the wireless communication system 10. The operating systems of the devices in the wireless communication system 10 may be the same or different. This is not limited in the present application. As shown in FIG. 1, in some embodiments, the wireless communication system 10 includes electronic devices 100 to 107.

[0077] Electronic device 100 is a device for sending wireless signals, and electronic devices 101 to 107 are devices for receiving wireless signals.

[0078] The electronic device 100 may be a terminal device that directly provides communication services to a user, such as a mobile phone, a computer, a laptop, or a wireless headphone. The communication services may include a call service, a download service, a device connection service, and the like. The electronic devices 101 to 107 may be electronic devices that establish wireless communication connections to the electronic device 100, such as a mobile phone, a computer, a laptop, a smart watch, a smart band, smart glasses, a router, a satellite, and a base station. The wireless communication connection may be a Wi-Fi connection, an NFC connection, a Bluetooth connection, and the like. In the following embodiments, the terminal device may also be referred to as a terminal for short. The terminal device is usually an intelligent electronic device that can provide a user interface, interact with a user, and provide service functions to the user.

[0079] Correspondingly, to implement communication between the electronic device 100 and the electronic devices 101 to 107, a mobile communication module and a wireless communication module may be configured in the electronic devices 100 to 107 for communication. The mobile communication module may provide a wireless communication solution applied to the terminal, including the 2nd generation mobile communication technology (2G), the 3rd generation mobile communication technology (3G), the 4th generation mobile communication technology (4G), the 5th generation mobile communication technology (5G), etc. The wireless communication module may include a Bluetooth (BT) module, a wireless local area network (WLAN) module, etc. The Bluetooth module may provide a Bluetooth communication solution including one or more of classic Bluetooth (Bluetooth 2.1) and Bluetooth low energy (BLE). The WLAN module can provide WLAN communication solutions including one or more of wireless fidelity peer-to-peer (Wi-Fi P2P), wireless fidelity local area network (Wi-Fi LAN), and wireless fidelity software access point (Wi-Fi softAP).In some embodiments, Wi-Fi P2P means that devices in a wireless network can be connected to each other in a peer-to-peer manner without the need to use a wireless router, and in the Android system, it can also be referred to as wireless fidelity direct (Wi-Fi direct). Devices that establish a Wi-Fi P2P connection can exchange data (such as files, images, and videos) over Wi-Fi (which needs to be in the same frequency band) without connecting to a network or hotspot. Compared with that of Bluetooth, Wi-Fi P2P has advantages such as faster search speed, faster transmission speed, and longer transmission distance.

[0080] In the process of the electronic device 100 providing communication services to users, the electronic device 100 needs to send signals to other devices through an antenna, in which case the electromagnetic energy generated by the antenna may affect users who are near or in contact with the electronic device 100, and further affect human health.

[0081] Also, electronic device 100 may enable multiple antennas to simultaneously send signals to multiple electronic devices among electronic devices 101 to 107. For example, if electronic device 100 establishes a Wi-Fi connection to electronic device 103 by using Wi-Fi technology, electronic device 100 may enable Bluetooth to transmit signals to multiple electronic devices among electronic devices 101 to 107. 3 Establish a Bluetooth connection to the Wi-Fi network. In this case, the electronic device 100 needs to enable multiple antennas (Wi-Fi antenna and Bluetooth antenna) to transmit signals simultaneously. In this embodiment of the present application, the scenario in which the electronic device 100 enables multiple antennas to transmit signals simultaneously is referred to as a multi-antenna transmission scenario.

[0082] In this case, when the electronic device 100 enables multiple antennas to transmit signals within the wireless communication system 10, the electronic device 100 needs to control the transmission power of the multiple antennas to ensure that the user is within a safe radiation range.

[0083] It should be noted that the wireless communication system 10 shown in Fig. 1 is only for helping to explain the technical solutions provided in the embodiments of the present application, and does not constitute a limitation to the embodiments of the present application. In an actual service scenario, the wireless communication system 10 may include more or less electronic devices. The types of electronic devices, the quantity of electronic devices, the connection manner between electronic devices, etc. are not limited in the present application.

[0084] In a multi-antenna transmission scenario, to ensure that the electromagnetic radiation generated by the electronic device 100 when the electronic device 100 transmits a signal is within a safe radiation range, the electronic device 100 needs to limit the transmission power of each antenna to ensure that the transmission power meets the relevant regulatory requirements. In a specific implementation, the transmission power of each antenna may be limited to be less than a transmission power corresponding to a radiation indicator specified in the relevant regulation. For example, the radiation indicator may be a SAR or an MPE.

[0085] In one implementation, electronic device 100 may be configured with a multi-antenna power setting table. Before electronic device 100 transmits a signal, electronic device 100 may adjust its transmit power based on a power value in the multi-antenna power setting table to ensure that the transmit power of electronic device 100 does not exceed the power value.

[0086] The multi-antenna power setting table shows the power values ​​of the electronic device 100 under different antennas and different scenarios. The power values ​​are the maximum transmission powers allowed by the electronic device 100, and the transmission powers are equal to or less than the power values ​​in the regulatory requirements. In other words, if the electronic device 100 can determine the antennas to transmit signals and ensure that the transmission powers of these antennas do not exceed the power values ​​in the multi-antenna power setting table, user safety can be guaranteed.

[0087] Table 1 shows an example of a multi-antenna power setting table configured in electronic device 100 in a multi-antenna scenario.

[0088] [Table 1]

[0089] Scenario 1, Scenario 2, ..., and Scenario M may indicate scenarios in which the electronic device 100 transmits signals when the electronic device 100 is near different parts of a human body. Antennas X, Y, and Z may be antennas included in the electronic device 100. The power values ​​in the multi-power setting table may be obtained by the electronic device 100 by calculating based on the transmission power that meets the regulatory requirements when each antenna transmits a signal separately and with reference to TER≦1, or may be obtained through simulation testing, or may be obtained through testing in an actual test scenario.

[0090] In other words, the electronic device 100 is typically configured with two setting tables: a single-antenna power setting table and a multi-antenna power setting table.

[0091] The single antenna power setting table is a transmission power that satisfies the regulatory requirements when each antenna transmits a signal separately, i.e., a reference transmission power P RThe single antenna power setting table includes a reference transmission power P of the electronic device 100 in a single antenna transmission scenario and in different radiation indicator test scenarios of different antennas. R Reference transmission power P R is the maximum transmission power allowed for the electronic device 100, and the reference transmission power P R is the transmission power limit P L The single antenna transmission scenario is a scenario in which the electronic device 100 transmits a signal through one antenna. The limited transmission power P L It should be understood that is one of the transmission powers that meets the regulatory requirements in different radiation indicator test scenarios of different antennas in a single antenna transmission scenario.

[0092] In order to obtain the single antenna power setting table of the electronic device 100, the electronic device 100 is placed in a radiation indicator test environment for testing, and the reference transmission power P of each antenna in the single antenna power setting table is obtained. R It is necessary to determine:

[0093] Table 2 shows an example of a single antenna power setting table configured in electronic device 100 in a single antenna scenario when electronic device 100 is placed in a SAR test environment for testing.

[0094] [Table 2]

[0095] In this specification, N indicates the number of antennas of the electronic device 100, and M indicates the number of SAR test scenarios. Since the radiation values ​​that can be received by the user's head, torso, and limbs are different, there are different SAR limit values ​​for different parts of the user in the SAR specification. Therefore, the SAR test scenarios may include test scenarios in which the electronic device 100 is near different human body parts. For example, scenario 1 may indicate a scenario in which the SAR is tested when the electronic device 100 is near the user's head, and scenario 2 may indicate a scenario in which the SAR is tested when the electronic device 100 is near the user's torso. P R XY (X=1, 2, ..., M, Y=1, 2, ..., N) is the reference transmission power P of antenna X that is allowed when the electronic device 100 transmits a signal through antenna X in scenario Y. R Shows.

[0096] In the actual SAR test process, the electronic device 100 may be placed near a human body model, and whether the transmission power of the electronic device 100 meets the SAR specification is determined by measuring the SAR value of the human body model. Specifically, a chemical liquid may be used as the measurement liquid to simulate human tissue fluid. For example, when the measurement liquid is placed in a human head model, , electric The child device 100 is placed near a human head model. This can be used to simulate a test scenario in which the electronic device 100 is near the user's head. Then, when the electronic device 100 transmits a signal through the antenna, a probe is used to scan the measurement liquid, and the SAR value of the measurement liquid is measured by using the probe to determine whether the transmission power of the antenna complies with the SAR specification. In the test process, since the transmission power is directly proportional to the SAR value, whether the transmission power used in the test process meets the regulatory requirements is determined by adjusting the transmission power and by referring to the SAR test results to adjust each reference transmission power P in Table 2. R can be obtained.

[0097] FIG. 2 is an example of a SAR distribution map of test results generated when the electronic device 100 is close to the user's head, and the electronic device 100 has antenna 1 enabled with a power value of P R 2, it can be seen that the darker areas indicate the larger SAR value and the larger radiation of the area. The SAR value in area 1 is the largest. If the SAR value does not exceed the SAR specification, in the scenario where the electronic device 100 is close to the user's head, the antenna 1 of the electronic device 100 transmits a signal with its power value of P R Transmitting a signal with a transmit power of 11 meets the SAR regulatory requirements.

[0098] The multi-antenna power setting table is obtained through manual setting based on the single-antenna power setting table. Generally, to obtain the transmission power of each antenna in the multi-antenna power setting table, the back-off power needs to be manually introduced based on the transmission power of the antenna listed in the single-antenna setting table, so as to ensure that the user is still within a safe radiation range when the radiation of all antennas is superimposed when multiple antennas transmit power simultaneously. In this specification, the transmission power of the antenna in the multi-antenna power setting table is the transmission power of the antenna in the single-antenna power setting table minus the back-off power. For example, the power 1X is P R The power 1Y may be obtained by subtracting the first back-off power from P R The first back-off power may be obtained by subtracting the second back-off power from 12, where the first back-off power may or may not be equal to the second back-off power.

[0099] It can be seen that if the electronic device 100 transmits signals through antenna X and antenna Y, the power values ​​of antenna X and antenna Y in different scenarios (for example, the scenario where the antenna is close to the head and the scenario where the antenna is close to the body) need to be listed. If the electronic device 100 transmits signals through antenna X, antenna Y, and antenna Z, the power values ​​of antenna X, antenna Y, and antenna Z in different scenarios need to be listed. By analogy, if the electronic device 100 includes antennas X, Y, and Z, the cases where two antennas work simultaneously include antennas X and Y work simultaneously, antennas X and Z work simultaneously, and antennas Y and Z work simultaneously, and the cases where three antennas work simultaneously include antennas X, Y, and Z work simultaneously. In other words, if the electronic device includes three antennas, Table 1 should include the transmission power of each antenna in four antenna combinations in different scenarios.

[0100] In other words, in order to ensure that various possible cases are included in the multi-antenna power setting table in the actual signal transmission process, Table 1 needs to include the transmission power of each antenna in various antenna combinations in different scenarios. Therefore, when the electronic device 100 has a large number of antennas, the structure of the multi-antenna power setting table may be complicated. This increases the setting workload of the setting personnel and easily causes setting errors. The multi-antenna setting table also occupies a large memory.

[0101] Also, in the multi-antenna power setting table, the influence of the location relationship between the multiple antennas on the radiation is not taken into account. In the actual case, when the multiple antennas are far away from each other, the degree of overlap of the electromagnetic radiation generated by the multiple antennas is small, and the overlap effect is weak. Therefore, the transmission power of the multiple antennas may not need to be calculated with reference to TER≦1. Only when the multiple antennas are near each other, the degree of overlap of the electromagnetic radiation generated by the multiple antennas is large, and it can be considered that the radiation of the multiple antennas is overlapped. However, in the multi-antenna power setting table, the transmission power value is simply set for the multiple antennas by introducing back-off power when the multiple antennas are near each other. As a result, good communication performance cannot be guaranteed. The communication quality may be deteriorated due to the introduction of back-off power, and a phenomenon such as signal freezing may occur, and as a result, good communication performance cannot be guaranteed.

[0102] An embodiment of the present application provides a method for adjusting transmission power in a multi-antenna transmission scenario, which is applied to an electronic device configured with multiple antennas. Specifically, exposure rates are allocated to the transmitting antennas by determining the location relationship of the transmitting antennas and according to an exposure rate allocation method.

[0103] In the process of transmitting signals through multiple antennas, the electronic device 100 may first obtain location relationships between the multiple antennas, and select different exposure rate allocation policies to set the exposure rates of the multiple antennas based on the location relationships. The exposure rate allocation methods may include, but are not limited to, the following multiple approaches: equally allocating the exposure rates to the antennas, allocating the exposure rates based on a certain percentage coefficient, etc. Alternatively, the electronic device may preferentially allocate the exposure rates based on service types and / or allocate the exposure rates based on signal strength.

[0104] For example, in a dual antenna radiation scenario, the location relationship between antenna 1 and antenna 2 that transmit signals simultaneously is distance level 1 (e.g., short distance). The overlapping degree of the radiation of the two antennas at distance level 1 is large, and it is considered that exposure rate allocation method 1 is selected to calculate the transmission power of the two antennas. The exposure rate allocation method 1 may be to allocate the exposure rate to the antennas evenly, or to allocate the exposure rate based on a coefficient. If the location relationship between antenna 1 and antenna 2 that transmit signals simultaneously is distance level 2 (e.g., long distance phone), antenna 1 and antenna 2 may be set based on a single antenna exposure rate.

[0105] The electronic device predetermines a location relationship between antennas in a multi-antenna radiation state, and sets transmission power for dual antennas transmitting signals by using different exposure rate allocation policies, which can avoid manually setting the transmission power of antennas in a dual-antenna radiation scenario, and can ensure communication quality while ensuring that radiation indicators do not exceed regulatory values.

[0106] The electronic device can allocate the exposure rate based on antenna signal strength, service type, and different exposure rate allocation policies, which can ensure communication quality. For example, for antennas close to each other, a larger percentage of the exposure rate can be set for antenna 1 in data service, or a larger percentage of the exposure rate can be set for antenna 1 with a strong antenna signal.

[0107] In addition, after the electronic device 100 obtains the transmission power of the antenna, the electronic device 100 may set the obtained transmission power to the average power of the antenna by using a time averaging algorithm. In the actual signal transmission process, the electronic device 100 may make the average value of the transmission power in a certain time period less than or equal to the average power. In other words, the instantaneous power value of the antenna at different moments may be calculated by using a time averaging algorithm.

[0108] An embodiment of the present application further provides a transmission power adjustment method, which is applied to an electronic device configured with multiple antennas. For antennas that are far away from each other, the exposure rate allocation method is not used. Instead, the exposure rate allocation method is used for antennas that are close to each other.

[0109] In the transmission power adjustment method provided in the embodiments of the present application, in the process of transmitting signals through multiple antennas or before transmitting signals through the multiple antennas, the electronic device 100 may first obtain a location relationship between the multiple antennas, and based on the location relationship between the multiple antennas, select different policies for different antennas to set the transmission power of the antennas.

[0110] In the case of multiple antennas, when one antenna is far away from another antenna, the electronic device 100 may transmit signals at the antenna's reference transmit power, limited transmit power, preset transmit power, or transmit power calculated based on the exposure rate.

[0111] For example, the electronic device may determine that an antenna in the plurality of antennas whose distance to another antenna satisfies a first distance condition (e.g., greater than distance level 1) is a distant antenna, and an antenna in the plurality of antennas whose distance to another antenna satisfies a second distance condition (e.g., less than distance level 1) is a nearby antenna. In some embodiments, the nearby antennas are a set including at least two antennas.

[0112] In the case where there are antennas close to each other among the multiple antennas, the electronic device 100 adjusts the transmission power of the antennas close to each other to enable the total exposure ratio TER of the antennas close to each other to be less than or equal to 1. In a specific implementation, the electronic device 100 may preset the TER of these antennas close to each other, and then adjust the exposure ratios of these antennas close to each other according to an exposure ratio allocation method to further calculate the transmission power of these antennas.

[0113] The exposure rate allocation method may include, but is not limited to, the following approaches: evenly allocating exposure rates to antennas, preferentially allocating exposure rates to antennas, allocating exposure rates based on service type, allocating exposure rates based on a specific factor, allocating exposure rates based on signal strength, etc.

[0114] In particular, the electronic device may further determine the service type of each antenna and allocate different exposure rates to the different antennas. The electronic device may alternatively determine the signal strength of the different antennas and allocate different exposure rates to the different antennas.

[0115] In addition, after the electronic device 100 obtains the transmission power of the antenna, the electronic device 100 may set the obtained transmission power to the average power of the antenna by using a time averaging algorithm. In the actual signal transmission process, the electronic device 100 may make the average value of the transmission power in a certain time period less than or equal to the average power. In other words, the instantaneous power value of the antenna at different moments may be calculated by using a time averaging algorithm.

[0116] For example, in a dual antenna radiation scenario, when the two antennas are far away from each other, the electronic device 100 may transmit a signal with a large transmission power without considering the radiation effect between the two antennas. In this way, user safety is guaranteed and communication performance is guaranteed as much as possible. When the two antennas are close to each other, the electronic device 100 dynamically allocates the exposure rate of each antenna according to an exposure rate allocation method based on the principle of TER≦1 to further obtain an adjusted exposure rate, and calculates the transmission power of the antenna based on the exposure rate, so that the electronic device 100 can flexibly adjust the transmission power of each antenna. In this way, when the antennas are far away from each other, the transmission power of the antenna is reduced by a small amplitude, and when the antennas are close to each other, the transmission power of the antenna is reduced by a large amplitude. In addition, the electronic device 100 adjusts the reference transmission power P R Only the reference exposure rate ER and the location relationship between the antennas need to be stored in advance, and there is no need to set the transmission power of each antenna in each antenna combination in a multi-antenna scenario. This reduces the transmission power setting work in a multi-antenna scenario and reduces the memory occupied by the system. And the transmission power obtained by the electronic device 100 through calculation is determined as the average power of the antennas by using a time averaging algorithm. In this way, in the actual signal transmission process, the electronic device 100 can dynamically adjust the power value of the antennas based on the actual case. This not only ensures that the user is within a safe radiation range within a certain time period, but also ensures the communication quality of the electronic device 100 as much as possible.

[0117] Reference transmission power P R is the transmission power preset by the electronic device 100 in accordance with regulations, and the power value is the limited transmission power P L The limit transmission power P L is the maximum transmit power that satisfies regulatory requirements. The antenna transmit power limit P L The reference transmission power P of the antenna for RThe ratio of is the reference exposure rate ER of the antenna.

[0118] The electronic device 100 may store the antenna location relationship table in advance, or may store any two of the single antenna power setting table, the reference exposure rate setting table, and the limited transmission power setting table in advance. Specifically, the single antenna transmission power setting table stores a reference transmission power P R The antenna location relationship table includes location relationships between the multiple antennas of the electronic device 100, and the limit transmission power setting table includes a limit transmission power P L The reference exposure rate setting table includes the reference exposure rate ER of each antenna.

[0119] For specific descriptions of the single antenna power setting table, the reference exposure rate setting table, and the antenna location relationship table, please refer to the following embodiments.

[0120] An embodiment of the present application further provides a transmission power adjustment method. The method is applied to a scenario in which two antennas transmit signals simultaneously. The electronic device 100 may obtain a distance between the two antennas. If the distance between the two antennas is greater than a first value, the electronic device may adjust the transmission powers of the two antennas to allow the transmission powers of the two antennas to be equal to or less than the maximum transmission powers of the two antennas that meet regulatory requirements, respectively. If the distance between the two antennas is less than a first value, the electronic device may determine the transmission powers of the two antennas on the premise that the sum of the exposure rates corresponding to the two antennas is equal to or less than 1. In this way, the electronic device 100 may determine based on the distance between the two antennas whether to calculate the transmission power of the antenna based on the information that the sum of the exposure rates is equal to or less than 1.

[0121] In the wireless communication system 10 shown in FIG. 1, the electronic device 100 may simultaneously obtain the location relationship between the multiple antennas before or during communication with one or more electronic devices in the electronic devices 101 to 107 through the multiple antennas. If an antenna is far away from another antenna, the electronic device 100 may transmit a signal at the reference transmission power of the antenna in the single antenna setting table, or transmit a signal at a preset transmission power. If there are antennas close to each other, the electronic device 100 obtains the reference transmission power of the antenna in the single antenna setting table and the reference exposure rate of the antenna in the reference exposure rate setting table, adjusts the exposure rate of the antenna according to the exposure rate allocation method, calculates the transmission power of the antenna, obtains the transmission power through calculation, and transmits the signal. Alternatively, the electronic device 100 may use a time averaging algorithm to ensure that the average power of the transmission power of the electronic device 100 in a certain time period does not exceed the final determined transmission power of these antennas.

[0122] FIG. 3 is a schematic diagram of the hardware structure of the electronic device 100.

[0123] The electronic device 100 may be a mobile phone, a tablet computer, a desktop computer, a laptop computer, a handheld computer, a notebook computer, an ultra-mobile personal computer (UMPC), a netbook, a cellular phone, or a personal digital assistant (PDA), an augmented reality (AR) device, a virtual reality (VR) device, an artificial intelligence (AI) device, a wearable device, an in-vehicle device, a smart home device, and / or a smart city device. The specific type of electronic device is not limited in the embodiments of this application.

[0124] The electronic device 100 may include a processor 110, an external memory interface 120, an internal memory 121, a universal serial bus (USB) port 130, a billing management module 140, a power management module 141, a battery 142, an antenna 1, an antenna 2, a mobile communication module 150, a wireless communication module 160, an audio module 170, a speaker 170A, a receiver 170B, a microphone 170C, a headphone jack 170D, a sensor module 180, buttons 190, a motor 191, indicators 192, a camera 193, a display 194, a subscriber identity module (SIM) card interface 195, and the like. The sensor module 180 may include a pressure sensor 180A, a gyro sensor 180B, an air pressure sensor 180C, a magnetic sensor 180D, an acceleration sensor 180E, a distance sensor 180F, an optical proximity sensor 180G, a fingerprint sensor 180H, a temperature sensor 180J, a touch sensor 180K, an ambient light sensor 180L, a bone conduction sensor 180M, and the like.

[0125] It may be understood that the structure shown in this embodiment of the invention does not constitute a specific limitation on the electronic device 100. In some other embodiments of the present application, the electronic device 100 may include more or fewer components than those shown in the figures, or some components may be combined, or some components may be separated, or different component arrangements may be used. The components shown in the figures may be implemented by hardware, software, or a combination of software and hardware.

[0126] The processor 110 may include one or more processing units. For example, the processor 110 may include an application processor (AP), a modem processor, a graphics processing unit (GPU), an image signal processor (ISP), a controller, a video codec, a digital signal processor (DSP), a baseband processor, a neural-network processing unit (NPU), etc. The different processing units may be separate components or may be integrated into one or more processors.

[0127] In some embodiments, the processor 110 can determine the transmission power of each antenna of the electronic device 100 based on the location relationship between the antennas. Specifically, when an antenna is far away from another antenna, the processor 110 can determine that the transmission power of the antenna is the reference transmission power. When the antennas are close to each other, the processor 110 can adjust the exposure ratios of the antennas that are close to each other according to an exposure ratio allocation method and calculate the transmission powers of the antennas that are close to each other.

[0128] The controller can generate an operation control signal according to the instruction operation code and the time series signal to complete the control of instruction reading and instruction execution.

[0129] A memory may further be disposed within the processor 110 and configured to store instructions and data. In some embodiments, the memory within the processor 110 is a cache memory. The memory may store instructions or data that have been used, or used periodically, by the processor 110. When the processor 110 needs to use the instructions or data again, the processor may retrieve the instructions or data directly from the memory. This avoids repeated accesses, reduces the waiting time of the processor 110, and improves system efficiency.

[0130] In some embodiments, the processor 110 may include one or more interfaces, which may include an inter-integrated circuit (I2C) interface, an inter-integrated circuit sound (I2S) interface, a pulse code modulation (PCM) interface, a universal asynchronous receiver / transmitter (UART) interface, a mobile industry processor interface (MIPI), a general-purpose input / output (GPIO) interface, a subscriber identity module (SIM) interface, a universal serial bus (USB) port, etc.

[0131] The wireless communication function of the electronic device 100 may be implemented by using antenna 1, antenna 2, antenna 3, mobile communication module 150, wireless communication module 160, a modem processor, a baseband processor, and the like.

[0132] Antenna 1, Antenna 2, and Antenna 3 are configured to transmit and receive electromagnetic wave signals. Each antenna in electronic device 100 may be configured to cover one or more communication frequency bands. Different antennas may be further multiplexed to improve antenna utilization. For example, Antenna 1 may be multiplexed as a diversity antenna of a wireless local area network. In some other embodiments, the antennas may be used in combination with tuning switches.

[0133] In some embodiments, the different antennas may be divided based on wireless communication technology. For example, antennas 1 to 3 may include a Wi-Fi antenna, a Bluetooth antenna, an NFC antenna, a GPS antenna, etc. Alternatively, the different antennas may be divided based on data transmitted through the antennas. For example, antennas 1 to 3 may include a data antenna, an audio antenna, etc.

[0134] The mobile communication module 150 may provide wireless communication solutions including 2G / 3G / 4G / 5G, etc., for application to the electronic device 100. The mobile communication module 150 may include at least one filter, switch, power amplifier, low noise amplifier (LNA), etc. The mobile communication module 150 may receive electromagnetic waves through the antenna 1, process the received electromagnetic waves, such as filtering or amplifying, and send the processed electromagnetic waves to the modem processor for demodulation. The mobile communication module 150 may further amplify the signal modulated by the modem processor and convert the amplified signal to electromagnetic waves for emission through the antenna 1. In some embodiments, at least some of the functional modules in the mobile communication module 150 may be disposed in the processor 110. In some embodiments, at least some of the functional modules of the mobile communication module 150 may be disposed in the same device as at least some of the modules of the processor 110.

[0135] The modem processor may include a modulator and a demodulator. The modulator is configured to modulate a low-frequency baseband signal to be transmitted into a medium-high frequency signal. The demodulator is configured to demodulate a received electromagnetic signal into a low-frequency baseband signal. The demodulator then transmits the low-frequency baseband signal obtained through demodulation to a baseband processor for processing. The low-frequency baseband signal is processed by the baseband processor and then transmitted to an application processor. The application processor outputs a sound signal through an audio device (which is not limited to the speaker 170A, the receiver 170B, etc.) or displays an image or video on a display 194. In some embodiments, the modem processor may be an independent component. In some other embodiments, the modem processor may be independent from the processor 110 and disposed in the same device as the mobile communication module 150 or another functional module.

[0136] In some embodiments, the modem processor may be configured to control the transmit power of the antennas and may be further configured to identify whether the electronic device 100 is in a multi-antenna transmission scenario.

[0137] The wireless communication module 160 may provide wireless communication solutions applied to the electronic device 100, including wireless local area network (WLAN) (e.g., wireless fidelity (Wi-Fi) network), Bluetooth (BT), global navigation satellite system (GNSS), frequency modulation (FM), near field communication (NFC) technology, infrared (IR) technology, etc. The wireless communication module 160 may be one or more components integrating at least one communication processing module. The wireless communication module 160 receives electromagnetic waves through the antenna 2 or antenna 3, performs demodulation and filtering processing on the electromagnetic wave signal, and sends the processed signal to the processor 110. The wireless communication module 160 may further receive signals to be transmitted from the processor 110, perform frequency modulation and amplification on the signal, and convert the obtained signal into electromagnetic waves for radiation through the antenna 2 or antenna 3.

[0138] In some embodiments, within the electronic device 100, antenna 1 is coupled to a mobile communication module 150, and antenna 2 and antenna 3 are coupled to a wireless communication module 160, such that the electronic device 100 can communicate with a network and another device by using wireless communication technologies. The wireless communication technologies may include global system for mobile communications (GSM), general packet radio service (GPRS), code division multiple access (CDMA), wideband code division multiple access (WCDMA), time-division code division multiple access (TD-SCDMA), long term evolution (LTE), BT, GNSS, WLAN, NFC, FM, IR technologies, etc. GNSS may include a global positioning system (GPS), a global navigation satellite system (GLONASS), a BeiDou navigation satellite system (BDS), a quasi-zenith satellite system (QZSS), and / or satellite based augmentation systems (SBAS).

[0139] In some embodiments, for the actual locations of antennas 1 to 3 in the electronic device 100, please refer to the structure of the electronic device shown in Figure 4. Figure 4(a) shows the rear cover side of the electronic device 100, and Figure 4(b) shows the location relationship of the antennas in the electronic device 100 after the rear cover of the electronic device 100 is removed. From Figure 4(b), it can be seen that antenna 1 is near the top of the electronic device 100 and far away from antennas 2 and 3, and antennas 2 and 3 are close to each other.

[0140] It may be understood that the electronic device 100 may include more or fewer antennas. The antenna locations shown in Figure 4 are merely illustrative examples and do not constitute limitations to the present application.

[0141] The electronic device 100 may implement display functions through a GPU, a display 194, an application processor, etc. The GPU is a microprocessor for image processing and is connected to the display 194 and the application processor. The GPU is configured to perform mathematical and geometric calculations and render images. The processor 110 may include one or more GPUs, which execute program instructions to generate or modify display information.

[0142] The display 194 is configured to display images, videos, etc. The display 194 includes a display panel. The display panel may be a liquid crystal display (LCD), an organic light-emitting diode (OLED), an active-matrix organic light-emitting diode (AMOLED), a flexible light-emitting diode (FLED), a mini-LED, a micro-LED, a micro-OLED, a quantum dot light-emitting diode (QLED), etc. In some embodiments, the electronic device 100 may include one or N displays 194, where N is a positive integer greater than 1.

[0143] The internal memory 121 may include one or more random access memories (RAMs) and one or more non-volatile memories (NVMs).

[0144] In some embodiments, the internal memory 121 may be configured to store an antenna location relationship table, and may be further configured to store any two of a single antenna power setting table, a limited transmission power setting table, and a reference exposure rate setting table. For specific descriptions of the single antenna power setting table, the reference exposure rate setting table, the limited transmission power setting table, and the antenna location relationship table, please refer to the following embodiments.

[0145] The random access memory may include static random access memory (SRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (SDRAM), double data rate synchronous dynamic random access memory (DDR SDRAM, e.g., fifth generation DDR SDRAM is commonly referred to as DDR5 SDRAM), etc. The non-volatile memory may include magnetic disk storage devices, flash memory, etc.

[0146] Flash memory can be classified into NOR flash, NAND flash, 3D NAND flash, etc. according to the operating principle, and can be classified into single-level cell (SLC), multi-level cell (MLC), triple-level cell (TLC), quad-level cell (QLC), etc. based on the number of potential levels of the cell; or can be classified into universal flash storage (UFS), embedded multimedia card (eMMC), etc. according to the memory specifications.

[0147] The random access memory may be directly read and written to by using the processor 110. The random access memory may be configured to store executable programs (e.g., machine instructions) within an operating system or another executable program, and may be further configured to store user data, application data, etc.

[0148] The non-volatile memory may also store executable programs, user data, application data, etc., which may be preloaded into the random access memory for direct reading and writing by using the processor 110.

[0149] The electronic device 100 may implement audio functions, such as music playback and recording, through an audio module 170, a speaker 170A, a receiver 170B, a microphone 170C, a headphone jack 170D, an application processor, and the like.

[0150] The electronic device may be a mobile terminal device with iOS, Android, Microsoft, or another operating system. For example, the mobile terminal device may be a mobile phone, a tablet computer, or a wearable device. Alternatively, the electronic device may be a non-mobile terminal device such as a laptop with a touch-sensitive screen or touch panel, or a desktop computer with a touch-sensitive screen or touch panel. The software system of the electronic device 100 may use a layered architecture, an event-driven architecture, a microkernel architecture, a microservices architecture, or a cloud architecture. In this embodiment of the present invention, the Android system with a layered architecture is used as an example to illustrate the software structure of the electronic device 100.

[0151] FIG. 5 is a block diagram of the software architecture of electronic device 100 according to one embodiment of the present invention.

[0152] In a layered architecture, the software is divided into several layers, each of which has a clear role and task. The layers communicate with each other through software interfaces. In some embodiments, the Android system is divided into four layers, namely, from top to bottom, the application layer, the application framework layer, the Android runtime and system libraries, and the kernel layer.

[0153] The application layer may include a series of application packages.

[0154] As shown in FIG. 5, the application package may include applications such as camera, gallery, calendar, phone, map, navigation, WLAN, Bluetooth, music, video, and messaging.

[0155] The application framework layer provides an application programming interface (API) and a programming framework for applications in the application layer. The application framework layer includes some predefined functions.

[0156] As shown in FIG. 5, the application framework layer may include a window manager, a content provider, a view system, a telephony manager, a resource manager, a notification manager, and the like.

[0157] A window manager is configured to manage window programs. A window manager may get the size of the display, determine if there is a status bar, perform screen locking, take screenshots, etc.

[0158] Content providers are configured to store and retrieve data and enable the data to be accessed by applications. Data may include video, images, audio, calls made and answered, browsing history and bookmarks, address books, etc.

[0159] The view system includes visual controls, such as controls for displaying text and controls for displaying images. The view system can be configured to build applications. A display interface can include one or more views. For example, a display interface that includes a notification icon for a message can include a text display view and an image display view.

[0160] The telephone manager is configured to provide communication functions for the electronic device 100, such as managing call status (including answering, rejecting, etc.).

[0161] The resource manager provides various resources to the application, such as localized strings, icons, images, layout files, and video files.

[0162] The notification manager allows applications to display notification information in the status bar and may be configured to communicate notification messages. The notification manager may disappear automatically after a short pause without requiring user interaction. For example, the notification manager is configured to notify of download completion, give a message notification, etc. The notification manager may alternatively be a notification that appears in the system's top status bar in the form of a graph or scrollbar text, for example a notification of an application running in the background, or a notification that appears on the screen in the form of a dialog window. For example, text information is displayed in the status bar, an announcement is given, the electronic device vibrates, or an indicator light flashes.

[0163] The Android runtime includes a kernel library and a virtual machine, and is responsible for scheduling and managing the Android system.

[0164] The kernel library includes two parts: the functions that need to be called in the Java language and the Android kernel library.

[0165] The application layer and the application framework layer run on a virtual machine. The virtual machine executes the java files of the application layer and the application framework layer as binary files. The virtual machine is configured to implement functions such as object life cycle management, stack management, thread management, security and exception management, and garbage collection.

[0166] The system library may include multiple functional modules, for example, a surface manager, a media library, a three-dimensional graphics processing library (eg, OpenGL ES), and a 2D graphics engine (eg, SGL).

[0167] The surface manager is configured to manage the display subsystem and perform blending of 2D and 3D layers for multiple applications.

[0168] The media library supports playback and recording of multiple commonly used audio and video formats, as well as still image files. The media library may support multiple audio and video encoding formats, such as MPEG-4, H.264, MP3, AAC, AMR, JPG, and PNG.

[0169] The 3D graphics processing library is configured to implement 3D graphics drawing, image rendering, compositing, layer processing, and the like.

[0170] The 2D graphics engine is a drawing engine for 2D drawing.

[0171] The kernel layer is a layer between the hardware and the software, and includes at least a display driver, a camera driver, an audio driver, and a sensor driver.

[0172] The following describes a transmission power adjustment method provided in one embodiment of the present application.

[0173] In some embodiments, the electronic device includes a single antenna power setting table. For a specific description of the single antenna power setting table, please refer to the above related content. The details will not be described again in this specification.

[0174] In some embodiments, the electronic device further stores limit transmission power data corresponding to different antennas. In some embodiments, the limit transmission power data may be stored in a memory of the electronic device 100 in the form of a configuration table.

[0175] The limit transmission power setting table is for different antennas and shows the limit transmission power P that meets the requirements of laws and regulations in different radiation test scenarios in single antenna transmission scenarios. L Table 3 shows an example of a limit transmission power setting table for the electronic device 100. Here, N indicates the number of antennas in the electronic device 100, and M indicates the number of SAR test scenarios. L XY (X=1, 2, ..., M, Y=1, 2, ..., N) is the limit transmission power P of antenna X that is allowed when the electronic device 100 transmits a signal through antenna X in scenario Y. L Shows.

[0176] [Table 3]

[0177] Similar to the single antenna power setting table, the power in the limited transmission power setting table is also obtained by placing the electronic device 100 in a radiation indicator test environment for testing, for example, in Table 3, the power can be the transmission power used by the antenna when the electronic device 100 is placed in a SAR test environment and the SAR value to be tested is equal to the SAR limit value. For details about the SAR test process, please refer to the related description of the single antenna power setting table. Alternatively, the power in the limited transmission power setting table can be obtained by simulation calculation. The manner of calculating the power in the limited transmission power setting table is not limited in the embodiment of the present application.

[0178] In some embodiments, the electronic device stores reference exposure rate setting data for different antennas, which may be stored in a memory of the electronic device in the form of a setting table.

[0179] The reference exposure rate setting table includes reference exposure rates ER for different antennas in different scenarios. Table 4 shows an example of a reference exposure rate setting table for the electronic device 100.

[0180] [Table 4]

[0181] The reference exposure rate of an antenna is determined by the reference transmission power P R The SAR is the ratio of the actual SAR generated when transmitting a signal at 100 to the SAR limit value in the SAR specification. If the exposure ratio is less than or equal to 1, the closer the antenna power is to the limit transmission power in the SAR specification, the greater the exposure ratio. In the single antenna power setting table configured in the electronic device 100, R does not exceed the power value in the SAR specification. However, the reference transmission power P Rcannot express the relationship with the limited transmission power in the SAR specification, and the reference exposure rate ER in the reference exposure rate setting table is R and the limited transmission power P L A ratio or value relationship between can be clearly shown.

[0182] For example, in scenario 1, the reference transmission power P R is 150mW, and based on the standard exposure rate setting table, the exposure rate of antenna 1 is 0.6. Power is directly proportional to SAR. The limit transmission power of antenna 1 in the SAR specification is P L1 If so, 150:P L1 = 0.6, so that the limiting transmit power of antenna 1 in the SAR specification is P L1 =150 / 0.6=250mW.

[0183] The ER of the antenna is ≦1. When ER=1, the allowable reference transmission power P R is the transmission power limit P in the SAR specification L It can be seen that it is equal to

[0184] It can be seen that the reference exposure rate setting table is related to the single antenna power setting table and the limited transmission power setting table of the antenna. R and the antenna's limited transmission power P L Since the ratio of P to the reference exposure rate ER of the antenna is the reference exposure rate ER of the antenna, in a practical case, the electronic device 100 can obtain a value in another setting table only by configuring it with any two of the single antenna power setting table, the limited transmission power setting table, and the reference exposure rate setting table. For example, when the electronic device 100 is configured with the single antenna power setting table and the reference exposure rate setting table, the limited transmission power P of the antenna is L (P L =P R / ER) is the reference transmission power P of the antenna in the single antenna power setting table R, and the reference exposure rate ER of the antenna in the reference exposure rate setting table.

[0185] In some embodiments, the electronic device further stores antenna position relationship data. It should be appreciated that the antenna position relationship data may also be stored in the memory of the electronic device in the form of a configuration table.

[0186] In a multi-antenna transmission scenario, the magnitude of the electromagnetic radiation of the electronic device 100 is further related to the positional relationship between the antennas transmitting the signals. When the antennas are close to each other, the electromagnetic radiation generated between the antennas is superimposed. When the antennas are far away from each other, the electromagnetic radiation generated between the antennas is not superimposed.

[0187] FIG. 6 is an example of a schematic diagram of the distribution of electromagnetic radiation of antennas at different positions of the electronic device 100 when the antennas transmit wireless signals simultaneously. The darker the color of the area where the antennas are located, the larger the SAR. FIG. 6(a) is a schematic diagram of the distribution of electromagnetic radiation generated by two antennas (antenna 1 and antenna 2) that are far away from each other when they transmit wireless signals simultaneously. It can be seen that since antenna 1 and antenna 2 are far away from each other, the electromagnetic radiation generated by antenna 1 and antenna 2 is not superimposed on each other, or the electromagnetic radiation generated after superimposition is small (smaller than the larger value in the SAR generated when antenna 1 or antenna 2 transmits wireless signals separately). Therefore, in this scenario, the maximum SAR value corresponds to the larger value in the SAR generated when antenna 1 and antenna 2 transmit wireless signals separately. FIG. 6(b) is a schematic diagram of the distribution of electromagnetic radiation generated by two antennas (antenna 2 and antenna 3) that are close to each other when they transmit wireless signals simultaneously. It can be seen that since antenna 2 and antenna 3 are close to each other, the electromagnetic radiation generated by antenna 2 and antenna 3 is superimposed, and the superimposed electromagnetic radiation is large (greater than the larger value among the SARs generated when antenna 3 or antenna 2 transmits radio signals separately). Thus, in this scenario, the maximum SAR value is greater than the larger value among the SARs generated when antenna 3 or antenna 2 transmits radio signals separately, and less than the sum of the SARs generated when antenna 3 and antenna 2 transmit signals simultaneously.

[0188] In this case, in the multi-antenna transmission scenario, the electronic device 100 refers to the positional relationship between the antennas to determine the reference transmission power P R , or to reduce the transmit power of each antenna.

[0189] In some embodiments, the antenna position relationship table may include the position relationship between the antennas, and the position relationship may be "close" or "far away". Alternatively, the position relationship may be at different distance levels, for example, a first distance and a second distance, where the first distance is greater than the second distance. Alternatively, the antenna position relationship table may include the distance between the antennas, for example, 1 centimeter. Table 5 shows an example of an antenna position relationship table for the electronic device 100.

[0190] [Table 5]

[0191] It can be understood that Table 5 only shows an example of the positional relationship between antennas in the electronic device 100. In another embodiment of the present application, the positional relationship between antennas can alternatively be expressed in another way. For example, a set indicates the positional relationship between antennas. Set 1 includes antenna 2 and antenna 3, and set 2 includes antenna 1. Radiation between antennas in the same set produces a superposition effect, and radiation between antennas in different sets does not produce a superposition effect, i.e., antenna 2 is close to antenna 3, and both antenna 2 and antenna 3 are far away from antenna 1. The definition of the positional relationship between antennas is not limited in the embodiment of the present application. In addition, alternatively, the antenna positional relationship table can be expressed as a radiation hotspot positional relationship table. This name is not limited in the present application.

[0192] The electronic device can allocate the exposure rates of the antennas by using different exposure rate allocation policies based on the positional relationship between the antennas.

[0193] Exposure allocation methods may include, but are not limited to, the following approaches:

[0194] (1) Distribute exposure rates evenly among antennas

[0195] In this case, the exposure ratios of the antennas are equal. Specifically, if the TER of the electronic device 100 is X and the number of the antennas is Y, the exposure ratio of the antennas is X / Y.

[0196] (2) Prioritize the allocation of exposure rates

[0197] In order to ensure that the communication quality of the antenna is optimal, the electronic device 100 may preferentially ensure that the exposure rate of the antenna is equal to or close to the reference exposure rate of the antenna in the reference exposure rate setting table, and then allocate the remaining exposure rate to another antenna.

[0198] (3) Allocating exposure rates based on service type

[0199] The service type may include voice service, data service, and the like.

[0200] In some embodiments, the electronic device 100 may prioritize the exposure rate of the antenna for transmitting the data service signal, so as to ensure the communication quality of the data transmission of the electronic device 100 .

[0201] (4) Allocating exposure rates based on exposure rate ratios.

[0202] The electronic device 100 may determine the exposure rate of each antenna in a multi-antenna transmission scenario based on the ratio of the reference exposure rate of the antenna in the reference exposure rate setting table.

[0203] For example, antennas 1 to 3 are close together in a multi-antenna transmission scenario, and the ratio of the reference exposure rates of the antennas in the reference exposure rate setting table is a:b:c. When the TER of the electronic device 100 is X, the adjusted exposure rate of antenna 1 is X×a / (a+b+c), the adjusted exposure rate of antenna 2 is X×b / (a+b+c), and the adjusted exposure rate of antenna 3 is X×c / (a+b+c).

[0204] (5) Allocating exposure rates based on signal strength

[0205] Specifically, the exposure rate allocated to a strong signal antenna may be less than the exposure rate allocated to a weak signal antenna, such that in a multi-antenna transmission scenario, a weak signal antenna may obtain a larger transmission power compared to another strong signal antenna to avoid signal outage of the weak signal antenna in the multi-antenna transmission scenario.

[0206] It may be understood that when the electronic device 100 allocates the exposure rate of the antenna, the electronic device 100 may calculate the exposure rate of the antenna according to one or more exposure rate allocation policies. For example, the electronic device 100 may first allocate the exposure rate of the antenna preferentially according to a method of allocating the exposure rate preferentially, and then another antenna may allocate the remaining exposure rate evenly according to an allocation method of allocating the exposure rate of the antenna evenly. In addition, in an embodiment of the present application, the electronic device 100 may further include another exposure rate allocation method. This is not limited in the present application.

[0207] In the multi-antenna transmission process, for multiple antennas close to each other, the electronic device 100 may adjust the exposure rate of each antenna according to the exposure rate allocation method, so that the total TER of the exposure rates of the antennas is less than or equal to 1, to ensure that the influence of the electromagnetic radiation of the electronic device 100 on the human body is within a safe range. For multiple antennas far away from each other, the electronic device 100 may adjust the exposure rate of each antenna according to the exposure rate allocation method, and the total TER of the exposure rates of the antennas may be greater than or equal to 1. In this way, the electronic device 100 can dynamically adjust the transmission power of multiple antennas far away from each other. For example, when antenna 1 and antenna 2 are far away from each other and the overlap of radiation between antenna 1 and antenna 2 is small, the electronic device 100 may allocate the exposure rates of antenna 1 and antenna 2 based on the signal strength. When the signal of antenna 1 is weaker than the signal of antenna 2, the electronic device 100 may adjust the exposure rate of antenna 1 to be greater than the exposure rate of antenna 2, so that antenna 1 can transmit a signal with a large transmission power, to ensure the communication performance of the antennas.

[0208] After the electronic device 100 obtains the adjusted exposure rate ER′ of each antenna, the electronic device 100 calculates the adjusted exposure rate ER′, the reference transmission power P R , and the reference exposure rate ER in the reference exposure rate setting table, the transmission power P of the antenna may be calculated.

[0209] Since power (in mW) is directly proportional to the exposure rate, the electronic device 100 may calculate the antenna transmission power P according to Equation 5.

[0210]

number

[0211] where ER is the reference exposure rate in the reference exposure rate setting table, ER' is the adjusted exposure rate calculated according to the exposure rate allocation method, and P Ris the reference transmission power in the single antenna power setting table, and P is the final adjusted transmission power.

[0212] In a multi-antenna transmission scenario, when a single antenna is far away from another antenna, the antenna R It can be understood that the signal may be transmitted at a reference transmit power in a single antenna transmission scenario as

[0213] In some embodiments, the electronic device may further calculate the instantaneous transmit power of the antenna based on the adjusted transmit power P of the antenna by using a time averaging algorithm.

[0214] The adjusted transmission power P obtained by the electronic device 100 through calculation may be the average transmission power of the antenna. In this case, if the average value of the actual transmission power within a period of time (e.g., 6 minutes) does not exceed the adjusted transmission power P, in the process of the antenna actually transmitting the signal, the instantaneous value of the actual transmission power may be greater than or less than the average transmission power.

[0215] 7 is an example of a schematic diagram of the relationship between the actual transmission power and the adjusted transmission power P in the process in which the electronic device 100 controls the transmission power by using a time averaging algorithm. From time 0 to t1, the instantaneous value of the actual transmission power of the electronic device 100 is P max 7 that, in order to control the average value of the transmission power to be equal to or less than the transmission power P, the electronic device 100 may reduce the actual transmission power by a certain value, for example, 3 dB, and transmit the signal at the low transmission power. The low transmission power is equal to or less than the stored power P. preserveThen, the electronic device 100 may increase the transmission power again and continue to transmit the signal at the high transmission power. In this way, the electronic device transmits the signal at the fluctuating transmission power such that the average value of the actual transmission power is equal to or less than the transmission power P. It can be seen that when the average value of the actual transmission power is equal to or less than the transmission power P, the actual power area is equal to or less than the average power area.

[0216] In conclusion, when the electronic device 100 adjusts the transmission power by using the time averaging algorithm, the electronic device 100 adjusts the transmission power by using the stored power P preserve However, the stored power P preserve is smaller than the transmitted power P, and the stored power P preserve The difference between the transmitted power P and the stored power P is a fixed value, for example, 3 dBm. preserve can enable the electronic device 100 to reduce the transmission power after transmitting a signal at a high transmission power, so that the average value of the actual transmission power does not exceed the transmission power P to ensure the safety of the user.

[0217] In practical cases, the electronic device adjusts the transmission power by using a time averaging algorithm to obtain the stored power P preserve When setting the antenna transmission power, the fluctuation amplitude of the antenna transmission power is too large, and the stability in the communication process is affected. In this case, the electronic device 100 sets the stored power P preserve Instead of setting , the maximum value of the actual transmission power may be limited to ensure that the electronic device 100 does not transmit signals with excessively fluctuating transmission power, thereby maintaining communication stability.

[0218] In this embodiment of the present application, in a multi-antenna radiation scenario, since the distances between the antennas are different, the electronic device 100 may determine the transmission power of the antennas based on different policies.

[0219] In a specific implementation, when the electronic device 100 is in a multi-antenna transmission scenario, the electronic device 100 may determine how the two antennas adjust the transmission power of the two antennas based on the distance between any two antennas.

[0220] The method is for determining the transmission power of an antenna. The method may include, but is not limited to, the following two cases:

[0221] (1) Directly determine the transmit power of each antenna based on a configuration table or a preset value.

[0222] The setting table may be a single antenna power setting table. In this case, the electronic device 100 sets the reference transmission power P R Alternatively, the setting table may be a limited transmission power setting table. In this case, the electronic device 100 may determine the transmission power of each antenna based on the limited transmission power P L Alternatively, the setting table may be a single-antenna exposure rate setting table. The electronic device 100 may set an exposure rate for each antenna based on the exposure rate in the single-antenna exposure rate setting table, and calculate the transmission power of each antenna based on the exposure rate and the limit transmission power of the single antenna. Alternatively, the electronic device 100 may preset a power value, where the preset power value is the limit transmission power P of all antennas. L Hereinafter, the electronic device 100 may determine the transmission power of the antenna based on a preset power value. For a specific description of the electronic device 100 directly determining the transmission power of the antenna based on a setting table or a preset value, please refer to the relevant description of the power adjustment method in the following method embodiment.

[0223] For example, when the distance between the two antennas is equal to or greater than distance level 1, the overlap of the radiation of the two antennas may be considered to be weak, and the electronic device 100 may directly determine the transmission power of each antenna based on a setting table or a preset value.

[0224] (2) Calculate the transmitting power of the antenna according to the exposure rate allocation method.

[0225] The electronic device 100 may calculate the exposure rate of the antenna according to an exposure rate allocation method.

[0226] Exposure rate allocation methods include allocating the exposure rates evenly to the antennas, allocating the exposure rates based on a certain proportionality factor, etc. Alternatively, the electronic device may preferentially allocate the exposure rates based on service type and / or allocate the exposure rates based on signal strength.

[0227] For example, when the distance between two antennas is less than distance level 1, the two antennas are close to each other and the overlapping degree of the radiation of the two antennas may be considered to be large. In this case, the transmission power of the antennas may be calculated according to the exposure rate allocation method.

[0228] The electronic device predetermines a positional relationship between antennas in a dual antenna radiation state and sets transmission powers for the dual antennas transmitting signals by using different policies, thereby avoiding manually setting the transmission powers of the antennas in a dual antenna radiation scenario and ensuring communication quality while ensuring that the radiation indicator does not exceed a regulation value.

[0229] Furthermore, when the electronic device 100 includes multiple antennas (three or more) and is in a multi-antenna transmission scenario, the electronic device 100 may determine the power values ​​of any two antennas based on the distance between the two antennas. Finally, the electronic device 100 determines the minimum power value of the antenna as the transmission power of the antenna. In this way, it is ensured that the antennas adjust the transmission power based on different policies at different distances, and the final transmission power of the antennas can enable the user to be within a safe radiation range.

[0230] In some embodiments, when the distances between the antennas are different, the electronic device 100 may determine the transmit power of the antennas based on different exposure rate allocation policies.

[0231] FIG. 8 illustrates an example of the principle of determining the transmission power of two antennas by the electronic device 100 based on the distance between the antennas.

[0232] As shown in FIG. 8, when the distance between the two antennas is at distance level 1, the electronic device 100 may calculate the transmission power of the two antennas according to the exposure rate allocation method 1. When the distance between the two antennas is at distance level 2, the electronic device 100 may calculate the transmission power of the two antennas according to the exposure rate allocation method 2. By analogy, when the distance between the two antennas is at distance level N, the electronic device 100 may calculate the transmission power of the two antennas according to the exposure rate allocation method N. The distance levels 1, 2, ..., N indicate different distances between the two antennas. The electronic device 100 may look at the distance between the two antennas based on the antenna position relationship table. The exposure rate allocation policies 1, 2, ..., and N indicate different exposure rate allocation policies.

[0233] The exposure rate allocation policy may include, but is not limited to, allocating exposure rates evenly to antennas, allocating exposure rates preferentially, allocating exposure rates based on service type, allocating exposure rates based on a specific factor, allocating exposure rates based on signal strength, etc.

[0234] For example, when the electronic device 100 transmits signals through antenna 1 and antenna 2 at the same time, the electronic device 100 may first preset a total exposure rate TER. When the distance between antenna 1 and antenna 2 is at distance level 1, the electronic device 100 may determine the exposure rates of antenna 1 and antenna 2 according to an exposure rate allocation method that allocates the exposure rates based on signal strength. When the distance between antenna 1 and antenna 2 is at distance level 2, the electronic device 100 determines the exposure rates of antenna 1 and antenna 2 according to a method that allocates the exposure rates evenly, and then obtains the transmission powers of antenna 1 and antenna 2 by calculation based on the exposure rates.

[0235] Referring to FIG. 9, the following describes a method flowchart of a transmission power adjustment method according to an embodiment of the present application.

[0236] As shown in FIG. 9, the method includes the following steps.

[0237] S101: Identify a multi-antenna transmission scenario.

[0238] The multiple antenna transmission scenarios include the following cases:

[0239] (1) Currently, electronic devices 100 transmit signals through multiple antennas simultaneously.

[0240] (2) The electronic device 100 intends to transmit signals simultaneously via multiple antennas within a first period of time.

[0241] When an electronic device transmits signals simultaneously through multiple antennas, several cases may be included:

[0242] (1) The electronic device 100 receives an instruction sent by a network device to instruct it to activate multiple antennas.

[0243] The network device may be a device such as a base station or a server. For example, the network device may determine whether to send instructions to the electronic device 100 to instruct it to activate multiple antennas based on the strength of the signal sent by the electronic device 100.

[0244] (2) The electronic device 100 simultaneously communicates with a network or another device by using different wireless communication technologies.

[0245] The wireless communication technologies mainly include Wi-Fi technology, Bluetooth technology, NFC technology, GNSS technology, etc. The electronic device 100 may include multiple antennas corresponding to different wireless communication technologies. For example, the antenna 1 of the electronic device 100 may be a Wi-Fi antenna, and the antenna 2 of the electronic device 100 may be a Bluetooth antenna.

[0246] Electronic device 100 may communicate directly with a network or another device by using different wireless communication technologies. For example, electronic device 100 may establish a Wi-Fi connection with electronic device 1 (e.g., a mobile phone or a computer) via antenna 1 and establish a Bluetooth connection with electronic device 2 (e.g., a Bluetooth headset, a smart band, or a smart watch) via antenna 2.

[0247] Alternatively, the electronic device 100 may transmit signals through multiple antennas when it executes multiple applications simultaneously. In this case, different applications use different wireless communication technologies. For example, in the process of the electronic device 100 executing an office application to upload a file, the electronic device 100 executes a phone application to make a phone call. In this case, the electronic device 100 may send a signal to a server corresponding to the office application through antenna 1 and a signal to a base station through antenna 2 to implement a call service with another device.

[0248] Specifically, the electronic device 100 may identify whether the electronic device 100 transmits wireless signals through multiple antennas by using a modem processor. The modem processor is configured to control the signal transmission process of the antennas and adjust the transmission power of the antennas. When the modem processor simultaneously controls the signal transmission of the multiple antennas, the electronic device 100 may determine that the electronic device 100 is currently in a multi-antenna transmission scenario.

[0249] S102: Obtain the positional relationship between the multiple antennas.

[0250] The multiple antennas may include an antenna that is transmitting or about to transmit a signal.

[0251] Specifically, the electronic device 100 may obtain the positional relationship between the antennas from an antenna positional relationship table. The positional relationship between the antennas may be "close" or "far away", or may be a specific distance between the antennas, or the positional relationship may be different distance levels, for example, a first distance and a second distance. For the specific contents of the antenna positional relationship table, please refer to the contents shown in Table 5.

[0252] In some embodiments, the antenna position relationship table may be stored in the internal memory 121 (e.g., NVM) of the electronic device 100.

[0253] S103: Implement power settings for different antennas according to different policies.

[0254] The electronic device 100 determines the distance between the antennas based on the positional relationship between the multiple antennas.

[0255] When an antenna is far away from another antenna, the electronic device 100 may transmit signals according to a power adjustment method.

[0256] An antenna being far away from another antenna can mean that the positional relationship between the antenna and the other antenna is "far away" or that the distance between the antenna and the other antenna is greater than a threshold or distance level, in which case the electromagnetic radiation of the antenna is not superimposed with the electromagnetic radiation of the other antenna when the antenna transmits a signal.

[0257] The power adjustment methods can be used by the electronic device 100 to obtain the transmission power of the antenna. The power adjustment methods are part of the policies used by the electronic device 100 to adjust the transmission power of the antenna. These policies are applicable to antennas whose radiation has no overlapping effect with the radiation of another antenna or has a weak overlapping effect of radiation. The power adjustment methods include, but are not limited to, several types:

[0258] (1) The electronic device 100 determines the reference transmission power P R Transmit a signal with.

[0259] Specifically, the electronic device 100 may transmit a signal at a power value in the single antenna power setting table, which may be set to a power value within the limit transmission power P in regulatory requirements to ensure that the user is within a safe radiation range. L not exceed.

[0260] (2) The electronic device 100 transmits a signal at a preset power value.

[0261] Specifically, the electronic device 100 may preset a preset power value. The preset power value is the limit transmission power P L When the antenna needs to transmit a signal according to the power adjustment method, the electronic device 100 does not need to look up the single antenna power setting table for the power value of the antenna, thereby reducing the time period for the electronic device 100 to determine the transmission power of the antenna and increasing the signal transfer rate of the antenna.

[0262] (3) The electronic device 100 has a limited transmission power P L Transmit a signal with.

[0263] Specifically, the electronic device 100 may transmit a signal at a power value in the limited transmission power setting table. In order to ensure that the transmission power is increased as much as possible when the user is within a safe radiation range, the power value may be set to a value less than the limited transmission power P in the regulatory requirements. L It is.

[0264] (4) The electronic device 100 adjusts the antenna transmit power based on the exposure rate.

[0265] Specifically, the electronic device 100 may preset the maximum exposure rate so that the exposure rate of the single antenna and the total exposure rate of the multiple antennas are both equal to or less than the maximum exposure rate. In this case, the electronic device 100 may set the preset maximum exposure rate, the reference transmission power P R , and the reference exposure rate ER of the antenna, the transmission power of the antenna can be calculated, and the signal can be transmitted at this transmission power. In this way, the electronic device 100 can preferentially satisfy the setting requirements of the electronic device 100, so that the antenna can transmit a signal based on the preset exposure rate.

[0266] For example, when the maximum exposure rate preset by the electronic device 100 is R1, antenna 1 is far away from another antenna, the reference transmission power of antenna 1 is P1, and the reference exposure rate of antenna 1 is R2, the transmission power of antenna 1 is R2 / R1×P1.

[0267] It can be understood that the power adjustment method is not limited to the above-mentioned several ways, which is not limited in this application.

[0268] It should be appreciated that in some embodiments, the amount of antennas in the electronic device 100 that are far away from another antenna is not limited. For example, in a three antenna radiation scenario of the electronic device 100, the distance between every two antennas exceeds a distance threshold, and the power is configured for each of the three antennas according to the power adjustment method.

[0269] When there are antennas close to each other, the electronic device determines whether the total reference exposure rate TER between the antennas close to each other is less than or equal to 1.

[0270] Antennas close to each other include three or more antennas. Antennas close to each other may mean that the positional relationship between these antennas is "close" or the distance between these antennas is less than a threshold or distance level. In this case, the electromagnetic radiation generated by these antennas is superimposed. The electronic device 100 needs to measure whether the electromagnetic radiation of the electronic device exceeds a standard value when these antennas transmit signals simultaneously based on the total reference exposure rate TER. It should be understood that in some embodiments, there may be an antenna that is far away from another antenna, and there may also be an antenna that is close to another antenna. For example, the electronic device 100 transmits a signal through three antennas. Antenna 1 is far away from both antenna 2 and antenna 3. The electronic device configures the transmission power for antenna 1 according to the power adjustment method. Antenna 2 is close to antenna 3. The electronic device determines whether the total reference exposure rate TER between antenna 2 and antenna 3 is less than or equal to 1 to configure the transmission power for antenna 2 and antenna 3.

[0271] The total reference exposure rate TER is the sum of the reference exposure rates ER of antennas close to each other. Specifically, the electronic device 100 may obtain the reference exposure rate ER of the antennas from the reference exposure rate setting table, or may calculate the reference exposure rate ER of the antennas based on the single antenna setting table and the limited transmission power setting table.

[0272] When the total reference exposure ratio TER between antennas close to each other is less than or equal to 1, the electronic device 100 sets the reference transmission power P R , or transmit a signal at a transmit power determined based on a preset exposure rate.

[0273] When the total reference exposure ratio is less than or equal to 1, it means that the electronic device 100 transmits the reference transmission power P R Therefore, the electronic device 100 does not exceed the standard value when transmitting a signal at the reference transmission power P R The signal may be transmitted at

[0274] Alternatively, the electronic device 100 may preset a total exposure rate TER, where the total exposure rate TER≦1. The electronic device 100 may allocate the exposure rates of these antennas close to each other based on the preset total exposure rate TER, and then calculate the transmission power of these antennas based on the exposure rates allocated to the antennas. Specifically, the electronic device 100 may allocate the exposure rates of the antennas according to an exposure rate setting method. The exposure rate allocation method may include, but is not limited to, methods such as evenly allocating the exposure rates to the antennas, preferentially allocating the exposure rates, allocating the exposure rates based on the service type, allocating the exposure rates based on a specific coefficient, and allocating the exposure rates based on the signal strength.

[0275] When the total reference exposure ratio TER is greater than 1, it indicates that the electromagnetic radiation of the electronic device 100 exceeds the standard value when the electronic device 100 transmits a signal at the reference transmission power, and the electronic device 100 needs to adjust the transmission power of the antennas close to each other. The electronic device 100 may adjust the transmission power of the antennas close to each other so that the total exposure ratio TER of the antennas close to each other is less than or equal to 1, and the antennas transmit signals at the adjusted transmission power.

[0276] For these antennas that are close to each other, the electronic device 100 may adjust the exposure rate of each antenna according to an exposure rate allocation method, and then the electronic device 100 may calculate the adjusted exposure rate ER′, the reference exposure rate ER, and the reference transmission power P R Based on this, obtain the adjusted transmission power P. For a specific description of the exposure rate allocation method, please refer to the above content.

[0277] Specifically, the electronic device 100 calculates the reference transmission power P R , the exposure rate ER, and the adjusted exposure rate ER′, the transmit power P of the antenna may be calculated.

[0278] The following describes the process in which the electronic device 100 adjusts the transmission power based on the antenna positional relationship by using a concrete example. It is assumed that the electronic device 100 allows the antennas 1 to 3 to transmit signals simultaneously. The reference transmission power P R are 120 mW, 140 mW, and 160 mW, respectively, the reference exposure rates ER are 0.5, 0.5, and 0.8, respectively, the positional relationship between antenna 1 and antenna 2 is "far away", the positional relationship between antenna 1 and antenna 3 is "far away", and the positional relationship between antenna 2 and antenna 3 is "close". For example, see the contents shown in FIG. 6(b) for the positional relationships between antennas 1 to 3. In this case, the electronic device 100 determines that antenna 1 is far away from the other antennas, and adjusts the final transmission power of antenna 1 to the reference transmission power P R , i.e., 120 mW. The electronic device 100 may preset the allowable total exposure rate. For example, when the allowable total exposure rate TER of the electronic device 100 is 0.8 and the positional relationship between the antenna 2 and the antenna 3 is "close", after the electronic device 100 adjusts the exposure rates ER' of the antenna 2 and the antenna 3 to 0.4 and 0.4, respectively, according to the exposure rate allocation method of evenly allocating the exposure rates, the electronic device 100 calculates that the final transmission power of the antenna 2 is 0.4 / 0.5×140=112 mW and the final transmission power of the antenna 3 is 0.4 / 0.8×160=80 mW according to Equation 5.

[0279] In some embodiments, the electronic device 100 may use the transmission power P as the maximum transmission power of the corresponding antenna. In this way, the actual transmission power of the electronic device 100 is smaller than the transmission power P, thereby ensuring the safety of the user and improving the communication performance of each antenna in a multi-antenna transmission scenario.

[0280] In some other embodiments, the electronic device 100 may use the transmission power P as the maximum average transmission power of the corresponding antenna. In this way, the instantaneous value of the actual transmission power of the electronic device 100 may be greater than the transmission power P, but the average transmission power in a period of time is less than or equal to the transmission power P. Specifically, the electronic device 100 may adjust the transmission power of the antenna according to a time averaging algorithm, so that in the process of the electronic device 100 actually transmitting a signal, the average value of the actual transmission power of the antenna is less than or equal to the transmission power P. In this way, the electronic device 100 may dynamically adjust the transmission power based on the actual case. For example, if the signal of the antenna is weak momentarily due to the blocking of the user's hand, the electronic device 100 may increase the transmission power of the antenna in that period of time to ensure the communication quality of the electronic device 100 as much as possible. Then, the electronic device 100 reduces the transmission power at another moment. In this way, the case where the radiation of the electronic device 100 exceeds the standard value in a period of time will not occur, and the safety of the user is still ensured.

[0281] It may be understood that any two of the single antenna power setting table, the limited transmission power setting table, and the reference exposure rate setting table may be configured for the electronic device 100. When the electronic device 100 determines the parameters of the antenna (e.g., the reference transmission power P R , limited transmission power P L When the electronic device 100 needs to use the reference exposure rate ER, the electronic device 100 can obtain the parameters from the stored setting table, or can obtain the parameters by calculation based on the two stored setting tables. The electronic device 100 can store the setting table in the internal memory 121 (e.g., NVM) of the electronic device 100.

[0282] In some embodiments, the electronic device 100 may combine the two configured setting tables into one setting table. For example, when the electronic device 100 is configured with a single antenna power setting table and a reference exposure rate setting table, the single antenna power setting table and the reference exposure rate setting table may be combined into one setting table, and the setting table includes a reference transmit power P R and the reference exposure rate ER. Table 6 shows some example contents of the configuration table.

[0283] [Table 6]

[0284] Here, P R XY (X=1, 2, ..., M, Y=1, 2, ..., N) is the reference transmission power P of antenna X in scenario Y. R and RatioXY(X=1,2,...,M,Y=1,2,...,N) is the reference exposure ratio ER of antenna X in scenario Y.

[0285] FIG. 10 is a schematic flow chart of a method for adjusting transmit power in a dual antenna transmission scenario according to an embodiment of the present application.

[0286] S201: Obtain a first distance between a first antenna and a second antenna.

[0287] For example, as shown in Fig. 6(b), the first antenna and the second antenna may be any two of antenna 1, antenna 2, and antenna 3 of the electronic device 100. The first distance is the distance between the first antenna and the second antenna.

[0288] In some embodiments, the electronic device 100 may pre-store an antenna position relationship table, and the antenna position relationship table is for determining a distance between the first antenna and the second antenna. Specifically, the electronic device 100 can obtain a first distance between the first antenna and the second antenna based on the antenna position relationship table. For a specific description of the antenna position relationship table, please refer to Table 5 and the related content of Table 5.

[0289] S202: Determine whether the first distance is greater than a first value.

[0290] The first value is a predetermined value. When the first distance is greater than the first value, the electronic device 100 may determine that the distance relationship between the first antenna and the second antenna is far away or relatively far away. In this case, the overlapping effect of the radiation of the first antenna and the second antenna is weak. When the first distance is smaller than the first value, the electronic device 100 may determine that the distance relationship between the first antenna and the second antenna is close or relatively close. In this case, the overlapping effect of the radiation of the first antenna and the second antenna is strong.

[0291] When the electronic device 100 determines that the first distance is greater than the first value, the electronic device 100 performs step S203; otherwise, the electronic device 100 performs step S204.

[0292] S203: If the first distance is greater than a first value, determine a first transmission power of the first antenna and determine a second transmission power of the second antenna, where the first transmission power is less than or equal to a first limit power and the second transmission power is less than or equal to a second limit power, the first limit power is a maximum transmission power that meets the electromagnetic emission standard when the electronic device transmits signals only through the first antenna, and the second transmission power is a maximum transmission power that meets the electromagnetic emission standard when the electronic device transmits signals only through the second antenna.

[0293] The first power limit is the transmission power limit P L and the second limiting power is the limiting transmission power P L It is.

[0294] In some embodiments, the electronic device 100 may store a first setting table. The first setting table includes a first transmission power and a second transmission power. The electronic device 100 may determine the first transmission power of the first antenna and the second transmission power of the second antenna based on the first setting table.

[0295] The first setting table may be a single antenna power setting table, and the first transmission power and the second transmission power are respectively set to the reference transmission power P R For a specific description of the single antenna configuration table, please refer to Table 2 and the related content of Table 2.

[0296] The first setting table may be a limited transmission power setting table, and the first transmission power and the second transmission power are limited transmission powers P L For a specific description of the limit transmission power setting table, please refer to Table 3 and the related content of Table 3.

[0297] In other words, when the distance between the first antenna and the second antenna is long, the electronic device 100 may adjust the transmission power of the first antenna and the second antenna based on the pre-stored power value of the electronic device 100.

[0298] In some other embodiments, the electronic device 100 may store a second setting table. The second setting table includes a first reference exposure rate and a second reference exposure rate. The electronic device 100 may determine a first transmission power of the first antenna based on the first reference exposure rate, and determine a second transmission power of the second antenna based on the second reference exposure rate. The first transmission power is a product of the first limit power and the first reference exposure rate, and the second transmission power is a product of the second limit power and the second reference exposure rate.

[0299] The second setting table may be a reference exposure rate setting table. The electronic device 100 may obtain the transmission power of the first antenna and the second antenna by calculation based on the reference exposure rate stored in the reference exposure rate setting table. The reference exposure rate is directly proportional to the transmission power of the antenna. For a specific description of the reference exposure rate setting table, please refer to Table 4 and the related content of Table 4.

[0300] In other words, when the distance between the first antenna and the second antenna is long, the electronic device 100 may obtain the transmission power of the first antenna and the second antenna by calculation based on the pre-stored exposure ratios of the antennas.

[0301] In some other embodiments, when the electronic device 100 pre-stores the transmission powers and exposure rates of the antennas, the electronic device 100 may alternatively adjust the exposure rate of the first antenna and the exposure rate of the second antenna according to an exposure rate allocation method, and then calculate the adjusted transmission powers of the antennas based on a direct proportional relationship between the exposure rates and the transmission powers. The exposure rate allocation method includes, but is not limited to, equal allocation, priority allocation, service type-based allocation, signal strength-based allocation, exposure rate ratio-based allocation, etc.

[0302] In other words, when the distance between the first antenna and the second antenna is long, the electronic device 100 cannot transmit the signal at the pre-stored power value, and readjusts the transmission power of the antenna, so that the antenna can dynamically adjust the transmission power based on the actual case, for example, can adjust the transmission power based on the signal strength or service type.

[0303] S204: If the first distance is smaller than a first value, determine a first transmission power of a first antenna and determine a second transmission power of a second antenna, where the first transmission power corresponds to a first exposure rate, the second transmission power corresponds to a second exposure rate, the first exposure rate is a ratio of the first transmission power to a first limit power, the second exposure rate is a ratio of the second transmission power to a second limit power, and a sum of the first exposure rate and the second exposure rate is less than or equal to 1.

[0304] Specifically, the electronic device 100 may determine the first exposure rate and the second exposure rate according to an exposure rate allocation method, which includes one or more of equal allocation, priority allocation, allocation based on service type, allocation based on signal strength, allocation based on ratio of exposure rates, etc. In addition, the electronic device 100 may preset a total exposure rate of the first antenna and the second antenna. The total exposure rate is the sum of the first exposure rate and the second exposure rate.

[0305] In some embodiments, the electronic device 100 may determine the first reference exposure rate and the second reference exposure rate based on a pre-stored setting table. The first reference exposure rate is a ratio of the first reference power to the first limit power, and the second reference exposure rate is a ratio of the second reference power to the second limit power. If the sum of the first reference exposure rate and the second reference exposure rate is less than or equal to 1, the electronic device 100 may determine the first reference power as the first transmission power and the second reference power as the second transmission power.

[0306] The electronic device 100 may store the single antenna setting table and the limited transmission power setting table in advance. In this manner, the electronic device 100 can obtain the first reference power and the second reference power from the single antenna setting table, and obtain the first limited power and the second limited power from the limited transmission power setting table. In this case, the electronic device 100 can determine the first reference exposure rate based on the ratio between the first reference power and the first limited power, and determine the second reference exposure rate based on the ratio between the second reference power and the second limited power.

[0307] Alternatively, the electronic device 100 may pre-store the single antenna setting table and the reference exposure rate setting table. In this manner, the electronic device 100 obtains the first reference power and the second reference power from the single antenna setting table, and obtains the first reference exposure rate and the second reference exposure rate from the reference exposure rate setting table.

[0308] Alternatively, the electronic device 100 may store the limited transmission power setting table and the reference exposure rate setting table in advance. In this manner, the electronic device 100 obtains the first limited power and the second limited power from the limited transmission power setting table, and obtains the first reference exposure rate and the second reference exposure rate from the reference exposure rate setting table. In this case, the electronic device 100 can determine the first reference power based on the product of the first limited power and the first reference exposure rate, and determine the second reference power based on the product of the second limited power and the second reference exposure rate.

[0309] S205: The first antenna transmits a signal at a first transmit power, and the second antenna transmits a signal at a second transmit power.

[0310] In some embodiments, when the electronic device 100 transmits signals via the first antenna and the second antenna, the transmission power of the first antenna may be equal to or less than the first transmission power, or the average transmission power of the first antenna in a first time period is equal to or less than the first transmission power. The first time period is equal to or less than the time period specified in the electromagnetic emission standard. In addition, the transmission power of the second antenna may also be equal to or less than the second transmission power, or the average transmission power of the second antenna in a first time period is equal to or less than the second transmission power. The first time period is equal to or less than the time period specified in the electromagnetic emission standard.

[0311] In other words, the actual transmission power of the first antenna and / or the actual transmission power of the second antenna does not exceed the first transmission power and the second transmission power, respectively, determined by the electronic device 100, or the average transmission power of the first antenna and / or the second antenna within a period of time does not exceed the first transmission power and the second transmission power, respectively, determined by the electronic device 100. In other words, the first transmission power and the second transmission power may be the maximum transmission power of the antennas determined by the electronic device 100, or may be the maximum average transmission power of the antennas determined by the electronic device 100.

[0312] When the electronic device 100 determines that the first transmission power and the second transmission power are maximum average transmission powers, the electronic device 100 can use a time averaging algorithm to ensure that the average value of the transmission power of the first antenna within a period of time does not exceed the first transmission power, and that the average value of the transmission power of the second antenna within this period of time does not exceed the second transmission power.

[0313] Referring to FIG. 11, the following describes a schematic diagram of the structure of a transmission power adjusting device according to an embodiment of the present application.

[0314] As shown in FIG. 11 , the transmission power adjustment device may include an identification module 301, a storage module 302, an adjustment module 303, and a transmission module 304.

[0315] The identification module 301 may be configured to obtain the distance between the antennas in a multi-antenna transmission scenario. In addition, before obtaining the distance between the antennas, the identification module 301 is further configured to identify whether the electronic device 100 is in a multi-antenna transmission scenario, i.e., whether the electronic device 100 transmits signals via multiple antennas or is going to transmit signals via multiple antennas within a first time period. When determining that the electronic device 100 is in a multi-antenna transmission scenario, the identification module 301 obtains the distance between the antennas from the storage module 302 based on the antennas that need to transmit signals or the antennas that are transmitting signals.

[0316] The storage module 302 stores an antenna position relationship table and any two of a single antenna power setting table, a reference exposure rate setting table, and a limited transmission power setting table. In addition, the storage module 302 may further store a total exposure rate, and the electronic device 100 may adjust the exposure rate of each antenna based on the total exposure rate to calculate the transmission power of each antenna. The storage module 302 selects the reference transmission power P from any two of the antenna position relationship table, the single antenna power setting table, the reference exposure rate setting table, and the limited transmission power setting table based on the antenna indication information sent by the identification module 301. R , the reference exposure rate ER, and the antenna position relationship are obtained, and the reference transmission power P R , the reference exposure rate ER, and the antenna position relationship can be sent to the adjustment module 303.

[0317] The adjustment module 303 can determine whether the electronic device 100 needs to adjust the exposure rate of the antenna according to the positional relationship of the antennas and the reference exposure rate ER of the antenna. Specifically, when a single antenna is far from another antenna, the electronic device 100 can adjust the transmission power according to a power adjustment method, for example, by adjusting the transmission power of the antenna to the reference transmission power PR When there are multiple antennas close to each other, the electronic device 100 may determine whether to adjust the exposure rate of the antenna based on whether the total reference exposure TER of these antennas is less than 1. When TER≦1, the electronic device 100 may adjust the transmission power according to a power adjustment method, for example, adjusting the transmission power of the antenna to the reference transmission power P R When TER>1, the electronic device 100 adjusts the exposure rates of the multiple antennas according to the exposure rate allocation method, and calculates the transmission powers of the antennas based on the adjusted exposure rates. Then, the electronic device 100 sends the determined transmission powers of the antennas to the transmission module 304.

[0318] The transmitting module 304 may be configured to transmit the signal at the final determined transmit power of each antenna, or the transmitting module 204 transmits the signal according to a time averaging algorithm by using the final determined transmit power of each antenna as an average transmit power to ensure that the average value of the actual transmit power is less than or equal to the transmit power within a period of time.

[0319] The implementations of the present application may be randomly combined to achieve different technical effects.

[0320] All or part of the above-mentioned embodiments may be implemented by using software, hardware, firmware, or any combination thereof. When software is used to implement the embodiments, all or part of the embodiments may be implemented in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded into a computer and executed, the procedures or functions according to the present application are generated in whole or in part. The computer may be a general-purpose computer, a special-purpose computer, a computer network, or another programmable device. The computer instructions may be stored in a computer-readable storage medium or transmitted from a computer-readable storage medium to another computer-readable storage medium. For example, the computer instructions may be transmitted from a website, computer, server, or data center to another website, computer, server, or data center in a wired (e.g., coaxial cable, fiber optic, or digital subscriber line) or wireless (e.g., infrared, radio, or microwave) manner. The computer-readable storage medium may be any available medium accessible by a computer, or a data storage device integrating one or more available media, such as a server or data center. The available media may be magnetic media (e.g., floppy disks, hard disks, or magnetic tapes), optical media (e.g., DVDs), semiconductor media (e.g., solid-state disks (SSDs)), and the like.

[0321] Those skilled in the art may understand that all or part of the process of the method in the embodiment may be implemented by a computer program that instructs relevant hardware. The program may be stored in a computer-readable storage medium. When the program is executed, the process of the method in the embodiment is executed. The aforementioned storage medium includes any medium that can store program code, such as a ROM, a random access memory RAM, a magnetic disk, or an optical disk.

[0322] In conclusion, the above description is only an embodiment of the technical solution of the present invention, and does not limit the protection scope of the present invention. Any modification, equivalent replacement, or improvement made according to the disclosure of the present invention shall fall within the protection scope of the present invention.

Claims

1. An electronic device including a memory, one or more processors, a plurality of applications, and one or more programs, the one or more programs being stored in the memory, the one or more processors executing the one or more programs enabling the electronic device to implement a transmission power adjustment method, the electronic device including a first antenna and a second antenna, the method comprising: obtaining, by the electronic device, a first distance between the first antenna and the second antenna; determining, by the electronic device, whether the first distance is greater than a first value; determining, by the electronic device, a first transmit power for the first antenna and determining a second transmit power for the second antenna; if the first distance is greater than the first value, the first transmission power is less than or equal to a first limit power, the second transmission power is less than or equal to a second limit power, the first limit power being a maximum transmission power that satisfies an electromagnetic radiation standard when the electronic device transmits signals only through the first antenna, and the second limit power being a maximum transmission power that satisfies the electromagnetic radiation standard when the electronic device transmits signals only through the second antenna; if the first distance is less than the first value, a sum of a first exposure rate corresponding to the first transmit power and a second exposure rate corresponding to the second transmit power is less than or equal to 1, the first exposure rate being a ratio of the first transmit power to the first limit power, and the second exposure rate being a ratio of the second transmit power to the second limit power; transmitting, by the electronic device, a signal through the first antenna at the first transmit power and simultaneously transmitting, by the electronic device, a signal through the second antenna at the second transmit power; [0026] An electronic device including

2. 2. The electronic device of claim 1, wherein an average transmit power of the first antenna within a first time period is less than or equal to the first transmit power, the first time period being less than or equal to a time period specified in the electromagnetic emissions standard.

3. An electronic device as described in claim 1 or 2, wherein the average transmit power of the second antenna within a first time period is less than or equal to the second transmit power, and the first time period is less than or equal to a time period specified in the electromagnetic emissions standard.

4. the electronic device stores a first setting table, the first setting table including the first transmission power and the second transmission power, and if the first distance is greater than the first value, Determining a first transmission power of the first antenna and determining a second transmission power of the second antenna by the electronic device may in particular include:

3. The electronic device according to claim 1, further comprising: determining, by the electronic device, the first transmission power of the first antenna and determining the second transmission power of the second antenna based on the first setting table.

5. The electronic device stores a second setting table, the second setting table including a first reference exposure rate and a second reference exposure rate, and when the first distance is greater than the first value, determining, by the electronic device, a first transmission power of the first antenna and determining a second transmission power of the second antenna, particularly 3. The electronic device of claim 1, further comprising: determining, by the electronic device, the first transmit power of the first antenna based on the first reference exposure rate and determining the second transmit power of the second antenna based on the second reference exposure rate, wherein the first transmit power is a product of the first limit power and the first reference exposure rate, and the second transmit power is a product of the second limit power and the second reference exposure rate.

6. Determining, by the electronic device, a first transmission power of the first antenna and determining a second transmission power of the second antenna when the first distance is less than the first value, may in particular determining, by the electronic device, the first exposure rate and the second exposure rate according to an exposure rate allocation method, the exposure rate allocation method including one or more of equal allocation, priority allocation, service type based allocation, signal strength based allocation, or exposure rate ratio based allocation; 3. The electronic device of claim 1, further comprising: determining, by the electronic device, the first transmit power of the first antenna based on the first exposure rate, and determining the second transmit power of the second antenna based on the second exposure rate.

7. 7. The electronic device of claim 6, wherein the electronic device presets a total exposure rate of the first antenna and the second antenna, the total exposure rate being a sum of the first exposure rate and the second exposure rate.

8. Determining, by the electronic device, a first transmission power of the first antenna and determining a second transmission power of the second antenna when the first distance is less than the first value, may in particular obtaining, by the electronic device, a first reference exposure rate and a second reference exposure rate, the first reference exposure rate being a ratio of a first reference power to the first power limit, the second reference exposure rate being a ratio of a second reference power to the second power limit, the first reference power being less than or equal to the first power limit, and the second reference power being less than or equal to the second power limit; 3. The electronic device of claim 1, further comprising: when a sum of the first reference exposure rate and the second reference exposure rate is less than or equal to 1, determining, by the electronic device, the first reference power as the first transmission power, and determining, by the electronic device, the second reference power as the second transmission power.

9. The electronic device stores the first reference power, the second reference power, the first reference exposure rate, and the second reference exposure rate, or The electronic device stores the first reference power, the second reference power, the first limit power, and the second limit power, or The electronic device of claim 8 , wherein the electronic device stores the first reference exposure rate, the second reference exposure rate, the first limit power, and the second limit power.

10. The electronic device pre-stores an antenna location relationship table, the antenna location relationship table being for determining a distance between the first antenna and the second antenna; Obtaining a first distance between the first antenna and the second antenna by the electronic device may particularly include: The electronic device of claim 1 or 2, further comprising: obtaining, by the electronic device, the first distance between the first antenna and the second antenna based on the antenna location relationship table.

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